0
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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_http.h>
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10
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122
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11
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220
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12 typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c,
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13 ngx_pool_t *pool, ngx_str_t *s);
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160
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14
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15
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0
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16 #define NGX_DEFLAUT_CERTIFICATE "cert.pem"
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17 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem"
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96
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18 #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP"
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0
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19
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20
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220
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21 static ngx_int_t ngx_http_ssl_static_variable(ngx_http_request_t *r,
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160
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22 ngx_http_variable_value_t *v, uintptr_t data);
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220
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23 static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r,
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196
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24 ngx_http_variable_value_t *v, uintptr_t data);
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160
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25
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26 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
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0
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27 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
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28 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
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50
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29 void *parent, void *child);
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0
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30
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272
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31 static char *ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
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32 void *conf);
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33
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112
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34 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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35
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36 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
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37 void *conf);
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38
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39 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
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40
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41 #endif
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42
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0
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43
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96
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44 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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45 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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46 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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47 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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48 { ngx_null_string, 0 }
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49 };
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50
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51
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0
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52 static ngx_command_t ngx_http_ssl_commands[] = {
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53
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54 { ngx_string("ssl"),
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148
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55 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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0
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56 ngx_conf_set_flag_slot,
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57 NGX_HTTP_SRV_CONF_OFFSET,
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58 offsetof(ngx_http_ssl_srv_conf_t, enable),
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59 NULL },
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60
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61 { ngx_string("ssl_certificate"),
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148
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62 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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63 ngx_conf_set_str_slot,
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64 NGX_HTTP_SRV_CONF_OFFSET,
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65 offsetof(ngx_http_ssl_srv_conf_t, certificate),
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66 NULL },
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67
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68 { ngx_string("ssl_certificate_key"),
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148
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69 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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70 ngx_conf_set_str_slot,
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71 NGX_HTTP_SRV_CONF_OFFSET,
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72 offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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73 NULL },
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74
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96
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75 { ngx_string("ssl_protocols"),
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112
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76 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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77 ngx_conf_set_bitmask_slot,
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78 NGX_HTTP_SRV_CONF_OFFSET,
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79 offsetof(ngx_http_ssl_srv_conf_t, protocols),
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80 &ngx_http_ssl_protocols },
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81
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28
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82 { ngx_string("ssl_ciphers"),
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112
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83 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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28
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84 ngx_conf_set_str_slot,
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85 NGX_HTTP_SRV_CONF_OFFSET,
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86 offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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87 NULL },
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88
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196
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89 { ngx_string("ssl_verify_client"),
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216
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90 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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196
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91 ngx_conf_set_flag_slot,
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92 NGX_HTTP_SRV_CONF_OFFSET,
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93 offsetof(ngx_http_ssl_srv_conf_t, verify),
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94 NULL },
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95
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96 { ngx_string("ssl_verify_depth"),
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97 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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98 ngx_conf_set_num_slot,
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99 NGX_HTTP_SRV_CONF_OFFSET,
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100 offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
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101 NULL },
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102
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103 { ngx_string("ssl_client_certificate"),
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104 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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105 ngx_conf_set_str_slot,
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106 NGX_HTTP_SRV_CONF_OFFSET,
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107 offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
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108 NULL },
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109
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96
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110 { ngx_string("ssl_prefer_server_ciphers"),
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111 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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112
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112 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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96
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113 ngx_conf_set_flag_slot,
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114 NGX_HTTP_SRV_CONF_OFFSET,
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115 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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116 NULL },
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112
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117 #else
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118 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 },
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119 #endif
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96
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120
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272
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121 { ngx_string("ssl_session_cache"),
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122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12,
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123 ngx_http_ssl_session_cache,
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124 NGX_HTTP_SRV_CONF_OFFSET,
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125 0,
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126 NULL },
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127
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122
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128 { ngx_string("ssl_session_timeout"),
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129 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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130 ngx_conf_set_sec_slot,
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131 NGX_HTTP_SRV_CONF_OFFSET,
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132 offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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133 NULL },
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134
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0
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135 ngx_null_command
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136 };
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137
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138
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139 static ngx_http_module_t ngx_http_ssl_module_ctx = {
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140 ngx_http_ssl_add_variables, /* preconfiguration */
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141 NULL, /* postconfiguration */
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142
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143 NULL, /* create main configuration */
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144 NULL, /* init main configuration */
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145
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146 ngx_http_ssl_create_srv_conf, /* create server configuration */
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147 ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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148
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149 NULL, /* create location configuration */
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34
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150 NULL /* merge location configuration */
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0
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151 };
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152
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153
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154 ngx_module_t ngx_http_ssl_module = {
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58
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155 NGX_MODULE_V1,
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156 &ngx_http_ssl_module_ctx, /* module context */
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157 ngx_http_ssl_commands, /* module directives */
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158 NGX_HTTP_MODULE, /* module type */
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90
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159 NULL, /* init master */
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160 NULL, /* init module */
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90
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161 NULL, /* init process */
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162 NULL, /* init thread */
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163 NULL, /* exit thread */
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164 NULL, /* exit process */
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165 NULL, /* exit master */
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166 NGX_MODULE_V1_PADDING
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0
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167 };
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168
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169
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160
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170 static ngx_http_variable_t ngx_http_ssl_vars[] = {
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171
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220
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172 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable,
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160
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173 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 },
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174
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220
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175 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable,
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160
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176 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 },
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177
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220
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178 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable,
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179 (uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGABLE, 0 },
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196
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180
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220
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181 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable,
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182 (uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGABLE, 0 },
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183
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184 { ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable,
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185 (uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGABLE, 0 },
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196
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186
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186
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187 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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160
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188 };
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189
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190
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272
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191 static ngx_str_t ngx_http_ssl_sess_id_ctx = ngx_string("HTTP");
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92
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192
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193
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160
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194 static ngx_int_t
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195 ngx_http_ssl_static_variable(ngx_http_request_t *r,
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196 ngx_http_variable_value_t *v, uintptr_t data)
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197 {
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220
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198 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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199
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200 size_t len;
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201
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202 if (r->connection->ssl) {
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203
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220
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204 (void) handler(r->connection, NULL, (ngx_str_t *) v);
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160
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205
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220
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206 for (len = 0; v->data[len]; len++) { /* void */ }
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160
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207
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208 v->len = len;
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209 v->valid = 1;
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210 v->no_cachable = 0;
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211 v->not_found = 0;
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212
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213 return NGX_OK;
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214 }
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215
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216 v->not_found = 1;
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217
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218 return NGX_OK;
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219 }
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220
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221
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222 static ngx_int_t
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220
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223 ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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196
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224 uintptr_t data)
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225 {
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220
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226 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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196
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227
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228 if (r->connection->ssl) {
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220
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229 if (handler(r->connection, r->pool, (ngx_str_t *) v) != NGX_OK) {
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196
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230 return NGX_ERROR;
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231 }
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232
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233 if (v->len) {
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234 v->valid = 1;
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235 v->no_cachable = 0;
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236 v->not_found = 0;
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237
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238 return NGX_OK;
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239 }
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240 }
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241
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242 v->not_found = 1;
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243
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244 return NGX_OK;
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245 }
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246
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247
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248 static ngx_int_t
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160
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249 ngx_http_ssl_add_variables(ngx_conf_t *cf)
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250 {
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251 ngx_http_variable_t *var, *v;
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252
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253 for (v = ngx_http_ssl_vars; v->name.len; v++) {
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254 var = ngx_http_add_variable(cf, &v->name, v->flags);
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255 if (var == NULL) {
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256 return NGX_ERROR;
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257 }
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258
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186
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259 var->get_handler = v->get_handler;
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160
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260 var->data = v->data;
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261 }
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262
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263 return NGX_OK;
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264 }
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265
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266
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50
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267 static void *
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268 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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0
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269 {
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272
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270 ngx_http_ssl_srv_conf_t *sscf;
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0
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271
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272
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272 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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273 if (sscf == NULL) {
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0
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274 return NGX_CONF_ERROR;
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275 }
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276
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28
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277 /*
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278 * set by ngx_pcalloc():
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279 *
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272
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280 * sscf->protocols = 0;
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281 * sscf->certificate.len = 0;
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282 * sscf->certificate.data = NULL;
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283 * sscf->certificate_key.len = 0;
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284 * sscf->certificate_key.data = NULL;
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285 * sscf->client_certificate.len = 0;
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286 * sscf->client_certificate.data = NULL;
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287 * sscf->ciphers.len = 0;
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288 * sscf->ciphers.data = NULL;
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289 * sscf->shm_zone = NULL;
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28
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290 */
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291
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272
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292 sscf->enable = NGX_CONF_UNSET;
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293 sscf->verify = NGX_CONF_UNSET;
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294 sscf->verify_depth = NGX_CONF_UNSET;
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295 sscf->prefer_server_ciphers = NGX_CONF_UNSET;
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296 sscf->builtin_session_cache = NGX_CONF_UNSET;
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297 sscf->session_timeout = NGX_CONF_UNSET;
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0
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298
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272
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299 return sscf;
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0
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300 }
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301
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302
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50
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303 static char *
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304 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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0
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305 {
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306 ngx_http_ssl_srv_conf_t *prev = parent;
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307 ngx_http_ssl_srv_conf_t *conf = child;
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308
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112
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309 ngx_pool_cleanup_t *cln;
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310
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0
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311 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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312
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313 if (conf->enable == 0) {
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314 return NGX_CONF_OK;
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315 }
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316
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122
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317 ngx_conf_merge_value(conf->session_timeout,
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318 prev->session_timeout, 300);
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319
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96
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320 ngx_conf_merge_value(conf->prefer_server_ciphers,
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321 prev->prefer_server_ciphers, 0);
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322
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323 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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324 (NGX_CONF_BITMASK_SET
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325 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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326
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196
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327 ngx_conf_merge_value(conf->verify, prev->verify, 0);
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328 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1);
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329
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0
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330 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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96
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331 NGX_DEFLAUT_CERTIFICATE);
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0
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332
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333 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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96
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334 NGX_DEFLAUT_CERTIFICATE_KEY);
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0
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335
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196
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336 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
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337 "");
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338
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96
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339 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
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28
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340
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341
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96
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342 conf->ssl.log = cf->log;
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0
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343
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272
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344 if (ngx_ssl_create(&conf->ssl, conf->protocols, conf) != NGX_OK) {
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0
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345 return NGX_CONF_ERROR;
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346 }
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347
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306
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348 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
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349
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350 if (SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx,
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351 ngx_http_ssl_servername)
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352 == 0)
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353 {
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354 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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355 "SSL_CTX_set_tlsext_servername_callback() failed");
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356 return NGX_CONF_ERROR;
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357 }
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358
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359 #endif
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360
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112
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361 cln = ngx_pool_cleanup_add(cf->pool, 0);
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362 if (cln == NULL) {
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58
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363 return NGX_CONF_ERROR;
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364 }
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365
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112
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366 cln->handler = ngx_ssl_cleanup_ctx;
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367 cln->data = &conf->ssl;
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368
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369 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
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272
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370 &conf->certificate_key)
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371 != NGX_OK)
|
78
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372 {
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0
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373 return NGX_CONF_ERROR;
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374 }
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375
|
96
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376 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
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112
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377 (const char *) conf->ciphers.data)
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378 == 0)
|
78
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379 {
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0
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380 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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96
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381 "SSL_CTX_set_cipher_list(\"%V\") failed",
|
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382 &conf->ciphers);
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383 }
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384
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196
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385 if (conf->verify) {
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220
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386 if (ngx_ssl_client_certificate(cf, &conf->ssl,
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272
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387 &conf->client_certificate,
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388 conf->verify_depth)
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220
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389 != NGX_OK)
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390 {
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391 return NGX_CONF_ERROR;
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196
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392 }
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393 }
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394
|
112
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395 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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396
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96
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397 if (conf->prefer_server_ciphers) {
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398 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
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399 }
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400
|
112
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401 #endif
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402
|
96
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403 /* a temporary 512-bit RSA key is required for export versions of MSIE */
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404 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
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0
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405 return NGX_CONF_ERROR;
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406 }
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407
|
272
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408 ngx_conf_merge_value(conf->builtin_session_cache,
|
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409 prev->builtin_session_cache,
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410 NGX_SSL_DFLT_BUILTIN_SCACHE);
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411
|
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412 if (conf->shm_zone == NULL) {
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413 conf->shm_zone = prev->shm_zone;
|
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414 }
|
92
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415
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272
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416 if (ngx_ssl_session_cache(&conf->ssl, &ngx_http_ssl_sess_id_ctx,
|
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417 conf->builtin_session_cache,
|
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418 conf->shm_zone, conf->session_timeout)
|
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419 != NGX_OK)
|
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420 {
|
|
421 return NGX_CONF_ERROR;
|
|
422 }
|
122
|
423
|
0
|
424 return NGX_CONF_OK;
|
|
425 }
|
112
|
426
|
|
427
|
272
|
428 static char *
|
|
429 ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
430 {
|
|
431 ngx_http_ssl_srv_conf_t *sscf = conf;
|
|
432
|
|
433 size_t len;
|
|
434 ngx_str_t *value, name, size;
|
|
435 ngx_int_t n;
|
|
436 ngx_uint_t i, j;
|
|
437
|
|
438 value = cf->args->elts;
|
|
439
|
|
440 for (i = 1; i < cf->args->nelts; i++) {
|
|
441
|
|
442 if (ngx_strcmp(value[i].data, "builtin") == 0) {
|
|
443 sscf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
|
|
444 continue;
|
|
445 }
|
|
446
|
|
447 if (value[i].len > sizeof("builtin:") - 1
|
|
448 && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
|
|
449 == 0)
|
|
450 {
|
|
451 n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
|
|
452 value[i].len - (sizeof("builtin:") - 1));
|
|
453
|
|
454 if (n == NGX_ERROR) {
|
|
455 goto invalid;
|
|
456 }
|
|
457
|
|
458 sscf->builtin_session_cache = n;
|
|
459
|
|
460 continue;
|
|
461 }
|
|
462
|
|
463 if (value[i].len > sizeof("shared:") - 1
|
|
464 && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
|
|
465 == 0)
|
|
466 {
|
|
467 len = 0;
|
|
468
|
|
469 for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
|
|
470 if (value[i].data[j] == ':') {
|
|
471 break;
|
|
472 }
|
|
473
|
|
474 len++;
|
|
475 }
|
|
476
|
|
477 if (len == 0) {
|
|
478 goto invalid;
|
|
479 }
|
|
480
|
|
481 name.len = len;
|
|
482 name.data = value[i].data + sizeof("shared:") - 1;
|
|
483
|
|
484 size.len = value[i].len - j - 1;
|
|
485 size.data = name.data + len + 1;
|
|
486
|
|
487 n = ngx_parse_size(&size);
|
|
488
|
|
489 if (n == NGX_ERROR) {
|
|
490 goto invalid;
|
|
491 }
|
|
492
|
|
493 if (n < (ngx_int_t) (8 * ngx_pagesize)) {
|
|
494 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
495 "session cache \"%V\" is too small",
|
|
496 &value[i]);
|
|
497
|
|
498 return NGX_CONF_ERROR;
|
|
499 }
|
|
500
|
|
501 sscf->shm_zone = ngx_shared_memory_add(cf, &name, n,
|
|
502 &ngx_http_ssl_module);
|
|
503 if (sscf->shm_zone == NULL) {
|
|
504 return NGX_CONF_ERROR;
|
|
505 }
|
|
506
|
|
507 continue;
|
|
508 }
|
|
509
|
|
510 goto invalid;
|
|
511 }
|
|
512
|
|
513 if (sscf->shm_zone && sscf->builtin_session_cache == NGX_CONF_UNSET) {
|
|
514 sscf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
|
|
515 }
|
|
516
|
|
517 return NGX_CONF_OK;
|
|
518
|
|
519 invalid:
|
|
520
|
|
521 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
522 "invalid session cache \"%V\"", &value[i]);
|
|
523
|
|
524 return NGX_CONF_ERROR;
|
|
525 }
|
|
526
|
|
527
|
112
|
528 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
|
|
529
|
|
530 static char *
|
|
531 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
532 {
|
|
533 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
534 "\"%V\" directive is available only in %s,",
|
|
535 &cmd->name, cmd->post);
|
|
536
|
|
537 return NGX_CONF_ERROR;
|
|
538 }
|
|
539
|
|
540 #endif
|