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/* |
/* |
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* security/ccsecurity/policy_io.c |
* security/ccsecurity/policy_io.c |
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* |
* |
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* Copyright (C) 2005-2010 NTT DATA CORPORATION |
* Copyright (C) 2005-2011 NTT DATA CORPORATION |
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* |
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* Version: 1.7.2 2010/04/01 |
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* |
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* This file is applicable to both 2.4.30 and 2.6.11 and later. |
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* See README.ccs for ChangeLog. |
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* |
* |
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* Version: 1.8.3+ 2011/10/25 |
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*/ |
*/ |
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#include "internal.h" |
#include "internal.h" |
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| 11 |
static struct ccs_profile ccs_default_profile = { |
/***** SECTION1: Constants definition *****/ |
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.learning = &ccs_default_profile.preference, |
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| 13 |
.permissive = &ccs_default_profile.preference, |
/* Define this to enable debug mode. */ |
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.enforcing = &ccs_default_profile.preference, |
/* #define DEBUG_CONDITION */ |
| 15 |
.audit = &ccs_default_profile.preference, |
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| 16 |
#ifdef CONFIG_CCSECURITY_AUDIT |
#ifdef DEBUG_CONDITION |
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.preference.audit_max_grant_log = CONFIG_CCSECURITY_MAX_GRANT_LOG, |
#define dprintk printk |
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.preference.audit_max_reject_log = CONFIG_CCSECURITY_MAX_REJECT_LOG, |
#else |
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#endif |
#define dprintk(...) do { } while (0) |
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.preference.audit_task_info = true, |
#endif |
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.preference.audit_path_info = true, |
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.preference.enforcing_penalty = 0, |
/* Mapping table from "enum ccs_mac_index" to "enum ccs_mac_category_index". */ |
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.preference.enforcing_verbose = true, |
static const u8 ccs_index2category[CCS_MAX_MAC_INDEX] = { |
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.preference.learning_max_entry = CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY, |
/* CONFIG::file group */ |
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.preference.learning_verbose = false, |
[CCS_MAC_FILE_EXECUTE] = CCS_MAC_CATEGORY_FILE, |
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.preference.learning_exec_realpath = true, |
[CCS_MAC_FILE_OPEN] = CCS_MAC_CATEGORY_FILE, |
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.preference.learning_exec_argv0 = true, |
[CCS_MAC_FILE_CREATE] = CCS_MAC_CATEGORY_FILE, |
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.preference.learning_symlink_target = true, |
[CCS_MAC_FILE_UNLINK] = CCS_MAC_CATEGORY_FILE, |
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.preference.permissive_verbose = true |
#ifdef CONFIG_CCSECURITY_FILE_GETATTR |
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[CCS_MAC_FILE_GETATTR] = CCS_MAC_CATEGORY_FILE, |
| 31 |
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#endif |
| 32 |
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[CCS_MAC_FILE_MKDIR] = CCS_MAC_CATEGORY_FILE, |
| 33 |
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[CCS_MAC_FILE_RMDIR] = CCS_MAC_CATEGORY_FILE, |
| 34 |
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[CCS_MAC_FILE_MKFIFO] = CCS_MAC_CATEGORY_FILE, |
| 35 |
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[CCS_MAC_FILE_MKSOCK] = CCS_MAC_CATEGORY_FILE, |
| 36 |
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[CCS_MAC_FILE_TRUNCATE] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_SYMLINK] = CCS_MAC_CATEGORY_FILE, |
| 38 |
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[CCS_MAC_FILE_MKBLOCK] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_MKCHAR] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_LINK] = CCS_MAC_CATEGORY_FILE, |
| 41 |
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[CCS_MAC_FILE_RENAME] = CCS_MAC_CATEGORY_FILE, |
| 42 |
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[CCS_MAC_FILE_CHMOD] = CCS_MAC_CATEGORY_FILE, |
| 43 |
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[CCS_MAC_FILE_CHOWN] = CCS_MAC_CATEGORY_FILE, |
| 44 |
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[CCS_MAC_FILE_CHGRP] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_IOCTL] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_CHROOT] = CCS_MAC_CATEGORY_FILE, |
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[CCS_MAC_FILE_MOUNT] = CCS_MAC_CATEGORY_FILE, |
| 48 |
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[CCS_MAC_FILE_UMOUNT] = CCS_MAC_CATEGORY_FILE, |
| 49 |
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[CCS_MAC_FILE_PIVOT_ROOT] = CCS_MAC_CATEGORY_FILE, |
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/* CONFIG::misc group */ |
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[CCS_MAC_ENVIRON] = CCS_MAC_CATEGORY_MISC, |
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#ifdef CONFIG_CCSECURITY_NETWORK |
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/* CONFIG::network group */ |
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[CCS_MAC_NETWORK_INET_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_DGRAM_SEND] = CCS_MAC_CATEGORY_NETWORK, |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_DGRAM_RECV] = CCS_MAC_CATEGORY_NETWORK, |
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#endif |
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[CCS_MAC_NETWORK_INET_RAW_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_RAW_SEND] = CCS_MAC_CATEGORY_NETWORK, |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_RAW_RECV] = CCS_MAC_CATEGORY_NETWORK, |
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#endif |
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[CCS_MAC_NETWORK_UNIX_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
| 70 |
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[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
| 71 |
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[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
| 72 |
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[CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
| 73 |
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[CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = CCS_MAC_CATEGORY_NETWORK, |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = CCS_MAC_CATEGORY_NETWORK, |
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#endif |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
| 79 |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
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#endif |
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#ifdef CONFIG_CCSECURITY_IPC |
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/* CONFIG::ipc group */ |
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[CCS_MAC_SIGNAL] = CCS_MAC_CATEGORY_IPC, |
| 85 |
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#endif |
| 86 |
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#ifdef CONFIG_CCSECURITY_CAPABILITY |
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/* CONFIG::capability group */ |
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[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY, |
| 89 |
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[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY, |
| 90 |
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[CCS_MAC_CAPABILITY_SYS_REBOOT] = CCS_MAC_CATEGORY_CAPABILITY, |
| 91 |
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[CCS_MAC_CAPABILITY_SYS_VHANGUP] = CCS_MAC_CATEGORY_CAPABILITY, |
| 92 |
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[CCS_MAC_CAPABILITY_SYS_SETTIME] = CCS_MAC_CATEGORY_CAPABILITY, |
| 93 |
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[CCS_MAC_CAPABILITY_SYS_NICE] = CCS_MAC_CATEGORY_CAPABILITY, |
| 94 |
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[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = CCS_MAC_CATEGORY_CAPABILITY, |
| 95 |
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[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = CCS_MAC_CATEGORY_CAPABILITY, |
| 96 |
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[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = CCS_MAC_CATEGORY_CAPABILITY, |
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[CCS_MAC_CAPABILITY_SYS_PTRACE] = CCS_MAC_CATEGORY_CAPABILITY, |
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#endif |
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}; |
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| 101 |
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/* String table for operation mode. */ |
| 102 |
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static const char * const ccs_mode[CCS_CONFIG_MAX_MODE] = { |
| 103 |
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[CCS_CONFIG_DISABLED] = "disabled", |
| 104 |
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[CCS_CONFIG_LEARNING] = "learning", |
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[CCS_CONFIG_PERMISSIVE] = "permissive", |
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[CCS_CONFIG_ENFORCING] = "enforcing" |
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}; |
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/* String table for /proc/ccs/profile interface. */ |
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const char * const ccs_mac_keywords[CCS_MAX_MAC_INDEX |
| 111 |
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+ CCS_MAX_MAC_CATEGORY_INDEX] = { |
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/* CONFIG::file group */ |
| 113 |
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[CCS_MAC_FILE_EXECUTE] = "execute", |
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[CCS_MAC_FILE_OPEN] = "open", |
| 115 |
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[CCS_MAC_FILE_CREATE] = "create", |
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[CCS_MAC_FILE_UNLINK] = "unlink", |
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#ifdef CONFIG_CCSECURITY_FILE_GETATTR |
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[CCS_MAC_FILE_GETATTR] = "getattr", |
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#endif |
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[CCS_MAC_FILE_MKDIR] = "mkdir", |
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[CCS_MAC_FILE_RMDIR] = "rmdir", |
| 122 |
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[CCS_MAC_FILE_MKFIFO] = "mkfifo", |
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[CCS_MAC_FILE_MKSOCK] = "mksock", |
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[CCS_MAC_FILE_TRUNCATE] = "truncate", |
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[CCS_MAC_FILE_SYMLINK] = "symlink", |
| 126 |
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[CCS_MAC_FILE_MKBLOCK] = "mkblock", |
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[CCS_MAC_FILE_MKCHAR] = "mkchar", |
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[CCS_MAC_FILE_LINK] = "link", |
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[CCS_MAC_FILE_RENAME] = "rename", |
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[CCS_MAC_FILE_CHMOD] = "chmod", |
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[CCS_MAC_FILE_CHOWN] = "chown", |
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[CCS_MAC_FILE_CHGRP] = "chgrp", |
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[CCS_MAC_FILE_IOCTL] = "ioctl", |
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[CCS_MAC_FILE_CHROOT] = "chroot", |
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[CCS_MAC_FILE_MOUNT] = "mount", |
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[CCS_MAC_FILE_UMOUNT] = "unmount", |
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[CCS_MAC_FILE_PIVOT_ROOT] = "pivot_root", |
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/* CONFIG::misc group */ |
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[CCS_MAC_ENVIRON] = "env", |
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#ifdef CONFIG_CCSECURITY_NETWORK |
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/* CONFIG::network group */ |
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[CCS_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", |
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[CCS_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", |
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[CCS_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", |
| 145 |
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[CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = "inet_stream_accept", |
| 146 |
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[CCS_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", |
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[CCS_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", |
| 148 |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_DGRAM_RECV] = "inet_dgram_recv", |
| 150 |
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#endif |
| 151 |
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[CCS_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", |
| 152 |
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[CCS_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", |
| 153 |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_RAW_RECV] = "inet_raw_recv", |
| 155 |
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#endif |
| 156 |
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[CCS_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", |
| 157 |
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[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", |
| 158 |
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[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", |
| 159 |
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[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = "unix_stream_accept", |
| 160 |
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[CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", |
| 161 |
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[CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", |
| 162 |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = "unix_dgram_recv", |
| 164 |
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#endif |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", |
| 166 |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", |
| 167 |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", |
| 168 |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = "unix_seqpacket_accept", |
| 169 |
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#endif |
| 170 |
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#ifdef CONFIG_CCSECURITY_IPC |
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/* CONFIG::ipc group */ |
| 172 |
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[CCS_MAC_SIGNAL] = "signal", |
| 173 |
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#endif |
| 174 |
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#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 175 |
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/* CONFIG::capability group */ |
| 176 |
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[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = "use_route", |
| 177 |
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[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = "use_packet", |
| 178 |
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[CCS_MAC_CAPABILITY_SYS_REBOOT] = "SYS_REBOOT", |
| 179 |
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[CCS_MAC_CAPABILITY_SYS_VHANGUP] = "SYS_VHANGUP", |
| 180 |
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[CCS_MAC_CAPABILITY_SYS_SETTIME] = "SYS_TIME", |
| 181 |
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[CCS_MAC_CAPABILITY_SYS_NICE] = "SYS_NICE", |
| 182 |
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[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
| 183 |
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[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = "use_kernel_module", |
| 184 |
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[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
| 185 |
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[CCS_MAC_CAPABILITY_SYS_PTRACE] = "SYS_PTRACE", |
| 186 |
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#endif |
| 187 |
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/* CONFIG group */ |
| 188 |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_FILE] = "file", |
| 189 |
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#ifdef CONFIG_CCSECURITY_NETWORK |
| 190 |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_NETWORK] = "network", |
| 191 |
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#endif |
| 192 |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_MISC] = "misc", |
| 193 |
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#ifdef CONFIG_CCSECURITY_IPC |
| 194 |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_IPC] = "ipc", |
| 195 |
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#endif |
| 196 |
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#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 197 |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
| 198 |
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#endif |
| 199 |
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}; |
| 200 |
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|
| 201 |
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/* String table for path operation. */ |
| 202 |
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const char * const ccs_path_keyword[CCS_MAX_PATH_OPERATION] = { |
| 203 |
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[CCS_TYPE_EXECUTE] = "execute", |
| 204 |
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[CCS_TYPE_READ] = "read", |
| 205 |
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[CCS_TYPE_WRITE] = "write", |
| 206 |
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[CCS_TYPE_APPEND] = "append", |
| 207 |
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[CCS_TYPE_UNLINK] = "unlink", |
| 208 |
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#ifdef CONFIG_CCSECURITY_FILE_GETATTR |
| 209 |
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[CCS_TYPE_GETATTR] = "getattr", |
| 210 |
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#endif |
| 211 |
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[CCS_TYPE_RMDIR] = "rmdir", |
| 212 |
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[CCS_TYPE_TRUNCATE] = "truncate", |
| 213 |
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[CCS_TYPE_SYMLINK] = "symlink", |
| 214 |
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[CCS_TYPE_CHROOT] = "chroot", |
| 215 |
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[CCS_TYPE_UMOUNT] = "unmount", |
| 216 |
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}; |
| 217 |
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|
| 218 |
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#ifdef CONFIG_CCSECURITY_NETWORK |
| 219 |
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/* String table for socket's operation. */ |
| 220 |
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const char * const ccs_socket_keyword[CCS_MAX_NETWORK_OPERATION] = { |
| 221 |
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[CCS_NETWORK_BIND] = "bind", |
| 222 |
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[CCS_NETWORK_LISTEN] = "listen", |
| 223 |
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[CCS_NETWORK_CONNECT] = "connect", |
| 224 |
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[CCS_NETWORK_ACCEPT] = "accept", |
| 225 |
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[CCS_NETWORK_SEND] = "send", |
| 226 |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
| 227 |
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[CCS_NETWORK_RECV] = "recv", |
| 228 |
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#endif |
| 229 |
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}; |
| 230 |
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#endif |
| 231 |
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|
| 232 |
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/* String table for categories. */ |
| 233 |
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static const char * const ccs_category_keywords[CCS_MAX_MAC_CATEGORY_INDEX] = { |
| 234 |
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[CCS_MAC_CATEGORY_FILE] = "file", |
| 235 |
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#ifdef CONFIG_CCSECURITY_NETWORK |
| 236 |
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[CCS_MAC_CATEGORY_NETWORK] = "network", |
| 237 |
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#endif |
| 238 |
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[CCS_MAC_CATEGORY_MISC] = "misc", |
| 239 |
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#ifdef CONFIG_CCSECURITY_IPC |
| 240 |
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[CCS_MAC_CATEGORY_IPC] = "ipc", |
| 241 |
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#endif |
| 242 |
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#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 243 |
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[CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
| 244 |
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#endif |
| 245 |
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}; |
| 246 |
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|
| 247 |
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/* String table for conditions. */ |
| 248 |
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static const char * const ccs_condition_keyword[CCS_MAX_CONDITION_KEYWORD] = { |
| 249 |
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[CCS_TASK_UID] = "task.uid", |
| 250 |
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[CCS_TASK_EUID] = "task.euid", |
| 251 |
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[CCS_TASK_SUID] = "task.suid", |
| 252 |
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[CCS_TASK_FSUID] = "task.fsuid", |
| 253 |
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[CCS_TASK_GID] = "task.gid", |
| 254 |
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[CCS_TASK_EGID] = "task.egid", |
| 255 |
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[CCS_TASK_SGID] = "task.sgid", |
| 256 |
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[CCS_TASK_FSGID] = "task.fsgid", |
| 257 |
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[CCS_TASK_PID] = "task.pid", |
| 258 |
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[CCS_TASK_PPID] = "task.ppid", |
| 259 |
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[CCS_EXEC_ARGC] = "exec.argc", |
| 260 |
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[CCS_EXEC_ENVC] = "exec.envc", |
| 261 |
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[CCS_TYPE_IS_SOCKET] = "socket", |
| 262 |
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[CCS_TYPE_IS_SYMLINK] = "symlink", |
| 263 |
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[CCS_TYPE_IS_FILE] = "file", |
| 264 |
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[CCS_TYPE_IS_BLOCK_DEV] = "block", |
| 265 |
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[CCS_TYPE_IS_DIRECTORY] = "directory", |
| 266 |
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[CCS_TYPE_IS_CHAR_DEV] = "char", |
| 267 |
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[CCS_TYPE_IS_FIFO] = "fifo", |
| 268 |
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[CCS_MODE_SETUID] = "setuid", |
| 269 |
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[CCS_MODE_SETGID] = "setgid", |
| 270 |
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[CCS_MODE_STICKY] = "sticky", |
| 271 |
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[CCS_MODE_OWNER_READ] = "owner_read", |
| 272 |
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[CCS_MODE_OWNER_WRITE] = "owner_write", |
| 273 |
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[CCS_MODE_OWNER_EXECUTE] = "owner_execute", |
| 274 |
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[CCS_MODE_GROUP_READ] = "group_read", |
| 275 |
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[CCS_MODE_GROUP_WRITE] = "group_write", |
| 276 |
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[CCS_MODE_GROUP_EXECUTE] = "group_execute", |
| 277 |
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[CCS_MODE_OTHERS_READ] = "others_read", |
| 278 |
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[CCS_MODE_OTHERS_WRITE] = "others_write", |
| 279 |
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[CCS_MODE_OTHERS_EXECUTE] = "others_execute", |
| 280 |
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[CCS_TASK_TYPE] = "task.type", |
| 281 |
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[CCS_TASK_EXECUTE_HANDLER] = "execute_handler", |
| 282 |
|
[CCS_EXEC_REALPATH] = "exec.realpath", |
| 283 |
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[CCS_SYMLINK_TARGET] = "symlink.target", |
| 284 |
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[CCS_PATH1_UID] = "path1.uid", |
| 285 |
|
[CCS_PATH1_GID] = "path1.gid", |
| 286 |
|
[CCS_PATH1_INO] = "path1.ino", |
| 287 |
|
[CCS_PATH1_MAJOR] = "path1.major", |
| 288 |
|
[CCS_PATH1_MINOR] = "path1.minor", |
| 289 |
|
[CCS_PATH1_PERM] = "path1.perm", |
| 290 |
|
[CCS_PATH1_TYPE] = "path1.type", |
| 291 |
|
[CCS_PATH1_DEV_MAJOR] = "path1.dev_major", |
| 292 |
|
[CCS_PATH1_DEV_MINOR] = "path1.dev_minor", |
| 293 |
|
[CCS_PATH2_UID] = "path2.uid", |
| 294 |
|
[CCS_PATH2_GID] = "path2.gid", |
| 295 |
|
[CCS_PATH2_INO] = "path2.ino", |
| 296 |
|
[CCS_PATH2_MAJOR] = "path2.major", |
| 297 |
|
[CCS_PATH2_MINOR] = "path2.minor", |
| 298 |
|
[CCS_PATH2_PERM] = "path2.perm", |
| 299 |
|
[CCS_PATH2_TYPE] = "path2.type", |
| 300 |
|
[CCS_PATH2_DEV_MAJOR] = "path2.dev_major", |
| 301 |
|
[CCS_PATH2_DEV_MINOR] = "path2.dev_minor", |
| 302 |
|
[CCS_PATH1_PARENT_UID] = "path1.parent.uid", |
| 303 |
|
[CCS_PATH1_PARENT_GID] = "path1.parent.gid", |
| 304 |
|
[CCS_PATH1_PARENT_INO] = "path1.parent.ino", |
| 305 |
|
[CCS_PATH1_PARENT_PERM] = "path1.parent.perm", |
| 306 |
|
[CCS_PATH2_PARENT_UID] = "path2.parent.uid", |
| 307 |
|
[CCS_PATH2_PARENT_GID] = "path2.parent.gid", |
| 308 |
|
[CCS_PATH2_PARENT_INO] = "path2.parent.ino", |
| 309 |
|
[CCS_PATH2_PARENT_PERM] = "path2.parent.perm", |
| 310 |
|
}; |
| 311 |
|
|
| 312 |
|
/* String table for PREFERENCE keyword. */ |
| 313 |
|
static const char * const ccs_pref_keywords[CCS_MAX_PREF] = { |
| 314 |
|
[CCS_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
| 315 |
|
[CCS_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
| 316 |
|
[CCS_PREF_ENFORCING_PENALTY] = "enforcing_penalty", |
| 317 |
|
}; |
| 318 |
|
|
| 319 |
|
/* String table for domain flags. */ |
| 320 |
|
const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS] = { |
| 321 |
|
[CCS_DIF_QUOTA_WARNED] = "quota_exceeded\n", |
| 322 |
|
[CCS_DIF_TRANSITION_FAILED] = "transition_failed\n", |
| 323 |
|
}; |
| 324 |
|
|
| 325 |
|
/* String table for domain transition control keywords. */ |
| 326 |
|
static const char * const ccs_transition_type[CCS_MAX_TRANSITION_TYPE] = { |
| 327 |
|
[CCS_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
| 328 |
|
[CCS_TRANSITION_CONTROL_RESET] = "reset_domain ", |
| 329 |
|
[CCS_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", |
| 330 |
|
[CCS_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", |
| 331 |
|
[CCS_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", |
| 332 |
|
[CCS_TRANSITION_CONTROL_KEEP] = "keep_domain ", |
| 333 |
}; |
}; |
| 334 |
|
|
| 335 |
/* Profile version. Currently only 20090903 is defined. */ |
/* String table for grouping keywords. */ |
| 336 |
static unsigned int ccs_profile_version; |
static const char * const ccs_group_name[CCS_MAX_GROUP] = { |
| 337 |
|
[CCS_PATH_GROUP] = "path_group ", |
| 338 |
|
[CCS_NUMBER_GROUP] = "number_group ", |
| 339 |
|
#ifdef CONFIG_CCSECURITY_NETWORK |
| 340 |
|
[CCS_ADDRESS_GROUP] = "address_group ", |
| 341 |
|
#endif |
| 342 |
|
}; |
| 343 |
|
|
| 344 |
|
/* String table for /proc/ccs/stat interface. */ |
| 345 |
|
static const char * const ccs_policy_headers[CCS_MAX_POLICY_STAT] = { |
| 346 |
|
[CCS_STAT_POLICY_UPDATES] = "update:", |
| 347 |
|
[CCS_STAT_POLICY_LEARNING] = "violation in learning mode:", |
| 348 |
|
[CCS_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", |
| 349 |
|
[CCS_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", |
| 350 |
|
}; |
| 351 |
|
|
| 352 |
/* Profile table. Memory is allocated as needed. */ |
/* String table for /proc/ccs/stat interface. */ |
| 353 |
static struct ccs_profile *ccs_profile_ptr[CCS_MAX_PROFILES]; |
static const char * const ccs_memory_headers[CCS_MAX_MEMORY_STAT] = { |
| 354 |
|
[CCS_MEMORY_POLICY] = "policy:", |
| 355 |
|
[CCS_MEMORY_AUDIT] = "audit log:", |
| 356 |
|
[CCS_MEMORY_QUERY] = "query message:", |
| 357 |
|
}; |
| 358 |
|
|
| 359 |
|
/***** SECTION2: Structure definition *****/ |
| 360 |
|
|
| 361 |
/* String table for functionality that takes 4 modes. */ |
struct iattr; |
| 362 |
static const char *ccs_mode_4[4] = { |
|
| 363 |
"disabled", "learning", "permissive", "enforcing" |
/* Structure for query. */ |
| 364 |
|
struct ccs_query { |
| 365 |
|
struct list_head list; |
| 366 |
|
struct ccs_domain_info *domain; |
| 367 |
|
char *query; |
| 368 |
|
size_t query_len; |
| 369 |
|
unsigned int serial; |
| 370 |
|
u8 timer; |
| 371 |
|
u8 answer; |
| 372 |
|
u8 retry; |
| 373 |
}; |
}; |
| 374 |
|
|
| 375 |
/* String table for /proc/ccs/profile */ |
/* Structure for audit log. */ |
| 376 |
static const char *ccs_mac_keywords[CCS_MAX_MAC_INDEX + |
struct ccs_log { |
| 377 |
CCS_MAX_CAPABILITY_INDEX + |
struct list_head list; |
| 378 |
CCS_MAX_MAC_CATEGORY_INDEX] = { |
char *log; |
| 379 |
[CCS_MAC_FILE_EXECUTE] |
int size; |
|
= "file::execute", |
|
|
[CCS_MAC_FILE_OPEN] |
|
|
= "file::open", |
|
|
[CCS_MAC_FILE_CREATE] |
|
|
= "file::create", |
|
|
[CCS_MAC_FILE_UNLINK] |
|
|
= "file::unlink", |
|
|
[CCS_MAC_FILE_MKDIR] |
|
|
= "file::mkdir", |
|
|
[CCS_MAC_FILE_RMDIR] |
|
|
= "file::rmdir", |
|
|
[CCS_MAC_FILE_MKFIFO] |
|
|
= "file::mkfifo", |
|
|
[CCS_MAC_FILE_MKSOCK] |
|
|
= "file::mksock", |
|
|
[CCS_MAC_FILE_TRUNCATE] |
|
|
= "file::truncate", |
|
|
[CCS_MAC_FILE_SYMLINK] |
|
|
= "file::symlink", |
|
|
[CCS_MAC_FILE_REWRITE] |
|
|
= "file::rewrite", |
|
|
[CCS_MAC_FILE_MKBLOCK] |
|
|
= "file::mkblock", |
|
|
[CCS_MAC_FILE_MKCHAR] |
|
|
= "file::mkchar", |
|
|
[CCS_MAC_FILE_LINK] |
|
|
= "file::link", |
|
|
[CCS_MAC_FILE_RENAME] |
|
|
= "file::rename", |
|
|
[CCS_MAC_FILE_CHMOD] |
|
|
= "file::chmod", |
|
|
[CCS_MAC_FILE_CHOWN] |
|
|
= "file::chown", |
|
|
[CCS_MAC_FILE_CHGRP] |
|
|
= "file::chgrp", |
|
|
[CCS_MAC_FILE_IOCTL] |
|
|
= "file::ioctl", |
|
|
[CCS_MAC_FILE_CHROOT] |
|
|
= "file::chroot", |
|
|
[CCS_MAC_FILE_MOUNT] |
|
|
= "file::mount", |
|
|
[CCS_MAC_FILE_UMOUNT] |
|
|
= "file::umount", |
|
|
[CCS_MAC_FILE_PIVOT_ROOT] |
|
|
= "file::pivot_root", |
|
|
[CCS_MAC_FILE_TRANSIT] |
|
|
= "file::transit", |
|
|
[CCS_MAC_ENVIRON] |
|
|
= "misc::env", |
|
|
[CCS_MAC_NETWORK_UDP_BIND] |
|
|
= "network::inet_udp_bind", |
|
|
[CCS_MAC_NETWORK_UDP_CONNECT] |
|
|
= "network::inet_udp_connect", |
|
|
[CCS_MAC_NETWORK_TCP_BIND] |
|
|
= "network::inet_tcp_bind", |
|
|
[CCS_MAC_NETWORK_TCP_LISTEN] |
|
|
= "network::inet_tcp_listen", |
|
|
[CCS_MAC_NETWORK_TCP_CONNECT] |
|
|
= "network::inet_tcp_connect", |
|
|
[CCS_MAC_NETWORK_TCP_ACCEPT] |
|
|
= "network::inet_tcp_accept", |
|
|
[CCS_MAC_NETWORK_RAW_BIND] |
|
|
= "network::inet_raw_bind", |
|
|
[CCS_MAC_NETWORK_RAW_CONNECT] |
|
|
= "network::inet_raw_connect", |
|
|
[CCS_MAC_SIGNAL] |
|
|
= "ipc::signal", |
|
|
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CREATE] |
|
|
= "capability::inet_tcp_create", |
|
|
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_LISTEN] |
|
|
= "capability::inet_tcp_listen", |
|
|
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CONNECT] |
|
|
= "capability::inet_tcp_connect", |
|
|
[CCS_MAX_MAC_INDEX + CCS_USE_INET_DGRAM_SOCKET] |
|
|
= "capability::use_inet_udp", |
|
|
[CCS_MAX_MAC_INDEX + CCS_USE_INET_RAW_SOCKET] |
|
|
= "capability::use_inet_ip", |
|
|
[CCS_MAX_MAC_INDEX + CCS_USE_ROUTE_SOCKET] |
|
|
= "capability::use_route", |
|
|
[CCS_MAX_MAC_INDEX + CCS_USE_PACKET_SOCKET] |
|
|
= "capability::use_packet", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_MOUNT] |
|
|
= "capability::SYS_MOUNT", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_UMOUNT] |
|
|
= "capability::SYS_UMOUNT", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_REBOOT] |
|
|
= "capability::SYS_REBOOT", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_CHROOT] |
|
|
= "capability::SYS_CHROOT", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_KILL] |
|
|
= "capability::SYS_KILL", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_VHANGUP] |
|
|
= "capability::SYS_VHANGUP", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_SETTIME] |
|
|
= "capability::SYS_TIME", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_NICE] |
|
|
= "capability::SYS_NICE", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_SETHOSTNAME] |
|
|
= "capability::SYS_SETHOSTNAME", |
|
|
[CCS_MAX_MAC_INDEX + CCS_USE_KERNEL_MODULE] |
|
|
= "capability::use_kernel_module", |
|
|
[CCS_MAX_MAC_INDEX + CCS_CREATE_FIFO] |
|
|
= "capability::create_fifo", |
|
|
[CCS_MAX_MAC_INDEX + CCS_CREATE_BLOCK_DEV] |
|
|
= "capability::create_block_dev", |
|
|
[CCS_MAX_MAC_INDEX + CCS_CREATE_CHAR_DEV] |
|
|
= "capability::create_char_dev", |
|
|
[CCS_MAX_MAC_INDEX + CCS_CREATE_UNIX_SOCKET] |
|
|
= "capability::create_unix_socket", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_LINK] |
|
|
= "capability::SYS_LINK", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_SYMLINK] |
|
|
= "capability::SYS_SYMLINK", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_RENAME] |
|
|
= "capability::SYS_RENAME", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_UNLINK] |
|
|
= "capability::SYS_UNLINK", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_CHMOD] |
|
|
= "capability::SYS_CHMOD", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_CHOWN] |
|
|
= "capability::SYS_CHOWN", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_IOCTL] |
|
|
= "capability::SYS_IOCTL", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_KEXEC_LOAD] |
|
|
= "capability::SYS_KEXEC_LOAD", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_PIVOT_ROOT] |
|
|
= "capability::SYS_PIVOT_ROOT", |
|
|
[CCS_MAX_MAC_INDEX + CCS_SYS_PTRACE] |
|
|
= "capability::SYS_PTRACE", |
|
|
[CCS_MAX_MAC_INDEX + CCS_CONCEAL_MOUNT] |
|
|
= "capability::conceal_mount", |
|
|
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
|
|
+ CCS_MAC_CATEGORY_FILE] = "file", |
|
|
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
|
|
+ CCS_MAC_CATEGORY_NETWORK] = "network", |
|
|
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
|
|
+ CCS_MAC_CATEGORY_MISC] = "misc", |
|
|
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
|
|
+ CCS_MAC_CATEGORY_IPC] = "ipc", |
|
|
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
|
|
+ CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
|
| 380 |
}; |
}; |
| 381 |
|
|
| 382 |
|
/***** SECTION3: Prototype definition section *****/ |
| 383 |
|
|
| 384 |
|
int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...); |
| 385 |
|
u8 ccs_get_config(const u8 profile, const u8 index); |
| 386 |
|
void ccs_transition_failed(const char *domainname); |
| 387 |
|
void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...); |
| 388 |
|
|
| 389 |
|
static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt, |
| 390 |
|
va_list args); |
| 391 |
|
static const char *ccs_yesno(const unsigned int value); |
| 392 |
|
static int ccs_poll_log(struct file *file, poll_table *wait); |
| 393 |
|
static void ccs_read_log(struct ccs_io_buffer *head); |
| 394 |
|
static void ccs_write_log2(struct ccs_request_info *r, int len, |
| 395 |
|
const char *fmt, va_list args); |
| 396 |
|
static bool ccs_get_audit(const u8 profile, const u8 index, |
| 397 |
|
const struct ccs_acl_info *matched_acl, |
| 398 |
|
const bool is_granted); |
| 399 |
|
static char *ccs_print_bprm(struct linux_binprm *bprm, |
| 400 |
|
struct ccs_page_dump *dump); |
| 401 |
|
static char *ccs_print_header(struct ccs_request_info *r); |
| 402 |
|
static char *ccs_read_token(struct ccs_acl_param *param); |
| 403 |
|
static void ccs_update_task_domain(struct ccs_request_info *r); |
| 404 |
|
|
| 405 |
|
static bool ccs_correct_domain(const unsigned char *domainname); |
| 406 |
|
static bool ccs_correct_path(const char *filename); |
| 407 |
|
static bool ccs_correct_word(const char *string); |
| 408 |
|
static bool ccs_correct_word2(const char *string, size_t len); |
| 409 |
|
static bool ccs_domain_def(const unsigned char *buffer); |
| 410 |
|
static bool ccs_domain_quota_ok(struct ccs_request_info *r); |
| 411 |
|
static bool ccs_flush(struct ccs_io_buffer *head); |
| 412 |
|
static bool ccs_has_more_namespace(struct ccs_io_buffer *head); |
| 413 |
|
static bool ccs_manager(void); |
| 414 |
|
static bool ccs_namespace_jump(const char *domainname); |
| 415 |
|
static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv); |
| 416 |
|
static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp); |
| 417 |
|
static bool ccs_parse_name_union(struct ccs_acl_param *param, |
| 418 |
|
struct ccs_name_union *ptr); |
| 419 |
|
static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param, |
| 420 |
|
struct ccs_name_union *ptr); |
| 421 |
|
static bool ccs_parse_number_union(struct ccs_acl_param *param, |
| 422 |
|
struct ccs_number_union *ptr); |
| 423 |
|
static bool ccs_permstr(const char *string, const char *keyword); |
| 424 |
|
static bool ccs_print_condition(struct ccs_io_buffer *head, |
| 425 |
|
const struct ccs_condition *cond); |
| 426 |
|
static bool ccs_print_entry(struct ccs_io_buffer *head, |
| 427 |
|
const struct ccs_acl_info *acl); |
| 428 |
|
static bool ccs_read_domain2(struct ccs_io_buffer *head, |
| 429 |
|
struct list_head *list); |
| 430 |
|
static bool ccs_read_group(struct ccs_io_buffer *head, const int idx); |
| 431 |
|
static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx); |
| 432 |
|
static bool ccs_same_condition(const struct ccs_condition *a, |
| 433 |
|
const struct ccs_condition *b); |
| 434 |
|
static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data); |
| 435 |
|
static bool ccs_set_lf(struct ccs_io_buffer *head); |
| 436 |
|
static bool ccs_str_starts(char **src, const char *find); |
| 437 |
|
static char *ccs_get_transit_preference(struct ccs_acl_param *param, |
| 438 |
|
struct ccs_condition *e); |
| 439 |
|
static const struct ccs_path_info *ccs_get_domainname |
| 440 |
|
(struct ccs_acl_param *param); |
| 441 |
|
static const struct ccs_path_info *ccs_get_dqword(char *start); |
| 442 |
|
static int __init ccs_init_module(void); |
| 443 |
|
static int ccs_delete_domain(char *domainname); |
| 444 |
|
static int ccs_open(struct inode *inode, struct file *file); |
| 445 |
|
static int ccs_parse_policy(struct ccs_io_buffer *head, char *line); |
| 446 |
|
static int ccs_poll_query(struct file *file, poll_table *wait); |
| 447 |
|
static int ccs_release(struct inode *inode, struct file *file); |
| 448 |
|
static int ccs_set_mode(char *name, const char *value, |
| 449 |
|
struct ccs_profile *profile); |
| 450 |
|
static int ccs_truncate(char *str); |
| 451 |
|
static int ccs_update_domain(const int size, struct ccs_acl_param *param); |
| 452 |
|
static int ccs_update_manager_entry(const char *manager, const bool is_delete); |
| 453 |
|
static int ccs_update_policy(const int size, struct ccs_acl_param *param); |
| 454 |
|
static int ccs_write_aggregator(struct ccs_acl_param *param); |
| 455 |
|
static int ccs_write_answer(struct ccs_io_buffer *head); |
| 456 |
|
static int ccs_write_domain(struct ccs_io_buffer *head); |
| 457 |
|
static int ccs_write_domain2(struct ccs_policy_namespace *ns, |
| 458 |
|
struct list_head *list, char *data, |
| 459 |
|
const bool is_delete); |
| 460 |
|
static int ccs_write_exception(struct ccs_io_buffer *head); |
| 461 |
|
static int ccs_write_file(struct ccs_acl_param *param); |
| 462 |
|
static int ccs_write_group(struct ccs_acl_param *param, const u8 type); |
| 463 |
|
static int ccs_write_manager(struct ccs_io_buffer *head); |
| 464 |
|
static int ccs_write_misc(struct ccs_acl_param *param); |
| 465 |
|
static int ccs_write_pid(struct ccs_io_buffer *head); |
| 466 |
|
static int ccs_write_profile(struct ccs_io_buffer *head); |
| 467 |
|
static int ccs_write_stat(struct ccs_io_buffer *head); |
| 468 |
|
static int ccs_write_task(struct ccs_acl_param *param); |
| 469 |
|
static int ccs_write_transition_control(struct ccs_acl_param *param, |
| 470 |
|
const u8 type); |
| 471 |
|
static s8 ccs_find_yesno(const char *string, const char *find); |
| 472 |
|
static ssize_t ccs_read(struct file *file, char __user *buf, size_t count, |
| 473 |
|
loff_t *ppos); |
| 474 |
|
static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count, |
| 475 |
|
loff_t *ppos); |
| 476 |
|
static ssize_t ccs_write(struct file *file, const char __user *buf, |
| 477 |
|
size_t count, loff_t *ppos); |
| 478 |
|
static ssize_t ccs_write_self(struct file *file, const char __user *buf, |
| 479 |
|
size_t count, loff_t *ppos); |
| 480 |
|
static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry); |
| 481 |
|
static struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param); |
| 482 |
|
static struct ccs_domain_info *ccs_find_domain(const char *domainname); |
| 483 |
|
static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial); |
| 484 |
|
static struct ccs_group *ccs_get_group(struct ccs_acl_param *param, |
| 485 |
|
const u8 idx); |
| 486 |
|
static struct ccs_policy_namespace *ccs_assign_namespace |
| 487 |
|
(const char *domainname); |
| 488 |
|
static struct ccs_policy_namespace *ccs_find_namespace(const char *name, |
| 489 |
|
const unsigned int len); |
| 490 |
|
static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns, |
| 491 |
|
const unsigned int profile); |
| 492 |
|
static struct ccs_profile *ccs_profile(const u8 profile); |
| 493 |
|
static u8 ccs_condition_type(const char *word); |
| 494 |
|
static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3); |
| 495 |
|
static u8 ccs_parse_ulong(unsigned long *result, char **str); |
| 496 |
|
static unsigned int ccs_poll(struct file *file, poll_table *wait); |
| 497 |
|
static void __init ccs_create_entry(const char *name, const mode_t mode, |
| 498 |
|
struct proc_dir_entry *parent, |
| 499 |
|
const u8 key); |
| 500 |
|
static void __init ccs_load_builtin_policy(void); |
| 501 |
|
static void __init ccs_policy_io_init(void); |
| 502 |
|
static void __init ccs_proc_init(void); |
| 503 |
|
static void ccs_add_entry(char *header); |
| 504 |
|
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
| 505 |
|
__printf(3, 4); |
| 506 |
|
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...); |
| 507 |
|
static void ccs_check_profile(void); |
| 508 |
|
static void ccs_convert_time(time_t time, struct ccs_time *stamp); |
| 509 |
|
static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns); |
| 510 |
|
static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
| 511 |
|
__printf(2, 3); |
| 512 |
|
static void ccs_normalize_line(unsigned char *buffer); |
| 513 |
|
static void ccs_print_config(struct ccs_io_buffer *head, const u8 config); |
| 514 |
|
static void ccs_print_name_union(struct ccs_io_buffer *head, |
| 515 |
|
const struct ccs_name_union *ptr); |
| 516 |
|
static void ccs_print_name_union_quoted(struct ccs_io_buffer *head, |
| 517 |
|
const struct ccs_name_union *ptr); |
| 518 |
|
static void ccs_print_namespace(struct ccs_io_buffer *head); |
| 519 |
|
static void ccs_print_number_union(struct ccs_io_buffer *head, |
| 520 |
|
const struct ccs_number_union *ptr); |
| 521 |
|
static void ccs_print_number_union_nospace(struct ccs_io_buffer *head, |
| 522 |
|
const struct ccs_number_union *ptr); |
| 523 |
|
static void ccs_read_domain(struct ccs_io_buffer *head); |
| 524 |
|
static void ccs_read_exception(struct ccs_io_buffer *head); |
| 525 |
|
static void ccs_read_manager(struct ccs_io_buffer *head); |
| 526 |
|
static void ccs_read_pid(struct ccs_io_buffer *head); |
| 527 |
|
static void ccs_read_profile(struct ccs_io_buffer *head); |
| 528 |
|
static void ccs_read_query(struct ccs_io_buffer *head); |
| 529 |
|
static void ccs_read_stat(struct ccs_io_buffer *head); |
| 530 |
|
static void ccs_read_version(struct ccs_io_buffer *head); |
| 531 |
|
static void ccs_set_group(struct ccs_io_buffer *head, const char *category); |
| 532 |
|
static void ccs_set_namespace_cursor(struct ccs_io_buffer *head); |
| 533 |
|
static void ccs_set_slash(struct ccs_io_buffer *head); |
| 534 |
|
static void ccs_set_space(struct ccs_io_buffer *head); |
| 535 |
|
static void ccs_set_string(struct ccs_io_buffer *head, const char *string); |
| 536 |
|
static void ccs_set_uint(unsigned int *i, const char *string, |
| 537 |
|
const char *find); |
| 538 |
|
static void ccs_update_stat(const u8 index); |
| 539 |
|
|
| 540 |
|
#ifdef CONFIG_CCSECURITY_PORTRESERVE |
| 541 |
|
static bool __ccs_lport_reserved(const u16 port); |
| 542 |
|
static int ccs_write_reserved_port(struct ccs_acl_param *param); |
| 543 |
|
#endif |
| 544 |
|
|
| 545 |
|
#ifdef CONFIG_CCSECURITY_NETWORK |
| 546 |
|
static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param, |
| 547 |
|
struct ccs_ipaddr_union *ptr); |
| 548 |
|
static int ccs_write_inet_network(struct ccs_acl_param *param); |
| 549 |
|
static int ccs_write_unix_network(struct ccs_acl_param *param); |
| 550 |
|
static void ccs_print_ip(char *buf, const unsigned int size, |
| 551 |
|
const struct ccs_ipaddr_union *ptr); |
| 552 |
|
#endif |
| 553 |
|
|
| 554 |
|
#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 555 |
|
static int ccs_write_capability(struct ccs_acl_param *param); |
| 556 |
|
#endif |
| 557 |
|
|
| 558 |
|
#ifdef CONFIG_CCSECURITY_IPC |
| 559 |
|
static int ccs_write_ipc(struct ccs_acl_param *param); |
| 560 |
|
#endif |
| 561 |
|
|
| 562 |
|
/***** SECTION4: Standalone functions section *****/ |
| 563 |
|
|
| 564 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) |
| 565 |
|
|
| 566 |
|
/** |
| 567 |
|
* fatal_signal_pending - Check whether SIGKILL is pending or not. |
| 568 |
|
* |
| 569 |
|
* @p: Pointer to "struct task_struct". |
| 570 |
|
* |
| 571 |
|
* Returns true if SIGKILL is pending on @p, false otherwise. |
| 572 |
|
* |
| 573 |
|
* This is for compatibility with older kernels. |
| 574 |
|
*/ |
| 575 |
|
#define fatal_signal_pending(p) (signal_pending(p) && \ |
| 576 |
|
sigismember(&p->pending.signal, SIGKILL)) |
| 577 |
|
|
| 578 |
|
#endif |
| 579 |
|
|
| 580 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 581 |
|
|
| 582 |
|
/** |
| 583 |
|
* __wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
| 584 |
|
* |
| 585 |
|
* @wq: The waitqueue to wait on. |
| 586 |
|
* @condition: A C expression for the event to wait for. |
| 587 |
|
* @ret: Timeout, in jiffies. |
| 588 |
|
* |
| 589 |
|
* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
| 590 |
|
* signal, and the remaining jiffies otherwise if the condition evaluated to |
| 591 |
|
* true before the timeout elapsed. |
| 592 |
|
* |
| 593 |
|
* This is for compatibility with older kernels. |
| 594 |
|
*/ |
| 595 |
|
#define __wait_event_interruptible_timeout(wq, condition, ret) \ |
| 596 |
|
do { \ |
| 597 |
|
wait_queue_t __wait; \ |
| 598 |
|
init_waitqueue_entry(&__wait, current); \ |
| 599 |
|
\ |
| 600 |
|
add_wait_queue(&wq, &__wait); \ |
| 601 |
|
for (;;) { \ |
| 602 |
|
set_current_state(TASK_INTERRUPTIBLE); \ |
| 603 |
|
if (condition) \ |
| 604 |
|
break; \ |
| 605 |
|
if (!signal_pending(current)) { \ |
| 606 |
|
ret = schedule_timeout(ret); \ |
| 607 |
|
if (!ret) \ |
| 608 |
|
break; \ |
| 609 |
|
continue; \ |
| 610 |
|
} \ |
| 611 |
|
ret = -ERESTARTSYS; \ |
| 612 |
|
break; \ |
| 613 |
|
} \ |
| 614 |
|
current->state = TASK_RUNNING; \ |
| 615 |
|
remove_wait_queue(&wq, &__wait); \ |
| 616 |
|
} while (0) |
| 617 |
|
|
| 618 |
|
/** |
| 619 |
|
* wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
| 620 |
|
* |
| 621 |
|
* @wq: The waitqueue to wait on. |
| 622 |
|
* @condition: A C expression for the event to wait for. |
| 623 |
|
* @timeout: Timeout, in jiffies. |
| 624 |
|
* |
| 625 |
|
* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
| 626 |
|
* signal, and the remaining jiffies otherwise if the condition evaluated to |
| 627 |
|
* true before the timeout elapsed. |
| 628 |
|
* |
| 629 |
|
* This is for compatibility with older kernels. |
| 630 |
|
*/ |
| 631 |
|
#define wait_event_interruptible_timeout(wq, condition, timeout) \ |
| 632 |
|
({ \ |
| 633 |
|
long __ret = timeout; \ |
| 634 |
|
if (!(condition)) \ |
| 635 |
|
__wait_event_interruptible_timeout(wq, condition, __ret); \ |
| 636 |
|
__ret; \ |
| 637 |
|
}) |
| 638 |
|
|
| 639 |
|
#endif |
| 640 |
|
|
| 641 |
|
/** |
| 642 |
|
* ccs_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss. |
| 643 |
|
* |
| 644 |
|
* @time: Seconds since 1970/01/01 00:00:00. |
| 645 |
|
* @stamp: Pointer to "struct ccs_time". |
| 646 |
|
* |
| 647 |
|
* Returns nothing. |
| 648 |
|
* |
| 649 |
|
* This function does not handle Y2038 problem. |
| 650 |
|
*/ |
| 651 |
|
static void ccs_convert_time(time_t time, struct ccs_time *stamp) |
| 652 |
|
{ |
| 653 |
|
static const u16 ccs_eom[2][12] = { |
| 654 |
|
{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
| 655 |
|
{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
| 656 |
|
}; |
| 657 |
|
u16 y; |
| 658 |
|
u8 m; |
| 659 |
|
bool r; |
| 660 |
|
stamp->sec = time % 60; |
| 661 |
|
time /= 60; |
| 662 |
|
stamp->min = time % 60; |
| 663 |
|
time /= 60; |
| 664 |
|
stamp->hour = time % 24; |
| 665 |
|
time /= 24; |
| 666 |
|
for (y = 1970; ; y++) { |
| 667 |
|
const unsigned short days = (y & 3) ? 365 : 366; |
| 668 |
|
if (time < days) |
| 669 |
|
break; |
| 670 |
|
time -= days; |
| 671 |
|
} |
| 672 |
|
r = (y & 3) == 0; |
| 673 |
|
for (m = 0; m < 11 && time >= ccs_eom[r][m]; m++); |
| 674 |
|
if (m) |
| 675 |
|
time -= ccs_eom[r][m - 1]; |
| 676 |
|
stamp->year = y; |
| 677 |
|
stamp->month = ++m; |
| 678 |
|
stamp->day = ++time; |
| 679 |
|
} |
| 680 |
|
|
| 681 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 23) |
| 682 |
|
#if !defined(RHEL_VERSION) || RHEL_VERSION != 3 |
| 683 |
|
|
| 684 |
|
/** |
| 685 |
|
* PDE - Get "struct proc_dir_entry". |
| 686 |
|
* |
| 687 |
|
* @inode: Pointer to "struct inode". |
| 688 |
|
* |
| 689 |
|
* Returns pointer to "struct proc_dir_entry". |
| 690 |
|
* |
| 691 |
|
* This is for compatibility with older kernels. |
| 692 |
|
*/ |
| 693 |
|
static inline struct proc_dir_entry *PDE(const struct inode *inode) |
| 694 |
|
{ |
| 695 |
|
return (struct proc_dir_entry *) inode->u.generic_ip; |
| 696 |
|
} |
| 697 |
|
|
| 698 |
|
#endif |
| 699 |
|
#endif |
| 700 |
|
|
| 701 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 702 |
|
|
| 703 |
|
/** |
| 704 |
|
* proc_notify_change - Update inode's attributes and reflect to the dentry. |
| 705 |
|
* |
| 706 |
|
* @dentry: Pointer to "struct dentry". |
| 707 |
|
* @iattr: Pointer to "struct iattr". |
| 708 |
|
* |
| 709 |
|
* Returns 0 on success, negative value otherwise. |
| 710 |
|
* |
| 711 |
|
* The 2.4 kernels don't allow chmod()/chown() for files in /proc, |
| 712 |
|
* while the 2.6 kernels allow. |
| 713 |
|
* To permit management of /proc/ccs/ interface by non-root user, |
| 714 |
|
* I modified to allow chmod()/chown() of /proc/ccs/ interface like 2.6 kernels |
| 715 |
|
* by adding "struct inode_operations"->setattr hook. |
| 716 |
|
*/ |
| 717 |
|
static int proc_notify_change(struct dentry *dentry, struct iattr *iattr) |
| 718 |
|
{ |
| 719 |
|
struct inode *inode = dentry->d_inode; |
| 720 |
|
struct proc_dir_entry *de = PDE(inode); |
| 721 |
|
int error; |
| 722 |
|
|
| 723 |
|
error = inode_change_ok(inode, iattr); |
| 724 |
|
if (error) |
| 725 |
|
goto out; |
| 726 |
|
|
| 727 |
|
error = inode_setattr(inode, iattr); |
| 728 |
|
if (error) |
| 729 |
|
goto out; |
| 730 |
|
|
| 731 |
|
de->uid = inode->i_uid; |
| 732 |
|
de->gid = inode->i_gid; |
| 733 |
|
de->mode = inode->i_mode; |
| 734 |
|
out: |
| 735 |
|
return error; |
| 736 |
|
} |
| 737 |
|
|
| 738 |
|
#endif |
| 739 |
|
|
| 740 |
|
#ifdef CONFIG_CCSECURITY_NETWORK |
| 741 |
|
|
| 742 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) && defined(CONFIG_NET) |
| 743 |
|
#define ccs_in4_pton in4_pton |
| 744 |
|
#define ccs_in6_pton in6_pton |
| 745 |
|
#else |
| 746 |
|
/* |
| 747 |
|
* Routines for parsing IPv4 or IPv6 address. |
| 748 |
|
* These are copied from lib/hexdump.c net/core/utils.c . |
| 749 |
|
*/ |
| 750 |
|
#include <linux/ctype.h> |
| 751 |
|
|
| 752 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35) |
| 753 |
|
static int hex_to_bin(char ch) |
| 754 |
|
{ |
| 755 |
|
if ((ch >= '0') && (ch <= '9')) |
| 756 |
|
return ch - '0'; |
| 757 |
|
ch = tolower(ch); |
| 758 |
|
if ((ch >= 'a') && (ch <= 'f')) |
| 759 |
|
return ch - 'a' + 10; |
| 760 |
|
return -1; |
| 761 |
|
} |
| 762 |
|
#endif |
| 763 |
|
|
| 764 |
|
#define IN6PTON_XDIGIT 0x00010000 |
| 765 |
|
#define IN6PTON_DIGIT 0x00020000 |
| 766 |
|
#define IN6PTON_COLON_MASK 0x00700000 |
| 767 |
|
#define IN6PTON_COLON_1 0x00100000 /* single : requested */ |
| 768 |
|
#define IN6PTON_COLON_2 0x00200000 /* second : requested */ |
| 769 |
|
#define IN6PTON_COLON_1_2 0x00400000 /* :: requested */ |
| 770 |
|
#define IN6PTON_DOT 0x00800000 /* . */ |
| 771 |
|
#define IN6PTON_DELIM 0x10000000 |
| 772 |
|
#define IN6PTON_NULL 0x20000000 /* first/tail */ |
| 773 |
|
#define IN6PTON_UNKNOWN 0x40000000 |
| 774 |
|
|
| 775 |
|
static inline int xdigit2bin(char c, int delim) |
| 776 |
|
{ |
| 777 |
|
int val; |
| 778 |
|
|
| 779 |
|
if (c == delim || c == '\0') |
| 780 |
|
return IN6PTON_DELIM; |
| 781 |
|
if (c == ':') |
| 782 |
|
return IN6PTON_COLON_MASK; |
| 783 |
|
if (c == '.') |
| 784 |
|
return IN6PTON_DOT; |
| 785 |
|
|
| 786 |
|
val = hex_to_bin(c); |
| 787 |
|
if (val >= 0) |
| 788 |
|
return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0); |
| 789 |
|
|
| 790 |
|
if (delim == -1) |
| 791 |
|
return IN6PTON_DELIM; |
| 792 |
|
return IN6PTON_UNKNOWN; |
| 793 |
|
} |
| 794 |
|
|
| 795 |
|
static int ccs_in4_pton(const char *src, int srclen, u8 *dst, int delim, |
| 796 |
|
const char **end) |
| 797 |
|
{ |
| 798 |
|
const char *s; |
| 799 |
|
u8 *d; |
| 800 |
|
u8 dbuf[4]; |
| 801 |
|
int ret = 0; |
| 802 |
|
int i; |
| 803 |
|
int w = 0; |
| 804 |
|
|
| 805 |
|
if (srclen < 0) |
| 806 |
|
srclen = strlen(src); |
| 807 |
|
s = src; |
| 808 |
|
d = dbuf; |
| 809 |
|
i = 0; |
| 810 |
|
while (1) { |
| 811 |
|
int c; |
| 812 |
|
c = xdigit2bin(srclen > 0 ? *s : '\0', delim); |
| 813 |
|
if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM | |
| 814 |
|
IN6PTON_COLON_MASK))) |
| 815 |
|
goto out; |
| 816 |
|
if (c & (IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 817 |
|
if (w == 0) |
| 818 |
|
goto out; |
| 819 |
|
*d++ = w & 0xff; |
| 820 |
|
w = 0; |
| 821 |
|
i++; |
| 822 |
|
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 823 |
|
if (i != 4) |
| 824 |
|
goto out; |
| 825 |
|
break; |
| 826 |
|
} |
| 827 |
|
goto cont; |
| 828 |
|
} |
| 829 |
|
w = (w * 10) + c; |
| 830 |
|
if ((w & 0xffff) > 255) |
| 831 |
|
goto out; |
| 832 |
|
cont: |
| 833 |
|
if (i >= 4) |
| 834 |
|
goto out; |
| 835 |
|
s++; |
| 836 |
|
srclen--; |
| 837 |
|
} |
| 838 |
|
ret = 1; |
| 839 |
|
memcpy(dst, dbuf, sizeof(dbuf)); |
| 840 |
|
out: |
| 841 |
|
if (end) |
| 842 |
|
*end = s; |
| 843 |
|
return ret; |
| 844 |
|
} |
| 845 |
|
|
| 846 |
|
static int ccs_in6_pton(const char *src, int srclen, u8 *dst, int delim, |
| 847 |
|
const char **end) |
| 848 |
|
{ |
| 849 |
|
const char *s, *tok = NULL; |
| 850 |
|
u8 *d, *dc = NULL; |
| 851 |
|
u8 dbuf[16]; |
| 852 |
|
int ret = 0; |
| 853 |
|
int i; |
| 854 |
|
int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL; |
| 855 |
|
int w = 0; |
| 856 |
|
|
| 857 |
|
memset(dbuf, 0, sizeof(dbuf)); |
| 858 |
|
|
| 859 |
|
s = src; |
| 860 |
|
d = dbuf; |
| 861 |
|
if (srclen < 0) |
| 862 |
|
srclen = strlen(src); |
| 863 |
|
|
| 864 |
|
while (1) { |
| 865 |
|
int c; |
| 866 |
|
|
| 867 |
|
c = xdigit2bin(srclen > 0 ? *s : '\0', delim); |
| 868 |
|
if (!(c & state)) |
| 869 |
|
goto out; |
| 870 |
|
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 871 |
|
/* process one 16-bit word */ |
| 872 |
|
if (!(state & IN6PTON_NULL)) { |
| 873 |
|
*d++ = (w >> 8) & 0xff; |
| 874 |
|
*d++ = w & 0xff; |
| 875 |
|
} |
| 876 |
|
w = 0; |
| 877 |
|
if (c & IN6PTON_DELIM) { |
| 878 |
|
/* We've processed last word */ |
| 879 |
|
break; |
| 880 |
|
} |
| 881 |
|
/* |
| 882 |
|
* COLON_1 => XDIGIT |
| 883 |
|
* COLON_2 => XDIGIT|DELIM |
| 884 |
|
* COLON_1_2 => COLON_2 |
| 885 |
|
*/ |
| 886 |
|
switch (state & IN6PTON_COLON_MASK) { |
| 887 |
|
case IN6PTON_COLON_2: |
| 888 |
|
dc = d; |
| 889 |
|
state = IN6PTON_XDIGIT | IN6PTON_DELIM; |
| 890 |
|
if (dc - dbuf >= sizeof(dbuf)) |
| 891 |
|
state |= IN6PTON_NULL; |
| 892 |
|
break; |
| 893 |
|
case IN6PTON_COLON_1|IN6PTON_COLON_1_2: |
| 894 |
|
state = IN6PTON_XDIGIT | IN6PTON_COLON_2; |
| 895 |
|
break; |
| 896 |
|
case IN6PTON_COLON_1: |
| 897 |
|
state = IN6PTON_XDIGIT; |
| 898 |
|
break; |
| 899 |
|
case IN6PTON_COLON_1_2: |
| 900 |
|
state = IN6PTON_COLON_2; |
| 901 |
|
break; |
| 902 |
|
default: |
| 903 |
|
state = 0; |
| 904 |
|
} |
| 905 |
|
tok = s + 1; |
| 906 |
|
goto cont; |
| 907 |
|
} |
| 908 |
|
|
| 909 |
|
if (c & IN6PTON_DOT) { |
| 910 |
|
ret = ccs_in4_pton(tok ? tok : s, srclen + |
| 911 |
|
(int)(s - tok), d, delim, &s); |
| 912 |
|
if (ret > 0) { |
| 913 |
|
d += 4; |
| 914 |
|
break; |
| 915 |
|
} |
| 916 |
|
goto out; |
| 917 |
|
} |
| 918 |
|
|
| 919 |
|
w = (w << 4) | (0xff & c); |
| 920 |
|
state = IN6PTON_COLON_1 | IN6PTON_DELIM; |
| 921 |
|
if (!(w & 0xf000)) |
| 922 |
|
state |= IN6PTON_XDIGIT; |
| 923 |
|
if (!dc && d + 2 < dbuf + sizeof(dbuf)) { |
| 924 |
|
state |= IN6PTON_COLON_1_2; |
| 925 |
|
state &= ~IN6PTON_DELIM; |
| 926 |
|
} |
| 927 |
|
if (d + 2 >= dbuf + sizeof(dbuf)) |
| 928 |
|
state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2); |
| 929 |
|
cont: |
| 930 |
|
if ((dc && d + 4 < dbuf + sizeof(dbuf)) || |
| 931 |
|
d + 4 == dbuf + sizeof(dbuf)) |
| 932 |
|
state |= IN6PTON_DOT; |
| 933 |
|
if (d >= dbuf + sizeof(dbuf)) |
| 934 |
|
state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK); |
| 935 |
|
s++; |
| 936 |
|
srclen--; |
| 937 |
|
} |
| 938 |
|
|
| 939 |
|
i = 15; d--; |
| 940 |
|
|
| 941 |
|
if (dc) { |
| 942 |
|
while (d >= dc) |
| 943 |
|
dst[i--] = *d--; |
| 944 |
|
while (i >= dc - dbuf) |
| 945 |
|
dst[i--] = 0; |
| 946 |
|
while (i >= 0) |
| 947 |
|
dst[i--] = *d--; |
| 948 |
|
} else |
| 949 |
|
memcpy(dst, dbuf, sizeof(dbuf)); |
| 950 |
|
|
| 951 |
|
ret = 1; |
| 952 |
|
out: |
| 953 |
|
if (end) |
| 954 |
|
*end = s; |
| 955 |
|
return ret; |
| 956 |
|
} |
| 957 |
|
#endif |
| 958 |
|
|
| 959 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32) |
| 960 |
|
|
| 961 |
|
/* |
| 962 |
|
* Routines for printing IPv4 or IPv6 address. |
| 963 |
|
* These are copied from include/linux/kernel.h include/net/ipv6.h |
| 964 |
|
* include/net/addrconf.h lib/hexdump.c lib/vsprintf.c and simplified. |
| 965 |
|
*/ |
| 966 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26) |
| 967 |
|
static const char hex_asc[] = "0123456789abcdef"; |
| 968 |
|
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
| 969 |
|
#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] |
| 970 |
|
|
| 971 |
|
static inline char *pack_hex_byte(char *buf, u8 byte) |
| 972 |
|
{ |
| 973 |
|
*buf++ = hex_asc_hi(byte); |
| 974 |
|
*buf++ = hex_asc_lo(byte); |
| 975 |
|
return buf; |
| 976 |
|
} |
| 977 |
|
#endif |
| 978 |
|
|
| 979 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) |
| 980 |
|
static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
| 981 |
|
{ |
| 982 |
|
return (a->s6_addr32[0] | a->s6_addr32[1] | |
| 983 |
|
(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; |
| 984 |
|
} |
| 985 |
|
#endif |
| 986 |
|
|
| 987 |
|
static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) |
| 988 |
|
{ |
| 989 |
|
return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
| 990 |
|
} |
| 991 |
|
|
| 992 |
|
static char *ip4_string(char *p, const u8 *addr) |
| 993 |
|
{ |
| 994 |
|
/* |
| 995 |
|
* Since this function is called outside vsnprintf(), I can use |
| 996 |
|
* sprintf() here. |
| 997 |
|
*/ |
| 998 |
|
return p + |
| 999 |
|
sprintf(p, "%u.%u.%u.%u", addr[0], addr[1], addr[2], addr[3]); |
| 1000 |
|
} |
| 1001 |
|
|
| 1002 |
|
static char *ip6_compressed_string(char *p, const char *addr) |
| 1003 |
|
{ |
| 1004 |
|
int i, j, range; |
| 1005 |
|
unsigned char zerolength[8]; |
| 1006 |
|
int longest = 1; |
| 1007 |
|
int colonpos = -1; |
| 1008 |
|
u16 word; |
| 1009 |
|
u8 hi, lo; |
| 1010 |
|
bool needcolon = false; |
| 1011 |
|
bool useIPv4; |
| 1012 |
|
struct in6_addr in6; |
| 1013 |
|
|
| 1014 |
|
memcpy(&in6, addr, sizeof(struct in6_addr)); |
| 1015 |
|
|
| 1016 |
|
useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
| 1017 |
|
|
| 1018 |
|
memset(zerolength, 0, sizeof(zerolength)); |
| 1019 |
|
|
| 1020 |
|
if (useIPv4) |
| 1021 |
|
range = 6; |
| 1022 |
|
else |
| 1023 |
|
range = 8; |
| 1024 |
|
|
| 1025 |
|
/* find position of longest 0 run */ |
| 1026 |
|
for (i = 0; i < range; i++) { |
| 1027 |
|
for (j = i; j < range; j++) { |
| 1028 |
|
if (in6.s6_addr16[j] != 0) |
| 1029 |
|
break; |
| 1030 |
|
zerolength[i]++; |
| 1031 |
|
} |
| 1032 |
|
} |
| 1033 |
|
for (i = 0; i < range; i++) { |
| 1034 |
|
if (zerolength[i] > longest) { |
| 1035 |
|
longest = zerolength[i]; |
| 1036 |
|
colonpos = i; |
| 1037 |
|
} |
| 1038 |
|
} |
| 1039 |
|
if (longest == 1) /* don't compress a single 0 */ |
| 1040 |
|
colonpos = -1; |
| 1041 |
|
|
| 1042 |
|
/* emit address */ |
| 1043 |
|
for (i = 0; i < range; i++) { |
| 1044 |
|
if (i == colonpos) { |
| 1045 |
|
if (needcolon || i == 0) |
| 1046 |
|
*p++ = ':'; |
| 1047 |
|
*p++ = ':'; |
| 1048 |
|
needcolon = false; |
| 1049 |
|
i += longest - 1; |
| 1050 |
|
continue; |
| 1051 |
|
} |
| 1052 |
|
if (needcolon) { |
| 1053 |
|
*p++ = ':'; |
| 1054 |
|
needcolon = false; |
| 1055 |
|
} |
| 1056 |
|
/* hex u16 without leading 0s */ |
| 1057 |
|
word = ntohs(in6.s6_addr16[i]); |
| 1058 |
|
hi = word >> 8; |
| 1059 |
|
lo = word & 0xff; |
| 1060 |
|
if (hi) { |
| 1061 |
|
if (hi > 0x0f) |
| 1062 |
|
p = pack_hex_byte(p, hi); |
| 1063 |
|
else |
| 1064 |
|
*p++ = hex_asc_lo(hi); |
| 1065 |
|
p = pack_hex_byte(p, lo); |
| 1066 |
|
} else if (lo > 0x0f) |
| 1067 |
|
p = pack_hex_byte(p, lo); |
| 1068 |
|
else |
| 1069 |
|
*p++ = hex_asc_lo(lo); |
| 1070 |
|
needcolon = true; |
| 1071 |
|
} |
| 1072 |
|
|
| 1073 |
|
if (useIPv4) { |
| 1074 |
|
if (needcolon) |
| 1075 |
|
*p++ = ':'; |
| 1076 |
|
p = ip4_string(p, &in6.s6_addr[12]); |
| 1077 |
|
} |
| 1078 |
|
*p = '\0'; |
| 1079 |
|
|
| 1080 |
|
return p; |
| 1081 |
|
} |
| 1082 |
|
#endif |
| 1083 |
|
|
| 1084 |
|
/** |
| 1085 |
|
* ccs_print_ipv4 - Print an IPv4 address. |
| 1086 |
|
* |
| 1087 |
|
* @buffer: Buffer to write to. |
| 1088 |
|
* @buffer_len: Size of @buffer. |
| 1089 |
|
* @ip: Pointer to "u32 in network byte order". |
| 1090 |
|
* |
| 1091 |
|
* Returns written length. |
| 1092 |
|
*/ |
| 1093 |
|
int ccs_print_ipv4(char *buffer, const unsigned int buffer_len, const u32 *ip) |
| 1094 |
|
{ |
| 1095 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32) |
| 1096 |
|
return snprintf(buffer, buffer_len, "%pI4", ip); |
| 1097 |
|
#else |
| 1098 |
|
char addr[sizeof("255.255.255.255")]; |
| 1099 |
|
ip4_string(addr, (const u8 *) ip); |
| 1100 |
|
return snprintf(buffer, buffer_len, "%s", addr); |
| 1101 |
|
#endif |
| 1102 |
|
} |
| 1103 |
|
|
| 1104 |
|
/** |
| 1105 |
|
* ccs_print_ipv6 - Print an IPv6 address. |
| 1106 |
|
* |
| 1107 |
|
* @buffer: Buffer to write to. |
| 1108 |
|
* @buffer_len: Size of @buffer. |
| 1109 |
|
* @ip: Pointer to "struct in6_addr". |
| 1110 |
|
* |
| 1111 |
|
* Returns written length. |
| 1112 |
|
*/ |
| 1113 |
|
int ccs_print_ipv6(char *buffer, const unsigned int buffer_len, |
| 1114 |
|
const struct in6_addr *ip) |
| 1115 |
|
{ |
| 1116 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32) |
| 1117 |
|
return snprintf(buffer, buffer_len, "%pI6c", ip); |
| 1118 |
|
#else |
| 1119 |
|
char addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; |
| 1120 |
|
ip6_compressed_string(addr, (const u8 *) ip); |
| 1121 |
|
return snprintf(buffer, buffer_len, "%s", addr); |
| 1122 |
|
#endif |
| 1123 |
|
} |
| 1124 |
|
|
| 1125 |
|
#endif |
| 1126 |
|
|
| 1127 |
|
/***** SECTION5: Variables definition section *****/ |
| 1128 |
|
|
| 1129 |
/* Permit policy management by non-root user? */ |
/* Permit policy management by non-root user? */ |
| 1130 |
static bool ccs_manage_by_non_root; |
static bool ccs_manage_by_non_root; |
| 1131 |
|
|
| 1132 |
|
/* Lock for protecting policy. */ |
| 1133 |
|
DEFINE_MUTEX(ccs_policy_lock); |
| 1134 |
|
|
| 1135 |
|
/* Has /sbin/init started? */ |
| 1136 |
|
bool ccs_policy_loaded; |
| 1137 |
|
|
| 1138 |
|
/* List of namespaces. */ |
| 1139 |
|
LIST_HEAD(ccs_namespace_list); |
| 1140 |
|
/* True if namespace other than ccs_kernel_namespace is defined. */ |
| 1141 |
|
static bool ccs_namespace_enabled; |
| 1142 |
|
|
| 1143 |
|
/* Initial namespace.*/ |
| 1144 |
|
static struct ccs_policy_namespace ccs_kernel_namespace; |
| 1145 |
|
|
| 1146 |
|
/* List of "struct ccs_condition". */ |
| 1147 |
|
LIST_HEAD(ccs_condition_list); |
| 1148 |
|
|
| 1149 |
|
#ifdef CONFIG_CCSECURITY_PORTRESERVE |
| 1150 |
|
/* Bitmap for reserved local port numbers.*/ |
| 1151 |
|
static u8 ccs_reserved_port_map[8192]; |
| 1152 |
|
#endif |
| 1153 |
|
|
| 1154 |
|
/* Wait queue for kernel -> userspace notification. */ |
| 1155 |
|
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
| 1156 |
|
/* Wait queue for userspace -> kernel notification. */ |
| 1157 |
|
static DECLARE_WAIT_QUEUE_HEAD(ccs_answer_wait); |
| 1158 |
|
|
| 1159 |
|
/* The list for "struct ccs_query". */ |
| 1160 |
|
static LIST_HEAD(ccs_query_list); |
| 1161 |
|
|
| 1162 |
|
/* Lock for manipulating ccs_query_list. */ |
| 1163 |
|
static DEFINE_SPINLOCK(ccs_query_list_lock); |
| 1164 |
|
|
| 1165 |
|
/* Number of "struct file" referring /proc/ccs/query interface. */ |
| 1166 |
|
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
| 1167 |
|
|
| 1168 |
|
/* Wait queue for /proc/ccs/audit. */ |
| 1169 |
|
static DECLARE_WAIT_QUEUE_HEAD(ccs_log_wait); |
| 1170 |
|
|
| 1171 |
|
/* The list for "struct ccs_log". */ |
| 1172 |
|
static LIST_HEAD(ccs_log); |
| 1173 |
|
|
| 1174 |
|
/* Lock for "struct list_head ccs_log". */ |
| 1175 |
|
static DEFINE_SPINLOCK(ccs_log_lock); |
| 1176 |
|
|
| 1177 |
|
/* Length of "stuct list_head ccs_log". */ |
| 1178 |
|
static unsigned int ccs_log_count; |
| 1179 |
|
|
| 1180 |
|
/* Timestamp counter for last updated. */ |
| 1181 |
|
static unsigned int ccs_stat_updated[CCS_MAX_POLICY_STAT]; |
| 1182 |
|
|
| 1183 |
|
/* Counter for number of updates. */ |
| 1184 |
|
static unsigned int ccs_stat_modified[CCS_MAX_POLICY_STAT]; |
| 1185 |
|
|
| 1186 |
|
/* Operations for /proc/ccs/self_domain interface. */ |
| 1187 |
|
static |
| 1188 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17) |
| 1189 |
|
const |
| 1190 |
|
#endif |
| 1191 |
|
struct file_operations ccs_self_operations = { |
| 1192 |
|
.write = ccs_write_self, |
| 1193 |
|
.read = ccs_read_self, |
| 1194 |
|
}; |
| 1195 |
|
|
| 1196 |
|
/* Operations for /proc/ccs/ interface. */ |
| 1197 |
|
static |
| 1198 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17) |
| 1199 |
|
const |
| 1200 |
|
#endif |
| 1201 |
|
struct file_operations ccs_operations = { |
| 1202 |
|
.open = ccs_open, |
| 1203 |
|
.release = ccs_release, |
| 1204 |
|
.poll = ccs_poll, |
| 1205 |
|
.read = ccs_read, |
| 1206 |
|
.write = ccs_write, |
| 1207 |
|
}; |
| 1208 |
|
|
| 1209 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 1210 |
|
|
| 1211 |
|
/* The inode operations for /proc/ccs/ directory. */ |
| 1212 |
|
static struct inode_operations ccs_dir_inode_operations; |
| 1213 |
|
|
| 1214 |
|
/* The inode operations for files under /proc/ccs/ directory. */ |
| 1215 |
|
static struct inode_operations ccs_file_inode_operations; |
| 1216 |
|
|
| 1217 |
|
#endif |
| 1218 |
|
|
| 1219 |
|
/***** SECTION6: Dependent functions section *****/ |
| 1220 |
|
|
| 1221 |
|
/** |
| 1222 |
|
* list_for_each_cookie - iterate over a list with cookie. |
| 1223 |
|
* |
| 1224 |
|
* @pos: Pointer to "struct list_head". |
| 1225 |
|
* @head: Pointer to "struct list_head". |
| 1226 |
|
*/ |
| 1227 |
|
#define list_for_each_cookie(pos, head) \ |
| 1228 |
|
for (pos = pos ? pos : srcu_dereference((head)->next, &ccs_ss); \ |
| 1229 |
|
pos != (head); pos = srcu_dereference(pos->next, &ccs_ss)) |
| 1230 |
|
|
| 1231 |
|
#ifdef CONFIG_CCSECURITY_NETWORK |
| 1232 |
|
|
| 1233 |
|
/** |
| 1234 |
|
* ccs_print_ip - Print an IP address. |
| 1235 |
|
* |
| 1236 |
|
* @buf: Buffer to write to. |
| 1237 |
|
* @size: Size of @buf. |
| 1238 |
|
* @ptr: Pointer to "struct ipaddr_union". |
| 1239 |
|
* |
| 1240 |
|
* Returns nothing. |
| 1241 |
|
*/ |
| 1242 |
|
static void ccs_print_ip(char *buf, const unsigned int size, |
| 1243 |
|
const struct ccs_ipaddr_union *ptr) |
| 1244 |
|
{ |
| 1245 |
|
int len; |
| 1246 |
|
if (ptr->is_ipv6) |
| 1247 |
|
len = ccs_print_ipv6(buf, size, &ptr->ip[0]); |
| 1248 |
|
else |
| 1249 |
|
len = ccs_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0]); |
| 1250 |
|
if (!memcmp(&ptr->ip[0], &ptr->ip[1], 16) || len >= size / 2) |
| 1251 |
|
return; |
| 1252 |
|
buf[len++] = '-'; |
| 1253 |
|
if (ptr->is_ipv6) |
| 1254 |
|
ccs_print_ipv6(buf + len, size - len, &ptr->ip[1]); |
| 1255 |
|
else |
| 1256 |
|
ccs_print_ipv4(buf + len, size - len, |
| 1257 |
|
&ptr->ip[1].s6_addr32[0]); |
| 1258 |
|
} |
| 1259 |
|
|
| 1260 |
|
#endif |
| 1261 |
|
|
| 1262 |
|
/** |
| 1263 |
|
* ccs_read_token - Read a word from a line. |
| 1264 |
|
* |
| 1265 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1266 |
|
* |
| 1267 |
|
* Returns a word on success, "" otherwise. |
| 1268 |
|
* |
| 1269 |
|
* To allow the caller to skip NULL check, this function returns "" rather than |
| 1270 |
|
* NULL if there is no more words to read. |
| 1271 |
|
*/ |
| 1272 |
|
static char *ccs_read_token(struct ccs_acl_param *param) |
| 1273 |
|
{ |
| 1274 |
|
char *pos = param->data; |
| 1275 |
|
char *del = strchr(pos, ' '); |
| 1276 |
|
if (del) |
| 1277 |
|
*del++ = '\0'; |
| 1278 |
|
else |
| 1279 |
|
del = pos + strlen(pos); |
| 1280 |
|
param->data = del; |
| 1281 |
|
return pos; |
| 1282 |
|
} |
| 1283 |
|
|
| 1284 |
/** |
/** |
| 1285 |
* ccs_cap2keyword - Convert capability operation to capability name. |
* ccs_make_byte - Make byte value from three octal characters. |
| 1286 |
* |
* |
| 1287 |
* @operation: The capability index. |
* @c1: The first character. |
| 1288 |
|
* @c2: The second character. |
| 1289 |
|
* @c3: The third character. |
| 1290 |
* |
* |
| 1291 |
* Returns the name of the specified capability's name. |
* Returns byte value. |
| 1292 |
*/ |
*/ |
| 1293 |
const char *ccs_cap2keyword(const u8 operation) |
static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3) |
| 1294 |
{ |
{ |
| 1295 |
return operation < CCS_MAX_CAPABILITY_INDEX |
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
| 1296 |
? ccs_mac_keywords[CCS_MAX_MAC_INDEX + operation] + 12 : NULL; |
} |
| 1297 |
|
|
| 1298 |
|
/** |
| 1299 |
|
* ccs_correct_word2 - Check whether the given string follows the naming rules. |
| 1300 |
|
* |
| 1301 |
|
* @string: The byte sequence to check. Not '\0'-terminated. |
| 1302 |
|
* @len: Length of @string. |
| 1303 |
|
* |
| 1304 |
|
* Returns true if @string follows the naming rules, false otherwise. |
| 1305 |
|
*/ |
| 1306 |
|
static bool ccs_correct_word2(const char *string, size_t len) |
| 1307 |
|
{ |
| 1308 |
|
const char *const start = string; |
| 1309 |
|
bool in_repetition = false; |
| 1310 |
|
unsigned char c; |
| 1311 |
|
unsigned char d; |
| 1312 |
|
unsigned char e; |
| 1313 |
|
if (!len) |
| 1314 |
|
goto out; |
| 1315 |
|
while (len--) { |
| 1316 |
|
c = *string++; |
| 1317 |
|
if (c == '\\') { |
| 1318 |
|
if (!len--) |
| 1319 |
|
goto out; |
| 1320 |
|
c = *string++; |
| 1321 |
|
switch (c) { |
| 1322 |
|
case '\\': /* "\\" */ |
| 1323 |
|
continue; |
| 1324 |
|
case '$': /* "\$" */ |
| 1325 |
|
case '+': /* "\+" */ |
| 1326 |
|
case '?': /* "\?" */ |
| 1327 |
|
case '*': /* "\*" */ |
| 1328 |
|
case '@': /* "\@" */ |
| 1329 |
|
case 'x': /* "\x" */ |
| 1330 |
|
case 'X': /* "\X" */ |
| 1331 |
|
case 'a': /* "\a" */ |
| 1332 |
|
case 'A': /* "\A" */ |
| 1333 |
|
case '-': /* "\-" */ |
| 1334 |
|
continue; |
| 1335 |
|
case '{': /* "/\{" */ |
| 1336 |
|
if (string - 3 < start || *(string - 3) != '/') |
| 1337 |
|
break; |
| 1338 |
|
in_repetition = true; |
| 1339 |
|
continue; |
| 1340 |
|
case '}': /* "\}/" */ |
| 1341 |
|
if (*string != '/') |
| 1342 |
|
break; |
| 1343 |
|
if (!in_repetition) |
| 1344 |
|
break; |
| 1345 |
|
in_repetition = false; |
| 1346 |
|
continue; |
| 1347 |
|
case '0': /* "\ooo" */ |
| 1348 |
|
case '1': |
| 1349 |
|
case '2': |
| 1350 |
|
case '3': |
| 1351 |
|
if (!len-- || !len--) |
| 1352 |
|
break; |
| 1353 |
|
d = *string++; |
| 1354 |
|
e = *string++; |
| 1355 |
|
if (d < '0' || d > '7' || e < '0' || e > '7') |
| 1356 |
|
break; |
| 1357 |
|
c = ccs_make_byte(c, d, e); |
| 1358 |
|
if (c <= ' ' || c >= 127) |
| 1359 |
|
continue; |
| 1360 |
|
} |
| 1361 |
|
goto out; |
| 1362 |
|
} else if (in_repetition && c == '/') { |
| 1363 |
|
goto out; |
| 1364 |
|
} else if (c <= ' ' || c >= 127) { |
| 1365 |
|
goto out; |
| 1366 |
|
} |
| 1367 |
|
} |
| 1368 |
|
if (in_repetition) |
| 1369 |
|
goto out; |
| 1370 |
|
return true; |
| 1371 |
|
out: |
| 1372 |
|
return false; |
| 1373 |
|
} |
| 1374 |
|
|
| 1375 |
|
/** |
| 1376 |
|
* ccs_correct_word - Check whether the given string follows the naming rules. |
| 1377 |
|
* |
| 1378 |
|
* @string: The string to check. |
| 1379 |
|
* |
| 1380 |
|
* Returns true if @string follows the naming rules, false otherwise. |
| 1381 |
|
*/ |
| 1382 |
|
static bool ccs_correct_word(const char *string) |
| 1383 |
|
{ |
| 1384 |
|
return ccs_correct_word2(string, strlen(string)); |
| 1385 |
|
} |
| 1386 |
|
|
| 1387 |
|
/** |
| 1388 |
|
* ccs_get_group - Allocate memory for "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group". |
| 1389 |
|
* |
| 1390 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1391 |
|
* @idx: Index number. |
| 1392 |
|
* |
| 1393 |
|
* Returns pointer to "struct ccs_group" on success, NULL otherwise. |
| 1394 |
|
*/ |
| 1395 |
|
static struct ccs_group *ccs_get_group(struct ccs_acl_param *param, |
| 1396 |
|
const u8 idx) |
| 1397 |
|
{ |
| 1398 |
|
struct ccs_group e = { }; |
| 1399 |
|
struct ccs_group *group = NULL; |
| 1400 |
|
struct list_head *list; |
| 1401 |
|
const char *group_name = ccs_read_token(param); |
| 1402 |
|
bool found = false; |
| 1403 |
|
if (!ccs_correct_word(group_name) || idx >= CCS_MAX_GROUP) |
| 1404 |
|
return NULL; |
| 1405 |
|
e.group_name = ccs_get_name(group_name); |
| 1406 |
|
if (!e.group_name) |
| 1407 |
|
return NULL; |
| 1408 |
|
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 1409 |
|
goto out; |
| 1410 |
|
list = ¶m->ns->group_list[idx]; |
| 1411 |
|
list_for_each_entry(group, list, head.list) { |
| 1412 |
|
if (e.group_name != group->group_name || |
| 1413 |
|
atomic_read(&group->head.users) == CCS_GC_IN_PROGRESS) |
| 1414 |
|
continue; |
| 1415 |
|
atomic_inc(&group->head.users); |
| 1416 |
|
found = true; |
| 1417 |
|
break; |
| 1418 |
|
} |
| 1419 |
|
if (!found) { |
| 1420 |
|
struct ccs_group *entry = ccs_commit_ok(&e, sizeof(e)); |
| 1421 |
|
if (entry) { |
| 1422 |
|
INIT_LIST_HEAD(&entry->member_list); |
| 1423 |
|
atomic_set(&entry->head.users, 1); |
| 1424 |
|
list_add_tail_rcu(&entry->head.list, list); |
| 1425 |
|
group = entry; |
| 1426 |
|
found = true; |
| 1427 |
|
} |
| 1428 |
|
} |
| 1429 |
|
mutex_unlock(&ccs_policy_lock); |
| 1430 |
|
out: |
| 1431 |
|
ccs_put_name(e.group_name); |
| 1432 |
|
return found ? group : NULL; |
| 1433 |
|
} |
| 1434 |
|
|
| 1435 |
|
/** |
| 1436 |
|
* ccs_parse_name_union - Parse a ccs_name_union. |
| 1437 |
|
* |
| 1438 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1439 |
|
* @ptr: Pointer to "struct ccs_name_union". |
| 1440 |
|
* |
| 1441 |
|
* Returns true on success, false otherwise. |
| 1442 |
|
*/ |
| 1443 |
|
static bool ccs_parse_name_union(struct ccs_acl_param *param, |
| 1444 |
|
struct ccs_name_union *ptr) |
| 1445 |
|
{ |
| 1446 |
|
char *filename; |
| 1447 |
|
if (param->data[0] == '@') { |
| 1448 |
|
param->data++; |
| 1449 |
|
ptr->group = ccs_get_group(param, CCS_PATH_GROUP); |
| 1450 |
|
return ptr->group != NULL; |
| 1451 |
|
} |
| 1452 |
|
filename = ccs_read_token(param); |
| 1453 |
|
if (!ccs_correct_word(filename)) |
| 1454 |
|
return false; |
| 1455 |
|
ptr->filename = ccs_get_name(filename); |
| 1456 |
|
return ptr->filename != NULL; |
| 1457 |
|
} |
| 1458 |
|
|
| 1459 |
|
/** |
| 1460 |
|
* ccs_parse_ulong - Parse an "unsigned long" value. |
| 1461 |
|
* |
| 1462 |
|
* @result: Pointer to "unsigned long". |
| 1463 |
|
* @str: Pointer to string to parse. |
| 1464 |
|
* |
| 1465 |
|
* Returns one of values in "enum ccs_value_type". |
| 1466 |
|
* |
| 1467 |
|
* The @src is updated to point the first character after the value |
| 1468 |
|
* on success. |
| 1469 |
|
*/ |
| 1470 |
|
static u8 ccs_parse_ulong(unsigned long *result, char **str) |
| 1471 |
|
{ |
| 1472 |
|
const char *cp = *str; |
| 1473 |
|
char *ep; |
| 1474 |
|
int base = 10; |
| 1475 |
|
if (*cp == '0') { |
| 1476 |
|
char c = *(cp + 1); |
| 1477 |
|
if (c == 'x' || c == 'X') { |
| 1478 |
|
base = 16; |
| 1479 |
|
cp += 2; |
| 1480 |
|
} else if (c >= '0' && c <= '7') { |
| 1481 |
|
base = 8; |
| 1482 |
|
cp++; |
| 1483 |
|
} |
| 1484 |
|
} |
| 1485 |
|
*result = simple_strtoul(cp, &ep, base); |
| 1486 |
|
if (cp == ep) |
| 1487 |
|
return CCS_VALUE_TYPE_INVALID; |
| 1488 |
|
*str = ep; |
| 1489 |
|
switch (base) { |
| 1490 |
|
case 16: |
| 1491 |
|
return CCS_VALUE_TYPE_HEXADECIMAL; |
| 1492 |
|
case 8: |
| 1493 |
|
return CCS_VALUE_TYPE_OCTAL; |
| 1494 |
|
default: |
| 1495 |
|
return CCS_VALUE_TYPE_DECIMAL; |
| 1496 |
|
} |
| 1497 |
|
} |
| 1498 |
|
|
| 1499 |
|
/** |
| 1500 |
|
* ccs_parse_number_union - Parse a ccs_number_union. |
| 1501 |
|
* |
| 1502 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1503 |
|
* @ptr: Pointer to "struct ccs_number_union". |
| 1504 |
|
* |
| 1505 |
|
* Returns true on success, false otherwise. |
| 1506 |
|
*/ |
| 1507 |
|
static bool ccs_parse_number_union(struct ccs_acl_param *param, |
| 1508 |
|
struct ccs_number_union *ptr) |
| 1509 |
|
{ |
| 1510 |
|
char *data; |
| 1511 |
|
u8 type; |
| 1512 |
|
unsigned long v; |
| 1513 |
|
memset(ptr, 0, sizeof(*ptr)); |
| 1514 |
|
if (param->data[0] == '@') { |
| 1515 |
|
param->data++; |
| 1516 |
|
ptr->group = ccs_get_group(param, CCS_NUMBER_GROUP); |
| 1517 |
|
return ptr->group != NULL; |
| 1518 |
|
} |
| 1519 |
|
data = ccs_read_token(param); |
| 1520 |
|
type = ccs_parse_ulong(&v, &data); |
| 1521 |
|
if (type == CCS_VALUE_TYPE_INVALID) |
| 1522 |
|
return false; |
| 1523 |
|
ptr->values[0] = v; |
| 1524 |
|
ptr->value_type[0] = type; |
| 1525 |
|
if (!*data) { |
| 1526 |
|
ptr->values[1] = v; |
| 1527 |
|
ptr->value_type[1] = type; |
| 1528 |
|
return true; |
| 1529 |
|
} |
| 1530 |
|
if (*data++ != '-') |
| 1531 |
|
return false; |
| 1532 |
|
type = ccs_parse_ulong(&v, &data); |
| 1533 |
|
if (type == CCS_VALUE_TYPE_INVALID || *data || ptr->values[0] > v) |
| 1534 |
|
return false; |
| 1535 |
|
ptr->values[1] = v; |
| 1536 |
|
ptr->value_type[1] = type; |
| 1537 |
|
return true; |
| 1538 |
|
} |
| 1539 |
|
|
| 1540 |
|
#ifdef CONFIG_CCSECURITY_NETWORK |
| 1541 |
|
|
| 1542 |
|
/** |
| 1543 |
|
* ccs_parse_ipaddr_union - Parse an IP address. |
| 1544 |
|
* |
| 1545 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1546 |
|
* @ptr: Pointer to "struct ccs_ipaddr_union". |
| 1547 |
|
* |
| 1548 |
|
* Returns true on success, false otherwise. |
| 1549 |
|
*/ |
| 1550 |
|
static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param, |
| 1551 |
|
struct ccs_ipaddr_union *ptr) |
| 1552 |
|
{ |
| 1553 |
|
u8 * const min = ptr->ip[0].in6_u.u6_addr8; |
| 1554 |
|
u8 * const max = ptr->ip[1].in6_u.u6_addr8; |
| 1555 |
|
char *address = ccs_read_token(param); |
| 1556 |
|
const char *end; |
| 1557 |
|
if (!strchr(address, ':') && |
| 1558 |
|
ccs_in4_pton(address, -1, min, '-', &end) > 0) { |
| 1559 |
|
ptr->is_ipv6 = false; |
| 1560 |
|
if (!*end) |
| 1561 |
|
ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0]; |
| 1562 |
|
else if (*end++ != '-' || |
| 1563 |
|
ccs_in4_pton(end, -1, max, '\0', &end) <= 0 || *end) |
| 1564 |
|
return false; |
| 1565 |
|
return true; |
| 1566 |
|
} |
| 1567 |
|
if (ccs_in6_pton(address, -1, min, '-', &end) > 0) { |
| 1568 |
|
ptr->is_ipv6 = true; |
| 1569 |
|
if (!*end) |
| 1570 |
|
memmove(max, min, sizeof(u16) * 8); |
| 1571 |
|
else if (*end++ != '-' || |
| 1572 |
|
ccs_in6_pton(end, -1, max, '\0', &end) <= 0 || *end) |
| 1573 |
|
return false; |
| 1574 |
|
return true; |
| 1575 |
|
} |
| 1576 |
|
return false; |
| 1577 |
|
} |
| 1578 |
|
|
| 1579 |
|
#endif |
| 1580 |
|
|
| 1581 |
|
/** |
| 1582 |
|
* ccs_get_dqword - ccs_get_name() for a quoted string. |
| 1583 |
|
* |
| 1584 |
|
* @start: String to save. |
| 1585 |
|
* |
| 1586 |
|
* Returns pointer to "struct ccs_path_info" on success, NULL otherwise. |
| 1587 |
|
*/ |
| 1588 |
|
static const struct ccs_path_info *ccs_get_dqword(char *start) |
| 1589 |
|
{ |
| 1590 |
|
char *cp = start + strlen(start) - 1; |
| 1591 |
|
if (cp == start || *start++ != '"' || *cp != '"') |
| 1592 |
|
return NULL; |
| 1593 |
|
*cp = '\0'; |
| 1594 |
|
if (*start && !ccs_correct_word(start)) |
| 1595 |
|
return NULL; |
| 1596 |
|
return ccs_get_name(start); |
| 1597 |
|
} |
| 1598 |
|
|
| 1599 |
|
/** |
| 1600 |
|
* ccs_parse_name_union_quoted - Parse a quoted word. |
| 1601 |
|
* |
| 1602 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1603 |
|
* @ptr: Pointer to "struct ccs_name_union". |
| 1604 |
|
* |
| 1605 |
|
* Returns true on success, false otherwise. |
| 1606 |
|
*/ |
| 1607 |
|
static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param, |
| 1608 |
|
struct ccs_name_union *ptr) |
| 1609 |
|
{ |
| 1610 |
|
char *filename = param->data; |
| 1611 |
|
if (*filename == '@') |
| 1612 |
|
return ccs_parse_name_union(param, ptr); |
| 1613 |
|
ptr->filename = ccs_get_dqword(filename); |
| 1614 |
|
return ptr->filename != NULL; |
| 1615 |
|
} |
| 1616 |
|
|
| 1617 |
|
/** |
| 1618 |
|
* ccs_parse_argv - Parse an argv[] condition part. |
| 1619 |
|
* |
| 1620 |
|
* @left: Lefthand value. |
| 1621 |
|
* @right: Righthand value. |
| 1622 |
|
* @argv: Pointer to "struct ccs_argv". |
| 1623 |
|
* |
| 1624 |
|
* Returns true on success, false otherwise. |
| 1625 |
|
*/ |
| 1626 |
|
static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv) |
| 1627 |
|
{ |
| 1628 |
|
if (ccs_parse_ulong(&argv->index, &left) != CCS_VALUE_TYPE_DECIMAL || |
| 1629 |
|
*left++ != ']' || *left) |
| 1630 |
|
return false; |
| 1631 |
|
argv->value = ccs_get_dqword(right); |
| 1632 |
|
return argv->value != NULL; |
| 1633 |
|
} |
| 1634 |
|
|
| 1635 |
|
/** |
| 1636 |
|
* ccs_parse_envp - Parse an envp[] condition part. |
| 1637 |
|
* |
| 1638 |
|
* @left: Lefthand value. |
| 1639 |
|
* @right: Righthand value. |
| 1640 |
|
* @envp: Pointer to "struct ccs_envp". |
| 1641 |
|
* |
| 1642 |
|
* Returns true on success, false otherwise. |
| 1643 |
|
*/ |
| 1644 |
|
static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp) |
| 1645 |
|
{ |
| 1646 |
|
const struct ccs_path_info *name; |
| 1647 |
|
const struct ccs_path_info *value; |
| 1648 |
|
char *cp = left + strlen(left) - 1; |
| 1649 |
|
if (*cp-- != ']' || *cp != '"') |
| 1650 |
|
goto out; |
| 1651 |
|
*cp = '\0'; |
| 1652 |
|
if (!ccs_correct_word(left)) |
| 1653 |
|
goto out; |
| 1654 |
|
name = ccs_get_name(left); |
| 1655 |
|
if (!name) |
| 1656 |
|
goto out; |
| 1657 |
|
if (!strcmp(right, "NULL")) { |
| 1658 |
|
value = NULL; |
| 1659 |
|
} else { |
| 1660 |
|
value = ccs_get_dqword(right); |
| 1661 |
|
if (!value) { |
| 1662 |
|
ccs_put_name(name); |
| 1663 |
|
goto out; |
| 1664 |
|
} |
| 1665 |
|
} |
| 1666 |
|
envp->name = name; |
| 1667 |
|
envp->value = value; |
| 1668 |
|
return true; |
| 1669 |
|
out: |
| 1670 |
|
return false; |
| 1671 |
|
} |
| 1672 |
|
|
| 1673 |
|
/** |
| 1674 |
|
* ccs_same_condition - Check for duplicated "struct ccs_condition" entry. |
| 1675 |
|
* |
| 1676 |
|
* @a: Pointer to "struct ccs_condition". |
| 1677 |
|
* @b: Pointer to "struct ccs_condition". |
| 1678 |
|
* |
| 1679 |
|
* Returns true if @a == @b, false otherwise. |
| 1680 |
|
*/ |
| 1681 |
|
static bool ccs_same_condition(const struct ccs_condition *a, |
| 1682 |
|
const struct ccs_condition *b) |
| 1683 |
|
{ |
| 1684 |
|
return a->size == b->size && a->condc == b->condc && |
| 1685 |
|
a->numbers_count == b->numbers_count && |
| 1686 |
|
a->names_count == b->names_count && |
| 1687 |
|
a->argc == b->argc && a->envc == b->envc && |
| 1688 |
|
a->grant_log == b->grant_log && |
| 1689 |
|
a->exec_transit == b->exec_transit && a->transit == b->transit |
| 1690 |
|
&& !memcmp(a + 1, b + 1, a->size - sizeof(*a)); |
| 1691 |
|
} |
| 1692 |
|
|
| 1693 |
|
/** |
| 1694 |
|
* ccs_condition_type - Get condition type. |
| 1695 |
|
* |
| 1696 |
|
* @word: Keyword string. |
| 1697 |
|
* |
| 1698 |
|
* Returns one of values in "enum ccs_conditions_index" on success, |
| 1699 |
|
* CCS_MAX_CONDITION_KEYWORD otherwise. |
| 1700 |
|
*/ |
| 1701 |
|
static u8 ccs_condition_type(const char *word) |
| 1702 |
|
{ |
| 1703 |
|
u8 i; |
| 1704 |
|
for (i = 0; i < CCS_MAX_CONDITION_KEYWORD; i++) { |
| 1705 |
|
if (!strcmp(word, ccs_condition_keyword[i])) |
| 1706 |
|
break; |
| 1707 |
|
} |
| 1708 |
|
return i; |
| 1709 |
|
} |
| 1710 |
|
|
| 1711 |
|
/** |
| 1712 |
|
* ccs_commit_condition - Commit "struct ccs_condition". |
| 1713 |
|
* |
| 1714 |
|
* @entry: Pointer to "struct ccs_condition". |
| 1715 |
|
* |
| 1716 |
|
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 1717 |
|
* |
| 1718 |
|
* This function merges duplicated entries. This function returns NULL if |
| 1719 |
|
* @entry is not duplicated but memory quota for policy has exceeded. |
| 1720 |
|
*/ |
| 1721 |
|
static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry) |
| 1722 |
|
{ |
| 1723 |
|
struct ccs_condition *ptr; |
| 1724 |
|
bool found = false; |
| 1725 |
|
if (mutex_lock_interruptible(&ccs_policy_lock)) { |
| 1726 |
|
dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__); |
| 1727 |
|
ptr = NULL; |
| 1728 |
|
found = true; |
| 1729 |
|
goto out; |
| 1730 |
|
} |
| 1731 |
|
list_for_each_entry(ptr, &ccs_condition_list, head.list) { |
| 1732 |
|
if (!ccs_same_condition(ptr, entry) || |
| 1733 |
|
atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS) |
| 1734 |
|
continue; |
| 1735 |
|
/* Same entry found. Share this entry. */ |
| 1736 |
|
atomic_inc(&ptr->head.users); |
| 1737 |
|
found = true; |
| 1738 |
|
break; |
| 1739 |
|
} |
| 1740 |
|
if (!found) { |
| 1741 |
|
if (ccs_memory_ok(entry, entry->size)) { |
| 1742 |
|
atomic_set(&entry->head.users, 1); |
| 1743 |
|
list_add(&entry->head.list, &ccs_condition_list); |
| 1744 |
|
} else { |
| 1745 |
|
found = true; |
| 1746 |
|
ptr = NULL; |
| 1747 |
|
} |
| 1748 |
|
} |
| 1749 |
|
mutex_unlock(&ccs_policy_lock); |
| 1750 |
|
out: |
| 1751 |
|
if (found) { |
| 1752 |
|
ccs_del_condition(&entry->head.list); |
| 1753 |
|
kfree(entry); |
| 1754 |
|
entry = ptr; |
| 1755 |
|
} |
| 1756 |
|
return entry; |
| 1757 |
|
} |
| 1758 |
|
|
| 1759 |
|
/** |
| 1760 |
|
* ccs_correct_path - Check whether the given pathname follows the naming rules. |
| 1761 |
|
* |
| 1762 |
|
* @filename: The pathname to check. |
| 1763 |
|
* |
| 1764 |
|
* Returns true if @filename follows the naming rules, false otherwise. |
| 1765 |
|
*/ |
| 1766 |
|
static bool ccs_correct_path(const char *filename) |
| 1767 |
|
{ |
| 1768 |
|
return *filename == '/' && ccs_correct_word(filename); |
| 1769 |
|
} |
| 1770 |
|
|
| 1771 |
|
/** |
| 1772 |
|
* ccs_domain_def - Check whether the given token can be a domainname. |
| 1773 |
|
* |
| 1774 |
|
* @buffer: The token to check. |
| 1775 |
|
* |
| 1776 |
|
* Returns true if @buffer possibly be a domainname, false otherwise. |
| 1777 |
|
*/ |
| 1778 |
|
static bool ccs_domain_def(const unsigned char *buffer) |
| 1779 |
|
{ |
| 1780 |
|
const unsigned char *cp; |
| 1781 |
|
int len; |
| 1782 |
|
if (*buffer != '<') |
| 1783 |
|
return false; |
| 1784 |
|
cp = strchr(buffer, ' '); |
| 1785 |
|
if (!cp) |
| 1786 |
|
len = strlen(buffer); |
| 1787 |
|
else |
| 1788 |
|
len = cp - buffer; |
| 1789 |
|
if (buffer[len - 1] != '>' || !ccs_correct_word2(buffer + 1, len - 2)) |
| 1790 |
|
return false; |
| 1791 |
|
return true; |
| 1792 |
|
} |
| 1793 |
|
|
| 1794 |
|
/** |
| 1795 |
|
* ccs_correct_domain - Check whether the given domainname follows the naming rules. |
| 1796 |
|
* |
| 1797 |
|
* @domainname: The domainname to check. |
| 1798 |
|
* |
| 1799 |
|
* Returns true if @domainname follows the naming rules, false otherwise. |
| 1800 |
|
*/ |
| 1801 |
|
static bool ccs_correct_domain(const unsigned char *domainname) |
| 1802 |
|
{ |
| 1803 |
|
if (!domainname || !ccs_domain_def(domainname)) |
| 1804 |
|
return false; |
| 1805 |
|
domainname = strchr(domainname, ' '); |
| 1806 |
|
if (!domainname++) |
| 1807 |
|
return true; |
| 1808 |
|
while (1) { |
| 1809 |
|
const unsigned char *cp = strchr(domainname, ' '); |
| 1810 |
|
if (!cp) |
| 1811 |
|
break; |
| 1812 |
|
if (*domainname != '/' || |
| 1813 |
|
!ccs_correct_word2(domainname, cp - domainname)) |
| 1814 |
|
return false; |
| 1815 |
|
domainname = cp + 1; |
| 1816 |
|
} |
| 1817 |
|
return ccs_correct_path(domainname); |
| 1818 |
|
} |
| 1819 |
|
|
| 1820 |
|
/** |
| 1821 |
|
* ccs_normalize_line - Format string. |
| 1822 |
|
* |
| 1823 |
|
* @buffer: The line to normalize. |
| 1824 |
|
* |
| 1825 |
|
* Returns nothing. |
| 1826 |
|
* |
| 1827 |
|
* Leading and trailing whitespaces are removed. |
| 1828 |
|
* Multiple whitespaces are packed into single space. |
| 1829 |
|
*/ |
| 1830 |
|
static void ccs_normalize_line(unsigned char *buffer) |
| 1831 |
|
{ |
| 1832 |
|
unsigned char *sp = buffer; |
| 1833 |
|
unsigned char *dp = buffer; |
| 1834 |
|
bool first = true; |
| 1835 |
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
| 1836 |
|
sp++; |
| 1837 |
|
while (*sp) { |
| 1838 |
|
if (!first) |
| 1839 |
|
*dp++ = ' '; |
| 1840 |
|
first = false; |
| 1841 |
|
while (*sp > ' ' && *sp < 127) |
| 1842 |
|
*dp++ = *sp++; |
| 1843 |
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
| 1844 |
|
sp++; |
| 1845 |
|
} |
| 1846 |
|
*dp = '\0'; |
| 1847 |
|
} |
| 1848 |
|
|
| 1849 |
|
/** |
| 1850 |
|
* ccs_get_domainname - Read a domainname from a line. |
| 1851 |
|
* |
| 1852 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1853 |
|
* |
| 1854 |
|
* Returns a domainname on success, NULL otherwise. |
| 1855 |
|
*/ |
| 1856 |
|
static const struct ccs_path_info *ccs_get_domainname |
| 1857 |
|
(struct ccs_acl_param *param) |
| 1858 |
|
{ |
| 1859 |
|
char *start = param->data; |
| 1860 |
|
char *pos = start; |
| 1861 |
|
while (*pos) { |
| 1862 |
|
if (*pos++ != ' ' || *pos++ == '/') |
| 1863 |
|
continue; |
| 1864 |
|
pos -= 2; |
| 1865 |
|
*pos++ = '\0'; |
| 1866 |
|
break; |
| 1867 |
|
} |
| 1868 |
|
param->data = pos; |
| 1869 |
|
if (ccs_correct_domain(start)) |
| 1870 |
|
return ccs_get_name(start); |
| 1871 |
|
return NULL; |
| 1872 |
|
} |
| 1873 |
|
|
| 1874 |
|
/** |
| 1875 |
|
* ccs_get_transit_preference - Parse domain transition preference for execve(). |
| 1876 |
|
* |
| 1877 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1878 |
|
* @e: Pointer to "struct ccs_condition". |
| 1879 |
|
* |
| 1880 |
|
* Returns the condition string part. |
| 1881 |
|
*/ |
| 1882 |
|
static char *ccs_get_transit_preference(struct ccs_acl_param *param, |
| 1883 |
|
struct ccs_condition *e) |
| 1884 |
|
{ |
| 1885 |
|
char * const pos = param->data; |
| 1886 |
|
bool flag; |
| 1887 |
|
if (*pos == '<') { |
| 1888 |
|
e->transit = ccs_get_domainname(param); |
| 1889 |
|
goto done; |
| 1890 |
|
} |
| 1891 |
|
{ |
| 1892 |
|
char *cp = strchr(pos, ' '); |
| 1893 |
|
if (cp) |
| 1894 |
|
*cp = '\0'; |
| 1895 |
|
flag = ccs_correct_path(pos) || !strcmp(pos, "keep") || |
| 1896 |
|
!strcmp(pos, "initialize") || !strcmp(pos, "reset") || |
| 1897 |
|
!strcmp(pos, "child") || !strcmp(pos, "parent"); |
| 1898 |
|
if (cp) |
| 1899 |
|
*cp = ' '; |
| 1900 |
|
} |
| 1901 |
|
if (!flag) |
| 1902 |
|
return pos; |
| 1903 |
|
e->transit = ccs_get_name(ccs_read_token(param)); |
| 1904 |
|
done: |
| 1905 |
|
if (e->transit) { |
| 1906 |
|
e->exec_transit = true; |
| 1907 |
|
return param->data; |
| 1908 |
|
} |
| 1909 |
|
/* |
| 1910 |
|
* Return a bad read-only condition string that will let |
| 1911 |
|
* ccs_get_condition() return NULL. |
| 1912 |
|
*/ |
| 1913 |
|
return "/"; |
| 1914 |
|
} |
| 1915 |
|
|
| 1916 |
|
/** |
| 1917 |
|
* ccs_get_condition - Parse condition part. |
| 1918 |
|
* |
| 1919 |
|
* @param: Pointer to "struct ccs_acl_param". |
| 1920 |
|
* |
| 1921 |
|
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 1922 |
|
*/ |
| 1923 |
|
struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param) |
| 1924 |
|
{ |
| 1925 |
|
struct ccs_condition *entry = NULL; |
| 1926 |
|
struct ccs_condition_element *condp = NULL; |
| 1927 |
|
struct ccs_number_union *numbers_p = NULL; |
| 1928 |
|
struct ccs_name_union *names_p = NULL; |
| 1929 |
|
struct ccs_argv *argv = NULL; |
| 1930 |
|
struct ccs_envp *envp = NULL; |
| 1931 |
|
struct ccs_condition e = { }; |
| 1932 |
|
char * const start_of_string = ccs_get_transit_preference(param, &e); |
| 1933 |
|
char * const end_of_string = start_of_string + strlen(start_of_string); |
| 1934 |
|
char *pos; |
| 1935 |
|
rerun: |
| 1936 |
|
pos = start_of_string; |
| 1937 |
|
while (1) { |
| 1938 |
|
u8 left = -1; |
| 1939 |
|
u8 right = -1; |
| 1940 |
|
char *left_word = pos; |
| 1941 |
|
char *cp; |
| 1942 |
|
char *right_word; |
| 1943 |
|
bool is_not; |
| 1944 |
|
if (!*left_word) |
| 1945 |
|
break; |
| 1946 |
|
/* |
| 1947 |
|
* Since left-hand condition does not allow use of "path_group" |
| 1948 |
|
* or "number_group" and environment variable's names do not |
| 1949 |
|
* accept '=', it is guaranteed that the original line consists |
| 1950 |
|
* of one or more repetition of $left$operator$right blocks |
| 1951 |
|
* where "$left is free from '=' and ' '" and "$operator is |
| 1952 |
|
* either '=' or '!='" and "$right is free from ' '". |
| 1953 |
|
* Therefore, we can reconstruct the original line at the end |
| 1954 |
|
* of dry run even if we overwrite $operator with '\0'. |
| 1955 |
|
*/ |
| 1956 |
|
cp = strchr(pos, ' '); |
| 1957 |
|
if (cp) { |
| 1958 |
|
*cp = '\0'; /* Will restore later. */ |
| 1959 |
|
pos = cp + 1; |
| 1960 |
|
} else { |
| 1961 |
|
pos = ""; |
| 1962 |
|
} |
| 1963 |
|
right_word = strchr(left_word, '='); |
| 1964 |
|
if (!right_word || right_word == left_word) |
| 1965 |
|
goto out; |
| 1966 |
|
is_not = *(right_word - 1) == '!'; |
| 1967 |
|
if (is_not) |
| 1968 |
|
*(right_word++ - 1) = '\0'; /* Will restore later. */ |
| 1969 |
|
else if (*(right_word + 1) != '=') |
| 1970 |
|
*right_word++ = '\0'; /* Will restore later. */ |
| 1971 |
|
else |
| 1972 |
|
goto out; |
| 1973 |
|
dprintk(KERN_WARNING "%u: <%s>%s=<%s>\n", __LINE__, left_word, |
| 1974 |
|
is_not ? "!" : "", right_word); |
| 1975 |
|
if (!strcmp(left_word, "grant_log")) { |
| 1976 |
|
if (entry) { |
| 1977 |
|
if (is_not || |
| 1978 |
|
entry->grant_log != CCS_GRANTLOG_AUTO) |
| 1979 |
|
goto out; |
| 1980 |
|
else if (!strcmp(right_word, "yes")) |
| 1981 |
|
entry->grant_log = CCS_GRANTLOG_YES; |
| 1982 |
|
else if (!strcmp(right_word, "no")) |
| 1983 |
|
entry->grant_log = CCS_GRANTLOG_NO; |
| 1984 |
|
else |
| 1985 |
|
goto out; |
| 1986 |
|
} |
| 1987 |
|
continue; |
| 1988 |
|
} |
| 1989 |
|
if (!strcmp(left_word, "auto_domain_transition")) { |
| 1990 |
|
if (entry) { |
| 1991 |
|
if (is_not || entry->transit) |
| 1992 |
|
goto out; |
| 1993 |
|
entry->transit = ccs_get_dqword(right_word); |
| 1994 |
|
if (!entry->transit || |
| 1995 |
|
(entry->transit->name[0] != '/' && |
| 1996 |
|
!ccs_domain_def(entry->transit->name))) |
| 1997 |
|
goto out; |
| 1998 |
|
} |
| 1999 |
|
continue; |
| 2000 |
|
} |
| 2001 |
|
if (!strncmp(left_word, "exec.argv[", 10)) { |
| 2002 |
|
if (!argv) { |
| 2003 |
|
e.argc++; |
| 2004 |
|
e.condc++; |
| 2005 |
|
} else { |
| 2006 |
|
e.argc--; |
| 2007 |
|
e.condc--; |
| 2008 |
|
left = CCS_ARGV_ENTRY; |
| 2009 |
|
argv->is_not = is_not; |
| 2010 |
|
if (!ccs_parse_argv(left_word + 10, |
| 2011 |
|
right_word, argv++)) |
| 2012 |
|
goto out; |
| 2013 |
|
} |
| 2014 |
|
goto store_value; |
| 2015 |
|
} |
| 2016 |
|
if (!strncmp(left_word, "exec.envp[\"", 11)) { |
| 2017 |
|
if (!envp) { |
| 2018 |
|
e.envc++; |
| 2019 |
|
e.condc++; |
| 2020 |
|
} else { |
| 2021 |
|
e.envc--; |
| 2022 |
|
e.condc--; |
| 2023 |
|
left = CCS_ENVP_ENTRY; |
| 2024 |
|
envp->is_not = is_not; |
| 2025 |
|
if (!ccs_parse_envp(left_word + 11, |
| 2026 |
|
right_word, envp++)) |
| 2027 |
|
goto out; |
| 2028 |
|
} |
| 2029 |
|
goto store_value; |
| 2030 |
|
} |
| 2031 |
|
left = ccs_condition_type(left_word); |
| 2032 |
|
dprintk(KERN_WARNING "%u: <%s> left=%u\n", __LINE__, left_word, |
| 2033 |
|
left); |
| 2034 |
|
if (left == CCS_MAX_CONDITION_KEYWORD) { |
| 2035 |
|
if (!numbers_p) { |
| 2036 |
|
e.numbers_count++; |
| 2037 |
|
} else { |
| 2038 |
|
e.numbers_count--; |
| 2039 |
|
left = CCS_NUMBER_UNION; |
| 2040 |
|
param->data = left_word; |
| 2041 |
|
if (*left_word == '@' || |
| 2042 |
|
!ccs_parse_number_union(param, |
| 2043 |
|
numbers_p++)) |
| 2044 |
|
goto out; |
| 2045 |
|
} |
| 2046 |
|
} |
| 2047 |
|
if (!condp) |
| 2048 |
|
e.condc++; |
| 2049 |
|
else |
| 2050 |
|
e.condc--; |
| 2051 |
|
if (left == CCS_EXEC_REALPATH || left == CCS_SYMLINK_TARGET) { |
| 2052 |
|
if (!names_p) { |
| 2053 |
|
e.names_count++; |
| 2054 |
|
} else { |
| 2055 |
|
e.names_count--; |
| 2056 |
|
right = CCS_NAME_UNION; |
| 2057 |
|
param->data = right_word; |
| 2058 |
|
if (!ccs_parse_name_union_quoted(param, |
| 2059 |
|
names_p++)) |
| 2060 |
|
goto out; |
| 2061 |
|
} |
| 2062 |
|
goto store_value; |
| 2063 |
|
} |
| 2064 |
|
right = ccs_condition_type(right_word); |
| 2065 |
|
if (right == CCS_MAX_CONDITION_KEYWORD) { |
| 2066 |
|
if (!numbers_p) { |
| 2067 |
|
e.numbers_count++; |
| 2068 |
|
} else { |
| 2069 |
|
e.numbers_count--; |
| 2070 |
|
right = CCS_NUMBER_UNION; |
| 2071 |
|
param->data = right_word; |
| 2072 |
|
if (!ccs_parse_number_union(param, |
| 2073 |
|
numbers_p++)) |
| 2074 |
|
goto out; |
| 2075 |
|
} |
| 2076 |
|
} |
| 2077 |
|
store_value: |
| 2078 |
|
if (!condp) { |
| 2079 |
|
dprintk(KERN_WARNING "%u: dry_run left=%u right=%u " |
| 2080 |
|
"match=%u\n", __LINE__, left, right, !is_not); |
| 2081 |
|
continue; |
| 2082 |
|
} |
| 2083 |
|
condp->left = left; |
| 2084 |
|
condp->right = right; |
| 2085 |
|
condp->equals = !is_not; |
| 2086 |
|
dprintk(KERN_WARNING "%u: left=%u right=%u match=%u\n", |
| 2087 |
|
__LINE__, condp->left, condp->right, |
| 2088 |
|
condp->equals); |
| 2089 |
|
condp++; |
| 2090 |
|
} |
| 2091 |
|
dprintk(KERN_INFO "%u: cond=%u numbers=%u names=%u ac=%u ec=%u\n", |
| 2092 |
|
__LINE__, e.condc, e.numbers_count, e.names_count, e.argc, |
| 2093 |
|
e.envc); |
| 2094 |
|
if (entry) { |
| 2095 |
|
BUG_ON(e.names_count | e.numbers_count | e.argc | e.envc | |
| 2096 |
|
e.condc); |
| 2097 |
|
return ccs_commit_condition(entry); |
| 2098 |
|
} |
| 2099 |
|
e.size = sizeof(*entry) |
| 2100 |
|
+ e.condc * sizeof(struct ccs_condition_element) |
| 2101 |
|
+ e.numbers_count * sizeof(struct ccs_number_union) |
| 2102 |
|
+ e.names_count * sizeof(struct ccs_name_union) |
| 2103 |
|
+ e.argc * sizeof(struct ccs_argv) |
| 2104 |
|
+ e.envc * sizeof(struct ccs_envp); |
| 2105 |
|
entry = kzalloc(e.size, CCS_GFP_FLAGS); |
| 2106 |
|
if (!entry) |
| 2107 |
|
goto out2; |
| 2108 |
|
*entry = e; |
| 2109 |
|
e.transit = NULL; |
| 2110 |
|
condp = (struct ccs_condition_element *) (entry + 1); |
| 2111 |
|
numbers_p = (struct ccs_number_union *) (condp + e.condc); |
| 2112 |
|
names_p = (struct ccs_name_union *) (numbers_p + e.numbers_count); |
| 2113 |
|
argv = (struct ccs_argv *) (names_p + e.names_count); |
| 2114 |
|
envp = (struct ccs_envp *) (argv + e.argc); |
| 2115 |
|
{ |
| 2116 |
|
bool flag = false; |
| 2117 |
|
for (pos = start_of_string; pos < end_of_string; pos++) { |
| 2118 |
|
if (*pos) |
| 2119 |
|
continue; |
| 2120 |
|
if (flag) /* Restore " ". */ |
| 2121 |
|
*pos = ' '; |
| 2122 |
|
else if (*(pos + 1) == '=') /* Restore "!=". */ |
| 2123 |
|
*pos = '!'; |
| 2124 |
|
else /* Restore "=". */ |
| 2125 |
|
*pos = '='; |
| 2126 |
|
flag = !flag; |
| 2127 |
|
} |
| 2128 |
|
} |
| 2129 |
|
goto rerun; |
| 2130 |
|
out: |
| 2131 |
|
dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__); |
| 2132 |
|
if (entry) { |
| 2133 |
|
ccs_del_condition(&entry->head.list); |
| 2134 |
|
kfree(entry); |
| 2135 |
|
} |
| 2136 |
|
out2: |
| 2137 |
|
ccs_put_name(e.transit); |
| 2138 |
|
return NULL; |
| 2139 |
} |
} |
| 2140 |
|
|
| 2141 |
/** |
/** |
| 2142 |
* ccs_yesno - Return "yes" or "no". |
* ccs_yesno - Return "yes" or "no". |
| 2143 |
* |
* |
| 2144 |
* @value: Bool value. |
* @value: Bool value. |
| 2145 |
|
* |
| 2146 |
|
* Returns "yes" if @value is not 0, "no" otherwise. |
| 2147 |
*/ |
*/ |
| 2148 |
static const char *ccs_yesno(const unsigned int value) |
static const char *ccs_yesno(const unsigned int value) |
| 2149 |
{ |
{ |
| 2151 |
} |
} |
| 2152 |
|
|
| 2153 |
/** |
/** |
| 2154 |
* ccs_io_printf - Transactional printf() to "struct ccs_io_buffer" structure. |
* ccs_addprintf - strncat()-like-snprintf(). |
| 2155 |
|
* |
| 2156 |
|
* @buffer: Buffer to write to. Must be '\0'-terminated. |
| 2157 |
|
* @len: Size of @buffer. |
| 2158 |
|
* @fmt: The printf()'s format string, followed by parameters. |
| 2159 |
|
* |
| 2160 |
|
* Returns nothing. |
| 2161 |
|
*/ |
| 2162 |
|
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
| 2163 |
|
{ |
| 2164 |
|
va_list args; |
| 2165 |
|
const int pos = strlen(buffer); |
| 2166 |
|
va_start(args, fmt); |
| 2167 |
|
vsnprintf(buffer + pos, len - pos - 1, fmt, args); |
| 2168 |
|
va_end(args); |
| 2169 |
|
} |
| 2170 |
|
|
| 2171 |
|
/** |
| 2172 |
|
* ccs_flush - Flush queued string to userspace's buffer. |
| 2173 |
* |
* |
| 2174 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
|
* @fmt: The printf()'s format string, followed by parameters. |
|
| 2175 |
* |
* |
| 2176 |
* Returns true on success, false otherwise. |
* Returns true if all data was flushed, false otherwise. |
| 2177 |
|
*/ |
| 2178 |
|
static bool ccs_flush(struct ccs_io_buffer *head) |
| 2179 |
|
{ |
| 2180 |
|
while (head->r.w_pos) { |
| 2181 |
|
const char *w = head->r.w[0]; |
| 2182 |
|
size_t len = strlen(w); |
| 2183 |
|
if (len) { |
| 2184 |
|
if (len > head->read_user_buf_avail) |
| 2185 |
|
len = head->read_user_buf_avail; |
| 2186 |
|
if (!len) |
| 2187 |
|
return false; |
| 2188 |
|
if (copy_to_user(head->read_user_buf, w, len)) |
| 2189 |
|
return false; |
| 2190 |
|
head->read_user_buf_avail -= len; |
| 2191 |
|
head->read_user_buf += len; |
| 2192 |
|
w += len; |
| 2193 |
|
} |
| 2194 |
|
head->r.w[0] = w; |
| 2195 |
|
if (*w) |
| 2196 |
|
return false; |
| 2197 |
|
/* Add '\0' for audit logs and query. */ |
| 2198 |
|
if (head->type == CCS_AUDIT || head->type == CCS_QUERY) { |
| 2199 |
|
if (!head->read_user_buf_avail || |
| 2200 |
|
copy_to_user(head->read_user_buf, "", 1)) |
| 2201 |
|
return false; |
| 2202 |
|
head->read_user_buf_avail--; |
| 2203 |
|
head->read_user_buf++; |
| 2204 |
|
} |
| 2205 |
|
head->r.w_pos--; |
| 2206 |
|
for (len = 0; len < head->r.w_pos; len++) |
| 2207 |
|
head->r.w[len] = head->r.w[len + 1]; |
| 2208 |
|
} |
| 2209 |
|
head->r.avail = 0; |
| 2210 |
|
return true; |
| 2211 |
|
} |
| 2212 |
|
|
| 2213 |
|
/** |
| 2214 |
|
* ccs_set_string - Queue string to "struct ccs_io_buffer" structure. |
| 2215 |
|
* |
| 2216 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2217 |
|
* @string: String to print. |
| 2218 |
|
* |
| 2219 |
|
* Returns nothing. |
| 2220 |
|
* |
| 2221 |
|
* Note that @string has to be kept valid until @head is kfree()d. |
| 2222 |
|
* This means that char[] allocated on stack memory cannot be passed to |
| 2223 |
|
* this function. Use ccs_io_printf() for char[] allocated on stack memory. |
| 2224 |
|
*/ |
| 2225 |
|
static void ccs_set_string(struct ccs_io_buffer *head, const char *string) |
| 2226 |
|
{ |
| 2227 |
|
if (head->r.w_pos < CCS_MAX_IO_READ_QUEUE) { |
| 2228 |
|
head->r.w[head->r.w_pos++] = string; |
| 2229 |
|
ccs_flush(head); |
| 2230 |
|
} else |
| 2231 |
|
printk(KERN_WARNING "Too many words in a line.\n"); |
| 2232 |
|
} |
| 2233 |
|
|
| 2234 |
|
/** |
| 2235 |
|
* ccs_io_printf - printf() to "struct ccs_io_buffer" structure. |
| 2236 |
|
* |
| 2237 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2238 |
|
* @fmt: The printf()'s format string, followed by parameters. |
| 2239 |
* |
* |
| 2240 |
* The snprintf() will truncate, but ccs_io_printf() won't. |
* Returns nothing. |
| 2241 |
*/ |
*/ |
| 2242 |
bool ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
| 2243 |
{ |
{ |
| 2244 |
va_list args; |
va_list args; |
| 2245 |
int len; |
size_t len; |
| 2246 |
int pos = head->read_avail; |
size_t pos = head->r.avail; |
| 2247 |
int size = head->readbuf_size - pos; |
int size = head->readbuf_size - pos; |
| 2248 |
if (size <= 0) |
if (size <= 0) |
| 2249 |
return false; |
return; |
| 2250 |
va_start(args, fmt); |
va_start(args, fmt); |
| 2251 |
len = vsnprintf(head->read_buf + pos, size, fmt, args); |
len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
| 2252 |
va_end(args); |
va_end(args); |
| 2253 |
if (pos + len >= head->readbuf_size) |
if (pos + len >= head->readbuf_size) { |
| 2254 |
return false; |
printk(KERN_WARNING "Too many words in a line.\n"); |
| 2255 |
head->read_avail += len; |
return; |
| 2256 |
return true; |
} |
| 2257 |
|
head->r.avail += len; |
| 2258 |
|
ccs_set_string(head, head->read_buf + pos); |
| 2259 |
|
} |
| 2260 |
|
|
| 2261 |
|
/** |
| 2262 |
|
* ccs_set_space - Put a space to "struct ccs_io_buffer" structure. |
| 2263 |
|
* |
| 2264 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2265 |
|
* |
| 2266 |
|
* Returns nothing. |
| 2267 |
|
*/ |
| 2268 |
|
static void ccs_set_space(struct ccs_io_buffer *head) |
| 2269 |
|
{ |
| 2270 |
|
ccs_set_string(head, " "); |
| 2271 |
} |
} |
| 2272 |
|
|
| 2273 |
/** |
/** |
| 2274 |
* ccs_find_or_assign_new_profile - Create a new profile. |
* ccs_set_lf - Put a line feed to "struct ccs_io_buffer" structure. |
| 2275 |
|
* |
| 2276 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2277 |
* |
* |
| 2278 |
|
* Returns nothing. |
| 2279 |
|
*/ |
| 2280 |
|
static bool ccs_set_lf(struct ccs_io_buffer *head) |
| 2281 |
|
{ |
| 2282 |
|
ccs_set_string(head, "\n"); |
| 2283 |
|
return !head->r.w_pos; |
| 2284 |
|
} |
| 2285 |
|
|
| 2286 |
|
/** |
| 2287 |
|
* ccs_set_slash - Put a shash to "struct ccs_io_buffer" structure. |
| 2288 |
|
* |
| 2289 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2290 |
|
* |
| 2291 |
|
* Returns nothing. |
| 2292 |
|
*/ |
| 2293 |
|
static void ccs_set_slash(struct ccs_io_buffer *head) |
| 2294 |
|
{ |
| 2295 |
|
ccs_set_string(head, "/"); |
| 2296 |
|
} |
| 2297 |
|
|
| 2298 |
|
/** |
| 2299 |
|
* ccs_init_policy_namespace - Initialize namespace. |
| 2300 |
|
* |
| 2301 |
|
* @ns: Pointer to "struct ccs_policy_namespace". |
| 2302 |
|
* |
| 2303 |
|
* Returns nothing. |
| 2304 |
|
*/ |
| 2305 |
|
static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns) |
| 2306 |
|
{ |
| 2307 |
|
unsigned int idx; |
| 2308 |
|
for (idx = 0; idx < CCS_MAX_ACL_GROUPS; idx++) |
| 2309 |
|
INIT_LIST_HEAD(&ns->acl_group[idx]); |
| 2310 |
|
for (idx = 0; idx < CCS_MAX_GROUP; idx++) |
| 2311 |
|
INIT_LIST_HEAD(&ns->group_list[idx]); |
| 2312 |
|
for (idx = 0; idx < CCS_MAX_POLICY; idx++) |
| 2313 |
|
INIT_LIST_HEAD(&ns->policy_list[idx]); |
| 2314 |
|
ns->profile_version = 20100903; |
| 2315 |
|
ccs_namespace_enabled = !list_empty(&ccs_namespace_list); |
| 2316 |
|
list_add_tail_rcu(&ns->namespace_list, &ccs_namespace_list); |
| 2317 |
|
} |
| 2318 |
|
|
| 2319 |
|
/** |
| 2320 |
|
* ccs_print_namespace - Print namespace header. |
| 2321 |
|
* |
| 2322 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2323 |
|
* |
| 2324 |
|
* Returns nothing. |
| 2325 |
|
*/ |
| 2326 |
|
static void ccs_print_namespace(struct ccs_io_buffer *head) |
| 2327 |
|
{ |
| 2328 |
|
if (!ccs_namespace_enabled) |
| 2329 |
|
return; |
| 2330 |
|
ccs_set_string(head, |
| 2331 |
|
container_of(head->r.ns, struct ccs_policy_namespace, |
| 2332 |
|
namespace_list)->name); |
| 2333 |
|
ccs_set_space(head); |
| 2334 |
|
} |
| 2335 |
|
|
| 2336 |
|
/** |
| 2337 |
|
* ccs_assign_profile - Create a new profile. |
| 2338 |
|
* |
| 2339 |
|
* @ns: Pointer to "struct ccs_policy_namespace". |
| 2340 |
* @profile: Profile number to create. |
* @profile: Profile number to create. |
| 2341 |
* |
* |
| 2342 |
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
| 2343 |
*/ |
*/ |
| 2344 |
static struct ccs_profile *ccs_find_or_assign_new_profile(const unsigned int |
static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns, |
| 2345 |
profile) |
const unsigned int profile) |
| 2346 |
{ |
{ |
| 2347 |
struct ccs_profile *ptr; |
struct ccs_profile *ptr; |
| 2348 |
struct ccs_profile *entry; |
struct ccs_profile *entry; |
| 2349 |
if (profile >= CCS_MAX_PROFILES) |
if (profile >= CCS_MAX_PROFILES) |
| 2350 |
return NULL; |
return NULL; |
| 2351 |
ptr = ccs_profile_ptr[profile]; |
ptr = ns->profile_ptr[profile]; |
| 2352 |
if (ptr) |
if (ptr) |
| 2353 |
return ptr; |
return ptr; |
| 2354 |
entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS); |
entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS); |
| 2355 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 2356 |
goto out; |
goto out; |
| 2357 |
ptr = ccs_profile_ptr[profile]; |
ptr = ns->profile_ptr[profile]; |
| 2358 |
if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
| 2359 |
ptr = entry; |
ptr = entry; |
|
ptr->audit = &ccs_default_profile.preference; |
|
|
ptr->learning = &ccs_default_profile.preference; |
|
|
ptr->permissive = &ccs_default_profile.preference; |
|
|
ptr->enforcing = &ccs_default_profile.preference; |
|
| 2360 |
ptr->default_config = CCS_CONFIG_DISABLED | |
ptr->default_config = CCS_CONFIG_DISABLED | |
| 2361 |
CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG; |
CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG; |
| 2362 |
memset(ptr->config, CCS_CONFIG_USE_DEFAULT, |
memset(ptr->config, CCS_CONFIG_USE_DEFAULT, |
| 2363 |
sizeof(ptr->config)); |
sizeof(ptr->config)); |
| 2364 |
|
ptr->pref[CCS_PREF_MAX_AUDIT_LOG] = |
| 2365 |
|
CONFIG_CCSECURITY_MAX_AUDIT_LOG; |
| 2366 |
|
ptr->pref[CCS_PREF_MAX_LEARNING_ENTRY] = |
| 2367 |
|
CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY; |
| 2368 |
mb(); /* Avoid out-of-order execution. */ |
mb(); /* Avoid out-of-order execution. */ |
| 2369 |
ccs_profile_ptr[profile] = ptr; |
ns->profile_ptr[profile] = ptr; |
| 2370 |
entry = NULL; |
entry = NULL; |
| 2371 |
} |
} |
| 2372 |
mutex_unlock(&ccs_policy_lock); |
mutex_unlock(&ccs_policy_lock); |
| 2373 |
out: |
out: |
| 2374 |
kfree(entry); |
kfree(entry); |
| 2375 |
return ptr; |
return ptr; |
| 2376 |
} |
} |
| 2377 |
|
|
| 2378 |
/** |
/** |
| 2379 |
* ccs_check_profile - Check all profiles currently assigned to domains are defined. |
* ccs_check_profile - Check all profiles currently assigned to domains are defined. |
| 2380 |
|
* |
| 2381 |
|
* Returns nothing. |
| 2382 |
*/ |
*/ |
| 2383 |
static void ccs_check_profile(void) |
static void ccs_check_profile(void) |
| 2384 |
{ |
{ |
| 2385 |
struct ccs_domain_info *domain; |
struct ccs_domain_info *domain; |
| 2386 |
const int idx = ccs_read_lock(); |
const int idx = ccs_read_lock(); |
| 2387 |
ccs_policy_loaded = true; |
ccs_policy_loaded = true; |
| 2388 |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
printk(KERN_INFO "CCSecurity: 1.8.3+ 2011/10/25\n"); |
| 2389 |
|
list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) { |
| 2390 |
const u8 profile = domain->profile; |
const u8 profile = domain->profile; |
| 2391 |
if (ccs_profile_ptr[profile]) |
const struct ccs_policy_namespace *ns = domain->ns; |
| 2392 |
|
if (ns->profile_version != 20100903) |
| 2393 |
|
printk(KERN_ERR |
| 2394 |
|
"Profile version %u is not supported.\n", |
| 2395 |
|
ns->profile_version); |
| 2396 |
|
else if (!ns->profile_ptr[profile]) |
| 2397 |
|
printk(KERN_ERR |
| 2398 |
|
"Profile %u (used by '%s') is not defined.\n", |
| 2399 |
|
profile, domain->domainname->name); |
| 2400 |
|
else |
| 2401 |
continue; |
continue; |
| 2402 |
panic("Profile %u (used by '%s') not defined.\n", |
printk(KERN_ERR |
| 2403 |
profile, domain->domainname->name); |
"Userland tools for TOMOYO 1.8 must be installed and " |
| 2404 |
|
"policy must be initialized.\n"); |
| 2405 |
|
printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/1.8/ " |
| 2406 |
|
"for more information.\n"); |
| 2407 |
|
panic("STOP!"); |
| 2408 |
} |
} |
| 2409 |
ccs_read_unlock(idx); |
ccs_read_unlock(idx); |
|
if (ccs_profile_version != 20090903) |
|
|
panic("Profile version %u is not supported.\n", |
|
|
ccs_profile_version); |
|
|
printk(KERN_INFO "CCSecurity: 1.7.2 2010/04/01\n"); |
|
| 2410 |
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
| 2411 |
} |
} |
| 2412 |
|
|
| 2417 |
* |
* |
| 2418 |
* Returns pointer to "struct ccs_profile". |
* Returns pointer to "struct ccs_profile". |
| 2419 |
*/ |
*/ |
| 2420 |
struct ccs_profile *ccs_profile(const u8 profile) |
static struct ccs_profile *ccs_profile(const u8 profile) |
| 2421 |
{ |
{ |
| 2422 |
struct ccs_profile *ptr = ccs_profile_ptr[profile]; |
static struct ccs_profile ccs_null_profile; |
| 2423 |
if (!ccs_policy_loaded) |
struct ccs_profile *ptr = ccs_current_namespace()-> |
| 2424 |
return &ccs_default_profile; |
profile_ptr[profile]; |
| 2425 |
BUG_ON(!ptr); |
if (!ptr) |
| 2426 |
|
ptr = &ccs_null_profile; |
| 2427 |
return ptr; |
return ptr; |
| 2428 |
} |
} |
| 2429 |
|
|
| 2430 |
|
|
| 2431 |
/** |
/** |
| 2432 |
* ccs_write_profile - Write profile table. |
* ccs_get_config - Get config for specified profile's specified functionality. |
| 2433 |
* |
* |
| 2434 |
* @head: Pointer to "struct ccs_io_buffer". |
* @profile: Profile number. |
| 2435 |
|
* @index: Index number of functionality. |
| 2436 |
* |
* |
| 2437 |
* Returns 0 on success, negative value otherwise. |
* Returns config. |
| 2438 |
|
* |
| 2439 |
|
* First, check for CONFIG::category::functionality. |
| 2440 |
|
* If CONFIG::category::functionality is set to use default, then check |
| 2441 |
|
* CONFIG::category. If CONFIG::category is set to use default, then use |
| 2442 |
|
* CONFIG. CONFIG cannot be set to use default. |
| 2443 |
*/ |
*/ |
| 2444 |
static int ccs_write_profile(struct ccs_io_buffer *head) |
u8 ccs_get_config(const u8 profile, const u8 index) |
| 2445 |
{ |
{ |
|
char *data = head->write_buf; |
|
|
unsigned int i; |
|
|
int value; |
|
|
int mode; |
|
| 2446 |
u8 config; |
u8 config; |
| 2447 |
bool use_default = false; |
const struct ccs_profile *p; |
| 2448 |
char *cp; |
if (!ccs_policy_loaded) |
| 2449 |
struct ccs_profile *profile; |
return CCS_CONFIG_DISABLED; |
| 2450 |
if (sscanf(data, "PROFILE_VERSION=%u", &ccs_profile_version) == 1) |
p = ccs_profile(profile); |
| 2451 |
return 0; |
config = p->config[index]; |
| 2452 |
i = simple_strtoul(data, &cp, 10); |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 2453 |
if (data == cp) { |
config = p->config[ccs_index2category[index] |
| 2454 |
profile = &ccs_default_profile; |
+ CCS_MAX_MAC_INDEX]; |
| 2455 |
} else { |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 2456 |
if (*cp != '-') |
config = p->default_config; |
| 2457 |
return -EINVAL; |
return config; |
| 2458 |
data = cp + 1; |
} |
| 2459 |
profile = ccs_find_or_assign_new_profile(i); |
|
| 2460 |
if (!profile) |
/** |
| 2461 |
return -EINVAL; |
* ccs_find_yesno - Find values for specified keyword. |
| 2462 |
} |
* |
| 2463 |
cp = strchr(data, '='); |
* @string: String to check. |
| 2464 |
if (!cp) |
* @find: Name of keyword. |
| 2465 |
return -EINVAL; |
* |
| 2466 |
*cp++ = '\0'; |
* Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. |
| 2467 |
if (profile != &ccs_default_profile) |
*/ |
| 2468 |
use_default = strstr(cp, "use_default") != NULL; |
static s8 ccs_find_yesno(const char *string, const char *find) |
| 2469 |
if (strstr(cp, "verbose=yes")) |
{ |
| 2470 |
value = 1; |
const char *cp = strstr(string, find); |
| 2471 |
else if (strstr(cp, "verbose=no")) |
if (cp) { |
| 2472 |
value = 0; |
cp += strlen(find); |
| 2473 |
else |
if (!strncmp(cp, "=yes", 4)) |
| 2474 |
value = -1; |
return 1; |
| 2475 |
if (!strcmp(data, CCS_KEYWORD_PREFERENCE_AUDIT)) { |
else if (!strncmp(cp, "=no", 3)) |
|
#ifdef CONFIG_CCSECURITY_AUDIT |
|
|
char *cp2; |
|
|
#endif |
|
|
if (use_default) { |
|
|
profile->audit = &ccs_default_profile.preference; |
|
|
return 0; |
|
|
} |
|
|
profile->audit = &profile->preference; |
|
|
#ifdef CONFIG_CCSECURITY_AUDIT |
|
|
cp2 = strstr(cp, "max_grant_log="); |
|
|
if (cp2) |
|
|
sscanf(cp2 + 14, "%u", |
|
|
&profile->preference.audit_max_grant_log); |
|
|
cp2 = strstr(cp, "max_reject_log="); |
|
|
if (cp2) |
|
|
sscanf(cp2 + 15, "%u", |
|
|
&profile->preference.audit_max_reject_log); |
|
|
#endif |
|
|
if (strstr(cp, "task_info=yes")) |
|
|
profile->preference.audit_task_info = true; |
|
|
else if (strstr(cp, "task_info=no")) |
|
|
profile->preference.audit_task_info = false; |
|
|
if (strstr(cp, "path_info=yes")) |
|
|
profile->preference.audit_path_info = true; |
|
|
else if (strstr(cp, "path_info=no")) |
|
|
profile->preference.audit_path_info = false; |
|
|
return 0; |
|
|
} |
|
|
if (!strcmp(data, CCS_KEYWORD_PREFERENCE_ENFORCING)) { |
|
|
char *cp2; |
|
|
if (use_default) { |
|
|
profile->enforcing = &ccs_default_profile.preference; |
|
|
return 0; |
|
|
} |
|
|
profile->enforcing = &profile->preference; |
|
|
if (value >= 0) |
|
|
profile->preference.enforcing_verbose = value; |
|
|
cp2 = strstr(cp, "penalty="); |
|
|
if (cp2) |
|
|
sscanf(cp2 + 8, "%u", |
|
|
&profile->preference.enforcing_penalty); |
|
|
return 0; |
|
|
} |
|
|
if (!strcmp(data, CCS_KEYWORD_PREFERENCE_PERMISSIVE)) { |
|
|
if (use_default) { |
|
|
profile->permissive = &ccs_default_profile.preference; |
|
|
return 0; |
|
|
} |
|
|
profile->permissive = &profile->preference; |
|
|
if (value >= 0) |
|
|
profile->preference.permissive_verbose = value; |
|
|
return 0; |
|
|
} |
|
|
if (!strcmp(data, CCS_KEYWORD_PREFERENCE_LEARNING)) { |
|
|
char *cp2; |
|
|
if (use_default) { |
|
|
profile->learning = &ccs_default_profile.preference; |
|
| 2476 |
return 0; |
return 0; |
|
} |
|
|
profile->learning = &profile->preference; |
|
|
if (value >= 0) |
|
|
profile->preference.learning_verbose = value; |
|
|
cp2 = strstr(cp, "max_entry="); |
|
|
if (cp2) |
|
|
sscanf(cp2 + 10, "%u", |
|
|
&profile->preference.learning_max_entry); |
|
|
if (strstr(cp, "exec.realpath=yes")) |
|
|
profile->preference.learning_exec_realpath = true; |
|
|
else if (strstr(cp, "exec.realpath=no")) |
|
|
profile->preference.learning_exec_realpath = false; |
|
|
if (strstr(cp, "exec.argv0=yes")) |
|
|
profile->preference.learning_exec_argv0 = true; |
|
|
else if (strstr(cp, "exec.argv0=no")) |
|
|
profile->preference.learning_exec_argv0 = false; |
|
|
if (strstr(cp, "symlink.target=yes")) |
|
|
profile->preference.learning_symlink_target = true; |
|
|
else if (strstr(cp, "symlink.target=no")) |
|
|
profile->preference.learning_symlink_target = false; |
|
|
return 0; |
|
| 2477 |
} |
} |
| 2478 |
if (profile == &ccs_default_profile) |
return -1; |
| 2479 |
return -EINVAL; |
} |
| 2480 |
if (!strcmp(data, "COMMENT")) { |
|
| 2481 |
const struct ccs_path_info *old_comment = profile->comment; |
/** |
| 2482 |
profile->comment = ccs_get_name(cp); |
* ccs_set_uint - Set value for specified preference. |
| 2483 |
ccs_put_name(old_comment); |
* |
| 2484 |
return 0; |
* @i: Pointer to "unsigned int". |
| 2485 |
} |
* @string: String to check. |
| 2486 |
if (!strcmp(data, "CONFIG")) { |
* @find: Name of keyword. |
| 2487 |
i = CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
* |
| 2488 |
+ CCS_MAX_MAC_CATEGORY_INDEX; |
* Returns nothing. |
| 2489 |
|
*/ |
| 2490 |
|
static void ccs_set_uint(unsigned int *i, const char *string, const char *find) |
| 2491 |
|
{ |
| 2492 |
|
const char *cp = strstr(string, find); |
| 2493 |
|
if (cp) |
| 2494 |
|
sscanf(cp + strlen(find), "=%u", i); |
| 2495 |
|
} |
| 2496 |
|
|
| 2497 |
|
/** |
| 2498 |
|
* ccs_str_starts - Check whether the given string starts with the given keyword. |
| 2499 |
|
* |
| 2500 |
|
* @src: Pointer to pointer to the string. |
| 2501 |
|
* @find: Pointer to the keyword. |
| 2502 |
|
* |
| 2503 |
|
* Returns true if @src starts with @find, false otherwise. |
| 2504 |
|
* |
| 2505 |
|
* The @src is updated to point the first character after the @find |
| 2506 |
|
* if @src starts with @find. |
| 2507 |
|
*/ |
| 2508 |
|
static bool ccs_str_starts(char **src, const char *find) |
| 2509 |
|
{ |
| 2510 |
|
const int len = strlen(find); |
| 2511 |
|
char *tmp = *src; |
| 2512 |
|
if (strncmp(tmp, find, len)) |
| 2513 |
|
return false; |
| 2514 |
|
tmp += len; |
| 2515 |
|
*src = tmp; |
| 2516 |
|
return true; |
| 2517 |
|
} |
| 2518 |
|
|
| 2519 |
|
/** |
| 2520 |
|
* ccs_set_mode - Set mode for specified profile. |
| 2521 |
|
* |
| 2522 |
|
* @name: Name of functionality. |
| 2523 |
|
* @value: Mode for @name. |
| 2524 |
|
* @profile: Pointer to "struct ccs_profile". |
| 2525 |
|
* |
| 2526 |
|
* Returns 0 on success, negative value otherwise. |
| 2527 |
|
*/ |
| 2528 |
|
static int ccs_set_mode(char *name, const char *value, |
| 2529 |
|
struct ccs_profile *profile) |
| 2530 |
|
{ |
| 2531 |
|
u8 i; |
| 2532 |
|
u8 config; |
| 2533 |
|
if (!strcmp(name, "CONFIG")) { |
| 2534 |
|
i = CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
| 2535 |
config = profile->default_config; |
config = profile->default_config; |
| 2536 |
} else if (ccs_str_starts(&data, "CONFIG::")) { |
} else if (ccs_str_starts(&name, "CONFIG::")) { |
| 2537 |
config = 0; |
config = 0; |
| 2538 |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
| 2539 |
+ CCS_MAX_MAC_CATEGORY_INDEX; i++) { |
i++) { |
| 2540 |
if (strcmp(data, ccs_mac_keywords[i])) |
int len = 0; |
| 2541 |
|
if (i < CCS_MAX_MAC_INDEX) { |
| 2542 |
|
const u8 c = ccs_index2category[i]; |
| 2543 |
|
const char *category = |
| 2544 |
|
ccs_category_keywords[c]; |
| 2545 |
|
len = strlen(category); |
| 2546 |
|
if (strncmp(name, category, len) || |
| 2547 |
|
name[len++] != ':' || name[len++] != ':') |
| 2548 |
|
continue; |
| 2549 |
|
} |
| 2550 |
|
if (strcmp(name + len, ccs_mac_keywords[i])) |
| 2551 |
continue; |
continue; |
| 2552 |
config = profile->config[i]; |
config = profile->config[i]; |
| 2553 |
break; |
break; |
| 2554 |
} |
} |
| 2555 |
if (i == CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
if (i == CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
|
+ CCS_MAX_MAC_CATEGORY_INDEX) |
|
| 2556 |
return -EINVAL; |
return -EINVAL; |
| 2557 |
} else { |
} else { |
| 2558 |
return -EINVAL; |
return -EINVAL; |
| 2559 |
} |
} |
| 2560 |
if (use_default) { |
if (strstr(value, "use_default")) { |
| 2561 |
config = CCS_CONFIG_USE_DEFAULT; |
config = CCS_CONFIG_USE_DEFAULT; |
| 2562 |
} else { |
} else { |
| 2563 |
for (mode = 3; mode >= 0; mode--) |
u8 mode; |
| 2564 |
if (strstr(cp, ccs_mode_4[mode])) |
for (mode = 0; mode < CCS_CONFIG_MAX_MODE; mode++) |
| 2565 |
|
if (strstr(value, ccs_mode[mode])) |
| 2566 |
/* |
/* |
| 2567 |
* Update lower 3 bits in order to distinguish |
* Update lower 3 bits in order to distinguish |
| 2568 |
* 'config' from 'CCS_CONFIG_USE_DEAFULT'. |
* 'config' from 'CCS_CONFIG_USE_DEAFULT'. |
| 2569 |
*/ |
*/ |
| 2570 |
config = (config & ~7) | mode; |
config = (config & ~7) | mode; |
|
#ifdef CONFIG_CCSECURITY_AUDIT |
|
| 2571 |
if (config != CCS_CONFIG_USE_DEFAULT) { |
if (config != CCS_CONFIG_USE_DEFAULT) { |
| 2572 |
if (strstr(cp, "grant_log=yes")) |
switch (ccs_find_yesno(value, "grant_log")) { |
| 2573 |
|
case 1: |
| 2574 |
config |= CCS_CONFIG_WANT_GRANT_LOG; |
config |= CCS_CONFIG_WANT_GRANT_LOG; |
| 2575 |
else if (strstr(cp, "grant_log=no")) |
break; |
| 2576 |
|
case 0: |
| 2577 |
config &= ~CCS_CONFIG_WANT_GRANT_LOG; |
config &= ~CCS_CONFIG_WANT_GRANT_LOG; |
| 2578 |
if (strstr(cp, "reject_log=yes")) |
break; |
| 2579 |
|
} |
| 2580 |
|
switch (ccs_find_yesno(value, "reject_log")) { |
| 2581 |
|
case 1: |
| 2582 |
config |= CCS_CONFIG_WANT_REJECT_LOG; |
config |= CCS_CONFIG_WANT_REJECT_LOG; |
| 2583 |
else if (strstr(cp, "reject_log=no")) |
break; |
| 2584 |
|
case 0: |
| 2585 |
config &= ~CCS_CONFIG_WANT_REJECT_LOG; |
config &= ~CCS_CONFIG_WANT_REJECT_LOG; |
| 2586 |
|
break; |
| 2587 |
|
} |
| 2588 |
} |
} |
|
#endif |
|
| 2589 |
} |
} |
| 2590 |
if (i < CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
if (i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
|
+ CCS_MAX_MAC_CATEGORY_INDEX) |
|
| 2591 |
profile->config[i] = config; |
profile->config[i] = config; |
| 2592 |
else if (config != CCS_CONFIG_USE_DEFAULT) |
else if (config != CCS_CONFIG_USE_DEFAULT) |
| 2593 |
profile->default_config = config; |
profile->default_config = config; |
| 2594 |
return 0; |
return 0; |
| 2595 |
} |
} |
| 2596 |
|
|
| 2597 |
static bool ccs_print_preference(struct ccs_io_buffer *head, const int idx) |
/** |
| 2598 |
|
* ccs_write_profile - Write profile table. |
| 2599 |
|
* |
| 2600 |
|
* @head: Pointer to "struct ccs_io_buffer". |
| 2601 |
|
* |
| 2602 |
|
* Returns 0 on success, negative value otherwise. |
| 2603 |
|
*/ |
|
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