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 |
* |
* |
6 |
* Copyright (C) 2005-2007 NTT DATA CORPORATION |
* Version: 1.7.0-pre 2009/08/24 |
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* |
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* Version: 1.5.2-pre 2007/11/29 |
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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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13 |
#include <linux/string.h> |
#include "internal.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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#include <linux/version.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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14 |
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15 |
#ifdef CONFIG_TOMOYO_MAX_ACCEPT_ENTRY |
DEFINE_MUTEX(ccs_policy_lock); |
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#define MAX_ACCEPT_ENTRY (CONFIG_TOMOYO_MAX_ACCEPT_ENTRY) |
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#else |
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#define MAX_ACCEPT_ENTRY 2048 |
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#endif |
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#ifdef CONFIG_TOMOYO_MAX_GRANT_LOG |
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#define MAX_GRANT_LOG (CONFIG_TOMOYO_MAX_GRANT_LOG) |
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#else |
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#define MAX_GRANT_LOG 1024 |
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#endif |
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#ifdef CONFIG_TOMOYO_MAX_REJECT_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_REJECT_LOG 1024 |
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#endif |
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16 |
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17 |
/************************* VARIABLES *************************/ |
/* Has /sbin/init started? */ |
18 |
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bool ccs_policy_loaded; |
19 |
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20 |
/* /sbin/init started? */ |
/* Profile table. Memory is allocated as needed. */ |
21 |
int sbin_init_started = 0; |
struct ccs_profile *ccs_profile_ptr[CCS_MAX_PROFILES]; |
22 |
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23 |
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static const u8 ccs_index2category[CCS_MAX_MAC_INDEX + |
24 |
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CCS_MAX_CAPABILITY_INDEX] = { |
25 |
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[CCS_MAC_FILE_EXECUTE] = CCS_MAC_CATEGORY_FILE, |
26 |
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[CCS_MAC_FILE_OPEN] = CCS_MAC_CATEGORY_FILE, |
27 |
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[CCS_MAC_FILE_CREATE] = CCS_MAC_CATEGORY_FILE, |
28 |
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[CCS_MAC_FILE_UNLINK] = CCS_MAC_CATEGORY_FILE, |
29 |
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[CCS_MAC_FILE_MKDIR] = CCS_MAC_CATEGORY_FILE, |
30 |
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[CCS_MAC_FILE_RMDIR] = CCS_MAC_CATEGORY_FILE, |
31 |
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[CCS_MAC_FILE_MKFIFO] = CCS_MAC_CATEGORY_FILE, |
32 |
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[CCS_MAC_FILE_MKSOCK] = CCS_MAC_CATEGORY_FILE, |
33 |
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[CCS_MAC_FILE_TRUNCATE] = CCS_MAC_CATEGORY_FILE, |
34 |
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[CCS_MAC_FILE_SYMLINK] = CCS_MAC_CATEGORY_FILE, |
35 |
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[CCS_MAC_FILE_REWRITE] = CCS_MAC_CATEGORY_FILE, |
36 |
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[CCS_MAC_FILE_MKBLOCK] = CCS_MAC_CATEGORY_FILE, |
37 |
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[CCS_MAC_FILE_MKCHAR] = CCS_MAC_CATEGORY_FILE, |
38 |
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[CCS_MAC_FILE_LINK] = CCS_MAC_CATEGORY_FILE, |
39 |
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[CCS_MAC_FILE_RENAME] = CCS_MAC_CATEGORY_FILE, |
40 |
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[CCS_MAC_FILE_CHMOD] = CCS_MAC_CATEGORY_FILE, |
41 |
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[CCS_MAC_FILE_CHOWN] = CCS_MAC_CATEGORY_FILE, |
42 |
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[CCS_MAC_FILE_CHGRP] = CCS_MAC_CATEGORY_FILE, |
43 |
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[CCS_MAC_FILE_IOCTL] = CCS_MAC_CATEGORY_FILE, |
44 |
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[CCS_MAC_FILE_CHROOT] = CCS_MAC_CATEGORY_FILE, |
45 |
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[CCS_MAC_FILE_MOUNT] = CCS_MAC_CATEGORY_FILE, |
46 |
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[CCS_MAC_FILE_UMOUNT] = CCS_MAC_CATEGORY_FILE, |
47 |
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[CCS_MAC_FILE_PIVOT_ROOT] = CCS_MAC_CATEGORY_FILE, |
48 |
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[CCS_MAC_ENVIRON] = CCS_MAC_CATEGORY_MISC, |
49 |
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[CCS_MAC_NETWORK_UDP_BIND] = CCS_MAC_CATEGORY_NETWORK, |
50 |
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[CCS_MAC_NETWORK_UDP_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
51 |
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[CCS_MAC_NETWORK_TCP_BIND] = CCS_MAC_CATEGORY_NETWORK, |
52 |
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[CCS_MAC_NETWORK_TCP_LISTEN] = CCS_MAC_CATEGORY_NETWORK, |
53 |
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[CCS_MAC_NETWORK_TCP_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
54 |
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[CCS_MAC_NETWORK_TCP_ACCEPT] = CCS_MAC_CATEGORY_NETWORK, |
55 |
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[CCS_MAC_NETWORK_RAW_BIND] = CCS_MAC_CATEGORY_NETWORK, |
56 |
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[CCS_MAC_NETWORK_RAW_CONNECT] = CCS_MAC_CATEGORY_NETWORK, |
57 |
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[CCS_MAC_SIGNAL] = CCS_MAC_CATEGORY_IPC, |
58 |
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[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CREATE] |
59 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
60 |
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[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_LISTEN] |
61 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
62 |
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[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CONNECT] |
63 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
64 |
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[CCS_MAX_MAC_INDEX + CCS_USE_INET_DGRAM_SOCKET] |
65 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
66 |
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[CCS_MAX_MAC_INDEX + CCS_USE_INET_RAW_SOCKET] |
67 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
68 |
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[CCS_MAX_MAC_INDEX + CCS_USE_ROUTE_SOCKET] |
69 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
70 |
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[CCS_MAX_MAC_INDEX + CCS_USE_PACKET_SOCKET] |
71 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
72 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_MOUNT] |
73 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
74 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_UMOUNT] |
75 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
76 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_REBOOT] |
77 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
78 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_CHROOT] |
79 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
80 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_KILL] |
81 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
82 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_VHANGUP] |
83 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
84 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_SETTIME] |
85 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
86 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_NICE] |
87 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
88 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_SETHOSTNAME] |
89 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
90 |
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[CCS_MAX_MAC_INDEX + CCS_USE_KERNEL_MODULE] |
91 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
92 |
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[CCS_MAX_MAC_INDEX + CCS_CREATE_FIFO] |
93 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
94 |
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[CCS_MAX_MAC_INDEX + CCS_CREATE_BLOCK_DEV] |
95 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
96 |
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[CCS_MAX_MAC_INDEX + CCS_CREATE_CHAR_DEV] |
97 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
98 |
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[CCS_MAX_MAC_INDEX + CCS_CREATE_UNIX_SOCKET] |
99 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
100 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_LINK] |
101 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
102 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_SYMLINK] |
103 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
104 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_RENAME] |
105 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
106 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_UNLINK] |
107 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
108 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_CHMOD] |
109 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
110 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_CHOWN] |
111 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
112 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_IOCTL] |
113 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
114 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_KEXEC_LOAD] |
115 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
116 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_PIVOT_ROOT] |
117 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
118 |
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[CCS_MAX_MAC_INDEX + CCS_SYS_PTRACE] |
119 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
120 |
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[CCS_MAX_MAC_INDEX + CCS_CONCEAL_MOUNT] |
121 |
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= CCS_MAC_CATEGORY_CAPABILITY, |
122 |
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}; |
123 |
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124 |
const char *ccs_log_level = KERN_DEBUG; |
/* Utility functions. */ |
125 |
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126 |
static struct { |
/** |
127 |
const char *keyword; |
* ccs_parse_ulong - Parse an "unsigned long" value. |
128 |
unsigned int current_value; |
* |
129 |
const unsigned int max_value; |
* @result: Pointer to "unsigned long". |
130 |
} ccs_control_array[CCS_MAX_CONTROL_INDEX] = { |
* @str: Pointer to string to parse. |
131 |
[CCS_PROFILE_COMMENT] = { "COMMENT", 0, 0 }, /* Reserved for string. */ |
* |
132 |
[CCS_TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, |
* Returns value type on success, 0 otherwise. |
133 |
[CCS_TOMOYO_MAC_FOR_ARGV0] = { "MAC_FOR_ARGV0", 0, 3 }, |
* |
134 |
[CCS_TOMOYO_MAC_FOR_ENV] = { "MAC_FOR_ENV", 0, 3 }, |
* The @src is updated to point the first character after the value |
135 |
[CCS_TOMOYO_MAC_FOR_NETWORK] = { "MAC_FOR_NETWORK", 0, 3 }, |
* on success. |
136 |
[CCS_TOMOYO_MAC_FOR_SIGNAL] = { "MAC_FOR_SIGNAL", 0, 3 }, |
*/ |
137 |
[CCS_SAKURA_DENY_CONCEAL_MOUNT] = { "DENY_CONCEAL_MOUNT", 0, 3 }, |
u8 ccs_parse_ulong(unsigned long *result, char **str) |
138 |
[CCS_SAKURA_RESTRICT_CHROOT] = { "RESTRICT_CHROOT", 0, 3 }, |
{ |
139 |
[CCS_SAKURA_RESTRICT_MOUNT] = { "RESTRICT_MOUNT", 0, 3 }, |
const char *cp = *str; |
140 |
[CCS_SAKURA_RESTRICT_UNMOUNT] = { "RESTRICT_UNMOUNT", 0, 3 }, |
char *ep; |
141 |
[CCS_SAKURA_RESTRICT_PIVOT_ROOT] = { "RESTRICT_PIVOT_ROOT", 0, 3 }, |
int base = 10; |
142 |
[CCS_SAKURA_RESTRICT_AUTOBIND] = { "RESTRICT_AUTOBIND", 0, 1 }, |
if (*cp == '0') { |
143 |
[CCS_TOMOYO_MAX_ACCEPT_ENTRY] = { "MAX_ACCEPT_ENTRY", MAX_ACCEPT_ENTRY, INT_MAX }, |
char c = *(cp + 1); |
144 |
[CCS_TOMOYO_MAX_GRANT_LOG] = { "MAX_GRANT_LOG", MAX_GRANT_LOG, INT_MAX }, |
if (c == 'x' || c == 'X') { |
145 |
[CCS_TOMOYO_MAX_REJECT_LOG] = { "MAX_REJECT_LOG", MAX_REJECT_LOG, INT_MAX }, |
base = 16; |
146 |
[CCS_TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, |
cp += 2; |
147 |
[CCS_ALLOW_ENFORCE_GRACE] = { "ALLOW_ENFORCE_GRACE", 0, 1 }, |
} else if (c >= '0' && c <= '7') { |
148 |
[CCS_SLEEP_PERIOD] = { "SLEEP_PERIOD", 0, 3000 }, /* in 0.1 second */ |
base = 8; |
149 |
[CCS_TOMOYO_ALT_EXEC] = { "ALT_EXEC", 0, 0 }, /* Reserved for string. */ |
cp++; |
150 |
}; |
} |
151 |
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} |
152 |
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*result = simple_strtoul(cp, &ep, base); |
153 |
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if (cp == ep) |
154 |
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return 0; |
155 |
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*str = ep; |
156 |
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switch (base) { |
157 |
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case 16: |
158 |
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return CCS_VALUE_TYPE_HEXADECIMAL; |
159 |
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case 8: |
160 |
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return CCS_VALUE_TYPE_OCTAL; |
161 |
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default: |
162 |
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return CCS_VALUE_TYPE_DECIMAL; |
163 |
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} |
164 |
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} |
165 |
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166 |
struct profile { |
/** |
167 |
unsigned int value[CCS_MAX_CONTROL_INDEX]; |
* ccs_print_ulong - Print an "unsigned long" value. |
168 |
const struct path_info *comment; |
* |
169 |
const struct path_info *alt_exec; |
* @buffer: Pointer to buffer. |
170 |
}; |
* @buffer_len: Size of @buffer. |
171 |
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* @value: An "unsigned long" value. |
172 |
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* @type: Type of @value. |
173 |
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* |
174 |
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* Returns nothing. |
175 |
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*/ |
176 |
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void ccs_print_ulong(char *buffer, const int buffer_len, |
177 |
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const unsigned long value, const u8 type) |
178 |
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{ |
179 |
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if (type == CCS_VALUE_TYPE_DECIMAL) |
180 |
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snprintf(buffer, buffer_len, "%lu", value); |
181 |
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else if (type == CCS_VALUE_TYPE_OCTAL) |
182 |
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snprintf(buffer, buffer_len, "0%lo", value); |
183 |
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else if (type == CCS_VALUE_TYPE_HEXADECIMAL) |
184 |
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snprintf(buffer, buffer_len, "0x%lX", value); |
185 |
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else |
186 |
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snprintf(buffer, buffer_len, "type(%u)", type); |
187 |
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} |
188 |
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189 |
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bool ccs_parse_name_union(const char *filename, struct ccs_name_union *ptr) |
190 |
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{ |
191 |
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if (!ccs_is_correct_path(filename, 0, 0, 0)) |
192 |
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return false; |
193 |
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if (filename[0] == '@') { |
194 |
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ptr->group = ccs_get_path_group(filename + 1); |
195 |
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ptr->is_group = true; |
196 |
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return ptr->group != NULL; |
197 |
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} |
198 |
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ptr->filename = ccs_get_name(filename); |
199 |
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ptr->is_group = false; |
200 |
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return ptr->filename != NULL; |
201 |
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} |
202 |
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203 |
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bool ccs_parse_number_union(char *data, struct ccs_number_union *num) |
204 |
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{ |
205 |
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u8 type; |
206 |
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unsigned long v; |
207 |
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memset(num, 0, sizeof(*num)); |
208 |
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if (data[0] == '@') { |
209 |
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if (!ccs_is_correct_path(data, 0, 0, 0)) |
210 |
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return false; |
211 |
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num->group = ccs_get_number_group(data + 1); |
212 |
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num->is_group = true; |
213 |
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return num->group != NULL; |
214 |
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} |
215 |
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type = ccs_parse_ulong(&v, &data); |
216 |
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if (!type) |
217 |
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return false; |
218 |
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num->values[0] = v; |
219 |
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num->min_type = type; |
220 |
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if (!*data) { |
221 |
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num->values[1] = v; |
222 |
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num->max_type = type; |
223 |
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return true; |
224 |
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} |
225 |
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if (*data++ != '-') |
226 |
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return false; |
227 |
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type = ccs_parse_ulong(&v, &data); |
228 |
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if (!type || *data) |
229 |
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return false; |
230 |
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num->values[1] = v; |
231 |
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num->max_type = type; |
232 |
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return true; |
233 |
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} |
234 |
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235 |
static struct profile *profile_ptr[MAX_PROFILES]; |
/** |
236 |
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* ccs_is_byte_range - Check whether the string isa \ooo style octal value. |
237 |
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* |
238 |
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* @str: Pointer to the string. |
239 |
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* |
240 |
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* Returns true if @str is a \ooo style octal value, false otherwise. |
241 |
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*/ |
242 |
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static inline bool ccs_is_byte_range(const char *str) |
243 |
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{ |
244 |
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return *str >= '0' && *str++ <= '3' && |
245 |
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*str >= '0' && *str++ <= '7' && |
246 |
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*str >= '0' && *str <= '7'; |
247 |
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} |
248 |
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249 |
/************************* UTILITY FUNCTIONS *************************/ |
/** |
250 |
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* ccs_is_decimal - Check whether the character is a decimal character. |
251 |
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* |
252 |
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* @c: The character to check. |
253 |
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* |
254 |
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* Returns true if @c is a decimal character, false otherwise. |
255 |
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*/ |
256 |
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static inline bool ccs_is_decimal(const char c) |
257 |
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{ |
258 |
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return c >= '0' && c <= '9'; |
259 |
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} |
260 |
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261 |
#ifdef CONFIG_TOMOYO |
/** |
262 |
static int __init TOMOYO_Quiet_Setup(char *str) |
* ccs_is_hexadecimal - Check whether the character is a hexadecimal character. |
263 |
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* |
264 |
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* @c: The character to check. |
265 |
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* |
266 |
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* Returns true if @c is a hexadecimal character, false otherwise. |
267 |
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*/ |
268 |
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static inline bool ccs_is_hexadecimal(const char c) |
269 |
{ |
{ |
270 |
ccs_control_array[CCS_TOMOYO_VERBOSE].current_value = 0; |
return (c >= '0' && c <= '9') || |
271 |
return 0; |
(c >= 'A' && c <= 'F') || |
272 |
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(c >= 'a' && c <= 'f'); |
273 |
} |
} |
274 |
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|
275 |
__setup("TOMOYO_QUIET", TOMOYO_Quiet_Setup); |
/** |
276 |
#endif |
* ccs_is_alphabet_char - Check whether the character is an alphabet. |
277 |
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* |
278 |
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* @c: The character to check. |
279 |
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* |
280 |
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* Returns true if @c is an alphabet character, false otherwise. |
281 |
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*/ |
282 |
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static inline bool ccs_is_alphabet_char(const char c) |
283 |
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{ |
284 |
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return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); |
285 |
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} |
286 |
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|
287 |
/* Am I root? */ |
/** |
288 |
static int isRoot(void) |
* ccs_make_byte - Make byte value from three octal characters. |
289 |
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* |
290 |
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* @c1: The first character. |
291 |
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* @c2: The second character. |
292 |
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* @c3: The third character. |
293 |
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* |
294 |
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* Returns byte value. |
295 |
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*/ |
296 |
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static inline u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3) |
297 |
{ |
{ |
298 |
return !current->uid && !current->euid; |
return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); |
299 |
} |
} |
300 |
|
|
301 |
/* |
/** |
302 |
* Format string. |
* ccs_str_starts - Check whether the given string starts with the given keyword. |
303 |
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* |
304 |
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* @src: Pointer to pointer to the string. |
305 |
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* @find: Pointer to the keyword. |
306 |
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* |
307 |
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* Returns true if @src starts with @find, false otherwise. |
308 |
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* |
309 |
|
* The @src is updated to point the first character after the @find |
310 |
|
* if @src starts with @find. |
311 |
|
*/ |
312 |
|
bool ccs_str_starts(char **src, const char *find) |
313 |
|
{ |
314 |
|
const int len = strlen(find); |
315 |
|
char *tmp = *src; |
316 |
|
if (strncmp(tmp, find, len)) |
317 |
|
return false; |
318 |
|
tmp += len; |
319 |
|
*src = tmp; |
320 |
|
return true; |
321 |
|
} |
322 |
|
|
323 |
|
/** |
324 |
|
* ccs_normalize_line - Format string. |
325 |
|
* |
326 |
|
* @buffer: The line to normalize. |
327 |
|
* |
328 |
* Leading and trailing whitespaces are removed. |
* Leading and trailing whitespaces are removed. |
329 |
* Multiple whitespaces are packed into single space. |
* Multiple whitespaces are packed into single space. |
330 |
|
* |
331 |
|
* Returns nothing. |
332 |
*/ |
*/ |
333 |
static void NormalizeLine(unsigned char *buffer) |
void ccs_normalize_line(unsigned char *buffer) |
334 |
{ |
{ |
335 |
unsigned char *sp = buffer, *dp = buffer; |
unsigned char *sp = buffer; |
336 |
int first = 1; |
unsigned char *dp = buffer; |
337 |
while (*sp && (*sp <= ' ' || *sp >= 127)) sp++; |
bool first = true; |
338 |
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
339 |
|
sp++; |
340 |
while (*sp) { |
while (*sp) { |
341 |
if (!first) *dp++ = ' '; |
if (!first) |
342 |
first = 0; |
*dp++ = ' '; |
343 |
while (*sp > ' ' && *sp < 127) *dp++ = *sp++; |
first = false; |
344 |
while (*sp && (*sp <= ' ' || *sp >= 127)) sp++; |
while (*sp > ' ' && *sp < 127) |
345 |
|
*dp++ = *sp++; |
346 |
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
347 |
|
sp++; |
348 |
} |
} |
349 |
*dp = '\0'; |
*dp = '\0'; |
350 |
} |
} |
351 |
|
|
352 |
/* |
/** |
353 |
* Check whether the given filename follows the naming rules. |
* ccs_tokenize - Tokenize string. |
354 |
* Returns nonzero if follows, zero otherwise. |
* |
355 |
|
* @buffer: The line to tokenize. |
356 |
|
* @w: Pointer to "char *". |
357 |
|
* @size: Sizeof @w . |
358 |
|
* |
359 |
|
* Returns true on success, false otherwise. |
360 |
*/ |
*/ |
361 |
bool IsCorrectPath(const char *filename, const int start_type, const int pattern_type, const int end_type, const char *function) |
bool ccs_tokenize(char *buffer, char *w[], size_t size) |
362 |
{ |
{ |
363 |
int contains_pattern = 0; |
int count = size / sizeof(char *); |
364 |
char c, d, e; |
int i; |
365 |
|
for (i = 0; i < count; i++) |
366 |
|
w[i] = ""; |
367 |
|
for (i = 0; i < count; i++) { |
368 |
|
char *cp = strchr(buffer, ' '); |
369 |
|
if (cp) |
370 |
|
*cp = '\0'; |
371 |
|
w[i] = buffer; |
372 |
|
if (!cp) |
373 |
|
break; |
374 |
|
buffer = cp + 1; |
375 |
|
} |
376 |
|
return i < count || !*buffer; |
377 |
|
} |
378 |
|
|
379 |
|
/** |
380 |
|
* ccs_is_correct_path - Validate a pathname. |
381 |
|
* @filename: The pathname to check. |
382 |
|
* @start_type: Should the pathname start with '/'? |
383 |
|
* 1 = must / -1 = must not / 0 = don't care |
384 |
|
* @pattern_type: Can the pathname contain a wildcard? |
385 |
|
* 1 = must / -1 = must not / 0 = don't care |
386 |
|
* @end_type: Should the pathname end with '/'? |
387 |
|
* 1 = must / -1 = must not / 0 = don't care |
388 |
|
* |
389 |
|
* Check whether the given filename follows the naming rules. |
390 |
|
* Returns true if @filename follows the naming rules, false otherwise. |
391 |
|
*/ |
392 |
|
bool ccs_is_correct_path(const char *filename, const s8 start_type, |
393 |
|
const s8 pattern_type, const s8 end_type) |
394 |
|
{ |
395 |
|
bool contains_pattern = false; |
396 |
|
unsigned char c; |
397 |
|
unsigned char d; |
398 |
|
unsigned char e; |
399 |
const char *original_filename = filename; |
const char *original_filename = filename; |
400 |
if (!filename) goto out; |
if (!filename) |
401 |
|
goto out; |
402 |
c = *filename; |
c = *filename; |
403 |
if (start_type == 1) { /* Must start with '/' */ |
if (start_type == 1) { /* Must start with '/' */ |
404 |
if (c != '/') goto out; |
if (c != '/') |
405 |
|
goto out; |
406 |
} else if (start_type == -1) { /* Must not start with '/' */ |
} else if (start_type == -1) { /* Must not start with '/' */ |
407 |
if (c == '/') goto out; |
if (c == '/') |
408 |
|
goto out; |
409 |
} |
} |
410 |
if (c) c = * (strchr(filename, '\0') - 1); |
if (c) |
411 |
|
c = *(filename + strlen(filename) - 1); |
412 |
if (end_type == 1) { /* Must end with '/' */ |
if (end_type == 1) { /* Must end with '/' */ |
413 |
if (c != '/') goto out; |
if (c != '/') |
414 |
|
goto out; |
415 |
} else if (end_type == -1) { /* Must not end with '/' */ |
} else if (end_type == -1) { /* Must not end with '/' */ |
416 |
if (c == '/') goto out; |
if (c == '/') |
417 |
|
goto out; |
418 |
} |
} |
419 |
while ((c = *filename++) != '\0') { |
while (1) { |
420 |
|
c = *filename++; |
421 |
|
if (!c) |
422 |
|
break; |
423 |
if (c == '\\') { |
if (c == '\\') { |
424 |
switch ((c = *filename++)) { |
c = *filename++; |
425 |
|
switch (c) { |
426 |
case '\\': /* "\\" */ |
case '\\': /* "\\" */ |
427 |
continue; |
continue; |
428 |
case '$': /* "\$" */ |
case '$': /* "\$" */ |
435 |
case 'a': /* "\a" */ |
case 'a': /* "\a" */ |
436 |
case 'A': /* "\A" */ |
case 'A': /* "\A" */ |
437 |
case '-': /* "\-" */ |
case '-': /* "\-" */ |
438 |
if (pattern_type == -1) break; /* Must not contain pattern */ |
if (pattern_type == -1) |
439 |
contains_pattern = 1; |
break; /* Must not contain pattern */ |
440 |
|
contains_pattern = true; |
441 |
continue; |
continue; |
442 |
case '0': /* "\ooo" */ |
case '0': /* "\ooo" */ |
443 |
case '1': |
case '1': |
444 |
case '2': |
case '2': |
445 |
case '3': |
case '3': |
446 |
if ((d = *filename++) >= '0' && d <= '7' && (e = *filename++) >= '0' && e <= '7') { |
d = *filename++; |
447 |
const unsigned char f = |
if (d < '0' || d > '7') |
448 |
(((unsigned char) (c - '0')) << 6) + |
break; |
449 |
(((unsigned char) (d - '0')) << 3) + |
e = *filename++; |
450 |
(((unsigned char) (e - '0'))); |
if (e < '0' || e > '7') |
451 |
if (f && (f <= ' ' || f >= 127)) continue; /* pattern is not \000 */ |
break; |
452 |
} |
c = ccs_make_byte(c, d, e); |
453 |
|
if (c && (c <= ' ' || c >= 127)) |
454 |
|
continue; /* pattern is not \000 */ |
455 |
} |
} |
456 |
goto out; |
goto out; |
457 |
} else if (c <= ' ' || c >= 127) { |
} else if (c <= ' ' || c >= 127) { |
459 |
} |
} |
460 |
} |
} |
461 |
if (pattern_type == 1) { /* Must contain pattern */ |
if (pattern_type == 1) { /* Must contain pattern */ |
462 |
if (!contains_pattern) goto out; |
if (!contains_pattern) |
463 |
|
goto out; |
464 |
} |
} |
465 |
return 1; |
return true; |
466 |
out: |
out: |
467 |
printk(KERN_DEBUG "%s: Invalid pathname '%s'\n", function, original_filename); |
return false; |
|
return 0; |
|
468 |
} |
} |
469 |
|
|
470 |
/* |
/** |
471 |
* Check whether the given domainname follows the naming rules. |
* ccs_is_correct_domain - Check whether the given domainname follows the naming rules. |
472 |
* Returns nonzero if follows, zero otherwise. |
* @domainname: The domainname to check. |
473 |
|
* |
474 |
|
* Returns true if @domainname follows the naming rules, false otherwise. |
475 |
*/ |
*/ |
476 |
bool IsCorrectDomain(const unsigned char *domainname, const char *function) |
bool ccs_is_correct_domain(const unsigned char *domainname) |
477 |
{ |
{ |
478 |
unsigned char c, d, e; |
unsigned char c; |
479 |
|
unsigned char d; |
480 |
|
unsigned char e; |
481 |
const char *org_domainname = domainname; |
const char *org_domainname = domainname; |
482 |
if (!domainname || strncmp(domainname, ROOT_NAME, ROOT_NAME_LEN)) goto out; |
if (!domainname || strncmp(domainname, ROOT_NAME, ROOT_NAME_LEN)) |
483 |
|
goto out; |
484 |
domainname += ROOT_NAME_LEN; |
domainname += ROOT_NAME_LEN; |
485 |
if (!*domainname) return 1; |
if (!*domainname) |
486 |
|
return true; |
487 |
do { |
do { |
488 |
if (*domainname++ != ' ') goto out; |
if (*domainname++ != ' ') |
489 |
if (*domainname++ != '/') goto out; |
goto out; |
490 |
while ((c = *domainname) != '\0' && c != ' ') { |
if (*domainname++ != '/') |
491 |
|
goto out; |
492 |
|
while (1) { |
493 |
|
c = *domainname; |
494 |
|
if (!c || c == ' ') |
495 |
|
break; |
496 |
domainname++; |
domainname++; |
497 |
if (c == '\\') { |
if (c == '\\') { |
498 |
switch ((c = *domainname++)) { |
c = *domainname++; |
499 |
|
switch ((c)) { |
500 |
case '\\': /* "\\" */ |
case '\\': /* "\\" */ |
501 |
continue; |
continue; |
502 |
case '0': /* "\ooo" */ |
case '0': /* "\ooo" */ |
503 |
case '1': |
case '1': |
504 |
case '2': |
case '2': |
505 |
case '3': |
case '3': |
506 |
if ((d = *domainname++) >= '0' && d <= '7' && (e = *domainname++) >= '0' && e <= '7') { |
d = *domainname++; |
507 |
const unsigned char f = |
if (d < '0' || d > '7') |
508 |
(((unsigned char) (c - '0')) << 6) + |
break; |
509 |
(((unsigned char) (d - '0')) << 3) + |
e = *domainname++; |
510 |
(((unsigned char) (e - '0'))); |
if (e < '0' || e > '7') |
511 |
if (f && (f <= ' ' || f >= 127)) continue; /* pattern is not \000 */ |
break; |
512 |
} |
c = ccs_make_byte(c, d, e); |
513 |
|
if (c && (c <= ' ' || c >= 127)) |
514 |
|
/* pattern is not \000 */ |
515 |
|
continue; |
516 |
} |
} |
517 |
goto out; |
goto out; |
518 |
} else if (c < ' ' || c >= 127) { |
} else if (c < ' ' || c >= 127) { |
520 |
} |
} |
521 |
} |
} |
522 |
} while (*domainname); |
} while (*domainname); |
523 |
return 1; |
return true; |
524 |
out: |
out: |
525 |
printk(KERN_DEBUG "%s: Invalid domainname '%s'\n", function, org_domainname); |
return false; |
|
return 0; |
|
526 |
} |
} |
527 |
|
|
528 |
bool IsDomainDef(const unsigned char *buffer) |
/** |
529 |
|
* ccs_is_domain_def - Check whether the given token can be a domainname. |
530 |
|
* |
531 |
|
* @buffer: The token to check. |
532 |
|
* |
533 |
|
* Returns true if @buffer possibly be a domainname, false otherwise. |
534 |
|
*/ |
535 |
|
bool ccs_is_domain_def(const unsigned char *buffer) |
536 |
{ |
{ |
537 |
/* while (*buffer && (*buffer <= ' ' || *buffer >= 127)) buffer++; */ |
return !strncmp(buffer, ROOT_NAME, ROOT_NAME_LEN); |
|
return strncmp(buffer, ROOT_NAME, ROOT_NAME_LEN) == 0; |
|
538 |
} |
} |
539 |
|
|
540 |
struct domain_info *FindDomain(const char *domainname0) |
/** |
541 |
|
* ccs_find_domain - Find a domain by the given name. |
542 |
|
* |
543 |
|
* @domainname: The domainname to find. |
544 |
|
* |
545 |
|
* Returns pointer to "struct ccs_domain_info" if found, NULL otherwise. |
546 |
|
* |
547 |
|
* Caller holds ccs_read_lock(). |
548 |
|
*/ |
549 |
|
struct ccs_domain_info *ccs_find_domain(const char *domainname) |
550 |
{ |
{ |
551 |
struct domain_info *domain; |
struct ccs_domain_info *domain; |
552 |
struct path_info domainname; |
struct ccs_path_info name; |
553 |
domainname.name = domainname0; |
ccs_assert_read_lock(); |
554 |
fill_path_info(&domainname); |
name.name = domainname; |
555 |
list1_for_each_entry(domain, &domain_list, list) { |
ccs_fill_path_info(&name); |
556 |
if (!domain->is_deleted && !pathcmp(&domainname, domain->domainname)) return domain; |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
557 |
|
if (!domain->is_deleted && |
558 |
|
!ccs_pathcmp(&name, domain->domainname)) |
559 |
|
return domain; |
560 |
} |
} |
561 |
return NULL; |
return NULL; |
562 |
} |
} |
563 |
|
|
564 |
static int PathDepth(const char *pathname) |
/** |
565 |
|
* ccs_path_depth - Evaluate the number of '/' in a string. |
566 |
|
* |
567 |
|
* @pathname: The string to evaluate. |
568 |
|
* |
569 |
|
* Returns path depth of the string. |
570 |
|
* |
571 |
|
* I score 2 for each of the '/' in the @pathname |
572 |
|
* and score 1 if the @pathname ends with '/'. |
573 |
|
*/ |
574 |
|
static int ccs_path_depth(const char *pathname) |
575 |
{ |
{ |
576 |
int i = 0; |
int i = 0; |
577 |
if (pathname) { |
if (pathname) { |
578 |
char *ep = strchr(pathname, '\0'); |
const char *ep = pathname + strlen(pathname); |
579 |
if (pathname < ep--) { |
if (pathname < ep--) { |
580 |
if (*ep != '/') i++; |
if (*ep != '/') |
581 |
while (pathname <= ep) if (*ep-- == '/') i += 2; |
i++; |
582 |
|
while (pathname <= ep) |
583 |
|
if (*ep-- == '/') |
584 |
|
i += 2; |
585 |
} |
} |
586 |
} |
} |
587 |
return i; |
return i; |
588 |
} |
} |
589 |
|
|
590 |
static int const_part_length(const char *filename) |
/** |
591 |
|
* ccs_const_part_length - Evaluate the initial length without a pattern in a token. |
592 |
|
* |
593 |
|
* @filename: The string to evaluate. |
594 |
|
* |
595 |
|
* Returns the initial length without a pattern in @filename. |
596 |
|
*/ |
597 |
|
static int ccs_const_part_length(const char *filename) |
598 |
{ |
{ |
599 |
|
char c; |
600 |
int len = 0; |
int len = 0; |
601 |
if (filename) { |
if (!filename) |
602 |
char c; |
return 0; |
603 |
while ((c = *filename++) != '\0') { |
while (1) { |
604 |
if (c != '\\') { len++; continue; } |
c = *filename++; |
605 |
switch (c = *filename++) { |
if (!c) |
|
case '\\': /* "\\" */ |
|
|
len += 2; continue; |
|
|
case '0': /* "\ooo" */ |
|
|
case '1': |
|
|
case '2': |
|
|
case '3': |
|
|
if ((c = *filename++) >= '0' && c <= '7' && (c = *filename++) >= '0' && c <= '7') { len += 4; continue; } |
|
|
} |
|
606 |
break; |
break; |
607 |
|
if (c != '\\') { |
608 |
|
len++; |
609 |
|
continue; |
610 |
|
} |
611 |
|
c = *filename++; |
612 |
|
switch (c) { |
613 |
|
case '\\': /* "\\" */ |
614 |
|
len += 2; |
615 |
|
continue; |
616 |
|
case '0': /* "\ooo" */ |
617 |
|
case '1': |
618 |
|
case '2': |
619 |
|
case '3': |
620 |
|
c = *filename++; |
621 |
|
if (c < '0' || c > '7') |
622 |
|
break; |
623 |
|
c = *filename++; |
624 |
|
if (c < '0' || c > '7') |
625 |
|
break; |
626 |
|
len += 4; |
627 |
|
continue; |
628 |
} |
} |
629 |
|
break; |
630 |
} |
} |
631 |
return len; |
return len; |
632 |
} |
} |
633 |
|
|
634 |
void fill_path_info(struct path_info *ptr) |
/** |
635 |
|
* ccs_fill_path_info - Fill in "struct ccs_path_info" members. |
636 |
|
* |
637 |
|
* @ptr: Pointer to "struct ccs_path_info" to fill in. |
638 |
|
* |
639 |
|
* The caller sets "struct ccs_path_info"->name. |
640 |
|
*/ |
641 |
|
void ccs_fill_path_info(struct ccs_path_info *ptr) |
642 |
{ |
{ |
643 |
const char *name = ptr->name; |
const char *name = ptr->name; |
644 |
const int len = strlen(name); |
const int len = strlen(name); |
645 |
ptr->total_len = len; |
ptr->total_len = len; |
646 |
ptr->const_len = const_part_length(name); |
ptr->const_len = ccs_const_part_length(name); |
647 |
ptr->is_dir = len && (name[len - 1] == '/'); |
ptr->is_dir = len && (name[len - 1] == '/'); |
648 |
ptr->is_patterned = (ptr->const_len < len); |
ptr->is_patterned = (ptr->const_len < len); |
649 |
ptr->hash = full_name_hash(name, len); |
ptr->hash = full_name_hash(name, len); |
650 |
ptr->depth = PathDepth(name); |
ptr->depth = ccs_path_depth(name); |
651 |
} |
} |
652 |
|
|
653 |
static int FileMatchesToPattern2(const char *filename, const char *filename_end, const char *pattern, const char *pattern_end) |
/** |
654 |
|
* ccs_file_matches_pattern2 - Pattern matching without '/' character |
655 |
|
* and "\-" pattern. |
656 |
|
* |
657 |
|
* @filename: The start of string to check. |
658 |
|
* @filename_end: The end of string to check. |
659 |
|
* @pattern: The start of pattern to compare. |
660 |
|
* @pattern_end: The end of pattern to compare. |
661 |
|
* |
662 |
|
* Returns true if @filename matches @pattern, false otherwise. |
663 |
|
*/ |
664 |
|
static bool ccs_file_matches_pattern2(const char *filename, |
665 |
|
const char *filename_end, |
666 |
|
const char *pattern, |
667 |
|
const char *pattern_end) |
668 |
{ |
{ |
669 |
while (filename < filename_end && pattern < pattern_end) { |
while (filename < filename_end && pattern < pattern_end) { |
670 |
|
char c; |
671 |
if (*pattern != '\\') { |
if (*pattern != '\\') { |
672 |
if (*filename++ != *pattern++) return 0; |
if (*filename++ != *pattern++) |
673 |
} else { |
return false; |
674 |
char c = *filename; |
continue; |
675 |
pattern++; |
} |
676 |
switch (*pattern) { |
c = *filename; |
677 |
case '?': |
pattern++; |
678 |
if (c == '/') { |
switch (*pattern) { |
679 |
return 0; |
int i; |
680 |
} else if (c == '\\') { |
int j; |
681 |
if ((c = filename[1]) == '\\') { |
case '?': |
682 |
filename++; /* safe because filename is \\ */ |
if (c == '/') { |
683 |
} else if (c >= '0' && c <= '3' && (c = filename[2]) >= '0' && c <= '7' && (c = filename[3]) >= '0' && c <= '7') { |
return false; |
684 |
filename += 3; /* safe because filename is \ooo */ |
} else if (c == '\\') { |
685 |
} else { |
if (filename[1] == '\\') |
686 |
return 0; |
filename++; |
687 |
} |
else if (ccs_is_byte_range(filename + 1)) |
688 |
} |
filename += 3; |
689 |
break; |
else |
690 |
case '\\': |
return false; |
691 |
if (c != '\\') return 0; |
} |
692 |
if (*++filename != '\\') return 0; /* safe because *filename != '\0' */ |
break; |
693 |
break; |
case '\\': |
694 |
case '+': |
if (c != '\\') |
695 |
if (c < '0' || c > '9') return 0; |
return false; |
696 |
break; |
if (*++filename != '\\') |
697 |
case 'x': |
return false; |
698 |
if (!((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'))) return 0; |
break; |
699 |
break; |
case '+': |
700 |
case 'a': |
if (!ccs_is_decimal(c)) |
701 |
if (!((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'))) return 0; |
return false; |
702 |
|
break; |
703 |
|
case 'x': |
704 |
|
if (!ccs_is_hexadecimal(c)) |
705 |
|
return false; |
706 |
|
break; |
707 |
|
case 'a': |
708 |
|
if (!ccs_is_alphabet_char(c)) |
709 |
|
return false; |
710 |
|
break; |
711 |
|
case '0': |
712 |
|
case '1': |
713 |
|
case '2': |
714 |
|
case '3': |
715 |
|
if (c == '\\' && ccs_is_byte_range(filename + 1) |
716 |
|
&& strncmp(filename + 1, pattern, 3) == 0) { |
717 |
|
filename += 3; |
718 |
|
pattern += 2; |
719 |
break; |
break; |
720 |
case '0': |
} |
721 |
case '1': |
return false; /* Not matched. */ |
722 |
case '2': |
case '*': |
723 |
case '3': |
case '@': |
724 |
if (c == '\\' && (c = filename[1]) >= '0' && c <= '3' && c == *pattern |
for (i = 0; i <= filename_end - filename; i++) { |
725 |
&& (c = filename[2]) >= '0' && c <= '7' && c == pattern[1] |
if (ccs_file_matches_pattern2(filename + i, |
726 |
&& (c = filename[3]) >= '0' && c <= '7' && c == pattern[2]) { |
filename_end, |
727 |
filename += 3; /* safe because filename is \ooo */ |
pattern + 1, |
728 |
pattern += 2; /* safe because pattern is \ooo */ |
pattern_end)) |
729 |
|
return true; |
730 |
|
c = filename[i]; |
731 |
|
if (c == '.' && *pattern == '@') |
732 |
break; |
break; |
733 |
} |
if (c != '\\') |
734 |
return 0; /* Not matched. */ |
continue; |
735 |
case '*': |
if (filename[i + 1] == '\\') |
736 |
case '@': |
i++; |
737 |
{ |
else if (ccs_is_byte_range(filename + i + 1)) |
738 |
int i; |
i += 3; |
739 |
for (i = 0; i <= filename_end - filename; i++) { |
else |
740 |
if (FileMatchesToPattern2(filename + i, filename_end, pattern + 1, pattern_end)) return 1; |
break; /* Bad pattern. */ |
|
if ((c = filename[i]) == '.' && *pattern == '@') break; |
|
|
if (c == '\\') { |
|
|
if ((c = filename[i + 1]) == '\\') { |
|
|
i++; /* safe because filename is \\ */ |
|
|
} else if (c >= '0' && c <= '3' && (c = filename[i + 2]) >= '0' && c <= '7' && (c = filename[i + 3]) >= '0' && c <= '7') { |
|
|
i += 3; /* safe because filename is \ooo */ |
|
|
} else { |
|
|
break; /* Bad pattern. */ |
|
|
} |
|
|
} |
|
|
} |
|
|
return 0; /* Not matched. */ |
|
|
} |
|
|
default: |
|
|
{ |
|
|
int i, j = 0; |
|
|
if ((c = *pattern) == '$') { |
|
|
while ((c = filename[j]) >= '0' && c <= '9') j++; |
|
|
} else if (c == 'X') { |
|
|
while (((c = filename[j]) >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f')) j++; |
|
|
} else if (c == 'A') { |
|
|
while (((c = filename[j]) >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) j++; |
|
|
} |
|
|
for (i = 1; i <= j; i++) { |
|
|
if (FileMatchesToPattern2(filename + i, filename_end, pattern + 1, pattern_end)) return 1; |
|
|
} |
|
|
} |
|
|
return 0; /* Not matched or bad pattern. */ |
|
741 |
} |
} |
742 |
filename++; /* safe because *filename != '\0' */ |
return false; /* Not matched. */ |
743 |
pattern++; /* safe because *pattern != '\0' */ |
default: |
744 |
|
j = 0; |
745 |
|
c = *pattern; |
746 |
|
if (c == '$') { |
747 |
|
while (ccs_is_decimal(filename[j])) |
748 |
|
j++; |
749 |
|
} else if (c == 'X') { |
750 |
|
while (ccs_is_hexadecimal(filename[j])) |
751 |
|
j++; |
752 |
|
} else if (c == 'A') { |
753 |
|
while (ccs_is_alphabet_char(filename[j])) |
754 |
|
j++; |
755 |
|
} |
756 |
|
for (i = 1; i <= j; i++) { |
757 |
|
if (ccs_file_matches_pattern2(filename + i, |
758 |
|
filename_end, |
759 |
|
pattern + 1, |
760 |
|
pattern_end)) |
761 |
|
return true; |
762 |
|
} |
763 |
|
return false; /* Not matched or bad pattern. */ |
764 |
} |
} |
765 |
|
filename++; |
766 |
|
pattern++; |
767 |
} |
} |
768 |
while (*pattern == '\\' && (*(pattern + 1) == '*' || *(pattern + 1) == '@')) pattern += 2; |
while (*pattern == '\\' && |
769 |
return (filename == filename_end && pattern == pattern_end); |
(*(pattern + 1) == '*' || *(pattern + 1) == '@')) |
770 |
|
pattern += 2; |
771 |
|
return filename == filename_end && pattern == pattern_end; |
772 |
} |
} |
773 |
|
|
774 |
static int FileMatchesToPattern(const char *filename, const char *filename_end, const char *pattern, const char *pattern_end) |
/** |
775 |
|
* ccs_file_matches_pattern - Pattern matching without without '/' character. |
776 |
|
* |
777 |
|
* @filename: The start of string to check. |
778 |
|
* @filename_end: The end of string to check. |
779 |
|
* @pattern: The start of pattern to compare. |
780 |
|
* @pattern_end: The end of pattern to compare. |
781 |
|
* |
782 |
|
* Returns true if @filename matches @pattern, false otherwise. |
783 |
|
*/ |
784 |
|
static bool ccs_file_matches_pattern(const char *filename, |
785 |
|
const char *filename_end, |
786 |
|
const char *pattern, |
787 |
|
const char *pattern_end) |
788 |
{ |
{ |
789 |
const char *pattern_start = pattern; |
const char *pattern_start = pattern; |
790 |
int first = 1; |
bool first = true; |
791 |
int result; |
bool result; |
792 |
while (pattern < pattern_end - 1) { |
while (pattern < pattern_end - 1) { |
793 |
if (*pattern++ != '\\' || *pattern++ != '-') continue; |
/* Split at "\-" pattern. */ |
794 |
result = FileMatchesToPattern2(filename, filename_end, pattern_start, pattern - 2); |
if (*pattern++ != '\\' || *pattern++ != '-') |
795 |
if (first) result = !result; |
continue; |
796 |
if (result) return 0; |
result = ccs_file_matches_pattern2(filename, filename_end, |
797 |
first = 0; |
pattern_start, pattern - 2); |
798 |
|
if (first) |
799 |
|
result = !result; |
800 |
|
if (result) |
801 |
|
return false; |
802 |
|
first = false; |
803 |
pattern_start = pattern; |
pattern_start = pattern; |
804 |
} |
} |
805 |
result = FileMatchesToPattern2(filename, filename_end, pattern_start, pattern_end); |
result = ccs_file_matches_pattern2(filename, filename_end, |
806 |
|
pattern_start, pattern_end); |
807 |
return first ? result : !result; |
return first ? result : !result; |
808 |
} |
} |
809 |
|
|
810 |
/* |
/** |
811 |
* Check whether the given pathname matches to the given pattern. |
* ccs_path_matches_pattern - Check whether the given filename matches the given pattern. |
812 |
* Returns nonzero if matches, zero otherwise. |
* @filename: The filename to check. |
813 |
|
* @pattern: The pattern to compare. |
814 |
* |
* |
815 |
* The following patterns are available. |
* Returns true if matches, false otherwise. |
816 |
* \\ \ itself. |
* |
817 |
* \ooo Octal representation of a byte. |
* The following patterns are available. |
818 |
* \* More than or equals to 0 character other than '/'. |
* \\ \ itself. |
819 |
* \@ More than or equals to 0 character other than '/' or '.'. |
* \ooo Octal representation of a byte. |
820 |
* \? 1 byte character other than '/'. |
* \* More than or equals to 0 character other than '/'. |
821 |
* \$ More than or equals to 1 decimal digit. |
* \@ More than or equals to 0 character other than '/' or '.'. |
822 |
* \+ 1 decimal digit. |
* \? 1 byte character other than '/'. |
823 |
* \X More than or equals to 1 hexadecimal digit. |
* \$ More than or equals to 1 decimal digit. |
824 |
* \x 1 hexadecimal digit. |
* \+ 1 decimal digit. |
825 |
* \A More than or equals to 1 alphabet character. |
* \X More than or equals to 1 hexadecimal digit. |
826 |
* \a 1 alphabet character. |
* \x 1 hexadecimal digit. |
827 |
* \- Subtraction operator. |
* \A More than or equals to 1 alphabet character. |
828 |
*/ |
* \a 1 alphabet character. |
829 |
|
* \- Subtraction operator. |
|
int PathMatchesToPattern(const struct path_info *pathname0, const struct path_info *pattern0) |
|
|
{ |
|
|
/* if (!pathname || !pattern) return 0; */ |
|
|
const char *pathname = pathname0->name, *pattern = pattern0->name; |
|
|
const int len = pattern0->const_len; |
|
|
if (!pattern0->is_patterned) return !pathcmp(pathname0, pattern0); |
|
|
if (pathname0->depth != pattern0->depth) return 0; |
|
|
if (strncmp(pathname, pattern, len)) return 0; |
|
|
pathname += len; pattern += len; |
|
|
while (*pathname && *pattern) { |
|
|
const char *pathname_delimiter = strchr(pathname, '/'), *pattern_delimiter = strchr(pattern, '/'); |
|
|
if (!pathname_delimiter) pathname_delimiter = strchr(pathname, '\0'); |
|
|
if (!pattern_delimiter) pattern_delimiter = strchr(pattern, '\0'); |
|
|
if (!FileMatchesToPattern(pathname, pathname_delimiter, pattern, pattern_delimiter)) return 0; |
|
|
pathname = *pathname_delimiter ? pathname_delimiter + 1 : pathname_delimiter; |
|
|
pattern = *pattern_delimiter ? pattern_delimiter + 1 : pattern_delimiter; |
|
|
} |
|
|
while (*pattern == '\\' && (*(pattern + 1) == '*' || *(pattern + 1) == '@')) pattern += 2; |
|
|
return (!*pathname && !*pattern); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Transactional printf() to struct io_buffer structure. |
|
|
* snprintf() will truncate, but io_printf() won't. |
|
|
* Returns zero on success, nonzero otherwise. |
|
830 |
*/ |
*/ |
831 |
int io_printf(struct io_buffer *head, const char *fmt, ...) |
bool ccs_path_matches_pattern(const struct ccs_path_info *filename, |
832 |
|
const struct ccs_path_info *pattern) |
833 |
{ |
{ |
834 |
va_list args; |
/* |
835 |
int len, pos = head->read_avail, size = head->readbuf_size - pos; |
if (!filename || !pattern) |
836 |
if (size <= 0) return -ENOMEM; |
return false; |
837 |
va_start(args, fmt); |
*/ |
838 |
len = vsnprintf(head->read_buf + pos, size, fmt, args); |
const char *f = filename->name; |
839 |
va_end(args); |
const char *p = pattern->name; |
840 |
if (pos + len >= head->readbuf_size) return -ENOMEM; |
const int len = pattern->const_len; |
841 |
head->read_avail += len; |
/* If @pattern doesn't contain pattern, I can use strcmp(). */ |
842 |
return 0; |
if (!pattern->is_patterned) |
843 |
|
return !ccs_pathcmp(filename, pattern); |
844 |
|
/* Don't compare if the number of '/' differs. */ |
845 |
|
if (filename->depth != pattern->depth) |
846 |
|
return false; |
847 |
|
/* Compare the initial length without patterns. */ |
848 |
|
if (strncmp(f, p, len)) |
849 |
|
return false; |
850 |
|
f += len; |
851 |
|
p += len; |
852 |
|
/* Main loop. Compare each directory component. */ |
853 |
|
while (*f && *p) { |
854 |
|
const char *f_delimiter = strchr(f, '/'); |
855 |
|
const char *p_delimiter = strchr(p, '/'); |
856 |
|
if (!f_delimiter) |
857 |
|
f_delimiter = f + strlen(f); |
858 |
|
if (!p_delimiter) |
859 |
|
p_delimiter = p + strlen(p); |
860 |
|
if (!ccs_file_matches_pattern(f, f_delimiter, p, p_delimiter)) |
861 |
|
return false; |
862 |
|
f = f_delimiter; |
863 |
|
if (*f) |
864 |
|
f++; |
865 |
|
p = p_delimiter; |
866 |
|
if (*p) |
867 |
|
p++; |
868 |
|
} |
869 |
|
/* Ignore trailing "\*" and "\@" in @pattern. */ |
870 |
|
while (*p == '\\' && |
871 |
|
(*(p + 1) == '*' || *(p + 1) == '@')) |
872 |
|
p += 2; |
873 |
|
return !*f && !*p; |
874 |
} |
} |
875 |
|
|
876 |
/* |
/** |
877 |
* Get realpath() of current process. |
* ccs_get_exe - Get ccs_realpath() of current process. |
878 |
* This function uses ccs_alloc(), so caller must ccs_free() if this function didn't return NULL. |
* |
879 |
|
* Returns the ccs_realpath() of current process on success, NULL otherwise. |
880 |
|
* |
881 |
|
* This function uses kzalloc(), so the caller must kfree() |
882 |
|
* if this function didn't return NULL. |
883 |
*/ |
*/ |
884 |
const char *GetEXE(void) |
const char *ccs_get_exe(void) |
885 |
{ |
{ |
886 |
struct mm_struct *mm = current->mm; |
struct mm_struct *mm = current->mm; |
887 |
struct vm_area_struct *vma; |
struct vm_area_struct *vma; |
888 |
const char *cp = NULL; |
const char *cp = NULL; |
889 |
if (!mm) return NULL; |
if (!mm) |
890 |
|
return NULL; |
891 |
down_read(&mm->mmap_sem); |
down_read(&mm->mmap_sem); |
892 |
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
893 |
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
894 |
cp = realpath_from_dentry(vma->vm_file->f_dentry, vma->vm_file->f_vfsmnt); |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20) |
895 |
|
struct path path = { vma->vm_file->f_vfsmnt, |
896 |
|
vma->vm_file->f_dentry }; |
897 |
|
cp = ccs_realpath_from_path(&path); |
898 |
|
#else |
899 |
|
cp = ccs_realpath_from_path(&vma->vm_file->f_path); |
900 |
|
#endif |
901 |
break; |
break; |
902 |
} |
} |
903 |
} |
} |
905 |
return cp; |
return cp; |
906 |
} |
} |
907 |
|
|
908 |
const char *GetMSG(const bool is_enforce) |
/** |
909 |
{ |
* ccs_flags - Check mode for specified functionality. |
910 |
if (is_enforce) return "ERROR"; else return "WARNING"; |
* |
911 |
} |
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
912 |
|
* @index: The functionality to check mode. |
913 |
const char *GetAltExec(void) |
* |
914 |
{ |
* Returns the mode of specified functionality. |
915 |
const u8 profile = current->domain_info->profile; |
*/ |
916 |
const struct path_info *alt_exec = profile_ptr[profile] ? profile_ptr[profile]->alt_exec : NULL; |
unsigned int ccs_flags(const struct ccs_domain_info *domain, |
917 |
return alt_exec ? alt_exec->name : NULL; |
const u8 index) |
|
} |
|
|
|
|
|
/************************* DOMAIN POLICY HANDLER *************************/ |
|
|
|
|
|
/* Check whether the given access control is enabled. */ |
|
|
unsigned int CheckCCSFlags(const unsigned int index) |
|
918 |
{ |
{ |
919 |
const u8 profile = current->domain_info->profile; |
u8 profile; |
920 |
return sbin_init_started && index < CCS_MAX_CONTROL_INDEX |
if (!domain) |
921 |
#if MAX_PROFILES != 256 |
domain = ccs_current_domain(); |
922 |
&& profile < MAX_PROFILES |
profile = domain->profile; |
923 |
|
return ccs_policy_loaded && index < CCS_MAX_CONTROL_INDEX |
924 |
|
#if CCS_MAX_PROFILES != 256 |
925 |
|
&& profile < CCS_MAX_PROFILES |
926 |
#endif |
#endif |
927 |
&& profile_ptr[profile] ? profile_ptr[profile]->value[index] : 0; |
&& ccs_profile_ptr[profile] ? |
928 |
} |
ccs_profile_ptr[profile]->value[index] : 0; |
|
EXPORT_SYMBOL(CheckCCSFlags); |
|
|
|
|
|
bool TomoyoVerboseMode(void) |
|
|
{ |
|
|
return CheckCCSFlags(CCS_TOMOYO_VERBOSE) != 0; |
|
|
} |
|
|
|
|
|
/* Check whether the given access control is enforce mode. */ |
|
|
bool CheckCCSEnforce(const unsigned int index) |
|
|
{ |
|
|
return CheckCCSFlags(index) == 3; |
|
|
} |
|
|
EXPORT_SYMBOL(CheckCCSEnforce); |
|
|
|
|
|
bool CheckDomainQuota(struct domain_info * const domain) |
|
|
{ |
|
|
unsigned int count = 0; |
|
|
struct acl_info *ptr; |
|
|
if (!domain) return 1; |
|
|
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
|
|
if (!ptr->is_deleted) count++; |
|
|
} |
|
|
if (count < CheckCCSFlags(CCS_TOMOYO_MAX_ACCEPT_ENTRY)) return 1; |
|
|
if (!domain->quota_warned) { |
|
|
domain->quota_warned = 1; |
|
|
printk("TOMOYO-WARNING: Domain '%s' has so many ACLs to hold. Stopped learning mode.\n", domain->domainname->name); |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* Check whether the given access control is learning mode. */ |
|
|
bool CheckCCSAccept(const unsigned int index, struct domain_info * const domain) |
|
|
{ |
|
|
if (CheckCCSFlags(index) != 1) return 0; |
|
|
return CheckDomainQuota(domain); |
|
|
} |
|
|
EXPORT_SYMBOL(CheckCCSAccept); |
|
|
|
|
|
static struct profile *FindOrAssignNewProfile(const unsigned int profile) |
|
|
{ |
|
|
static DEFINE_MUTEX(profile_lock); |
|
|
struct profile *ptr = NULL; |
|
|
mutex_lock(&profile_lock); |
|
|
if (profile < MAX_PROFILES && (ptr = profile_ptr[profile]) == NULL) { |
|
|
if ((ptr = alloc_element(sizeof(*ptr))) != NULL) { |
|
|
int i; |
|
|
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) ptr->value[i] = ccs_control_array[i].current_value; |
|
|
mb(); /* Avoid out-of-order execution. */ |
|
|
profile_ptr[profile] = ptr; |
|
|
} |
|
|
} |
|
|
mutex_unlock(&profile_lock); |
|
|
return ptr; |
|
929 |
} |
} |
930 |
|
|
931 |
/* #define ALT_EXEC */ |
/** |
932 |
|
* ccs_get_audit - Get audit mode. |
933 |
static int SetProfile(struct io_buffer *head) |
* |
934 |
|
* @profile: Profile number. |
935 |
|
* @index: Index number of functionality. |
936 |
|
* @is_granted: True if granted log, false otehrwise. |
937 |
|
* |
938 |
|
* Returns mode. |
939 |
|
*/ |
940 |
|
bool ccs_get_audit(const u8 profile, const u8 index, const bool is_granted) |
941 |
{ |
{ |
942 |
char *data = head->write_buf; |
u8 mode; |
943 |
unsigned int i, value; |
const u8 category = ccs_index2category[index] + CCS_MAX_MAC_INDEX |
944 |
char *cp; |
+ CCS_MAX_CAPABILITY_INDEX; |
945 |
struct profile *profile; |
if (!ccs_policy_loaded || !ccs_profile_ptr[profile]) |
946 |
if (!isRoot()) return -EPERM; |
return false; |
947 |
i = simple_strtoul(data, &cp, 10); |
mode = ccs_profile_ptr[profile]->config[index]; |
948 |
if (data != cp) { |
if (mode == CCS_MAC_MODE_USE_DEFAULT) |
949 |
if (*cp != '-') return -EINVAL; |
mode = ccs_profile_ptr[profile]->config[category]; |
950 |
data= cp + 1; |
if (mode == CCS_MAC_MODE_USE_DEFAULT) |
951 |
} |
mode = ccs_profile_ptr[profile]->default_config; |
952 |
profile = FindOrAssignNewProfile(i); |
if (is_granted) |
953 |
if (!profile) return -EINVAL; |
return !(mode & CCS_MAC_MODE_NO_GRANT_LOG); |
954 |
cp = strchr(data, '='); |
return !(mode & CCS_MAC_MODE_NO_REJECT_LOG); |
|
if (!cp) return -EINVAL; |
|
|
*cp = '\0'; |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_PROFILE); |
|
|
if (strcmp(data, ccs_control_array[CCS_PROFILE_COMMENT].keyword) == 0) { |
|
|
profile->comment = SaveName(cp + 1); |
|
|
return 0; |
|
|
} |
|
|
#ifdef ALT_EXEC |
|
|
#ifdef CONFIG_TOMOYO |
|
|
if (strcmp(data, ccs_control_array[CCS_TOMOYO_ALT_EXEC].keyword) == 0) { |
|
|
cp++; |
|
|
if (*cp && !IsCorrectPath(cp, 1, -1, -1, __FUNCTION__)) cp = ""; |
|
|
profile->alt_exec = SaveName(cp); |
|
|
return 0; |
|
|
} |
|
|
#endif |
|
|
#endif |
|
|
if (sscanf(cp + 1, "%u", &value) != 1) return -EINVAL; |
|
|
#ifdef CONFIG_TOMOYO |
|
|
if (strncmp(data, KEYWORD_MAC_FOR_CAPABILITY, KEYWORD_MAC_FOR_CAPABILITY_LEN) == 0) { |
|
|
return SetCapabilityStatus(data + KEYWORD_MAC_FOR_CAPABILITY_LEN, value, i); |
|
|
} |
|
|
#endif |
|
|
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) { |
|
|
if (strcmp(data, ccs_control_array[i].keyword)) continue; |
|
|
if (value > ccs_control_array[i].max_value) value = ccs_control_array[i].max_value; |
|
|
profile->value[i] = value; |
|
|
return 0; |
|
|
} |
|
|
return -EINVAL; |
|
955 |
} |
} |
956 |
|
|
957 |
static int ReadProfile(struct io_buffer *head) |
/** |
958 |
{ |
* ccs_get_mode - Get MAC mode. |
959 |
if (!head->read_eof) { |
* |
960 |
if (!isRoot()) return -EPERM; |
* @profile: Profile number. |
961 |
if (!head->read_var2) { |
* @index: Index number of functionality. |
962 |
int step; |
* |
963 |
for (step = head->read_step; step < MAX_PROFILES * CCS_MAX_CONTROL_INDEX; step++) { |
* Returns mode. |
964 |
const int i = step / CCS_MAX_CONTROL_INDEX, j = step % CCS_MAX_CONTROL_INDEX; |
*/ |
965 |
const struct profile *profile = profile_ptr[i]; |
int ccs_get_mode(const u8 profile, const u8 index) |
|
head->read_step = step; |
|
|
if (!profile) continue; |
|
|
switch (j) { |
|
|
case -1: /* Dummy */ |
|
|
#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 |
|
|
#ifndef ALT_EXEC |
|
|
case CCS_TOMOYO_ALT_EXEC: |
|
|
case CCS_SLEEP_PERIOD: |
|
|
#endif |
|
|
continue; |
|
|
} |
|
|
if (j == CCS_PROFILE_COMMENT) { |
|
|
if (io_printf(head, "%u-%s=%s\n", i, ccs_control_array[CCS_PROFILE_COMMENT].keyword, profile->comment ? profile->comment->name : "")) break; |
|
|
} else if (j == CCS_TOMOYO_ALT_EXEC) { |
|
|
const struct path_info *alt_exec = profile->alt_exec; |
|
|
if (io_printf(head, "%u-%s=%s\n", i, ccs_control_array[CCS_TOMOYO_ALT_EXEC].keyword, alt_exec ? alt_exec->name : "")) break; |
|
|
} else { |
|
|
if (io_printf(head, "%u-%s=%u\n", i, ccs_control_array[j].keyword, profile->value[j])) break; |
|
|
} |
|
|
} |
|
|
if (step == MAX_PROFILES * CCS_MAX_CONTROL_INDEX) { |
|
|
head->read_var2 = (void *) ""; |
|
|
head->read_step = 0; |
|
|
} |
|
|
} |
|
|
if (head->read_var2) { |
|
|
#ifdef CONFIG_TOMOYO |
|
|
if (ReadCapabilityStatus(head) == 0) |
|
|
#endif |
|
|
head->read_eof = 1; |
|
|
} |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/************************* POLICY MANAGER HANDLER *************************/ |
|
|
|
|
|
struct policy_manager_entry { |
|
|
struct list1_head list; |
|
|
const struct path_info *manager; |
|
|
bool is_domain; |
|
|
bool is_deleted; |
|
|
}; |
|
|
|
|
|
static LIST1_HEAD(policy_manager_list); |
|
|
|
|
|
static int AddManagerEntry(const char *manager, const bool is_delete) |
|
966 |
{ |
{ |
967 |
struct policy_manager_entry *new_entry, *ptr; |
u8 mode; |
968 |
static DEFINE_MUTEX(lock); |
const u8 category = ccs_index2category[index] + CCS_MAX_MAC_INDEX |
969 |
const struct path_info *saved_manager; |
+ CCS_MAX_CAPABILITY_INDEX; |
970 |
int error = -ENOMEM; |
if (!ccs_policy_loaded || !ccs_profile_ptr[profile]) |
971 |
bool is_domain = 0; |
return CCS_MAC_MODE_DISABLED; |
972 |
if (!isRoot()) return -EPERM; |
mode = ccs_profile_ptr[profile]->config[index]; |
973 |
if (IsDomainDef(manager)) { |
if (mode == CCS_MAC_MODE_USE_DEFAULT) |
974 |
if (!IsCorrectDomain(manager, __FUNCTION__)) return -EINVAL; |
mode = ccs_profile_ptr[profile]->config[category]; |
975 |
is_domain = 1; |
if (mode == CCS_MAC_MODE_USE_DEFAULT) |
976 |
} else { |
mode = ccs_profile_ptr[profile]->default_config; |
977 |
if (!IsCorrectPath(manager, 1, -1, -1, __FUNCTION__)) return -EINVAL; |
return mode & 3; |
|
} |
|
|
if ((saved_manager = SaveName(manager)) == NULL) return -ENOMEM; |
|
|
mutex_lock(&lock); |
|
|
list1_for_each_entry(ptr, &policy_manager_list, list) { |
|
|
if (ptr->manager == saved_manager) { |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
goto out; |
|
|
} |
|
|
} |
|
|
if (is_delete) { |
|
|
error = -ENOENT; |
|
|
goto out; |
|
|
} |
|
|
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) 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) UpdateCounter(CCS_UPDATES_COUNTER_MANAGER); |
|
|
return error; |
|
978 |
} |
} |
979 |
|
|
980 |
static int AddManagerPolicy(struct io_buffer *head) |
/** |
981 |
|
* ccs_init_request_info - Initialize "struct ccs_request_info" members. |
982 |
|
* |
983 |
|
* @r: Pointer to "struct ccs_request_info" to initialize. |
984 |
|
* @domain: Pointer to "struct ccs_domain_info". NULL for ccs_current_domain(). |
985 |
|
* @index: Index number of functionality. |
986 |
|
* |
987 |
|
* Returns mode. |
988 |
|
*/ |
989 |
|
int ccs_init_request_info(struct ccs_request_info *r, |
990 |
|
struct ccs_domain_info *domain, const u8 index) |
991 |
{ |
{ |
992 |
const char *data = head->write_buf; |
u8 profile; |
993 |
bool is_delete = 0; |
memset(r, 0, sizeof(*r)); |
994 |
if (!isRoot()) return -EPERM; |
if (!domain) |
995 |
if (strncmp(data, KEYWORD_DELETE, KEYWORD_DELETE_LEN) == 0) { |
domain = ccs_current_domain(); |
996 |
data += KEYWORD_DELETE_LEN; |
r->domain = domain; |
997 |
is_delete = 1; |
profile = domain->profile; |
998 |
} |
r->profile = profile; |
999 |
return AddManagerEntry(data, is_delete); |
r->type = index; |
1000 |
|
r->mode = ccs_get_mode(profile, index); |
1001 |
|
return r->mode; |
1002 |
} |
} |
1003 |
|
|
1004 |
static int ReadManagerPolicy(struct io_buffer *head) |
/** |
1005 |
|
* ccs_last_word - Get last component of a line. |
1006 |
|
* |
1007 |
|
* @line: A line. |
1008 |
|
* |
1009 |
|
* Returns the last word of a line. |
1010 |
|
*/ |
1011 |
|
const char *ccs_last_word(const char *name) |
1012 |
{ |
{ |
1013 |
struct list1_head *pos; |
const char *cp = strrchr(name, ' '); |
1014 |
if (head->read_eof) return 0; |
if (cp) |
1015 |
if (!isRoot()) return -EPERM; |
return cp + 1; |
1016 |
list1_for_each_cookie(pos, head->read_var2, &policy_manager_list) { |
return name; |
|
struct policy_manager_entry *ptr; |
|
|
ptr = list1_entry(pos, struct policy_manager_entry, list); |
|
|
if (ptr->is_deleted) continue; |
|
|
if (io_printf(head, "%s\n", ptr->manager->name)) return 0; |
|
|
} |
|
|
head->read_eof = 1; |
|
|
return 0; |
|
1017 |
} |
} |
1018 |
|
|
1019 |
/* Check whether the current process is a policy manager. */ |
void ccs_warn_log(struct ccs_request_info *r, const char *fmt, ...) |
|
static int IsPolicyManager(void) |
|
1020 |
{ |
{ |
1021 |
struct policy_manager_entry *ptr; |
int len = PAGE_SIZE; |
1022 |
const char *exe; |
va_list args; |
1023 |
const struct path_info *domainname = current->domain_info->domainname; |
char *buffer; |
1024 |
bool found = 0; |
if (!ccs_flags(r->domain, CCS_VERBOSE)) |
1025 |
if (!sbin_init_started) return 1; |
return; |
1026 |
list1_for_each_entry(ptr, &policy_manager_list, list) { |
while (1) { |
1027 |
if (!ptr->is_deleted && ptr->is_domain && !pathcmp(domainname, ptr->manager)) return 1; |
int len2; |
1028 |
} |
buffer = kmalloc(len, GFP_KERNEL); |
1029 |
if ((exe = GetEXE()) == NULL) return 0; |
if (!buffer) |
1030 |
list1_for_each_entry(ptr, &policy_manager_list, list) { |
return; |
1031 |
if (!ptr->is_deleted && !ptr->is_domain && !strcmp(exe, ptr->manager->name)) { |
va_start(args, fmt); |
1032 |
found = 1; |
len2 = vsnprintf(buffer, len - 1, fmt, args); |
1033 |
|
va_end(args); |
1034 |
|
if (len2 < len - 1) { |
1035 |
|
buffer[len2] = '\0'; |
1036 |
break; |
break; |
1037 |
} |
} |
1038 |
|
len = len2 + 1; |
1039 |
|
kfree(buffer); |
1040 |
} |
} |
1041 |
if (!found) { /* Reduce error messages. */ |
printk(KERN_WARNING "%s: Access %s denied for %s\n", |
1042 |
static pid_t last_pid = 0; |
r->mode == CCS_MAC_MODE_ENFORCING ? "ERROR" : "WARNING", buffer, |
1043 |
const pid_t pid = current->pid; |
ccs_last_word(r->domain->domainname->name)); |
1044 |
if (last_pid != pid) { |
kfree(buffer); |
|
printk("%s ( %s ) is not permitted to update policies.\n", domainname->name, exe); |
|
|
last_pid = pid; |
|
|
} |
|
|
} |
|
|
ccs_free(exe); |
|
|
return found; |
|
|
} |
|
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
|
|
|
|
/************************* DOMAIN POLICY HANDLER *************************/ |
|
|
|
|
|
static char *FindConditionPart(char *data) |
|
|
{ |
|
|
char *cp = strstr(data, " if "), *cp2; |
|
|
if (cp) { |
|
|
while ((cp2 = strstr(cp + 3, " if ")) != NULL) cp = cp2; |
|
|
*cp++ = '\0'; |
|
|
} |
|
|
return cp; |
|
1045 |
} |
} |
1046 |
|
|
1047 |
static int AddDomainPolicy(struct io_buffer *head) |
/** |
1048 |
{ |
* ccs_domain_quota_ok - Check for domain's quota. |
1049 |
char *data = head->write_buf; |
* |
1050 |
struct domain_info *domain = head->write_var1; |
* @r: Pointer to "struct ccs_request_info". |
1051 |
bool is_delete = 0, is_select = 0, is_undelete = 0; |
* |
1052 |
unsigned int profile; |
* Returns true if the domain is not exceeded quota, false otherwise. |
1053 |
const struct condition_list *cond = NULL; |
* |
1054 |
char *cp; |
* Caller holds ccs_read_lock(). |
1055 |
if (!isRoot()) return -EPERM; |
*/ |
1056 |
if (strncmp(data, KEYWORD_DELETE, KEYWORD_DELETE_LEN) == 0) { |
bool ccs_domain_quota_ok(struct ccs_request_info *r) |
|
data += KEYWORD_DELETE_LEN; |
|
|
is_delete = 1; |
|
|
} else if (strncmp(data, KEYWORD_SELECT, KEYWORD_SELECT_LEN) == 0) { |
|
|
data += KEYWORD_SELECT_LEN; |
|
|
is_select = 1; |
|
|
} else if (strncmp(data, KEYWORD_UNDELETE, KEYWORD_UNDELETE_LEN) == 0) { |
|
|
data += KEYWORD_UNDELETE_LEN; |
|
|
is_undelete = 1; |
|
|
} |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
|
if (IsDomainDef(data)) { |
|
|
if (is_delete) { |
|
|
DeleteDomain(data); |
|
|
domain = NULL; |
|
|
} else if (is_select) { |
|
|
domain = FindDomain(data); |
|
|
} else if (is_undelete) { |
|
|
domain = UndeleteDomain(data); |
|
|
} else { |
|
|
domain = FindOrAssignNewDomain(data, 0); |
|
|
} |
|
|
head->write_var1 = domain; |
|
|
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; |
|
|
} |
|
|
cp = FindConditionPart(data); |
|
|
if (cp && (cond = FindOrAssignNewCondition(cp)) == NULL) return -EINVAL; |
|
|
if (strncmp(data, KEYWORD_ALLOW_CAPABILITY, KEYWORD_ALLOW_CAPABILITY_LEN) == 0) { |
|
|
return AddCapabilityPolicy(data + KEYWORD_ALLOW_CAPABILITY_LEN, domain, cond, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_NETWORK, KEYWORD_ALLOW_NETWORK_LEN) == 0) { |
|
|
return AddNetworkPolicy(data + KEYWORD_ALLOW_NETWORK_LEN, domain, cond, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_SIGNAL, KEYWORD_ALLOW_SIGNAL_LEN) == 0) { |
|
|
return AddSignalPolicy(data + KEYWORD_ALLOW_SIGNAL_LEN, domain, cond, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_ARGV0, KEYWORD_ALLOW_ARGV0_LEN) == 0) { |
|
|
return AddArgv0Policy(data + KEYWORD_ALLOW_ARGV0_LEN, domain, cond, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_ENV, KEYWORD_ALLOW_ENV_LEN) == 0) { |
|
|
return AddEnvPolicy(data + KEYWORD_ALLOW_ENV_LEN, domain, cond, is_delete); |
|
|
} else { |
|
|
return AddFilePolicy(data, domain, cond, is_delete); |
|
|
} |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
static int ReadDomainPolicy(struct io_buffer *head) |
|
|
{ |
|
|
struct list1_head *dpos; |
|
|
struct list1_head *apos; |
|
|
if (head->read_eof) return 0; |
|
|
if (head->read_step == 0) { |
|
|
if (!isRoot()) return -EPERM; |
|
|
head->read_step = 1; |
|
|
} |
|
|
list1_for_each_cookie(dpos, head->read_var1, &domain_list) { |
|
|
struct domain_info *domain; |
|
|
domain = list1_entry(dpos, struct domain_info, list); |
|
|
if (head->read_step != 1) goto acl_loop; |
|
|
if (domain->is_deleted) continue; |
|
|
if (io_printf(head, "%s\n" KEYWORD_USE_PROFILE "%u\n%s\n", domain->domainname->name, domain->profile, domain->quota_warned ? "quota_exceeded\n" : "")) return 0; |
|
|
head->read_step = 2; |
|
|
acl_loop: ; |
|
|
if (head->read_step == 3) goto tail_mark; |
|
|
list1_for_each_cookie(apos, head->read_var2, &domain->acl_info_list) { |
|
|
struct acl_info *ptr; |
|
|
int pos; |
|
|
u8 acl_type; |
|
|
ptr = list1_entry(apos, struct acl_info, list); |
|
|
if (ptr->is_deleted) continue; |
|
|
pos = head->read_avail; |
|
|
acl_type = ptr->type; |
|
|
if (acl_type == TYPE_FILE_ACL) { |
|
|
struct file_acl_record *ptr2 = container_of(ptr, struct file_acl_record, head); |
|
|
const unsigned char b = ptr2->u_is_group; |
|
|
if (io_printf(head, "%d %s%s", ptr2->perm, |
|
|
b ? "@" : "", |
|
|
b ? ptr2->u.group->group_name->name : ptr2->u.filename->name)) goto print_acl_rollback; |
|
|
} else if (acl_type == TYPE_ARGV0_ACL) { |
|
|
struct argv0_acl_record *ptr2 = container_of(ptr, struct argv0_acl_record, head); |
|
|
if (io_printf(head, KEYWORD_ALLOW_ARGV0 "%s %s", |
|
|
ptr2->filename->name, ptr2->argv0->name)) goto print_acl_rollback; |
|
|
} else if (acl_type == TYPE_ENV_ACL) { |
|
|
struct env_acl_record *ptr2 = container_of(ptr, struct env_acl_record, head); |
|
|
if (io_printf(head, KEYWORD_ALLOW_ENV "%s", ptr2->env->name)) goto print_acl_rollback; |
|
|
} else if (acl_type == TYPE_CAPABILITY_ACL) { |
|
|
struct capability_acl_record *ptr2 = container_of(ptr, struct capability_acl_record, head); |
|
|
if (io_printf(head, KEYWORD_ALLOW_CAPABILITY "%s", capability2keyword(ptr2->capability))) goto print_acl_rollback; |
|
|
} else if (acl_type == TYPE_IP_NETWORK_ACL) { |
|
|
struct ip_network_acl_record *ptr2 = container_of(ptr, struct ip_network_acl_record, head); |
|
|
if (io_printf(head, KEYWORD_ALLOW_NETWORK "%s ", network2keyword(ptr2->operation_type))) goto print_acl_rollback; |
|
|
switch (ptr2->record_type) { |
|
|
case IP_RECORD_TYPE_ADDRESS_GROUP: |
|
|
if (io_printf(head, "@%s", ptr2->u.group->group_name->name)) goto print_acl_rollback; |
|
|
break; |
|
|
case IP_RECORD_TYPE_IPv4: |
|
|
{ |
|
|
const u32 min_address = ptr2->u.ipv4.min, max_address = ptr2->u.ipv4.max; |
|
|
if (io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) goto print_acl_rollback; |
|
|
if (min_address != max_address && io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) goto print_acl_rollback; |
|
|
} |
|
|
break; |
|
|
case IP_RECORD_TYPE_IPv6: |
|
|
{ |
|
|
char buf[64]; |
|
|
const struct in6_addr *min_address = ptr2->u.ipv6.min, *max_address = ptr2->u.ipv6.max; |
|
|
print_ipv6(buf, sizeof(buf), min_address); |
|
|
if (io_printf(head, "%s", buf)) goto print_acl_rollback; |
|
|
if (min_address != max_address) { |
|
|
print_ipv6(buf, sizeof(buf), max_address); |
|
|
if (io_printf(head, "-%s", buf)) goto print_acl_rollback; |
|
|
} |
|
|
} |
|
|
break; |
|
|
} |
|
|
{ |
|
|
const u16 min_port = ptr2->min_port, max_port = ptr2->max_port; |
|
|
if (io_printf(head, " %u", min_port)) goto print_acl_rollback; |
|
|
if (min_port != max_port && io_printf(head, "-%u", max_port)) goto print_acl_rollback; |
|
|
} |
|
|
} else if (acl_type == TYPE_SIGNAL_ACL) { |
|
|
struct signal_acl_record *ptr2 = container_of(ptr, struct signal_acl_record, head); |
|
|
if (io_printf(head, KEYWORD_ALLOW_SIGNAL "%u %s", ptr2->sig, ptr2->domainname->name)) goto print_acl_rollback; |
|
|
} else { |
|
|
const char *keyword = acltype2keyword(acl_type); |
|
|
if (!keyword) continue; |
|
|
if (acltype2paths(acl_type) == 2) { |
|
|
struct double_acl_record *ptr2 = container_of(ptr, struct double_acl_record, head); |
|
|
const bool b0 = ptr2->u1_is_group, b1 = ptr2->u2_is_group; |
|
|
if (io_printf(head, "allow_%s %s%s %s%s", keyword, |
|
|
b0 ? "@" : "", b0 ? ptr2->u1.group1->group_name->name : ptr2->u1.filename1->name, |
|
|
b1 ? "@" : "", b1 ? ptr2->u2.group2->group_name->name : ptr2->u2.filename2->name)) goto print_acl_rollback; |
|
|
} else { |
|
|
struct single_acl_record *ptr2 = container_of(ptr, struct single_acl_record, head); |
|
|
const bool b = ptr2->u_is_group; |
|
|
if (io_printf(head, "allow_%s %s%s", keyword, |
|
|
b ? "@" : "", b ? ptr2->u.group->group_name->name : ptr2->u.filename->name)) goto print_acl_rollback; |
|
|
} |
|
|
} |
|
|
if (DumpCondition(head, ptr->cond)) { |
|
|
print_acl_rollback: ; |
|
|
head->read_avail = pos; |
|
|
return 0; |
|
|
} |
|
|
} |
|
|
head->read_step = 3; |
|
|
tail_mark: ; |
|
|
if (io_printf(head, "\n")) return 0; |
|
|
head->read_step = 1; |
|
|
} |
|
|
head->read_eof = 1; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#endif |
|
|
|
|
|
static int UpdateDomainProfile(struct io_buffer *head) |
|
1057 |
{ |
{ |
1058 |
char *data = head->write_buf; |
unsigned int count = 0; |
1059 |
char *cp = strchr(data, ' '); |
struct ccs_domain_info *domain = r->domain; |
1060 |
struct domain_info *domain; |
struct ccs_acl_info *ptr; |
1061 |
unsigned int profile; |
ccs_assert_read_lock(); |
1062 |
if (!isRoot()) return -EPERM; |
if (r->mode != 1) |
1063 |
if (!cp) return -EINVAL; |
return false; |
1064 |
*cp = '\0'; |
if (!domain) |
1065 |
domain = FindDomain(cp + 1); |
return true; |
1066 |
profile = simple_strtoul(data, NULL, 10); |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
1067 |
if (domain && profile < MAX_PROFILES && (profile_ptr[profile] || !sbin_init_started)) domain->profile = (u8) profile; |
if (ptr->is_deleted) |
1068 |
UpdateCounter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
continue; |
1069 |
return 0; |
switch (ptr->type) { |
1070 |
} |
u16 perm; |
1071 |
|
u8 i; |
1072 |
static int ReadDomainProfile(struct io_buffer *head) |
case CCS_TYPE_PATH_ACL: |
1073 |
{ |
perm = container_of(ptr, struct ccs_path_acl, head)-> |
1074 |
struct list1_head *pos; |
perm; |
1075 |
if (head->read_eof) return 0; |
for (i = 0; i < CCS_MAX_PATH_OPERATION; i++) |
1076 |
if (!isRoot()) return -EPERM; |
if (perm & (1 << i)) |
1077 |
list1_for_each_cookie(pos, head->read_var1, &domain_list) { |
count++; |
1078 |
struct domain_info *domain; |
if (perm & (1 << CCS_TYPE_READ_WRITE)) |
1079 |
domain = list1_entry(pos, struct domain_info, list); |
count -= 2; |
|
if (domain->is_deleted) continue; |
|
|
if (io_printf(head, "%u %s\n", domain->profile, domain->domainname->name)) return 0; |
|
|
} |
|
|
head->read_eof = 1; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int WritePID(struct io_buffer *head) |
|
|
{ |
|
|
head->read_step = (int) simple_strtoul(head->write_buf, NULL, 10); |
|
|
head->read_eof = 0; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int ReadPID(struct io_buffer *head) |
|
|
{ |
|
|
if (head->read_avail == 0 && !head->read_eof) { |
|
|
const int pid = head->read_step; |
|
|
struct task_struct *p; |
|
|
struct domain_info *domain = NULL; |
|
|
/***** 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 *****/ |
|
|
if (domain) io_printf(head, "%d %u %s", pid, domain->profile, domain->domainname->name); |
|
|
head->read_eof = 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/************************* EXCEPTION POLICY HANDLER *************************/ |
|
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
|
|
|
|
static int AddExceptionPolicy(struct io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
bool is_delete = 0; |
|
|
if (!isRoot()) return -EPERM; |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
|
|
if (strncmp(data, KEYWORD_DELETE, KEYWORD_DELETE_LEN) == 0) { |
|
|
data += KEYWORD_DELETE_LEN; |
|
|
is_delete = 1; |
|
|
} |
|
|
if (strncmp(data, KEYWORD_KEEP_DOMAIN, KEYWORD_KEEP_DOMAIN_LEN) == 0) { |
|
|
return AddDomainKeeperPolicy(data + KEYWORD_KEEP_DOMAIN_LEN, 0, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_NO_KEEP_DOMAIN, KEYWORD_NO_KEEP_DOMAIN_LEN) == 0) { |
|
|
return AddDomainKeeperPolicy(data + KEYWORD_NO_KEEP_DOMAIN_LEN, 1, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_INITIALIZE_DOMAIN, KEYWORD_INITIALIZE_DOMAIN_LEN) == 0) { |
|
|
return AddDomainInitializerPolicy(data + KEYWORD_INITIALIZE_DOMAIN_LEN, 0, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_NO_INITIALIZE_DOMAIN, KEYWORD_NO_INITIALIZE_DOMAIN_LEN) == 0) { |
|
|
return AddDomainInitializerPolicy(data + KEYWORD_NO_INITIALIZE_DOMAIN_LEN, 1, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALIAS, KEYWORD_ALIAS_LEN) == 0) { |
|
|
return AddAliasPolicy(data + KEYWORD_ALIAS_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_AGGREGATOR, KEYWORD_AGGREGATOR_LEN) == 0) { |
|
|
return AddAggregatorPolicy(data + KEYWORD_AGGREGATOR_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_READ, KEYWORD_ALLOW_READ_LEN) == 0) { |
|
|
return AddGloballyReadablePolicy(data + KEYWORD_ALLOW_READ_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ALLOW_ENV, KEYWORD_ALLOW_ENV_LEN) == 0) { |
|
|
return AddGloballyUsableEnvPolicy(data + KEYWORD_ALLOW_ENV_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_FILE_PATTERN, KEYWORD_FILE_PATTERN_LEN) == 0) { |
|
|
return AddPatternPolicy(data + KEYWORD_FILE_PATTERN_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_PATH_GROUP, KEYWORD_PATH_GROUP_LEN) == 0) { |
|
|
return AddPathGroupPolicy(data + KEYWORD_PATH_GROUP_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_DENY_REWRITE, KEYWORD_DENY_REWRITE_LEN) == 0) { |
|
|
return AddNoRewritePolicy(data + KEYWORD_DENY_REWRITE_LEN, is_delete); |
|
|
} else if (strncmp(data, KEYWORD_ADDRESS_GROUP, KEYWORD_ADDRESS_GROUP_LEN) == 0) { |
|
|
return AddAddressGroupPolicy(data + KEYWORD_ADDRESS_GROUP_LEN, is_delete); |
|
|
} |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
static int ReadExceptionPolicy(struct io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
switch (head->read_step) { |
|
|
case 0: |
|
|
if (!isRoot()) return -EPERM; |
|
|
head->read_var2 = NULL; head->read_step = 1; |
|
|
case 1: |
|
|
if (ReadDomainKeeperPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 2; |
|
|
case 2: |
|
|
if (ReadGloballyReadablePolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 3; |
|
|
case 3: |
|
|
if (ReadGloballyUsableEnvPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 4; |
|
|
case 4: |
|
|
if (ReadDomainInitializerPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 5; |
|
|
case 5: |
|
|
if (ReadAliasPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 6; |
|
|
case 6: |
|
|
if (ReadAggregatorPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 7; |
|
|
case 7: |
|
|
if (ReadPatternPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 8; |
|
|
case 8: |
|
|
if (ReadNoRewritePolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 9; |
|
|
case 9: |
|
|
if (ReadPathGroupPolicy(head)) break; |
|
|
head->read_var1 = head->read_var2 = NULL; head->read_step = 10; |
|
|
case 10: |
|
|
if (ReadAddressGroupPolicy(head)) break; |
|
|
head->read_eof = 1; |
|
1080 |
break; |
break; |
1081 |
default: |
case CCS_TYPE_PATH2_ACL: |
1082 |
return -EINVAL; |
perm = container_of(ptr, struct ccs_path2_acl, |
1083 |
} |
head)->perm; |
1084 |
} |
for (i = 0; i < CCS_MAX_PATH2_OPERATION; i++) |
1085 |
return 0; |
if (perm & (1 << i)) |
1086 |
} |
count++; |
|
|
|
|
#endif |
|
|
|
|
|
/************************* SYSTEM POLICY HANDLER *************************/ |
|
|
|
|
|
#ifdef CONFIG_SAKURA |
|
|
|
|
|
static int AddSystemPolicy(struct io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
bool is_delete = 0; |
|
|
if (!isRoot()) return -EPERM; |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_SYSTEM_POLICY); |
|
|
if (strncmp(data, KEYWORD_DELETE, KEYWORD_DELETE_LEN) == 0) { |
|
|
data += KEYWORD_DELETE_LEN; |
|
|
is_delete = 1; |
|
|
} |
|
|
if (strncmp(data, KEYWORD_ALLOW_MOUNT, KEYWORD_ALLOW_MOUNT_LEN) == 0) |
|
|
return AddMountPolicy(data + KEYWORD_ALLOW_MOUNT_LEN, is_delete); |
|
|
if (strncmp(data, KEYWORD_DENY_UNMOUNT, KEYWORD_DENY_UNMOUNT_LEN) == 0) |
|
|
return AddNoUmountPolicy(data + KEYWORD_DENY_UNMOUNT_LEN, is_delete); |
|
|
if (strncmp(data, KEYWORD_ALLOW_CHROOT, KEYWORD_ALLOW_CHROOT_LEN) == 0) |
|
|
return AddChrootPolicy(data + KEYWORD_ALLOW_CHROOT_LEN, is_delete); |
|
|
if (strncmp(data, KEYWORD_ALLOW_PIVOT_ROOT, KEYWORD_ALLOW_PIVOT_ROOT_LEN) == 0) |
|
|
return AddPivotRootPolicy(data + KEYWORD_ALLOW_PIVOT_ROOT_LEN, is_delete); |
|
|
if (strncmp(data, KEYWORD_DENY_AUTOBIND, KEYWORD_DENY_AUTOBIND_LEN) == 0) |
|
|
return AddReservedPortPolicy(data + KEYWORD_DENY_AUTOBIND_LEN, is_delete); |
|
|
return -EINVAL; |
|
|
} |
|
|
|
|
|
static int ReadSystemPolicy(struct io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
switch (head->read_step) { |
|
|
case 0: |
|
|
if (!isRoot()) return -EPERM; |
|
|
head->read_var2 = NULL; head->read_step = 1; |
|
|
case 1: |
|
|
if (ReadMountPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 2; |
|
|
case 2: |
|
|
if (ReadNoUmountPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 3; |
|
|
case 3: |
|
|
if (ReadChrootPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 4; |
|
|
case 4: |
|
|
if (ReadPivotRootPolicy(head)) break; |
|
|
head->read_var2 = NULL; head->read_step = 5; |
|
|
case 5: |
|
|
if (ReadReservedPortPolicy(head)) break; |
|
|
head->read_eof = 1; |
|
1087 |
break; |
break; |
1088 |
default: |
case CCS_TYPE_EXECUTE_HANDLER: |
1089 |
return -EINVAL; |
case CCS_TYPE_DENIED_EXECUTE_HANDLER: |
|
} |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
#endif |
|
|
|
|
|
/************************* POLICY LOADER *************************/ |
|
|
|
|
|
static int profile_loaded = 0; |
|
|
|
|
|
static const char *ccs_loader = NULL; |
|
|
|
|
|
static int __init CCS_loader_Setup(char *str) |
|
|
{ |
|
|
ccs_loader = str; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
__setup("CCS_loader=", CCS_loader_Setup); |
|
|
|
|
|
void CCS_LoadPolicy(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", for |
|
|
* only the pathname is needed to activate Mandatory Access Control. |
|
|
*/ |
|
|
if (strcmp(filename, "/sbin/init") != 0 && strcmp(filename, "/sbin/ccs-start") != 0) return; |
|
|
/* |
|
|
* Don't activate MAC if the path given by 'CCS_loader=' option doesn't exist. |
|
|
* If initrd.img includes /sbin/init but real-root-dev has not mounted on / yet, |
|
|
* activating MAC will block the system since policies are not loaded yet. |
|
|
* So 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("Not activating Mandatory Access Control now since %s doesn't exist.\n", ccs_loader); |
|
|
return; |
|
|
} |
|
|
path_release(&nd); |
|
|
} |
|
|
if (!profile_loaded) { |
|
|
char *argv[2], *envp[3]; |
|
|
printk("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; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
|
|
call_usermodehelper(argv[0], argv, envp, 1); |
|
|
#else |
|
|
call_usermodehelper(argv[0], argv, envp); |
|
|
#endif |
|
|
while (!profile_loaded) { |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
|
|
schedule_timeout(HZ / 10); |
|
|
} |
|
|
} |
|
|
#ifdef CONFIG_SAKURA |
|
|
printk("SAKURA: 1.5.2-pre 2007/11/29\n"); |
|
|
#endif |
|
|
#ifdef CONFIG_TOMOYO |
|
|
printk("TOMOYO: 1.5.2-pre 2007/11/29\n"); |
|
|
#endif |
|
|
//if (!profile_loaded) panic("No profiles loaded. Run policy loader using 'init=' option.\n"); |
|
|
printk("Mandatory Access Control activated.\n"); |
|
|
sbin_init_started = 1; |
|
|
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]) panic("Profile %u (used by '%s') not defined.\n", profile, domain->domainname->name); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
|
|
|
/************************* MAC Decision Delayer *************************/ |
|
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(query_wait); |
|
|
|
|
|
static spinlock_t query_lock = SPIN_LOCK_UNLOCKED; |
|
|
|
|
|
struct query_entry { |
|
|
struct list_head list; |
|
|
char *query; |
|
|
int query_len; |
|
|
unsigned int serial; |
|
|
int timer; |
|
|
int answer; |
|
|
}; |
|
|
|
|
|
static LIST_HEAD(query_list); |
|
|
static atomic_t queryd_watcher = ATOMIC_INIT(0); |
|
|
|
|
|
int CheckSupervisor(const char *fmt, ...) |
|
|
{ |
|
|
va_list args; |
|
|
int error = -EPERM; |
|
|
int pos, len; |
|
|
static unsigned int serial = 0; |
|
|
struct query_entry *query_entry; |
|
|
if (!CheckCCSFlags(CCS_ALLOW_ENFORCE_GRACE) || !atomic_read(&queryd_watcher)) { |
|
|
#ifndef ALT_EXEC |
|
|
if ((current->tomoyo_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) == 0) { |
|
|
int i; |
|
|
for (i = 0; i < CheckCCSFlags(CCS_SLEEP_PERIOD); i++) { |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
|
|
schedule_timeout(HZ / 10); |
|
|
} |
|
|
} |
|
|
#endif |
|
|
return -EPERM; |
|
|
} |
|
|
va_start(args, fmt); |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
|
|
va_end(args); |
|
|
if ((query_entry = ccs_alloc(sizeof(*query_entry))) == NULL || |
|
|
(query_entry->query = ccs_alloc(len)) == NULL) goto out; |
|
|
INIT_LIST_HEAD(&query_entry->list); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_lock); |
|
|
query_entry->serial = serial++; |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
pos = snprintf(query_entry->query, len - 1, "Q%u\n", query_entry->serial); |
|
|
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_lock); |
|
|
list_add_tail(&query_entry->list, &query_list); |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_QUERY); |
|
|
/* Give 10 seconds for supervisor's opinion. */ |
|
|
for (query_entry->timer = 0; atomic_read(&queryd_watcher) && CheckCCSFlags(CCS_ALLOW_ENFORCE_GRACE) && 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; |
|
|
} |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_QUERY); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_lock); |
|
|
list_del(&query_entry->list); |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
switch (query_entry->answer) { |
|
|
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); |
|
|
return error; |
|
|
} |
|
|
|
|
|
static int PollQuery(struct file *file, poll_table *wait) |
|
|
{ |
|
|
int found; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_lock); |
|
|
found = !list_empty(&query_list); |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (found) return POLLIN | POLLRDNORM; |
|
|
poll_wait(file, &query_wait, wait); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_lock); |
|
|
found = !list_empty(&query_list); |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (found) return POLLIN | POLLRDNORM; |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int ReadQuery(struct io_buffer *head) |
|
|
{ |
|
|
struct list_head *tmp; |
|
|
int pos = 0, 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_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr = list_entry(tmp, struct query_entry, list); |
|
|
if (pos++ == head->read_step) { |
|
|
len = ptr->query_len; |
|
1090 |
break; |
break; |
1091 |
} |
case CCS_TYPE_PATH_NUMBER_ACL: |
1092 |
} |
perm = container_of(ptr, struct ccs_path_number_acl, |
1093 |
spin_unlock(&query_lock); |
head)->perm; |
1094 |
/***** CRITICAL SECTION END *****/ |
for (i = 0; i < CCS_MAX_PATH_NUMBER_OPERATION; i++) |
1095 |
if (!len) { |
if (perm & (1 << i)) |
1096 |
head->read_step = 0; |
count++; |
1097 |
return 0; |
break; |
1098 |
} |
case CCS_TYPE_PATH_NUMBER3_ACL: |
1099 |
if ((buf = ccs_alloc(len)) != NULL) { |
perm = container_of(ptr, |
1100 |
pos = 0; |
struct ccs_path_number3_acl, |
1101 |
/***** CRITICAL SECTION START *****/ |
head)->perm; |
1102 |
spin_lock(&query_lock); |
for (i = 0; i < CCS_MAX_PATH_NUMBER3_OPERATION; |
1103 |
list_for_each(tmp, &query_list) { |
i++) |
1104 |
struct query_entry *ptr = list_entry(tmp, struct query_entry, list); |
if (perm & (1 << i)) |
1105 |
if (pos++ == head->read_step) { |
count++; |
|
/* Some query can be skiipped since query_list can change, but I don't care. */ |
|
|
if (len == ptr->query_len) memmove(buf, ptr->query, len); |
|
|
break; |
|
|
} |
|
|
} |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (buf[0]) { |
|
|
head->readbuf_size = head->read_avail = len; |
|
|
head->read_buf = buf; |
|
|
head->read_step++; |
|
|
} else { |
|
|
ccs_free(buf); |
|
|
} |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int WriteAnswer(struct io_buffer *head) |
|
|
{ |
|
|
char *data = head->write_buf; |
|
|
struct list_head *tmp; |
|
|
unsigned int serial, answer; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_lock); |
|
|
list_for_each(tmp, &query_list) { |
|
|
struct query_entry *ptr = list_entry(tmp, struct query_entry, list); |
|
|
ptr->timer = 0; |
|
|
} |
|
|
spin_unlock(&query_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (sscanf(data, "A%u=%u", &serial, &answer) != 2) return -EINVAL; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&query_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_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/************************* /proc INTERFACE HANDLER *************************/ |
|
|
|
|
|
/* Policy updates counter. */ |
|
|
static unsigned int updates_counter[MAX_CCS_UPDATES_COUNTER]; |
|
|
static spinlock_t updates_counter_lock = SPIN_LOCK_UNLOCKED; |
|
|
|
|
|
void UpdateCounter(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 *****/ |
|
|
} |
|
|
|
|
|
static int ReadUpdatesCounter(struct 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 *****/ |
|
|
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 = 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int ReadVersion(struct io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
if (io_printf(head, "1.5.2-pre") == 0) head->read_eof = 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int ReadMemoryCounter(struct io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
const int shared = GetMemoryUsedForSaveName(), private = GetMemoryUsedForElements(), dynamic = GetMemoryUsedForDynamic(); |
|
|
if (io_printf(head, "Shared: %10u\nPrivate: %10u\nDynamic: %10u\nTotal: %10u\n", shared, private, dynamic, shared + private + dynamic) == 0) head->read_eof = 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int ReadSelfDomain(struct io_buffer *head) |
|
|
{ |
|
|
if (!head->read_eof) { |
|
|
io_printf(head, "%s", current->domain_info->domainname->name); |
|
|
head->read_eof = 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
int CCS_OpenControl(const int type, struct file *file) |
|
|
{ |
|
|
struct io_buffer *head = ccs_alloc(sizeof(*head)); |
|
|
if (!head) return -ENOMEM; |
|
|
mutex_init(&head->read_sem); |
|
|
mutex_init(&head->write_sem); |
|
|
switch (type) { |
|
|
#ifdef CONFIG_SAKURA |
|
|
case CCS_SYSTEMPOLICY: |
|
|
head->write = AddSystemPolicy; |
|
|
head->read = ReadSystemPolicy; |
|
|
break; |
|
|
#endif |
|
|
#ifdef CONFIG_TOMOYO |
|
|
case CCS_DOMAINPOLICY: |
|
|
head->write = AddDomainPolicy; |
|
|
head->read = ReadDomainPolicy; |
|
|
break; |
|
|
case CCS_EXCEPTIONPOLICY: |
|
|
head->write = AddExceptionPolicy; |
|
|
head->read = ReadExceptionPolicy; |
|
|
break; |
|
|
case CCS_GRANTLOG: |
|
|
head->poll = PollGrantLog; |
|
|
head->read = ReadGrantLog; |
|
|
break; |
|
|
case CCS_REJECTLOG: |
|
|
head->poll = PollRejectLog; |
|
|
head->read = ReadRejectLog; |
|
|
break; |
|
|
#endif |
|
|
case CCS_SELFDOMAIN: |
|
|
head->read = ReadSelfDomain; |
|
|
break; |
|
|
case CCS_DOMAIN_STATUS: |
|
|
head->write = UpdateDomainProfile; |
|
|
head->read = ReadDomainProfile; |
|
|
break; |
|
|
case CCS_PROCESS_STATUS: |
|
|
head->write = WritePID; |
|
|
head->read = ReadPID; |
|
|
break; |
|
|
case CCS_VERSION: |
|
|
head->read = ReadVersion; |
|
|
head->readbuf_size = 128; |
|
|
break; |
|
|
case CCS_MEMINFO: |
|
|
head->read = ReadMemoryCounter; |
|
|
head->readbuf_size = 128; |
|
|
break; |
|
|
case CCS_PROFILE: |
|
|
head->write = SetProfile; |
|
|
head->read = ReadProfile; |
|
|
break; |
|
|
case CCS_QUERY: |
|
|
head->poll = PollQuery; |
|
|
head->write = WriteAnswer; |
|
|
head->read = ReadQuery; |
|
|
break; |
|
|
case CCS_MANAGER: |
|
|
head->write = AddManagerPolicy; |
|
|
head->read = ReadManagerPolicy; |
|
|
break; |
|
|
case CCS_UPDATESCOUNTER: |
|
|
head->read = ReadUpdatesCounter; |
|
|
break; |
|
|
} |
|
|
if (type != CCS_GRANTLOG && type != CCS_REJECTLOG && type != CCS_QUERY) { |
|
|
if (!head->readbuf_size) head->readbuf_size = PAGE_SIZE * 2; |
|
|
if ((head->read_buf = ccs_alloc(head->readbuf_size)) == NULL) { |
|
|
ccs_free(head); |
|
|
return -ENOMEM; |
|
|
} |
|
|
} |
|
|
if (head->write) { |
|
|
head->writebuf_size = PAGE_SIZE * 2; |
|
|
if ((head->write_buf = ccs_alloc(head->writebuf_size)) == NULL) { |
|
|
ccs_free(head->read_buf); |
|
|
ccs_free(head); |
|
|
return -ENOMEM; |
|
|
} |
|
|
} |
|
|
file->private_data = head; |
|
|
if (type == CCS_SELFDOMAIN) CCS_ReadControl(file, NULL, 0); |
|
|
else if (head->write == WriteAnswer) atomic_inc(&queryd_watcher); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
static int CopyToUser(struct io_buffer *head, char __user * buffer, int buffer_len) |
|
|
{ |
|
|
int len = head->read_avail; |
|
|
char *cp = head->read_buf; |
|
|
if (len > buffer_len) len = buffer_len; |
|
|
if (len) { |
|
|
if (copy_to_user(buffer, cp, len)) return -EFAULT; |
|
|
head->read_avail -= len; |
|
|
memmove(cp, cp + len, head->read_avail); |
|
|
} |
|
|
return len; |
|
|
} |
|
|
|
|
|
int CCS_PollControl(struct file *file, poll_table *wait) |
|
|
{ |
|
|
struct io_buffer *head = file->private_data; |
|
|
if (!head->poll) return -ENOSYS; |
|
|
return head->poll(file, wait); |
|
|
} |
|
|
|
|
|
int CCS_ReadControl(struct file *file, char __user *buffer, const int buffer_len) |
|
|
{ |
|
|
int len = 0; |
|
|
struct io_buffer *head = file->private_data; |
|
|
if (!head->read) return -ENOSYS; |
|
|
if (!access_ok(VERIFY_WRITE, buffer, buffer_len)) return -EFAULT; |
|
|
if (mutex_lock_interruptible(&head->read_sem)) return -EINTR; |
|
|
len = head->read(head); |
|
|
if (len >= 0) len = CopyToUser(head, buffer, buffer_len); |
|
|
mutex_unlock(&head->read_sem); |
|
|
return len; |
|
|
} |
|
|
|
|
|
int CCS_WriteControl(struct file *file, const char __user *buffer, const int buffer_len) |
|
|
{ |
|
|
struct 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; |
|
|
if (!isRoot()) return -EPERM; |
|
|
if (head->write != WritePID && !IsPolicyManager()) { |
|
|
return -EPERM; /* Forbid updating policies for non manager programs. */ |
|
|
} |
|
|
if (mutex_lock_interruptible(&head->write_sem)) return -EINTR; |
|
|
while (avail_len > 0) { |
|
|
char c; |
|
|
if (head->write_avail >= head->writebuf_size - 1) { |
|
|
error = -ENOMEM; |
|
1106 |
break; |
break; |
1107 |
} else if (get_user(c, buffer)) { |
case CCS_TYPE_IP_NETWORK_ACL: |
1108 |
error = -EFAULT; |
perm = container_of(ptr, struct ccs_ip_network_acl, |
1109 |
|
head)->perm; |
1110 |
|
for (i = 0; i < CCS_MAX_NETWORK_OPERATION; i++) |
1111 |
|
if (perm & (1 << i)) |
1112 |
|
count++; |
1113 |
break; |
break; |
1114 |
|
default: |
1115 |
|
count++; |
1116 |
} |
} |
1117 |
buffer++; avail_len--; |
} |
1118 |
cp0[head->write_avail++] = c; |
if (count < ccs_flags(domain, CCS_MAX_ACCEPT_ENTRY)) |
1119 |
if (c != '\n') continue; |
return true; |
1120 |
cp0[head->write_avail - 1] = '\0'; |
if (!domain->quota_warned) { |
1121 |
head->write_avail = 0; |
domain->quota_warned = true; |
1122 |
NormalizeLine(cp0); |
printk(KERN_WARNING "WARNING: " |
1123 |
head->write(head); |
"Domain '%s' has so many ACLs to hold. " |
1124 |
} |
"Stopped learning mode.\n", domain->domainname->name); |
1125 |
mutex_unlock(&head->write_sem); |
} |
1126 |
return error; |
return false; |
|
} |
|
|
|
|
|
|
|
|
int CCS_CloseControl(struct file *file) |
|
|
{ |
|
|
struct io_buffer *head = file->private_data; |
|
|
if (head->write == WriteAnswer) atomic_dec(&queryd_watcher); |
|
|
else if (head->read == ReadMemoryCounter) profile_loaded = 1; |
|
|
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; |
|
1127 |
} |
} |