Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/auth/passdb-cache.c @ 5259:228eacfb2647 HEAD

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Added more debug logging.
author Timo Sirainen <tss@iki.fi>
date Sat, 10 Mar 2007 15:24:15 +0200
parents 83f361144a8a
children 6c48466c23fa
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1 /* Copyright (C) 2004 Timo Sirainen */
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2
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3 #include "common.h"
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4 #include "password-scheme.h"
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5 #include "passdb.h"
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6 #include "passdb-cache.h"
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7
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8 #include <stdlib.h>
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9
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10 struct auth_cache *passdb_cache = NULL;
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11
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12 bool passdb_cache_verify_plain(struct auth_request *request, const char *key,
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13 const char *password,
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14 enum passdb_result *result_r, int use_expired)
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15 {
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16 const char *value, *cached_pw, *scheme, *const *list;
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17 struct auth_cache_node *node;
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18 int ret;
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19 bool expired;
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20
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21 if (passdb_cache == NULL || key == NULL)
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22 return FALSE;
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23
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24 /* value = password \t ... */
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25 value = auth_cache_lookup(passdb_cache, request, key, &node, &expired);
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26 if (value == NULL || (expired && !use_expired)) {
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27 auth_request_log_debug(request, "cache",
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28 value == NULL ? "miss" : "expired");
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29 return FALSE;
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30 }
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31 auth_request_log_debug(request, "cache", "hit");
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32
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33 if (*value == '\0') {
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34 /* negative cache entry */
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35 auth_request_log_info(request, "cache", "User unknown");
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36 *result_r = PASSDB_RESULT_USER_UNKNOWN;
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37 return TRUE;
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38 }
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39
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40 list = t_strsplit(value, "\t");
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41
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42 cached_pw = list[0];
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43 if (*cached_pw == '\0') {
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44 /* NULL password */
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45 auth_request_log_info(request, "cache", "NULL password access");
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46 ret = 1;
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47 } else {
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48 scheme = password_get_scheme(&cached_pw);
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49 i_assert(scheme != NULL);
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50
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51 ret = auth_request_password_verify(request, password, cached_pw,
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52 scheme, "cache");
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53
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54 if (ret == 0 && node->last_success) {
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55 /* the last authentication was successful. assume that
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56 the password was changed and cache is expired. */
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57 node->last_success = FALSE;
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58 return FALSE;
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59 }
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60 }
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61 node->last_success = ret > 0;
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62
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63 /* save the extra_fields only after we know we're using the
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64 cached data */
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65 auth_request_set_fields(request, list + 1, NULL);
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66
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67 *result_r = ret > 0 ? PASSDB_RESULT_OK :
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68 PASSDB_RESULT_PASSWORD_MISMATCH;
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69 return TRUE;
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70 }
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71
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72 bool passdb_cache_lookup_credentials(struct auth_request *request,
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73 const char *key, const char **password_r,
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74 const char **scheme_r,
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75 enum passdb_result *result_r,
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76 bool use_expired)
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77 {
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78 const char *value, *const *list;
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79 struct auth_cache_node *node;
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80 bool expired;
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81
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82 if (passdb_cache == NULL)
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83 return FALSE;
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84
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85 value = auth_cache_lookup(passdb_cache, request, key, &node, &expired);
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86 if (value == NULL || (expired && !use_expired)) {
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87 auth_request_log_debug(request, "cache",
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88 value == NULL ? "miss" : "expired");
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89 return FALSE;
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90 }
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91 auth_request_log_debug(request, "cache", "hit");
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92
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93 if (*value == '\0') {
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94 /* negative cache entry */
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95 *result_r = PASSDB_RESULT_USER_UNKNOWN;
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96 *password_r = NULL;
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97 *scheme_r = NULL;
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98 return TRUE;
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99 }
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100
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101 list = t_strsplit(value, "\t");
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102 auth_request_set_fields(request, list + 1, NULL);
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103
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104 *result_r = PASSDB_RESULT_OK;
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105 *password_r = list[0];
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106 *scheme_r = password_get_scheme(password_r);
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107 i_assert(*scheme_r != NULL || *password_r == '\0');
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108
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109 if (*password_r == '\0') {
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110 *password_r = NULL;
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111 *result_r = PASSDB_RESULT_SCHEME_NOT_AVAILABLE;
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112 }
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113 return TRUE;
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114 }
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115
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116 void passdb_cache_init(void)
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117 {
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118 const char *env;
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119 size_t max_size;
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120 unsigned int cache_ttl;
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121
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122 env = getenv("CACHE_SIZE");
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123 if (env == NULL)
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124 return;
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125
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126 max_size = (size_t)strtoul(env, NULL, 10) * 1024;
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127 if (max_size == 0)
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128 return;
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129
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130 env = getenv("CACHE_TTL");
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131 if (env == NULL)
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132 return;
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133
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134 cache_ttl = (unsigned int)strtoul(env, NULL, 10);
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135 if (cache_ttl == 0)
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136 return;
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137
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138 passdb_cache = auth_cache_new(max_size, cache_ttl);
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139 }
54b29901a793 Added simple LRU cache for auth requests. Currently only for sql passdb.
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140
54b29901a793 Added simple LRU cache for auth requests. Currently only for sql passdb.
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141 void passdb_cache_deinit(void)
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142 {
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253fae0aa95f Don't try to free cache if it doesn't exist.
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143 if (passdb_cache != NULL)
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928229f8b3e6 deinit, unref, destroy, close, free, etc. functions now take a pointer to
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144 auth_cache_free(&passdb_cache);
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145 }