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539
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_imap.h>
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10
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11
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12 #define NGX_DEFLAUT_CERTIFICATE "cert.pem"
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13 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem"
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14
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15
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16 static void *ngx_imap_ssl_create_conf(ngx_conf_t *cf);
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17 static char *ngx_imap_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
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18
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19
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20 static ngx_command_t ngx_imap_ssl_commands[] = {
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21
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22 { ngx_string("ssl"),
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23 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
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24 ngx_conf_set_flag_slot,
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25 NGX_IMAP_SRV_CONF_OFFSET,
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26 offsetof(ngx_imap_ssl_conf_t, enable),
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27 NULL },
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28
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29 { ngx_string("ssl_certificate"),
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30 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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31 ngx_conf_set_str_slot,
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32 NGX_IMAP_SRV_CONF_OFFSET,
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33 offsetof(ngx_imap_ssl_conf_t, certificate),
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34 NULL },
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35
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36 { ngx_string("ssl_certificate_key"),
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37 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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38 ngx_conf_set_str_slot,
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39 NGX_IMAP_SRV_CONF_OFFSET,
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40 offsetof(ngx_imap_ssl_conf_t, certificate_key),
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41 NULL },
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42
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43 { ngx_string("ssl_ciphers"),
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44 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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45 ngx_conf_set_str_slot,
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46 NGX_IMAP_SRV_CONF_OFFSET,
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47 offsetof(ngx_imap_ssl_conf_t, ciphers),
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48 NULL },
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49
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50 ngx_null_command
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51 };
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52
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53
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54 static ngx_imap_module_t ngx_imap_ssl_module_ctx = {
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55 NULL, /* create main configuration */
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56 NULL, /* init main configuration */
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57
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58 ngx_imap_ssl_create_conf, /* create server configuration */
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59 ngx_imap_ssl_merge_conf /* merge server configuration */
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60 };
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61
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62
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63 ngx_module_t ngx_imap_ssl_module = {
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64 NGX_MODULE_V1,
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65 &ngx_imap_ssl_module_ctx, /* module context */
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66 ngx_imap_ssl_commands, /* module directives */
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67 NGX_IMAP_MODULE, /* module type */
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541
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68 NULL, /* init master */
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539
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69 NULL, /* init module */
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541
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70 NULL, /* init process */
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71 NULL, /* init thread */
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72 NULL, /* exit thread */
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73 NULL, /* exit process */
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74 NULL, /* exit master */
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75 NGX_MODULE_V1_PADDING
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539
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76 };
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77
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78
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543
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79 static u_char ngx_imap_session_id_ctx[] = "IMAP";
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80
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81
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539
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82 static void *
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83 ngx_imap_ssl_create_conf(ngx_conf_t *cf)
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84 {
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85 ngx_imap_ssl_conf_t *scf;
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86
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87 scf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_ssl_conf_t));
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88 if (scf == NULL) {
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89 return NGX_CONF_ERROR;
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90 }
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91
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92 /*
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93 * set by ngx_pcalloc():
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94 *
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95 * scf->certificate.len = 0;
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96 * scf->certificate.data = NULL;
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97 * scf->certificate_key.len = 0;
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98 * scf->certificate_key.data = NULL;
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99 * scf->ciphers.len = 0;
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100 * scf->ciphers.data = NULL;
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101 */
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102
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103 scf->enable = NGX_CONF_UNSET;
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104
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105 return scf;
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106 }
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107
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108
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109 static char *
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110 ngx_imap_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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111 {
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112 ngx_imap_ssl_conf_t *prev = parent;
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113 ngx_imap_ssl_conf_t *conf = child;
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114
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115 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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116
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117 if (conf->enable == 0) {
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118 return NGX_CONF_OK;
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119 }
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120
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121 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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122 NGX_DEFLAUT_CERTIFICATE);
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123
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124 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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125 NGX_DEFLAUT_CERTIFICATE_KEY);
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126
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127 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, "");
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128
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129
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130 /* TODO: configure methods */
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131
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132 conf->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
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133
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134 if (conf->ssl_ctx == NULL) {
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135 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, "SSL_CTX_new() failed");
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136 return NGX_CONF_ERROR;
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137 }
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138
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139 if (ngx_pool_cleanup_add(cf->pool, ngx_ssl_cleanup_ctx, conf->ssl_ctx)
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140 == NULL)
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141 {
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142 return NGX_CONF_ERROR;
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143 }
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144
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145
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146 #if 0
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147 SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_ALL);
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148 SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_NO_SSLv3);
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149 SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_SINGLE_DH_USE);
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150 #endif
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151
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152 if (conf->ciphers.len) {
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153 if (SSL_CTX_set_cipher_list(conf->ssl_ctx,
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154 (const char *) conf->ciphers.data) == 0)
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155 {
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156 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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157 "SSL_CTX_set_cipher_list(\"%V\") failed",
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158 &conf->ciphers);
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159 }
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160 }
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161
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162 if (SSL_CTX_use_certificate_chain_file(conf->ssl_ctx,
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163 (char *) conf->certificate.data) == 0)
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164 {
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165 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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166 "SSL_CTX_use_certificate_chain_file(\"%s\") failed",
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167 conf->certificate.data);
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168 return NGX_CONF_ERROR;
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169 }
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170
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171
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172 if (SSL_CTX_use_PrivateKey_file(conf->ssl_ctx,
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173 (char *) conf->certificate_key.data,
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174 SSL_FILETYPE_PEM) == 0)
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175 {
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176 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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177 "SSL_CTX_use_PrivateKey_file(\"%s\") failed",
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178 conf->certificate_key.data);
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179 return NGX_CONF_ERROR;
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180 }
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181
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543
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182 SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_ALL);
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183
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184 SSL_CTX_set_mode(conf->ssl_ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
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185
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186 SSL_CTX_set_read_ahead(conf->ssl_ctx, 1);
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187
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188 SSL_CTX_set_session_cache_mode(conf->ssl_ctx, SSL_SESS_CACHE_SERVER);
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189
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190 SSL_CTX_set_session_id_context(conf->ssl_ctx, ngx_imap_session_id_ctx,
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191 sizeof(ngx_imap_session_id_ctx) - 1);
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541
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192
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539
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193 return NGX_CONF_OK;
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194 }
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