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52
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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52
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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626
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11 #include <ngx_crypt.h>
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52
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12
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13
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14 #define NGX_HTTP_AUTH_BUF_SIZE 2048
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15
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16
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17 typedef struct {
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464
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18 ngx_str_t passwd;
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52
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19 } ngx_http_auth_basic_ctx_t;
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20
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21
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22 typedef struct {
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694
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23 ngx_http_complex_value_t *realm;
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24 ngx_http_complex_value_t user_file;
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52
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25 } ngx_http_auth_basic_loc_conf_t;
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26
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27
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28 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r);
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29 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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30 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm);
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31 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r,
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32 ngx_str_t *realm);
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33 static void ngx_http_auth_basic_close(ngx_file_t *file);
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34 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf);
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35 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf,
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36 void *parent, void *child);
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230
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37 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf);
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460
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38 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd,
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39 void *conf);
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52
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40
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41
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42 static ngx_command_t ngx_http_auth_basic_commands[] = {
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43
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44 { ngx_string("auth_basic"),
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180
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45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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46 |NGX_CONF_TAKE1,
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694
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47 ngx_http_set_complex_value_slot,
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52
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48 NGX_HTTP_LOC_CONF_OFFSET,
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49 offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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694
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50 NULL },
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52
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51
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52 { ngx_string("auth_basic_user_file"),
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180
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53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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54 |NGX_CONF_TAKE1,
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460
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55 ngx_http_auth_basic_user_file,
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52
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56 NGX_HTTP_LOC_CONF_OFFSET,
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57 offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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58 NULL },
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59
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60 ngx_null_command
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61 };
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62
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63
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216
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64 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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58
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65 NULL, /* preconfiguration */
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230
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66 ngx_http_auth_basic_init, /* postconfiguration */
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67
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68 NULL, /* create main configuration */
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69 NULL, /* init main configuration */
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70
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71 NULL, /* create server configuration */
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72 NULL, /* merge server configuration */
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73
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74 ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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75 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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76 };
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77
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78
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79 ngx_module_t ngx_http_auth_basic_module = {
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58
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80 NGX_MODULE_V1,
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52
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81 &ngx_http_auth_basic_module_ctx, /* module context */
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82 ngx_http_auth_basic_commands, /* module directives */
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83 NGX_HTTP_MODULE, /* module type */
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90
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84 NULL, /* init master */
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230
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85 NULL, /* init module */
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90
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86 NULL, /* init process */
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87 NULL, /* init thread */
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88 NULL, /* exit thread */
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89 NULL, /* exit process */
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90 NULL, /* exit master */
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91 NGX_MODULE_V1_PADDING
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52
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92 };
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93
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94
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95 static ngx_int_t
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96 ngx_http_auth_basic_handler(ngx_http_request_t *r)
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97 {
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98 off_t offset;
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99 ssize_t n;
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100 ngx_fd_t fd;
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88
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101 ngx_int_t rc;
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460
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102 ngx_err_t err;
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694
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103 ngx_str_t pwd, realm, user_file;
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460
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104 ngx_uint_t i, level, login, left, passwd;
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52
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105 ngx_file_t file;
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106 ngx_http_auth_basic_ctx_t *ctx;
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107 ngx_http_auth_basic_loc_conf_t *alcf;
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108 u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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109 enum {
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110 sw_login,
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111 sw_passwd,
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112 sw_skip
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113 } state;
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114
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115 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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116
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694
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117 if (alcf->realm == NULL || alcf->user_file.value.data == NULL) {
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118 return NGX_DECLINED;
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119 }
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120
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121 if (ngx_http_complex_value(r, alcf->realm, &realm) != NGX_OK) {
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122 return NGX_ERROR;
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123 }
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124
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125 if (realm.len == 3 && ngx_strncmp(realm.data, "off", 3) == 0) {
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358
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126 return NGX_DECLINED;
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52
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127 }
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128
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129 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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130
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131 if (ctx) {
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132 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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694
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133 &realm);
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52
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134 }
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135
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88
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136 rc = ngx_http_auth_basic_user(r);
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52
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137
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88
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138 if (rc == NGX_DECLINED) {
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452
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139
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140 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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141 "no user/password was provided for basic authentication");
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142
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694
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143 return ngx_http_auth_basic_set_realm(r, &realm);
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52
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144 }
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145
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88
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146 if (rc == NGX_ERROR) {
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147 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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148 }
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149
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464
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150 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) {
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151 return NGX_ERROR;
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460
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152 }
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153
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154 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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52
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155
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156 if (fd == NGX_INVALID_FILE) {
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460
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157 err = ngx_errno;
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158
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159 if (err == NGX_ENOENT) {
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160 level = NGX_LOG_ERR;
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161 rc = NGX_HTTP_FORBIDDEN;
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162
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163 } else {
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164 level = NGX_LOG_CRIT;
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165 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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166 }
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167
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168 ngx_log_error(level, r->connection->log, err,
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169 ngx_open_file_n " \"%s\" failed", user_file.data);
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170
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171 return rc;
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52
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172 }
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173
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174 ngx_memzero(&file, sizeof(ngx_file_t));
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175
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176 file.fd = fd;
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460
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177 file.name = user_file;
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52
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178 file.log = r->connection->log;
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179
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180 state = sw_login;
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181 passwd = 0;
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182 login = 0;
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183 left = 0;
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184 offset = 0;
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185
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186 for ( ;; ) {
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262
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187 i = left;
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188
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189 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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190 offset);
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191
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192 if (n == NGX_ERROR) {
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193 ngx_http_auth_basic_close(&file);
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194 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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195 }
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196
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197 if (n == 0) {
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198 break;
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199 }
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200
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201 for (i = left; i < left + n; i++) {
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202 switch (state) {
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203
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204 case sw_login:
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452
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205 if (login == 0) {
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206
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207 if (buf[i] == '#' || buf[i] == CR) {
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208 state = sw_skip;
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209 break;
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210 }
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211
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212 if (buf[i] == LF) {
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213 break;
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214 }
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52
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215 }
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216
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88
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217 if (buf[i] != r->headers_in.user.data[login]) {
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218 state = sw_skip;
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219 break;
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220 }
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221
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88
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222 if (login == r->headers_in.user.len) {
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52
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223 state = sw_passwd;
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224 passwd = i + 1;
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225 }
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226
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227 login++;
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228
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229 break;
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230
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231 case sw_passwd:
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232 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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233 buf[i] = '\0';
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234
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235 ngx_http_auth_basic_close(&file);
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236
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237 pwd.len = i - passwd;
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238 pwd.data = &buf[passwd];
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239
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240 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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694
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241 &realm);
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52
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242 }
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243
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244 break;
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245
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246 case sw_skip:
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247 if (buf[i] == LF) {
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248 state = sw_login;
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249 login = 0;
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250 }
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251
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252 break;
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253 }
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254 }
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255
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256 if (state == sw_passwd) {
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257 left = left + n - passwd;
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620
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258 ngx_memmove(buf, &buf[passwd], left);
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52
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259 passwd = 0;
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260
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261 } else {
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262 left = 0;
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263 }
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264
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265 offset += n;
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266 }
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267
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268 ngx_http_auth_basic_close(&file);
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269
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262
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270 if (state == sw_passwd) {
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271 pwd.len = i - passwd;
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382
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272 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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262
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273 if (pwd.data == NULL) {
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274 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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275 }
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276
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277 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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278
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694
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279 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &realm);
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262
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280 }
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281
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452
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282 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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283 "user \"%V\" was not found in \"%V\"",
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460
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284 &r->headers_in.user, &user_file);
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452
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285
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694
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286 return ngx_http_auth_basic_set_realm(r, &realm);
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52
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287 }
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288
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289
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290 static ngx_int_t
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291 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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292 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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293 {
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294 ngx_int_t rc;
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295 u_char *encrypted;
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296
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297 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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298 &encrypted);
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299
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300 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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452
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301 "rc: %d user: \"%V\" salt: \"%s\"",
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302 rc, &r->headers_in.user, passwd->data);
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52
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303
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304 if (rc == NGX_OK) {
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305 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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306 return NGX_OK;
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307 }
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308
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309 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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310 "encrypted: \"%s\"", encrypted);
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311
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452
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312 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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313 "user \"%V\": password mismatch",
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314 &r->headers_in.user);
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315
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52
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316 return ngx_http_auth_basic_set_realm(r, realm);
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317 }
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318
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319 if (rc == NGX_ERROR) {
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320 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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321 }
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322
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323 /* rc == NGX_AGAIN */
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324
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325 if (ctx == NULL) {
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326 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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327 if (ctx == NULL) {
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328 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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329 }
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330
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331 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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332
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333 ctx->passwd.len = passwd->len;
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334 passwd->len++;
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335
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336 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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337 if (ctx->passwd.data == NULL) {
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338 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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339 }
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340
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341 }
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342
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343 /* TODO: add mutex event */
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344
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345 return rc;
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346 }
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347
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348
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349 static ngx_int_t
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350 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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351 {
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694
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352 size_t len;
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353 u_char *basic, *p;
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354
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52
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355 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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356 if (r->headers_out.www_authenticate == NULL) {
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357 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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358 }
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359
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694
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360 len = sizeof("Basic realm=\"\"") - 1 + realm->len;
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361
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362 basic = ngx_pnalloc(r->pool, len);
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363 if (basic == NULL) {
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364 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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365 }
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366
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367 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
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368 p = ngx_cpymem(p, realm->data, realm->len);
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369 *p = '"';
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370
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58
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371 r->headers_out.www_authenticate->hash = 1;
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570
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372 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate");
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694
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373 r->headers_out.www_authenticate->value.data = basic;
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374 r->headers_out.www_authenticate->value.len = len;
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52
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375
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376 return NGX_HTTP_UNAUTHORIZED;
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377 }
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378
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379 static void
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380 ngx_http_auth_basic_close(ngx_file_t *file)
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381 {
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382 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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383 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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384 ngx_close_file_n " \"%s\" failed", file->name.data);
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385 }
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386 }
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387
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388
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389 static void *
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390 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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391 {
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392 ngx_http_auth_basic_loc_conf_t *conf;
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393
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394 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
|
|
|
395 if (conf == NULL) {
|
|
496
|
396 return NULL;
|
|
52
|
397 }
|
|
|
398
|
|
|
399 return conf;
|
|
|
400 }
|
|
|
401
|
|
|
402
|
|
|
403 static char *
|
|
|
404 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
405 {
|
|
|
406 ngx_http_auth_basic_loc_conf_t *prev = parent;
|
|
|
407 ngx_http_auth_basic_loc_conf_t *conf = child;
|
|
|
408
|
|
694
|
409 if (conf->realm == NULL) {
|
|
52
|
410 conf->realm = prev->realm;
|
|
|
411 }
|
|
|
412
|
|
694
|
413 if (conf->user_file.value.data == NULL) {
|
|
52
|
414 conf->user_file = prev->user_file;
|
|
|
415 }
|
|
|
416
|
|
|
417 return NGX_CONF_OK;
|
|
|
418 }
|
|
|
419
|
|
|
420
|
|
|
421 static ngx_int_t
|
|
230
|
422 ngx_http_auth_basic_init(ngx_conf_t *cf)
|
|
52
|
423 {
|
|
|
424 ngx_http_handler_pt *h;
|
|
|
425 ngx_http_core_main_conf_t *cmcf;
|
|
|
426
|
|
230
|
427 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
52
|
428
|
|
|
429 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
|
|
|
430 if (h == NULL) {
|
|
|
431 return NGX_ERROR;
|
|
|
432 }
|
|
|
433
|
|
|
434 *h = ngx_http_auth_basic_handler;
|
|
|
435
|
|
|
436 return NGX_OK;
|
|
|
437 }
|
|
|
438
|
|
|
439
|
|
|
440 static char *
|
|
460
|
441 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
442 {
|
|
|
443 ngx_http_auth_basic_loc_conf_t *alcf = conf;
|
|
|
444
|
|
464
|
445 ngx_str_t *value;
|
|
|
446 ngx_http_compile_complex_value_t ccv;
|
|
460
|
447
|
|
694
|
448 if (alcf->user_file.value.data) {
|
|
460
|
449 return "is duplicate";
|
|
|
450 }
|
|
|
451
|
|
|
452 value = cf->args->elts;
|
|
|
453
|
|
464
|
454 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
460
|
455
|
|
464
|
456 ccv.cf = cf;
|
|
|
457 ccv.value = &value[1];
|
|
|
458 ccv.complex_value = &alcf->user_file;
|
|
|
459 ccv.zero = 1;
|
|
|
460 ccv.conf_prefix = 1;
|
|
460
|
461
|
|
464
|
462 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
460
|
463 return NGX_CONF_ERROR;
|
|
|
464 }
|
|
|
465
|
|
|
466 return NGX_CONF_OK;
|
|
|
467 }
|
