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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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160
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12 typedef u_char *(*ngx_ssl_variable_handler_pt)(ngx_connection_t *);
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13
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14
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0
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15 #define NGX_DEFLAUT_CERTIFICATE "cert.pem"
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16 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem"
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96
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17 #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP"
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0
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18
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19
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160
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20 static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r,
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21 ngx_http_variable_value_t *v, uintptr_t data);
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22
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23 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
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0
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24 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
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25 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
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50
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26 void *parent, void *child);
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0
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27
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112
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28 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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29
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30 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
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31 void *conf);
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32
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33 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
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34
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35 #endif
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36
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0
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37
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96
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38 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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39 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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40 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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41 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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42 { ngx_null_string, 0 }
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43 };
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44
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45
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112
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46
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0
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47 static ngx_command_t ngx_http_ssl_commands[] = {
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48
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49 { ngx_string("ssl"),
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148
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50 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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0
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51 ngx_conf_set_flag_slot,
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52 NGX_HTTP_SRV_CONF_OFFSET,
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53 offsetof(ngx_http_ssl_srv_conf_t, enable),
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54 NULL },
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55
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56 { ngx_string("ssl_certificate"),
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148
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57 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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58 ngx_conf_set_str_slot,
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59 NGX_HTTP_SRV_CONF_OFFSET,
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60 offsetof(ngx_http_ssl_srv_conf_t, certificate),
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61 NULL },
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62
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63 { ngx_string("ssl_certificate_key"),
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148
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64 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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65 ngx_conf_set_str_slot,
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66 NGX_HTTP_SRV_CONF_OFFSET,
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67 offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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68 NULL },
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69
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96
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70 { ngx_string("ssl_protocols"),
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112
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71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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96
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72 ngx_conf_set_bitmask_slot,
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73 NGX_HTTP_SRV_CONF_OFFSET,
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74 offsetof(ngx_http_ssl_srv_conf_t, protocols),
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75 &ngx_http_ssl_protocols },
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76
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28
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77 { ngx_string("ssl_ciphers"),
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112
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78 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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28
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79 ngx_conf_set_str_slot,
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80 NGX_HTTP_SRV_CONF_OFFSET,
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81 offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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82 NULL },
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83
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96
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84 { ngx_string("ssl_prefer_server_ciphers"),
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85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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112
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86 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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96
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87 ngx_conf_set_flag_slot,
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88 NGX_HTTP_SRV_CONF_OFFSET,
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89 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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90 NULL },
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112
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91 #else
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92 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 },
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93 #endif
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96
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94
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122
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95 { ngx_string("ssl_session_timeout"),
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96 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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97 ngx_conf_set_sec_slot,
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98 NGX_HTTP_SRV_CONF_OFFSET,
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99 offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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100 NULL },
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101
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0
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102 ngx_null_command
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103 };
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104
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105
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106 static ngx_http_module_t ngx_http_ssl_module_ctx = {
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160
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107 ngx_http_ssl_add_variables, /* preconfiguration */
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108 NULL, /* postconfiguration */
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0
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109
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90
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110 NULL, /* create main configuration */
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111 NULL, /* init main configuration */
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112
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113 ngx_http_ssl_create_srv_conf, /* create server configuration */
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114 ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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115
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116 NULL, /* create location configuration */
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34
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117 NULL /* merge location configuration */
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118 };
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119
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120
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121 ngx_module_t ngx_http_ssl_module = {
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58
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122 NGX_MODULE_V1,
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123 &ngx_http_ssl_module_ctx, /* module context */
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124 ngx_http_ssl_commands, /* module directives */
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125 NGX_HTTP_MODULE, /* module type */
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90
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126 NULL, /* init master */
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127 NULL, /* init module */
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90
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128 NULL, /* init process */
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129 NULL, /* init thread */
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130 NULL, /* exit thread */
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131 NULL, /* exit process */
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132 NULL, /* exit master */
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133 NGX_MODULE_V1_PADDING
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134 };
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135
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136
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137 static ngx_http_variable_t ngx_http_ssl_vars[] = {
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138
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186
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139 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_variable,
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140 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 },
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141
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186
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142 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_variable,
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143 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 },
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144
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186
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145 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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146 };
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147
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148
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92
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149 static u_char ngx_http_session_id_ctx[] = "HTTP";
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150
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151
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160
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152 static ngx_int_t
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153 ngx_http_ssl_variable(ngx_http_request_t *r,
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154 ngx_http_variable_value_t *v, uintptr_t data)
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155 {
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156 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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157
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158 size_t len;
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159 u_char *name;
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160
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161 if (r->connection->ssl) {
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162
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163 name = handler(r->connection);
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164
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165 for (len = 0; name[len]; len++) { /* void */ }
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166
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167 v->len = len;
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168 v->valid = 1;
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169 v->no_cachable = 0;
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170 v->not_found = 0;
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171 v->data = name;
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172
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173 return NGX_OK;
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174 }
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175
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176 v->not_found = 1;
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177
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178 return NGX_OK;
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179 }
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180
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181
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182 static ngx_int_t
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183 ngx_http_ssl_add_variables(ngx_conf_t *cf)
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184 {
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185 ngx_http_variable_t *var, *v;
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186
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187 for (v = ngx_http_ssl_vars; v->name.len; v++) {
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188 var = ngx_http_add_variable(cf, &v->name, v->flags);
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189 if (var == NULL) {
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190 return NGX_ERROR;
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191 }
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192
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186
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193 var->get_handler = v->get_handler;
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194 var->data = v->data;
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195 }
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196
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197 return NGX_OK;
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198 }
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199
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200
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201 static void *
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202 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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203 {
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204 ngx_http_ssl_srv_conf_t *scf;
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205
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206 scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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207 if (scf == NULL) {
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208 return NGX_CONF_ERROR;
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209 }
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210
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211 /*
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212 * set by ngx_pcalloc():
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213 *
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214 * scf->protocols = 0;
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215
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216 * scf->certificate.len = 0;
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217 * scf->certificate.data = NULL;
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218 * scf->certificate_key.len = 0;
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219 * scf->certificate_key.data = NULL;
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220 * scf->ciphers.len = 0;
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221 * scf->ciphers.data = NULL;
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222 */
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223
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224 scf->enable = NGX_CONF_UNSET;
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225 scf->session_timeout = NGX_CONF_UNSET;
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226 scf->prefer_server_ciphers = NGX_CONF_UNSET;
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227
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228 return scf;
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229 }
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230
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231
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232 static char *
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233 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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234 {
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235 ngx_http_ssl_srv_conf_t *prev = parent;
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236 ngx_http_ssl_srv_conf_t *conf = child;
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237
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238 ngx_pool_cleanup_t *cln;
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239
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240 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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241
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242 if (conf->enable == 0) {
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243 return NGX_CONF_OK;
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244 }
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245
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246 ngx_conf_merge_value(conf->session_timeout,
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247 prev->session_timeout, 300);
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248
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249 ngx_conf_merge_value(conf->prefer_server_ciphers,
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250 prev->prefer_server_ciphers, 0);
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251
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252 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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253 (NGX_CONF_BITMASK_SET
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254 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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255
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256 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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257 NGX_DEFLAUT_CERTIFICATE);
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258
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259 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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260 NGX_DEFLAUT_CERTIFICATE_KEY);
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261
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262 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
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263
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264
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265 conf->ssl.log = cf->log;
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266
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267 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) {
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268 return NGX_CONF_ERROR;
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269 }
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270
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271 cln = ngx_pool_cleanup_add(cf->pool, 0);
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272 if (cln == NULL) {
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273 return NGX_CONF_ERROR;
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274 }
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275
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276 cln->handler = ngx_ssl_cleanup_ctx;
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277 cln->data = &conf->ssl;
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278
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279 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
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280 &conf->certificate_key) != NGX_OK)
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281 {
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282 return NGX_CONF_ERROR;
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283 }
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284
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285 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
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286 (const char *) conf->ciphers.data)
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287 == 0)
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288 {
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289 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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290 "SSL_CTX_set_cipher_list(\"%V\") failed",
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291 &conf->ciphers);
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292 }
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293
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112
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294 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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295
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296 if (conf->prefer_server_ciphers) {
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297 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
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298 }
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299
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300 #endif
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301
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302 /* a temporary 512-bit RSA key is required for export versions of MSIE */
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303 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
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304 return NGX_CONF_ERROR;
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305 }
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306
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307 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER);
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92
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308
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309 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx,
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92
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310 sizeof(ngx_http_session_id_ctx) - 1);
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311
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312 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout);
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313
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314 return NGX_CONF_OK;
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315 }
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112
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316
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317
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318 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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319
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320 static char *
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321 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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322 {
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323 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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324 "\"%V\" directive is available only in %s,",
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325 &cmd->name, cmd->post);
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326
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327 return NGX_CONF_ERROR;
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328 }
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329
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330 #endif
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