Mercurial > hg > nginx
annotate src/http/modules/ngx_http_auth_basic_module.c @ 2567:f0f64973ba2f
auth_basic_user_file supports variables
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 16 Mar 2009 07:13:22 +0000 |
| parents | fd4ee75c6eee |
| children | 5c8d9e3cbd8a |
| rev | line source |
|---|---|
| 503 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 12 #define NGX_HTTP_AUTH_BUF_SIZE 2048 | |
| 13 | |
| 14 | |
| 15 typedef struct { | |
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16 ngx_str_t passwd; |
| 503 | 17 } ngx_http_auth_basic_ctx_t; |
| 18 | |
| 19 | |
| 20 typedef struct { | |
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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; |
| 503 | 25 } ngx_http_auth_basic_loc_conf_t; |
| 26 | |
| 27 | |
| 28 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); | |
| 29 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
| 30 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); | |
| 31 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, | |
| 32 ngx_str_t *realm); | |
| 33 static void ngx_http_auth_basic_close(ngx_file_t *file); | |
| 34 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); | |
| 35 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, | |
| 36 void *parent, void *child); | |
| 681 | 37 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); |
| 503 | 38 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); |
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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); |
| 503 | 41 |
| 42 | |
| 43 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; | |
| 44 | |
| 45 static ngx_command_t ngx_http_auth_basic_commands[] = { | |
| 46 | |
| 47 { ngx_string("auth_basic"), | |
| 631 | 48 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
| 49 |NGX_CONF_TAKE1, | |
| 503 | 50 ngx_conf_set_str_slot, |
| 51 NGX_HTTP_LOC_CONF_OFFSET, | |
| 52 offsetof(ngx_http_auth_basic_loc_conf_t, realm), | |
| 53 &ngx_http_auth_basic_p }, | |
| 54 | |
| 55 { ngx_string("auth_basic_user_file"), | |
| 631 | 56 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
| 57 |NGX_CONF_TAKE1, | |
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58 ngx_http_auth_basic_user_file, |
| 503 | 59 NGX_HTTP_LOC_CONF_OFFSET, |
| 60 offsetof(ngx_http_auth_basic_loc_conf_t, user_file), | |
| 61 NULL }, | |
| 62 | |
| 63 ngx_null_command | |
| 64 }; | |
| 65 | |
| 66 | |
| 667 | 67 static ngx_http_module_t ngx_http_auth_basic_module_ctx = { |
| 509 | 68 NULL, /* preconfiguration */ |
| 681 | 69 ngx_http_auth_basic_init, /* postconfiguration */ |
| 503 | 70 |
| 71 NULL, /* create main configuration */ | |
| 72 NULL, /* init main configuration */ | |
| 73 | |
| 74 NULL, /* create server configuration */ | |
| 75 NULL, /* merge server configuration */ | |
| 76 | |
| 77 ngx_http_auth_basic_create_loc_conf, /* create location configuration */ | |
| 78 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ | |
| 79 }; | |
| 80 | |
| 81 | |
| 82 ngx_module_t ngx_http_auth_basic_module = { | |
| 509 | 83 NGX_MODULE_V1, |
| 503 | 84 &ngx_http_auth_basic_module_ctx, /* module context */ |
| 85 ngx_http_auth_basic_commands, /* module directives */ | |
| 86 NGX_HTTP_MODULE, /* module type */ | |
| 541 | 87 NULL, /* init master */ |
| 681 | 88 NULL, /* init module */ |
| 541 | 89 NULL, /* init process */ |
| 90 NULL, /* init thread */ | |
| 91 NULL, /* exit thread */ | |
| 92 NULL, /* exit process */ | |
| 93 NULL, /* exit master */ | |
| 94 NGX_MODULE_V1_PADDING | |
| 503 | 95 }; |
| 96 | |
| 97 | |
| 98 static ngx_int_t | |
| 99 ngx_http_auth_basic_handler(ngx_http_request_t *r) | |
| 100 { | |
| 101 off_t offset; | |
| 102 ssize_t n; | |
| 103 ngx_fd_t fd; | |
| 539 | 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; |
| 503 | 108 ngx_file_t file; |
| 109 ngx_http_auth_basic_ctx_t *ctx; | |
| 110 ngx_http_auth_basic_loc_conf_t *alcf; | |
| 111 u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; | |
| 112 enum { | |
| 113 sw_login, | |
| 114 sw_passwd, | |
| 115 sw_skip | |
| 116 } state; | |
| 117 | |
| 118 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); | |
| 119 | |
| 120 if (alcf->realm.len == 0 || alcf->user_file.len == 0) { | |
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121 return NGX_DECLINED; |
| 503 | 122 } |
| 123 | |
| 124 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); | |
| 125 | |
| 126 if (ctx) { | |
| 127 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, | |
| 128 &alcf->realm); | |
| 129 } | |
| 130 | |
| 539 | 131 rc = ngx_http_auth_basic_user(r); |
| 503 | 132 |
| 539 | 133 if (rc == NGX_DECLINED) { |
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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 |
| 503 | 138 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
| 139 } | |
| 140 | |
| 539 | 141 if (rc == NGX_ERROR) { |
| 503 | 142 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 143 } | |
| 144 | |
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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); |
| 503 | 160 |
| 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; |
| 503 | 177 } |
| 178 | |
| 179 ngx_memzero(&file, sizeof(ngx_file_t)); | |
| 180 | |
| 181 file.fd = fd; | |
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182 file.name = user_file; |
| 503 | 183 file.log = r->connection->log; |
| 184 | |
| 185 state = sw_login; | |
| 186 passwd = 0; | |
| 187 login = 0; | |
| 188 left = 0; | |
| 189 offset = 0; | |
| 190 | |
| 191 for ( ;; ) { | |
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192 i = left; |
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193 |
| 503 | 194 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, |
| 195 offset); | |
| 196 | |
| 197 if (n == NGX_ERROR) { | |
| 198 ngx_http_auth_basic_close(&file); | |
| 199 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 200 } | |
| 201 | |
| 202 if (n == 0) { | |
| 203 break; | |
| 204 } | |
| 205 | |
| 206 for (i = left; i < left + n; i++) { | |
| 207 switch (state) { | |
| 208 | |
| 209 case sw_login: | |
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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 } |
| 503 | 220 } |
| 221 | |
| 539 | 222 if (buf[i] != r->headers_in.user.data[login]) { |
| 503 | 223 state = sw_skip; |
| 224 break; | |
| 225 } | |
| 226 | |
| 539 | 227 if (login == r->headers_in.user.len) { |
| 503 | 228 state = sw_passwd; |
| 229 passwd = i + 1; | |
| 230 } | |
| 231 | |
| 232 login++; | |
| 233 | |
| 234 break; | |
| 235 | |
| 236 case sw_passwd: | |
| 237 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { | |
| 238 buf[i] = '\0'; | |
| 239 | |
| 240 ngx_http_auth_basic_close(&file); | |
| 241 | |
| 242 pwd.len = i - passwd; | |
| 243 pwd.data = &buf[passwd]; | |
| 244 | |
| 245 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, | |
| 246 &alcf->realm); | |
| 247 } | |
| 248 | |
| 249 break; | |
| 250 | |
| 251 case sw_skip: | |
| 252 if (buf[i] == LF) { | |
| 253 state = sw_login; | |
| 254 login = 0; | |
| 255 } | |
| 256 | |
| 257 break; | |
| 258 } | |
| 259 } | |
| 260 | |
| 261 if (state == sw_passwd) { | |
| 262 left = left + n - passwd; | |
| 263 ngx_memcpy(buf, &buf[passwd], left); | |
| 264 passwd = 0; | |
| 265 | |
| 266 } else { | |
| 267 left = 0; | |
| 268 } | |
| 269 | |
| 270 offset += n; | |
| 271 } | |
| 272 | |
| 273 ngx_http_auth_basic_close(&file); | |
| 274 | |
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275 if (state == sw_passwd) { |
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276 pwd.len = i - passwd; |
| 2049 | 277 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); |
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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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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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290 |
| 503 | 291 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
| 292 } | |
| 293 | |
| 294 | |
| 295 static ngx_int_t | |
| 296 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
| 297 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) | |
| 298 { | |
| 299 ngx_int_t rc; | |
| 300 u_char *encrypted; | |
| 301 | |
| 302 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, | |
| 303 &encrypted); | |
| 304 | |
| 305 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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306 "rc: %d user: \"%V\" salt: \"%s\"", |
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307 rc, &r->headers_in.user, passwd->data); |
| 503 | 308 |
| 309 if (rc == NGX_OK) { | |
| 310 if (ngx_strcmp(encrypted, passwd->data) == 0) { | |
| 311 return NGX_OK; | |
| 312 } | |
| 313 | |
| 314 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 315 "encrypted: \"%s\"", encrypted); | |
| 316 | |
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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 |
| 503 | 321 return ngx_http_auth_basic_set_realm(r, realm); |
| 322 } | |
| 323 | |
| 324 if (rc == NGX_ERROR) { | |
| 325 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 326 } | |
| 327 | |
| 328 /* rc == NGX_AGAIN */ | |
| 329 | |
| 330 if (ctx == NULL) { | |
| 331 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); | |
| 332 if (ctx == NULL) { | |
| 333 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 334 } | |
| 335 | |
| 336 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); | |
| 337 | |
| 338 ctx->passwd.len = passwd->len; | |
| 339 passwd->len++; | |
| 340 | |
| 341 ctx->passwd.data = ngx_pstrdup(r->pool, passwd); | |
| 342 if (ctx->passwd.data == NULL) { | |
| 343 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 344 } | |
| 345 | |
| 346 } | |
| 347 | |
| 348 /* TODO: add mutex event */ | |
| 349 | |
| 350 return rc; | |
| 351 } | |
| 352 | |
| 353 | |
| 354 static ngx_int_t | |
| 355 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) | |
| 356 { | |
| 357 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); | |
| 358 if (r->headers_out.www_authenticate == NULL) { | |
| 359 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 360 } | |
| 361 | |
| 509 | 362 r->headers_out.www_authenticate->hash = 1; |
| 503 | 363 r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1; |
| 364 r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate"; | |
| 365 r->headers_out.www_authenticate->value = *realm; | |
| 366 | |
| 367 return NGX_HTTP_UNAUTHORIZED; | |
| 368 } | |
| 369 | |
| 370 static void | |
| 371 ngx_http_auth_basic_close(ngx_file_t *file) | |
| 372 { | |
| 373 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 374 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno, | |
| 375 ngx_close_file_n " \"%s\" failed", file->name.data); | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 | |
| 380 static void * | |
| 381 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) | |
| 382 { | |
| 383 ngx_http_auth_basic_loc_conf_t *conf; | |
| 384 | |
| 385 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t)); | |
| 386 if (conf == NULL) { | |
| 387 return NGX_CONF_ERROR; | |
| 388 } | |
| 389 | |
| 390 return conf; | |
| 391 } | |
| 392 | |
| 393 | |
| 394 static char * | |
| 395 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 396 { | |
| 397 ngx_http_auth_basic_loc_conf_t *prev = parent; | |
| 398 ngx_http_auth_basic_loc_conf_t *conf = child; | |
| 399 | |
| 581 | 400 if (conf->realm.data == NULL) { |
| 503 | 401 conf->realm = prev->realm; |
| 402 } | |
| 403 | |
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404 if (conf->user_file.data == NULL) { |
| 503 | 405 conf->user_file = prev->user_file; |
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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; |
| 503 | 408 } |
| 409 | |
| 410 return NGX_CONF_OK; | |
| 411 } | |
| 412 | |
| 413 | |
| 414 static ngx_int_t | |
| 681 | 415 ngx_http_auth_basic_init(ngx_conf_t *cf) |
| 503 | 416 { |
| 417 ngx_http_handler_pt *h; | |
| 418 ngx_http_core_main_conf_t *cmcf; | |
| 419 | |
| 681 | 420 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
| 503 | 421 |
| 422 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); | |
| 423 if (h == NULL) { | |
| 424 return NGX_ERROR; | |
| 425 } | |
| 426 | |
| 427 *h = ngx_http_auth_basic_handler; | |
| 428 | |
| 429 return NGX_OK; | |
| 430 } | |
| 431 | |
| 432 | |
| 433 static char * | |
| 434 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data) | |
| 435 { | |
| 436 ngx_str_t *realm = data; | |
| 437 | |
| 581 | 438 size_t len; |
| 439 u_char *basic, *p; | |
| 440 | |
| 503 | 441 if (ngx_strcmp(realm->data, "off") == 0) { |
| 442 realm->len = 0; | |
| 443 realm->data = (u_char *) ""; | |
| 583 | 444 |
| 445 return NGX_CONF_OK; | |
| 503 | 446 } |
| 447 | |
| 581 | 448 len = sizeof("Basic realm=\"") - 1 + realm->len + 1; |
| 449 | |
| 2049 | 450 basic = ngx_pnalloc(cf->pool, len); |
| 581 | 451 if (basic == NULL) { |
| 452 return NGX_CONF_ERROR; | |
| 453 } | |
| 454 | |
| 455 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); | |
| 456 p = ngx_cpymem(p, realm->data, realm->len); | |
| 457 *p = '"'; | |
| 458 | |
| 459 realm->len = len; | |
| 460 realm->data = basic; | |
| 461 | |
| 503 | 462 return NGX_CONF_OK; |
| 463 } | |
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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_core_loc_conf_t *clcf; |
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474 ngx_http_script_compile_t sc; |
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475 |
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476 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); |
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477 |
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478 if (alcf->user_file.data) { |
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479 return "is duplicate"; |
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480 } |
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481 |
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482 value = cf->args->elts; |
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483 |
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484 alcf->user_file = value[1]; |
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485 |
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486 if (alcf->user_file.len == 0) { |
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487 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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488 "invalid parameter \"%V\"", &alcf->user_file); |
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489 return NGX_CONF_ERROR; |
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490 } |
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491 |
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492 if (alcf->user_file.data[0] != '$') { |
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493 if (ngx_conf_full_name(cf->cycle, &alcf->user_file, 1) != NGX_OK) { |
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494 return NGX_CONF_ERROR; |
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495 } |
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496 } |
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497 |
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498 n = ngx_http_script_variables_count(&alcf->user_file); |
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499 |
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500 if (n == 0) { |
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501 return NGX_CONF_OK; |
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502 } |
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503 |
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504 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); |
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505 |
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506 sc.cf = cf; |
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507 sc.source = &alcf->user_file; |
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508 sc.lengths = &alcf->user_file_lengths; |
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509 sc.values = &alcf->user_file_values; |
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510 sc.variables = n; |
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511 sc.complete_lengths = 1; |
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512 sc.complete_values = 1; |
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513 |
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514 if (ngx_http_script_compile(&sc) != NGX_OK) { |
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515 return NGX_CONF_ERROR; |
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516 } |
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517 |
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518 return NGX_CONF_OK; |
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519 } |