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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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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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196
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22 static ngx_int_t ngx_http_ssl_client_s_dn(ngx_http_request_t *r,
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23 ngx_http_variable_value_t *v, uintptr_t data);
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24 static ngx_int_t ngx_http_ssl_client_i_dn(ngx_http_request_t *r,
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25 ngx_http_variable_value_t *v, uintptr_t data);
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160
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26
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27 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
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0
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28 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
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29 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
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50
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30 void *parent, void *child);
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0
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31
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112
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32 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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33
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34 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
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35 void *conf);
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36
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37 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
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38
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39 #endif
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40
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0
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41
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96
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42 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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43 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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44 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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45 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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46 { ngx_null_string, 0 }
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47 };
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48
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49
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0
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50 static ngx_command_t ngx_http_ssl_commands[] = {
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51
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52 { ngx_string("ssl"),
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148
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53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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0
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54 ngx_conf_set_flag_slot,
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55 NGX_HTTP_SRV_CONF_OFFSET,
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56 offsetof(ngx_http_ssl_srv_conf_t, enable),
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57 NULL },
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58
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59 { ngx_string("ssl_certificate"),
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148
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60 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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61 ngx_conf_set_str_slot,
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62 NGX_HTTP_SRV_CONF_OFFSET,
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63 offsetof(ngx_http_ssl_srv_conf_t, certificate),
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64 NULL },
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65
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66 { ngx_string("ssl_certificate_key"),
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148
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67 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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68 ngx_conf_set_str_slot,
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69 NGX_HTTP_SRV_CONF_OFFSET,
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70 offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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71 NULL },
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72
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96
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73 { ngx_string("ssl_protocols"),
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112
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74 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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96
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75 ngx_conf_set_bitmask_slot,
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76 NGX_HTTP_SRV_CONF_OFFSET,
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77 offsetof(ngx_http_ssl_srv_conf_t, protocols),
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78 &ngx_http_ssl_protocols },
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79
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28
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80 { ngx_string("ssl_ciphers"),
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112
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81 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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28
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82 ngx_conf_set_str_slot,
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83 NGX_HTTP_SRV_CONF_OFFSET,
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84 offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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85 NULL },
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86
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196
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87 { ngx_string("ssl_verify_client"),
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88 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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89 ngx_conf_set_flag_slot,
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90 NGX_HTTP_SRV_CONF_OFFSET,
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91 offsetof(ngx_http_ssl_srv_conf_t, verify),
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92 NULL },
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93
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94 { ngx_string("ssl_verify_depth"),
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95 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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96 ngx_conf_set_num_slot,
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97 NGX_HTTP_SRV_CONF_OFFSET,
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98 offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
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99 NULL },
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100
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101 { ngx_string("ssl_client_certificate"),
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102 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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103 ngx_conf_set_str_slot,
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104 NGX_HTTP_SRV_CONF_OFFSET,
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105 offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
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106 NULL },
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107
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96
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108 { ngx_string("ssl_prefer_server_ciphers"),
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109 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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112
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110 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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96
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111 ngx_conf_set_flag_slot,
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112 NGX_HTTP_SRV_CONF_OFFSET,
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113 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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114 NULL },
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112
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115 #else
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116 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 },
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117 #endif
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96
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118
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122
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119 { ngx_string("ssl_session_timeout"),
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120 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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121 ngx_conf_set_sec_slot,
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122 NGX_HTTP_SRV_CONF_OFFSET,
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123 offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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124 NULL },
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125
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0
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126 ngx_null_command
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127 };
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128
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129
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130 static ngx_http_module_t ngx_http_ssl_module_ctx = {
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160
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131 ngx_http_ssl_add_variables, /* preconfiguration */
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58
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132 NULL, /* postconfiguration */
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0
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133
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90
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134 NULL, /* create main configuration */
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135 NULL, /* init main configuration */
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0
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136
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137 ngx_http_ssl_create_srv_conf, /* create server configuration */
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138 ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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139
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140 NULL, /* create location configuration */
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34
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141 NULL /* merge location configuration */
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0
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142 };
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143
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144
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145 ngx_module_t ngx_http_ssl_module = {
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58
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146 NGX_MODULE_V1,
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0
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147 &ngx_http_ssl_module_ctx, /* module context */
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148 ngx_http_ssl_commands, /* module directives */
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149 NGX_HTTP_MODULE, /* module type */
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90
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150 NULL, /* init master */
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0
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151 NULL, /* init module */
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90
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152 NULL, /* init process */
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153 NULL, /* init thread */
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154 NULL, /* exit thread */
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155 NULL, /* exit process */
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156 NULL, /* exit master */
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157 NGX_MODULE_V1_PADDING
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0
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158 };
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159
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160
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160
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161 static ngx_http_variable_t ngx_http_ssl_vars[] = {
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162
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186
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163 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_variable,
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160
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164 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 },
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165
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186
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166 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_variable,
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160
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167 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 },
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168
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196
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169 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_client_s_dn,
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170 0, NGX_HTTP_VAR_CHANGABLE, 0 },
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171
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172 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_client_i_dn,
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173 0, NGX_HTTP_VAR_CHANGABLE, 0 },
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174
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186
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175 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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160
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176 };
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177
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178
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92
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179 static u_char ngx_http_session_id_ctx[] = "HTTP";
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180
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181
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160
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182 static ngx_int_t
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183 ngx_http_ssl_variable(ngx_http_request_t *r,
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184 ngx_http_variable_value_t *v, uintptr_t data)
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185 {
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186 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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187
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188 size_t len;
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189 u_char *name;
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190
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191 if (r->connection->ssl) {
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192
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193 name = handler(r->connection);
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194
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195 for (len = 0; name[len]; len++) { /* void */ }
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196
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197 v->len = len;
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198 v->valid = 1;
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199 v->no_cachable = 0;
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200 v->not_found = 0;
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201 v->data = name;
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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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196
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213 ngx_http_ssl_client_s_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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214 uintptr_t data)
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215 {
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216 if (r->connection->ssl) {
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217 if (ngx_ssl_get_subject_dn(r->connection, r->pool, (ngx_str_t *) v)
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218 != NGX_OK)
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219 {
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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_client_i_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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240 uintptr_t data)
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241 {
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242 if (r->connection->ssl) {
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243 if (ngx_ssl_get_issuer_dn(r->connection, r->pool, (ngx_str_t *) v)
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244 != NGX_OK)
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245 {
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246 return NGX_ERROR;
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247 }
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248
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249 if (v->len) {
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250 v->valid = 1;
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251 v->no_cachable = 0;
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252 v->not_found = 0;
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253
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254 return NGX_OK;
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255 }
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256 }
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257
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258 v->not_found = 1;
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259
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260 return NGX_OK;
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261 }
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262
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263
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264 static ngx_int_t
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160
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265 ngx_http_ssl_add_variables(ngx_conf_t *cf)
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266 {
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267 ngx_http_variable_t *var, *v;
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268
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269 for (v = ngx_http_ssl_vars; v->name.len; v++) {
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270 var = ngx_http_add_variable(cf, &v->name, v->flags);
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271 if (var == NULL) {
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272 return NGX_ERROR;
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273 }
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274
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186
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275 var->get_handler = v->get_handler;
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160
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276 var->data = v->data;
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277 }
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278
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279 return NGX_OK;
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280 }
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281
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282
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50
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283 static void *
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284 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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0
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285 {
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286 ngx_http_ssl_srv_conf_t *scf;
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287
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50
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288 scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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289 if (scf == NULL) {
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0
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290 return NGX_CONF_ERROR;
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291 }
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292
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28
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293 /*
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294 * set by ngx_pcalloc():
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295 *
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96
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296 * scf->protocols = 0;
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297
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28
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298 * scf->certificate.len = 0;
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299 * scf->certificate.data = NULL;
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300 * scf->certificate_key.len = 0;
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301 * scf->certificate_key.data = NULL;
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196
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302 * scf->client_certificate.len = 0;
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303 * scf->client_certificate.data = NULL;
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28
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304 * scf->ciphers.len = 0;
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305 * scf->ciphers.data = NULL;
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306 */
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307
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0
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308 scf->enable = NGX_CONF_UNSET;
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122
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309 scf->session_timeout = NGX_CONF_UNSET;
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196
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310 scf->verify = NGX_CONF_UNSET;
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311 scf->verify_depth = NGX_CONF_UNSET;
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96
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312 scf->prefer_server_ciphers = NGX_CONF_UNSET;
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0
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313
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314 return scf;
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315 }
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316
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317
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50
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318 static char *
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319 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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0
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320 {
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321 ngx_http_ssl_srv_conf_t *prev = parent;
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322 ngx_http_ssl_srv_conf_t *conf = child;
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323
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112
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324 ngx_pool_cleanup_t *cln;
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325
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0
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326 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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327
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328 if (conf->enable == 0) {
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329 return NGX_CONF_OK;
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330 }
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331
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122
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332 ngx_conf_merge_value(conf->session_timeout,
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333 prev->session_timeout, 300);
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334
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96
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335 ngx_conf_merge_value(conf->prefer_server_ciphers,
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336 prev->prefer_server_ciphers, 0);
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337
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338 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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339 (NGX_CONF_BITMASK_SET
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340 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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341
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196
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342 ngx_conf_merge_value(conf->verify, prev->verify, 0);
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343 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1);
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344
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0
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345 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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96
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346 NGX_DEFLAUT_CERTIFICATE);
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0
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347
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348 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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96
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349 NGX_DEFLAUT_CERTIFICATE_KEY);
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0
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350
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196
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351 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
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352 "");
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353
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96
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354 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
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28
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355
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356
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96
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357 conf->ssl.log = cf->log;
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0
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358
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96
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359 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) {
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0
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360 return NGX_CONF_ERROR;
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361 }
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362
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112
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363 cln = ngx_pool_cleanup_add(cf->pool, 0);
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364 if (cln == NULL) {
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58
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365 return NGX_CONF_ERROR;
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366 }
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367
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112
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368 cln->handler = ngx_ssl_cleanup_ctx;
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369 cln->data = &conf->ssl;
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370
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371 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
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372 &conf->certificate_key) != NGX_OK)
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78
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373 {
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0
|
374 return NGX_CONF_ERROR;
|
|
|
375 }
|
|
|
376
|
|
96
|
377 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
|
|
112
|
378 (const char *) conf->ciphers.data)
|
|
|
379 == 0)
|
|
78
|
380 {
|
|
0
|
381 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
|
|
96
|
382 "SSL_CTX_set_cipher_list(\"%V\") failed",
|
|
|
383 &conf->ciphers);
|
|
|
384 }
|
|
|
385
|
|
196
|
386 if (conf->verify) {
|
|
|
387 SSL_CTX_set_verify(conf->ssl.ctx, NGX_SSL_VERIFY, NULL);
|
|
|
388
|
|
|
389 SSL_CTX_set_verify_depth(conf->ssl.ctx, conf->verify_depth);
|
|
|
390
|
|
|
391 if (conf->client_certificate.len) {
|
|
|
392 if (ngx_ssl_client_certificate(cf, &conf->ssl,
|
|
|
393 &conf->client_certificate)
|
|
|
394 != NGX_OK)
|
|
|
395 {
|
|
|
396 return NGX_CONF_ERROR;
|
|
|
397 }
|
|
|
398 }
|
|
|
399 }
|
|
|
400
|
|
112
|
401 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
|
|
|
402
|
|
96
|
403 if (conf->prefer_server_ciphers) {
|
|
|
404 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
|
|
|
405 }
|
|
|
406
|
|
112
|
407 #endif
|
|
|
408
|
|
96
|
409 /* a temporary 512-bit RSA key is required for export versions of MSIE */
|
|
|
410 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
|
|
0
|
411 return NGX_CONF_ERROR;
|
|
|
412 }
|
|
|
413
|
|
96
|
414 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER);
|
|
92
|
415
|
|
96
|
416 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx,
|
|
92
|
417 sizeof(ngx_http_session_id_ctx) - 1);
|
|
90
|
418
|
|
122
|
419 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout);
|
|
|
420
|
|
0
|
421 return NGX_CONF_OK;
|
|
|
422 }
|
|
112
|
423
|
|
|
424
|
|
|
425 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
|
|
|
426
|
|
|
427 static char *
|
|
|
428 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
429 {
|
|
|
430 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
431 "\"%V\" directive is available only in %s,",
|
|
|
432 &cmd->name, cmd->post);
|
|
|
433
|
|
|
434 return NGX_CONF_ERROR;
|
|
|
435 }
|
|
|
436
|
|
|
437 #endif
|
