1 | /** |
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2 | * Copyright 2004-2005 Paul Querna |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | * |
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16 | */ |
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17 | |
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18 | #include "mod_gnutls.h" |
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19 | |
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20 | #if HAVE_APR_MEMCACHE |
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21 | #include "apr_memcache.h" |
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22 | #endif |
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23 | |
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24 | #include "apr_dbm.h" |
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25 | |
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26 | #include "ap_mpm.h" |
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27 | |
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28 | #include <unistd.h> |
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29 | #include <sys/types.h> |
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30 | |
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31 | #if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE) |
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32 | #include "unixd.h" |
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33 | #endif |
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34 | |
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35 | #define GNUTLS_SESSION_ID_STRING_LEN \ |
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36 | ((GNUTLS_MAX_SESSION_ID + 1) * 2) |
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37 | #define MC_TAG "mod_gnutls:" |
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38 | #define MC_TAG_LEN \ |
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39 | (sizeof(MC_TAG)) |
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40 | #define STR_SESSION_LEN (GNUTLS_SESSION_ID_STRING_LEN + MC_TAG_LEN) |
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41 | |
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42 | static char *gnutls_session_id2sz(unsigned char *id, int idlen, |
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43 | char *str, int strsize) |
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44 | { |
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45 | char *cp; |
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46 | int n; |
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47 | |
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48 | cp = apr_cpystrn(str, MC_TAG, MC_TAG_LEN); |
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49 | for (n = 0; n < idlen && n < GNUTLS_MAX_SESSION_ID; n++) { |
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50 | apr_snprintf(cp, strsize - (cp-str), "%02X", id[n]); |
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51 | cp += 2; |
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52 | } |
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53 | *cp = '\0'; |
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54 | return str; |
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55 | } |
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56 | |
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57 | |
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58 | #if HAVE_APR_MEMCACHE |
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59 | |
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60 | /** |
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61 | * GnuTLS Session Cache using libmemcached |
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62 | * |
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63 | */ |
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64 | |
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65 | /* The underlying apr_memcache system is thread safe... woohoo */ |
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66 | static apr_memcache_t* mc; |
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67 | |
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68 | int mc_cache_child_init(apr_pool_t *p, server_rec *s, |
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69 | mod_gnutls_srvconf_rec *sc) |
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70 | { |
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71 | apr_status_t rv = APR_SUCCESS; |
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72 | int thread_limit = 0; |
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73 | int nservers = 0; |
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74 | char* cache_config; |
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75 | char* split; |
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76 | char* tok; |
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77 | |
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78 | ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &thread_limit); |
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79 | |
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80 | /* Find all the servers in the first run to get a total count */ |
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81 | cache_config = apr_pstrdup(p, sc->cache_config); |
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82 | split = apr_strtok(cache_config, " ", &tok); |
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83 | while (split) { |
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84 | nservers++; |
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85 | split = apr_strtok(NULL," ", &tok); |
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86 | } |
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87 | |
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88 | rv = apr_memcache_create(p, nservers, 0, &mc); |
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89 | if (rv != APR_SUCCESS) { |
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90 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, |
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91 | "[gnutls_cache] Failed to create Memcache Object of '%d' size.", |
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92 | nservers); |
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93 | return rv; |
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94 | } |
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95 | |
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96 | /* Now add each server to the memcache */ |
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97 | cache_config = apr_pstrdup(p, sc->cache_config); |
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98 | split = apr_strtok(cache_config, " ", &tok); |
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99 | while (split) { |
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100 | apr_memcache_server_t* st; |
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101 | char* host_str; |
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102 | char* scope_id; |
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103 | apr_port_t port; |
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104 | |
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105 | rv = apr_parse_addr_port(&host_str, &scope_id, &port, split, p); |
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106 | if(rv != APR_SUCCESS) { |
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107 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, |
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108 | "[gnutls_cache] Failed to Parse Server: '%s'", split); |
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109 | return rv; |
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110 | } |
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111 | |
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112 | if(host_str == NULL) { |
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113 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, |
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114 | "[gnutls_cache] Failed to Parse Server, " |
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115 | "no hostname specified: '%s'", split); |
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116 | return rv; |
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117 | } |
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118 | |
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119 | if (port == 0) { |
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120 | port = 11211; /* default port */ |
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121 | } |
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122 | |
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123 | /* Should Max Conns be (thread_limit / nservers) ? */ |
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124 | rv = apr_memcache_server_create(p, |
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125 | host_str, port, |
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126 | 0, |
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127 | 1, |
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128 | thread_limit, |
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129 | 600, |
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130 | &st); |
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131 | if(rv != APR_SUCCESS) { |
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132 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, |
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133 | "[gnutls_cache] Failed to Create Server: %s:%d", |
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134 | host_str, port); |
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135 | return rv; |
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136 | } |
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137 | |
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138 | rv = apr_memcache_add_server(mc, st); |
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139 | if(rv != APR_SUCCESS) { |
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140 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, |
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141 | "[gnutls_cache] Failed to Add Server: %s:%d", |
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142 | host_str, port); |
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143 | return rv; |
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144 | } |
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145 | |
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146 | split = apr_strtok(NULL," ", &tok); |
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147 | } |
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148 | return rv; |
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149 | } |
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150 | |
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151 | static int mc_cache_store(void* baton, gnutls_datum_t key, |
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152 | gnutls_datum_t data) |
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153 | { |
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154 | apr_status_t rv = APR_SUCCESS; |
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155 | mod_gnutls_handle_t *ctxt = baton; |
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156 | char buf[STR_SESSION_LEN]; |
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157 | char* strkey = NULL; |
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158 | apr_uint32_t timeout; |
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159 | |
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160 | strkey = gnutls_session_id2sz(key.data, key.size, buf, sizeof(buf)); |
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161 | if(!strkey) |
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162 | return -1; |
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163 | |
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164 | timeout = ctxt->sc->cache_timeout; |
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165 | |
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166 | rv = apr_memcache_set(mc, strkey, data.data, data.size, timeout, 0); |
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167 | |
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168 | if(rv != APR_SUCCESS) { |
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169 | ap_log_error(APLOG_MARK, APLOG_CRIT, rv, |
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170 | ctxt->c->base_server, |
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171 | "[gnutls_cache] error setting key '%s' " |
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172 | "with %d bytes of data", strkey, data.size); |
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173 | return -1; |
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174 | } |
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175 | |
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176 | return 0; |
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177 | } |
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178 | |
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179 | static gnutls_datum_t mc_cache_fetch(void* baton, gnutls_datum_t key) |
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180 | { |
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181 | apr_status_t rv = APR_SUCCESS; |
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182 | mod_gnutls_handle_t *ctxt = baton; |
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183 | char buf[STR_SESSION_LEN]; |
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184 | char* strkey = NULL; |
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185 | char* value; |
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186 | apr_size_t value_len; |
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187 | gnutls_datum_t data = { NULL, 0 }; |
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188 | |
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189 | strkey = gnutls_session_id2sz(key.data, key.size, buf, sizeof(buf)); |
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190 | if(!strkey) { |
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191 | return data; |
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192 | } |
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193 | |
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194 | rv = apr_memcache_getp(mc, ctxt->c->pool, strkey, |
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195 | &value, &value_len, NULL); |
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196 | |
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197 | if(rv != APR_SUCCESS) { |
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198 | ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, |
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199 | ctxt->c->base_server, |
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200 | "[gnutls_cache] error fetching key '%s' ", |
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201 | strkey); |
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202 | |
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203 | data.size = 0; |
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204 | data.data = NULL; |
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205 | return data; |
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206 | } |
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207 | |
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208 | /* TODO: Eliminate this memcpy. gnutls-- */ |
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209 | data.data = gnutls_malloc(value_len); |
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210 | if (data.data == NULL) |
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211 | return data; |
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212 | |
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213 | data.size = value_len; |
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214 | memcpy(data.data, value, value_len); |
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215 | |
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216 | return data; |
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217 | } |
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218 | |
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219 | static int mc_cache_delete(void* baton, gnutls_datum_t key) |
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220 | { |
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221 | apr_status_t rv = APR_SUCCESS; |
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222 | mod_gnutls_handle_t *ctxt = baton; |
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223 | char buf[STR_SESSION_LEN]; |
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224 | char* strkey = NULL; |
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225 | |
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226 | strkey = gnutls_session_id2sz(key.data, key.size, buf, sizeof(buf)); |
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227 | if(!strkey) |
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228 | return -1; |
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229 | |
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230 | rv = apr_memcache_delete(mc, strkey, 0); |
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231 | |
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232 | if(rv != APR_SUCCESS) { |
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233 | ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, |
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234 | ctxt->c->base_server, |
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235 | "[gnutls_cache] error deleting key '%s' ", |
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236 | strkey); |
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237 | return -1; |
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238 | } |
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239 | |
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240 | return 0; |
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241 | } |
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242 | |
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243 | #endif /* have_apr_memcache */ |
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244 | |
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245 | #define SSL_DBM_FILE_MODE ( APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD ) |
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246 | |
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247 | static int dbm_cache_expire(mod_gnutls_handle_t *ctxt) |
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248 | { |
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249 | apr_status_t rv; |
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250 | apr_dbm_t *dbm; |
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251 | |
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252 | rv = apr_dbm_open(&dbm, ctxt->sc->cache_config, |
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253 | APR_DBM_RWCREATE, SSL_DBM_FILE_MODE, ctxt->c->pool); |
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254 | if (rv != APR_SUCCESS) { |
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255 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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256 | ctxt->c->base_server, |
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257 | "[gnutls_cache] error opening cache '%s'", |
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258 | ctxt->sc->cache_config); |
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259 | return -1; |
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260 | } |
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261 | apr_dbm_close(dbm); |
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262 | |
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263 | return 0; |
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264 | } |
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265 | |
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266 | static gnutls_datum_t dbm_cache_fetch(void* baton, gnutls_datum_t key) |
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267 | { |
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268 | gnutls_datum_t data = { NULL, 0 }; |
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269 | apr_dbm_t *dbm; |
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270 | apr_datum_t dbmkey; |
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271 | apr_datum_t dbmval; |
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272 | mod_gnutls_handle_t *ctxt = baton; |
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273 | apr_status_t rv; |
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274 | |
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275 | dbmkey.dptr = key.data; |
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276 | dbmkey.dsize = key.size; |
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277 | |
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278 | rv = apr_dbm_open(&dbm, ctxt->sc->cache_config, |
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279 | APR_DBM_RWCREATE, SSL_DBM_FILE_MODE, ctxt->c->pool); |
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280 | if (rv != APR_SUCCESS) { |
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281 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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282 | ctxt->c->base_server, |
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283 | "[gnutls_cache] error opening cache '%s'", |
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284 | ctxt->sc->cache_config); |
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285 | return data; |
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286 | } |
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287 | |
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288 | rv = apr_dbm_fetch(dbm, dbmkey, &dbmval); |
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289 | |
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290 | if (rv != APR_SUCCESS) { |
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291 | apr_dbm_close(dbm); |
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292 | return data; |
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293 | } |
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294 | |
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295 | if (dbmval.dptr == NULL || dbmval.dsize <= sizeof(apr_time_t)) { |
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296 | apr_dbm_close(dbm); |
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297 | return data; |
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298 | } |
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299 | |
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300 | data.data = gnutls_malloc(dbmval.dsize - sizeof(apr_time_t)); |
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301 | if (data.data == NULL) |
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302 | return data; |
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303 | |
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304 | data.size = dbmval.dsize - sizeof(apr_time_t); |
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305 | memcpy(data.data, dbmval.dptr+sizeof(apr_time_t), data.size); |
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306 | |
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307 | apr_dbm_close(dbm); |
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308 | return data; |
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309 | } |
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310 | |
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311 | static int dbm_cache_store(void* baton, gnutls_datum_t key, |
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312 | gnutls_datum_t data) |
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313 | { |
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314 | apr_dbm_t *dbm; |
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315 | apr_datum_t dbmkey; |
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316 | apr_datum_t dbmval; |
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317 | mod_gnutls_handle_t *ctxt = baton; |
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318 | apr_status_t rv; |
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319 | apr_time_t timeout; |
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320 | |
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321 | dbmkey.dptr = (char *)key.data; |
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322 | dbmkey.dsize = key.size; |
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323 | |
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324 | /* create DBM value */ |
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325 | dbmval.dsize = data.size; |
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326 | dbmval.dptr = (char *)malloc(dbmval.dsize+sizeof(apr_time_t)); |
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327 | |
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328 | memcpy((char *)dbmval.dptr+sizeof(apr_time_t), |
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329 | data.data, data.size); |
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330 | |
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331 | rv = apr_dbm_open(&dbm, ctxt->sc->cache_config, |
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332 | APR_DBM_RWCREATE, SSL_DBM_FILE_MODE, ctxt->c->pool); |
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333 | if (rv != APR_SUCCESS) { |
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334 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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335 | ctxt->c->base_server, |
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336 | "[gnutls_cache] error opening cache '%s'", |
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337 | ctxt->sc->cache_config); |
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338 | free(dbmval.dptr); |
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339 | return -1; |
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340 | } |
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341 | |
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342 | rv = apr_dbm_store(dbm, dbmkey, dbmval); |
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343 | |
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344 | if (rv != APR_SUCCESS) { |
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345 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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346 | ctxt->c->base_server, |
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347 | "[gnutls_cache] error storing in cache '%s'", |
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348 | ctxt->sc->cache_config); |
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349 | apr_dbm_close(dbm); |
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350 | free(dbmval.dptr); |
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351 | return -1; |
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352 | } |
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353 | |
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354 | apr_dbm_close(dbm); |
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355 | |
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356 | free(dbmval.dptr); |
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357 | |
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358 | return 0; |
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359 | } |
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360 | |
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361 | static int dbm_cache_delete(void* baton, gnutls_datum_t key) |
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362 | { |
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363 | apr_dbm_t *dbm; |
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364 | apr_datum_t dbmkey; |
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365 | mod_gnutls_handle_t *ctxt = baton; |
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366 | apr_status_t rv; |
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367 | |
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368 | dbmkey.dptr = (char *)key.data; |
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369 | dbmkey.dsize = key.size; |
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370 | |
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371 | rv = apr_dbm_open(&dbm, ctxt->sc->cache_config, |
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372 | APR_DBM_RWCREATE, SSL_DBM_FILE_MODE, ctxt->c->pool); |
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373 | if (rv != APR_SUCCESS) { |
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374 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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375 | ctxt->c->base_server, |
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376 | "[gnutls_cache] error opening cache '%s'", |
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377 | ctxt->sc->cache_config); |
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378 | return -1; |
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379 | } |
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380 | |
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381 | rv = apr_dbm_delete(dbm, dbmkey); |
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382 | |
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383 | if (rv != APR_SUCCESS) { |
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384 | ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, |
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385 | ctxt->c->base_server, |
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386 | "[gnutls_cache] error storing in cache '%s'", |
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387 | ctxt->sc->cache_config); |
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388 | apr_dbm_close(dbm); |
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389 | return -1; |
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390 | } |
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391 | |
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392 | apr_dbm_close(dbm); |
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393 | |
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394 | return 0; |
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395 | } |
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396 | |
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397 | static int dbm_cache_child_init(apr_pool_t *p, server_rec *s, |
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398 | mod_gnutls_srvconf_rec *sc) |
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399 | { |
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400 | apr_status_t rv; |
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401 | apr_dbm_t *dbm; |
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402 | const char* path1; |
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403 | const char* path2; |
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404 | |
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405 | rv = apr_dbm_open(&dbm, sc->cache_config, APR_DBM_RWCREATE, |
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406 | SSL_DBM_FILE_MODE, p); |
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407 | |
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408 | if (rv != APR_SUCCESS) { |
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409 | ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, |
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410 | "GnuTLS: Cannot create DBM Cache at `%s'", |
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411 | sc->cache_config); |
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412 | return rv; |
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413 | } |
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414 | |
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415 | apr_dbm_close(dbm); |
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416 | |
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417 | apr_dbm_get_usednames(p, sc->cache_config, &path1, &path2); |
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418 | |
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419 | /* The Following Code takes logic directly from mod_ssl's DBM Cache */ |
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420 | #if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE) |
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421 | /* Running as Root */ |
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422 | if (geteuid() == 0) { |
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423 | chown(path1, unixd_config.user_id, -1); |
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424 | if (path2 != NULL) { |
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425 | chown(path2, unixd_config.user_id, -1); |
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426 | } |
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427 | } |
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428 | #endif |
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429 | |
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430 | return rv; |
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431 | } |
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432 | |
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433 | int mod_gnutls_cache_post_config(apr_pool_t *p, server_rec *s, |
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434 | mod_gnutls_srvconf_rec *sc) |
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435 | { |
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436 | if (sc->cache_type == mod_gnutls_cache_dbm) { |
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437 | return dbm_cache_child_init(p, s, sc); |
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438 | } |
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439 | return 0; |
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440 | } |
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441 | |
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442 | int mod_gnutls_cache_child_init(apr_pool_t *p, server_rec *s, |
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443 | mod_gnutls_srvconf_rec *sc) |
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444 | { |
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445 | if (sc->cache_type == mod_gnutls_cache_dbm) { |
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446 | return 0; |
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447 | } |
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448 | #if HAVE_APR_MEMCACHE |
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449 | else if (sc->cache_type == mod_gnutls_cache_memcache) { |
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450 | return mc_cache_child_init(p, s, sc); |
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451 | } |
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452 | #endif |
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453 | return 0; |
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454 | } |
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455 | |
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456 | #include <assert.h> |
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457 | |
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458 | int mod_gnutls_cache_session_init(mod_gnutls_handle_t *ctxt) |
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459 | { |
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460 | printf("Type: %d Params: %s\n",ctxt->sc->cache_type, ctxt->sc->cache_config); |
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461 | if (ctxt->sc->cache_type == mod_gnutls_cache_dbm) { |
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462 | gnutls_db_set_retrieve_function(ctxt->session, dbm_cache_fetch); |
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463 | gnutls_db_set_remove_function(ctxt->session, dbm_cache_delete); |
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464 | gnutls_db_set_store_function(ctxt->session, dbm_cache_store); |
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465 | gnutls_db_set_ptr(ctxt->session, ctxt); |
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466 | } |
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467 | #if HAVE_APR_MEMCACHE |
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468 | else if (ctxt->sc->cache_type == mod_gnutls_cache_memcache) { |
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469 | gnutls_db_set_retrieve_function(ctxt->session, mc_cache_fetch); |
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470 | gnutls_db_set_remove_function(ctxt->session, mc_cache_delete); |
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471 | gnutls_db_set_store_function(ctxt->session, mc_cache_store); |
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472 | gnutls_db_set_ptr(ctxt->session, ctxt); |
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473 | } |
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474 | #endif |
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475 | else { |
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476 | assert(1); |
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477 | /* No Session Cache is Available. Opps. */ |
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478 | } |
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479 | return 0; |
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480 | } |
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