1 |
/* |
/* |
2 |
* fs/ccs_common.c |
* security/ccsecurity/util.c |
3 |
* |
* |
4 |
* Common functions for SAKURA and TOMOYO. |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
* |
* |
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* Copyright (C) 2005-2008 NTT DATA CORPORATION |
* Version: 1.7.0-pre 2009/08/08 |
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* |
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* Version: 1.6.5-pre 2008/10/20 |
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7 |
* |
* |
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* This file is applicable to both 2.4.30 and 2.6.11 and later. |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
9 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
10 |
* |
* |
11 |
*/ |
*/ |
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#include <linux/version.h> |
#include "internal.h" |
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
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#define __KERNEL_SYSCALLS__ |
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#endif |
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#include <linux/string.h> |
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#include <linux/mm.h> |
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#include <linux/utime.h> |
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#include <linux/file.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <asm/uaccess.h> |
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#include <stdarg.h> |
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
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#include <linux/namei.h> |
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#include <linux/mount.h> |
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static const int lookup_flags = LOOKUP_FOLLOW; |
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#else |
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static const int lookup_flags = LOOKUP_FOLLOW | LOOKUP_POSITIVE; |
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#endif |
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#include <linux/realpath.h> |
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#include <linux/ccs_common.h> |
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#include <linux/ccs_proc.h> |
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#include <linux/tomoyo.h> |
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
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#include <linux/unistd.h> |
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#endif |
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/* To support PID namespace. */ |
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
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#define find_task_by_pid find_task_by_vpid |
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#endif |
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/* Set default specified by the kernel config. */ |
DEFINE_MUTEX(ccs_policy_lock); |
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#ifdef CONFIG_TOMOYO |
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#define MAX_ACCEPT_ENTRY (CONFIG_TOMOYO_MAX_ACCEPT_ENTRY) |
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#define MAX_GRANT_LOG (CONFIG_TOMOYO_MAX_GRANT_LOG) |
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#define MAX_REJECT_LOG (CONFIG_TOMOYO_MAX_REJECT_LOG) |
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#else |
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#define MAX_ACCEPT_ENTRY 0 |
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#define MAX_GRANT_LOG 0 |
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#define MAX_REJECT_LOG 0 |
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#endif |
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/* Has /sbin/init started? */ |
/* Has /sbin/init started? */ |
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bool sbin_init_started; |
bool ccs_policy_loaded; |
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/* Log level for SAKURA's printk(). */ |
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const char *ccs_log_level = KERN_DEBUG; |
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/* String table for functionality that takes 4 modes. */ |
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static const char *mode_4[4] = { |
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"disabled", "learning", "permissive", "enforcing" |
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}; |
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/* String table for functionality that takes 2 modes. */ |
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static const char *mode_2[4] = { |
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"disabled", "enabled", "enabled", "enabled" |
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}; |
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/* Table for profile. */ |
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static struct { |
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const char *keyword; |
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unsigned int current_value; |
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const unsigned int max_value; |
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} ccs_control_array[CCS_MAX_CONTROL_INDEX] = { |
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[CCS_TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, |
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[CCS_TOMOYO_MAC_FOR_ARGV0] = { "MAC_FOR_ARGV0", 0, 3 }, |
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[CCS_TOMOYO_MAC_FOR_ENV] = { "MAC_FOR_ENV", 0, 3 }, |
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[CCS_TOMOYO_MAC_FOR_NETWORK] = { "MAC_FOR_NETWORK", 0, 3 }, |
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[CCS_TOMOYO_MAC_FOR_SIGNAL] = { "MAC_FOR_SIGNAL", 0, 3 }, |
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[CCS_SAKURA_DENY_CONCEAL_MOUNT] = { "DENY_CONCEAL_MOUNT", 0, 3 }, |
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[CCS_SAKURA_RESTRICT_CHROOT] = { "RESTRICT_CHROOT", 0, 3 }, |
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[CCS_SAKURA_RESTRICT_MOUNT] = { "RESTRICT_MOUNT", 0, 3 }, |
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[CCS_SAKURA_RESTRICT_UNMOUNT] = { "RESTRICT_UNMOUNT", 0, 3 }, |
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[CCS_SAKURA_RESTRICT_PIVOT_ROOT] = { "RESTRICT_PIVOT_ROOT", 0, 3 }, |
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[CCS_SAKURA_RESTRICT_AUTOBIND] = { "RESTRICT_AUTOBIND", 0, 1 }, |
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[CCS_TOMOYO_MAX_ACCEPT_ENTRY] |
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= { "MAX_ACCEPT_ENTRY", MAX_ACCEPT_ENTRY, INT_MAX }, |
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[CCS_TOMOYO_MAX_GRANT_LOG] |
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= { "MAX_GRANT_LOG", MAX_GRANT_LOG, INT_MAX }, |
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[CCS_TOMOYO_MAX_REJECT_LOG] |
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= { "MAX_REJECT_LOG", MAX_REJECT_LOG, INT_MAX }, |
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[CCS_TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, |
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[CCS_SLEEP_PERIOD] |
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= { "SLEEP_PERIOD", 0, 3000 }, /* in 0.1 second */ |
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}; |
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#ifdef CONFIG_TOMOYO |
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20 |
/* Capability name used by domain policy. */ |
/* Capability name used by domain policy. */ |
21 |
static const char *capability_control_keyword[TOMOYO_MAX_CAPABILITY_INDEX] = { |
const char *ccs_capability_list[CCS_MAX_CAPABILITY_INDEX] = { |
22 |
[TOMOYO_INET_STREAM_SOCKET_CREATE] = "inet_tcp_create", |
[CCS_INET_STREAM_SOCKET_CREATE] = "inet_tcp_create", |
23 |
[TOMOYO_INET_STREAM_SOCKET_LISTEN] = "inet_tcp_listen", |
[CCS_INET_STREAM_SOCKET_LISTEN] = "inet_tcp_listen", |
24 |
[TOMOYO_INET_STREAM_SOCKET_CONNECT] = "inet_tcp_connect", |
[CCS_INET_STREAM_SOCKET_CONNECT] = "inet_tcp_connect", |
25 |
[TOMOYO_USE_INET_DGRAM_SOCKET] = "use_inet_udp", |
[CCS_USE_INET_DGRAM_SOCKET] = "use_inet_udp", |
26 |
[TOMOYO_USE_INET_RAW_SOCKET] = "use_inet_ip", |
[CCS_USE_INET_RAW_SOCKET] = "use_inet_ip", |
27 |
[TOMOYO_USE_ROUTE_SOCKET] = "use_route", |
[CCS_USE_ROUTE_SOCKET] = "use_route", |
28 |
[TOMOYO_USE_PACKET_SOCKET] = "use_packet", |
[CCS_USE_PACKET_SOCKET] = "use_packet", |
29 |
[TOMOYO_SYS_MOUNT] = "SYS_MOUNT", |
[CCS_SYS_MOUNT] = "SYS_MOUNT", |
30 |
[TOMOYO_SYS_UMOUNT] = "SYS_UMOUNT", |
[CCS_SYS_UMOUNT] = "SYS_UMOUNT", |
31 |
[TOMOYO_SYS_REBOOT] = "SYS_REBOOT", |
[CCS_SYS_REBOOT] = "SYS_REBOOT", |
32 |
[TOMOYO_SYS_CHROOT] = "SYS_CHROOT", |
[CCS_SYS_CHROOT] = "SYS_CHROOT", |
33 |
[TOMOYO_SYS_KILL] = "SYS_KILL", |
[CCS_SYS_KILL] = "SYS_KILL", |
34 |
[TOMOYO_SYS_VHANGUP] = "SYS_VHANGUP", |
[CCS_SYS_VHANGUP] = "SYS_VHANGUP", |
35 |
[TOMOYO_SYS_SETTIME] = "SYS_TIME", |
[CCS_SYS_SETTIME] = "SYS_TIME", |
36 |
[TOMOYO_SYS_NICE] = "SYS_NICE", |
[CCS_SYS_NICE] = "SYS_NICE", |
37 |
[TOMOYO_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
[CCS_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
38 |
[TOMOYO_USE_KERNEL_MODULE] = "use_kernel_module", |
[CCS_USE_KERNEL_MODULE] = "use_kernel_module", |
39 |
[TOMOYO_CREATE_FIFO] = "create_fifo", |
[CCS_CREATE_FIFO] = "create_fifo", |
40 |
[TOMOYO_CREATE_BLOCK_DEV] = "create_block_dev", |
[CCS_CREATE_BLOCK_DEV] = "create_block_dev", |
41 |
[TOMOYO_CREATE_CHAR_DEV] = "create_char_dev", |
[CCS_CREATE_CHAR_DEV] = "create_char_dev", |
42 |
[TOMOYO_CREATE_UNIX_SOCKET] = "create_unix_socket", |
[CCS_CREATE_UNIX_SOCKET] = "create_unix_socket", |
43 |
[TOMOYO_SYS_LINK] = "SYS_LINK", |
[CCS_SYS_LINK] = "SYS_LINK", |
44 |
[TOMOYO_SYS_SYMLINK] = "SYS_SYMLINK", |
[CCS_SYS_SYMLINK] = "SYS_SYMLINK", |
45 |
[TOMOYO_SYS_RENAME] = "SYS_RENAME", |
[CCS_SYS_RENAME] = "SYS_RENAME", |
46 |
[TOMOYO_SYS_UNLINK] = "SYS_UNLINK", |
[CCS_SYS_UNLINK] = "SYS_UNLINK", |
47 |
[TOMOYO_SYS_CHMOD] = "SYS_CHMOD", |
[CCS_SYS_CHMOD] = "SYS_CHMOD", |
48 |
[TOMOYO_SYS_CHOWN] = "SYS_CHOWN", |
[CCS_SYS_CHOWN] = "SYS_CHOWN", |
49 |
[TOMOYO_SYS_IOCTL] = "SYS_IOCTL", |
[CCS_SYS_IOCTL] = "SYS_IOCTL", |
50 |
[TOMOYO_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
[CCS_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
51 |
[TOMOYO_SYS_PIVOT_ROOT] = "SYS_PIVOT_ROOT", |
[CCS_SYS_PIVOT_ROOT] = "SYS_PIVOT_ROOT", |
52 |
[TOMOYO_SYS_PTRACE] = "SYS_PTRACE", |
[CCS_SYS_PTRACE] = "SYS_PTRACE", |
53 |
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[CCS_CONCEAL_MOUNT] = "conceal_mount", |
54 |
}; |
}; |
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#endif |
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56 |
/* Profile table. Memory is allocated as needed. */ |
/* Profile table. Memory is allocated as needed. */ |
57 |
static struct profile { |
struct ccs_profile *ccs_profile_ptr[CCS_MAX_PROFILES]; |
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unsigned int value[CCS_MAX_CONTROL_INDEX]; |
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const struct path_info *comment; |
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#ifdef CONFIG_TOMOYO |
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unsigned char capability_value[TOMOYO_MAX_CAPABILITY_INDEX]; |
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#endif |
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} *profile_ptr[MAX_PROFILES]; |
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/* Permit policy management by non-root user? */ |
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static bool manage_by_non_root; |
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/* Utility functions. */ |
/* Utility functions. */ |
60 |
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#ifdef CONFIG_TOMOYO |
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61 |
/** |
/** |
62 |
* tomoyo_quiet_setup - Set TOMOYO_VERBOSE=0 by default. |
* ccs_parse_ulong - Parse an "unsigned long" value. |
63 |
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* |
64 |
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* @result: Pointer to "unsigned long". |
65 |
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* @str: Pointer to string to parse. |
66 |
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* |
67 |
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* Returns value type on success, 0 otherwise. |
68 |
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* |
69 |
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* The @src is updated to point the first character after the value |
70 |
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* on success. |
71 |
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*/ |
72 |
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u8 ccs_parse_ulong(unsigned long *result, char **str) |
73 |
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{ |
74 |
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const char *cp = *str; |
75 |
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char *ep; |
76 |
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int base = 10; |
77 |
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if (*cp == '0') { |
78 |
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char c = *(cp + 1); |
79 |
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if (c == 'x' || c == 'X') { |
80 |
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base = 16; |
81 |
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cp += 2; |
82 |
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} else if (c >= '0' && c <= '7') { |
83 |
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base = 8; |
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cp++; |
85 |
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} |
86 |
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} |
87 |
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*result = simple_strtoul(cp, &ep, base); |
88 |
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if (cp == ep) |
89 |
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return 0; |
90 |
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*str = ep; |
91 |
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switch (base) { |
92 |
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case 16: |
93 |
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return CCS_VALUE_TYPE_HEXADECIMAL; |
94 |
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case 8: |
95 |
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return CCS_VALUE_TYPE_OCTAL; |
96 |
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default: |
97 |
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return CCS_VALUE_TYPE_DECIMAL; |
98 |
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} |
99 |
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} |
100 |
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101 |
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/** |
102 |
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* ccs_print_ulong - Print an "unsigned long" value. |
103 |
* |
* |
104 |
* @str: Unused. |
* @buffer: Pointer to buffer. |
105 |
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* @buffer_len: Size of @buffer. |
106 |
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* @value: An "unsigned long" value. |
107 |
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* @type: Type of @value. |
108 |
* |
* |
109 |
* Returns 0. |
* Returns nothing. |
110 |
*/ |
*/ |
111 |
static int __init tomoyo_quiet_setup(char *str) |
void ccs_print_ulong(char *buffer, const int buffer_len, |
112 |
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const unsigned long value, const u8 type) |
113 |
{ |
{ |
114 |
ccs_control_array[CCS_TOMOYO_VERBOSE].current_value = 0; |
if (type == CCS_VALUE_TYPE_DECIMAL) |
115 |
return 0; |
snprintf(buffer, buffer_len, "%lu", value); |
116 |
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else if (type == CCS_VALUE_TYPE_OCTAL) |
117 |
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snprintf(buffer, buffer_len, "0%lo", value); |
118 |
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else if (type == CCS_VALUE_TYPE_HEXADECIMAL) |
119 |
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snprintf(buffer, buffer_len, "0x%lX", value); |
120 |
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else |
121 |
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snprintf(buffer, buffer_len, "type(%u)", type); |
122 |
} |
} |
123 |
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124 |
__setup("TOMOYO_QUIET", tomoyo_quiet_setup); |
bool ccs_parse_name_union(const char *filename, struct ccs_name_union *ptr) |
125 |
#endif |
{ |
126 |
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if (!ccs_is_correct_path(filename, 0, 0, 0)) |
127 |
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return false; |
128 |
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if (filename[0] == '@') { |
129 |
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ptr->group = ccs_get_path_group(filename + 1); |
130 |
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ptr->is_group = true; |
131 |
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return ptr->group != NULL; |
132 |
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} |
133 |
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ptr->filename = ccs_get_name(filename); |
134 |
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ptr->is_group = false; |
135 |
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return ptr->filename != NULL; |
136 |
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} |
137 |
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138 |
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bool ccs_parse_number_union(char *data, struct ccs_number_union *num) |
139 |
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{ |
140 |
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u8 type; |
141 |
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unsigned long v; |
142 |
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memset(num, 0, sizeof(*num)); |
143 |
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if (data[0] == '@') { |
144 |
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if (!ccs_is_correct_path(data, 0, 0, 0)) |
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return false; |
146 |
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num->group = ccs_get_number_group(data + 1); |
147 |
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num->is_group = true; |
148 |
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return num->group != NULL; |
149 |
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} |
150 |
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type = ccs_parse_ulong(&v, &data); |
151 |
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if (!type) |
152 |
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return false; |
153 |
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num->values[0] = v; |
154 |
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num->min_type = type; |
155 |
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if (!*data) { |
156 |
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num->values[1] = v; |
157 |
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num->max_type = type; |
158 |
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return true; |
159 |
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} |
160 |
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if (*data++ != '-') |
161 |
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return false; |
162 |
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type = ccs_parse_ulong(&v, &data); |
163 |
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if (!type || *data) |
164 |
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return false; |
165 |
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num->values[1] = v; |
166 |
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num->max_type = type; |
167 |
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return true; |
168 |
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} |
169 |
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170 |
/** |
/** |
171 |
* is_byte_range - Check whether the string isa \ooo style octal value. |
* ccs_is_byte_range - Check whether the string isa \ooo style octal value. |
172 |
* |
* |
173 |
* @str: Pointer to the string. |
* @str: Pointer to the string. |
174 |
* |
* |
175 |
* Returns true if @str is a \ooo style octal value, false otherwise. |
* Returns true if @str is a \ooo style octal value, false otherwise. |
176 |
*/ |
*/ |
177 |
static bool is_byte_range(const char *str) |
static inline bool ccs_is_byte_range(const char *str) |
178 |
{ |
{ |
179 |
return *str >= '0' && *str++ <= '3' && |
return *str >= '0' && *str++ <= '3' && |
180 |
*str >= '0' && *str++ <= '7' && |
*str >= '0' && *str++ <= '7' && |
182 |
} |
} |
183 |
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184 |
/** |
/** |
185 |
* is_decimal - Check whether the character is a decimal character. |
* ccs_is_decimal - Check whether the character is a decimal character. |
186 |
* |
* |
187 |
* @c: The character to check. |
* @c: The character to check. |
188 |
* |
* |
189 |
* Returns true if @c is a decimal character, false otherwise. |
* Returns true if @c is a decimal character, false otherwise. |
190 |
*/ |
*/ |
191 |
static bool is_decimal(const char c) |
static inline bool ccs_is_decimal(const char c) |
192 |
{ |
{ |
193 |
return c >= '0' && c <= '9'; |
return c >= '0' && c <= '9'; |
194 |
} |
} |
195 |
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196 |
/** |
/** |
197 |
* is_hexadecimal - Check whether the character is a hexadecimal character. |
* ccs_is_hexadecimal - Check whether the character is a hexadecimal character. |
198 |
* |
* |
199 |
* @c: The character to check. |
* @c: The character to check. |
200 |
* |
* |
201 |
* Returns true if @c is a hexadecimal character, false otherwise. |
* Returns true if @c is a hexadecimal character, false otherwise. |
202 |
*/ |
*/ |
203 |
static bool is_hexadecimal(const char c) |
static inline bool ccs_is_hexadecimal(const char c) |
204 |
{ |
{ |
205 |
return (c >= '0' && c <= '9') || |
return (c >= '0' && c <= '9') || |
206 |
(c >= 'A' && c <= 'F') || |
(c >= 'A' && c <= 'F') || |
208 |
} |
} |
209 |
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210 |
/** |
/** |
211 |
* is_alphabet_char - Check whether the character is an alphabet. |
* ccs_is_alphabet_char - Check whether the character is an alphabet. |
212 |
* |
* |
213 |
* @c: The character to check. |
* @c: The character to check. |
214 |
* |
* |
215 |
* Returns true if @c is an alphabet character, false otherwise. |
* Returns true if @c is an alphabet character, false otherwise. |
216 |
*/ |
*/ |
217 |
static bool is_alphabet_char(const char c) |
static inline bool ccs_is_alphabet_char(const char c) |
218 |
{ |
{ |
219 |
return (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'); |
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); |
220 |
} |
} |
221 |
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222 |
/** |
/** |
223 |
* make_byte - Make byte value from three octal characters. |
* ccs_make_byte - Make byte value from three octal characters. |
224 |
* |
* |
225 |
* @c1: The first character. |
* @c1: The first character. |
226 |
* @c2: The second character. |
* @c2: The second character. |
228 |
* |
* |
229 |
* Returns byte value. |
* Returns byte value. |
230 |
*/ |
*/ |
231 |
static u8 make_byte(const u8 c1, const u8 c2, const u8 c3) |
static inline u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3) |
232 |
{ |
{ |
233 |
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
234 |
} |
} |
235 |
|
|
236 |
/** |
/** |
237 |
* str_starts - Check whether the given string starts with the given keyword. |
* ccs_str_starts - Check whether the given string starts with the given keyword. |
238 |
* |
* |
239 |
* @src: Pointer to pointer to the string. |
* @src: Pointer to pointer to the string. |
240 |
* @find: Pointer to the keyword. |
* @find: Pointer to the keyword. |
244 |
* The @src is updated to point the first character after the @find |
* The @src is updated to point the first character after the @find |
245 |
* if @src starts with @find. |
* if @src starts with @find. |
246 |
*/ |
*/ |
247 |
static bool str_starts(char **src, const char *find) |
bool ccs_str_starts(char **src, const char *find) |
248 |
{ |
{ |
249 |
const int len = strlen(find); |
const int len = strlen(find); |
250 |
char *tmp = *src; |
char *tmp = *src; |
256 |
} |
} |
257 |
|
|
258 |
/** |
/** |
259 |
* normalize_line - Format string. |
* ccs_normalize_line - Format string. |
260 |
* |
* |
261 |
* @buffer: The line to normalize. |
* @buffer: The line to normalize. |
262 |
* |
* |
265 |
* |
* |
266 |
* Returns nothing. |
* Returns nothing. |
267 |
*/ |
*/ |
268 |
static void normalize_line(unsigned char *buffer) |
void ccs_normalize_line(unsigned char *buffer) |
269 |
{ |
{ |
270 |
unsigned char *sp = buffer; |
unsigned char *sp = buffer; |
271 |
unsigned char *dp = buffer; |
unsigned char *dp = buffer; |
285 |
} |
} |
286 |
|
|
287 |
/** |
/** |
288 |
|
* ccs_tokenize - Tokenize string. |
289 |
|
* |
290 |
|
* @buffer: The line to tokenize. |
291 |
|
* @w: Pointer to "char *". |
292 |
|
* @size: Sizeof @w . |
293 |
|
* |
294 |
|
* Returns true on success, false otherwise. |
295 |
|
*/ |
296 |
|
bool ccs_tokenize(char *buffer, char *w[], size_t size) |
297 |
|
{ |
298 |
|
int count = size / sizeof(char *); |
299 |
|
int i; |
300 |
|
for (i = 0; i < count; i++) |
301 |
|
w[i] = ""; |
302 |
|
for (i = 0; i < count; i++) { |
303 |
|
char *cp = strchr(buffer, ' '); |
304 |
|
if (cp) |
305 |
|
*cp = '\0'; |
306 |
|
w[i] = buffer; |
307 |
|
if (!cp) |
308 |
|
break; |
309 |
|
buffer = cp + 1; |
310 |
|
} |
311 |
|
return i < count || !*buffer; |
312 |
|
} |
313 |
|
|
314 |
|
/** |
315 |
* ccs_is_correct_path - Validate a pathname. |
* ccs_is_correct_path - Validate a pathname. |
316 |
* @filename: The pathname to check. |
* @filename: The pathname to check. |
317 |
* @start_type: Should the pathname start with '/'? |
* @start_type: Should the pathname start with '/'? |
320 |
* 1 = must / -1 = must not / 0 = don't care |
* 1 = must / -1 = must not / 0 = don't care |
321 |
* @end_type: Should the pathname end with '/'? |
* @end_type: Should the pathname end with '/'? |
322 |
* 1 = must / -1 = must not / 0 = don't care |
* 1 = must / -1 = must not / 0 = don't care |
|
* @function: The name of function calling me. |
|
323 |
* |
* |
324 |
* Check whether the given filename follows the naming rules. |
* Check whether the given filename follows the naming rules. |
325 |
* Returns true if @filename follows the naming rules, false otherwise. |
* Returns true if @filename follows the naming rules, false otherwise. |
326 |
*/ |
*/ |
327 |
bool ccs_is_correct_path(const char *filename, const s8 start_type, |
bool ccs_is_correct_path(const char *filename, const s8 start_type, |
328 |
const s8 pattern_type, const s8 end_type, |
const s8 pattern_type, const s8 end_type) |
|
const char *function) |
|
329 |
{ |
{ |
330 |
bool contains_pattern = false; |
bool contains_pattern = false; |
331 |
unsigned char c; |
unsigned char c; |
343 |
goto out; |
goto out; |
344 |
} |
} |
345 |
if (c) |
if (c) |
346 |
c = *(strchr(filename, '\0') - 1); |
c = *(filename + strlen(filename) - 1); |
347 |
if (end_type == 1) { /* Must end with '/' */ |
if (end_type == 1) { /* Must end with '/' */ |
348 |
if (c != '/') |
if (c != '/') |
349 |
goto out; |
goto out; |
351 |
if (c == '/') |
if (c == '/') |
352 |
goto out; |
goto out; |
353 |
} |
} |
354 |
while ((c = *filename++) != '\0') { |
while (1) { |
355 |
|
c = *filename++; |
356 |
|
if (!c) |
357 |
|
break; |
358 |
if (c == '\\') { |
if (c == '\\') { |
359 |
switch ((c = *filename++)) { |
c = *filename++; |
360 |
|
switch (c) { |
361 |
case '\\': /* "\\" */ |
case '\\': /* "\\" */ |
362 |
continue; |
continue; |
363 |
case '$': /* "\$" */ |
case '$': /* "\$" */ |
384 |
e = *filename++; |
e = *filename++; |
385 |
if (e < '0' || e > '7') |
if (e < '0' || e > '7') |
386 |
break; |
break; |
387 |
c = make_byte(c, d, e); |
c = ccs_make_byte(c, d, e); |
388 |
if (c && (c <= ' ' || c >= 127)) |
if (c && (c <= ' ' || c >= 127)) |
389 |
continue; /* pattern is not \000 */ |
continue; /* pattern is not \000 */ |
390 |
} |
} |
399 |
} |
} |
400 |
return true; |
return true; |
401 |
out: |
out: |
402 |
printk(KERN_DEBUG "%s: Invalid pathname '%s'\n", function, |
printk(KERN_DEBUG "Invalid pathname '%s'\n", original_filename); |
|
original_filename); |
|
403 |
return false; |
return false; |
404 |
} |
} |
405 |
|
|
406 |
/** |
/** |
407 |
* ccs_is_correct_domain - Check whether the given domainname follows the naming rules. |
* ccs_is_correct_domain - Check whether the given domainname follows the naming rules. |
408 |
* @domainname: The domainname to check. |
* @domainname: The domainname to check. |
|
* @function: The name of function calling me. |
|
409 |
* |
* |
410 |
* Returns true if @domainname follows the naming rules, false otherwise. |
* Returns true if @domainname follows the naming rules, false otherwise. |
411 |
*/ |
*/ |
412 |
bool ccs_is_correct_domain(const unsigned char *domainname, |
bool ccs_is_correct_domain(const unsigned char *domainname) |
|
const char *function) |
|
413 |
{ |
{ |
414 |
unsigned char c; |
unsigned char c; |
415 |
unsigned char d; |
unsigned char d; |
425 |
goto out; |
goto out; |
426 |
if (*domainname++ != '/') |
if (*domainname++ != '/') |
427 |
goto out; |
goto out; |
428 |
while ((c = *domainname) != '\0' && c != ' ') { |
while (1) { |
429 |
|
c = *domainname; |
430 |
|
if (!c || c == ' ') |
431 |
|
break; |
432 |
domainname++; |
domainname++; |
433 |
if (c == '\\') { |
if (c == '\\') { |
434 |
c = *domainname++; |
c = *domainname++; |
445 |
e = *domainname++; |
e = *domainname++; |
446 |
if (e < '0' || e > '7') |
if (e < '0' || e > '7') |
447 |
break; |
break; |
448 |
c = make_byte(c, d, e); |
c = ccs_make_byte(c, d, e); |
449 |
if (c && (c <= ' ' || c >= 127)) |
if (c && (c <= ' ' || c >= 127)) |
450 |
/* pattern is not \000 */ |
/* pattern is not \000 */ |
451 |
continue; |
continue; |
458 |
} while (*domainname); |
} while (*domainname); |
459 |
return true; |
return true; |
460 |
out: |
out: |
461 |
printk(KERN_DEBUG "%s: Invalid domainname '%s'\n", function, |
printk(KERN_DEBUG "Invalid domainname '%s'\n", org_domainname); |
|
org_domainname); |
|
462 |
return false; |
return false; |
463 |
} |
} |
464 |
|
|
479 |
* |
* |
480 |
* @domainname: The domainname to find. |
* @domainname: The domainname to find. |
481 |
* |
* |
482 |
* Returns pointer to "struct domain_info" if found, NULL otherwise. |
* Returns pointer to "struct ccs_domain_info" if found, NULL otherwise. |
483 |
|
* |
484 |
|
* Caller holds ccs_read_lock(). |
485 |
*/ |
*/ |
486 |
struct domain_info *ccs_find_domain(const char *domainname) |
struct ccs_domain_info *ccs_find_domain(const char *domainname) |
487 |
{ |
{ |
488 |
struct domain_info *domain; |
struct ccs_domain_info *domain; |
489 |
struct path_info name; |
struct ccs_path_info name; |
490 |
|
ccs_check_read_lock(); |
491 |
name.name = domainname; |
name.name = domainname; |
492 |
ccs_fill_path_info(&name); |
ccs_fill_path_info(&name); |
493 |
list1_for_each_entry(domain, &domain_list, list) { |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
494 |
if (!domain->is_deleted && |
if (!domain->is_deleted && |
495 |
!ccs_pathcmp(&name, domain->domainname)) |
!ccs_pathcmp(&name, domain->domainname)) |
496 |
return domain; |
return domain; |
499 |
} |
} |
500 |
|
|
501 |
/** |
/** |
502 |
* path_depth - Evaluate the number of '/' in a string. |
* ccs_path_depth - Evaluate the number of '/' in a string. |
503 |
* |
* |
504 |
* @pathname: The string to evaluate. |
* @pathname: The string to evaluate. |
505 |
* |
* |
508 |
* I score 2 for each of the '/' in the @pathname |
* I score 2 for each of the '/' in the @pathname |
509 |
* and score 1 if the @pathname ends with '/'. |
* and score 1 if the @pathname ends with '/'. |
510 |
*/ |
*/ |
511 |
static int path_depth(const char *pathname) |
static int ccs_path_depth(const char *pathname) |
512 |
{ |
{ |
513 |
int i = 0; |
int i = 0; |
514 |
if (pathname) { |
if (pathname) { |
515 |
char *ep = strchr(pathname, '\0'); |
const char *ep = pathname + strlen(pathname); |
516 |
if (pathname < ep--) { |
if (pathname < ep--) { |
517 |
if (*ep != '/') |
if (*ep != '/') |
518 |
i++; |
i++; |
525 |
} |
} |
526 |
|
|
527 |
/** |
/** |
528 |
* const_part_length - Evaluate the initial length without a pattern in a token. |
* ccs_const_part_length - Evaluate the initial length without a pattern in a token. |
529 |
* |
* |
530 |
* @filename: The string to evaluate. |
* @filename: The string to evaluate. |
531 |
* |
* |
532 |
* Returns the initial length without a pattern in @filename. |
* Returns the initial length without a pattern in @filename. |
533 |
*/ |
*/ |
534 |
static int const_part_length(const char *filename) |
static int ccs_const_part_length(const char *filename) |
535 |
{ |
{ |
536 |
char c; |
char c; |
537 |
int len = 0; |
int len = 0; |
538 |
if (!filename) |
if (!filename) |
539 |
return 0; |
return 0; |
540 |
while ((c = *filename++) != '\0') { |
while (1) { |
541 |
|
c = *filename++; |
542 |
|
if (!c) |
543 |
|
break; |
544 |
if (c != '\\') { |
if (c != '\\') { |
545 |
len++; |
len++; |
546 |
continue; |
continue; |
569 |
} |
} |
570 |
|
|
571 |
/** |
/** |
572 |
* ccs_fill_path_info - Fill in "struct path_info" members. |
* ccs_fill_path_info - Fill in "struct ccs_path_info" members. |
573 |
* |
* |
574 |
* @ptr: Pointer to "struct path_info" to fill in. |
* @ptr: Pointer to "struct ccs_path_info" to fill in. |
575 |
* |
* |
576 |
* The caller sets "struct path_info"->name. |
* The caller sets "struct ccs_path_info"->name. |
577 |
*/ |
*/ |
578 |
void ccs_fill_path_info(struct path_info *ptr) |
void ccs_fill_path_info(struct ccs_path_info *ptr) |
579 |
{ |
{ |
580 |
const char *name = ptr->name; |
const char *name = ptr->name; |
581 |
const int len = strlen(name); |
const int len = strlen(name); |
582 |
ptr->total_len = len; |
ptr->total_len = len; |
583 |
ptr->const_len = const_part_length(name); |
ptr->const_len = ccs_const_part_length(name); |
584 |
ptr->is_dir = len && (name[len - 1] == '/'); |
ptr->is_dir = len && (name[len - 1] == '/'); |
585 |
ptr->is_patterned = (ptr->const_len < len); |
ptr->is_patterned = (ptr->const_len < len); |
586 |
ptr->hash = full_name_hash(name, len); |
ptr->hash = full_name_hash(name, len); |
587 |
ptr->depth = path_depth(name); |
ptr->depth = ccs_path_depth(name); |
588 |
} |
} |
589 |
|
|
590 |
/** |
/** |
591 |
* file_matches_to_pattern2 - Pattern matching without '/' character |
* ccs_file_matches_pattern2 - Pattern matching without '/' character |
592 |
* and "\-" pattern. |
* and "\-" pattern. |
593 |
* |
* |
594 |
* @filename: The start of string to check. |
* @filename: The start of string to check. |
598 |
* |
* |
599 |
* Returns true if @filename matches @pattern, false otherwise. |
* Returns true if @filename matches @pattern, false otherwise. |
600 |
*/ |
*/ |
601 |
static bool file_matches_to_pattern2(const char *filename, |
static bool ccs_file_matches_pattern2(const char *filename, |
602 |
const char *filename_end, |
const char *filename_end, |
603 |
const char *pattern, |
const char *pattern, |
604 |
const char *pattern_end) |
const char *pattern_end) |
605 |
{ |
{ |
606 |
while (filename < filename_end && pattern < pattern_end) { |
while (filename < filename_end && pattern < pattern_end) { |
607 |
char c; |
char c; |
621 |
} else if (c == '\\') { |
} else if (c == '\\') { |
622 |
if (filename[1] == '\\') |
if (filename[1] == '\\') |
623 |
filename++; |
filename++; |
624 |
else if (is_byte_range(filename + 1)) |
else if (ccs_is_byte_range(filename + 1)) |
625 |
filename += 3; |
filename += 3; |
626 |
else |
else |
627 |
return false; |
return false; |
634 |
return false; |
return false; |
635 |
break; |
break; |
636 |
case '+': |
case '+': |
637 |
if (!is_decimal(c)) |
if (!ccs_is_decimal(c)) |
638 |
return false; |
return false; |
639 |
break; |
break; |
640 |
case 'x': |
case 'x': |
641 |
if (!is_hexadecimal(c)) |
if (!ccs_is_hexadecimal(c)) |
642 |
return false; |
return false; |
643 |
break; |
break; |
644 |
case 'a': |
case 'a': |
645 |
if (!is_alphabet_char(c)) |
if (!ccs_is_alphabet_char(c)) |
646 |
return false; |
return false; |
647 |
break; |
break; |
648 |
case '0': |
case '0': |
649 |
case '1': |
case '1': |
650 |
case '2': |
case '2': |
651 |
case '3': |
case '3': |
652 |
if (c == '\\' && is_byte_range(filename + 1) |
if (c == '\\' && ccs_is_byte_range(filename + 1) |
653 |
&& strncmp(filename + 1, pattern, 3) == 0) { |
&& strncmp(filename + 1, pattern, 3) == 0) { |
654 |
filename += 3; |
filename += 3; |
655 |
pattern += 2; |
pattern += 2; |
659 |
case '*': |
case '*': |
660 |
case '@': |
case '@': |
661 |
for (i = 0; i <= filename_end - filename; i++) { |
for (i = 0; i <= filename_end - filename; i++) { |
662 |
if (file_matches_to_pattern2(filename + i, |
if (ccs_file_matches_pattern2(filename + i, |
663 |
filename_end, |
filename_end, |
664 |
pattern + 1, |
pattern + 1, |
665 |
pattern_end)) |
pattern_end)) |
666 |
return true; |
return true; |
667 |
c = filename[i]; |
c = filename[i]; |
668 |
if (c == '.' && *pattern == '@') |
if (c == '.' && *pattern == '@') |
671 |
continue; |
continue; |
672 |
if (filename[i + 1] == '\\') |
if (filename[i + 1] == '\\') |
673 |
i++; |
i++; |
674 |
else if (is_byte_range(filename + i + 1)) |
else if (ccs_is_byte_range(filename + i + 1)) |
675 |
i += 3; |
i += 3; |
676 |
else |
else |
677 |
break; /* Bad pattern. */ |
break; /* Bad pattern. */ |
681 |
j = 0; |
j = 0; |
682 |
c = *pattern; |
c = *pattern; |
683 |
if (c == '$') { |
if (c == '$') { |
684 |
while (is_decimal(filename[j])) |
while (ccs_is_decimal(filename[j])) |
685 |
j++; |
j++; |
686 |
} else if (c == 'X') { |
} else if (c == 'X') { |
687 |
while (is_hexadecimal(filename[j])) |
while (ccs_is_hexadecimal(filename[j])) |
688 |
j++; |
j++; |
689 |
} else if (c == 'A') { |
} else if (c == 'A') { |
690 |
while (is_alphabet_char(filename[j])) |
while (ccs_is_alphabet_char(filename[j])) |
691 |
j++; |
j++; |
692 |
} |
} |
693 |
for (i = 1; i <= j; i++) { |
for (i = 1; i <= j; i++) { |
694 |
if (file_matches_to_pattern2(filename + i, |
if (ccs_file_matches_pattern2(filename + i, |
695 |
filename_end, |
filename_end, |
696 |
pattern + 1, |
pattern + 1, |
697 |
pattern_end)) |
pattern_end)) |
698 |
return true; |
return true; |
699 |
} |
} |
700 |
return false; /* Not matched or bad pattern. */ |
return false; /* Not matched or bad pattern. */ |
709 |
} |
} |
710 |
|
|
711 |
/** |
/** |
712 |
* file_matches_to_pattern - Pattern matching without without '/' character. |
* ccs_file_matches_pattern - Pattern matching without without '/' character. |
713 |
* |
* |
714 |
* @filename: The start of string to check. |
* @filename: The start of string to check. |
715 |
* @filename_end: The end of string to check. |
* @filename_end: The end of string to check. |
718 |
* |
* |
719 |
* Returns true if @filename matches @pattern, false otherwise. |
* Returns true if @filename matches @pattern, false otherwise. |
720 |
*/ |
*/ |
721 |
static bool file_matches_to_pattern(const char *filename, |
static bool ccs_file_matches_pattern(const char *filename, |
722 |
const char *filename_end, |
const char *filename_end, |
723 |
const char *pattern, |
const char *pattern, |
724 |
const char *pattern_end) |
const char *pattern_end) |
725 |
{ |
{ |
726 |
const char *pattern_start = pattern; |
const char *pattern_start = pattern; |
727 |
bool first = true; |
bool first = true; |
730 |
/* Split at "\-" pattern. */ |
/* Split at "\-" pattern. */ |
731 |
if (*pattern++ != '\\' || *pattern++ != '-') |
if (*pattern++ != '\\' || *pattern++ != '-') |
732 |
continue; |
continue; |
733 |
result = file_matches_to_pattern2(filename, filename_end, |
result = ccs_file_matches_pattern2(filename, filename_end, |
734 |
pattern_start, pattern - 2); |
pattern_start, pattern - 2); |
735 |
if (first) |
if (first) |
736 |
result = !result; |
result = !result; |
737 |
if (result) |
if (result) |
739 |
first = false; |
first = false; |
740 |
pattern_start = pattern; |
pattern_start = pattern; |
741 |
} |
} |
742 |
result = file_matches_to_pattern2(filename, filename_end, |
result = ccs_file_matches_pattern2(filename, filename_end, |
743 |
pattern_start, pattern_end); |
pattern_start, pattern_end); |
744 |
return first ? result : !result; |
return first ? result : !result; |
745 |
} |
} |
746 |
|
|
765 |
* \a 1 alphabet character. |
* \a 1 alphabet character. |
766 |
* \- Subtraction operator. |
* \- Subtraction operator. |
767 |
*/ |
*/ |
768 |
bool ccs_path_matches_pattern(const struct path_info *filename, |
bool ccs_path_matches_pattern(const struct ccs_path_info *filename, |
769 |
const struct path_info *pattern) |
const struct ccs_path_info *pattern) |
770 |
{ |
{ |
771 |
/* |
/* |
772 |
if (!filename || !pattern) |
if (!filename || !pattern) |
778 |
/* If @pattern doesn't contain pattern, I can use strcmp(). */ |
/* If @pattern doesn't contain pattern, I can use strcmp(). */ |
779 |
if (!pattern->is_patterned) |
if (!pattern->is_patterned) |
780 |
return !ccs_pathcmp(filename, pattern); |
return !ccs_pathcmp(filename, pattern); |
781 |
/* Dont compare if the number of '/' differs. */ |
/* Don't compare if the number of '/' differs. */ |
782 |
if (filename->depth != pattern->depth) |
if (filename->depth != pattern->depth) |
783 |
return false; |
return false; |
784 |
/* Compare the initial length without patterns. */ |
/* Compare the initial length without patterns. */ |
791 |
const char *f_delimiter = strchr(f, '/'); |
const char *f_delimiter = strchr(f, '/'); |
792 |
const char *p_delimiter = strchr(p, '/'); |
const char *p_delimiter = strchr(p, '/'); |
793 |
if (!f_delimiter) |
if (!f_delimiter) |
794 |
f_delimiter = strchr(f, '\0'); |
f_delimiter = f + strlen(f); |
795 |
if (!p_delimiter) |
if (!p_delimiter) |
796 |
p_delimiter = strchr(p, '\0'); |
p_delimiter = p + strlen(p); |
797 |
if (!file_matches_to_pattern(f, f_delimiter, p, p_delimiter)) |
if (!ccs_file_matches_pattern(f, f_delimiter, p, p_delimiter)) |
798 |
return false; |
return false; |
799 |
f = f_delimiter; |
f = f_delimiter; |
800 |
if (*f) |
if (*f) |
811 |
} |
} |
812 |
|
|
813 |
/** |
/** |
|
* ccs_io_printf - Transactional printf() to "struct ccs_io_buffer" structure. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
* |
|
|
* The snprintf() will truncate, but ccs_io_printf() won't. |
|
|
*/ |
|
|
bool ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
|
|
{ |
|
|
va_list args; |
|
|
int len; |
|
|
int pos = head->read_avail; |
|
|
int size = head->readbuf_size - pos; |
|
|
if (size <= 0) |
|
|
return false; |
|
|
va_start(args, fmt); |
|
|
len = vsnprintf(head->read_buf + pos, size, fmt, args); |
|
|
va_end(args); |
|
|
if (pos + len >= head->readbuf_size) |
|
|
return false; |
|
|
head->read_avail += len; |
|
|
return true; |
|
|
} |
|
|
|
|
|
/** |
|
814 |
* ccs_get_exe - Get ccs_realpath() of current process. |
* ccs_get_exe - Get ccs_realpath() of current process. |
815 |
* |
* |
816 |
* Returns the ccs_realpath() of current process on success, NULL otherwise. |
* Returns the ccs_realpath() of current process on success, NULL otherwise. |
817 |
* |
* |
818 |
* This function uses ccs_alloc(), so the caller must ccs_free() |
* This function uses kzalloc(), so the caller must kfree() |
819 |
* if this function didn't return NULL. |
* if this function didn't return NULL. |
820 |
*/ |
*/ |
821 |
const char *ccs_get_exe(void) |
const char *ccs_get_exe(void) |
828 |
down_read(&mm->mmap_sem); |
down_read(&mm->mmap_sem); |
829 |
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
830 |
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
831 |
cp = ccs_realpath_from_dentry(vma->vm_file->f_dentry, |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20) |
832 |
vma->vm_file->f_vfsmnt); |
struct path path = { vma->vm_file->f_vfsmnt, |
833 |
|
vma->vm_file->f_dentry }; |
834 |
|
cp = ccs_realpath_from_path(&path); |
835 |
|
#else |
836 |
|
cp = ccs_realpath_from_path(&vma->vm_file->f_path); |
837 |
|
#endif |
838 |
break; |
break; |
839 |
} |
} |
840 |
} |
} |
886 |
/** |
/** |
887 |
* ccs_check_flags - Check mode for specified functionality. |
* ccs_check_flags - Check mode for specified functionality. |
888 |
* |
* |
889 |
* @domain: Pointer to "struct domain_info". NULL for current->domain_info. |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
890 |
* @index: The functionality to check mode. |
* @index: The functionality to check mode. |
891 |
* |
* |
892 |
* Returns the mode of specified functionality. |
* Returns the mode of specified functionality. |
893 |
*/ |
*/ |
894 |
unsigned int ccs_check_flags(const struct domain_info *domain, const u8 index) |
unsigned int ccs_check_flags(const struct ccs_domain_info *domain, |
895 |
|
const u8 index) |
896 |
{ |
{ |
897 |
u8 profile; |
u8 profile; |
898 |
if (!domain) |
if (!domain) |
899 |
domain = current->domain_info; |
domain = ccs_current_domain(); |
900 |
profile = domain->profile; |
profile = domain->profile; |
901 |
return sbin_init_started && index < CCS_MAX_CONTROL_INDEX |
return ccs_policy_loaded && index < CCS_MAX_CONTROL_INDEX |
902 |
#if MAX_PROFILES != 256 |
#if CCS_MAX_PROFILES != 256 |
903 |
&& profile < MAX_PROFILES |
&& profile < CCS_MAX_PROFILES |
904 |
#endif |
#endif |
905 |
&& profile_ptr[profile] ? |
&& ccs_profile_ptr[profile] ? |
906 |
profile_ptr[profile]->value[index] : 0; |
ccs_profile_ptr[profile]->value[index] : 0; |
|
} |
|
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
|
/** |
|
|
* ccs_check_capability_flags - Check mode for specified capability. |
|
|
* |
|
|
* @domain: Pointer to "struct domain_info". NULL for current->domain_info. |
|
|
* @index: The capability to check mode. |
|
|
* |
|
|
* Returns the mode of specified capability. |
|
|
*/ |
|
|
static u8 ccs_check_capability_flags(const struct domain_info *domain, |
|
|
const u8 index) |
|
|
{ |
|
|
const u8 profile = domain ? domain->profile : |
|
|
current->domain_info->profile; |
|
|
return sbin_init_started && index < TOMOYO_MAX_CAPABILITY_INDEX |
|
|
#if MAX_PROFILES != 256 |
|
|
&& profile < MAX_PROFILES |
|
|
#endif |
|
|
&& profile_ptr[profile] ? |
|
|
profile_ptr[profile]->capability_value[index] : 0; |
|
907 |
} |
} |
908 |
|
|
909 |
/** |
/** |
915 |
*/ |
*/ |
916 |
const char *ccs_cap2keyword(const u8 operation) |
const char *ccs_cap2keyword(const u8 operation) |
917 |
{ |
{ |
918 |
return operation < TOMOYO_MAX_CAPABILITY_INDEX |
return operation < CCS_MAX_CAPABILITY_INDEX |
919 |
? capability_control_keyword[operation] : NULL; |
? ccs_capability_list[operation] : NULL; |
920 |
} |
} |
921 |
|
|
|
#endif |
|
|
|
|
922 |
/** |
/** |
923 |
* ccs_init_request_info - Initialize "struct ccs_request_info" members. |
* ccs_init_request_info - Initialize "struct ccs_request_info" members. |
924 |
* |
* |
925 |
* @r: Pointer to "struct ccs_request_info" to initialize. |
* @r: Pointer to "struct ccs_request_info" to initialize. |
926 |
* @domain: Pointer to "struct domain_info". NULL for current->domain_info. |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
927 |
* @index: Index number of functionality. |
* @index: Index number of functionality. |
928 |
|
* |
929 |
|
* Returns mode. |
930 |
*/ |
*/ |
931 |
void ccs_init_request_info(struct ccs_request_info *r, |
int ccs_init_request_info(struct ccs_request_info *r, |
932 |
struct domain_info *domain, const u8 index) |
struct ccs_domain_info *domain, const u8 index) |
933 |
{ |
{ |
934 |
memset(r, 0, sizeof(*r)); |
memset(r, 0, sizeof(*r)); |
935 |
if (!domain) |
if (!domain) |
936 |
domain = current->domain_info; |
domain = ccs_current_domain(); |
937 |
r->domain = domain; |
r->domain = domain; |
938 |
r->profile = domain->profile; |
r->profile = domain->profile; |
939 |
if (index < CCS_MAX_CONTROL_INDEX) |
if (!ccs_policy_loaded || !ccs_profile_ptr[r->profile]) |
940 |
r->mode = ccs_check_flags(domain, index); |
r->mode = 0; |
941 |
#ifdef CONFIG_TOMOYO |
else if (index < CCS_MAX_MAC_INDEX) |
942 |
|
r->mode = ccs_profile_ptr[r->profile]->mac_mode[index]; |
943 |
else |
else |
944 |
r->mode = ccs_check_capability_flags(domain, index |
r->mode = ccs_profile_ptr[r->profile]-> |
945 |
- CCS_MAX_CONTROL_INDEX); |
mac_capability_mode[index - CCS_MAX_MAC_INDEX]; |
946 |
#endif |
return r->mode; |
|
r->tomoyo_flags = current->tomoyo_flags; |
|
947 |
} |
} |
948 |
|
|
949 |
/** |
/** |
950 |
* ccs_verbose_mode - Check whether TOMOYO is verbose mode. |
* ccs_verbose_mode - Check whether TOMOYO is verbose mode. |
951 |
* |
* |
952 |
* @domain: Pointer to "struct domain_info". NULL for current->domain_info. |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
953 |
* |
* |
954 |
* Returns true if domain policy violation warning should be printed to |
* Returns true if domain policy violation warning should be printed to |
955 |
* console. |
* console. |
956 |
*/ |
*/ |
957 |
bool ccs_verbose_mode(const struct domain_info *domain) |
bool ccs_verbose_mode(const struct ccs_domain_info *domain) |
958 |
{ |
{ |
959 |
return ccs_check_flags(domain, CCS_TOMOYO_VERBOSE) != 0; |
return ccs_check_flags(domain, CCS_VERBOSE) != 0; |
960 |
} |
} |
961 |
|
|
962 |
/** |
/** |
963 |
* ccs_check_domain_quota - Check for domain's quota. |
* ccs_domain_quota_ok - Check for domain's quota. |
964 |
* |
* |
965 |
* @domain: Pointer to "struct domain_info". |
* @r: Pointer to "struct ccs_request_info". |
966 |
* |
* |
967 |
* Returns true if the domain is not exceeded quota, false otherwise. |
* Returns true if the domain is not exceeded quota, false otherwise. |
968 |
|
* |
969 |
|
* Caller holds ccs_read_lock(). |
970 |
*/ |
*/ |
971 |
bool ccs_check_domain_quota(struct domain_info * const domain) |
bool ccs_domain_quota_ok(struct ccs_request_info *r) |
972 |
{ |
{ |
973 |
unsigned int count = 0; |
unsigned int count = 0; |
974 |
struct acl_info *ptr; |
struct ccs_domain_info *domain = r->domain; |
975 |
|
struct ccs_acl_info *ptr; |
976 |
|
ccs_check_read_lock(); |
977 |
|
if (r->mode != 1) |
978 |
|
return false; |
979 |
if (!domain) |
if (!domain) |
980 |
return true; |
return true; |
981 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
982 |
if (ptr->type & ACL_DELETED) |
if (ptr->is_deleted) |
983 |
continue; |
continue; |
984 |
switch (ccs_acl_type2(ptr)) { |
switch (ptr->type) { |
985 |
struct single_path_acl_record *acl1; |
struct ccs_path_acl *acl1; |
986 |
struct double_path_acl_record *acl2; |
struct ccs_path_path_acl *acl2; |
987 |
|
struct ccs_path_number_acl *acl3; |
988 |
|
struct ccs_path_number_number_acl *acl4; |
989 |
u16 perm; |
u16 perm; |
990 |
case TYPE_SINGLE_PATH_ACL: |
case CCS_TYPE_PATH_ACL: |
991 |
acl1 = container_of(ptr, struct single_path_acl_record, |
acl1 = container_of(ptr, struct ccs_path_acl, |
992 |
head); |
head); |
993 |
perm = acl1->perm; |
perm = acl1->perm; |
994 |
if (perm & (1 << TYPE_EXECUTE_ACL)) |
if (perm & (1 << CCS_TYPE_EXECUTE)) |
995 |
count++; |
count++; |
996 |
if (perm & |
if (perm & ((1 << CCS_TYPE_READ) | |
997 |
((1 << TYPE_READ_ACL) | (1 << TYPE_WRITE_ACL))) |
(1 << CCS_TYPE_WRITE))) |
998 |
count++; |
count++; |
999 |
if (perm & (1 << TYPE_CREATE_ACL)) |
if (perm & (1 << CCS_TYPE_CREATE)) |
1000 |
count++; |
count++; |
1001 |
if (perm & (1 << TYPE_UNLINK_ACL)) |
if (perm & (1 << CCS_TYPE_UNLINK)) |
1002 |
count++; |
count++; |
1003 |
if (perm & (1 << TYPE_MKDIR_ACL)) |
if (perm & (1 << CCS_TYPE_MKDIR)) |
1004 |
count++; |
count++; |
1005 |
if (perm & (1 << TYPE_RMDIR_ACL)) |
if (perm & (1 << CCS_TYPE_RMDIR)) |
1006 |
count++; |
count++; |
1007 |
if (perm & (1 << TYPE_MKFIFO_ACL)) |
if (perm & (1 << CCS_TYPE_MKFIFO)) |
1008 |
count++; |
count++; |
1009 |
if (perm & (1 << TYPE_MKSOCK_ACL)) |
if (perm & (1 << CCS_TYPE_MKSOCK)) |
1010 |
count++; |
count++; |
1011 |
if (perm & (1 << TYPE_MKBLOCK_ACL)) |
if (perm & (1 << CCS_TYPE_MKBLOCK)) |
1012 |
count++; |
count++; |
1013 |
if (perm & (1 << TYPE_MKCHAR_ACL)) |
if (perm & (1 << CCS_TYPE_MKCHAR)) |
1014 |
count++; |
count++; |
1015 |
if (perm & (1 << TYPE_TRUNCATE_ACL)) |
if (perm & (1 << CCS_TYPE_TRUNCATE)) |
1016 |
count++; |
count++; |
1017 |
if (perm & (1 << TYPE_SYMLINK_ACL)) |
if (perm & (1 << CCS_TYPE_SYMLINK)) |
1018 |
count++; |
count++; |
1019 |
if (perm & (1 << TYPE_REWRITE_ACL)) |
if (perm & (1 << CCS_TYPE_REWRITE)) |
1020 |
count++; |
count++; |
1021 |
break; |
break; |
1022 |
case TYPE_DOUBLE_PATH_ACL: |
case CCS_TYPE_PATH_PATH_ACL: |
1023 |
acl2 = container_of(ptr, struct double_path_acl_record, |
acl2 = container_of(ptr, |
1024 |
|
struct ccs_path_path_acl, |
1025 |
head); |
head); |
1026 |
perm = acl2->perm; |
perm = acl2->perm; |
1027 |
if (perm & (1 << TYPE_LINK_ACL)) |
if (perm & (1 << CCS_TYPE_LINK)) |
1028 |
|
count++; |
1029 |
|
if (perm & (1 << CCS_TYPE_RENAME)) |
1030 |
|
count++; |
1031 |
|
break; |
1032 |
|
case CCS_TYPE_EXECUTE_HANDLER: |
1033 |
|
case CCS_TYPE_DENIED_EXECUTE_HANDLER: |
1034 |
|
break; |
1035 |
|
case CCS_TYPE_PATH_NUMBER_ACL: |
1036 |
|
acl3 = container_of(ptr, |
1037 |
|
struct ccs_path_number_acl, |
1038 |
|
head); |
1039 |
|
perm = acl3->perm; |
1040 |
|
if (perm & (1 << CCS_TYPE_IOCTL)) |
1041 |
count++; |
count++; |
1042 |
if (perm & (1 << TYPE_RENAME_ACL)) |
if (perm & (1 << CCS_TYPE_CHMOD)) |
1043 |
|
count++; |
1044 |
|
if (perm & (1 << CCS_TYPE_CHOWN)) |
1045 |
|
count++; |
1046 |
|
if (perm & (1 << CCS_TYPE_CHGRP)) |
1047 |
count++; |
count++; |
1048 |
break; |
break; |
1049 |
case TYPE_EXECUTE_HANDLER: |
case CCS_TYPE_PATH_NUMBER_NUMBER_ACL: |
1050 |
case TYPE_DENIED_EXECUTE_HANDLER: |
acl4 = container_of(ptr, |
1051 |
|
struct ccs_path_number_number_acl, |
1052 |
|
head); |
1053 |
|
perm = acl4->perm; |
1054 |
|
if (perm & (1 << CCS_TYPE_MKBLOCK)) |
1055 |
|
count++; |
1056 |
|
if (perm & (1 << CCS_TYPE_MKCHAR)) |
1057 |
|
count++; |
1058 |
break; |
break; |
1059 |
|
|
1060 |
default: |
default: |
1061 |
count++; |
count++; |
1062 |
} |
} |
1063 |
} |
} |
1064 |
if (count < ccs_check_flags(domain, CCS_TOMOYO_MAX_ACCEPT_ENTRY)) |
if (count < ccs_check_flags(domain, CCS_MAX_ACCEPT_ENTRY)) |
1065 |
return true; |
return true; |
1066 |
if (!domain->quota_warned) { |
if (!domain->quota_warned) { |
1067 |
domain->quota_warned = true; |
domain->quota_warned = true; |
1071 |
} |
} |
1072 |
return false; |
return false; |
1073 |
} |
} |
|
|
|
|
/** |
|
|
* ccs_find_or_assign_new_profile - Create a new profile. |
|
|
* |
|
|
* @profile: Profile number to create. |
|
|
* |
|
|
* Returns pointer to "struct profile" on success, NULL otherwise. |
|
|
*/ |
|
|
static struct profile *ccs_find_or_assign_new_profile(const unsigned int |
|
|
profile) |
|
|
{ |
|
|
static DEFINE_MUTEX(lock); |
|
|
struct profile *ptr = NULL; |
|
|
mutex_lock(&lock); |
|
|
if (profile < MAX_PROFILES) { |
|
|
ptr = profile_ptr[profile]; |
|
|
if (ptr) |
|
|
goto ok; |
|
|
ptr = ccs_alloc_element(sizeof(*ptr)); |
|
|
if (ptr) { |
|
|
int i; |
|
|
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) |
|
|
ptr->value[i] |
|
|
= ccs_control_array[i].current_value; |
|
|
/* |
|
|
* Needn't to initialize "ptr->capability_value" |
|
|
* because they are always 0. |
|
|
*/ |
|
|
mb(); /* Avoid out-of-order execution. */ |
|
|
profile_ptr[profile] = ptr; |
|
|
} |
|
|
} |
|
|
ok: |
|
|
mutex_unlock(&lock); |
|
|
return ptr; |
|
|
} |
|
|
|
|
|
/** |
|
|
* write_profile - Write profile table. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int write_profile(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
unsigned int i; |
|
|
unsigned int value; |
|
|
char *cp; |
|
|
struct profile *profile; |
|
|
i = simple_strtoul(data, &cp, 10); |
|
|
if (data != cp) { |
|
|
if (*cp != '-') |
|
|
return -EINVAL; |
|
|
data = cp + 1; |
|
|
} |
|
|
profile = ccs_find_or_assign_new_profile(i); |
|
|
if (!profile) |
|
|
return -EINVAL; |
|
|
cp = strchr(data, '='); |
|
|
if (!cp) |
|
|
return -EINVAL; |
|
|
*cp = '\0'; |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_PROFILE); |
|
|
if (!strcmp(data, "COMMENT")) { |
|
|
profile->comment = ccs_save_name(cp + 1); |
|
|
return 0; |
|
|
} |
|
|
#ifdef CONFIG_TOMOYO |
|
|
if (str_starts(&data, KEYWORD_MAC_FOR_CAPABILITY)) { |
|
|
if (sscanf(cp + 1, "%u", &value) != 1) { |
|
|
for (i = 0; i < 4; i++) { |
|
|
if (strcmp(cp + 1, mode_4[i])) |
|
|
continue; |
|
|
value = i; |
|
|
break; |
|
|
} |
|
|
if (i == 4) |
|
|
return -EINVAL; |
|
|
} |
|
|
if (value > 3) |
|
|
value = 3; |
|
|
for (i = 0; i < TOMOYO_MAX_CAPABILITY_INDEX; i++) { |
|
|
if (strcmp(data, capability_control_keyword[i])) |
|
|
continue; |
|
|
profile->capability_value[i] = value; |
|
|
return 0; |
|
|
} |
|
|
return -EINVAL; |
|
|
} |
|
|
#endif |
|
|
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) { |
|
|
if (strcmp(data, ccs_control_array[i].keyword)) |
|
|
continue; |
|
|
if (sscanf(cp + 1, "%u", &value) != 1) { |
|
|
int j; |
|
|
const char **modes; |
|
|
switch (i) { |
|
|
case CCS_SAKURA_RESTRICT_AUTOBIND: |
|
|
case CCS_TOMOYO_VERBOSE: |
|
|
modes = mode_2; |
|
|
break; |
|
|
default: |
|
|
modes = mode_4; |
|
|
break; |
|
|
} |
|
|
for (j = 0; j < 4; j++) { |
|
|
if (strcmp(cp + 1, modes[j])) |
|
|
continue; |
|
|
value = j; |
|
|
break; |
|
|
} |
|
|
if (j == 4) |
|
|
return -EINVAL; |
|
|
} else if (value > ccs_control_array[i].max_value) { |
|
|
value = ccs_control_array[i].max_value; |
|
|
} |
|
|
switch (i) { |
|
|
case CCS_SAKURA_DENY_CONCEAL_MOUNT: |
|
|
case CCS_SAKURA_RESTRICT_UNMOUNT: |
|
|
if (value == 1) |
|
|
value = 2; /* learning mode is not supported. */ |
|
|
} |
|
|
profile->value[i] = value; |
|
|
return 0; |
|
|
} |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_profile - Read profile table. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int read_profile(struct ccs_io_buffer *head) |
|
|
{ |
|
|
static const int total |
|
|
= CCS_MAX_CONTROL_INDEX + TOMOYO_MAX_CAPABILITY_INDEX + 1; |
|
|
int step; |
|
|
if (head->read_eof) |
|
|
return 0; |
|
|
for (step = head->read_step; step < MAX_PROFILES * total; step++) { |
|
|
const u8 index = step / total; |
|
|
u8 type = step % total; |
|
|
const struct profile *profile = profile_ptr[index]; |
|
|
head->read_step = step; |
|
|
if (!profile) |
|
|
continue; |
|
|
#if !defined(CONFIG_SAKURA) || !defined(CONFIG_TOMOYO) |
|
|
switch (type) { |
|
|
#ifndef CONFIG_SAKURA |
|
|
case CCS_SAKURA_DENY_CONCEAL_MOUNT: |
|
|
case CCS_SAKURA_RESTRICT_CHROOT: |
|
|
case CCS_SAKURA_RESTRICT_MOUNT: |
|
|
case CCS_SAKURA_RESTRICT_UNMOUNT: |
|
|
case CCS_SAKURA_RESTRICT_PIVOT_ROOT: |
|
|
case CCS_SAKURA_RESTRICT_AUTOBIND: |
|
|
#endif |
|
|
#ifndef CONFIG_TOMOYO |
|
|
case CCS_TOMOYO_MAC_FOR_FILE: |
|
|
case CCS_TOMOYO_MAC_FOR_ARGV0: |
|
|
case CCS_TOMOYO_MAC_FOR_ENV: |
|
|
case CCS_TOMOYO_MAC_FOR_NETWORK: |
|
|
case CCS_TOMOYO_MAC_FOR_SIGNAL: |
|
|
case CCS_TOMOYO_MAX_ACCEPT_ENTRY: |
|
|
case CCS_TOMOYO_MAX_GRANT_LOG: |
|
|
case CCS_TOMOYO_MAX_REJECT_LOG: |
|
|
case CCS_TOMOYO_VERBOSE: |
|
|
#endif |
|
|
continue; |
|
|
} |
|
|
#endif |
|
|
if (!type) { /* Print profile' comment tag. */ |
|
|
if (!ccs_io_printf(head, "%u-COMMENT=%s\n", |
|
|
index, profile->comment ? |
|
|
profile->comment->name : "")) |
|
|
break; |
|
|
continue; |
|
|
} |
|
|
type--; |
|
|
if (type >= CCS_MAX_CONTROL_INDEX) { |
|
|
#ifdef CONFIG_TOMOYO |
|
|
const int i = type - CCS_MAX_CONTROL_INDEX; |
|
|
const u8 value = profile->capability_value[i]; |
|
|
if (!ccs_io_printf(head, |
|
|
"%u-" KEYWORD_MAC_FOR_CAPABILITY |
|
|
"%s=%s\n", index, |
|
|
capability_control_keyword[i], |
|
|
mode_4[value])) |
|
|
break; |
|
|
#endif |
|
|
} else { |
|
|
const unsigned int value = profile->value[type]; |
|
|
const char **modes = NULL; |
|
|
const char *keyword = ccs_control_array[type].keyword; |
|
|
switch (ccs_control_array[type].max_value) { |
|
|
case 3: |
|
|
modes = mode_4; |
|
|
break; |
|
|
case 1: |
|
|
modes = mode_2; |
|
|
break; |
|
|
} |
|
|
if (modes) { |
|
|
if (!ccs_io_printf(head, "%u-%s=%s\n", index, |
|
|
keyword, modes[value])) |
|
|
break; |
|
|
} else { |
|
|
if (!ccs_io_printf(head, "%u-%s=%u\n", index, |
|
|
keyword, value)) |
|
|
break; |
|
|
} |
|
|
} |
|
|
} |
|
|
if (step == MAX_PROFILES * total) |
|
|
head->read_eof = true; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* Structure for policy manager. */ |
|
|
struct policy_manager_entry { |
|
|
struct list1_head list; |
|
|
/* A path to program or a domainname. */ |
|
|
const struct path_info *manager; |
|
|
bool is_domain; /* True if manager is a domainname. */ |
|
|
bool is_deleted; /* True if this entry is deleted. */ |
|
|
}; |
|
|
|
|
|
/* The list for "struct policy_manager_entry". */ |
|
|
static LIST1_HEAD(policy_manager_list); |
|
|
|
|
|
/** |
|
|
* update_manager_entry - Add a manager entry. |
|
|
* |
|
|
* @manager: The path to manager or the domainnamme. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int update_manager_entry(const char *manager, const bool is_delete) |
|
|
{ |
|
|
struct policy_manager_entry *new_entry; |
|
|
struct policy_manager_entry *ptr; |
|
|
static DEFINE_MUTEX(lock); |
|
|
const struct path_info *saved_manager; |
|
|
int error = -ENOMEM; |
|
|
bool is_domain = false; |
|
|
if (ccs_is_domain_def(manager)) { |
|
|
if (!ccs_is_correct_domain(manager, __func__)) |
|
|
return -EINVAL; |
|
|
is_domain = true; |
|
|
} else { |
|
|
if (!ccs_is_correct_path(manager, 1, -1, -1, __func__)) |
|
|
return -EINVAL; |
|
|
} |
|
|
saved_manager = ccs_save_name(manager); |
|
|
if (!saved_manager) |
|
|
return -ENOMEM; |
|
|
mutex_lock(&lock); |
|
|
list1_for_each_entry(ptr, &policy_manager_list, list) { |
|
|
if (ptr->manager != saved_manager) |
|
|
continue; |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
goto out; |
|
|
} |
|
|
if (is_delete) { |
|
|
error = -ENOENT; |
|
|
goto out; |
|
|
} |
|
|
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
|
|
if (!new_entry) |
|
|
goto out; |
|
|
new_entry->manager = saved_manager; |
|
|
new_entry->is_domain = is_domain; |
|
|
list1_add_tail_mb(&new_entry->list, &policy_manager_list); |
|
|
error = 0; |
|
|
out: |
|
|
mutex_unlock(&lock); |
|
|
if (!error) |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_MANAGER); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* write_manager_policy - Write manager policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int write_manager_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
bool is_delete = str_starts(&data, KEYWORD_DELETE); |
|
|
if (!strcmp(data, "manage_by_non_root")) { |
|
|
manage_by_non_root = !is_delete; |
|
|
return 0; |
|
|
} |
|
|
return update_manager_entry(data, is_delete); |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_manager_policy - Read manager policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int read_manager_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list1_head *pos; |
|
|
if (head->read_eof) |
|
|
return 0; |
|
|
list1_for_each_cookie(pos, head->read_var2, &policy_manager_list) { |
|
|
struct policy_manager_entry *ptr; |
|
|
ptr = list1_entry(pos, struct policy_manager_entry, list); |
|
|
if (ptr->is_deleted) |
|
|
continue; |
|
|
if (!ccs_io_printf(head, "%s\n", ptr->manager->name)) |
|
|
return 0; |
|
|
} |
|
|
head->read_eof = true; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* is_policy_manager - Check whether the current process is a policy manager. |
|
|
* |
|
|
* Returns true if the current process is permitted to modify policy |
|
|
* via /proc/ccs/ interface. |
|
|
*/ |
|
|
static bool is_policy_manager(void) |
|
|
{ |
|
|
struct policy_manager_entry *ptr; |
|
|
const char *exe; |
|
|
struct task_struct *task = current; |
|
|
const struct path_info *domainname = task->domain_info->domainname; |
|
|
bool found = false; |
|
|
if (!sbin_init_started) |
|
|
return true; |
|
|
if (task->tomoyo_flags & CCS_TASK_IS_POLICY_MANAGER) |
|
|
return true; |
|
|
if (!manage_by_non_root && (task->uid || task->euid)) |
|
|
return false; |
|
|
list1_for_each_entry(ptr, &policy_manager_list, list) { |
|
|
if (!ptr->is_deleted && ptr->is_domain |
|
|
&& !ccs_pathcmp(domainname, ptr->manager)) { |
|
|
/* Set manager flag. */ |
|
|
task->tomoyo_flags |= CCS_TASK_IS_POLICY_MANAGER; |
|
|
return true; |
|
|
} |
|
|
} |
|
|
exe = ccs_get_exe(); |
|
|
if (!exe) |
|
|
return false; |
|
|
list1_for_each_entry(ptr, &policy_manager_list, list) { |
|
|
if (!ptr->is_deleted && !ptr->is_domain |
|
|
&& !strcmp(exe, ptr->manager->name)) { |
|
|
found = true; |
|
|
/* Set manager flag. */ |
|
|
task->tomoyo_flags |= CCS_TASK_IS_POLICY_MANAGER; |
|
|
break; |
|
|
} |
|
|
} |
|
|
if (!found) { /* Reduce error messages. */ |
|
|
static pid_t last_pid; |
|
|
const pid_t pid = current->pid; |
|
|
if (last_pid != pid) { |
|
|
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
|
|
"update policies.\n", domainname->name, exe); |
|
|
last_pid = pid; |
|
|
} |
|
|
} |
|
|
ccs_free(exe); |
|
|
return found; |
|
|
} |
|
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
|
|
|
|
/** |
|
|
* ccs_find_condition_part - Find condition part from the statement. |
|
|
* |
|
|
* @data: String to parse. |
|
|
* |
|
|
* Returns pointer to the condition part if it was found in the statement, |
|
|
* NULL otherwise. |
|
|
*/ |
|
|
static char *ccs_find_condition_part(char *data) |
|
|
{ |
|
|
char *cp = strstr(data, " if "); |
|
|
if (cp) { |
|
|
char *cp2; |
|
|
while ((cp2 = strstr(cp + 3, " if ")) != NULL) |
|
|
cp = cp2; |
|
|
*cp++ = '\0'; |
|
|
} else { |
|
|
cp = strstr(data, " ; set "); |
|
|
if (cp) |
|
|
*cp++ = '\0'; |
|
|
} |
|
|
return cp; |
|
|
} |
|
|
|
|
|
/** |
|
|
* is_select_one - Parse select command. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @data: String to parse. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool is_select_one(struct ccs_io_buffer *head, const char *data) |
|
|
{ |
|
|
unsigned int pid; |
|
|
struct domain_info *domain = NULL; |
|
|
if (sscanf(data, "pid=%u", &pid) == 1) { |
|
|
struct task_struct *p; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
read_lock(&tasklist_lock); |
|
|
p = find_task_by_pid(pid); |
|
|
if (p) |
|
|
domain = p->domain_info; |
|
|
read_unlock(&tasklist_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
} else if (!strncmp(data, "domain=", 7)) { |
|
|
if (ccs_is_domain_def(data + 7)) |
|
|
domain = ccs_find_domain(data + 7); |
|
|
} else |
|
|
return false; |
|
|
head->read_avail = 0; |
|
|
ccs_io_printf(head, "# select %s\n", data); |
|
|
head->read_single_domain = true; |
|
|
head->read_eof = !domain; |
|
|
if (domain) { |
|
|
struct domain_info *d; |
|
|
head->read_var1 = NULL; |
|
|
list1_for_each_entry(d, &domain_list, list) { |
|
|
if (d == domain) |
|
|
break; |
|
|
head->read_var1 = &d->list; |
|
|
} |
|
|
head->read_var2 = NULL; |
|
|
head->read_bit = 0; |
|
|
head->read_step = 0; |
|
|
if (domain->is_deleted) |
|
|
ccs_io_printf(head, "# This is a deleted domain.\n"); |
|
|
} |
|
|
head->write_var1 = domain; |
|
|
return true; |
|
|
} |
|
|
|
|
|
/** |
|
|
* write_domain_policy - Write domain policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int write_domain_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
struct domain_info *domain = head->write_var1; |
|
|
bool is_delete = false; |
|
|
bool is_select = false; |
|
|
bool is_undelete = false; |
|
|
unsigned int profile; |
|
|
const struct condition_list *cond = NULL; |
|
|
char *cp; |
|
|
if (str_starts(&data, KEYWORD_DELETE)) |
|
|
is_delete = true; |
|
|
else if (str_starts(&data, KEYWORD_SELECT)) |
|
|
is_select = true; |
|
|
else if (str_starts(&data, KEYWORD_UNDELETE)) |
|
|
is_undelete = true; |
|
|
if (is_select && is_select_one(head, data)) |
|
|
return 0; |
|
|
/* Don't allow updating policies by non manager programs. */ |
|
|
if (!is_policy_manager()) |
|
|
return -EPERM; |
|
|
if (ccs_is_domain_def(data)) { |
|
|
domain = NULL; |
|
|
if (is_delete) |
|
|
ccs_delete_domain(data); |
|
|
else if (is_select) |
|
|
domain = ccs_find_domain(data); |
|
|
else if (is_undelete) |
|
|
domain = ccs_undelete_domain(data); |
|
|
else |
|
|
domain = ccs_find_or_assign_new_domain(data, 0); |
|
|
head->write_var1 = domain; |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
|
return 0; |
|
|
} |
|
|
if (!domain) |
|
|
return -EINVAL; |
|
|
|
|
|
if (sscanf(data, KEYWORD_USE_PROFILE "%u", &profile) == 1 |
|
|
&& profile < MAX_PROFILES) { |
|
|
if (profile_ptr[profile] || !sbin_init_started) |
|
|
domain->profile = (u8) profile; |
|
|
return 0; |
|
|
} |
|
|
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { |
|
|
ccs_set_domain_flag(domain, is_delete, |
|
|
DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ); |
|
|
return 0; |
|
|
} |
|
|
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_ENV)) { |
|
|
ccs_set_domain_flag(domain, is_delete, |
|
|
DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_ENV); |
|
|
return 0; |
|
|
} |
|
|
cp = ccs_find_condition_part(data); |
|
|
if (cp) { |
|
|
cond = ccs_find_or_assign_new_condition(cp); |
|
|
if (!cond) |
|
|
return -EINVAL; |
|
|
} |
|
|
if (str_starts(&data, KEYWORD_ALLOW_CAPABILITY)) |
|
|
return ccs_write_capability_policy(data, domain, cond, |
|
|
is_delete); |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_NETWORK)) |
|
|
return ccs_write_network_policy(data, domain, cond, is_delete); |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_SIGNAL)) |
|
|
return ccs_write_signal_policy(data, domain, cond, is_delete); |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_ARGV0)) |
|
|
return ccs_write_argv0_policy(data, domain, cond, is_delete); |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_ENV)) |
|
|
return ccs_write_env_policy(data, domain, cond, is_delete); |
|
|
else |
|
|
return ccs_write_file_policy(data, domain, cond, is_delete); |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_single_path_acl - Print a single path ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct single_path_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_single_path_acl(struct ccs_io_buffer *head, |
|
|
struct single_path_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos; |
|
|
u8 bit; |
|
|
const char *atmark = ""; |
|
|
const char *filename; |
|
|
const u16 perm = ptr->perm; |
|
|
if (ptr->u_is_group) { |
|
|
atmark = "@"; |
|
|
filename = ptr->u.group->group_name->name; |
|
|
} else { |
|
|
filename = ptr->u.filename->name; |
|
|
} |
|
|
for (bit = head->read_bit; bit < MAX_SINGLE_PATH_OPERATION; bit++) { |
|
|
const char *msg; |
|
|
if (!(perm & (1 << bit))) |
|
|
continue; |
|
|
/* Print "read/write" instead of "read" and "write". */ |
|
|
if ((bit == TYPE_READ_ACL || bit == TYPE_WRITE_ACL) |
|
|
&& (perm & (1 << TYPE_READ_WRITE_ACL))) |
|
|
continue; |
|
|
msg = ccs_sp2keyword(bit); |
|
|
pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, "allow_%s %s%s", msg, |
|
|
atmark, filename) || |
|
|
!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
} |
|
|
head->read_bit = 0; |
|
|
return true; |
|
|
out: |
|
|
head->read_bit = bit; |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_double_path_acl - Print a double path ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct double_path_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_double_path_acl(struct ccs_io_buffer *head, |
|
|
struct double_path_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos; |
|
|
const char *atmark1 = ""; |
|
|
const char *atmark2 = ""; |
|
|
const char *filename1; |
|
|
const char *filename2; |
|
|
const u8 perm = ptr->perm; |
|
|
u8 bit; |
|
|
if (ptr->u1_is_group) { |
|
|
atmark1 = "@"; |
|
|
filename1 = ptr->u1.group1->group_name->name; |
|
|
} else { |
|
|
filename1 = ptr->u1.filename1->name; |
|
|
} |
|
|
if (ptr->u2_is_group) { |
|
|
atmark2 = "@"; |
|
|
filename2 = ptr->u2.group2->group_name->name; |
|
|
} else { |
|
|
filename2 = ptr->u2.filename2->name; |
|
|
} |
|
|
for (bit = head->read_bit; bit < MAX_DOUBLE_PATH_OPERATION; bit++) { |
|
|
const char *msg; |
|
|
if (!(perm & (1 << bit))) |
|
|
continue; |
|
|
msg = ccs_dp2keyword(bit); |
|
|
pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, "allow_%s %s%s %s%s", msg, |
|
|
atmark1, filename1, atmark2, filename2) || |
|
|
!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
} |
|
|
head->read_bit = 0; |
|
|
return true; |
|
|
out: |
|
|
head->read_bit = bit; |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_argv0_acl - Print an argv[0] ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct argv0_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_argv0_acl(struct ccs_io_buffer *head, |
|
|
struct argv0_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_ARGV0 "%s %s", |
|
|
ptr->filename->name, ptr->argv0->name)) |
|
|
goto out; |
|
|
if (!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
return true; |
|
|
out: |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_env_acl - Print an evironment variable name's ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct env_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_env_acl(struct ccs_io_buffer *head, |
|
|
struct env_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_ENV "%s", ptr->env->name)) |
|
|
goto out; |
|
|
if (!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
return true; |
|
|
out: |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_capability_acl - Print a capability ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct capability_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_capability_acl(struct ccs_io_buffer *head, |
|
|
struct capability_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_CAPABILITY "%s", |
|
|
ccs_cap2keyword(ptr->operation))) |
|
|
goto out; |
|
|
if (!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
return true; |
|
|
out: |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_ipv4_entry - Print IPv4 address of a network ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_ipv4_entry(struct ccs_io_buffer *head, |
|
|
struct ip_network_acl_record *ptr) |
|
|
{ |
|
|
const u32 min_address = ptr->u.ipv4.min; |
|
|
const u32 max_address = ptr->u.ipv4.max; |
|
|
if (!ccs_io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) |
|
|
return false; |
|
|
if (min_address != max_address |
|
|
&& !ccs_io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) |
|
|
return false; |
|
|
return true; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_ipv6_entry - Print IPv6 address of a network ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_ipv6_entry(struct ccs_io_buffer *head, |
|
|
struct ip_network_acl_record *ptr) |
|
|
{ |
|
|
char buf[64]; |
|
|
const struct in6_addr *min_address = ptr->u.ipv6.min; |
|
|
const struct in6_addr *max_address = ptr->u.ipv6.max; |
|
|
ccs_print_ipv6(buf, sizeof(buf), min_address); |
|
|
if (!ccs_io_printf(head, "%s", buf)) |
|
|
return false; |
|
|
if (min_address != max_address) { |
|
|
ccs_print_ipv6(buf, sizeof(buf), max_address); |
|
|
if (!ccs_io_printf(head, "-%s", buf)) |
|
|
return false; |
|
|
} |
|
|
return true; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_port_entry - Print port number of a network ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_port_entry(struct ccs_io_buffer *head, |
|
|
struct ip_network_acl_record *ptr) |
|
|
{ |
|
|
const u16 min_port = ptr->min_port, max_port = ptr->max_port; |
|
|
if (!ccs_io_printf(head, " %u", min_port)) |
|
|
return false; |
|
|
if (min_port != max_port && !ccs_io_printf(head, "-%u", max_port)) |
|
|
return false; |
|
|
return true; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_network_acl - Print a network ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_network_acl(struct ccs_io_buffer *head, |
|
|
struct ip_network_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_NETWORK "%s ", |
|
|
ccs_net2keyword(ptr->operation_type))) |
|
|
goto out; |
|
|
switch (ptr->record_type) { |
|
|
case IP_RECORD_TYPE_ADDRESS_GROUP: |
|
|
if (!ccs_io_printf(head, "@%s", ptr->u.group->group_name->name)) |
|
|
goto out; |
|
|
break; |
|
|
case IP_RECORD_TYPE_IPv4: |
|
|
if (!print_ipv4_entry(head, ptr)) |
|
|
goto out; |
|
|
break; |
|
|
case IP_RECORD_TYPE_IPv6: |
|
|
if (!print_ipv6_entry(head, ptr)) |
|
|
goto out; |
|
|
break; |
|
|
} |
|
|
if (!print_port_entry(head, ptr)) |
|
|
goto out; |
|
|
if (!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
return true; |
|
|
out: |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_signal_acl - Print a signal ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to "struct signale_acl_record". |
|
|
* @cond: Pointer to "struct condition_list". May be NULL. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_signal_acl(struct ccs_io_buffer *head, |
|
|
struct signal_acl_record *ptr, |
|
|
const struct condition_list *cond) |
|
|
{ |
|
|
int pos = head->read_avail; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALLOW_SIGNAL "%u %s", |
|
|
ptr->sig, ptr->domainname->name)) |
|
|
goto out; |
|
|
if (!ccs_print_condition(head, cond)) |
|
|
goto out; |
|
|
return true; |
|
|
out: |
|
|
head->read_avail = pos; |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_execute_handler_record - Print an execute handler ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @keyword: Name of the keyword. |
|
|
* @ptr: Pointer to "struct execute_handler_record". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_execute_handler_record(struct ccs_io_buffer *head, |
|
|
const char *keyword, |
|
|
struct execute_handler_record *ptr) |
|
|
{ |
|
|
return ccs_io_printf(head, "%s %s\n", keyword, ptr->handler->name); |
|
|
} |
|
|
|
|
|
/** |
|
|
* print_entry - Print an ACL entry. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* @ptr: Pointer to an ACL entry. |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool print_entry(struct ccs_io_buffer *head, struct acl_info *ptr) |
|
|
{ |
|
|
const struct condition_list *cond = ccs_get_condition_part(ptr); |
|
|
const u8 acl_type = ccs_acl_type2(ptr); |
|
|
if (acl_type & ACL_DELETED) |
|
|
return true; |
|
|
if (acl_type == TYPE_SINGLE_PATH_ACL) { |
|
|
struct single_path_acl_record *acl |
|
|
= container_of(ptr, struct single_path_acl_record, |
|
|
head); |
|
|
return print_single_path_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_DOUBLE_PATH_ACL) { |
|
|
struct double_path_acl_record *acl |
|
|
= container_of(ptr, struct double_path_acl_record, |
|
|
head); |
|
|
return print_double_path_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_ARGV0_ACL) { |
|
|
struct argv0_acl_record *acl |
|
|
= container_of(ptr, struct argv0_acl_record, head); |
|
|
return print_argv0_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_ENV_ACL) { |
|
|
struct env_acl_record *acl |
|
|
= container_of(ptr, struct env_acl_record, head); |
|
|
return print_env_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_CAPABILITY_ACL) { |
|
|
struct capability_acl_record *acl |
|
|
= container_of(ptr, struct capability_acl_record, head); |
|
|
return print_capability_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_IP_NETWORK_ACL) { |
|
|
struct ip_network_acl_record *acl |
|
|
= container_of(ptr, struct ip_network_acl_record, head); |
|
|
return print_network_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_SIGNAL_ACL) { |
|
|
struct signal_acl_record *acl |
|
|
= container_of(ptr, struct signal_acl_record, head); |
|
|
return print_signal_acl(head, acl, cond); |
|
|
} |
|
|
if (acl_type == TYPE_EXECUTE_HANDLER) { |
|
|
struct execute_handler_record *acl |
|
|
= container_of(ptr, struct execute_handler_record, |
|
|
head); |
|
|
const char *keyword = KEYWORD_EXECUTE_HANDLER; |
|
|
return print_execute_handler_record(head, keyword, acl); |
|
|
} |
|
|
if (acl_type == TYPE_DENIED_EXECUTE_HANDLER) { |
|
|
struct execute_handler_record *acl |
|
|
= container_of(ptr, struct execute_handler_record, |
|
|
head); |
|
|
const char *keyword = KEYWORD_DENIED_EXECUTE_HANDLER; |
|
|
return print_execute_handler_record(head, keyword, acl); |
|
|
} |
|
|
/* Workaround for gcc 3.2.2's inline bug. */ |
|
|
if (acl_type & ACL_DELETED) |
|
|
return true; |
|
|
BUG(); /* This must not happen. */ |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_domain_policy - Read domain policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int read_domain_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list1_head *dpos; |
|
|
struct list1_head *apos; |
|
|
if (head->read_eof) |
|
|
return 0; |
|
|
if (head->read_step == 0) |
|
|
head->read_step = 1; |
|
|
list1_for_each_cookie(dpos, head->read_var1, &domain_list) { |
|
|
struct domain_info *domain; |
|
|
const char *quota_exceeded = ""; |
|
|
const char *transition_failed = ""; |
|
|
const char *ignore_global_allow_read = ""; |
|
|
const char *ignore_global_allow_env = ""; |
|
|
domain = list1_entry(dpos, struct domain_info, list); |
|
|
if (head->read_step != 1) |
|
|
goto acl_loop; |
|
|
if (domain->is_deleted && !head->read_single_domain) |
|
|
continue; |
|
|
/* Print domainname and flags. */ |
|
|
if (domain->quota_warned) |
|
|
quota_exceeded = "quota_exceeded\n"; |
|
|
if (domain->flags & DOMAIN_FLAGS_TRANSITION_FAILED) |
|
|
transition_failed = "transition_failed\n"; |
|
|
if (domain->flags & DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ) |
|
|
ignore_global_allow_read |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; |
|
|
if (domain->flags & DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_ENV) |
|
|
ignore_global_allow_env |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_ENV "\n"; |
|
|
if (!ccs_io_printf(head, "%s\n" KEYWORD_USE_PROFILE "%u\n" |
|
|
"%s%s%s%s\n", domain->domainname->name, |
|
|
domain->profile, quota_exceeded, |
|
|
transition_failed, |
|
|
ignore_global_allow_read, |
|
|
ignore_global_allow_env)) |
|
|
return 0; |
|
|
head->read_step = 2; |
|
|
acl_loop: |
|
|
if (head->read_step == 3) |
|
|
goto tail_mark; |
|
|
/* Print ACL entries in the domain. */ |
|
|
list1_for_each_cookie(apos, head->read_var2, |
|
|
&domain->acl_info_list) { |
|
|
struct acl_info *ptr |
|
|
= list1_entry(apos, struct acl_info, list); |
|
|
if (!print_entry(head, ptr)) |
|
|
return 0; |
|
|
} |
|
|
head->read_step = 3; |
|
|
tail_mark: |
|
|
if (!ccs_io_printf(head, "\n")) |
|
|
return 0; |
|
|
head->read_step = 1; |
|
|
if (head->read_single_domain) |
|
|
break; |
|
|
} |
|
|
head->read_eof = true; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#endif |
|
|
|
|
|
/** |
|
|
* write_domain_profile - Assign profile for specified domain. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, -EINVAL otherwise. |
|
|
* |
|
|
* This is equivalent to doing |
|
|
* |
|
|
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
|
|
* /usr/lib/ccs/loadpolicy -d |
|
|
*/ |
|
|
static int write_domain_profile(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
char *cp = strchr(data, ' '); |
|
|
struct domain_info *domain; |
|
|
unsigned int profile; |
|
|
if (!cp) |
|
|
return -EINVAL; |
|
|
*cp = '\0'; |
|
|
domain = ccs_find_domain(cp + 1); |
|
|
profile = simple_strtoul(data, NULL, 10); |
|
|
if (domain && profile < MAX_PROFILES |
|
|
&& (profile_ptr[profile] || !sbin_init_started)) |
|
|
domain->profile = (u8) profile; |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_domain_profile - Read only domainname and profile. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns list of profile number and domainname pairs. |
|
|
* |
|
|
* This is equivalent to doing |
|
|
* |
|
|
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
|
|
* awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) |
|
|
* domainname = $0; } else if ( $1 == "use_profile" ) { |
|
|
* print $2 " " domainname; domainname = ""; } } ; ' |
|
|
*/ |
|
|
static int read_domain_profile(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list1_head *pos; |
|
|
if (head->read_eof) |
|
|
return 0; |
|
|
list1_for_each_cookie(pos, head->read_var1, &domain_list) { |
|
|
struct domain_info *domain; |
|
|
domain = list1_entry(pos, struct domain_info, list); |
|
|
if (domain->is_deleted) |
|
|
continue; |
|
|
if (!ccs_io_printf(head, "%u %s\n", domain->profile, |
|
|
domain->domainname->name)) |
|
|
return 0; |
|
|
} |
|
|
head->read_eof = true; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* write_pid: Specify PID to obtain domainname. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int write_pid(struct ccs_io_buffer *head) |
|
|
{ |
|
|
head->read_eof = false; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_pid - Read information of a process. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns the domainname which the specified PID is in or |
|
|
* process information of the specified PID on success, |
|
|
* empty string otherwise. |
|
|
*/ |
|
|
static int read_pid(struct ccs_io_buffer *head) |
|
|
{ |
|
|
/* Accessing write_buf is safe because head->io_sem is held. */ |
|
|
char *buf = head->write_buf; |
|
|
bool task_info = false; |
|
|
unsigned int pid; |
|
|
struct task_struct *p; |
|
|
struct domain_info *domain = NULL; |
|
|
u32 tomoyo_flags = 0; |
|
|
if (head->read_avail || head->read_eof) |
|
|
goto done; |
|
|
head->read_eof = true; |
|
|
if (str_starts(&buf, "info ")) |
|
|
task_info = true; |
|
|
pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
read_lock(&tasklist_lock); |
|
|
p = find_task_by_pid(pid); |
|
|
if (p) { |
|
|
domain = p->domain_info; |
|
|
tomoyo_flags = p->tomoyo_flags; |
|
|
} |
|
|
read_unlock(&tasklist_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (!domain) |
|
|
goto done; |
|
|
if (!task_info) |
|
|
ccs_io_printf(head, "%u %u %s", pid, domain->profile, |
|
|
domain->domainname->name); |
|
|
else |
|
|
ccs_io_printf(head, "%u manager=%s execute_handler=%s " |
|
|
"state[0]=%u state[1]=%u state[2]=%u", pid, |
|
|
tomoyo_flags & CCS_TASK_IS_POLICY_MANAGER ? |
|
|
"yes" : "no", |
|
|
tomoyo_flags & TOMOYO_TASK_IS_EXECUTE_HANDLER ? |
|
|
"yes" : "no", |
|
|
(u8) (tomoyo_flags >> 24), |
|
|
(u8) (tomoyo_flags >> 16), |
|
|
(u8) (tomoyo_flags >> 8)); |
|
|
done: |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
|
|
|
|
/** |
|
|
* write_exception_policy - Write exception policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int write_exception_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
bool is_delete = str_starts(&data, KEYWORD_DELETE); |
|
|
if (str_starts(&data, KEYWORD_KEEP_DOMAIN)) |
|
|
return ccs_write_domain_keeper_policy(data, false, is_delete); |
|
|
if (str_starts(&data, KEYWORD_NO_KEEP_DOMAIN)) |
|
|
return ccs_write_domain_keeper_policy(data, true, is_delete); |
|
|
if (str_starts(&data, KEYWORD_INITIALIZE_DOMAIN)) |
|
|
return ccs_write_domain_initializer_policy(data, false, |
|
|
is_delete); |
|
|
if (str_starts(&data, KEYWORD_NO_INITIALIZE_DOMAIN)) |
|
|
return ccs_write_domain_initializer_policy(data, true, |
|
|
is_delete); |
|
|
if (str_starts(&data, KEYWORD_ALIAS)) |
|
|
return ccs_write_alias_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_AGGREGATOR)) |
|
|
return ccs_write_aggregator_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_ALLOW_READ)) |
|
|
return ccs_write_globally_readable_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_ALLOW_ENV)) |
|
|
return ccs_write_globally_usable_env_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_FILE_PATTERN)) |
|
|
return ccs_write_pattern_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_PATH_GROUP)) |
|
|
return ccs_write_path_group_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_DENY_REWRITE)) |
|
|
return ccs_write_no_rewrite_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_ADDRESS_GROUP)) |
|
|
return ccs_write_address_group_policy(data, is_delete); |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_exception_policy - Read exception policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, -EINVAL otherwise. |
|
|
*/ |
|
|
static int read_exception_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
switch (head->read_step) { |
|
|
case 0: |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 1; |
|
|
case 1: |
|
|
if (!ccs_read_domain_keeper_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 2; |
|
|
case 2: |
|
|
if (!ccs_read_globally_readable_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 3; |
|
|
case 3: |
|
|
if (!ccs_read_globally_usable_env_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 4; |
|
|
case 4: |
|
|
if (!ccs_read_domain_initializer_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 5; |
|
|
case 5: |
|
|
if (!ccs_read_alias_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 6; |
|
|
case 6: |
|
|
if (!ccs_read_aggregator_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 7; |
|
|
case 7: |
|
|
if (!ccs_read_file_pattern(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 8; |
|
|
case 8: |
|
|
if (!ccs_read_no_rewrite_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 9; |
|
|
case 9: |
|
|
if (!ccs_read_path_group_policy(head)) |
|
|
break; |
|
|
head->read_var1 = NULL; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 10; |
|
|
case 10: |
|
|
if (!ccs_read_address_group_policy(head)) |
|
|
break; |
|
|
head->read_eof = true; |
|
|
break; |
|
|
default: |
|
|
return -EINVAL; |
|
|
} |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#endif |
|
|
|
|
|
#ifdef CONFIG_SAKURA |
|
|
|
|
|
/** |
|
|
* write_system_policy - Write system policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int write_system_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
bool is_delete = false; |
|
|
if (str_starts(&data, KEYWORD_DELETE)) |
|
|
is_delete = true; |
|
|
if (str_starts(&data, KEYWORD_ALLOW_MOUNT)) |
|
|
return ccs_write_mount_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_DENY_UNMOUNT)) |
|
|
return ccs_write_no_umount_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_ALLOW_CHROOT)) |
|
|
return ccs_write_chroot_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_ALLOW_PIVOT_ROOT)) |
|
|
return ccs_write_pivot_root_policy(data, is_delete); |
|
|
if (str_starts(&data, KEYWORD_DENY_AUTOBIND)) |
|
|
return ccs_write_reserved_port_policy(data, is_delete); |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_system_policy - Read system policy. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, -EINVAL otherwise. |
|
|
*/ |
|
|
static int read_system_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
switch (head->read_step) { |
|
|
case 0: |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 1; |
|
|
case 1: |
|
|
if (!ccs_read_mount_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 2; |
|
|
case 2: |
|
|
if (!ccs_read_no_umount_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 3; |
|
|
case 3: |
|
|
if (!ccs_read_chroot_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 4; |
|
|
case 4: |
|
|
if (!ccs_read_pivot_root_policy(head)) |
|
|
break; |
|
|
head->read_var2 = NULL; |
|
|
head->read_step = 5; |
|
|
case 5: |
|
|
if (!ccs_read_reserved_port_policy(head)) |
|
|
break; |
|
|
head->read_eof = true; |
|
|
break; |
|
|
default: |
|
|
return -EINVAL; |
|
|
} |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#endif |
|
|
|
|
|
/* Path to the policy loader. The default is /sbin/ccs-init. */ |
|
|
static const char *ccs_loader; |
|
|
|
|
|
/** |
|
|
* loader_setup - Specify the policy loader to use. |
|
|
* |
|
|
* @str: Path to the policy loader. |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int __init loader_setup(char *str) |
|
|
{ |
|
|
ccs_loader = str; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
__setup("CCS_loader=", loader_setup); |
|
|
|
|
|
/** |
|
|
* policy_loader_exists - Check whether /sbin/ccs-init exists. |
|
|
* |
|
|
* Returns true if /sbin/ccs-init exists, false otherwise. |
|
|
*/ |
|
|
static bool policy_loader_exists(void) |
|
|
{ |
|
|
/* |
|
|
* Don't activate MAC if the path given by 'CCS_loader=' option doesn't |
|
|
* exist. If the initrd includes /sbin/init but real-root-dev has not |
|
|
* mounted on / yet, activating MAC will block the system since |
|
|
* policies are not loaded yet. |
|
|
* Thus, let do_execve() call this function everytime. |
|
|
*/ |
|
|
struct nameidata nd; |
|
|
if (!ccs_loader) |
|
|
ccs_loader = "/sbin/ccs-init"; |
|
|
if (path_lookup(ccs_loader, lookup_flags, &nd)) { |
|
|
printk(KERN_INFO "Not activating Mandatory Access Control now " |
|
|
"since %s doesn't exist.\n", ccs_loader); |
|
|
return false; |
|
|
} |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
|
|
path_put(&nd.path); |
|
|
#else |
|
|
path_release(&nd); |
|
|
#endif |
|
|
return true; |
|
|
} |
|
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
|
|
/** |
|
|
* run_ccs_loader - Start /sbin/ccs-init . |
|
|
* |
|
|
* @unused: Not used. |
|
|
* |
|
|
* Returns PID of /sbin/ccs-init on success, negative value otherwise. |
|
|
*/ |
|
|
static int run_ccs_loader(void *unused) |
|
|
{ |
|
|
char *argv[2]; |
|
|
char *envp[3]; |
|
|
printk(KERN_INFO "Calling %s to load policy. Please wait.\n", |
|
|
ccs_loader); |
|
|
argv[0] = (char *) ccs_loader; |
|
|
argv[1] = NULL; |
|
|
envp[0] = "HOME=/"; |
|
|
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; |
|
|
envp[2] = NULL; |
|
|
return exec_usermodehelper(argv[0], argv, envp); |
|
|
} |
|
|
#endif |
|
|
|
|
|
/** |
|
|
* ccs_load_policy - Run external policy loader to load policy. |
|
|
* |
|
|
* @filename: The program about to start. |
|
|
* |
|
|
* This function checks whether @filename is /sbin/init , and if so |
|
|
* invoke /sbin/ccs-init and wait for the termination of /sbin/ccs-init |
|
|
* and then continues invocation of /sbin/init. |
|
|
* /sbin/ccs-init reads policy files in /etc/ccs/ directory and |
|
|
* writes to /proc/ccs/ interfaces. |
|
|
* |
|
|
* Returns nothing. |
|
|
*/ |
|
|
void ccs_load_policy(const char *filename) |
|
|
{ |
|
|
if (sbin_init_started) |
|
|
return; |
|
|
/* |
|
|
* Check filename is /sbin/init or /sbin/ccs-start. |
|
|
* /sbin/ccs-start is a dummy filename in case where /sbin/init can't |
|
|
* be passed. |
|
|
* You can create /sbin/ccs-start by "ln -s /bin/true /sbin/ccs-start". |
|
|
*/ |
|
|
if (strcmp(filename, "/sbin/init") && |
|
|
strcmp(filename, "/sbin/ccs-start")) |
|
|
return; |
|
|
if (!policy_loader_exists()) |
|
|
return; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
|
|
{ |
|
|
char *argv[2]; |
|
|
char *envp[3]; |
|
|
printk(KERN_INFO "Calling %s to load policy. Please wait.\n", |
|
|
ccs_loader); |
|
|
argv[0] = (char *) ccs_loader; |
|
|
argv[1] = NULL; |
|
|
envp[0] = "HOME=/"; |
|
|
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; |
|
|
envp[2] = NULL; |
|
|
call_usermodehelper(argv[0], argv, envp, 1); |
|
|
} |
|
|
#elif defined(TASK_DEAD) |
|
|
{ |
|
|
/* Copied from kernel/kmod.c */ |
|
|
struct task_struct *task = current; |
|
|
pid_t pid = kernel_thread(run_ccs_loader, NULL, 0); |
|
|
sigset_t tmpsig; |
|
|
spin_lock_irq(&task->sighand->siglock); |
|
|
tmpsig = task->blocked; |
|
|
siginitsetinv(&task->blocked, |
|
|
sigmask(SIGKILL) | sigmask(SIGSTOP)); |
|
|
recalc_sigpending(); |
|
|
spin_unlock_irq(¤t->sighand->siglock); |
|
|
if (pid >= 0) |
|
|
waitpid(pid, NULL, __WCLONE); |
|
|
spin_lock_irq(&task->sighand->siglock); |
|
|
task->blocked = tmpsig; |
|
|
recalc_sigpending(); |
|
|
spin_unlock_irq(&task->sighand->siglock); |
|
|
} |
|
|
#else |
|
|
{ |
|
|
/* Copied from kernel/kmod.c */ |
|
|
struct task_struct *task = current; |
|
|
pid_t pid = kernel_thread(run_ccs_loader, NULL, 0); |
|
|
sigset_t tmpsig; |
|
|
spin_lock_irq(&task->sigmask_lock); |
|
|
tmpsig = task->blocked; |
|
|
siginitsetinv(&task->blocked, |
|
|
sigmask(SIGKILL) | sigmask(SIGSTOP)); |
|
|
recalc_sigpending(task); |
|
|
spin_unlock_irq(&task->sigmask_lock); |
|
|
if (pid >= 0) |
|
|
waitpid(pid, NULL, __WCLONE); |
|
|
spin_lock_irq(&task->sigmask_lock); |
|
|
task->blocked = tmpsig; |
|
|
recalc_sigpending(task); |
|
|
spin_unlock_irq(&task->sigmask_lock); |
|
|
} |
|
|
#endif |
|
|
#ifdef CONFIG_SAKURA |
|
|
printk(KERN_INFO "SAKURA: 1.6.5-pre 2008/10/20\n"); |
|
|
#endif |
|
|
#ifdef CONFIG_TOMOYO |
|
|
printk(KERN_INFO "TOMOYO: 1.6.5-pre 2008/10/20\n"); |
|
|
#endif |
|
|
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
|
|
sbin_init_started = true; |
|
|
ccs_log_level = KERN_WARNING; |
|
|
{ /* Check all profiles currently assigned to domains are defined. */ |
|
|
struct domain_info *domain; |
|
|
list1_for_each_entry(domain, &domain_list, list) { |
|
|
const u8 profile = domain->profile; |
|
|
if (profile_ptr[profile]) |
|
|
continue; |
|
|
panic("Profile %u (used by '%s') not defined.\n", |
|
|
profile, domain->domainname->name); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* Wait queue for query_list. */ |
|
|
static DECLARE_WAIT_QUEUE_HEAD(query_wait); |
|
|
|
|
|
/* Lock for manipulating query_list. */ |
|
|
static DEFINE_SPINLOCK(query_list_lock); |
|
|
|
|
|
/* Structure for query. */ |
|
|
struct query_entry { |
|
|
struct list_head list; |
|
|
char *query; |
|
|
int query_len; |
|
|
unsigned int serial; |
|
|
int timer; |
|
|
int answer; |
|
|
}; |
|
|
|
|
|
/* The list for "struct query_entry". */ |
|
|
static LIST_HEAD(query_list); |
|
|
|
|
|
/* Number of "struct file" referring /proc/ccs/query interface. */ |
|
|
static atomic_t queryd_watcher = ATOMIC_INIT(0); |
|
|
|
|
|
/** |
|
|
* ccs_check_supervisor - Ask for the supervisor's decision. |
|
|
* |
|
|
* @r: Pointer to "struct ccs_request_info". |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
|
|
* |
|
|
* Returns 0 if the supervisor decided to permit the access request which |
|
|
* violated the policy in enforcing mode, 1 if the supervisor decided to |
|
|
* retry the access request which violated the policy in enforcing mode, |
|
|
* -EPERM otherwise. |
|
|
*/ |
|
|
int ccs_check_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
|
|
{ |
|
|
va_list args; |
|
|
int error = -EPERM; |
|
|
int pos; |
|
|
int len; |
|
|
static unsigned int serial; |
|
|
struct query_entry *query_entry = NULL; |
|
|
char *header; |
|
|
if (!r->domain) |
|
|
r->domain = current->domain_info; |
|
|
if (!atomic_read(&queryd_watcher)) { |
|
|
int i; |
|
|
if (current->tomoyo_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) |
|
|
return -EPERM; |
|
|
for (i = 0; i < ccs_check_flags(r->domain, CCS_SLEEP_PERIOD); |
|
|
i++) { |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
|
|
schedule_timeout(HZ / 10); |
|
|
} |
|
|
return -EPERM; |
|
|
} |
|
|
va_start(args, fmt); |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
|
|
va_end(args); |
|
|
#ifdef CONFIG_TOMOYO |
|
|
header = ccs_init_audit_log(&len, r); |
|
|
#else |
|
|
header = ccs_alloc(1); |
|
|
#endif |
|
|
if (!header) |
|
|
goto out; |
|
|
query_entry = ccs_alloc(sizeof(*query_entry)); |
|
|
if (!query_entry) |
|
|
goto out; |
|
|
query_entry->query = ccs_alloc(len); |
|
|
if (!query_entry->query) |
|
|
goto out; |
|
|
INIT_LIST_HEAD(&query_entry->list); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
query_entry->serial = serial++; |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
pos = snprintf(query_entry->query, len - 1, "Q%u-%hu\n%s", |
|
|
query_entry->serial, r->retry, header); |
|
|
ccs_free(header); |
|
|
header = NULL; |
|
|
va_start(args, fmt); |
|
|
vsnprintf(query_entry->query + pos, len - 1 - pos, fmt, args); |
|
|
query_entry->query_len = strlen(query_entry->query) + 1; |
|
|
va_end(args); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_add_tail(&query_entry->list, &query_list); |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_QUERY); |
|
|
/* Give 10 seconds for supervisor's opinion. */ |
|
|
for (query_entry->timer = 0; atomic_read(&queryd_watcher) |
|
|
&& query_entry->timer < 100; query_entry->timer++) { |
|
|
wake_up(&query_wait); |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
|
|
schedule_timeout(HZ / 10); |
|
|
if (query_entry->answer) |
|
|
break; |
|
|
} |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_QUERY); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_del(&query_entry->list); |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
switch (query_entry->answer) { |
|
|
case 3: /* Asked to retry by administrator. */ |
|
|
error = 1; |
|
|
break; |
|
|
case 1: |
|
|
/* Granted by administrator. */ |
|
|
error = 0; |
|
|
break; |
|
|
case 0: |
|
|
/* Timed out. */ |
|
|
break; |
|
|
default: |
|
|
/* Rejected by administrator. */ |
|
|
break; |
|
|
} |
|
|
out: |
|
|
if (query_entry) |
|
|
ccs_free(query_entry->query); |
|
|
ccs_free(query_entry); |
|
|
ccs_free(header); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* poll_query - poll() for /proc/ccs/query. |
|
|
* |
|
|
* @file: Pointer to "struct file". |
|
|
* @wait: Pointer to "poll_table". |
|
|
* |
|
|
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
|
|
* |
|
|
* Waits for access requests which violated policy in enforcing mode. |
|
|
*/ |
|
|
static int poll_query(struct file *file, poll_table *wait) |
|
|
{ |
|
|
struct list_head *tmp; |
|
|
bool found = false; |
|
|
u8 i; |
|
|
for (i = 0; i < 2; i++) { |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr |
|
|
= list_entry(tmp, struct query_entry, list); |
|
|
if (ptr->answer) |
|
|
continue; |
|
|
found = true; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (found) |
|
|
return POLLIN | POLLRDNORM; |
|
|
if (i) |
|
|
break; |
|
|
poll_wait(file, &query_wait, wait); |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_query - Read access requests which violated policy in enforcing mode. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
static int read_query(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list_head *tmp; |
|
|
int pos = 0; |
|
|
int len = 0; |
|
|
char *buf; |
|
|
if (head->read_avail) |
|
|
return 0; |
|
|
if (head->read_buf) { |
|
|
ccs_free(head->read_buf); |
|
|
head->read_buf = NULL; |
|
|
head->readbuf_size = 0; |
|
|
} |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr |
|
|
= list_entry(tmp, struct query_entry, list); |
|
|
if (ptr->answer) |
|
|
continue; |
|
|
if (pos++ != head->read_step) |
|
|
continue; |
|
|
len = ptr->query_len; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (!len) { |
|
|
head->read_step = 0; |
|
|
return 0; |
|
|
} |
|
|
buf = ccs_alloc(len); |
|
|
if (!buf) |
|
|
return 0; |
|
|
pos = 0; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr |
|
|
= list_entry(tmp, struct query_entry, list); |
|
|
if (ptr->answer) |
|
|
continue; |
|
|
if (pos++ != head->read_step) |
|
|
continue; |
|
|
/* |
|
|
* Some query can be skipped because query_list |
|
|
* can change, but I don't care. |
|
|
*/ |
|
|
if (len == ptr->query_len) |
|
|
memmove(buf, ptr->query, len); |
|
|
break; |
|
|
} |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (buf[0]) { |
|
|
head->read_avail = len; |
|
|
head->readbuf_size = head->read_avail; |
|
|
head->read_buf = buf; |
|
|
head->read_step++; |
|
|
} else { |
|
|
ccs_free(buf); |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* write_answer - Write the supervisor's decision. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns 0 on success, -EINVAL otherwise. |
|
|
*/ |
|
|
static int write_answer(struct ccs_io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
struct list_head *tmp; |
|
|
unsigned int serial; |
|
|
unsigned int answer; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr |
|
|
= list_entry(tmp, struct query_entry, list); |
|
|
ptr->timer = 0; |
|
|
} |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (sscanf(data, "A%u=%u", &serial, &answer) != 2) |
|
|
return -EINVAL; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_list_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr |
|
|
= list_entry(tmp, struct query_entry, list); |
|
|
if (ptr->serial != serial) |
|
|
continue; |
|
|
if (!ptr->answer) |
|
|
ptr->answer = answer; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&query_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* Policy updates counter. */ |
|
|
static unsigned int updates_counter[MAX_CCS_UPDATES_COUNTER]; |
|
|
|
|
|
/* Policy updates counter lock. */ |
|
|
static DEFINE_SPINLOCK(updates_counter_lock); |
|
|
|
|
|
/** |
|
|
* ccs_update_counter - Increment policy change counter. |
|
|
* |
|
|
* @index: Type of policy. |
|
|
* |
|
|
* Returns nothing. |
|
|
*/ |
|
|
void ccs_update_counter(const unsigned char index) |
|
|
{ |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&updates_counter_lock); |
|
|
if (index < MAX_CCS_UPDATES_COUNTER) |
|
|
updates_counter[index]++; |
|
|
spin_unlock(&updates_counter_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_updates_counter - Check for policy change counter. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns how many times policy has changed since the previous check. |
|
|
*/ |
|
|
static int read_updates_counter(struct ccs_io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
unsigned int counter[MAX_CCS_UPDATES_COUNTER]; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&updates_counter_lock); |
|
|
memmove(counter, updates_counter, sizeof(updates_counter)); |
|
|
memset(updates_counter, 0, sizeof(updates_counter)); |
|
|
spin_unlock(&updates_counter_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
ccs_io_printf(head, |
|
|
"/proc/ccs/system_policy: %10u\n" |
|
|
"/proc/ccs/domain_policy: %10u\n" |
|
|
"/proc/ccs/exception_policy: %10u\n" |
|
|
"/proc/ccs/profile: %10u\n" |
|
|
"/proc/ccs/query: %10u\n" |
|
|
"/proc/ccs/manager: %10u\n" |
|
|
"/proc/ccs/grant_log: %10u\n" |
|
|
"/proc/ccs/reject_log: %10u\n", |
|
|
counter[CCS_UPDATES_COUNTER_SYSTEM_POLICY], |
|
|
counter[CCS_UPDATES_COUNTER_DOMAIN_POLICY], |
|
|
counter[CCS_UPDATES_COUNTER_EXCEPTION_POLICY], |
|
|
counter[CCS_UPDATES_COUNTER_PROFILE], |
|
|
counter[CCS_UPDATES_COUNTER_QUERY], |
|
|
counter[CCS_UPDATES_COUNTER_MANAGER], |
|
|
counter[CCS_UPDATES_COUNTER_GRANT_LOG], |
|
|
counter[CCS_UPDATES_COUNTER_REJECT_LOG]); |
|
|
head->read_eof = true; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_version: Get version. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns version information. |
|
|
*/ |
|
|
static int read_version(struct ccs_io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
ccs_io_printf(head, "1.6.5-pre"); |
|
|
head->read_eof = true; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* read_self_domain - Get the current process's domainname. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns the current process's domainname. |
|
|
*/ |
|
|
static int read_self_domain(struct ccs_io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
/* |
|
|
* current->domain_info->domainname != NULL |
|
|
* because every process belongs to a domain and |
|
|
* the domain's name cannot be NULL. |
|
|
*/ |
|
|
ccs_io_printf(head, "%s", |
|
|
current->domain_info->domainname->name); |
|
|
head->read_eof = true; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_open_control - open() for /proc/ccs/ interface. |
|
|
* |
|
|
* @type: Type of interface. |
|
|
* @file: Pointer to "struct file". |
|
|
* |
|
|
* Associates policy handler and returns 0 on success, -ENOMEM otherwise. |
|
|
*/ |
|
|
int ccs_open_control(const u8 type, struct file *file) |
|
|
{ |
|
|
struct ccs_io_buffer *head = ccs_alloc(sizeof(*head)); |
|
|
if (!head) |
|
|
return -ENOMEM; |
|
|
mutex_init(&head->io_sem); |
|
|
switch (type) { |
|
|
#ifdef CONFIG_SAKURA |
|
|
case CCS_SYSTEMPOLICY: /* /proc/ccs/system_policy */ |
|
|
head->write = write_system_policy; |
|
|
head->read = read_system_policy; |
|
|
break; |
|
|
#endif |
|
|
#ifdef CONFIG_TOMOYO |
|
|
case CCS_DOMAINPOLICY: /* /proc/ccs/domain_policy */ |
|
|
head->write = write_domain_policy; |
|
|
head->read = read_domain_policy; |
|
|
break; |
|
|
case CCS_EXCEPTIONPOLICY: /* /proc/ccs/exception_policy */ |
|
|
head->write = write_exception_policy; |
|
|
head->read = read_exception_policy; |
|
|
break; |
|
|
case CCS_GRANTLOG: /* /proc/ccs/grant_log */ |
|
|
head->poll = ccs_poll_grant_log; |
|
|
head->read = ccs_read_grant_log; |
|
|
break; |
|
|
case CCS_REJECTLOG: /* /proc/ccs/reject_log */ |
|
|
head->poll = ccs_poll_reject_log; |
|
|
head->read = ccs_read_reject_log; |
|
|
break; |
|
|
#endif |
|
|
case CCS_SELFDOMAIN: /* /proc/ccs/self_domain */ |
|
|
head->read = read_self_domain; |
|
|
break; |
|
|
case CCS_DOMAIN_STATUS: /* /proc/ccs/.domain_status */ |
|
|
head->write = write_domain_profile; |
|
|
head->read = read_domain_profile; |
|
|
break; |
|
|
case CCS_PROCESS_STATUS: /* /proc/ccs/.process_status */ |
|
|
head->write = write_pid; |
|
|
head->read = read_pid; |
|
|
break; |
|
|
case CCS_VERSION: /* /proc/ccs/version */ |
|
|
head->read = read_version; |
|
|
head->readbuf_size = 128; |
|
|
break; |
|
|
case CCS_MEMINFO: /* /proc/ccs/meminfo */ |
|
|
head->write = ccs_write_memory_quota; |
|
|
head->read = ccs_read_memory_counter; |
|
|
head->readbuf_size = 512; |
|
|
break; |
|
|
case CCS_PROFILE: /* /proc/ccs/profile */ |
|
|
head->write = write_profile; |
|
|
head->read = read_profile; |
|
|
break; |
|
|
case CCS_QUERY: /* /proc/ccs/query */ |
|
|
head->poll = poll_query; |
|
|
head->write = write_answer; |
|
|
head->read = read_query; |
|
|
break; |
|
|
case CCS_MANAGER: /* /proc/ccs/manager */ |
|
|
head->write = write_manager_policy; |
|
|
head->read = read_manager_policy; |
|
|
break; |
|
|
case CCS_UPDATESCOUNTER: /* /proc/ccs/.updates_counter */ |
|
|
head->read = read_updates_counter; |
|
|
break; |
|
|
} |
|
|
if (!(file->f_mode & FMODE_READ)) { |
|
|
/* |
|
|
* No need to allocate read_buf since it is not opened |
|
|
* for reading. |
|
|
*/ |
|
|
head->read = NULL; |
|
|
head->poll = NULL; |
|
|
} else if (type != CCS_GRANTLOG && type != CCS_REJECTLOG |
|
|
&& type != CCS_QUERY) { |
|
|
/* |
|
|
* Don't allocate buffer for reading if the file is one of |
|
|
* /proc/ccs/grant_log , /proc/ccs/reject_log , /proc/ccs/query. |
|
|
*/ |
|
|
if (!head->readbuf_size) |
|
|
head->readbuf_size = 4096 * 2; |
|
|
head->read_buf = ccs_alloc(head->readbuf_size); |
|
|
if (!head->read_buf) { |
|
|
ccs_free(head); |
|
|
return -ENOMEM; |
|
|
} |
|
|
} |
|
|
if (!(file->f_mode & FMODE_WRITE)) { |
|
|
/* |
|
|
* No need to allocate write_buf since it is not opened |
|
|
* for writing. |
|
|
*/ |
|
|
head->write = NULL; |
|
|
} else if (head->write) { |
|
|
head->writebuf_size = 4096 * 2; |
|
|
head->write_buf = ccs_alloc(head->writebuf_size); |
|
|
if (!head->write_buf) { |
|
|
ccs_free(head->read_buf); |
|
|
ccs_free(head); |
|
|
return -ENOMEM; |
|
|
} |
|
|
} |
|
|
file->private_data = head; |
|
|
/* |
|
|
* Call the handler now if the file is /proc/ccs/self_domain |
|
|
* so that the user can use "cat < /proc/ccs/self_domain" to |
|
|
* know the current process's domainname. |
|
|
*/ |
|
|
if (type == CCS_SELFDOMAIN) |
|
|
ccs_read_control(file, NULL, 0); |
|
|
/* |
|
|
* If the file is /proc/ccs/query , increment the monitor count. |
|
|
* The monitor count is used by ccs_check_supervisor() to see if |
|
|
* there is some process monitoring /proc/ccs/query. |
|
|
*/ |
|
|
else if (head->write == write_answer || head->read == read_query) |
|
|
atomic_inc(&queryd_watcher); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_poll_control - poll() for /proc/ccs/ interface. |
|
|
* |
|
|
* @file: Pointer to "struct file". |
|
|
* @wait: Pointer to "poll_table". |
|
|
* |
|
|
* Waits for read readiness. |
|
|
* /proc/ccs/query is handled by /usr/lib/ccs/ccs-queryd and |
|
|
* /proc/ccs/grant_log and /proc/ccs/reject_log are handled by |
|
|
* /usr/lib/ccs/ccs-auditd. |
|
|
*/ |
|
|
int ccs_poll_control(struct file *file, poll_table *wait) |
|
|
{ |
|
|
struct ccs_io_buffer *head = file->private_data; |
|
|
if (!head->poll) |
|
|
return -ENOSYS; |
|
|
return head->poll(file, wait); |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_read_control - read() for /proc/ccs/ interface. |
|
|
* |
|
|
* @file: Pointer to "struct file". |
|
|
* @buffer: Poiner to buffer to write to. |
|
|
* @buffer_len: Size of @buffer. |
|
|
* |
|
|
* Returns bytes read on success, negative value otherwise. |
|
|
*/ |
|
|
int ccs_read_control(struct file *file, char __user *buffer, |
|
|
const int buffer_len) |
|
|
{ |
|
|
int len = 0; |
|
|
struct ccs_io_buffer *head = file->private_data; |
|
|
char *cp; |
|
|
if (!head->read) |
|
|
return -ENOSYS; |
|
|
if (!access_ok(VERIFY_WRITE, buffer, buffer_len)) |
|
|
return -EFAULT; |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
|
|
return -EINTR; |
|
|
/* Call the policy handler. */ |
|
|
len = head->read(head); |
|
|
if (len < 0) |
|
|
goto out; |
|
|
/* Write to buffer. */ |
|
|
len = head->read_avail; |
|
|
if (len > buffer_len) |
|
|
len = buffer_len; |
|
|
if (!len) |
|
|
goto out; |
|
|
/* head->read_buf changes by some functions. */ |
|
|
cp = head->read_buf; |
|
|
if (copy_to_user(buffer, cp, len)) { |
|
|
len = -EFAULT; |
|
|
goto out; |
|
|
} |
|
|
head->read_avail -= len; |
|
|
memmove(cp, cp + len, head->read_avail); |
|
|
out: |
|
|
mutex_unlock(&head->io_sem); |
|
|
return len; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_write_control - write() for /proc/ccs/ interface. |
|
|
* |
|
|
* @file: Pointer to "struct file". |
|
|
* @buffer: Pointer to buffer to read from. |
|
|
* @buffer_len: Size of @buffer. |
|
|
* |
|
|
* Returns @buffer_len on success, negative value otherwise. |
|
|
*/ |
|
|
int ccs_write_control(struct file *file, const char __user *buffer, |
|
|
const int buffer_len) |
|
|
{ |
|
|
struct ccs_io_buffer *head = file->private_data; |
|
|
int error = buffer_len; |
|
|
int avail_len = buffer_len; |
|
|
char *cp0 = head->write_buf; |
|
|
if (!head->write) |
|
|
return -ENOSYS; |
|
|
if (!access_ok(VERIFY_READ, buffer, buffer_len)) |
|
|
return -EFAULT; |
|
|
/* Don't allow updating policies by non manager programs. */ |
|
|
if (head->write != write_pid && |
|
|
#ifdef CONFIG_TOMOYO |
|
|
head->write != write_domain_policy && |
|
|
#endif |
|
|
!is_policy_manager()) |
|
|
return -EPERM; |
|
|
if (mutex_lock_interruptible(&head->io_sem)) |
|
|
return -EINTR; |
|
|
/* Read a line and dispatch it to the policy handler. */ |
|
|
while (avail_len > 0) { |
|
|
char c; |
|
|
if (head->write_avail >= head->writebuf_size - 1) { |
|
|
error = -ENOMEM; |
|
|
break; |
|
|
} else if (get_user(c, buffer)) { |
|
|
error = -EFAULT; |
|
|
break; |
|
|
} |
|
|
buffer++; |
|
|
avail_len--; |
|
|
cp0[head->write_avail++] = c; |
|
|
if (c != '\n') |
|
|
continue; |
|
|
cp0[head->write_avail - 1] = '\0'; |
|
|
head->write_avail = 0; |
|
|
normalize_line(cp0); |
|
|
head->write(head); |
|
|
} |
|
|
mutex_unlock(&head->io_sem); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_close_control - close() for /proc/ccs/ interface. |
|
|
* |
|
|
* @file: Pointer to "struct file". |
|
|
* |
|
|
* Releases memory and returns 0. |
|
|
*/ |
|
|
int ccs_close_control(struct file *file) |
|
|
{ |
|
|
struct ccs_io_buffer *head = file->private_data; |
|
|
/* |
|
|
* If the file is /proc/ccs/query , decrement the monitor count. |
|
|
*/ |
|
|
if (head->write == write_answer || head->read == read_query) |
|
|
atomic_dec(&queryd_watcher); |
|
|
/* Release memory used for policy I/O. */ |
|
|
ccs_free(head->read_buf); |
|
|
head->read_buf = NULL; |
|
|
ccs_free(head->write_buf); |
|
|
head->write_buf = NULL; |
|
|
ccs_free(head); |
|
|
head = NULL; |
|
|
file->private_data = NULL; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_alloc_acl_element - Allocate permanent memory for ACL entry. |
|
|
* |
|
|
* @acl_type: Type of ACL entry. |
|
|
* @condition: Pointer to condition part of the ACL entry. May be NULL. |
|
|
* |
|
|
* Returns pointer to the ACL entry on success, NULL otherwise. |
|
|
*/ |
|
|
void *ccs_alloc_acl_element(const u8 acl_type, |
|
|
const struct condition_list *condition) |
|
|
{ |
|
|
int len; |
|
|
struct acl_info *ptr; |
|
|
switch (acl_type) { |
|
|
case TYPE_SINGLE_PATH_ACL: |
|
|
len = sizeof(struct single_path_acl_record); |
|
|
break; |
|
|
case TYPE_DOUBLE_PATH_ACL: |
|
|
len = sizeof(struct double_path_acl_record); |
|
|
break; |
|
|
case TYPE_ARGV0_ACL: |
|
|
len = sizeof(struct argv0_acl_record); |
|
|
break; |
|
|
case TYPE_ENV_ACL: |
|
|
len = sizeof(struct env_acl_record); |
|
|
break; |
|
|
case TYPE_CAPABILITY_ACL: |
|
|
len = sizeof(struct capability_acl_record); |
|
|
break; |
|
|
case TYPE_IP_NETWORK_ACL: |
|
|
len = sizeof(struct ip_network_acl_record); |
|
|
break; |
|
|
case TYPE_SIGNAL_ACL: |
|
|
len = sizeof(struct signal_acl_record); |
|
|
break; |
|
|
case TYPE_EXECUTE_HANDLER: |
|
|
case TYPE_DENIED_EXECUTE_HANDLER: |
|
|
len = sizeof(struct execute_handler_record); |
|
|
break; |
|
|
default: |
|
|
return NULL; |
|
|
} |
|
|
/* |
|
|
* If the ACL doesn't have condition part, reduce memory usage |
|
|
* by eliminating sizeof(struct condition_list *). |
|
|
*/ |
|
|
if (!condition) |
|
|
len -= sizeof(ptr->access_me_via_ccs_get_condition_part); |
|
|
ptr = ccs_alloc_element(len); |
|
|
if (!ptr) |
|
|
return NULL; |
|
|
if (condition) { |
|
|
ptr->access_me_via_ccs_get_condition_part = condition; |
|
|
ptr->type = acl_type | ACL_WITH_CONDITION; |
|
|
return ptr; |
|
|
} |
|
|
/* |
|
|
* Substract sizeof(struct condition_list *) because I eliminated |
|
|
* sizeof(struct condition_list *) from "struct acl_info" |
|
|
* but I must return the start address of "struct acl_info". |
|
|
*/ |
|
|
ptr = (void *) (((u8 *) ptr) |
|
|
- sizeof(ptr->access_me_via_ccs_get_condition_part)); |
|
|
ptr->type = acl_type; |
|
|
return ptr; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_get_condition_part - Get condition part of the given ACL entry. |
|
|
* |
|
|
* @acl: Pointer to "struct acl_info". Pointer to an ACL entry. |
|
|
* |
|
|
* Returns pointer to the condition part if the ACL has it, NULL otherwise. |
|
|
*/ |
|
|
const struct condition_list *ccs_get_condition_part(const struct acl_info *acl) |
|
|
{ |
|
|
return (acl->type & ACL_WITH_CONDITION) ? |
|
|
acl->access_me_via_ccs_get_condition_part : NULL; |
|
|
} |
|