From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/security/tomoyo/util.c | 1090 ---------------------------------- 1 file changed, 1090 deletions(-) delete mode 100644 ANDROID_3.4.5/security/tomoyo/util.c (limited to 'ANDROID_3.4.5/security/tomoyo/util.c') 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 -#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; -} -- cgit