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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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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112
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31 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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32
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33 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
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34 void *conf);
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35
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36 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
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37
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38 #endif
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39
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0
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40
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96
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41 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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42 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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43 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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44 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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45 { ngx_null_string, 0 }
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46 };
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47
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48
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0
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49 static ngx_command_t ngx_http_ssl_commands[] = {
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50
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51 { ngx_string("ssl"),
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148
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52 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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0
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53 ngx_conf_set_flag_slot,
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54 NGX_HTTP_SRV_CONF_OFFSET,
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55 offsetof(ngx_http_ssl_srv_conf_t, enable),
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56 NULL },
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57
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58 { ngx_string("ssl_certificate"),
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148
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59 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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60 ngx_conf_set_str_slot,
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61 NGX_HTTP_SRV_CONF_OFFSET,
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62 offsetof(ngx_http_ssl_srv_conf_t, certificate),
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63 NULL },
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64
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65 { ngx_string("ssl_certificate_key"),
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148
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66 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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67 ngx_conf_set_str_slot,
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68 NGX_HTTP_SRV_CONF_OFFSET,
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69 offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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70 NULL },
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71
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96
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72 { ngx_string("ssl_protocols"),
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112
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73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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74 ngx_conf_set_bitmask_slot,
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75 NGX_HTTP_SRV_CONF_OFFSET,
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76 offsetof(ngx_http_ssl_srv_conf_t, protocols),
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77 &ngx_http_ssl_protocols },
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78
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28
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79 { ngx_string("ssl_ciphers"),
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112
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80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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28
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81 ngx_conf_set_str_slot,
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82 NGX_HTTP_SRV_CONF_OFFSET,
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83 offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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84 NULL },
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85
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196
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86 { ngx_string("ssl_verify_client"),
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216
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87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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196
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88 ngx_conf_set_flag_slot,
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89 NGX_HTTP_SRV_CONF_OFFSET,
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90 offsetof(ngx_http_ssl_srv_conf_t, verify),
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91 NULL },
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92
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93 { ngx_string("ssl_verify_depth"),
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94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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95 ngx_conf_set_num_slot,
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96 NGX_HTTP_SRV_CONF_OFFSET,
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97 offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
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98 NULL },
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99
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100 { ngx_string("ssl_client_certificate"),
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101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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102 ngx_conf_set_str_slot,
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103 NGX_HTTP_SRV_CONF_OFFSET,
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104 offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
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105 NULL },
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106
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96
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107 { ngx_string("ssl_prefer_server_ciphers"),
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108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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112
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109 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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96
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110 ngx_conf_set_flag_slot,
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111 NGX_HTTP_SRV_CONF_OFFSET,
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112 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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113 NULL },
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112
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114 #else
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115 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 },
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116 #endif
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96
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117
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122
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118 { ngx_string("ssl_session_timeout"),
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119 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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120 ngx_conf_set_sec_slot,
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121 NGX_HTTP_SRV_CONF_OFFSET,
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122 offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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123 NULL },
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124
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0
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125 ngx_null_command
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126 };
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127
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128
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129 static ngx_http_module_t ngx_http_ssl_module_ctx = {
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160
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130 ngx_http_ssl_add_variables, /* preconfiguration */
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58
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131 NULL, /* postconfiguration */
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0
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132
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133 NULL, /* create main configuration */
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134 NULL, /* init main configuration */
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135
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136 ngx_http_ssl_create_srv_conf, /* create server configuration */
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137 ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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138
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139 NULL, /* create location configuration */
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34
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140 NULL /* merge location configuration */
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0
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141 };
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142
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143
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144 ngx_module_t ngx_http_ssl_module = {
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58
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145 NGX_MODULE_V1,
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146 &ngx_http_ssl_module_ctx, /* module context */
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147 ngx_http_ssl_commands, /* module directives */
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148 NGX_HTTP_MODULE, /* module type */
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90
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149 NULL, /* init master */
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150 NULL, /* init module */
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90
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151 NULL, /* init process */
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152 NULL, /* init thread */
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153 NULL, /* exit thread */
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154 NULL, /* exit process */
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155 NULL, /* exit master */
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156 NGX_MODULE_V1_PADDING
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0
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157 };
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158
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159
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160
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160 static ngx_http_variable_t ngx_http_ssl_vars[] = {
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161
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220
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162 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable,
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160
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163 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 },
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164
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220
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165 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable,
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166 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 },
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167
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220
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168 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable,
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169 (uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGABLE, 0 },
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196
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170
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220
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171 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable,
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172 (uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGABLE, 0 },
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173
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174 { ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable,
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175 (uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGABLE, 0 },
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196
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176
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186
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177 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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178 };
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179
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180
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92
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181 static u_char ngx_http_session_id_ctx[] = "HTTP";
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182
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183
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160
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184 static ngx_int_t
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185 ngx_http_ssl_static_variable(ngx_http_request_t *r,
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186 ngx_http_variable_value_t *v, uintptr_t data)
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187 {
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188 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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189
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190 size_t len;
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191
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192 if (r->connection->ssl) {
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193
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194 (void) handler(r->connection, NULL, (ngx_str_t *) v);
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195
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196 for (len = 0; v->data[len]; len++) { /* void */ }
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197
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198 v->len = len;
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199 v->valid = 1;
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200 v->no_cachable = 0;
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201 v->not_found = 0;
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202
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203 return NGX_OK;
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204 }
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205
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206 v->not_found = 1;
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207
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208 return NGX_OK;
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209 }
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210
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211
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212 static ngx_int_t
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213 ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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196
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214 uintptr_t data)
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215 {
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220
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216 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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217
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218 if (r->connection->ssl) {
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219 if (handler(r->connection, r->pool, (ngx_str_t *) v) != NGX_OK) {
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220 return NGX_ERROR;
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221 }
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222
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223 if (v->len) {
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224 v->valid = 1;
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225 v->no_cachable = 0;
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226 v->not_found = 0;
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227
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228 return NGX_OK;
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229 }
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230 }
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231
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232 v->not_found = 1;
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233
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234 return NGX_OK;
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235 }
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236
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237
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238 static ngx_int_t
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239 ngx_http_ssl_add_variables(ngx_conf_t *cf)
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240 {
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241 ngx_http_variable_t *var, *v;
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242
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243 for (v = ngx_http_ssl_vars; v->name.len; v++) {
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244 var = ngx_http_add_variable(cf, &v->name, v->flags);
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245 if (var == NULL) {
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246 return NGX_ERROR;
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247 }
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248
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186
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249 var->get_handler = v->get_handler;
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250 var->data = v->data;
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251 }
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252
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253 return NGX_OK;
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254 }
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255
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256
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257 static void *
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258 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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259 {
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260 ngx_http_ssl_srv_conf_t *scf;
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261
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262 scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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263 if (scf == NULL) {
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0
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264 return NGX_CONF_ERROR;
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265 }
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266
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28
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267 /*
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268 * set by ngx_pcalloc():
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269 *
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270 * scf->protocols = 0;
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271
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28
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272 * scf->certificate.len = 0;
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273 * scf->certificate.data = NULL;
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274 * scf->certificate_key.len = 0;
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275 * scf->certificate_key.data = NULL;
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196
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276 * scf->client_certificate.len = 0;
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277 * scf->client_certificate.data = NULL;
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28
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278 * scf->ciphers.len = 0;
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279 * scf->ciphers.data = NULL;
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280 */
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281
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0
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282 scf->enable = NGX_CONF_UNSET;
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283 scf->session_timeout = NGX_CONF_UNSET;
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196
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284 scf->verify = NGX_CONF_UNSET;
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285 scf->verify_depth = NGX_CONF_UNSET;
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286 scf->prefer_server_ciphers = NGX_CONF_UNSET;
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0
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287
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288 return scf;
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289 }
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290
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291
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292 static char *
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293 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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0
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294 {
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295 ngx_http_ssl_srv_conf_t *prev = parent;
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296 ngx_http_ssl_srv_conf_t *conf = child;
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297
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112
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298 ngx_pool_cleanup_t *cln;
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299
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0
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300 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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301
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302 if (conf->enable == 0) {
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303 return NGX_CONF_OK;
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304 }
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305
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122
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306 ngx_conf_merge_value(conf->session_timeout,
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307 prev->session_timeout, 300);
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308
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96
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309 ngx_conf_merge_value(conf->prefer_server_ciphers,
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310 prev->prefer_server_ciphers, 0);
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311
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312 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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313 (NGX_CONF_BITMASK_SET
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314 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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315
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196
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316 ngx_conf_merge_value(conf->verify, prev->verify, 0);
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317 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1);
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318
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0
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319 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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320 NGX_DEFLAUT_CERTIFICATE);
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0
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321
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322 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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323 NGX_DEFLAUT_CERTIFICATE_KEY);
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324
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196
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325 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
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326 "");
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327
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96
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328 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
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329
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330
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331 conf->ssl.log = cf->log;
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0
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332
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96
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333 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) {
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0
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334 return NGX_CONF_ERROR;
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335 }
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336
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112
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337 cln = ngx_pool_cleanup_add(cf->pool, 0);
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338 if (cln == NULL) {
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339 return NGX_CONF_ERROR;
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340 }
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341
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112
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342 cln->handler = ngx_ssl_cleanup_ctx;
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343 cln->data = &conf->ssl;
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344
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345 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
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346 &conf->certificate_key) != NGX_OK)
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78
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347 {
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0
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348 return NGX_CONF_ERROR;
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349 }
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350
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96
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351 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
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352 (const char *) conf->ciphers.data)
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353 == 0)
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78
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354 {
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0
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355 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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356 "SSL_CTX_set_cipher_list(\"%V\") failed",
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357 &conf->ciphers);
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358 }
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359
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196
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360 if (conf->verify) {
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220
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361 if (ngx_ssl_client_certificate(cf, &conf->ssl,
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362 &conf->client_certificate, conf->verify_depth)
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363 != NGX_OK)
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364 {
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365 return NGX_CONF_ERROR;
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196
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366 }
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367 }
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368
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112
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369 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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370
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96
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371 if (conf->prefer_server_ciphers) {
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372 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
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373 }
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374
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112
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375 #endif
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376
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96
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377 /* a temporary 512-bit RSA key is required for export versions of MSIE */
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378 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
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0
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379 return NGX_CONF_ERROR;
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380 }
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381
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96
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382 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER);
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92
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383
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96
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384 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx,
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92
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385 sizeof(ngx_http_session_id_ctx) - 1);
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90
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386
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122
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387 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout);
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388
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0
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389 return NGX_CONF_OK;
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390 }
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112
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391
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392
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393 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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394
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395 static char *
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396 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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397 {
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398 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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399 "\"%V\" directive is available only in %s,",
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400 &cmd->name, cmd->post);
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401
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402 return NGX_CONF_ERROR;
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403 }
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404
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405 #endif
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