| 1 |
/* |
| 2 |
* security/ccsecurity/policy_io.c |
| 3 |
* |
| 4 |
* Copyright (C) 2005-2012 NTT DATA CORPORATION |
| 5 |
* |
| 6 |
* Version: 1.8.3+ 2012/05/05 |
| 7 |
*/ |
| 8 |
|
| 9 |
#include "internal.h" |
| 10 |
|
| 11 |
/***** SECTION1: Constants definition *****/ |
| 12 |
|
| 13 |
/* Define this to enable debug mode. */ |
| 14 |
/* #define DEBUG_CONDITION */ |
| 15 |
|
| 16 |
#ifdef DEBUG_CONDITION |
| 17 |
#define dprintk printk |
| 18 |
#else |
| 19 |
#define dprintk(...) do { } while (0) |
| 20 |
#endif |
| 21 |
|
| 22 |
/* Mapping table from "enum ccs_mac_index" to "enum ccs_mac_category_index". */ |
| 23 |
static const u8 ccs_index2category[CCS_MAX_MAC_INDEX] = { |
| 24 |
/* CONFIG::file group */ |
| 25 |
[CCS_MAC_FILE_EXECUTE] = CCS_MAC_CATEGORY_FILE, |
| 26 |
[CCS_MAC_FILE_OPEN] = CCS_MAC_CATEGORY_FILE, |
| 27 |
[CCS_MAC_FILE_CREATE] = CCS_MAC_CATEGORY_FILE, |
| 28 |
[CCS_MAC_FILE_UNLINK] = CCS_MAC_CATEGORY_FILE, |
| 29 |
#ifdef CONFIG_CCSECURITY_FILE_GETATTR |
| 30 |
[CCS_MAC_FILE_GETATTR] = CCS_MAC_CATEGORY_FILE, |
| 31 |
#endif |
| 32 |
[CCS_MAC_FILE_MKDIR] = CCS_MAC_CATEGORY_FILE, |
| 33 |
[CCS_MAC_FILE_RMDIR] = CCS_MAC_CATEGORY_FILE, |
| 34 |
[CCS_MAC_FILE_MKFIFO] = CCS_MAC_CATEGORY_FILE, |
| 35 |
[CCS_MAC_FILE_MKSOCK] = CCS_MAC_CATEGORY_FILE, |
| 36 |
[CCS_MAC_FILE_TRUNCATE] = CCS_MAC_CATEGORY_FILE, |
| 37 |
[CCS_MAC_FILE_SYMLINK] = CCS_MAC_CATEGORY_FILE, |
| 38 |
[CCS_MAC_FILE_MKBLOCK] = CCS_MAC_CATEGORY_FILE, |
| 39 |
[CCS_MAC_FILE_MKCHAR] = CCS_MAC_CATEGORY_FILE, |
| 40 |
[CCS_MAC_FILE_LINK] = CCS_MAC_CATEGORY_FILE, |
| 41 |
[CCS_MAC_FILE_RENAME] = CCS_MAC_CATEGORY_FILE, |
| 42 |
[CCS_MAC_FILE_CHMOD] = CCS_MAC_CATEGORY_FILE, |
| 43 |
[CCS_MAC_FILE_CHOWN] = CCS_MAC_CATEGORY_FILE, |
| 44 |
[CCS_MAC_FILE_CHGRP] = CCS_MAC_CATEGORY_FILE, |
| 45 |
[CCS_MAC_FILE_IOCTL] = CCS_MAC_CATEGORY_FILE, |
| 46 |
[CCS_MAC_FILE_CHROOT] = CCS_MAC_CATEGORY_FILE, |
| 47 |
[CCS_MAC_FILE_MOUNT] = CCS_MAC_CATEGORY_FILE, |
| 48 |
[CCS_MAC_FILE_UMOUNT] = CCS_MAC_CATEGORY_FILE, |
| 49 |
[CCS_MAC_FILE_PIVOT_ROOT] = CCS_MAC_CATEGORY_FILE, |
| 50 |
#ifdef CONFIG_CCSECURITY_MISC |
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/* CONFIG::misc group */ |
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[CCS_MAC_ENVIRON] = CCS_MAC_CATEGORY_MISC, |
| 53 |
#endif |
| 54 |
#ifdef CONFIG_CCSECURITY_NETWORK |
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/* CONFIG::network group */ |
| 56 |
[CCS_MAC_NETWORK_INET_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_INET_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
| 58 |
[CCS_MAC_NETWORK_INET_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
| 59 |
[CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
| 60 |
[CCS_MAC_NETWORK_INET_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
| 61 |
[CCS_MAC_NETWORK_INET_DGRAM_SEND] = CCS_MAC_CATEGORY_NETWORK, |
| 62 |
#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
| 63 |
[CCS_MAC_NETWORK_INET_DGRAM_RECV] = CCS_MAC_CATEGORY_NETWORK, |
| 64 |
#endif |
| 65 |
[CCS_MAC_NETWORK_INET_RAW_BIND] = CCS_MAC_CATEGORY_NETWORK, |
| 66 |
[CCS_MAC_NETWORK_INET_RAW_SEND] = CCS_MAC_CATEGORY_NETWORK, |
| 67 |
#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_RAW_RECV] = CCS_MAC_CATEGORY_NETWORK, |
| 69 |
#endif |
| 70 |
[CCS_MAC_NETWORK_UNIX_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
| 72 |
[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
| 73 |
[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
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[CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK, |
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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, |
| 81 |
[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
| 82 |
[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
| 83 |
#endif |
| 84 |
#ifdef CONFIG_CCSECURITY_IPC |
| 85 |
/* CONFIG::ipc group */ |
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[CCS_MAC_SIGNAL] = CCS_MAC_CATEGORY_IPC, |
| 87 |
#endif |
| 88 |
#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 89 |
/* CONFIG::capability group */ |
| 90 |
[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY, |
| 91 |
[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY, |
| 92 |
[CCS_MAC_CAPABILITY_SYS_REBOOT] = CCS_MAC_CATEGORY_CAPABILITY, |
| 93 |
[CCS_MAC_CAPABILITY_SYS_VHANGUP] = CCS_MAC_CATEGORY_CAPABILITY, |
| 94 |
[CCS_MAC_CAPABILITY_SYS_SETTIME] = CCS_MAC_CATEGORY_CAPABILITY, |
| 95 |
[CCS_MAC_CAPABILITY_SYS_NICE] = CCS_MAC_CATEGORY_CAPABILITY, |
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[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = CCS_MAC_CATEGORY_CAPABILITY, |
| 97 |
[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = CCS_MAC_CATEGORY_CAPABILITY, |
| 98 |
[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = CCS_MAC_CATEGORY_CAPABILITY, |
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[CCS_MAC_CAPABILITY_SYS_PTRACE] = CCS_MAC_CATEGORY_CAPABILITY, |
| 100 |
#endif |
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}; |
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|
| 103 |
/* String table for operation mode. */ |
| 104 |
static const char * const ccs_mode[CCS_CONFIG_MAX_MODE] = { |
| 105 |
[CCS_CONFIG_DISABLED] = "disabled", |
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[CCS_CONFIG_LEARNING] = "learning", |
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[CCS_CONFIG_PERMISSIVE] = "permissive", |
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[CCS_CONFIG_ENFORCING] = "enforcing" |
| 109 |
}; |
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|
| 111 |
/* String table for /proc/ccs/profile interface. */ |
| 112 |
static const char * const ccs_mac_keywords[CCS_MAX_MAC_INDEX |
| 113 |
+ CCS_MAX_MAC_CATEGORY_INDEX] = { |
| 114 |
/* CONFIG::file group */ |
| 115 |
[CCS_MAC_FILE_EXECUTE] = "execute", |
| 116 |
[CCS_MAC_FILE_OPEN] = "open", |
| 117 |
[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", |
| 121 |
#endif |
| 122 |
[CCS_MAC_FILE_MKDIR] = "mkdir", |
| 123 |
[CCS_MAC_FILE_RMDIR] = "rmdir", |
| 124 |
[CCS_MAC_FILE_MKFIFO] = "mkfifo", |
| 125 |
[CCS_MAC_FILE_MKSOCK] = "mksock", |
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[CCS_MAC_FILE_TRUNCATE] = "truncate", |
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[CCS_MAC_FILE_SYMLINK] = "symlink", |
| 128 |
[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", |
| 132 |
[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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#ifdef CONFIG_CCSECURITY_MISC |
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/* CONFIG::misc group */ |
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[CCS_MAC_ENVIRON] = "env", |
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#endif |
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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", |
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[CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = "inet_stream_accept", |
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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", |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_DGRAM_RECV] = "inet_dgram_recv", |
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#endif |
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[CCS_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", |
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[CCS_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_INET_RAW_RECV] = "inet_raw_recv", |
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#endif |
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[CCS_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", |
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[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", |
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[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", |
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[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = "unix_stream_accept", |
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[CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", |
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[CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", |
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#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
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[CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = "unix_dgram_recv", |
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#endif |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", |
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[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = "unix_seqpacket_accept", |
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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] = "signal", |
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#endif |
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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] = "use_route", |
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[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = "use_packet", |
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[CCS_MAC_CAPABILITY_SYS_REBOOT] = "SYS_REBOOT", |
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[CCS_MAC_CAPABILITY_SYS_VHANGUP] = "SYS_VHANGUP", |
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[CCS_MAC_CAPABILITY_SYS_SETTIME] = "SYS_TIME", |
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[CCS_MAC_CAPABILITY_SYS_NICE] = "SYS_NICE", |
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[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
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[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = "use_kernel_module", |
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[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
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[CCS_MAC_CAPABILITY_SYS_PTRACE] = "SYS_PTRACE", |
| 190 |
#endif |
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/* CONFIG group */ |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_FILE] = "file", |
| 193 |
#ifdef CONFIG_CCSECURITY_NETWORK |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_NETWORK] = "network", |
| 195 |
#endif |
| 196 |
#ifdef CONFIG_CCSECURITY_MISC |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_MISC] = "misc", |
| 198 |
#endif |
| 199 |
#ifdef CONFIG_CCSECURITY_IPC |
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[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_IPC] = "ipc", |
| 201 |
#endif |
| 202 |
#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 203 |
[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
| 204 |
#endif |
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}; |
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|
| 207 |
/* String table for path operation. */ |
| 208 |
static const char * const ccs_path_keyword[CCS_MAX_PATH_OPERATION] = { |
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[CCS_TYPE_EXECUTE] = "execute", |
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[CCS_TYPE_READ] = "read", |
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[CCS_TYPE_WRITE] = "write", |
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[CCS_TYPE_APPEND] = "append", |
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[CCS_TYPE_UNLINK] = "unlink", |
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#ifdef CONFIG_CCSECURITY_FILE_GETATTR |
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[CCS_TYPE_GETATTR] = "getattr", |
| 216 |
#endif |
| 217 |
[CCS_TYPE_RMDIR] = "rmdir", |
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[CCS_TYPE_TRUNCATE] = "truncate", |
| 219 |
[CCS_TYPE_SYMLINK] = "symlink", |
| 220 |
[CCS_TYPE_CHROOT] = "chroot", |
| 221 |
[CCS_TYPE_UMOUNT] = "unmount", |
| 222 |
}; |
| 223 |
|
| 224 |
#ifdef CONFIG_CCSECURITY_NETWORK |
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|
| 226 |
/* String table for socket's operation. */ |
| 227 |
static const char * const ccs_socket_keyword[CCS_MAX_NETWORK_OPERATION] = { |
| 228 |
[CCS_NETWORK_BIND] = "bind", |
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[CCS_NETWORK_LISTEN] = "listen", |
| 230 |
[CCS_NETWORK_CONNECT] = "connect", |
| 231 |
[CCS_NETWORK_ACCEPT] = "accept", |
| 232 |
[CCS_NETWORK_SEND] = "send", |
| 233 |
#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG |
| 234 |
[CCS_NETWORK_RECV] = "recv", |
| 235 |
#endif |
| 236 |
}; |
| 237 |
|
| 238 |
/* String table for socket's protocols. */ |
| 239 |
static const char * const ccs_proto_keyword[CCS_SOCK_MAX] = { |
| 240 |
[SOCK_STREAM] = "stream", |
| 241 |
[SOCK_DGRAM] = "dgram", |
| 242 |
[SOCK_RAW] = "raw", |
| 243 |
[SOCK_SEQPACKET] = "seqpacket", |
| 244 |
[0] = " ", /* Dummy for avoiding NULL pointer dereference. */ |
| 245 |
[4] = " ", /* Dummy for avoiding NULL pointer dereference. */ |
| 246 |
}; |
| 247 |
|
| 248 |
#endif |
| 249 |
|
| 250 |
/* String table for categories. */ |
| 251 |
static const char * const ccs_category_keywords[CCS_MAX_MAC_CATEGORY_INDEX] = { |
| 252 |
[CCS_MAC_CATEGORY_FILE] = "file", |
| 253 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 254 |
[CCS_MAC_CATEGORY_NETWORK] = "network", |
| 255 |
#endif |
| 256 |
#ifdef CONFIG_CCSECURITY_MISC |
| 257 |
[CCS_MAC_CATEGORY_MISC] = "misc", |
| 258 |
#endif |
| 259 |
#ifdef CONFIG_CCSECURITY_IPC |
| 260 |
[CCS_MAC_CATEGORY_IPC] = "ipc", |
| 261 |
#endif |
| 262 |
#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 263 |
[CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
| 264 |
#endif |
| 265 |
}; |
| 266 |
|
| 267 |
/* String table for conditions. */ |
| 268 |
static const char * const ccs_condition_keyword[CCS_MAX_CONDITION_KEYWORD] = { |
| 269 |
[CCS_TASK_UID] = "task.uid", |
| 270 |
[CCS_TASK_EUID] = "task.euid", |
| 271 |
[CCS_TASK_SUID] = "task.suid", |
| 272 |
[CCS_TASK_FSUID] = "task.fsuid", |
| 273 |
[CCS_TASK_GID] = "task.gid", |
| 274 |
[CCS_TASK_EGID] = "task.egid", |
| 275 |
[CCS_TASK_SGID] = "task.sgid", |
| 276 |
[CCS_TASK_FSGID] = "task.fsgid", |
| 277 |
[CCS_TASK_PID] = "task.pid", |
| 278 |
[CCS_TASK_PPID] = "task.ppid", |
| 279 |
[CCS_EXEC_ARGC] = "exec.argc", |
| 280 |
[CCS_EXEC_ENVC] = "exec.envc", |
| 281 |
[CCS_TYPE_IS_SOCKET] = "socket", |
| 282 |
[CCS_TYPE_IS_SYMLINK] = "symlink", |
| 283 |
[CCS_TYPE_IS_FILE] = "file", |
| 284 |
[CCS_TYPE_IS_BLOCK_DEV] = "block", |
| 285 |
[CCS_TYPE_IS_DIRECTORY] = "directory", |
| 286 |
[CCS_TYPE_IS_CHAR_DEV] = "char", |
| 287 |
[CCS_TYPE_IS_FIFO] = "fifo", |
| 288 |
[CCS_MODE_SETUID] = "setuid", |
| 289 |
[CCS_MODE_SETGID] = "setgid", |
| 290 |
[CCS_MODE_STICKY] = "sticky", |
| 291 |
[CCS_MODE_OWNER_READ] = "owner_read", |
| 292 |
[CCS_MODE_OWNER_WRITE] = "owner_write", |
| 293 |
[CCS_MODE_OWNER_EXECUTE] = "owner_execute", |
| 294 |
[CCS_MODE_GROUP_READ] = "group_read", |
| 295 |
[CCS_MODE_GROUP_WRITE] = "group_write", |
| 296 |
[CCS_MODE_GROUP_EXECUTE] = "group_execute", |
| 297 |
[CCS_MODE_OTHERS_READ] = "others_read", |
| 298 |
[CCS_MODE_OTHERS_WRITE] = "others_write", |
| 299 |
[CCS_MODE_OTHERS_EXECUTE] = "others_execute", |
| 300 |
[CCS_TASK_TYPE] = "task.type", |
| 301 |
[CCS_TASK_EXECUTE_HANDLER] = "execute_handler", |
| 302 |
[CCS_EXEC_REALPATH] = "exec.realpath", |
| 303 |
[CCS_SYMLINK_TARGET] = "symlink.target", |
| 304 |
[CCS_PATH1_UID] = "path1.uid", |
| 305 |
[CCS_PATH1_GID] = "path1.gid", |
| 306 |
[CCS_PATH1_INO] = "path1.ino", |
| 307 |
[CCS_PATH1_MAJOR] = "path1.major", |
| 308 |
[CCS_PATH1_MINOR] = "path1.minor", |
| 309 |
[CCS_PATH1_PERM] = "path1.perm", |
| 310 |
[CCS_PATH1_TYPE] = "path1.type", |
| 311 |
[CCS_PATH1_DEV_MAJOR] = "path1.dev_major", |
| 312 |
[CCS_PATH1_DEV_MINOR] = "path1.dev_minor", |
| 313 |
[CCS_PATH2_UID] = "path2.uid", |
| 314 |
[CCS_PATH2_GID] = "path2.gid", |
| 315 |
[CCS_PATH2_INO] = "path2.ino", |
| 316 |
[CCS_PATH2_MAJOR] = "path2.major", |
| 317 |
[CCS_PATH2_MINOR] = "path2.minor", |
| 318 |
[CCS_PATH2_PERM] = "path2.perm", |
| 319 |
[CCS_PATH2_TYPE] = "path2.type", |
| 320 |
[CCS_PATH2_DEV_MAJOR] = "path2.dev_major", |
| 321 |
[CCS_PATH2_DEV_MINOR] = "path2.dev_minor", |
| 322 |
[CCS_PATH1_PARENT_UID] = "path1.parent.uid", |
| 323 |
[CCS_PATH1_PARENT_GID] = "path1.parent.gid", |
| 324 |
[CCS_PATH1_PARENT_INO] = "path1.parent.ino", |
| 325 |
[CCS_PATH1_PARENT_PERM] = "path1.parent.perm", |
| 326 |
[CCS_PATH2_PARENT_UID] = "path2.parent.uid", |
| 327 |
[CCS_PATH2_PARENT_GID] = "path2.parent.gid", |
| 328 |
[CCS_PATH2_PARENT_INO] = "path2.parent.ino", |
| 329 |
[CCS_PATH2_PARENT_PERM] = "path2.parent.perm", |
| 330 |
}; |
| 331 |
|
| 332 |
/* String table for PREFERENCE keyword. */ |
| 333 |
static const char * const ccs_pref_keywords[CCS_MAX_PREF] = { |
| 334 |
[CCS_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
| 335 |
[CCS_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
| 336 |
[CCS_PREF_ENFORCING_PENALTY] = "enforcing_penalty", |
| 337 |
}; |
| 338 |
|
| 339 |
/* String table for domain flags. */ |
| 340 |
const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS] = { |
| 341 |
[CCS_DIF_QUOTA_WARNED] = "quota_exceeded\n", |
| 342 |
[CCS_DIF_TRANSITION_FAILED] = "transition_failed\n", |
| 343 |
}; |
| 344 |
|
| 345 |
/* String table for domain transition control keywords. */ |
| 346 |
static const char * const ccs_transition_type[CCS_MAX_TRANSITION_TYPE] = { |
| 347 |
[CCS_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
| 348 |
[CCS_TRANSITION_CONTROL_RESET] = "reset_domain ", |
| 349 |
[CCS_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", |
| 350 |
[CCS_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", |
| 351 |
[CCS_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", |
| 352 |
[CCS_TRANSITION_CONTROL_KEEP] = "keep_domain ", |
| 353 |
}; |
| 354 |
|
| 355 |
/* String table for grouping keywords. */ |
| 356 |
static const char * const ccs_group_name[CCS_MAX_GROUP] = { |
| 357 |
[CCS_PATH_GROUP] = "path_group ", |
| 358 |
[CCS_NUMBER_GROUP] = "number_group ", |
| 359 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 360 |
[CCS_ADDRESS_GROUP] = "address_group ", |
| 361 |
#endif |
| 362 |
}; |
| 363 |
|
| 364 |
/* String table for /proc/ccs/stat interface. */ |
| 365 |
static const char * const ccs_policy_headers[CCS_MAX_POLICY_STAT] = { |
| 366 |
[CCS_STAT_POLICY_UPDATES] = "update:", |
| 367 |
[CCS_STAT_POLICY_LEARNING] = "violation in learning mode:", |
| 368 |
[CCS_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", |
| 369 |
[CCS_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", |
| 370 |
}; |
| 371 |
|
| 372 |
/* String table for /proc/ccs/stat interface. */ |
| 373 |
static const char * const ccs_memory_headers[CCS_MAX_MEMORY_STAT] = { |
| 374 |
[CCS_MEMORY_POLICY] = "policy:", |
| 375 |
[CCS_MEMORY_AUDIT] = "audit log:", |
| 376 |
[CCS_MEMORY_QUERY] = "query message:", |
| 377 |
}; |
| 378 |
|
| 379 |
/***** SECTION2: Structure definition *****/ |
| 380 |
|
| 381 |
struct iattr; |
| 382 |
|
| 383 |
/* Structure for query. */ |
| 384 |
struct ccs_query { |
| 385 |
struct list_head list; |
| 386 |
struct ccs_domain_info *domain; |
| 387 |
char *query; |
| 388 |
size_t query_len; |
| 389 |
unsigned int serial; |
| 390 |
u8 timer; |
| 391 |
u8 answer; |
| 392 |
u8 retry; |
| 393 |
}; |
| 394 |
|
| 395 |
/* Structure for audit log. */ |
| 396 |
struct ccs_log { |
| 397 |
struct list_head list; |
| 398 |
char *log; |
| 399 |
int size; |
| 400 |
}; |
| 401 |
|
| 402 |
/***** SECTION3: Prototype definition section *****/ |
| 403 |
|
| 404 |
int ccs_audit_log(struct ccs_request_info *r); |
| 405 |
struct ccs_domain_info *ccs_assign_domain(const char *domainname, |
| 406 |
const bool transit); |
| 407 |
u8 ccs_get_config(const u8 profile, const u8 index); |
| 408 |
void ccs_transition_failed(const char *domainname); |
| 409 |
void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...); |
| 410 |
|
| 411 |
static bool ccs_correct_domain(const unsigned char *domainname); |
| 412 |
static bool ccs_correct_path(const char *filename); |
| 413 |
static bool ccs_correct_word(const char *string); |
| 414 |
static bool ccs_correct_word2(const char *string, size_t len); |
| 415 |
static bool ccs_domain_def(const unsigned char *buffer); |
| 416 |
static bool ccs_domain_quota_ok(struct ccs_request_info *r); |
| 417 |
static bool ccs_flush(struct ccs_io_buffer *head); |
| 418 |
static bool ccs_get_audit(const struct ccs_request_info *r); |
| 419 |
static bool ccs_has_more_namespace(struct ccs_io_buffer *head); |
| 420 |
static bool ccs_manager(void); |
| 421 |
static bool ccs_namespace_jump(const char *domainname); |
| 422 |
static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv); |
| 423 |
static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp); |
| 424 |
static bool ccs_parse_name_union(struct ccs_acl_param *param, |
| 425 |
struct ccs_name_union *ptr); |
| 426 |
static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param, |
| 427 |
struct ccs_name_union *ptr); |
| 428 |
static bool ccs_parse_number_union(struct ccs_acl_param *param, |
| 429 |
struct ccs_number_union *ptr); |
| 430 |
static bool ccs_permstr(const char *string, const char *keyword); |
| 431 |
static bool ccs_print_condition(struct ccs_io_buffer *head, |
| 432 |
const struct ccs_condition *cond); |
| 433 |
static bool ccs_print_entry(struct ccs_io_buffer *head, |
| 434 |
const struct ccs_acl_info *acl); |
| 435 |
static bool ccs_print_group(struct ccs_io_buffer *head, |
| 436 |
const struct ccs_group *group); |
| 437 |
static bool ccs_read_acl(struct ccs_io_buffer *head, struct list_head *list); |
| 438 |
static bool ccs_read_group(struct ccs_io_buffer *head, const int idx); |
| 439 |
static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx); |
| 440 |
static bool ccs_same_condition(const struct ccs_condition *a, |
| 441 |
const struct ccs_condition *b); |
| 442 |
static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data); |
| 443 |
static bool ccs_set_lf(struct ccs_io_buffer *head); |
| 444 |
static bool ccs_str_starts(char **src, const char *find); |
| 445 |
static char *ccs_get_transit_preference(struct ccs_acl_param *param, |
| 446 |
struct ccs_condition *e); |
| 447 |
static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt, |
| 448 |
va_list args); |
| 449 |
static char *ccs_print_bprm(struct linux_binprm *bprm, |
| 450 |
struct ccs_page_dump *dump); |
| 451 |
static char *ccs_print_header(struct ccs_request_info *r); |
| 452 |
static char *ccs_read_token(struct ccs_acl_param *param); |
| 453 |
static const char *ccs_yesno(const unsigned int value); |
| 454 |
static const struct ccs_path_info *ccs_get_domainname |
| 455 |
(struct ccs_acl_param *param); |
| 456 |
static const struct ccs_path_info *ccs_get_dqword(char *start); |
| 457 |
static int __init ccs_init_module(void); |
| 458 |
static int ccs_delete_domain(char *domainname); |
| 459 |
static int ccs_open(struct inode *inode, struct file *file); |
| 460 |
static int ccs_parse_policy(struct ccs_io_buffer *head, char *line); |
| 461 |
static int ccs_release(struct inode *inode, struct file *file); |
| 462 |
static int ccs_set_mode(char *name, const char *value, |
| 463 |
struct ccs_profile *profile); |
| 464 |
static int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
| 465 |
__printf(2, 3); |
| 466 |
static int ccs_truncate(char *str); |
| 467 |
static int ccs_update_acl(const int size, struct ccs_acl_param *param); |
| 468 |
static int ccs_update_manager_entry(const char *manager, const bool is_delete); |
| 469 |
static int ccs_update_policy(const int size, struct ccs_acl_param *param); |
| 470 |
static int ccs_write_acl(struct ccs_policy_namespace *ns, |
| 471 |
struct list_head *list, char *data, |
| 472 |
const bool is_delete); |
| 473 |
static int ccs_write_aggregator(struct ccs_acl_param *param); |
| 474 |
static int ccs_write_answer(struct ccs_io_buffer *head); |
| 475 |
static int ccs_write_domain(struct ccs_io_buffer *head); |
| 476 |
static int ccs_write_exception(struct ccs_io_buffer *head); |
| 477 |
static int ccs_write_file(struct ccs_acl_param *param); |
| 478 |
static int ccs_write_group(struct ccs_acl_param *param, const u8 type); |
| 479 |
static int ccs_write_manager(struct ccs_io_buffer *head); |
| 480 |
static int ccs_write_pid(struct ccs_io_buffer *head); |
| 481 |
static int ccs_write_profile(struct ccs_io_buffer *head); |
| 482 |
static int ccs_write_stat(struct ccs_io_buffer *head); |
| 483 |
static int ccs_write_task(struct ccs_acl_param *param); |
| 484 |
static int ccs_write_transition_control(struct ccs_acl_param *param, |
| 485 |
const u8 type); |
| 486 |
static s8 ccs_find_yesno(const char *string, const char *find); |
| 487 |
static ssize_t ccs_read(struct file *file, char __user *buf, size_t count, |
| 488 |
loff_t *ppos); |
| 489 |
static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count, |
| 490 |
loff_t *ppos); |
| 491 |
static ssize_t ccs_write(struct file *file, const char __user *buf, |
| 492 |
size_t count, loff_t *ppos); |
| 493 |
static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry); |
| 494 |
static struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param); |
| 495 |
static struct ccs_domain_info *ccs_find_domain(const char *domainname); |
| 496 |
static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial); |
| 497 |
static struct ccs_group *ccs_get_group(struct ccs_acl_param *param, |
| 498 |
const u8 idx); |
| 499 |
static struct ccs_policy_namespace *ccs_assign_namespace |
| 500 |
(const char *domainname); |
| 501 |
static struct ccs_policy_namespace *ccs_find_namespace(const char *name, |
| 502 |
const unsigned int len); |
| 503 |
static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns, |
| 504 |
const unsigned int profile); |
| 505 |
static struct ccs_profile *ccs_profile(const u8 profile); |
| 506 |
static u8 ccs_condition_type(const char *word); |
| 507 |
static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3); |
| 508 |
static u8 ccs_parse_ulong(unsigned long *result, char **str); |
| 509 |
static unsigned int ccs_poll(struct file *file, poll_table *wait); |
| 510 |
static void __init ccs_create_entry(const char *name, const umode_t mode, |
| 511 |
struct proc_dir_entry *parent, |
| 512 |
const u8 key); |
| 513 |
static void __init ccs_load_builtin_policy(void); |
| 514 |
static void __init ccs_policy_io_init(void); |
| 515 |
static void __init ccs_proc_init(void); |
| 516 |
static void ccs_add_entry(char *header); |
| 517 |
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
| 518 |
__printf(3, 4); |
| 519 |
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...); |
| 520 |
static void ccs_check_profile(void); |
| 521 |
static void ccs_convert_time(time_t time, struct ccs_time *stamp); |
| 522 |
static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns); |
| 523 |
static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
| 524 |
__printf(2, 3); |
| 525 |
static void ccs_normalize_line(unsigned char *buffer); |
| 526 |
static void ccs_print_config(struct ccs_io_buffer *head, const u8 config); |
| 527 |
static void ccs_print_name_union(struct ccs_io_buffer *head, |
| 528 |
const struct ccs_name_union *ptr); |
| 529 |
static void ccs_print_name_union_quoted(struct ccs_io_buffer *head, |
| 530 |
const struct ccs_name_union *ptr); |
| 531 |
static void ccs_print_namespace(struct ccs_io_buffer *head); |
| 532 |
static void ccs_print_number_union(struct ccs_io_buffer *head, |
| 533 |
const struct ccs_number_union *ptr); |
| 534 |
static void ccs_print_number_union_nospace(struct ccs_io_buffer *head, |
| 535 |
const struct ccs_number_union *ptr); |
| 536 |
static void ccs_read_domain(struct ccs_io_buffer *head); |
| 537 |
static void ccs_read_exception(struct ccs_io_buffer *head); |
| 538 |
static void ccs_read_log(struct ccs_io_buffer *head); |
| 539 |
static void ccs_read_manager(struct ccs_io_buffer *head); |
| 540 |
static void ccs_read_pid(struct ccs_io_buffer *head); |
| 541 |
static void ccs_read_profile(struct ccs_io_buffer *head); |
| 542 |
static void ccs_read_query(struct ccs_io_buffer *head); |
| 543 |
static void ccs_read_stat(struct ccs_io_buffer *head); |
| 544 |
static void ccs_read_version(struct ccs_io_buffer *head); |
| 545 |
static void ccs_set_group(struct ccs_io_buffer *head, const char *category); |
| 546 |
static void ccs_set_namespace_cursor(struct ccs_io_buffer *head); |
| 547 |
static void ccs_set_slash(struct ccs_io_buffer *head); |
| 548 |
static void ccs_set_space(struct ccs_io_buffer *head); |
| 549 |
static void ccs_set_string(struct ccs_io_buffer *head, const char *string); |
| 550 |
static void ccs_set_uint(unsigned int *i, const char *string, |
| 551 |
const char *find); |
| 552 |
static void ccs_update_stat(const u8 index); |
| 553 |
static void ccs_update_task_domain(struct ccs_request_info *r); |
| 554 |
static void ccs_write_log2(struct ccs_request_info *r, int len, |
| 555 |
const char *fmt, va_list args); |
| 556 |
|
| 557 |
#ifdef CONFIG_CCSECURITY_PORTRESERVE |
| 558 |
static bool __ccs_lport_reserved(const u16 port); |
| 559 |
static int ccs_write_reserved_port(struct ccs_acl_param *param); |
| 560 |
#endif |
| 561 |
|
| 562 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 563 |
static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param, |
| 564 |
struct ccs_ipaddr_union *ptr); |
| 565 |
static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len, |
| 566 |
const u32 *ip); |
| 567 |
static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len, |
| 568 |
const struct in6_addr *ip); |
| 569 |
static int ccs_write_inet_network(struct ccs_acl_param *param); |
| 570 |
static int ccs_write_unix_network(struct ccs_acl_param *param); |
| 571 |
static void ccs_print_ip(char *buf, const unsigned int size, |
| 572 |
const struct ccs_ipaddr_union *ptr); |
| 573 |
#endif |
| 574 |
|
| 575 |
#ifdef CONFIG_CCSECURITY_CAPABILITY |
| 576 |
static int ccs_write_capability(struct ccs_acl_param *param); |
| 577 |
#endif |
| 578 |
|
| 579 |
#ifdef CONFIG_CCSECURITY_MISC |
| 580 |
static int ccs_write_misc(struct ccs_acl_param *param); |
| 581 |
#endif |
| 582 |
|
| 583 |
#ifdef CONFIG_CCSECURITY_IPC |
| 584 |
static int ccs_write_ipc(struct ccs_acl_param *param); |
| 585 |
#endif |
| 586 |
|
| 587 |
#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION |
| 588 |
static ssize_t ccs_write_self(struct file *file, const char __user *buf, |
| 589 |
size_t count, loff_t *ppos); |
| 590 |
#endif |
| 591 |
|
| 592 |
/***** SECTION4: Standalone functions section *****/ |
| 593 |
|
| 594 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) |
| 595 |
|
| 596 |
/** |
| 597 |
* fatal_signal_pending - Check whether SIGKILL is pending or not. |
| 598 |
* |
| 599 |
* @p: Pointer to "struct task_struct". |
| 600 |
* |
| 601 |
* Returns true if SIGKILL is pending on @p, false otherwise. |
| 602 |
* |
| 603 |
* This is for compatibility with older kernels. |
| 604 |
*/ |
| 605 |
#define fatal_signal_pending(p) (signal_pending(p) && \ |
| 606 |
sigismember(&p->pending.signal, SIGKILL)) |
| 607 |
|
| 608 |
#endif |
| 609 |
|
| 610 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 611 |
|
| 612 |
/** |
| 613 |
* __wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
| 614 |
* |
| 615 |
* @wq: The waitqueue to wait on. |
| 616 |
* @condition: A C expression for the event to wait for. |
| 617 |
* @ret: Timeout, in jiffies. |
| 618 |
* |
| 619 |
* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
| 620 |
* signal, and the remaining jiffies otherwise if the condition evaluated to |
| 621 |
* true before the timeout elapsed. |
| 622 |
* |
| 623 |
* This is for compatibility with older kernels. |
| 624 |
*/ |
| 625 |
#define __wait_event_interruptible_timeout(wq, condition, ret) \ |
| 626 |
do { \ |
| 627 |
wait_queue_t __wait; \ |
| 628 |
init_waitqueue_entry(&__wait, current); \ |
| 629 |
\ |
| 630 |
add_wait_queue(&wq, &__wait); \ |
| 631 |
for (;;) { \ |
| 632 |
set_current_state(TASK_INTERRUPTIBLE); \ |
| 633 |
if (condition) \ |
| 634 |
break; \ |
| 635 |
if (!signal_pending(current)) { \ |
| 636 |
ret = schedule_timeout(ret); \ |
| 637 |
if (!ret) \ |
| 638 |
break; \ |
| 639 |
continue; \ |
| 640 |
} \ |
| 641 |
ret = -ERESTARTSYS; \ |
| 642 |
break; \ |
| 643 |
} \ |
| 644 |
current->state = TASK_RUNNING; \ |
| 645 |
remove_wait_queue(&wq, &__wait); \ |
| 646 |
} while (0) |
| 647 |
|
| 648 |
/** |
| 649 |
* wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses. |
| 650 |
* |
| 651 |
* @wq: The waitqueue to wait on. |
| 652 |
* @condition: A C expression for the event to wait for. |
| 653 |
* @timeout: Timeout, in jiffies. |
| 654 |
* |
| 655 |
* Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a |
| 656 |
* signal, and the remaining jiffies otherwise if the condition evaluated to |
| 657 |
* true before the timeout elapsed. |
| 658 |
* |
| 659 |
* This is for compatibility with older kernels. |
| 660 |
*/ |
| 661 |
#define wait_event_interruptible_timeout(wq, condition, timeout) \ |
| 662 |
({ \ |
| 663 |
long __ret = timeout; \ |
| 664 |
if (!(condition)) \ |
| 665 |
__wait_event_interruptible_timeout(wq, condition, __ret); \ |
| 666 |
__ret; \ |
| 667 |
}) |
| 668 |
|
| 669 |
#endif |
| 670 |
|
| 671 |
/** |
| 672 |
* ccs_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss. |
| 673 |
* |
| 674 |
* @time: Seconds since 1970/01/01 00:00:00. |
| 675 |
* @stamp: Pointer to "struct ccs_time". |
| 676 |
* |
| 677 |
* Returns nothing. |
| 678 |
* |
| 679 |
* This function does not handle Y2038 problem. |
| 680 |
*/ |
| 681 |
static void ccs_convert_time(time_t time, struct ccs_time *stamp) |
| 682 |
{ |
| 683 |
static const u16 ccs_eom[2][12] = { |
| 684 |
{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
| 685 |
{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
| 686 |
}; |
| 687 |
u16 y; |
| 688 |
u8 m; |
| 689 |
bool r; |
| 690 |
stamp->sec = time % 60; |
| 691 |
time /= 60; |
| 692 |
stamp->min = time % 60; |
| 693 |
time /= 60; |
| 694 |
stamp->hour = time % 24; |
| 695 |
time /= 24; |
| 696 |
for (y = 1970; ; y++) { |
| 697 |
const unsigned short days = (y & 3) ? 365 : 366; |
| 698 |
if (time < days) |
| 699 |
break; |
| 700 |
time -= days; |
| 701 |
} |
| 702 |
r = (y & 3) == 0; |
| 703 |
for (m = 0; m < 11 && time >= ccs_eom[r][m]; m++); |
| 704 |
if (m) |
| 705 |
time -= ccs_eom[r][m - 1]; |
| 706 |
stamp->year = y; |
| 707 |
stamp->month = ++m; |
| 708 |
stamp->day = ++time; |
| 709 |
} |
| 710 |
|
| 711 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 23) |
| 712 |
#if !defined(RHEL_VERSION) || RHEL_VERSION != 3 |
| 713 |
|
| 714 |
/** |
| 715 |
* PDE - Get "struct proc_dir_entry". |
| 716 |
* |
| 717 |
* @inode: Pointer to "struct inode". |
| 718 |
* |
| 719 |
* Returns pointer to "struct proc_dir_entry". |
| 720 |
* |
| 721 |
* This is for compatibility with older kernels. |
| 722 |
*/ |
| 723 |
static inline struct proc_dir_entry *PDE(const struct inode *inode) |
| 724 |
{ |
| 725 |
return (struct proc_dir_entry *) inode->u.generic_ip; |
| 726 |
} |
| 727 |
|
| 728 |
#endif |
| 729 |
#endif |
| 730 |
|
| 731 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 732 |
|
| 733 |
/** |
| 734 |
* proc_notify_change - Update inode's attributes and reflect to the dentry. |
| 735 |
* |
| 736 |
* @dentry: Pointer to "struct dentry". |
| 737 |
* @iattr: Pointer to "struct iattr". |
| 738 |
* |
| 739 |
* Returns 0 on success, negative value otherwise. |
| 740 |
* |
| 741 |
* The 2.4 kernels don't allow chmod()/chown() for files in /proc, |
| 742 |
* while the 2.6 kernels allow. |
| 743 |
* To permit management of /proc/ccs/ interface by non-root user, |
| 744 |
* I modified to allow chmod()/chown() of /proc/ccs/ interface like 2.6 kernels |
| 745 |
* by adding "struct inode_operations"->setattr hook. |
| 746 |
*/ |
| 747 |
static int proc_notify_change(struct dentry *dentry, struct iattr *iattr) |
| 748 |
{ |
| 749 |
struct inode *inode = dentry->d_inode; |
| 750 |
struct proc_dir_entry *de = PDE(inode); |
| 751 |
int error; |
| 752 |
|
| 753 |
error = inode_change_ok(inode, iattr); |
| 754 |
if (error) |
| 755 |
goto out; |
| 756 |
|
| 757 |
error = inode_setattr(inode, iattr); |
| 758 |
if (error) |
| 759 |
goto out; |
| 760 |
|
| 761 |
de->uid = inode->i_uid; |
| 762 |
de->gid = inode->i_gid; |
| 763 |
de->mode = inode->i_mode; |
| 764 |
out: |
| 765 |
return error; |
| 766 |
} |
| 767 |
|
| 768 |
#endif |
| 769 |
|
| 770 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 771 |
|
| 772 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) && defined(CONFIG_NET) |
| 773 |
#define ccs_in4_pton in4_pton |
| 774 |
#define ccs_in6_pton in6_pton |
| 775 |
#else |
| 776 |
/* |
| 777 |
* Routines for parsing IPv4 or IPv6 address. |
| 778 |
* These are copied from lib/hexdump.c net/core/utils.c . |
| 779 |
*/ |
| 780 |
#include <linux/ctype.h> |
| 781 |
|
| 782 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35) |
| 783 |
static int hex_to_bin(char ch) |
| 784 |
{ |
| 785 |
if ((ch >= '0') && (ch <= '9')) |
| 786 |
return ch - '0'; |
| 787 |
ch = tolower(ch); |
| 788 |
if ((ch >= 'a') && (ch <= 'f')) |
| 789 |
return ch - 'a' + 10; |
| 790 |
return -1; |
| 791 |
} |
| 792 |
#endif |
| 793 |
|
| 794 |
#define IN6PTON_XDIGIT 0x00010000 |
| 795 |
#define IN6PTON_DIGIT 0x00020000 |
| 796 |
#define IN6PTON_COLON_MASK 0x00700000 |
| 797 |
#define IN6PTON_COLON_1 0x00100000 /* single : requested */ |
| 798 |
#define IN6PTON_COLON_2 0x00200000 /* second : requested */ |
| 799 |
#define IN6PTON_COLON_1_2 0x00400000 /* :: requested */ |
| 800 |
#define IN6PTON_DOT 0x00800000 /* . */ |
| 801 |
#define IN6PTON_DELIM 0x10000000 |
| 802 |
#define IN6PTON_NULL 0x20000000 /* first/tail */ |
| 803 |
#define IN6PTON_UNKNOWN 0x40000000 |
| 804 |
|
| 805 |
static inline int xdigit2bin(char c, int delim) |
| 806 |
{ |
| 807 |
int val; |
| 808 |
|
| 809 |
if (c == delim || c == '\0') |
| 810 |
return IN6PTON_DELIM; |
| 811 |
if (c == ':') |
| 812 |
return IN6PTON_COLON_MASK; |
| 813 |
if (c == '.') |
| 814 |
return IN6PTON_DOT; |
| 815 |
|
| 816 |
val = hex_to_bin(c); |
| 817 |
if (val >= 0) |
| 818 |
return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0); |
| 819 |
|
| 820 |
if (delim == -1) |
| 821 |
return IN6PTON_DELIM; |
| 822 |
return IN6PTON_UNKNOWN; |
| 823 |
} |
| 824 |
|
| 825 |
static int ccs_in4_pton(const char *src, int srclen, u8 *dst, int delim, |
| 826 |
const char **end) |
| 827 |
{ |
| 828 |
const char *s; |
| 829 |
u8 *d; |
| 830 |
u8 dbuf[4]; |
| 831 |
int ret = 0; |
| 832 |
int i; |
| 833 |
int w = 0; |
| 834 |
|
| 835 |
if (srclen < 0) |
| 836 |
srclen = strlen(src); |
| 837 |
s = src; |
| 838 |
d = dbuf; |
| 839 |
i = 0; |
| 840 |
while (1) { |
| 841 |
int c; |
| 842 |
c = xdigit2bin(srclen > 0 ? *s : '\0', delim); |
| 843 |
if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM | |
| 844 |
IN6PTON_COLON_MASK))) |
| 845 |
goto out; |
| 846 |
if (c & (IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 847 |
if (w == 0) |
| 848 |
goto out; |
| 849 |
*d++ = w & 0xff; |
| 850 |
w = 0; |
| 851 |
i++; |
| 852 |
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 853 |
if (i != 4) |
| 854 |
goto out; |
| 855 |
break; |
| 856 |
} |
| 857 |
goto cont; |
| 858 |
} |
| 859 |
w = (w * 10) + c; |
| 860 |
if ((w & 0xffff) > 255) |
| 861 |
goto out; |
| 862 |
cont: |
| 863 |
if (i >= 4) |
| 864 |
goto out; |
| 865 |
s++; |
| 866 |
srclen--; |
| 867 |
} |
| 868 |
ret = 1; |
| 869 |
memcpy(dst, dbuf, sizeof(dbuf)); |
| 870 |
out: |
| 871 |
if (end) |
| 872 |
*end = s; |
| 873 |
return ret; |
| 874 |
} |
| 875 |
|
| 876 |
static int ccs_in6_pton(const char *src, int srclen, u8 *dst, int delim, |
| 877 |
const char **end) |
| 878 |
{ |
| 879 |
const char *s, *tok = NULL; |
| 880 |
u8 *d, *dc = NULL; |
| 881 |
u8 dbuf[16]; |
| 882 |
int ret = 0; |
| 883 |
int i; |
| 884 |
int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL; |
| 885 |
int w = 0; |
| 886 |
|
| 887 |
memset(dbuf, 0, sizeof(dbuf)); |
| 888 |
|
| 889 |
s = src; |
| 890 |
d = dbuf; |
| 891 |
if (srclen < 0) |
| 892 |
srclen = strlen(src); |
| 893 |
|
| 894 |
while (1) { |
| 895 |
int c; |
| 896 |
|
| 897 |
c = xdigit2bin(srclen > 0 ? *s : '\0', delim); |
| 898 |
if (!(c & state)) |
| 899 |
goto out; |
| 900 |
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) { |
| 901 |
/* process one 16-bit word */ |
| 902 |
if (!(state & IN6PTON_NULL)) { |
| 903 |
*d++ = (w >> 8) & 0xff; |
| 904 |
*d++ = w & 0xff; |
| 905 |
} |
| 906 |
w = 0; |
| 907 |
if (c & IN6PTON_DELIM) { |
| 908 |
/* We've processed last word */ |
| 909 |
break; |
| 910 |
} |
| 911 |
/* |
| 912 |
* COLON_1 => XDIGIT |
| 913 |
* COLON_2 => XDIGIT|DELIM |
| 914 |
* COLON_1_2 => COLON_2 |
| 915 |
*/ |
| 916 |
switch (state & IN6PTON_COLON_MASK) { |
| 917 |
case IN6PTON_COLON_2: |
| 918 |
dc = d; |
| 919 |
state = IN6PTON_XDIGIT | IN6PTON_DELIM; |
| 920 |
if (dc - dbuf >= sizeof(dbuf)) |
| 921 |
state |= IN6PTON_NULL; |
| 922 |
break; |
| 923 |
case IN6PTON_COLON_1|IN6PTON_COLON_1_2: |
| 924 |
state = IN6PTON_XDIGIT | IN6PTON_COLON_2; |
| 925 |
break; |
| 926 |
case IN6PTON_COLON_1: |
| 927 |
state = IN6PTON_XDIGIT; |
| 928 |
break; |
| 929 |
case IN6PTON_COLON_1_2: |
| 930 |
state = IN6PTON_COLON_2; |
| 931 |
break; |
| 932 |
default: |
| 933 |
state = 0; |
| 934 |
} |
| 935 |
tok = s + 1; |
| 936 |
goto cont; |
| 937 |
} |
| 938 |
|
| 939 |
if (c & IN6PTON_DOT) { |
| 940 |
ret = ccs_in4_pton(tok ? tok : s, srclen + |
| 941 |
(int)(s - tok), d, delim, &s); |
| 942 |
if (ret > 0) { |
| 943 |
d += 4; |
| 944 |
break; |
| 945 |
} |
| 946 |
goto out; |
| 947 |
} |
| 948 |
|
| 949 |
w = (w << 4) | (0xff & c); |
| 950 |
state = IN6PTON_COLON_1 | IN6PTON_DELIM; |
| 951 |
if (!(w & 0xf000)) |
| 952 |
state |= IN6PTON_XDIGIT; |
| 953 |
if (!dc && d + 2 < dbuf + sizeof(dbuf)) { |
| 954 |
state |= IN6PTON_COLON_1_2; |
| 955 |
state &= ~IN6PTON_DELIM; |
| 956 |
} |
| 957 |
if (d + 2 >= dbuf + sizeof(dbuf)) |
| 958 |
state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2); |
| 959 |
cont: |
| 960 |
if ((dc && d + 4 < dbuf + sizeof(dbuf)) || |
| 961 |
d + 4 == dbuf + sizeof(dbuf)) |
| 962 |
state |= IN6PTON_DOT; |
| 963 |
if (d >= dbuf + sizeof(dbuf)) |
| 964 |
state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK); |
| 965 |
s++; |
| 966 |
srclen--; |
| 967 |
} |
| 968 |
|
| 969 |
i = 15; d--; |
| 970 |
|
| 971 |
if (dc) { |
| 972 |
while (d >= dc) |
| 973 |
dst[i--] = *d--; |
| 974 |
while (i >= dc - dbuf) |
| 975 |
dst[i--] = 0; |
| 976 |
while (i >= 0) |
| 977 |
dst[i--] = *d--; |
| 978 |
} else |
| 979 |
memcpy(dst, dbuf, sizeof(dbuf)); |
| 980 |
|
| 981 |
ret = 1; |
| 982 |
out: |
| 983 |
if (end) |
| 984 |
*end = s; |
| 985 |
return ret; |
| 986 |
} |
| 987 |
#endif |
| 988 |
|
| 989 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32) |
| 990 |
|
| 991 |
/* |
| 992 |
* Routines for printing IPv4 or IPv6 address. |
| 993 |
* These are copied from include/linux/kernel.h include/net/ipv6.h |
| 994 |
* include/net/addrconf.h lib/hexdump.c lib/vsprintf.c and simplified. |
| 995 |
*/ |
| 996 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26) |
| 997 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 || !defined(RHEL_MINOR) || RHEL_MINOR < 9 |
| 998 |
static const char hex_asc[] = "0123456789abcdef"; |
| 999 |
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
| 1000 |
#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] |
| 1001 |
|
| 1002 |
static inline char *pack_hex_byte(char *buf, u8 byte) |
| 1003 |
{ |
| 1004 |
*buf++ = hex_asc_hi(byte); |
| 1005 |
*buf++ = hex_asc_lo(byte); |
| 1006 |
return buf; |
| 1007 |
} |
| 1008 |
#endif |
| 1009 |
#endif |
| 1010 |
|
| 1011 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) |
| 1012 |
static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
| 1013 |
{ |
| 1014 |
return (a->s6_addr32[0] | a->s6_addr32[1] | |
| 1015 |
(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; |
| 1016 |
} |
| 1017 |
#endif |
| 1018 |
|
| 1019 |
static inline int ipv6_addr_is_isatap(const struct in6_addr *addr) |
| 1020 |
{ |
| 1021 |
return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
| 1022 |
} |
| 1023 |
|
| 1024 |
static char *ip4_string(char *p, const u8 *addr) |
| 1025 |
{ |
| 1026 |
/* |
| 1027 |
* Since this function is called outside vsnprintf(), I can use |
| 1028 |
* sprintf() here. |
| 1029 |
*/ |
| 1030 |
return p + |
| 1031 |
sprintf(p, "%u.%u.%u.%u", addr[0], addr[1], addr[2], addr[3]); |
| 1032 |
} |
| 1033 |
|
| 1034 |
static char *ip6_compressed_string(char *p, const char *addr) |
| 1035 |
{ |
| 1036 |
int i, j, range; |
| 1037 |
unsigned char zerolength[8]; |
| 1038 |
int longest = 1; |
| 1039 |
int colonpos = -1; |
| 1040 |
u16 word; |
| 1041 |
u8 hi, lo; |
| 1042 |
bool needcolon = false; |
| 1043 |
bool useIPv4; |
| 1044 |
struct in6_addr in6; |
| 1045 |
|
| 1046 |
memcpy(&in6, addr, sizeof(struct in6_addr)); |
| 1047 |
|
| 1048 |
useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
| 1049 |
|
| 1050 |
memset(zerolength, 0, sizeof(zerolength)); |
| 1051 |
|
| 1052 |
if (useIPv4) |
| 1053 |
range = 6; |
| 1054 |
else |
| 1055 |
range = 8; |
| 1056 |
|
| 1057 |
/* find position of longest 0 run */ |
| 1058 |
for (i = 0; i < range; i++) { |
| 1059 |
for (j = i; j < range; j++) { |
| 1060 |
if (in6.s6_addr16[j] != 0) |
| 1061 |
break; |
| 1062 |
zerolength[i]++; |
| 1063 |
} |
| 1064 |
} |
| 1065 |
for (i = 0; i < range; i++) { |
| 1066 |
if (zerolength[i] > longest) { |
| 1067 |
longest = zerolength[i]; |
| 1068 |
colonpos = i; |
| 1069 |
} |
| 1070 |
} |
| 1071 |
if (longest == 1) /* don't compress a single 0 */ |
| 1072 |
colonpos = -1; |
| 1073 |
|
| 1074 |
/* emit address */ |
| 1075 |
for (i = 0; i < range; i++) { |
| 1076 |
if (i == colonpos) { |
| 1077 |
if (needcolon || i == 0) |
| 1078 |
*p++ = ':'; |
| 1079 |
*p++ = ':'; |
| 1080 |
needcolon = false; |
| 1081 |
i += longest - 1; |
| 1082 |
continue; |
| 1083 |
} |
| 1084 |
if (needcolon) { |
| 1085 |
*p++ = ':'; |
| 1086 |
needcolon = false; |
| 1087 |
} |
| 1088 |
/* hex u16 without leading 0s */ |
| 1089 |
word = ntohs(in6.s6_addr16[i]); |
| 1090 |
hi = word >> 8; |
| 1091 |
lo = word & 0xff; |
| 1092 |
if (hi) { |
| 1093 |
if (hi > 0x0f) |
| 1094 |
p = pack_hex_byte(p, hi); |
| 1095 |
else |
| 1096 |
*p++ = hex_asc_lo(hi); |
| 1097 |
p = pack_hex_byte(p, lo); |
| 1098 |
} else if (lo > 0x0f) |
| 1099 |
p = pack_hex_byte(p, lo); |
| 1100 |
else |
| 1101 |
*p++ = hex_asc_lo(lo); |
| 1102 |
needcolon = true; |
| 1103 |
} |
| 1104 |
|
| 1105 |
if (useIPv4) { |
| 1106 |
if (needcolon) |
| 1107 |
*p++ = ':'; |
| 1108 |
p = ip4_string(p, &in6.s6_addr[12]); |
| 1109 |
} |
| 1110 |
*p = '\0'; |
| 1111 |
|
| 1112 |
return p; |
| 1113 |
} |
| 1114 |
#endif |
| 1115 |
|
| 1116 |
/** |
| 1117 |
* ccs_print_ipv4 - Print an IPv4 address. |
| 1118 |
* |
| 1119 |
* @buffer: Buffer to write to. |
| 1120 |
* @buffer_len: Size of @buffer. |
| 1121 |
* @ip: Pointer to "u32 in network byte order". |
| 1122 |
* |
| 1123 |
* Returns written length. |
| 1124 |
*/ |
| 1125 |
static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len, |
| 1126 |
const u32 *ip) |
| 1127 |
{ |
| 1128 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32) |
| 1129 |
return snprintf(buffer, buffer_len, "%pI4", ip); |
| 1130 |
#else |
| 1131 |
char addr[sizeof("255.255.255.255")]; |
| 1132 |
ip4_string(addr, (const u8 *) ip); |
| 1133 |
return snprintf(buffer, buffer_len, "%s", addr); |
| 1134 |
#endif |
| 1135 |
} |
| 1136 |
|
| 1137 |
/** |
| 1138 |
* ccs_print_ipv6 - Print an IPv6 address. |
| 1139 |
* |
| 1140 |
* @buffer: Buffer to write to. |
| 1141 |
* @buffer_len: Size of @buffer. |
| 1142 |
* @ip: Pointer to "struct in6_addr". |
| 1143 |
* |
| 1144 |
* Returns written length. |
| 1145 |
*/ |
| 1146 |
static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len, |
| 1147 |
const struct in6_addr *ip) |
| 1148 |
{ |
| 1149 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32) |
| 1150 |
return snprintf(buffer, buffer_len, "%pI6c", ip); |
| 1151 |
#else |
| 1152 |
char addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; |
| 1153 |
ip6_compressed_string(addr, (const u8 *) ip); |
| 1154 |
return snprintf(buffer, buffer_len, "%s", addr); |
| 1155 |
#endif |
| 1156 |
} |
| 1157 |
|
| 1158 |
/** |
| 1159 |
* ccs_print_ip - Print an IP address. |
| 1160 |
* |
| 1161 |
* @buf: Buffer to write to. |
| 1162 |
* @size: Size of @buf. |
| 1163 |
* @ptr: Pointer to "struct ipaddr_union". |
| 1164 |
* |
| 1165 |
* Returns nothing. |
| 1166 |
*/ |
| 1167 |
static void ccs_print_ip(char *buf, const unsigned int size, |
| 1168 |
const struct ccs_ipaddr_union *ptr) |
| 1169 |
{ |
| 1170 |
int len; |
| 1171 |
if (ptr->is_ipv6) |
| 1172 |
len = ccs_print_ipv6(buf, size, &ptr->ip[0]); |
| 1173 |
else |
| 1174 |
len = ccs_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0]); |
| 1175 |
if (!memcmp(&ptr->ip[0], &ptr->ip[1], 16) || len >= size / 2) |
| 1176 |
return; |
| 1177 |
buf[len++] = '-'; |
| 1178 |
if (ptr->is_ipv6) |
| 1179 |
ccs_print_ipv6(buf + len, size - len, &ptr->ip[1]); |
| 1180 |
else |
| 1181 |
ccs_print_ipv4(buf + len, size - len, |
| 1182 |
&ptr->ip[1].s6_addr32[0]); |
| 1183 |
} |
| 1184 |
|
| 1185 |
#endif |
| 1186 |
|
| 1187 |
/***** SECTION5: Variables definition section *****/ |
| 1188 |
|
| 1189 |
/* Permit policy management by non-root user? */ |
| 1190 |
static bool ccs_manage_by_non_root; |
| 1191 |
|
| 1192 |
/* Lock for protecting policy. */ |
| 1193 |
DEFINE_MUTEX(ccs_policy_lock); |
| 1194 |
|
| 1195 |
/* Has /sbin/init started? */ |
| 1196 |
bool ccs_policy_loaded; |
| 1197 |
|
| 1198 |
/* List of namespaces. */ |
| 1199 |
LIST_HEAD(ccs_namespace_list); |
| 1200 |
/* True if namespace other than ccs_kernel_namespace is defined. */ |
| 1201 |
static bool ccs_namespace_enabled; |
| 1202 |
|
| 1203 |
/* Initial namespace.*/ |
| 1204 |
static struct ccs_policy_namespace ccs_kernel_namespace; |
| 1205 |
|
| 1206 |
/* List of "struct ccs_condition". */ |
| 1207 |
LIST_HEAD(ccs_condition_list); |
| 1208 |
|
| 1209 |
#ifdef CONFIG_CCSECURITY_PORTRESERVE |
| 1210 |
/* Bitmap for reserved local port numbers.*/ |
| 1211 |
static u8 ccs_reserved_port_map[8192]; |
| 1212 |
#endif |
| 1213 |
|
| 1214 |
/* Wait queue for kernel -> userspace notification. */ |
| 1215 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
| 1216 |
/* Wait queue for userspace -> kernel notification. */ |
| 1217 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_answer_wait); |
| 1218 |
|
| 1219 |
/* The list for "struct ccs_query". */ |
| 1220 |
static LIST_HEAD(ccs_query_list); |
| 1221 |
|
| 1222 |
/* Lock for manipulating ccs_query_list. */ |
| 1223 |
static DEFINE_SPINLOCK(ccs_query_list_lock); |
| 1224 |
|
| 1225 |
/* Number of "struct file" referring /proc/ccs/query interface. */ |
| 1226 |
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
| 1227 |
|
| 1228 |
/* Wait queue for /proc/ccs/audit. */ |
| 1229 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_log_wait); |
| 1230 |
|
| 1231 |
/* The list for "struct ccs_log". */ |
| 1232 |
static LIST_HEAD(ccs_log); |
| 1233 |
|
| 1234 |
/* Lock for "struct list_head ccs_log". */ |
| 1235 |
static DEFINE_SPINLOCK(ccs_log_lock); |
| 1236 |
|
| 1237 |
/* Length of "stuct list_head ccs_log". */ |
| 1238 |
static unsigned int ccs_log_count; |
| 1239 |
|
| 1240 |
/* Timestamp counter for last updated. */ |
| 1241 |
static unsigned int ccs_stat_updated[CCS_MAX_POLICY_STAT]; |
| 1242 |
|
| 1243 |
/* Counter for number of updates. */ |
| 1244 |
static unsigned int ccs_stat_modified[CCS_MAX_POLICY_STAT]; |
| 1245 |
|
| 1246 |
/* Operations for /proc/ccs/self_domain interface. */ |
| 1247 |
static |
| 1248 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17) |
| 1249 |
const |
| 1250 |
#endif |
| 1251 |
struct file_operations ccs_self_operations = { |
| 1252 |
#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION |
| 1253 |
.write = ccs_write_self, |
| 1254 |
#endif |
| 1255 |
.read = ccs_read_self, |
| 1256 |
}; |
| 1257 |
|
| 1258 |
/* Operations for /proc/ccs/ interface. */ |
| 1259 |
static |
| 1260 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17) |
| 1261 |
const |
| 1262 |
#endif |
| 1263 |
struct file_operations ccs_operations = { |
| 1264 |
.open = ccs_open, |
| 1265 |
.release = ccs_release, |
| 1266 |
.poll = ccs_poll, |
| 1267 |
.read = ccs_read, |
| 1268 |
.write = ccs_write, |
| 1269 |
}; |
| 1270 |
|
| 1271 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
| 1272 |
|
| 1273 |
/* The inode operations for /proc/ccs/ directory. */ |
| 1274 |
static struct inode_operations ccs_dir_inode_operations; |
| 1275 |
|
| 1276 |
/* The inode operations for files under /proc/ccs/ directory. */ |
| 1277 |
static struct inode_operations ccs_file_inode_operations; |
| 1278 |
|
| 1279 |
#endif |
| 1280 |
|
| 1281 |
/***** SECTION6: Dependent functions section *****/ |
| 1282 |
|
| 1283 |
/** |
| 1284 |
* list_for_each_cookie - iterate over a list with cookie. |
| 1285 |
* |
| 1286 |
* @pos: Pointer to "struct list_head". |
| 1287 |
* @head: Pointer to "struct list_head". |
| 1288 |
*/ |
| 1289 |
#define list_for_each_cookie(pos, head) \ |
| 1290 |
for (pos = pos ? pos : srcu_dereference((head)->next, &ccs_ss); \ |
| 1291 |
pos != (head); pos = srcu_dereference(pos->next, &ccs_ss)) |
| 1292 |
|
| 1293 |
/** |
| 1294 |
* ccs_read_token - Read a word from a line. |
| 1295 |
* |
| 1296 |
* @param: Pointer to "struct ccs_acl_param". |
| 1297 |
* |
| 1298 |
* Returns a word on success, "" otherwise. |
| 1299 |
* |
| 1300 |
* To allow the caller to skip NULL check, this function returns "" rather than |
| 1301 |
* NULL if there is no more words to read. |
| 1302 |
*/ |
| 1303 |
static char *ccs_read_token(struct ccs_acl_param *param) |
| 1304 |
{ |
| 1305 |
char *pos = param->data; |
| 1306 |
char *del = strchr(pos, ' '); |
| 1307 |
if (del) |
| 1308 |
*del++ = '\0'; |
| 1309 |
else |
| 1310 |
del = pos + strlen(pos); |
| 1311 |
param->data = del; |
| 1312 |
return pos; |
| 1313 |
} |
| 1314 |
|
| 1315 |
/** |
| 1316 |
* ccs_make_byte - Make byte value from three octal characters. |
| 1317 |
* |
| 1318 |
* @c1: The first character. |
| 1319 |
* @c2: The second character. |
| 1320 |
* @c3: The third character. |
| 1321 |
* |
| 1322 |
* Returns byte value. |
| 1323 |
*/ |
| 1324 |
static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3) |
| 1325 |
{ |
| 1326 |
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
| 1327 |
} |
| 1328 |
|
| 1329 |
/** |
| 1330 |
* ccs_correct_word2 - Check whether the given string follows the naming rules. |
| 1331 |
* |
| 1332 |
* @string: The byte sequence to check. Not '\0'-terminated. |
| 1333 |
* @len: Length of @string. |
| 1334 |
* |
| 1335 |
* Returns true if @string follows the naming rules, false otherwise. |
| 1336 |
*/ |
| 1337 |
static bool ccs_correct_word2(const char *string, size_t len) |
| 1338 |
{ |
| 1339 |
const char *const start = string; |
| 1340 |
bool in_repetition = false; |
| 1341 |
unsigned char c; |
| 1342 |
unsigned char d; |
| 1343 |
unsigned char e; |
| 1344 |
if (!len) |
| 1345 |
goto out; |
| 1346 |
while (len--) { |
| 1347 |
c = *string++; |
| 1348 |
if (c == '\\') { |
| 1349 |
if (!len--) |
| 1350 |
goto out; |
| 1351 |
c = *string++; |
| 1352 |
switch (c) { |
| 1353 |
case '\\': /* "\\" */ |
| 1354 |
continue; |
| 1355 |
case '$': /* "\$" */ |
| 1356 |
case '+': /* "\+" */ |
| 1357 |
case '?': /* "\?" */ |
| 1358 |
case '*': /* "\*" */ |
| 1359 |
case '@': /* "\@" */ |
| 1360 |
case 'x': /* "\x" */ |
| 1361 |
case 'X': /* "\X" */ |
| 1362 |
case 'a': /* "\a" */ |
| 1363 |
case 'A': /* "\A" */ |
| 1364 |
case '-': /* "\-" */ |
| 1365 |
continue; |
| 1366 |
case '{': /* "/\{" */ |
| 1367 |
if (string - 3 < start || *(string - 3) != '/') |
| 1368 |
break; |
| 1369 |
in_repetition = true; |
| 1370 |
continue; |
| 1371 |
case '}': /* "\}/" */ |
| 1372 |
if (*string != '/') |
| 1373 |
break; |
| 1374 |
if (!in_repetition) |
| 1375 |
break; |
| 1376 |
in_repetition = false; |
| 1377 |
continue; |
| 1378 |
case '0': /* "\ooo" */ |
| 1379 |
case '1': |
| 1380 |
case '2': |
| 1381 |
case '3': |
| 1382 |
if (!len-- || !len--) |
| 1383 |
break; |
| 1384 |
d = *string++; |
| 1385 |
e = *string++; |
| 1386 |
if (d < '0' || d > '7' || e < '0' || e > '7') |
| 1387 |
break; |
| 1388 |
c = ccs_make_byte(c, d, e); |
| 1389 |
if (c <= ' ' || c >= 127) |
| 1390 |
continue; |
| 1391 |
} |
| 1392 |
goto out; |
| 1393 |
} else if (in_repetition && c == '/') { |
| 1394 |
goto out; |
| 1395 |
} else if (c <= ' ' || c >= 127) { |
| 1396 |
goto out; |
| 1397 |
} |
| 1398 |
} |
| 1399 |
if (in_repetition) |
| 1400 |
goto out; |
| 1401 |
return true; |
| 1402 |
out: |
| 1403 |
return false; |
| 1404 |
} |
| 1405 |
|
| 1406 |
/** |
| 1407 |
* ccs_correct_word - Check whether the given string follows the naming rules. |
| 1408 |
* |
| 1409 |
* @string: The string to check. |
| 1410 |
* |
| 1411 |
* Returns true if @string follows the naming rules, false otherwise. |
| 1412 |
*/ |
| 1413 |
static bool ccs_correct_word(const char *string) |
| 1414 |
{ |
| 1415 |
return ccs_correct_word2(string, strlen(string)); |
| 1416 |
} |
| 1417 |
|
| 1418 |
/** |
| 1419 |
* ccs_get_group - Allocate memory for "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group". |
| 1420 |
* |
| 1421 |
* @param: Pointer to "struct ccs_acl_param". |
| 1422 |
* @idx: Index number. |
| 1423 |
* |
| 1424 |
* Returns pointer to "struct ccs_group" on success, NULL otherwise. |
| 1425 |
*/ |
| 1426 |
static struct ccs_group *ccs_get_group(struct ccs_acl_param *param, |
| 1427 |
const u8 idx) |
| 1428 |
{ |
| 1429 |
struct ccs_group e = { }; |
| 1430 |
struct ccs_group *group = NULL; |
| 1431 |
struct list_head *list; |
| 1432 |
const char *group_name = ccs_read_token(param); |
| 1433 |
bool found = false; |
| 1434 |
if (!ccs_correct_word(group_name) || idx >= CCS_MAX_GROUP) |
| 1435 |
return NULL; |
| 1436 |
e.group_name = ccs_get_name(group_name); |
| 1437 |
if (!e.group_name) |
| 1438 |
return NULL; |
| 1439 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 1440 |
goto out; |
| 1441 |
list = ¶m->ns->group_list[idx]; |
| 1442 |
list_for_each_entry(group, list, head.list) { |
| 1443 |
if (e.group_name != group->group_name || |
| 1444 |
atomic_read(&group->head.users) == CCS_GC_IN_PROGRESS) |
| 1445 |
continue; |
| 1446 |
atomic_inc(&group->head.users); |
| 1447 |
found = true; |
| 1448 |
break; |
| 1449 |
} |
| 1450 |
if (!found) { |
| 1451 |
struct ccs_group *entry = ccs_commit_ok(&e, sizeof(e)); |
| 1452 |
if (entry) { |
| 1453 |
INIT_LIST_HEAD(&entry->member_list); |
| 1454 |
atomic_set(&entry->head.users, 1); |
| 1455 |
list_add_tail_rcu(&entry->head.list, list); |
| 1456 |
group = entry; |
| 1457 |
found = true; |
| 1458 |
} |
| 1459 |
} |
| 1460 |
mutex_unlock(&ccs_policy_lock); |
| 1461 |
out: |
| 1462 |
ccs_put_name(e.group_name); |
| 1463 |
return found ? group : NULL; |
| 1464 |
} |
| 1465 |
|
| 1466 |
/** |
| 1467 |
* ccs_parse_name_union - Parse a ccs_name_union. |
| 1468 |
* |
| 1469 |
* @param: Pointer to "struct ccs_acl_param". |
| 1470 |
* @ptr: Pointer to "struct ccs_name_union". |
| 1471 |
* |
| 1472 |
* Returns true on success, false otherwise. |
| 1473 |
*/ |
| 1474 |
static bool ccs_parse_name_union(struct ccs_acl_param *param, |
| 1475 |
struct ccs_name_union *ptr) |
| 1476 |
{ |
| 1477 |
char *filename; |
| 1478 |
if (param->data[0] == '@') { |
| 1479 |
param->data++; |
| 1480 |
ptr->group = ccs_get_group(param, CCS_PATH_GROUP); |
| 1481 |
return ptr->group != NULL; |
| 1482 |
} |
| 1483 |
filename = ccs_read_token(param); |
| 1484 |
if (!ccs_correct_word(filename)) |
| 1485 |
return false; |
| 1486 |
ptr->filename = ccs_get_name(filename); |
| 1487 |
return ptr->filename != NULL; |
| 1488 |
} |
| 1489 |
|
| 1490 |
/** |
| 1491 |
* ccs_parse_ulong - Parse an "unsigned long" value. |
| 1492 |
* |
| 1493 |
* @result: Pointer to "unsigned long". |
| 1494 |
* @str: Pointer to string to parse. |
| 1495 |
* |
| 1496 |
* Returns one of values in "enum ccs_value_type". |
| 1497 |
* |
| 1498 |
* The @src is updated to point the first character after the value |
| 1499 |
* on success. |
| 1500 |
*/ |
| 1501 |
static u8 ccs_parse_ulong(unsigned long *result, char **str) |
| 1502 |
{ |
| 1503 |
const char *cp = *str; |
| 1504 |
char *ep; |
| 1505 |
int base = 10; |
| 1506 |
if (*cp == '0') { |
| 1507 |
char c = *(cp + 1); |
| 1508 |
if (c == 'x' || c == 'X') { |
| 1509 |
base = 16; |
| 1510 |
cp += 2; |
| 1511 |
} else if (c >= '0' && c <= '7') { |
| 1512 |
base = 8; |
| 1513 |
cp++; |
| 1514 |
} |
| 1515 |
} |
| 1516 |
*result = simple_strtoul(cp, &ep, base); |
| 1517 |
if (cp == ep) |
| 1518 |
return CCS_VALUE_TYPE_INVALID; |
| 1519 |
*str = ep; |
| 1520 |
switch (base) { |
| 1521 |
case 16: |
| 1522 |
return CCS_VALUE_TYPE_HEXADECIMAL; |
| 1523 |
case 8: |
| 1524 |
return CCS_VALUE_TYPE_OCTAL; |
| 1525 |
default: |
| 1526 |
return CCS_VALUE_TYPE_DECIMAL; |
| 1527 |
} |
| 1528 |
} |
| 1529 |
|
| 1530 |
/** |
| 1531 |
* ccs_parse_number_union - Parse a ccs_number_union. |
| 1532 |
* |
| 1533 |
* @param: Pointer to "struct ccs_acl_param". |
| 1534 |
* @ptr: Pointer to "struct ccs_number_union". |
| 1535 |
* |
| 1536 |
* Returns true on success, false otherwise. |
| 1537 |
*/ |
| 1538 |
static bool ccs_parse_number_union(struct ccs_acl_param *param, |
| 1539 |
struct ccs_number_union *ptr) |
| 1540 |
{ |
| 1541 |
char *data; |
| 1542 |
u8 type; |
| 1543 |
unsigned long v; |
| 1544 |
memset(ptr, 0, sizeof(*ptr)); |
| 1545 |
if (param->data[0] == '@') { |
| 1546 |
param->data++; |
| 1547 |
ptr->group = ccs_get_group(param, CCS_NUMBER_GROUP); |
| 1548 |
return ptr->group != NULL; |
| 1549 |
} |
| 1550 |
data = ccs_read_token(param); |
| 1551 |
type = ccs_parse_ulong(&v, &data); |
| 1552 |
if (type == CCS_VALUE_TYPE_INVALID) |
| 1553 |
return false; |
| 1554 |
ptr->values[0] = v; |
| 1555 |
ptr->value_type[0] = type; |
| 1556 |
if (!*data) { |
| 1557 |
ptr->values[1] = v; |
| 1558 |
ptr->value_type[1] = type; |
| 1559 |
return true; |
| 1560 |
} |
| 1561 |
if (*data++ != '-') |
| 1562 |
return false; |
| 1563 |
type = ccs_parse_ulong(&v, &data); |
| 1564 |
if (type == CCS_VALUE_TYPE_INVALID || *data || ptr->values[0] > v) |
| 1565 |
return false; |
| 1566 |
ptr->values[1] = v; |
| 1567 |
ptr->value_type[1] = type; |
| 1568 |
return true; |
| 1569 |
} |
| 1570 |
|
| 1571 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 1572 |
|
| 1573 |
/** |
| 1574 |
* ccs_parse_ipaddr_union - Parse an IP address. |
| 1575 |
* |
| 1576 |
* @param: Pointer to "struct ccs_acl_param". |
| 1577 |
* @ptr: Pointer to "struct ccs_ipaddr_union". |
| 1578 |
* |
| 1579 |
* Returns true on success, false otherwise. |
| 1580 |
*/ |
| 1581 |
static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param, |
| 1582 |
struct ccs_ipaddr_union *ptr) |
| 1583 |
{ |
| 1584 |
u8 * const min = ptr->ip[0].in6_u.u6_addr8; |
| 1585 |
u8 * const max = ptr->ip[1].in6_u.u6_addr8; |
| 1586 |
char *address = ccs_read_token(param); |
| 1587 |
const char *end; |
| 1588 |
if (!strchr(address, ':') && |
| 1589 |
ccs_in4_pton(address, -1, min, '-', &end) > 0) { |
| 1590 |
ptr->is_ipv6 = false; |
| 1591 |
if (!*end) |
| 1592 |
ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0]; |
| 1593 |
else if (*end++ != '-' || |
| 1594 |
ccs_in4_pton(end, -1, max, '\0', &end) <= 0 || *end) |
| 1595 |
return false; |
| 1596 |
return true; |
| 1597 |
} |
| 1598 |
if (ccs_in6_pton(address, -1, min, '-', &end) > 0) { |
| 1599 |
ptr->is_ipv6 = true; |
| 1600 |
if (!*end) |
| 1601 |
memmove(max, min, sizeof(u16) * 8); |
| 1602 |
else if (*end++ != '-' || |
| 1603 |
ccs_in6_pton(end, -1, max, '\0', &end) <= 0 || *end) |
| 1604 |
return false; |
| 1605 |
return true; |
| 1606 |
} |
| 1607 |
return false; |
| 1608 |
} |
| 1609 |
|
| 1610 |
#endif |
| 1611 |
|
| 1612 |
/** |
| 1613 |
* ccs_get_dqword - ccs_get_name() for a quoted string. |
| 1614 |
* |
| 1615 |
* @start: String to save. |
| 1616 |
* |
| 1617 |
* Returns pointer to "struct ccs_path_info" on success, NULL otherwise. |
| 1618 |
*/ |
| 1619 |
static const struct ccs_path_info *ccs_get_dqword(char *start) |
| 1620 |
{ |
| 1621 |
char *cp = start + strlen(start) - 1; |
| 1622 |
if (cp == start || *start++ != '"' || *cp != '"') |
| 1623 |
return NULL; |
| 1624 |
*cp = '\0'; |
| 1625 |
if (*start && !ccs_correct_word(start)) |
| 1626 |
return NULL; |
| 1627 |
return ccs_get_name(start); |
| 1628 |
} |
| 1629 |
|
| 1630 |
/** |
| 1631 |
* ccs_parse_name_union_quoted - Parse a quoted word. |
| 1632 |
* |
| 1633 |
* @param: Pointer to "struct ccs_acl_param". |
| 1634 |
* @ptr: Pointer to "struct ccs_name_union". |
| 1635 |
* |
| 1636 |
* Returns true on success, false otherwise. |
| 1637 |
*/ |
| 1638 |
static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param, |
| 1639 |
struct ccs_name_union *ptr) |
| 1640 |
{ |
| 1641 |
char *filename = param->data; |
| 1642 |
if (*filename == '@') |
| 1643 |
return ccs_parse_name_union(param, ptr); |
| 1644 |
ptr->filename = ccs_get_dqword(filename); |
| 1645 |
return ptr->filename != NULL; |
| 1646 |
} |
| 1647 |
|
| 1648 |
/** |
| 1649 |
* ccs_parse_argv - Parse an argv[] condition part. |
| 1650 |
* |
| 1651 |
* @left: Lefthand value. |
| 1652 |
* @right: Righthand value. |
| 1653 |
* @argv: Pointer to "struct ccs_argv". |
| 1654 |
* |
| 1655 |
* Returns true on success, false otherwise. |
| 1656 |
*/ |
| 1657 |
static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv) |
| 1658 |
{ |
| 1659 |
if (ccs_parse_ulong(&argv->index, &left) != CCS_VALUE_TYPE_DECIMAL || |
| 1660 |
*left++ != ']' || *left) |
| 1661 |
return false; |
| 1662 |
argv->value = ccs_get_dqword(right); |
| 1663 |
return argv->value != NULL; |
| 1664 |
} |
| 1665 |
|
| 1666 |
/** |
| 1667 |
* ccs_parse_envp - Parse an envp[] condition part. |
| 1668 |
* |
| 1669 |
* @left: Lefthand value. |
| 1670 |
* @right: Righthand value. |
| 1671 |
* @envp: Pointer to "struct ccs_envp". |
| 1672 |
* |
| 1673 |
* Returns true on success, false otherwise. |
| 1674 |
*/ |
| 1675 |
static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp) |
| 1676 |
{ |
| 1677 |
const struct ccs_path_info *name; |
| 1678 |
const struct ccs_path_info *value; |
| 1679 |
char *cp = left + strlen(left) - 1; |
| 1680 |
if (*cp-- != ']' || *cp != '"') |
| 1681 |
goto out; |
| 1682 |
*cp = '\0'; |
| 1683 |
if (!ccs_correct_word(left)) |
| 1684 |
goto out; |
| 1685 |
name = ccs_get_name(left); |
| 1686 |
if (!name) |
| 1687 |
goto out; |
| 1688 |
if (!strcmp(right, "NULL")) { |
| 1689 |
value = NULL; |
| 1690 |
} else { |
| 1691 |
value = ccs_get_dqword(right); |
| 1692 |
if (!value) { |
| 1693 |
ccs_put_name(name); |
| 1694 |
goto out; |
| 1695 |
} |
| 1696 |
} |
| 1697 |
envp->name = name; |
| 1698 |
envp->value = value; |
| 1699 |
return true; |
| 1700 |
out: |
| 1701 |
return false; |
| 1702 |
} |
| 1703 |
|
| 1704 |
/** |
| 1705 |
* ccs_same_condition - Check for duplicated "struct ccs_condition" entry. |
| 1706 |
* |
| 1707 |
* @a: Pointer to "struct ccs_condition". |
| 1708 |
* @b: Pointer to "struct ccs_condition". |
| 1709 |
* |
| 1710 |
* Returns true if @a == @b, false otherwise. |
| 1711 |
*/ |
| 1712 |
static bool ccs_same_condition(const struct ccs_condition *a, |
| 1713 |
const struct ccs_condition *b) |
| 1714 |
{ |
| 1715 |
return a->size == b->size && a->condc == b->condc && |
| 1716 |
a->numbers_count == b->numbers_count && |
| 1717 |
a->names_count == b->names_count && |
| 1718 |
a->argc == b->argc && a->envc == b->envc && |
| 1719 |
a->grant_log == b->grant_log && |
| 1720 |
a->exec_transit == b->exec_transit && a->transit == b->transit |
| 1721 |
&& !memcmp(a + 1, b + 1, a->size - sizeof(*a)); |
| 1722 |
} |
| 1723 |
|
| 1724 |
/** |
| 1725 |
* ccs_condition_type - Get condition type. |
| 1726 |
* |
| 1727 |
* @word: Keyword string. |
| 1728 |
* |
| 1729 |
* Returns one of values in "enum ccs_conditions_index" on success, |
| 1730 |
* CCS_MAX_CONDITION_KEYWORD otherwise. |
| 1731 |
*/ |
| 1732 |
static u8 ccs_condition_type(const char *word) |
| 1733 |
{ |
| 1734 |
u8 i; |
| 1735 |
for (i = 0; i < CCS_MAX_CONDITION_KEYWORD; i++) { |
| 1736 |
if (!strcmp(word, ccs_condition_keyword[i])) |
| 1737 |
break; |
| 1738 |
} |
| 1739 |
return i; |
| 1740 |
} |
| 1741 |
|
| 1742 |
/** |
| 1743 |
* ccs_commit_condition - Commit "struct ccs_condition". |
| 1744 |
* |
| 1745 |
* @entry: Pointer to "struct ccs_condition". |
| 1746 |
* |
| 1747 |
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 1748 |
* |
| 1749 |
* This function merges duplicated entries. This function returns NULL if |
| 1750 |
* @entry is not duplicated but memory quota for policy has exceeded. |
| 1751 |
*/ |
| 1752 |
static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry) |
| 1753 |
{ |
| 1754 |
struct ccs_condition *ptr; |
| 1755 |
bool found = false; |
| 1756 |
if (mutex_lock_interruptible(&ccs_policy_lock)) { |
| 1757 |
dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__); |
| 1758 |
ptr = NULL; |
| 1759 |
found = true; |
| 1760 |
goto out; |
| 1761 |
} |
| 1762 |
list_for_each_entry(ptr, &ccs_condition_list, head.list) { |
| 1763 |
if (!ccs_same_condition(ptr, entry) || |
| 1764 |
atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS) |
| 1765 |
continue; |
| 1766 |
/* Same entry found. Share this entry. */ |
| 1767 |
atomic_inc(&ptr->head.users); |
| 1768 |
found = true; |
| 1769 |
break; |
| 1770 |
} |
| 1771 |
if (!found) { |
| 1772 |
if (ccs_memory_ok(entry, entry->size)) { |
| 1773 |
atomic_set(&entry->head.users, 1); |
| 1774 |
list_add(&entry->head.list, &ccs_condition_list); |
| 1775 |
} else { |
| 1776 |
found = true; |
| 1777 |
ptr = NULL; |
| 1778 |
} |
| 1779 |
} |
| 1780 |
mutex_unlock(&ccs_policy_lock); |
| 1781 |
out: |
| 1782 |
if (found) { |
| 1783 |
ccs_del_condition(&entry->head.list); |
| 1784 |
kfree(entry); |
| 1785 |
entry = ptr; |
| 1786 |
} |
| 1787 |
return entry; |
| 1788 |
} |
| 1789 |
|
| 1790 |
/** |
| 1791 |
* ccs_correct_path - Check whether the given pathname follows the naming rules. |
| 1792 |
* |
| 1793 |
* @filename: The pathname to check. |
| 1794 |
* |
| 1795 |
* Returns true if @filename follows the naming rules, false otherwise. |
| 1796 |
*/ |
| 1797 |
static bool ccs_correct_path(const char *filename) |
| 1798 |
{ |
| 1799 |
return *filename == '/' && ccs_correct_word(filename); |
| 1800 |
} |
| 1801 |
|
| 1802 |
/** |
| 1803 |
* ccs_domain_def - Check whether the given token can be a domainname. |
| 1804 |
* |
| 1805 |
* @buffer: The token to check. |
| 1806 |
* |
| 1807 |
* Returns true if @buffer possibly be a domainname, false otherwise. |
| 1808 |
*/ |
| 1809 |
static bool ccs_domain_def(const unsigned char *buffer) |
| 1810 |
{ |
| 1811 |
const unsigned char *cp; |
| 1812 |
int len; |
| 1813 |
if (*buffer != '<') |
| 1814 |
return false; |
| 1815 |
cp = strchr(buffer, ' '); |
| 1816 |
if (!cp) |
| 1817 |
len = strlen(buffer); |
| 1818 |
else |
| 1819 |
len = cp - buffer; |
| 1820 |
if (buffer[len - 1] != '>' || !ccs_correct_word2(buffer + 1, len - 2)) |
| 1821 |
return false; |
| 1822 |
return true; |
| 1823 |
} |
| 1824 |
|
| 1825 |
/** |
| 1826 |
* ccs_correct_domain - Check whether the given domainname follows the naming rules. |
| 1827 |
* |
| 1828 |
* @domainname: The domainname to check. |
| 1829 |
* |
| 1830 |
* Returns true if @domainname follows the naming rules, false otherwise. |
| 1831 |
*/ |
| 1832 |
static bool ccs_correct_domain(const unsigned char *domainname) |
| 1833 |
{ |
| 1834 |
if (!domainname || !ccs_domain_def(domainname)) |
| 1835 |
return false; |
| 1836 |
domainname = strchr(domainname, ' '); |
| 1837 |
if (!domainname++) |
| 1838 |
return true; |
| 1839 |
while (1) { |
| 1840 |
const unsigned char *cp = strchr(domainname, ' '); |
| 1841 |
if (!cp) |
| 1842 |
break; |
| 1843 |
if (*domainname != '/' || |
| 1844 |
!ccs_correct_word2(domainname, cp - domainname)) |
| 1845 |
return false; |
| 1846 |
domainname = cp + 1; |
| 1847 |
} |
| 1848 |
return ccs_correct_path(domainname); |
| 1849 |
} |
| 1850 |
|
| 1851 |
/** |
| 1852 |
* ccs_normalize_line - Format string. |
| 1853 |
* |
| 1854 |
* @buffer: The line to normalize. |
| 1855 |
* |
| 1856 |
* Returns nothing. |
| 1857 |
* |
| 1858 |
* Leading and trailing whitespaces are removed. |
| 1859 |
* Multiple whitespaces are packed into single space. |
| 1860 |
*/ |
| 1861 |
static void ccs_normalize_line(unsigned char *buffer) |
| 1862 |
{ |
| 1863 |
unsigned char *sp = buffer; |
| 1864 |
unsigned char *dp = buffer; |
| 1865 |
bool first = true; |
| 1866 |
while (*sp && (*sp <= ' ' || *sp >= 127)) |
| 1867 |
sp++; |
| 1868 |
while (*sp) { |
| 1869 |
if (!first) |
| 1870 |
*dp++ = ' '; |
| 1871 |
first = false; |
| 1872 |
while (*sp > ' ' && *sp < 127) |
| 1873 |
*dp++ = *sp++; |
| 1874 |
while (*sp && (*sp <= ' ' || *sp >= 127)) |
| 1875 |
sp++; |
| 1876 |
} |
| 1877 |
*dp = '\0'; |
| 1878 |
} |
| 1879 |
|
| 1880 |
/** |
| 1881 |
* ccs_get_domainname - Read a domainname from a line. |
| 1882 |
* |
| 1883 |
* @param: Pointer to "struct ccs_acl_param". |
| 1884 |
* |
| 1885 |
* Returns a domainname on success, NULL otherwise. |
| 1886 |
*/ |
| 1887 |
static const struct ccs_path_info *ccs_get_domainname |
| 1888 |
(struct ccs_acl_param *param) |
| 1889 |
{ |
| 1890 |
char *start = param->data; |
| 1891 |
char *pos = start; |
| 1892 |
while (*pos) { |
| 1893 |
if (*pos++ != ' ' || *pos++ == '/') |
| 1894 |
continue; |
| 1895 |
pos -= 2; |
| 1896 |
*pos++ = '\0'; |
| 1897 |
break; |
| 1898 |
} |
| 1899 |
param->data = pos; |
| 1900 |
if (ccs_correct_domain(start)) |
| 1901 |
return ccs_get_name(start); |
| 1902 |
return NULL; |
| 1903 |
} |
| 1904 |
|
| 1905 |
/** |
| 1906 |
* ccs_get_transit_preference - Parse domain transition preference for execve(). |
| 1907 |
* |
| 1908 |
* @param: Pointer to "struct ccs_acl_param". |
| 1909 |
* @e: Pointer to "struct ccs_condition". |
| 1910 |
* |
| 1911 |
* Returns the condition string part. |
| 1912 |
*/ |
| 1913 |
static char *ccs_get_transit_preference(struct ccs_acl_param *param, |
| 1914 |
struct ccs_condition *e) |
| 1915 |
{ |
| 1916 |
char * const pos = param->data; |
| 1917 |
bool flag; |
| 1918 |
if (*pos == '<') { |
| 1919 |
e->transit = ccs_get_domainname(param); |
| 1920 |
goto done; |
| 1921 |
} |
| 1922 |
{ |
| 1923 |
char *cp = strchr(pos, ' '); |
| 1924 |
if (cp) |
| 1925 |
*cp = '\0'; |
| 1926 |
flag = ccs_correct_path(pos) || !strcmp(pos, "keep") || |
| 1927 |
!strcmp(pos, "initialize") || !strcmp(pos, "reset") || |
| 1928 |
!strcmp(pos, "child") || !strcmp(pos, "parent"); |
| 1929 |
if (cp) |
| 1930 |
*cp = ' '; |
| 1931 |
} |
| 1932 |
if (!flag) |
| 1933 |
return pos; |
| 1934 |
e->transit = ccs_get_name(ccs_read_token(param)); |
| 1935 |
done: |
| 1936 |
if (e->transit) { |
| 1937 |
e->exec_transit = true; |
| 1938 |
return param->data; |
| 1939 |
} |
| 1940 |
/* |
| 1941 |
* Return a bad read-only condition string that will let |
| 1942 |
* ccs_get_condition() return NULL. |
| 1943 |
*/ |
| 1944 |
return "/"; |
| 1945 |
} |
| 1946 |
|
| 1947 |
/** |
| 1948 |
* ccs_get_condition - Parse condition part. |
| 1949 |
* |
| 1950 |
* @param: Pointer to "struct ccs_acl_param". |
| 1951 |
* |
| 1952 |
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 1953 |
*/ |
| 1954 |
struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param) |
| 1955 |
{ |
| 1956 |
struct ccs_condition *entry = NULL; |
| 1957 |
struct ccs_condition_element *condp = NULL; |
| 1958 |
struct ccs_number_union *numbers_p = NULL; |
| 1959 |
struct ccs_name_union *names_p = NULL; |
| 1960 |
struct ccs_argv *argv = NULL; |
| 1961 |
struct ccs_envp *envp = NULL; |
| 1962 |
struct ccs_condition e = { }; |
| 1963 |
char * const start_of_string = ccs_get_transit_preference(param, &e); |
| 1964 |
char * const end_of_string = start_of_string + strlen(start_of_string); |
| 1965 |
char *pos; |
| 1966 |
rerun: |
| 1967 |
pos = start_of_string; |
| 1968 |
while (1) { |
| 1969 |
u8 left = -1; |
| 1970 |
u8 right = -1; |
| 1971 |
char *left_word = pos; |
| 1972 |
char *cp; |
| 1973 |
char *right_word; |
| 1974 |
bool is_not; |
| 1975 |
if (!*left_word) |
| 1976 |
break; |
| 1977 |
/* |
| 1978 |
* Since left-hand condition does not allow use of "path_group" |
| 1979 |
* or "number_group" and environment variable's names do not |
| 1980 |
* accept '=', it is guaranteed that the original line consists |
| 1981 |
* of one or more repetition of $left$operator$right blocks |
| 1982 |
* where "$left is free from '=' and ' '" and "$operator is |
| 1983 |
* either '=' or '!='" and "$right is free from ' '". |
| 1984 |
* Therefore, we can reconstruct the original line at the end |
| 1985 |
* of dry run even if we overwrite $operator with '\0'. |
| 1986 |
*/ |
| 1987 |
cp = strchr(pos, ' '); |
| 1988 |
if (cp) { |
| 1989 |
*cp = '\0'; /* Will restore later. */ |
| 1990 |
pos = cp + 1; |
| 1991 |
} else { |
| 1992 |
pos = ""; |
| 1993 |
} |
| 1994 |
right_word = strchr(left_word, '='); |
| 1995 |
if (!right_word || right_word == left_word) |
| 1996 |
goto out; |
| 1997 |
is_not = *(right_word - 1) == '!'; |
| 1998 |
if (is_not) |
| 1999 |
*(right_word++ - 1) = '\0'; /* Will restore later. */ |
| 2000 |
else if (*(right_word + 1) != '=') |
| 2001 |
*right_word++ = '\0'; /* Will restore later. */ |
| 2002 |
else |
| 2003 |
goto out; |
| 2004 |
dprintk(KERN_WARNING "%u: <%s>%s=<%s>\n", __LINE__, left_word, |
| 2005 |
is_not ? "!" : "", right_word); |
| 2006 |
if (!strcmp(left_word, "grant_log")) { |
| 2007 |
if (entry) { |
| 2008 |
if (is_not || |
| 2009 |
entry->grant_log != CCS_GRANTLOG_AUTO) |
| 2010 |
goto out; |
| 2011 |
else if (!strcmp(right_word, "yes")) |
| 2012 |
entry->grant_log = CCS_GRANTLOG_YES; |
| 2013 |
else if (!strcmp(right_word, "no")) |
| 2014 |
entry->grant_log = CCS_GRANTLOG_NO; |
| 2015 |
else |
| 2016 |
goto out; |
| 2017 |
} |
| 2018 |
continue; |
| 2019 |
} |
| 2020 |
if (!strcmp(left_word, "auto_domain_transition")) { |
| 2021 |
if (entry) { |
| 2022 |
if (is_not || entry->transit) |
| 2023 |
goto out; |
| 2024 |
entry->transit = ccs_get_dqword(right_word); |
| 2025 |
if (!entry->transit || |
| 2026 |
(entry->transit->name[0] != '/' && |
| 2027 |
!ccs_domain_def(entry->transit->name))) |
| 2028 |
goto out; |
| 2029 |
} |
| 2030 |
continue; |
| 2031 |
} |
| 2032 |
if (!strncmp(left_word, "exec.argv[", 10)) { |
| 2033 |
if (!argv) { |
| 2034 |
e.argc++; |
| 2035 |
e.condc++; |
| 2036 |
} else { |
| 2037 |
e.argc--; |
| 2038 |
e.condc--; |
| 2039 |
left = CCS_ARGV_ENTRY; |
| 2040 |
argv->is_not = is_not; |
| 2041 |
if (!ccs_parse_argv(left_word + 10, |
| 2042 |
right_word, argv++)) |
| 2043 |
goto out; |
| 2044 |
} |
| 2045 |
goto store_value; |
| 2046 |
} |
| 2047 |
if (!strncmp(left_word, "exec.envp[\"", 11)) { |
| 2048 |
if (!envp) { |
| 2049 |
e.envc++; |
| 2050 |
e.condc++; |
| 2051 |
} else { |
| 2052 |
e.envc--; |
| 2053 |
e.condc--; |
| 2054 |
left = CCS_ENVP_ENTRY; |
| 2055 |
envp->is_not = is_not; |
| 2056 |
if (!ccs_parse_envp(left_word + 11, |
| 2057 |
right_word, envp++)) |
| 2058 |
goto out; |
| 2059 |
} |
| 2060 |
goto store_value; |
| 2061 |
} |
| 2062 |
left = ccs_condition_type(left_word); |
| 2063 |
dprintk(KERN_WARNING "%u: <%s> left=%u\n", __LINE__, left_word, |
| 2064 |
left); |
| 2065 |
if (left == CCS_MAX_CONDITION_KEYWORD) { |
| 2066 |
if (!numbers_p) { |
| 2067 |
e.numbers_count++; |
| 2068 |
} else { |
| 2069 |
e.numbers_count--; |
| 2070 |
left = CCS_NUMBER_UNION; |
| 2071 |
param->data = left_word; |
| 2072 |
if (*left_word == '@' || |
| 2073 |
!ccs_parse_number_union(param, |
| 2074 |
numbers_p++)) |
| 2075 |
goto out; |
| 2076 |
} |
| 2077 |
} |
| 2078 |
if (!condp) |
| 2079 |
e.condc++; |
| 2080 |
else |
| 2081 |
e.condc--; |
| 2082 |
if (left == CCS_EXEC_REALPATH || left == CCS_SYMLINK_TARGET) { |
| 2083 |
if (!names_p) { |
| 2084 |
e.names_count++; |
| 2085 |
} else { |
| 2086 |
e.names_count--; |
| 2087 |
right = CCS_NAME_UNION; |
| 2088 |
param->data = right_word; |
| 2089 |
if (!ccs_parse_name_union_quoted(param, |
| 2090 |
names_p++)) |
| 2091 |
goto out; |
| 2092 |
} |
| 2093 |
goto store_value; |
| 2094 |
} |
| 2095 |
right = ccs_condition_type(right_word); |
| 2096 |
if (right == CCS_MAX_CONDITION_KEYWORD) { |
| 2097 |
if (!numbers_p) { |
| 2098 |
e.numbers_count++; |
| 2099 |
} else { |
| 2100 |
e.numbers_count--; |
| 2101 |
right = CCS_NUMBER_UNION; |
| 2102 |
param->data = right_word; |
| 2103 |
if (!ccs_parse_number_union(param, |
| 2104 |
numbers_p++)) |
| 2105 |
goto out; |
| 2106 |
} |
| 2107 |
} |
| 2108 |
store_value: |
| 2109 |
if (!condp) { |
| 2110 |
dprintk(KERN_WARNING "%u: dry_run left=%u right=%u " |
| 2111 |
"match=%u\n", __LINE__, left, right, !is_not); |
| 2112 |
continue; |
| 2113 |
} |
| 2114 |
condp->left = left; |
| 2115 |
condp->right = right; |
| 2116 |
condp->equals = !is_not; |
| 2117 |
dprintk(KERN_WARNING "%u: left=%u right=%u match=%u\n", |
| 2118 |
__LINE__, condp->left, condp->right, |
| 2119 |
condp->equals); |
| 2120 |
condp++; |
| 2121 |
} |
| 2122 |
dprintk(KERN_INFO "%u: cond=%u numbers=%u names=%u ac=%u ec=%u\n", |
| 2123 |
__LINE__, e.condc, e.numbers_count, e.names_count, e.argc, |
| 2124 |
e.envc); |
| 2125 |
if (entry) { |
| 2126 |
BUG_ON(e.names_count | e.numbers_count | e.argc | e.envc | |
| 2127 |
e.condc); |
| 2128 |
return ccs_commit_condition(entry); |
| 2129 |
} |
| 2130 |
e.size = sizeof(*entry) |
| 2131 |
+ e.condc * sizeof(struct ccs_condition_element) |
| 2132 |
+ e.numbers_count * sizeof(struct ccs_number_union) |
| 2133 |
+ e.names_count * sizeof(struct ccs_name_union) |
| 2134 |
+ e.argc * sizeof(struct ccs_argv) |
| 2135 |
+ e.envc * sizeof(struct ccs_envp); |
| 2136 |
entry = kzalloc(e.size, CCS_GFP_FLAGS); |
| 2137 |
if (!entry) |
| 2138 |
goto out2; |
| 2139 |
*entry = e; |
| 2140 |
e.transit = NULL; |
| 2141 |
condp = (struct ccs_condition_element *) (entry + 1); |
| 2142 |
numbers_p = (struct ccs_number_union *) (condp + e.condc); |
| 2143 |
names_p = (struct ccs_name_union *) (numbers_p + e.numbers_count); |
| 2144 |
argv = (struct ccs_argv *) (names_p + e.names_count); |
| 2145 |
envp = (struct ccs_envp *) (argv + e.argc); |
| 2146 |
{ |
| 2147 |
bool flag = false; |
| 2148 |
for (pos = start_of_string; pos < end_of_string; pos++) { |
| 2149 |
if (*pos) |
| 2150 |
continue; |
| 2151 |
if (flag) /* Restore " ". */ |
| 2152 |
*pos = ' '; |
| 2153 |
else if (*(pos + 1) == '=') /* Restore "!=". */ |
| 2154 |
*pos = '!'; |
| 2155 |
else /* Restore "=". */ |
| 2156 |
*pos = '='; |
| 2157 |
flag = !flag; |
| 2158 |
} |
| 2159 |
} |
| 2160 |
goto rerun; |
| 2161 |
out: |
| 2162 |
dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__); |
| 2163 |
if (entry) { |
| 2164 |
ccs_del_condition(&entry->head.list); |
| 2165 |
kfree(entry); |
| 2166 |
} |
| 2167 |
out2: |
| 2168 |
ccs_put_name(e.transit); |
| 2169 |
return NULL; |
| 2170 |
} |
| 2171 |
|
| 2172 |
/** |
| 2173 |
* ccs_yesno - Return "yes" or "no". |
| 2174 |
* |
| 2175 |
* @value: Bool value. |
| 2176 |
* |
| 2177 |
* Returns "yes" if @value is not 0, "no" otherwise. |
| 2178 |
*/ |
| 2179 |
static const char *ccs_yesno(const unsigned int value) |
| 2180 |
{ |
| 2181 |
return value ? "yes" : "no"; |
| 2182 |
} |
| 2183 |
|
| 2184 |
/** |
| 2185 |
* ccs_addprintf - strncat()-like-snprintf(). |
| 2186 |
* |
| 2187 |
* @buffer: Buffer to write to. Must be '\0'-terminated. |
| 2188 |
* @len: Size of @buffer. |
| 2189 |
* @fmt: The printf()'s format string, followed by parameters. |
| 2190 |
* |
| 2191 |
* Returns nothing. |
| 2192 |
*/ |
| 2193 |
static void ccs_addprintf(char *buffer, int len, const char *fmt, ...) |
| 2194 |
{ |
| 2195 |
va_list args; |
| 2196 |
const int pos = strlen(buffer); |
| 2197 |
va_start(args, fmt); |
| 2198 |
vsnprintf(buffer + pos, len - pos - 1, fmt, args); |
| 2199 |
va_end(args); |
| 2200 |
} |
| 2201 |
|
| 2202 |
/** |
| 2203 |
* ccs_flush - Flush queued string to userspace's buffer. |
| 2204 |
* |
| 2205 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2206 |
* |
| 2207 |
* Returns true if all data was flushed, false otherwise. |
| 2208 |
*/ |
| 2209 |
static bool ccs_flush(struct ccs_io_buffer *head) |
| 2210 |
{ |
| 2211 |
while (head->r.w_pos) { |
| 2212 |
const char *w = head->r.w[0]; |
| 2213 |
size_t len = strlen(w); |
| 2214 |
if (len) { |
| 2215 |
if (len > head->read_user_buf_avail) |
| 2216 |
len = head->read_user_buf_avail; |
| 2217 |
if (!len) |
| 2218 |
return false; |
| 2219 |
if (copy_to_user(head->read_user_buf, w, len)) |
| 2220 |
return false; |
| 2221 |
head->read_user_buf_avail -= len; |
| 2222 |
head->read_user_buf += len; |
| 2223 |
w += len; |
| 2224 |
} |
| 2225 |
head->r.w[0] = w; |
| 2226 |
if (*w) |
| 2227 |
return false; |
| 2228 |
/* Add '\0' for audit logs and query. */ |
| 2229 |
if (head->type == CCS_AUDIT || head->type == CCS_QUERY) { |
| 2230 |
if (!head->read_user_buf_avail || |
| 2231 |
copy_to_user(head->read_user_buf, "", 1)) |
| 2232 |
return false; |
| 2233 |
head->read_user_buf_avail--; |
| 2234 |
head->read_user_buf++; |
| 2235 |
} |
| 2236 |
head->r.w_pos--; |
| 2237 |
for (len = 0; len < head->r.w_pos; len++) |
| 2238 |
head->r.w[len] = head->r.w[len + 1]; |
| 2239 |
} |
| 2240 |
head->r.avail = 0; |
| 2241 |
return true; |
| 2242 |
} |
| 2243 |
|
| 2244 |
/** |
| 2245 |
* ccs_set_string - Queue string to "struct ccs_io_buffer" structure. |
| 2246 |
* |
| 2247 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2248 |
* @string: String to print. |
| 2249 |
* |
| 2250 |
* Returns nothing. |
| 2251 |
* |
| 2252 |
* Note that @string has to be kept valid until @head is kfree()d. |
| 2253 |
* This means that char[] allocated on stack memory cannot be passed to |
| 2254 |
* this function. Use ccs_io_printf() for char[] allocated on stack memory. |
| 2255 |
*/ |
| 2256 |
static void ccs_set_string(struct ccs_io_buffer *head, const char *string) |
| 2257 |
{ |
| 2258 |
if (head->r.w_pos < CCS_MAX_IO_READ_QUEUE) { |
| 2259 |
head->r.w[head->r.w_pos++] = string; |
| 2260 |
ccs_flush(head); |
| 2261 |
} else |
| 2262 |
printk(KERN_WARNING "Too many words in a line.\n"); |
| 2263 |
} |
| 2264 |
|
| 2265 |
/** |
| 2266 |
* ccs_io_printf - printf() to "struct ccs_io_buffer" structure. |
| 2267 |
* |
| 2268 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2269 |
* @fmt: The printf()'s format string, followed by parameters. |
| 2270 |
* |
| 2271 |
* Returns nothing. |
| 2272 |
*/ |
| 2273 |
static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
| 2274 |
{ |
| 2275 |
va_list args; |
| 2276 |
size_t len; |
| 2277 |
size_t pos = head->r.avail; |
| 2278 |
int size = head->readbuf_size - pos; |
| 2279 |
if (size <= 0) |
| 2280 |
return; |
| 2281 |
va_start(args, fmt); |
| 2282 |
len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
| 2283 |
va_end(args); |
| 2284 |
if (pos + len >= head->readbuf_size) { |
| 2285 |
printk(KERN_WARNING "Too many words in a line.\n"); |
| 2286 |
return; |
| 2287 |
} |
| 2288 |
head->r.avail += len; |
| 2289 |
ccs_set_string(head, head->read_buf + pos); |
| 2290 |
} |
| 2291 |
|
| 2292 |
/** |
| 2293 |
* ccs_set_space - Put a space to "struct ccs_io_buffer" structure. |
| 2294 |
* |
| 2295 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2296 |
* |
| 2297 |
* Returns nothing. |
| 2298 |
*/ |
| 2299 |
static void ccs_set_space(struct ccs_io_buffer *head) |
| 2300 |
{ |
| 2301 |
ccs_set_string(head, " "); |
| 2302 |
} |
| 2303 |
|
| 2304 |
/** |
| 2305 |
* ccs_set_lf - Put a line feed to "struct ccs_io_buffer" structure. |
| 2306 |
* |
| 2307 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2308 |
* |
| 2309 |
* Returns true if all data was flushed, false otherwise. |
| 2310 |
*/ |
| 2311 |
static bool ccs_set_lf(struct ccs_io_buffer *head) |
| 2312 |
{ |
| 2313 |
ccs_set_string(head, "\n"); |
| 2314 |
return !head->r.w_pos; |
| 2315 |
} |
| 2316 |
|
| 2317 |
/** |
| 2318 |
* ccs_set_slash - Put a shash to "struct ccs_io_buffer" structure. |
| 2319 |
* |
| 2320 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2321 |
* |
| 2322 |
* Returns nothing. |
| 2323 |
*/ |
| 2324 |
static void ccs_set_slash(struct ccs_io_buffer *head) |
| 2325 |
{ |
| 2326 |
ccs_set_string(head, "/"); |
| 2327 |
} |
| 2328 |
|
| 2329 |
/** |
| 2330 |
* ccs_init_policy_namespace - Initialize namespace. |
| 2331 |
* |
| 2332 |
* @ns: Pointer to "struct ccs_policy_namespace". |
| 2333 |
* |
| 2334 |
* Returns nothing. |
| 2335 |
*/ |
| 2336 |
static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns) |
| 2337 |
{ |
| 2338 |
unsigned int idx; |
| 2339 |
for (idx = 0; idx < CCS_MAX_ACL_GROUPS; idx++) |
| 2340 |
INIT_LIST_HEAD(&ns->acl_group[idx]); |
| 2341 |
for (idx = 0; idx < CCS_MAX_GROUP; idx++) |
| 2342 |
INIT_LIST_HEAD(&ns->group_list[idx]); |
| 2343 |
for (idx = 0; idx < CCS_MAX_POLICY; idx++) |
| 2344 |
INIT_LIST_HEAD(&ns->policy_list[idx]); |
| 2345 |
ns->profile_version = 20100903; |
| 2346 |
ccs_namespace_enabled = !list_empty(&ccs_namespace_list); |
| 2347 |
list_add_tail_rcu(&ns->namespace_list, &ccs_namespace_list); |
| 2348 |
} |
| 2349 |
|
| 2350 |
/** |
| 2351 |
* ccs_print_namespace - Print namespace header. |
| 2352 |
* |
| 2353 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2354 |
* |
| 2355 |
* Returns nothing. |
| 2356 |
*/ |
| 2357 |
static void ccs_print_namespace(struct ccs_io_buffer *head) |
| 2358 |
{ |
| 2359 |
if (!ccs_namespace_enabled) |
| 2360 |
return; |
| 2361 |
ccs_set_string(head, |
| 2362 |
container_of(head->r.ns, struct ccs_policy_namespace, |
| 2363 |
namespace_list)->name); |
| 2364 |
ccs_set_space(head); |
| 2365 |
} |
| 2366 |
|
| 2367 |
/** |
| 2368 |
* ccs_assign_profile - Create a new profile. |
| 2369 |
* |
| 2370 |
* @ns: Pointer to "struct ccs_policy_namespace". |
| 2371 |
* @profile: Profile number to create. |
| 2372 |
* |
| 2373 |
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
| 2374 |
*/ |
| 2375 |
static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns, |
| 2376 |
const unsigned int profile) |
| 2377 |
{ |
| 2378 |
struct ccs_profile *ptr; |
| 2379 |
struct ccs_profile *entry; |
| 2380 |
if (profile >= CCS_MAX_PROFILES) |
| 2381 |
return NULL; |
| 2382 |
ptr = ns->profile_ptr[profile]; |
| 2383 |
if (ptr) |
| 2384 |
return ptr; |
| 2385 |
entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS); |
| 2386 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 2387 |
goto out; |
| 2388 |
ptr = ns->profile_ptr[profile]; |
| 2389 |
if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
| 2390 |
ptr = entry; |
| 2391 |
ptr->default_config = CCS_CONFIG_DISABLED | |
| 2392 |
CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG; |
| 2393 |
memset(ptr->config, CCS_CONFIG_USE_DEFAULT, |
| 2394 |
sizeof(ptr->config)); |
| 2395 |
ptr->pref[CCS_PREF_MAX_AUDIT_LOG] = |
| 2396 |
CONFIG_CCSECURITY_MAX_AUDIT_LOG; |
| 2397 |
ptr->pref[CCS_PREF_MAX_LEARNING_ENTRY] = |
| 2398 |
CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY; |
| 2399 |
mb(); /* Avoid out-of-order execution. */ |
| 2400 |
ns->profile_ptr[profile] = ptr; |
| 2401 |
entry = NULL; |
| 2402 |
} |
| 2403 |
mutex_unlock(&ccs_policy_lock); |
| 2404 |
out: |
| 2405 |
kfree(entry); |
| 2406 |
return ptr; |
| 2407 |
} |
| 2408 |
|
| 2409 |
/** |
| 2410 |
* ccs_check_profile - Check all profiles currently assigned to domains are defined. |
| 2411 |
* |
| 2412 |
* Returns nothing. |
| 2413 |
*/ |
| 2414 |
static void ccs_check_profile(void) |
| 2415 |
{ |
| 2416 |
struct ccs_domain_info *domain; |
| 2417 |
const int idx = ccs_read_lock(); |
| 2418 |
ccs_policy_loaded = true; |
| 2419 |
printk(KERN_INFO "CCSecurity: 1.8.3+ 2012/05/05\n"); |
| 2420 |
list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) { |
| 2421 |
const u8 profile = domain->profile; |
| 2422 |
const struct ccs_policy_namespace *ns = domain->ns; |
| 2423 |
if (ns->profile_version != 20100903) |
| 2424 |
printk(KERN_ERR |
| 2425 |
"Profile version %u is not supported.\n", |
| 2426 |
ns->profile_version); |
| 2427 |
else if (!ns->profile_ptr[profile]) |
| 2428 |
printk(KERN_ERR |
| 2429 |
"Profile %u (used by '%s') is not defined.\n", |
| 2430 |
profile, domain->domainname->name); |
| 2431 |
else |
| 2432 |
continue; |
| 2433 |
printk(KERN_ERR |
| 2434 |
"Userland tools for TOMOYO 1.8 must be installed and " |
| 2435 |
"policy must be initialized.\n"); |
| 2436 |
printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/1.8/ " |
| 2437 |
"for more information.\n"); |
| 2438 |
panic("STOP!"); |
| 2439 |
} |
| 2440 |
ccs_read_unlock(idx); |
| 2441 |
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
| 2442 |
} |
| 2443 |
|
| 2444 |
/** |
| 2445 |
* ccs_profile - Find a profile. |
| 2446 |
* |
| 2447 |
* @profile: Profile number to find. |
| 2448 |
* |
| 2449 |
* Returns pointer to "struct ccs_profile". |
| 2450 |
*/ |
| 2451 |
static struct ccs_profile *ccs_profile(const u8 profile) |
| 2452 |
{ |
| 2453 |
static struct ccs_profile ccs_null_profile; |
| 2454 |
struct ccs_profile *ptr = ccs_current_namespace()-> |
| 2455 |
profile_ptr[profile]; |
| 2456 |
if (!ptr) |
| 2457 |
ptr = &ccs_null_profile; |
| 2458 |
return ptr; |
| 2459 |
} |
| 2460 |
|
| 2461 |
/** |
| 2462 |
* ccs_get_config - Get config for specified profile's specified functionality. |
| 2463 |
* |
| 2464 |
* @profile: Profile number. |
| 2465 |
* @index: Index number of functionality. |
| 2466 |
* |
| 2467 |
* Returns config. |
| 2468 |
* |
| 2469 |
* First, check for CONFIG::category::functionality. |
| 2470 |
* If CONFIG::category::functionality is set to use default, then check |
| 2471 |
* CONFIG::category. If CONFIG::category is set to use default, then use |
| 2472 |
* CONFIG. CONFIG cannot be set to use default. |
| 2473 |
*/ |
| 2474 |
u8 ccs_get_config(const u8 profile, const u8 index) |
| 2475 |
{ |
| 2476 |
u8 config; |
| 2477 |
const struct ccs_profile *p; |
| 2478 |
if (!ccs_policy_loaded) |
| 2479 |
return CCS_CONFIG_DISABLED; |
| 2480 |
p = ccs_profile(profile); |
| 2481 |
config = p->config[index]; |
| 2482 |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 2483 |
config = p->config[ccs_index2category[index] |
| 2484 |
+ CCS_MAX_MAC_INDEX]; |
| 2485 |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 2486 |
config = p->default_config; |
| 2487 |
return config; |
| 2488 |
} |
| 2489 |
|
| 2490 |
/** |
| 2491 |
* ccs_find_yesno - Find values for specified keyword. |
| 2492 |
* |
| 2493 |
* @string: String to check. |
| 2494 |
* @find: Name of keyword. |
| 2495 |
* |
| 2496 |
* Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. |
| 2497 |
*/ |
| 2498 |
static s8 ccs_find_yesno(const char *string, const char *find) |
| 2499 |
{ |
| 2500 |
const char *cp = strstr(string, find); |
| 2501 |
if (cp) { |
| 2502 |
cp += strlen(find); |
| 2503 |
if (!strncmp(cp, "=yes", 4)) |
| 2504 |
return 1; |
| 2505 |
else if (!strncmp(cp, "=no", 3)) |
| 2506 |
return 0; |
| 2507 |
} |
| 2508 |
return -1; |
| 2509 |
} |
| 2510 |
|
| 2511 |
/** |
| 2512 |
* ccs_set_uint - Set value for specified preference. |
| 2513 |
* |
| 2514 |
* @i: Pointer to "unsigned int". |
| 2515 |
* @string: String to check. |
| 2516 |
* @find: Name of keyword. |
| 2517 |
* |
| 2518 |
* Returns nothing. |
| 2519 |
*/ |
| 2520 |
static void ccs_set_uint(unsigned int *i, const char *string, const char *find) |
| 2521 |
{ |
| 2522 |
const char *cp = strstr(string, find); |
| 2523 |
if (cp) |
| 2524 |
sscanf(cp + strlen(find), "=%u", i); |
| 2525 |
} |
| 2526 |
|
| 2527 |
/** |
| 2528 |
* ccs_str_starts - Check whether the given string starts with the given keyword. |
| 2529 |
* |
| 2530 |
* @src: Pointer to pointer to the string. |
| 2531 |
* @find: Pointer to the keyword. |
| 2532 |
* |
| 2533 |
* Returns true if @src starts with @find, false otherwise. |
| 2534 |
* |
| 2535 |
* The @src is updated to point the first character after the @find |
| 2536 |
* if @src starts with @find. |
| 2537 |
*/ |
| 2538 |
static bool ccs_str_starts(char **src, const char *find) |
| 2539 |
{ |
| 2540 |
const int len = strlen(find); |
| 2541 |
char *tmp = *src; |
| 2542 |
if (strncmp(tmp, find, len)) |
| 2543 |
return false; |
| 2544 |
tmp += len; |
| 2545 |
*src = tmp; |
| 2546 |
return true; |
| 2547 |
} |
| 2548 |
|
| 2549 |
/** |
| 2550 |
* ccs_print_group - Print group's name. |
| 2551 |
* |
| 2552 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2553 |
* @group: Pointer to "struct ccsgroup". Maybe NULL. |
| 2554 |
* |
| 2555 |
* Returns true if @group is not NULL. false otherwise. |
| 2556 |
*/ |
| 2557 |
static bool ccs_print_group(struct ccs_io_buffer *head, |
| 2558 |
const struct ccs_group *group) |
| 2559 |
{ |
| 2560 |
if (group) { |
| 2561 |
ccs_set_string(head, "@"); |
| 2562 |
ccs_set_string(head, group->group_name->name); |
| 2563 |
return true; |
| 2564 |
} |
| 2565 |
return false; |
| 2566 |
} |
| 2567 |
|
| 2568 |
/** |
| 2569 |
* ccs_set_mode - Set mode for specified profile. |
| 2570 |
* |
| 2571 |
* @name: Name of functionality. |
| 2572 |
* @value: Mode for @name. |
| 2573 |
* @profile: Pointer to "struct ccs_profile". |
| 2574 |
* |
| 2575 |
* Returns 0 on success, negative value otherwise. |
| 2576 |
*/ |
| 2577 |
static int ccs_set_mode(char *name, const char *value, |
| 2578 |
struct ccs_profile *profile) |
| 2579 |
{ |
| 2580 |
u8 i; |
| 2581 |
u8 config; |
| 2582 |
if (!strcmp(name, "CONFIG")) { |
| 2583 |
i = CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
| 2584 |
config = profile->default_config; |
| 2585 |
} else if (ccs_str_starts(&name, "CONFIG::")) { |
| 2586 |
config = 0; |
| 2587 |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX; |
| 2588 |
i++) { |
| 2589 |
int len = 0; |
| 2590 |
if (i < CCS_MAX_MAC_INDEX) { |
| 2591 |
const u8 c = ccs_index2category[i]; |
| 2592 |
const char *category = |
| 2593 |
ccs_category_keywords[c]; |
| 2594 |
len = strlen(category); |
| 2595 |
if (strncmp(name, category, len) || |
| 2596 |
name[len++] != ':' || name[len++] != ':') |
| 2597 |
continue; |
| 2598 |
} |
| 2599 |
if (strcmp(name + len, ccs_mac_keywords[i])) |
| 2600 |
continue; |
| 2601 |
config = profile->config[i]; |
| 2602 |
break; |
| 2603 |
} |
| 2604 |
if (i == CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
| 2605 |
return -EINVAL; |
| 2606 |
} else { |
| 2607 |
return -EINVAL; |
| 2608 |
} |
| 2609 |
if (strstr(value, "use_default")) { |
| 2610 |
config = CCS_CONFIG_USE_DEFAULT; |
| 2611 |
} else { |
| 2612 |
u8 mode; |
| 2613 |
for (mode = 0; mode < CCS_CONFIG_MAX_MODE; mode++) |
| 2614 |
if (strstr(value, ccs_mode[mode])) |
| 2615 |
/* |
| 2616 |
* Update lower 3 bits in order to distinguish |
| 2617 |
* 'config' from 'CCS_CONFIG_USE_DEAFULT'. |
| 2618 |
*/ |
| 2619 |
config = (config & ~7) | mode; |
| 2620 |
if (config != CCS_CONFIG_USE_DEFAULT) { |
| 2621 |
switch (ccs_find_yesno(value, "grant_log")) { |
| 2622 |
case 1: |
| 2623 |
config |= CCS_CONFIG_WANT_GRANT_LOG; |
| 2624 |
break; |
| 2625 |
case 0: |
| 2626 |
config &= ~CCS_CONFIG_WANT_GRANT_LOG; |
| 2627 |
break; |
| 2628 |
} |
| 2629 |
switch (ccs_find_yesno(value, "reject_log")) { |
| 2630 |
case 1: |
| 2631 |
config |= CCS_CONFIG_WANT_REJECT_LOG; |
| 2632 |
break; |
| 2633 |
case 0: |
| 2634 |
config &= ~CCS_CONFIG_WANT_REJECT_LOG; |
| 2635 |
break; |
| 2636 |
} |
| 2637 |
} |
| 2638 |
} |
| 2639 |
if (i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX) |
| 2640 |
profile->config[i] = config; |
| 2641 |
else if (config != CCS_CONFIG_USE_DEFAULT) |
| 2642 |
profile->default_config = config; |
| 2643 |
return 0; |
| 2644 |
} |
| 2645 |
|
| 2646 |
/** |
| 2647 |
* ccs_write_profile - Write profile table. |
| 2648 |
* |
| 2649 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2650 |
* |
| 2651 |
* Returns 0 on success, negative value otherwise. |
| 2652 |
*/ |
| 2653 |
static int ccs_write_profile(struct ccs_io_buffer *head) |
| 2654 |
{ |
| 2655 |
char *data = head->write_buf; |
| 2656 |
unsigned int i; |
| 2657 |
char *cp; |
| 2658 |
struct ccs_profile *profile; |
| 2659 |
if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
| 2660 |
== 1) |
| 2661 |
return 0; |
| 2662 |
i = simple_strtoul(data, &cp, 10); |
| 2663 |
if (*cp != '-') |
| 2664 |
return -EINVAL; |
| 2665 |
data = cp + 1; |
| 2666 |
profile = ccs_assign_profile(head->w.ns, i); |
| 2667 |
if (!profile) |
| 2668 |
return -EINVAL; |
| 2669 |
cp = strchr(data, '='); |
| 2670 |
if (!cp) |
| 2671 |
return -EINVAL; |
| 2672 |
*cp++ = '\0'; |
| 2673 |
if (!strcmp(data, "COMMENT")) { |
| 2674 |
static DEFINE_SPINLOCK(lock); |
| 2675 |
const struct ccs_path_info *new_comment = ccs_get_name(cp); |
| 2676 |
const struct ccs_path_info *old_comment; |
| 2677 |
if (!new_comment) |
| 2678 |
return -ENOMEM; |
| 2679 |
spin_lock(&lock); |
| 2680 |
old_comment = profile->comment; |
| 2681 |
profile->comment = new_comment; |
| 2682 |
spin_unlock(&lock); |
| 2683 |
ccs_put_name(old_comment); |
| 2684 |
return 0; |
| 2685 |
} |
| 2686 |
if (!strcmp(data, "PREFERENCE")) { |
| 2687 |
for (i = 0; i < CCS_MAX_PREF; i++) |
| 2688 |
ccs_set_uint(&profile->pref[i], cp, |
| 2689 |
ccs_pref_keywords[i]); |
| 2690 |
return 0; |
| 2691 |
} |
| 2692 |
return ccs_set_mode(data, cp, profile); |
| 2693 |
} |
| 2694 |
|
| 2695 |
/** |
| 2696 |
* ccs_print_config - Print mode for specified functionality. |
| 2697 |
* |
| 2698 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2699 |
* @config: Mode for that functionality. |
| 2700 |
* |
| 2701 |
* Returns nothing. |
| 2702 |
* |
| 2703 |
* Caller prints functionality's name. |
| 2704 |
*/ |
| 2705 |
static void ccs_print_config(struct ccs_io_buffer *head, const u8 config) |
| 2706 |
{ |
| 2707 |
ccs_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
| 2708 |
ccs_mode[config & 3], |
| 2709 |
ccs_yesno(config & CCS_CONFIG_WANT_GRANT_LOG), |
| 2710 |
ccs_yesno(config & CCS_CONFIG_WANT_REJECT_LOG)); |
| 2711 |
} |
| 2712 |
|
| 2713 |
/** |
| 2714 |
* ccs_read_profile - Read profile table. |
| 2715 |
* |
| 2716 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2717 |
* |
| 2718 |
* Returns nothing. |
| 2719 |
*/ |
| 2720 |
static void ccs_read_profile(struct ccs_io_buffer *head) |
| 2721 |
{ |
| 2722 |
u8 index; |
| 2723 |
struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns), |
| 2724 |
namespace_list); |
| 2725 |
const struct ccs_profile *profile; |
| 2726 |
if (head->r.eof) |
| 2727 |
return; |
| 2728 |
next: |
| 2729 |
index = head->r.index; |
| 2730 |
profile = ns->profile_ptr[index]; |
| 2731 |
switch (head->r.step) { |
| 2732 |
case 0: |
| 2733 |
ccs_print_namespace(head); |
| 2734 |
ccs_io_printf(head, "PROFILE_VERSION=%u\n", |
| 2735 |
ns->profile_version); |
| 2736 |
head->r.step++; |
| 2737 |
break; |
| 2738 |
case 1: |
| 2739 |
for ( ; head->r.index < CCS_MAX_PROFILES; head->r.index++) |
| 2740 |
if (ns->profile_ptr[head->r.index]) |
| 2741 |
break; |
| 2742 |
if (head->r.index == CCS_MAX_PROFILES) { |
| 2743 |
head->r.eof = true; |
| 2744 |
return; |
| 2745 |
} |
| 2746 |
head->r.step++; |
| 2747 |
break; |
| 2748 |
case 2: |
| 2749 |
{ |
| 2750 |
u8 i; |
| 2751 |
const struct ccs_path_info *comment = profile->comment; |
| 2752 |
ccs_print_namespace(head); |
| 2753 |
ccs_io_printf(head, "%u-COMMENT=", index); |
| 2754 |
ccs_set_string(head, comment ? comment->name : ""); |
| 2755 |
ccs_set_lf(head); |
| 2756 |
ccs_print_namespace(head); |
| 2757 |
ccs_io_printf(head, "%u-PREFERENCE={ ", index); |
| 2758 |
for (i = 0; i < CCS_MAX_PREF; i++) |
| 2759 |
ccs_io_printf(head, "%s=%u ", |
| 2760 |
ccs_pref_keywords[i], |
| 2761 |
profile->pref[i]); |
| 2762 |
ccs_set_string(head, "}\n"); |
| 2763 |
head->r.step++; |
| 2764 |
} |
| 2765 |
break; |
| 2766 |
case 3: |
| 2767 |
{ |
| 2768 |
ccs_print_namespace(head); |
| 2769 |
ccs_io_printf(head, "%u-%s", index, "CONFIG"); |
| 2770 |
ccs_print_config(head, profile->default_config); |
| 2771 |
head->r.bit = 0; |
| 2772 |
head->r.step++; |
| 2773 |
} |
| 2774 |
break; |
| 2775 |
case 4: |
| 2776 |
for ( ; head->r.bit < CCS_MAX_MAC_INDEX |
| 2777 |
+ CCS_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { |
| 2778 |
const u8 i = head->r.bit; |
| 2779 |
const u8 config = profile->config[i]; |
| 2780 |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 2781 |
continue; |
| 2782 |
ccs_print_namespace(head); |
| 2783 |
if (i < CCS_MAX_MAC_INDEX) |
| 2784 |
ccs_io_printf(head, "%u-CONFIG::%s::%s", index, |
| 2785 |
ccs_category_keywords |
| 2786 |
[ccs_index2category[i]], |
| 2787 |
ccs_mac_keywords[i]); |
| 2788 |
else |
| 2789 |
ccs_io_printf(head, "%u-CONFIG::%s", index, |
| 2790 |
ccs_mac_keywords[i]); |
| 2791 |
ccs_print_config(head, config); |
| 2792 |
head->r.bit++; |
| 2793 |
break; |
| 2794 |
} |
| 2795 |
if (head->r.bit == CCS_MAX_MAC_INDEX |
| 2796 |
+ CCS_MAX_MAC_CATEGORY_INDEX) { |
| 2797 |
head->r.index++; |
| 2798 |
head->r.step = 1; |
| 2799 |
} |
| 2800 |
break; |
| 2801 |
} |
| 2802 |
if (ccs_flush(head)) |
| 2803 |
goto next; |
| 2804 |
} |
| 2805 |
|
| 2806 |
/** |
| 2807 |
* ccs_update_policy - Update an entry for exception policy. |
| 2808 |
* |
| 2809 |
* @size: Size of new entry in bytes. |
| 2810 |
* @param: Pointer to "struct ccs_acl_param". |
| 2811 |
* |
| 2812 |
* Returns 0 on success, negative value otherwise. |
| 2813 |
* |
| 2814 |
* Caller holds ccs_read_lock(). |
| 2815 |
*/ |
| 2816 |
static int ccs_update_policy(const int size, struct ccs_acl_param *param) |
| 2817 |
{ |
| 2818 |
struct ccs_acl_head *new_entry = ¶m->e.acl_head; |
| 2819 |
int error = param->is_delete ? -ENOENT : -ENOMEM; |
| 2820 |
struct ccs_acl_head *entry; |
| 2821 |
struct list_head *list = param->list; |
| 2822 |
BUG_ON(size < sizeof(*entry)); |
| 2823 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 2824 |
return -ENOMEM; |
| 2825 |
list_for_each_entry_srcu(entry, list, list, &ccs_ss) { |
| 2826 |
if (entry->is_deleted == CCS_GC_IN_PROGRESS) |
| 2827 |
continue; |
| 2828 |
if (memcmp(entry + 1, new_entry + 1, size - sizeof(*entry))) |
| 2829 |
continue; |
| 2830 |
entry->is_deleted = param->is_delete; |
| 2831 |
error = 0; |
| 2832 |
break; |
| 2833 |
} |
| 2834 |
if (error && !param->is_delete) { |
| 2835 |
entry = ccs_commit_ok(new_entry, size); |
| 2836 |
if (entry) { |
| 2837 |
list_add_tail_rcu(&entry->list, list); |
| 2838 |
error = 0; |
| 2839 |
} |
| 2840 |
} |
| 2841 |
mutex_unlock(&ccs_policy_lock); |
| 2842 |
return error; |
| 2843 |
} |
| 2844 |
|
| 2845 |
/** |
| 2846 |
* ccs_update_manager_entry - Add a manager entry. |
| 2847 |
* |
| 2848 |
* @manager: The path to manager or the domainnamme. |
| 2849 |
* @is_delete: True if it is a delete request. |
| 2850 |
* |
| 2851 |
* Returns 0 on success, negative value otherwise. |
| 2852 |
*/ |
| 2853 |
static int ccs_update_manager_entry(const char *manager, |
| 2854 |
const bool is_delete) |
| 2855 |
{ |
| 2856 |
struct ccs_acl_param param = { |
| 2857 |
/* .ns = &ccs_kernel_namespace, */ |
| 2858 |
.is_delete = is_delete, |
| 2859 |
.list = &ccs_kernel_namespace.policy_list[CCS_ID_MANAGER], |
| 2860 |
}; |
| 2861 |
struct ccs_manager *e = ¶m.e.manager; |
| 2862 |
int error = is_delete ? -ENOENT : -ENOMEM; |
| 2863 |
/* Forced zero clear for using memcmp() at ccs_update_policy(). */ |
| 2864 |
memset(¶m.e, 0, sizeof(param.e)); |
| 2865 |
if (!ccs_correct_domain(manager) && !ccs_correct_word(manager)) |
| 2866 |
return -EINVAL; |
| 2867 |
e->manager = ccs_get_name(manager); |
| 2868 |
if (e->manager) { |
| 2869 |
error = ccs_update_policy(sizeof(*e), ¶m); |
| 2870 |
ccs_put_name(e->manager); |
| 2871 |
} |
| 2872 |
return error; |
| 2873 |
} |
| 2874 |
|
| 2875 |
/** |
| 2876 |
* ccs_write_manager - Write manager policy. |
| 2877 |
* |
| 2878 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2879 |
* |
| 2880 |
* Returns 0 on success, negative value otherwise. |
| 2881 |
*/ |
| 2882 |
static int ccs_write_manager(struct ccs_io_buffer *head) |
| 2883 |
{ |
| 2884 |
const char *data = head->write_buf; |
| 2885 |
if (!strcmp(data, "manage_by_non_root")) { |
| 2886 |
ccs_manage_by_non_root = !head->w.is_delete; |
| 2887 |
return 0; |
| 2888 |
} |
| 2889 |
return ccs_update_manager_entry(data, head->w.is_delete); |
| 2890 |
} |
| 2891 |
|
| 2892 |
/** |
| 2893 |
* ccs_read_manager - Read manager policy. |
| 2894 |
* |
| 2895 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2896 |
* |
| 2897 |
* Returns nothing. |
| 2898 |
* |
| 2899 |
* Caller holds ccs_read_lock(). |
| 2900 |
*/ |
| 2901 |
static void ccs_read_manager(struct ccs_io_buffer *head) |
| 2902 |
{ |
| 2903 |
if (head->r.eof) |
| 2904 |
return; |
| 2905 |
list_for_each_cookie(head->r.acl, &ccs_kernel_namespace. |
| 2906 |
policy_list[CCS_ID_MANAGER]) { |
| 2907 |
struct ccs_manager *ptr = |
| 2908 |
list_entry(head->r.acl, typeof(*ptr), head.list); |
| 2909 |
if (ptr->head.is_deleted) |
| 2910 |
continue; |
| 2911 |
if (!ccs_flush(head)) |
| 2912 |
return; |
| 2913 |
ccs_set_string(head, ptr->manager->name); |
| 2914 |
ccs_set_lf(head); |
| 2915 |
} |
| 2916 |
head->r.eof = true; |
| 2917 |
} |
| 2918 |
|
| 2919 |
/** |
| 2920 |
* ccs_manager - Check whether the current process is a policy manager. |
| 2921 |
* |
| 2922 |
* Returns true if the current process is permitted to modify policy |
| 2923 |
* via /proc/ccs/ interface. |
| 2924 |
* |
| 2925 |
* Caller holds ccs_read_lock(). |
| 2926 |
*/ |
| 2927 |
static bool ccs_manager(void) |
| 2928 |
{ |
| 2929 |
struct ccs_manager *ptr; |
| 2930 |
struct ccs_path_info exe; |
| 2931 |
struct ccs_security *task = ccs_current_security(); |
| 2932 |
const struct ccs_path_info *domainname |
| 2933 |
= ccs_current_domain()->domainname; |
| 2934 |
bool found = false; |
| 2935 |
if (!ccs_policy_loaded) |
| 2936 |
return true; |
| 2937 |
if (task->ccs_flags & CCS_TASK_IS_MANAGER) |
| 2938 |
return true; |
| 2939 |
if (!ccs_manage_by_non_root && |
| 2940 |
(!uid_eq(current_uid(), GLOBAL_ROOT_UID) || |
| 2941 |
!uid_eq(current_euid(), GLOBAL_ROOT_UID))) |
| 2942 |
return false; |
| 2943 |
exe.name = ccs_get_exe(); |
| 2944 |
if (!exe.name) |
| 2945 |
return false; |
| 2946 |
ccs_fill_path_info(&exe); |
| 2947 |
list_for_each_entry_srcu(ptr, &ccs_kernel_namespace. |
| 2948 |
policy_list[CCS_ID_MANAGER], head.list, |
| 2949 |
&ccs_ss) { |
| 2950 |
if (ptr->head.is_deleted) |
| 2951 |
continue; |
| 2952 |
if (ccs_pathcmp(domainname, ptr->manager) && |
| 2953 |
ccs_pathcmp(&exe, ptr->manager)) |
| 2954 |
continue; |
| 2955 |
/* Set manager flag. */ |
| 2956 |
task->ccs_flags |= CCS_TASK_IS_MANAGER; |
| 2957 |
found = true; |
| 2958 |
break; |
| 2959 |
} |
| 2960 |
if (!found) { /* Reduce error messages. */ |
| 2961 |
static pid_t ccs_last_pid; |
| 2962 |
const pid_t pid = current->pid; |
| 2963 |
if (ccs_last_pid != pid) { |
| 2964 |
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
| 2965 |
"update policies.\n", domainname->name, |
| 2966 |
exe.name); |
| 2967 |
ccs_last_pid = pid; |
| 2968 |
} |
| 2969 |
} |
| 2970 |
kfree(exe.name); |
| 2971 |
return found; |
| 2972 |
} |
| 2973 |
|
| 2974 |
/** |
| 2975 |
* ccs_find_domain - Find a domain by the given name. |
| 2976 |
* |
| 2977 |
* @domainname: The domainname to find. |
| 2978 |
* |
| 2979 |
* Returns pointer to "struct ccs_domain_info" if found, NULL otherwise. |
| 2980 |
* |
| 2981 |
* Caller holds ccs_read_lock(). |
| 2982 |
*/ |
| 2983 |
static struct ccs_domain_info *ccs_find_domain(const char *domainname) |
| 2984 |
{ |
| 2985 |
struct ccs_domain_info *domain; |
| 2986 |
struct ccs_path_info name; |
| 2987 |
name.name = domainname; |
| 2988 |
ccs_fill_path_info(&name); |
| 2989 |
list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) { |
| 2990 |
if (!domain->is_deleted && |
| 2991 |
!ccs_pathcmp(&name, domain->domainname)) |
| 2992 |
return domain; |
| 2993 |
} |
| 2994 |
return NULL; |
| 2995 |
} |
| 2996 |
|
| 2997 |
/** |
| 2998 |
* ccs_select_domain - Parse select command. |
| 2999 |
* |
| 3000 |
* @head: Pointer to "struct ccs_io_buffer". |
| 3001 |
* @data: String to parse. |
| 3002 |
* |
| 3003 |
* Returns true on success, false otherwise. |
| 3004 |
* |
| 3005 |
* Caller holds ccs_read_lock(). |
| 3006 |
*/ |
| 3007 |
static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data) |
| 3008 |
{ |
| 3009 |
unsigned int pid; |
| 3010 |
struct ccs_domain_info *domain = NULL; |
| 3011 |
bool global_pid = false; |
| 3012 |
if (strncmp(data, "select ", 7)) |
| 3013 |
return false; |
| 3014 |
data += 7; |
| 3015 |
if (sscanf(data, "pid=%u", &pid) == 1 || |
| 3016 |
(global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { |
| 3017 |
struct task_struct *p; |
| 3018 |
ccs_tasklist_lock(); |
| 3019 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
| 3020 |
if (global_pid) |
| 3021 |
p = ccsecurity_exports.find_task_by_pid_ns(pid, |
| 3022 |
&init_pid_ns); |
| 3023 |
else |
| 3024 |
p = ccsecurity_exports.find_task_by_vpid(pid); |
| 3025 |
#else |
| 3026 |
p = find_task_by_pid(pid); |
| 3027 |
#endif |
| 3028 |
if (p) |
| 3029 |
domain = ccs_task_domain(p); |
| 3030 |
ccs_tasklist_unlock(); |
| 3031 |
} else if (!strncmp(data, "domain=", 7)) { |
| 3032 |
if (*(data + 7) == '<') |
| 3033 |
domain = ccs_find_domain(data + 7); |
| 3034 |
} else if (sscanf(data, "Q=%u", &pid) == 1) { |
| 3035 |
domain = ccs_find_domain_by_qid(pid); |
| 3036 |
} else |
| 3037 |
return false; |
| 3038 |
head->w.domain = domain; |
| 3039 |
/* Accessing read_buf is safe because head->io_sem is held. */ |
| 3040 |
if (!head->read_buf) |
| 3041 |
return true; /* Do nothing if open(O_WRONLY). */ |
| 3042 |
memset(&head->r, 0, sizeof(head->r)); |
| 3043 |
head->r.print_this_domain_only = true; |
| 3044 |
if (domain) |
| 3045 |
head->r.domain = &domain->list; |
| 3046 |
else |
| 3047 |
head->r.eof = true; |
| 3048 |
ccs_io_printf(head, "# select %s\n", data); |
| 3049 |
if (domain && domain->is_deleted) |
| 3050 |
ccs_set_string(head, "# This is a deleted domain.\n"); |
| 3051 |
return true; |
| 3052 |
} |
| 3053 |
|
| 3054 |
/** |
| 3055 |
* ccs_update_acl - Update "struct ccs_acl_info" entry. |
| 3056 |
* |
| 3057 |
* @size: Size of new entry in bytes. |
| 3058 |
* @param: Pointer to "struct ccs_acl_param". |
| 3059 |
* |
| 3060 |
* Returns 0 on success, negative value otherwise. |
| 3061 |
* |
| 3062 |
* Caller holds ccs_read_lock(). |
| 3063 |
*/ |
| 3064 |
static int ccs_update_acl(const int size, struct ccs_acl_param *param) |
| 3065 |
{ |
| 3066 |
struct ccs_acl_info *new_entry = ¶m->e.acl_info; |
| 3067 |
const bool is_delete = param->is_delete; |
| 3068 |
int error = is_delete ? -ENOENT : -ENOMEM; |
| 3069 |
struct ccs_acl_info *entry; |
| 3070 |
struct list_head * const list = param->list; |
| 3071 |
BUG_ON(size < sizeof(*entry)); |
| 3072 |
if (param->data[0]) { |
| 3073 |
new_entry->cond = ccs_get_condition(param); |
| 3074 |
if (!new_entry->cond) |
| 3075 |
return -EINVAL; |
| 3076 |
/* |
| 3077 |
* Domain transition preference is allowed for only |
| 3078 |
* "file execute"/"task auto_execute_handler"/ |
| 3079 |
* "task denied_auto_execute_handler" entries. |
| 3080 |
*/ |
| 3081 |
if (new_entry->cond->exec_transit && |
| 3082 |
!(new_entry->type == CCS_TYPE_PATH_ACL && |
| 3083 |
new_entry->perm == 1 << CCS_TYPE_EXECUTE) |
| 3084 |
#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER |
| 3085 |
&& new_entry->type != CCS_TYPE_AUTO_EXECUTE_HANDLER && |
| 3086 |
new_entry->type != CCS_TYPE_DENIED_EXECUTE_HANDLER |
| 3087 |
#endif |
| 3088 |
) |
| 3089 |
return -EINVAL; |
| 3090 |
} |
| 3091 |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
| 3092 |
return -ENOMEM; |
| 3093 |
list_for_each_entry_srcu(entry, list, list, &ccs_ss) { |
| 3094 |
if (entry->is_deleted == CCS_GC_IN_PROGRESS) |
| 3095 |
continue; |
| 3096 |
if (entry->type != new_entry->type || |
| 3097 |
entry->cond != new_entry->cond || |
| 3098 |
memcmp(entry + 1, new_entry + 1, size - sizeof(*entry))) |
| 3099 |
continue; |
| 3100 |
if (is_delete) |
| 3101 |
entry->perm &= ~new_entry->perm; |
| 3102 |
else |
| 3103 |
entry->perm |= new_entry->perm; |
| 3104 |
entry->is_deleted = !entry->perm; |
| 3105 |
error = 0; |
| 3106 |
break; |
| 3107 |
} |
| 3108 |
if (error && !is_delete) { |
| 3109 |
entry = ccs_commit_ok(new_entry, size); |
| 3110 |
if (entry) { |
| 3111 |
list_add_tail_rcu(&entry->list, list); |
| 3112 |
error = 0; |
| 3113 |
} |
| 3114 |
} |
| 3115 |
mutex_unlock(&ccs_policy_lock); |
| 3116 |
return error; |
| 3117 |
} |
| 3118 |
|
| 3119 |
/** |
| 3120 |
* ccs_permstr - Find permission keywords. |
| 3121 |
* |
| 3122 |
* @string: String representation for permissions in foo/bar/buz format. |
| 3123 |
* @keyword: Keyword to find from @string/ |
| 3124 |
* |
| 3125 |
* Returns ture if @keyword was found in @string, false otherwise. |
| 3126 |
* |
| 3127 |
* This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2. |
| 3128 |
*/ |
| 3129 |
static bool ccs_permstr(const char *string, const char *keyword) |
| 3130 |
{ |
| 3131 |
const char *cp = strstr(string, keyword); |
| 3132 |
if (cp) |
| 3133 |
return cp == string || *(cp - 1) == '/'; |
| 3134 |
return false; |
| 3135 |
} |
| 3136 |
|
| 3137 |
/** |
| 3138 |
* ccs_write_task - Update task related list. |
| 3139 |
* |
| 3140 |
* @param: Pointer to "struct ccs_acl_param". |
| 3141 |
* |
| 3142 |
* Returns 0 on success, negative value otherwise. |
| 3143 |
* |
| 3144 |
* Caller holds ccs_read_lock(). |
| 3145 |
*/ |
| 3146 |
static int ccs_write_task(struct ccs_acl_param *param) |
| 3147 |
{ |
| 3148 |
int error; |
| 3149 |
const bool is_auto = ccs_str_starts(¶m->data, |
| 3150 |
"auto_domain_transition "); |
| 3151 |
if (!is_auto && !ccs_str_starts(¶m->data, |
| 3152 |
"manual_domain_transition ")) { |
| 3153 |
#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER |
| 3154 |
struct ccs_handler_acl *e = ¶m->e.handler_acl; |
| 3155 |
char *handler; |
| 3156 |
if (ccs_str_starts(¶m->data, "auto_execute_handler ")) |
| 3157 |
e->head.type = CCS_TYPE_AUTO_EXECUTE_HANDLER; |
| 3158 |
else if (ccs_str_starts(¶m->data, |
| 3159 |
"denied_execute_handler ")) |
| 3160 |
e->head.type = CCS_TYPE_DENIED_EXECUTE_HANDLER; |
| 3161 |
else |
| 3162 |
return -EINVAL; |
| 3163 |
handler = ccs_read_token(param); |
| 3164 |
if (!ccs_correct_path(handler)) |
| 3165 |
return -EINVAL; |
| 3166 |
e->handler = ccs_get_name(handler); |
| 3167 |
if (!e->handler) |
| 3168 |
return -ENOMEM; |
| 3169 |
if (e->handler->is_patterned) |
| 3170 |
return -EINVAL; /* No patterns allowed. */ |
| 3171 |
return ccs_update_acl(sizeof(*e), param); |
| 3172 |
#else |
| 3173 |
error = -EINVAL; |
| 3174 |
#endif |
| 3175 |
} else { |
| 3176 |
#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION |
| 3177 |
struct ccs_task_acl *e = ¶m->e.task_acl; |
| 3178 |
e->head.type = is_auto ? |
| 3179 |
CCS_TYPE_AUTO_TASK_ACL : CCS_TYPE_MANUAL_TASK_ACL; |
| 3180 |
e->domainname = ccs_get_domainname(param); |
| 3181 |
if (!e->domainname) |
| 3182 |
return -EINVAL; |
| 3183 |
return ccs_update_acl(sizeof(*e), param); |
| 3184 |
#else |
| 3185 |
error = -EINVAL; |
| 3186 |
#endif |
| 3187 |
} |
| 3188 |
return error; |
| 3189 |
} |
| 3190 |
|
| 3191 |
#ifdef CONFIG_CCSECURITY_NETWORK |
| 3192 |
|
| 3193 |
/** |
| 3194 |
* ccs_write_inet_network - Write "struct ccs_inet_acl" list. |
| 3195 |
* |
| 3196 |
* @param: Pointer to "struct ccs_acl_param". |
| 3197 |
* |
| 3198 |
* Returns 0 on success, negative value otherwise. |
| 3199 |
* |
| 3200 |
* Caller holds ccs_read_lock(). |
| 3201 |
*/ |
| 3202 |
static int ccs_write_inet_network(struct ccs_acl_param *param) |
| 3203 |
{ |
| 3204 |
struct ccs_inet_acl *e = ¶m->e.inet_acl; |
| 3205 |
u8 type; |
| 3206 |
const char *protocol = ccs_read_token(param); |
| 3207 |
const char *operation = ccs_read_token(param); |
| 3208 |
e->head.type = CCS_TYPE_INET_ACL; |
| 3209 |
for (type = 0; type < CCS_SOCK_MAX; type++) |
| 3210 |
if (!strcmp(protocol, ccs_proto_keyword[type])) |
| 3211 |
break; |
| 3212 |
if (type == CCS_SOCK_MAX) |
| 3213 |
return -EINVAL; |
| 3214 |
e->protocol = type; |
| 3215 |
e->head.perm = 0; |
| 3216 |
for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++) |
| 3217 |
if (ccs_permstr(operation, ccs_socket_keyword[type])) |
| 3218 |
e->head.perm |= 1 << type; |
| 3219 |
if (!e->head.perm) |
| 3220 |
return -EINVAL; |
| 3221 |
if (param->data[0] == '@') { |
| 3222 |
param->data++; |
| 3223 |
e->addres
| |
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