52
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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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11
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12 #define NGX_HTTP_AUTH_BUF_SIZE 2048
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13
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14
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15 typedef struct {
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460
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16 ngx_str_t passwd;
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52
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17 } ngx_http_auth_basic_ctx_t;
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18
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19
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20 typedef struct {
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460
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21 ngx_str_t realm;
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22 ngx_str_t user_file;
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23 ngx_array_t *user_file_lengths;
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24 ngx_array_t *user_file_values;
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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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52
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38 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data);
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460
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39 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd,
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40 void *conf);
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52
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41
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42
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43 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic;
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44
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45 static ngx_command_t ngx_http_auth_basic_commands[] = {
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46
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47 { ngx_string("auth_basic"),
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180
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48 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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49 |NGX_CONF_TAKE1,
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52
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50 ngx_conf_set_str_slot,
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51 NGX_HTTP_LOC_CONF_OFFSET,
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52 offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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53 &ngx_http_auth_basic_p },
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54
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55 { ngx_string("auth_basic_user_file"),
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180
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56 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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57 |NGX_CONF_TAKE1,
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460
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58 ngx_http_auth_basic_user_file,
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59 NGX_HTTP_LOC_CONF_OFFSET,
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60 offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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61 NULL },
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62
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63 ngx_null_command
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64 };
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65
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66
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216
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67 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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68 NULL, /* preconfiguration */
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230
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69 ngx_http_auth_basic_init, /* postconfiguration */
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70
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71 NULL, /* create main configuration */
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72 NULL, /* init main configuration */
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73
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74 NULL, /* create server configuration */
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75 NULL, /* merge server configuration */
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76
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77 ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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78 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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79 };
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80
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81
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82 ngx_module_t ngx_http_auth_basic_module = {
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83 NGX_MODULE_V1,
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84 &ngx_http_auth_basic_module_ctx, /* module context */
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85 ngx_http_auth_basic_commands, /* module directives */
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86 NGX_HTTP_MODULE, /* module type */
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90
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87 NULL, /* init master */
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230
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88 NULL, /* init module */
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90
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89 NULL, /* init process */
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90 NULL, /* init thread */
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91 NULL, /* exit thread */
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92 NULL, /* exit process */
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93 NULL, /* exit master */
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94 NGX_MODULE_V1_PADDING
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52
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95 };
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96
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97
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98 static ngx_int_t
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99 ngx_http_auth_basic_handler(ngx_http_request_t *r)
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100 {
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101 off_t offset;
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102 ssize_t n;
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103 ngx_fd_t fd;
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104 ngx_int_t rc;
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105 ngx_err_t err;
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106 ngx_str_t pwd, user_file;
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107 ngx_uint_t i, level, login, left, passwd;
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108 ngx_file_t file;
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109 ngx_http_auth_basic_ctx_t *ctx;
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110 ngx_http_auth_basic_loc_conf_t *alcf;
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111 u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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112 enum {
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113 sw_login,
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114 sw_passwd,
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115 sw_skip
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116 } state;
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117
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118 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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119
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120 if (alcf->realm.len == 0 || alcf->user_file.len == 0) {
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121 return NGX_DECLINED;
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52
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122 }
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123
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124 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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125
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126 if (ctx) {
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127 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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128 &alcf->realm);
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129 }
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130
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88
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131 rc = ngx_http_auth_basic_user(r);
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132
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88
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133 if (rc == NGX_DECLINED) {
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452
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134
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135 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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136 "no user/password was provided for basic authentication");
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137
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138 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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139 }
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140
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141 if (rc == NGX_ERROR) {
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142 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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143 }
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144
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460
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145 if (alcf->user_file_lengths) {
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146 if (ngx_http_script_run(r, &user_file, alcf->user_file_lengths->elts, 1,
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147 alcf->user_file_values->elts)
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148 == NULL)
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149 {
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150 return NGX_ERROR;
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151 }
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152
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153 user_file.data[--user_file.len] = '\0';
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154
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155 } else {
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156 user_file = alcf->user_file;
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157 }
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158
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159 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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160
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161 if (fd == NGX_INVALID_FILE) {
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162 err = ngx_errno;
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163
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164 if (err == NGX_ENOENT) {
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165 level = NGX_LOG_ERR;
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166 rc = NGX_HTTP_FORBIDDEN;
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167
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168 } else {
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169 level = NGX_LOG_CRIT;
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170 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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171 }
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172
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173 ngx_log_error(level, r->connection->log, err,
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174 ngx_open_file_n " \"%s\" failed", user_file.data);
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175
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176 return rc;
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52
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177 }
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178
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179 ngx_memzero(&file, sizeof(ngx_file_t));
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180
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181 file.fd = fd;
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182 file.name = user_file;
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183 file.log = r->connection->log;
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184
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185 state = sw_login;
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186 passwd = 0;
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187 login = 0;
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188 left = 0;
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189 offset = 0;
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190
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191 for ( ;; ) {
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192 i = left;
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193
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194 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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195 offset);
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196
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197 if (n == NGX_ERROR) {
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198 ngx_http_auth_basic_close(&file);
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199 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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200 }
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201
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202 if (n == 0) {
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203 break;
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204 }
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205
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206 for (i = left; i < left + n; i++) {
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207 switch (state) {
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208
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209 case sw_login:
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452
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210 if (login == 0) {
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211
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212 if (buf[i] == '#' || buf[i] == CR) {
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213 state = sw_skip;
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214 break;
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215 }
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216
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217 if (buf[i] == LF) {
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218 break;
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219 }
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220 }
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221
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222 if (buf[i] != r->headers_in.user.data[login]) {
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223 state = sw_skip;
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224 break;
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225 }
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226
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227 if (login == r->headers_in.user.len) {
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228 state = sw_passwd;
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229 passwd = i + 1;
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230 }
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231
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232 login++;
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233
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234 break;
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235
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236 case sw_passwd:
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237 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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238 buf[i] = '\0';
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239
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240 ngx_http_auth_basic_close(&file);
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241
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242 pwd.len = i - passwd;
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243 pwd.data = &buf[passwd];
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244
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245 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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246 &alcf->realm);
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247 }
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248
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249 break;
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250
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251 case sw_skip:
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252 if (buf[i] == LF) {
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253 state = sw_login;
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254 login = 0;
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255 }
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256
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257 break;
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258 }
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259 }
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260
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261 if (state == sw_passwd) {
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262 left = left + n - passwd;
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263 ngx_memcpy(buf, &buf[passwd], left);
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264 passwd = 0;
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265
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266 } else {
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267 left = 0;
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268 }
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269
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270 offset += n;
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271 }
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272
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273 ngx_http_auth_basic_close(&file);
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274
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262
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275 if (state == sw_passwd) {
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276 pwd.len = i - passwd;
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382
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277 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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262
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278 if (pwd.data == NULL) {
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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280 }
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281
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282 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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283
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284 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm);
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285 }
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286
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452
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287 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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288 "user \"%V\" was not found in \"%V\"",
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289 &r->headers_in.user, &user_file);
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452
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290
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291 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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292 }
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293
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294
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295 static ngx_int_t
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296 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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297 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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298 {
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299 ngx_int_t rc;
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300 u_char *encrypted;
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301
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302 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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303 &encrypted);
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304
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305 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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452
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306 "rc: %d user: \"%V\" salt: \"%s\"",
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307 rc, &r->headers_in.user, passwd->data);
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308
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309 if (rc == NGX_OK) {
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310 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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311 return NGX_OK;
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312 }
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313
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314 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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315 "encrypted: \"%s\"", encrypted);
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316
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452
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317 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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318 "user \"%V\": password mismatch",
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319 &r->headers_in.user);
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320
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321 return ngx_http_auth_basic_set_realm(r, realm);
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322 }
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323
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324 if (rc == NGX_ERROR) {
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325 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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326 }
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327
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328 /* rc == NGX_AGAIN */
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329
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330 if (ctx == NULL) {
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331 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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332 if (ctx == NULL) {
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333 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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334 }
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335
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336 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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337
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338 ctx->passwd.len = passwd->len;
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339 passwd->len++;
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340
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341 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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342 if (ctx->passwd.data == NULL) {
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343 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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344 }
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345
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346 }
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347
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348 /* TODO: add mutex event */
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349
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350 return rc;
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351 }
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352
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353
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354 static ngx_int_t
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355 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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356 {
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357 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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358 if (r->headers_out.www_authenticate == NULL) {
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359 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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360 }
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361
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58
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362 r->headers_out.www_authenticate->hash = 1;
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363 r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1;
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364 r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate";
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365 r->headers_out.www_authenticate->value = *realm;
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366
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367 return NGX_HTTP_UNAUTHORIZED;
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368 }
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369
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370 static void
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371 ngx_http_auth_basic_close(ngx_file_t *file)
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372 {
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373 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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374 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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375 ngx_close_file_n " \"%s\" failed", file->name.data);
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376 }
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377 }
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378
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379
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380 static void *
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381 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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382 {
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383 ngx_http_auth_basic_loc_conf_t *conf;
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384
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385 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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386 if (conf == NULL) {
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387 return NGX_CONF_ERROR;
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388 }
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389
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390 return conf;
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391 }
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392
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393
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394 static char *
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395 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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396 {
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397 ngx_http_auth_basic_loc_conf_t *prev = parent;
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398 ngx_http_auth_basic_loc_conf_t *conf = child;
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399
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130
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400 if (conf->realm.data == NULL) {
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52
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401 conf->realm = prev->realm;
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402 }
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403
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460
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404 if (conf->user_file.data == NULL) {
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52
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405 conf->user_file = prev->user_file;
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460
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406 conf->user_file_lengths = prev->user_file_lengths;
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407 conf->user_file_values = prev->user_file_values;
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52
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408 }
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409
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410 return NGX_CONF_OK;
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411 }
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412
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413
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414 static ngx_int_t
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230
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415 ngx_http_auth_basic_init(ngx_conf_t *cf)
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52
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416 {
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417 ngx_http_handler_pt *h;
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418 ngx_http_core_main_conf_t *cmcf;
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419
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230
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420 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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52
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421
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422 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
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423 if (h == NULL) {
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424 return NGX_ERROR;
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425 }
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426
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427 *h = ngx_http_auth_basic_handler;
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428
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429 return NGX_OK;
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430 }
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431
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432
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433 static char *
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434 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
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435 {
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436 ngx_str_t *realm = data;
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437
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130
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438 size_t len;
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439 u_char *basic, *p;
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440
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52
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441 if (ngx_strcmp(realm->data, "off") == 0) {
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442 realm->len = 0;
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443 realm->data = (u_char *) "";
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132
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444
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445 return NGX_CONF_OK;
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52
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446 }
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447
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130
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448 len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
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449
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382
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450 basic = ngx_pnalloc(cf->pool, len);
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130
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451 if (basic == NULL) {
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452 return NGX_CONF_ERROR;
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453 }
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454
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455 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
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456 p = ngx_cpymem(p, realm->data, realm->len);
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457 *p = '"';
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458
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459 realm->len = len;
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460 realm->data = basic;
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461
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52
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462 return NGX_CONF_OK;
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463 }
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460
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464
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465
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466 static char *
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467 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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468 {
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469 ngx_http_auth_basic_loc_conf_t *alcf = conf;
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470
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471 ngx_str_t *value;
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472 ngx_uint_t n;
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473 ngx_http_script_compile_t sc;
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474
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475 if (alcf->user_file.data) {
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476 return "is duplicate";
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477 }
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478
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479 value = cf->args->elts;
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480
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481 alcf->user_file = value[1];
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482
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483 if (alcf->user_file.len == 0) {
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484 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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485 "invalid parameter \"%V\"", &alcf->user_file);
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486 return NGX_CONF_ERROR;
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487 }
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488
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489 if (alcf->user_file.data[0] != '$') {
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490 if (ngx_conf_full_name(cf->cycle, &alcf->user_file, 1) != NGX_OK) {
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491 return NGX_CONF_ERROR;
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492 }
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493 }
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494
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495 n = ngx_http_script_variables_count(&alcf->user_file);
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496
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497 if (n == 0) {
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498 return NGX_CONF_OK;
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499 }
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500
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501 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
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502
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503 sc.cf = cf;
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504 sc.source = &alcf->user_file;
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505 sc.lengths = &alcf->user_file_lengths;
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506 sc.values = &alcf->user_file_values;
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507 sc.variables = n;
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508 sc.complete_lengths = 1;
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509 sc.complete_values = 1;
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510
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511 if (ngx_http_script_compile(&sc) != NGX_OK) {
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512 return NGX_CONF_ERROR;
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513 }
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514
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515 return NGX_CONF_OK;
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516 }
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