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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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218
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20 static int ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store);
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160
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21 static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r,
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22 ngx_http_variable_value_t *v, uintptr_t data);
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196
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23 static ngx_int_t ngx_http_ssl_client_s_dn(ngx_http_request_t *r,
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24 ngx_http_variable_value_t *v, uintptr_t data);
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25 static ngx_int_t ngx_http_ssl_client_i_dn(ngx_http_request_t *r,
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26 ngx_http_variable_value_t *v, uintptr_t data);
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160
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27
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28 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
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0
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29 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
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30 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
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50
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31 void *parent, void *child);
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0
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32
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112
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33 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
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34
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35 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
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36 void *conf);
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37
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38 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
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39
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40 #endif
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41
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0
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42
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96
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43 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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44 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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45 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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46 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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47 { ngx_null_string, 0 }
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48 };
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49
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50
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0
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51 static ngx_command_t ngx_http_ssl_commands[] = {
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52
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53 { ngx_string("ssl"),
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148
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54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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0
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55 ngx_conf_set_flag_slot,
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56 NGX_HTTP_SRV_CONF_OFFSET,
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57 offsetof(ngx_http_ssl_srv_conf_t, enable),
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58 NULL },
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59
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60 { ngx_string("ssl_certificate"),
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148
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61 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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62 ngx_conf_set_str_slot,
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63 NGX_HTTP_SRV_CONF_OFFSET,
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64 offsetof(ngx_http_ssl_srv_conf_t, certificate),
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65 NULL },
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66
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67 { ngx_string("ssl_certificate_key"),
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148
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68 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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0
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69 ngx_conf_set_str_slot,
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70 NGX_HTTP_SRV_CONF_OFFSET,
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71 offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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72 NULL },
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73
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96
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74 { ngx_string("ssl_protocols"),
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112
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75 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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96
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76 ngx_conf_set_bitmask_slot,
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77 NGX_HTTP_SRV_CONF_OFFSET,
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78 offsetof(ngx_http_ssl_srv_conf_t, protocols),
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79 &ngx_http_ssl_protocols },
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80
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28
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81 { ngx_string("ssl_ciphers"),
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112
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82 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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28
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83 ngx_conf_set_str_slot,
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84 NGX_HTTP_SRV_CONF_OFFSET,
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85 offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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86 NULL },
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87
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196
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88 { ngx_string("ssl_verify_client"),
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216
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89 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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196
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90 ngx_conf_set_flag_slot,
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91 NGX_HTTP_SRV_CONF_OFFSET,
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92 offsetof(ngx_http_ssl_srv_conf_t, verify),
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93 NULL },
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94
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95 { ngx_string("ssl_verify_depth"),
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96 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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97 ngx_conf_set_num_slot,
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98 NGX_HTTP_SRV_CONF_OFFSET,
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99 offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
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100 NULL },
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101
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102 { ngx_string("ssl_client_certificate"),
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103 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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104 ngx_conf_set_str_slot,
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105 NGX_HTTP_SRV_CONF_OFFSET,
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106 offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
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107 NULL },
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108
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96
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109 { ngx_string("ssl_prefer_server_ciphers"),
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110 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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112
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111 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
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96
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112 ngx_conf_set_flag_slot,
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113 NGX_HTTP_SRV_CONF_OFFSET,
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114 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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115 NULL },
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112
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116 #else
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117 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 },
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118 #endif
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96
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119
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122
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120 { ngx_string("ssl_session_timeout"),
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121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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122 ngx_conf_set_sec_slot,
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123 NGX_HTTP_SRV_CONF_OFFSET,
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124 offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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125 NULL },
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126
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0
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127 ngx_null_command
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128 };
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129
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130
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131 static ngx_http_module_t ngx_http_ssl_module_ctx = {
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160
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132 ngx_http_ssl_add_variables, /* preconfiguration */
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58
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133 NULL, /* postconfiguration */
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0
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134
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90
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135 NULL, /* create main configuration */
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136 NULL, /* init main configuration */
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0
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137
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138 ngx_http_ssl_create_srv_conf, /* create server configuration */
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139 ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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140
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141 NULL, /* create location configuration */
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34
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142 NULL /* merge location configuration */
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0
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143 };
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144
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145
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146 ngx_module_t ngx_http_ssl_module = {
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58
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147 NGX_MODULE_V1,
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0
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148 &ngx_http_ssl_module_ctx, /* module context */
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149 ngx_http_ssl_commands, /* module directives */
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150 NGX_HTTP_MODULE, /* module type */
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90
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151 NULL, /* init master */
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0
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152 NULL, /* init module */
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90
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153 NULL, /* init process */
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154 NULL, /* init thread */
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155 NULL, /* exit thread */
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156 NULL, /* exit process */
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157 NULL, /* exit master */
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158 NGX_MODULE_V1_PADDING
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0
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159 };
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160
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161
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160
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162 static ngx_http_variable_t ngx_http_ssl_vars[] = {
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163
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186
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164 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_variable,
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160
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165 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 },
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166
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186
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167 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_variable,
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160
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168 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 },
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169
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196
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170 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_client_s_dn,
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171 0, NGX_HTTP_VAR_CHANGABLE, 0 },
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172
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173 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_client_i_dn,
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174 0, NGX_HTTP_VAR_CHANGABLE, 0 },
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175
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186
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176 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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160
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177 };
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178
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179
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92
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180 static u_char ngx_http_session_id_ctx[] = "HTTP";
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181
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182
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160
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183 static ngx_int_t
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184 ngx_http_ssl_variable(ngx_http_request_t *r,
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185 ngx_http_variable_value_t *v, uintptr_t data)
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186 {
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187 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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188
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189 size_t len;
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190 u_char *name;
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191
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192 if (r->connection->ssl) {
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193
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194 name = handler(r->connection);
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195
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196 for (len = 0; name[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 v->data = name;
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203
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204 return NGX_OK;
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205 }
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206
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207 v->not_found = 1;
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208
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209 return NGX_OK;
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210 }
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211
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212
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213 static ngx_int_t
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196
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214 ngx_http_ssl_client_s_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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215 uintptr_t data)
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216 {
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217 if (r->connection->ssl) {
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218 if (ngx_ssl_get_subject_dn(r->connection, r->pool, (ngx_str_t *) v)
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219 != NGX_OK)
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220 {
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221 return NGX_ERROR;
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222 }
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223
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224 if (v->len) {
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225 v->valid = 1;
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226 v->no_cachable = 0;
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227 v->not_found = 0;
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228
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229 return NGX_OK;
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230 }
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231 }
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232
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233 v->not_found = 1;
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234
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235 return NGX_OK;
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236 }
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237
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238
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239 static ngx_int_t
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240 ngx_http_ssl_client_i_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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241 uintptr_t data)
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242 {
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243 if (r->connection->ssl) {
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244 if (ngx_ssl_get_issuer_dn(r->connection, r->pool, (ngx_str_t *) v)
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245 != NGX_OK)
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246 {
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247 return NGX_ERROR;
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248 }
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249
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250 if (v->len) {
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251 v->valid = 1;
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252 v->no_cachable = 0;
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253 v->not_found = 0;
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254
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255 return NGX_OK;
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256 }
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257 }
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258
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259 v->not_found = 1;
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260
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261 return NGX_OK;
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262 }
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263
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264
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265 static ngx_int_t
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160
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266 ngx_http_ssl_add_variables(ngx_conf_t *cf)
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267 {
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268 ngx_http_variable_t *var, *v;
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269
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270 for (v = ngx_http_ssl_vars; v->name.len; v++) {
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271 var = ngx_http_add_variable(cf, &v->name, v->flags);
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272 if (var == NULL) {
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273 return NGX_ERROR;
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274 }
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275
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186
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276 var->get_handler = v->get_handler;
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160
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277 var->data = v->data;
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278 }
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279
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280 return NGX_OK;
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281 }
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282
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283
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50
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284 static void *
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285 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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0
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286 {
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287 ngx_http_ssl_srv_conf_t *scf;
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288
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50
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289 scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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290 if (scf == NULL) {
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0
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291 return NGX_CONF_ERROR;
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292 }
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293
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28
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294 /*
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295 * set by ngx_pcalloc():
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296 *
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297 * scf->protocols = 0;
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298
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28
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299 * scf->certificate.len = 0;
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300 * scf->certificate.data = NULL;
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301 * scf->certificate_key.len = 0;
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302 * scf->certificate_key.data = NULL;
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196
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303 * scf->client_certificate.len = 0;
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304 * scf->client_certificate.data = NULL;
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28
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305 * scf->ciphers.len = 0;
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306 * scf->ciphers.data = NULL;
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307 */
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308
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0
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309 scf->enable = NGX_CONF_UNSET;
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122
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310 scf->session_timeout = NGX_CONF_UNSET;
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196
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311 scf->verify = NGX_CONF_UNSET;
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312 scf->verify_depth = NGX_CONF_UNSET;
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96
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313 scf->prefer_server_ciphers = NGX_CONF_UNSET;
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0
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314
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315 return scf;
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316 }
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317
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318
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50
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319 static char *
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320 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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0
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321 {
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322 ngx_http_ssl_srv_conf_t *prev = parent;
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323 ngx_http_ssl_srv_conf_t *conf = child;
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324
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112
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325 ngx_pool_cleanup_t *cln;
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326
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0
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327 ngx_conf_merge_value(conf->enable, prev->enable, 0);
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328
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329 if (conf->enable == 0) {
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330 return NGX_CONF_OK;
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331 }
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332
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122
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333 ngx_conf_merge_value(conf->session_timeout,
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334 prev->session_timeout, 300);
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335
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96
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336 ngx_conf_merge_value(conf->prefer_server_ciphers,
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337 prev->prefer_server_ciphers, 0);
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338
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339 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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340 (NGX_CONF_BITMASK_SET
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341 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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342
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196
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343 ngx_conf_merge_value(conf->verify, prev->verify, 0);
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344 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1);
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345
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0
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346 ngx_conf_merge_str_value(conf->certificate, prev->certificate,
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96
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347 NGX_DEFLAUT_CERTIFICATE);
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0
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348
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349 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
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96
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350 NGX_DEFLAUT_CERTIFICATE_KEY);
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0
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351
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196
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352 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
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353 "");
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354
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96
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355 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
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28
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356
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357
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96
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358 conf->ssl.log = cf->log;
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0
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359
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96
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360 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) {
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0
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361 return NGX_CONF_ERROR;
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362 }
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363
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112
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364 cln = ngx_pool_cleanup_add(cf->pool, 0);
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365 if (cln == NULL) {
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58
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366 return NGX_CONF_ERROR;
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367 }
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368
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112
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369 cln->handler = ngx_ssl_cleanup_ctx;
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370 cln->data = &conf->ssl;
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371
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372 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
|
|
|
373 &conf->certificate_key) != NGX_OK)
|
|
78
|
374 {
|
|
0
|
375 return NGX_CONF_ERROR;
|
|
|
376 }
|
|
|
377
|
|
96
|
378 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
|
|
112
|
379 (const char *) conf->ciphers.data)
|
|
|
380 == 0)
|
|
78
|
381 {
|
|
0
|
382 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
|
|
96
|
383 "SSL_CTX_set_cipher_list(\"%V\") failed",
|
|
|
384 &conf->ciphers);
|
|
|
385 }
|
|
|
386
|
|
196
|
387 if (conf->verify) {
|
|
218
|
388 SSL_CTX_set_verify(conf->ssl.ctx, NGX_SSL_VERIFY,
|
|
|
389 ngx_http_ssl_verify_callback);
|
|
196
|
390
|
|
|
391 SSL_CTX_set_verify_depth(conf->ssl.ctx, conf->verify_depth);
|
|
|
392
|
|
|
393 if (conf->client_certificate.len) {
|
|
|
394 if (ngx_ssl_client_certificate(cf, &conf->ssl,
|
|
|
395 &conf->client_certificate)
|
|
|
396 != NGX_OK)
|
|
|
397 {
|
|
|
398 return NGX_CONF_ERROR;
|
|
|
399 }
|
|
|
400 }
|
|
|
401 }
|
|
|
402
|
|
112
|
403 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
|
|
|
404
|
|
96
|
405 if (conf->prefer_server_ciphers) {
|
|
|
406 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
|
|
|
407 }
|
|
|
408
|
|
112
|
409 #endif
|
|
|
410
|
|
96
|
411 /* a temporary 512-bit RSA key is required for export versions of MSIE */
|
|
|
412 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
|
|
0
|
413 return NGX_CONF_ERROR;
|
|
|
414 }
|
|
|
415
|
|
96
|
416 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER);
|
|
92
|
417
|
|
96
|
418 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx,
|
|
92
|
419 sizeof(ngx_http_session_id_ctx) - 1);
|
|
90
|
420
|
|
122
|
421 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout);
|
|
|
422
|
|
0
|
423 return NGX_CONF_OK;
|
|
|
424 }
|
|
112
|
425
|
|
|
426
|
|
218
|
427 static int
|
|
|
428 ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store)
|
|
|
429 {
|
|
|
430 return 1;
|
|
|
431 }
|
|
|
432
|
|
|
433
|
|
112
|
434 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
|
|
|
435
|
|
|
436 static char *
|
|
|
437 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
438 {
|
|
|
439 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
440 "\"%V\" directive is available only in %s,",
|
|
|
441 &cmd->name, cmd->post);
|
|
|
442
|
|
|
443 return NGX_CONF_ERROR;
|
|
|
444 }
|
|
|
445
|
|
|
446 #endif
|
