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-rw-r--r--ANDROID_3.4.5/security/tomoyo/util.c1090
1 files changed, 0 insertions, 1090 deletions
diff --git a/ANDROID_3.4.5/security/tomoyo/util.c b/ANDROID_3.4.5/security/tomoyo/util.c
deleted file mode 100644
index 867558c9..00000000
--- a/ANDROID_3.4.5/security/tomoyo/util.c
+++ /dev/null
@@ -1,1090 +0,0 @@
-/*
- * security/tomoyo/util.c
- *
- * Copyright (C) 2005-2011 NTT DATA CORPORATION
- */
-
-#include <linux/slab.h>
-#include "common.h"
-
-/* Lock for protecting policy. */
-DEFINE_MUTEX(tomoyo_policy_lock);
-
-/* Has /sbin/init started? */
-bool tomoyo_policy_loaded;
-
-/*
- * Mapping table from "enum tomoyo_mac_index" to
- * "enum tomoyo_mac_category_index".
- */
-const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX] = {
- /* CONFIG::file group */
- [TOMOYO_MAC_FILE_EXECUTE] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_OPEN] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_CREATE] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_UNLINK] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_GETATTR] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MKDIR] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_RMDIR] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MKFIFO] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MKSOCK] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_TRUNCATE] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_SYMLINK] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MKBLOCK] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MKCHAR] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_LINK] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_RENAME] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_CHMOD] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_CHOWN] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_CHGRP] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_IOCTL] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_CHROOT] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_MOUNT] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_UMOUNT] = TOMOYO_MAC_CATEGORY_FILE,
- [TOMOYO_MAC_FILE_PIVOT_ROOT] = TOMOYO_MAC_CATEGORY_FILE,
- /* CONFIG::network group */
- [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_RAW_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_INET_RAW_SEND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] =
- TOMOYO_MAC_CATEGORY_NETWORK,
- /* CONFIG::misc group */
- [TOMOYO_MAC_ENVIRON] = TOMOYO_MAC_CATEGORY_MISC,
-};
-
-/**
- * tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
- *
- * @time: Seconds since 1970/01/01 00:00:00.
- * @stamp: Pointer to "struct tomoyo_time".
- *
- * Returns nothing.
- *
- * This function does not handle Y2038 problem.
- */
-void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp)
-{
- static const u16 tomoyo_eom[2][12] = {
- { 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
- { 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
- };
- u16 y;
- u8 m;
- bool r;
- stamp->sec = time % 60;
- time /= 60;
- stamp->min = time % 60;
- time /= 60;
- stamp->hour = time % 24;
- time /= 24;
- for (y = 1970; ; y++) {
- const unsigned short days = (y & 3) ? 365 : 366;
- if (time < days)
- break;
- time -= days;
- }
- r = (y & 3) == 0;
- for (m = 0; m < 11 && time >= tomoyo_eom[r][m]; m++)
- ;
- if (m)
- time -= tomoyo_eom[r][m - 1];
- stamp->year = y;
- stamp->month = ++m;
- stamp->day = ++time;
-}
-
-/**
- * tomoyo_permstr - Find permission keywords.
- *
- * @string: String representation for permissions in foo/bar/buz format.
- * @keyword: Keyword to find from @string/
- *
- * Returns ture if @keyword was found in @string, false otherwise.
- *
- * This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2.
- */
-bool tomoyo_permstr(const char *string, const char *keyword)
-{
- const char *cp = strstr(string, keyword);
- if (cp)
- return cp == string || *(cp - 1) == '/';
- return false;
-}
-
-/**
- * tomoyo_read_token - Read a word from a line.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- *
- * Returns a word on success, "" otherwise.
- *
- * To allow the caller to skip NULL check, this function returns "" rather than
- * NULL if there is no more words to read.
- */
-char *tomoyo_read_token(struct tomoyo_acl_param *param)
-{
- char *pos = param->data;
- char *del = strchr(pos, ' ');
- if (del)
- *del++ = '\0';
- else
- del = pos + strlen(pos);
- param->data = del;
- return pos;
-}
-
-/**
- * tomoyo_get_domainname - Read a domainname from a line.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- *
- * Returns a domainname on success, NULL otherwise.
- */
-const struct tomoyo_path_info *tomoyo_get_domainname
-(struct tomoyo_acl_param *param)
-{
- char *start = param->data;
- char *pos = start;
- while (*pos) {
- if (*pos++ != ' ' || *pos++ == '/')
- continue;
- pos -= 2;
- *pos++ = '\0';
- break;
- }
- param->data = pos;
- if (tomoyo_correct_domain(start))
- return tomoyo_get_name(start);
- return NULL;
-}
-
-/**
- * tomoyo_parse_ulong - Parse an "unsigned long" value.
- *
- * @result: Pointer to "unsigned long".
- * @str: Pointer to string to parse.
- *
- * Returns one of values in "enum tomoyo_value_type".
- *
- * The @src is updated to point the first character after the value
- * on success.
- */
-u8 tomoyo_parse_ulong(unsigned long *result, char **str)
-{
- const char *cp = *str;
- char *ep;
- int base = 10;
- if (*cp == '0') {
- char c = *(cp + 1);
- if (c == 'x' || c == 'X') {
- base = 16;
- cp += 2;
- } else if (c >= '0' && c <= '7') {
- base = 8;
- cp++;
- }
- }
- *result = simple_strtoul(cp, &ep, base);
- if (cp == ep)
- return TOMOYO_VALUE_TYPE_INVALID;
- *str = ep;
- switch (base) {
- case 16:
- return TOMOYO_VALUE_TYPE_HEXADECIMAL;
- case 8:
- return TOMOYO_VALUE_TYPE_OCTAL;
- default:
- return TOMOYO_VALUE_TYPE_DECIMAL;
- }
-}
-
-/**
- * tomoyo_print_ulong - Print an "unsigned long" value.
- *
- * @buffer: Pointer to buffer.
- * @buffer_len: Size of @buffer.
- * @value: An "unsigned long" value.
- * @type: Type of @value.
- *
- * Returns nothing.
- */
-void tomoyo_print_ulong(char *buffer, const int buffer_len,
- const unsigned long value, const u8 type)
-{
- if (type == TOMOYO_VALUE_TYPE_DECIMAL)
- snprintf(buffer, buffer_len, "%lu", value);
- else if (type == TOMOYO_VALUE_TYPE_OCTAL)
- snprintf(buffer, buffer_len, "0%lo", value);
- else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
- snprintf(buffer, buffer_len, "0x%lX", value);
- else
- snprintf(buffer, buffer_len, "type(%u)", type);
-}
-
-/**
- * tomoyo_parse_name_union - Parse a tomoyo_name_union.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- * @ptr: Pointer to "struct tomoyo_name_union".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
- struct tomoyo_name_union *ptr)
-{
- char *filename;
- if (param->data[0] == '@') {
- param->data++;
- ptr->group = tomoyo_get_group(param, TOMOYO_PATH_GROUP);
- return ptr->group != NULL;
- }
- filename = tomoyo_read_token(param);
- if (!tomoyo_correct_word(filename))
- return false;
- ptr->filename = tomoyo_get_name(filename);
- return ptr->filename != NULL;
-}
-
-/**
- * tomoyo_parse_number_union - Parse a tomoyo_number_union.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- * @ptr: Pointer to "struct tomoyo_number_union".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
- struct tomoyo_number_union *ptr)
-{
- char *data;
- u8 type;
- unsigned long v;
- memset(ptr, 0, sizeof(*ptr));
- if (param->data[0] == '@') {
- param->data++;
- ptr->group = tomoyo_get_group(param, TOMOYO_NUMBER_GROUP);
- return ptr->group != NULL;
- }
- data = tomoyo_read_token(param);
- type = tomoyo_parse_ulong(&v, &data);
- if (type == TOMOYO_VALUE_TYPE_INVALID)
- return false;
- ptr->values[0] = v;
- ptr->value_type[0] = type;
- if (!*data) {
- ptr->values[1] = v;
- ptr->value_type[1] = type;
- return true;
- }
- if (*data++ != '-')
- return false;
- type = tomoyo_parse_ulong(&v, &data);
- if (type == TOMOYO_VALUE_TYPE_INVALID || *data || ptr->values[0] > v)
- return false;
- ptr->values[1] = v;
- ptr->value_type[1] = type;
- return true;
-}
-
-/**
- * tomoyo_byte_range - Check whether the string is a \ooo style octal value.
- *
- * @str: Pointer to the string.
- *
- * Returns true if @str is a \ooo style octal value, false otherwise.
- *
- * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
- * This function verifies that \ooo is in valid range.
- */
-static inline bool tomoyo_byte_range(const char *str)
-{
- return *str >= '0' && *str++ <= '3' &&
- *str >= '0' && *str++ <= '7' &&
- *str >= '0' && *str <= '7';
-}
-
-/**
- * tomoyo_alphabet_char - Check whether the character is an alphabet.
- *
- * @c: The character to check.
- *
- * Returns true if @c is an alphabet character, false otherwise.
- */
-static inline bool tomoyo_alphabet_char(const char c)
-{
- return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
-}
-
-/**
- * tomoyo_make_byte - Make byte value from three octal characters.
- *
- * @c1: The first character.
- * @c2: The second character.
- * @c3: The third character.
- *
- * Returns byte value.
- */
-static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
-{
- return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
-}
-
-/**
- * tomoyo_valid - Check whether the character is a valid char.
- *
- * @c: The character to check.
- *
- * Returns true if @c is a valid character, false otherwise.
- */
-static inline bool tomoyo_valid(const unsigned char c)
-{
- return c > ' ' && c < 127;
-}
-
-/**
- * tomoyo_invalid - Check whether the character is an invalid char.
- *
- * @c: The character to check.
- *
- * Returns true if @c is an invalid character, false otherwise.
- */
-static inline bool tomoyo_invalid(const unsigned char c)
-{
- return c && (c <= ' ' || c >= 127);
-}
-
-/**
- * tomoyo_str_starts - Check whether the given string starts with the given keyword.
- *
- * @src: Pointer to pointer to the string.
- * @find: Pointer to the keyword.
- *
- * Returns true if @src starts with @find, false otherwise.
- *
- * The @src is updated to point the first character after the @find
- * if @src starts with @find.
- */
-bool tomoyo_str_starts(char **src, const char *find)
-{
- const int len = strlen(find);
- char *tmp = *src;
-
- if (strncmp(tmp, find, len))
- return false;
- tmp += len;
- *src = tmp;
- return true;
-}
-
-/**
- * tomoyo_normalize_line - Format string.
- *
- * @buffer: The line to normalize.
- *
- * Leading and trailing whitespaces are removed.
- * Multiple whitespaces are packed into single space.
- *
- * Returns nothing.
- */
-void tomoyo_normalize_line(unsigned char *buffer)
-{
- unsigned char *sp = buffer;
- unsigned char *dp = buffer;
- bool first = true;
-
- while (tomoyo_invalid(*sp))
- sp++;
- while (*sp) {
- if (!first)
- *dp++ = ' ';
- first = false;
- while (tomoyo_valid(*sp))
- *dp++ = *sp++;
- while (tomoyo_invalid(*sp))
- sp++;
- }
- *dp = '\0';
-}
-
-/**
- * tomoyo_correct_word2 - Validate a string.
- *
- * @string: The string to check. Maybe non-'\0'-terminated.
- * @len: Length of @string.
- *
- * Check whether the given string follows the naming rules.
- * Returns true if @string follows the naming rules, false otherwise.
- */
-static bool tomoyo_correct_word2(const char *string, size_t len)
-{
- const char *const start = string;
- bool in_repetition = false;
- unsigned char c;
- unsigned char d;
- unsigned char e;
- if (!len)
- goto out;
- while (len--) {
- c = *string++;
- if (c == '\\') {
- if (!len--)
- goto out;
- c = *string++;
- switch (c) {
- case '\\': /* "\\" */
- continue;
- case '$': /* "\$" */
- case '+': /* "\+" */
- case '?': /* "\?" */
- case '*': /* "\*" */
- case '@': /* "\@" */
- case 'x': /* "\x" */
- case 'X': /* "\X" */
- case 'a': /* "\a" */
- case 'A': /* "\A" */
- case '-': /* "\-" */
- continue;
- case '{': /* "/\{" */
- if (string - 3 < start || *(string - 3) != '/')
- break;
- in_repetition = true;
- continue;
- case '}': /* "\}/" */
- if (*string != '/')
- break;
- if (!in_repetition)
- break;
- in_repetition = false;
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- if (!len-- || !len--)
- break;
- d = *string++;
- e = *string++;
- if (d < '0' || d > '7' || e < '0' || e > '7')
- break;
- c = tomoyo_make_byte(c, d, e);
- if (c <= ' ' || c >= 127)
- continue;
- }
- goto out;
- } else if (in_repetition && c == '/') {
- goto out;
- } else if (c <= ' ' || c >= 127) {
- goto out;
- }
- }
- if (in_repetition)
- goto out;
- return true;
- out:
- return false;
-}
-
-/**
- * tomoyo_correct_word - Validate a string.
- *
- * @string: The string to check.
- *
- * Check whether the given string follows the naming rules.
- * Returns true if @string follows the naming rules, false otherwise.
- */
-bool tomoyo_correct_word(const char *string)
-{
- return tomoyo_correct_word2(string, strlen(string));
-}
-
-/**
- * tomoyo_correct_path - Validate a pathname.
- *
- * @filename: The pathname to check.
- *
- * Check whether the given pathname follows the naming rules.
- * Returns true if @filename follows the naming rules, false otherwise.
- */
-bool tomoyo_correct_path(const char *filename)
-{
- return *filename == '/' && tomoyo_correct_word(filename);
-}
-
-/**
- * tomoyo_correct_domain - Check whether the given domainname follows the naming rules.
- *
- * @domainname: The domainname to check.
- *
- * Returns true if @domainname follows the naming rules, false otherwise.
- */
-bool tomoyo_correct_domain(const unsigned char *domainname)
-{
- if (!domainname || !tomoyo_domain_def(domainname))
- return false;
- domainname = strchr(domainname, ' ');
- if (!domainname++)
- return true;
- while (1) {
- const unsigned char *cp = strchr(domainname, ' ');
- if (!cp)
- break;
- if (*domainname != '/' ||
- !tomoyo_correct_word2(domainname, cp - domainname))
- return false;
- domainname = cp + 1;
- }
- return tomoyo_correct_path(domainname);
-}
-
-/**
- * tomoyo_domain_def - Check whether the given token can be a domainname.
- *
- * @buffer: The token to check.
- *
- * Returns true if @buffer possibly be a domainname, false otherwise.
- */
-bool tomoyo_domain_def(const unsigned char *buffer)
-{
- const unsigned char *cp;
- int len;
- if (*buffer != '<')
- return false;
- cp = strchr(buffer, ' ');
- if (!cp)
- len = strlen(buffer);
- else
- len = cp - buffer;
- if (buffer[len - 1] != '>' ||
- !tomoyo_correct_word2(buffer + 1, len - 2))
- return false;
- return true;
-}
-
-/**
- * tomoyo_find_domain - Find a domain by the given name.
- *
- * @domainname: The domainname to find.
- *
- * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
-{
- struct tomoyo_domain_info *domain;
- struct tomoyo_path_info name;
-
- name.name = domainname;
- tomoyo_fill_path_info(&name);
- list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
- if (!domain->is_deleted &&
- !tomoyo_pathcmp(&name, domain->domainname))
- return domain;
- }
- return NULL;
-}
-
-/**
- * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
- *
- * @filename: The string to evaluate.
- *
- * Returns the initial length without a pattern in @filename.
- */
-static int tomoyo_const_part_length(const char *filename)
-{
- char c;
- int len = 0;
-
- if (!filename)
- return 0;
- while ((c = *filename++) != '\0') {
- if (c != '\\') {
- len++;
- continue;
- }
- c = *filename++;
- switch (c) {
- case '\\': /* "\\" */
- len += 2;
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- c = *filename++;
- if (c < '0' || c > '7')
- break;
- c = *filename++;
- if (c < '0' || c > '7')
- break;
- len += 4;
- continue;
- }
- break;
- }
- return len;
-}
-
-/**
- * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
- *
- * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
- *
- * The caller sets "struct tomoyo_path_info"->name.
- */
-void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
-{
- const char *name = ptr->name;
- const int len = strlen(name);
-
- ptr->const_len = tomoyo_const_part_length(name);
- ptr->is_dir = len && (name[len - 1] == '/');
- ptr->is_patterned = (ptr->const_len < len);
- ptr->hash = full_name_hash(name, len);
-}
-
-/**
- * tomoyo_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
- *
- * @filename: The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern: The start of pattern to compare.
- * @pattern_end: The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern2(const char *filename,
- const char *filename_end,
- const char *pattern,
- const char *pattern_end)
-{
- while (filename < filename_end && pattern < pattern_end) {
- char c;
- if (*pattern != '\\') {
- if (*filename++ != *pattern++)
- return false;
- continue;
- }
- c = *filename;
- pattern++;
- switch (*pattern) {
- int i;
- int j;
- case '?':
- if (c == '/') {
- return false;
- } else if (c == '\\') {
- if (filename[1] == '\\')
- filename++;
- else if (tomoyo_byte_range(filename + 1))
- filename += 3;
- else
- return false;
- }
- break;
- case '\\':
- if (c != '\\')
- return false;
- if (*++filename != '\\')
- return false;
- break;
- case '+':
- if (!isdigit(c))
- return false;
- break;
- case 'x':
- if (!isxdigit(c))
- return false;
- break;
- case 'a':
- if (!tomoyo_alphabet_char(c))
- return false;
- break;
- case '0':
- case '1':
- case '2':
- case '3':
- if (c == '\\' && tomoyo_byte_range(filename + 1)
- && strncmp(filename + 1, pattern, 3) == 0) {
- filename += 3;
- pattern += 2;
- break;
- }
- return false; /* Not matched. */
- case '*':
- case '@':
- for (i = 0; i <= filename_end - filename; i++) {
- if (tomoyo_file_matches_pattern2(
- filename + i, filename_end,
- pattern + 1, pattern_end))
- return true;
- c = filename[i];
- if (c == '.' && *pattern == '@')
- break;
- if (c != '\\')
- continue;
- if (filename[i + 1] == '\\')
- i++;
- else if (tomoyo_byte_range(filename + i + 1))
- i += 3;
- else
- break; /* Bad pattern. */
- }
- return false; /* Not matched. */
- default:
- j = 0;
- c = *pattern;
- if (c == '$') {
- while (isdigit(filename[j]))
- j++;
- } else if (c == 'X') {
- while (isxdigit(filename[j]))
- j++;
- } else if (c == 'A') {
- while (tomoyo_alphabet_char(filename[j]))
- j++;
- }
- for (i = 1; i <= j; i++) {
- if (tomoyo_file_matches_pattern2(
- filename + i, filename_end,
- pattern + 1, pattern_end))
- return true;
- }
- return false; /* Not matched or bad pattern. */
- }
- filename++;
- pattern++;
- }
- while (*pattern == '\\' &&
- (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
- pattern += 2;
- return filename == filename_end && pattern == pattern_end;
-}
-
-/**
- * tomoyo_file_matches_pattern - Pattern matching without '/' character.
- *
- * @filename: The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern: The start of pattern to compare.
- * @pattern_end: The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern(const char *filename,
- const char *filename_end,
- const char *pattern,
- const char *pattern_end)
-{
- const char *pattern_start = pattern;
- bool first = true;
- bool result;
-
- while (pattern < pattern_end - 1) {
- /* Split at "\-" pattern. */
- if (*pattern++ != '\\' || *pattern++ != '-')
- continue;
- result = tomoyo_file_matches_pattern2(filename,
- filename_end,
- pattern_start,
- pattern - 2);
- if (first)
- result = !result;
- if (result)
- return false;
- first = false;
- pattern_start = pattern;
- }
- result = tomoyo_file_matches_pattern2(filename, filename_end,
- pattern_start, pattern_end);
- return first ? result : !result;
-}
-
-/**
- * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
- *
- * @f: The start of string to check.
- * @p: The start of pattern to compare.
- *
- * Returns true if @f matches @p, false otherwise.
- */
-static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
-{
- const char *f_delimiter;
- const char *p_delimiter;
-
- while (*f && *p) {
- f_delimiter = strchr(f, '/');
- if (!f_delimiter)
- f_delimiter = f + strlen(f);
- p_delimiter = strchr(p, '/');
- if (!p_delimiter)
- p_delimiter = p + strlen(p);
- if (*p == '\\' && *(p + 1) == '{')
- goto recursive;
- if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
- p_delimiter))
- return false;
- f = f_delimiter;
- if (*f)
- f++;
- p = p_delimiter;
- if (*p)
- p++;
- }
- /* Ignore trailing "\*" and "\@" in @pattern. */
- while (*p == '\\' &&
- (*(p + 1) == '*' || *(p + 1) == '@'))
- p += 2;
- return !*f && !*p;
- recursive:
- /*
- * The "\{" pattern is permitted only after '/' character.
- * This guarantees that below "*(p - 1)" is safe.
- * Also, the "\}" pattern is permitted only before '/' character
- * so that "\{" + "\}" pair will not break the "\-" operator.
- */
- if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
- *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
- return false; /* Bad pattern. */
- do {
- /* Compare current component with pattern. */
- if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
- p_delimiter - 2))
- break;
- /* Proceed to next component. */
- f = f_delimiter;
- if (!*f)
- break;
- f++;
- /* Continue comparison. */
- if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
- return true;
- f_delimiter = strchr(f, '/');
- } while (f_delimiter);
- return false; /* Not matched. */
-}
-
-/**
- * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
- *
- * @filename: The filename to check.
- * @pattern: The pattern to compare.
- *
- * Returns true if matches, false otherwise.
- *
- * The following patterns are available.
- * \\ \ itself.
- * \ooo Octal representation of a byte.
- * \* Zero or more repetitions of characters other than '/'.
- * \@ Zero or more repetitions of characters other than '/' or '.'.
- * \? 1 byte character other than '/'.
- * \$ One or more repetitions of decimal digits.
- * \+ 1 decimal digit.
- * \X One or more repetitions of hexadecimal digits.
- * \x 1 hexadecimal digit.
- * \A One or more repetitions of alphabet characters.
- * \a 1 alphabet character.
- *
- * \- Subtraction operator.
- *
- * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
- * /dir/dir/dir/ ).
- */
-bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
- const struct tomoyo_path_info *pattern)
-{
- const char *f = filename->name;
- const char *p = pattern->name;
- const int len = pattern->const_len;
-
- /* If @pattern doesn't contain pattern, I can use strcmp(). */
- if (!pattern->is_patterned)
- return !tomoyo_pathcmp(filename, pattern);
- /* Don't compare directory and non-directory. */
- if (filename->is_dir != pattern->is_dir)
- return false;
- /* Compare the initial length without patterns. */
- if (strncmp(f, p, len))
- return false;
- f += len;
- p += len;
- return tomoyo_path_matches_pattern2(f, p);
-}
-
-/**
- * tomoyo_get_exe - Get tomoyo_realpath() of current process.
- *
- * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
- *
- * This function uses kzalloc(), so the caller must call kfree()
- * if this function didn't return NULL.
- */
-const char *tomoyo_get_exe(void)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- const char *cp = NULL;
-
- if (!mm)
- return NULL;
- down_read(&mm->mmap_sem);
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
- if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
- cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
- break;
- }
- }
- up_read(&mm->mmap_sem);
- return cp;
-}
-
-/**
- * tomoyo_get_mode - Get MAC mode.
- *
- * @ns: Pointer to "struct tomoyo_policy_namespace".
- * @profile: Profile number.
- * @index: Index number of functionality.
- *
- * Returns mode.
- */
-int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
- const u8 index)
-{
- u8 mode;
- struct tomoyo_profile *p;
-
- if (!tomoyo_policy_loaded)
- return TOMOYO_CONFIG_DISABLED;
- p = tomoyo_profile(ns, profile);
- mode = p->config[index];
- if (mode == TOMOYO_CONFIG_USE_DEFAULT)
- mode = p->config[tomoyo_index2category[index]
- + TOMOYO_MAX_MAC_INDEX];
- if (mode == TOMOYO_CONFIG_USE_DEFAULT)
- mode = p->default_config;
- return mode & 3;
-}
-
-/**
- * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
- *
- * @r: Pointer to "struct tomoyo_request_info" to initialize.
- * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
- * @index: Index number of functionality.
- *
- * Returns mode.
- */
-int tomoyo_init_request_info(struct tomoyo_request_info *r,
- struct tomoyo_domain_info *domain, const u8 index)
-{
- u8 profile;
- memset(r, 0, sizeof(*r));
- if (!domain)
- domain = tomoyo_domain();
- r->domain = domain;
- profile = domain->profile;
- r->profile = profile;
- r->type = index;
- r->mode = tomoyo_get_mode(domain->ns, profile, index);
- return r->mode;
-}
-
-/**
- * tomoyo_domain_quota_is_ok - Check for domain's quota.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- *
- * Returns true if the domain is not exceeded quota, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
-{
- unsigned int count = 0;
- struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
-
- if (r->mode != TOMOYO_CONFIG_LEARNING)
- return false;
- if (!domain)
- return true;
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- u16 perm;
- u8 i;
- if (ptr->is_deleted)
- continue;
- switch (ptr->type) {
- case TOMOYO_TYPE_PATH_ACL:
- perm = container_of(ptr, struct tomoyo_path_acl, head)
- ->perm;
- break;
- case TOMOYO_TYPE_PATH2_ACL:
- perm = container_of(ptr, struct tomoyo_path2_acl, head)
- ->perm;
- break;
- case TOMOYO_TYPE_PATH_NUMBER_ACL:
- perm = container_of(ptr, struct tomoyo_path_number_acl,
- head)->perm;
- break;
- case TOMOYO_TYPE_MKDEV_ACL:
- perm = container_of(ptr, struct tomoyo_mkdev_acl,
- head)->perm;
- break;
- case TOMOYO_TYPE_INET_ACL:
- perm = container_of(ptr, struct tomoyo_inet_acl,
- head)->perm;
- break;
- case TOMOYO_TYPE_UNIX_ACL:
- perm = container_of(ptr, struct tomoyo_unix_acl,
- head)->perm;
- break;
- case TOMOYO_TYPE_MANUAL_TASK_ACL:
- perm = 0;
- break;
- default:
- perm = 1;
- }
- for (i = 0; i < 16; i++)
- if (perm & (1 << i))
- count++;
- }
- if (count < tomoyo_profile(domain->ns, domain->profile)->
- pref[TOMOYO_PREF_MAX_LEARNING_ENTRY])
- return true;
- if (!domain->flags[TOMOYO_DIF_QUOTA_WARNED]) {
- domain->flags[TOMOYO_DIF_QUOTA_WARNED] = true;
- /* r->granted = false; */
- tomoyo_write_log(r, "%s", tomoyo_dif[TOMOYO_DIF_QUOTA_WARNED]);
- printk(KERN_WARNING "WARNING: "
- "Domain '%s' has too many ACLs to hold. "
- "Stopped learning mode.\n", domain->domainname->name);
- }
- return false;
-}
generated by cgit (git 2.34.1) at 2024-12-20 17:54:12 +0000