Mercurial > hg > nginx
annotate src/http/modules/ngx_http_auth_basic_module.c @ 2782:4bd7825fab80
uniform ngx_file_info() interface with ngx_fd_info()
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 29 Apr 2009 19:28:52 +0000 |
parents | a6954ce88b80 |
children | c7d57b539248 |
rev | line source |
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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_http_complex_value_t user_file; |
503 | 23 } ngx_http_auth_basic_loc_conf_t; |
24 | |
25 | |
26 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); | |
27 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
28 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); | |
29 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, | |
30 ngx_str_t *realm); | |
31 static void ngx_http_auth_basic_close(ngx_file_t *file); | |
32 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); | |
33 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, | |
34 void *parent, void *child); | |
681 | 35 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); |
503 | 36 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); |
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37 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, |
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38 void *conf); |
503 | 39 |
40 | |
41 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; | |
42 | |
43 static ngx_command_t ngx_http_auth_basic_commands[] = { | |
44 | |
45 { ngx_string("auth_basic"), | |
631 | 46 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
47 |NGX_CONF_TAKE1, | |
503 | 48 ngx_conf_set_str_slot, |
49 NGX_HTTP_LOC_CONF_OFFSET, | |
50 offsetof(ngx_http_auth_basic_loc_conf_t, realm), | |
51 &ngx_http_auth_basic_p }, | |
52 | |
53 { ngx_string("auth_basic_user_file"), | |
631 | 54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
55 |NGX_CONF_TAKE1, | |
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56 ngx_http_auth_basic_user_file, |
503 | 57 NGX_HTTP_LOC_CONF_OFFSET, |
58 offsetof(ngx_http_auth_basic_loc_conf_t, user_file), | |
59 NULL }, | |
60 | |
61 ngx_null_command | |
62 }; | |
63 | |
64 | |
667 | 65 static ngx_http_module_t ngx_http_auth_basic_module_ctx = { |
509 | 66 NULL, /* preconfiguration */ |
681 | 67 ngx_http_auth_basic_init, /* postconfiguration */ |
503 | 68 |
69 NULL, /* create main configuration */ | |
70 NULL, /* init main configuration */ | |
71 | |
72 NULL, /* create server configuration */ | |
73 NULL, /* merge server configuration */ | |
74 | |
75 ngx_http_auth_basic_create_loc_conf, /* create location configuration */ | |
76 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ | |
77 }; | |
78 | |
79 | |
80 ngx_module_t ngx_http_auth_basic_module = { | |
509 | 81 NGX_MODULE_V1, |
503 | 82 &ngx_http_auth_basic_module_ctx, /* module context */ |
83 ngx_http_auth_basic_commands, /* module directives */ | |
84 NGX_HTTP_MODULE, /* module type */ | |
541 | 85 NULL, /* init master */ |
681 | 86 NULL, /* init module */ |
541 | 87 NULL, /* init process */ |
88 NULL, /* init thread */ | |
89 NULL, /* exit thread */ | |
90 NULL, /* exit process */ | |
91 NULL, /* exit master */ | |
92 NGX_MODULE_V1_PADDING | |
503 | 93 }; |
94 | |
95 | |
96 static ngx_int_t | |
97 ngx_http_auth_basic_handler(ngx_http_request_t *r) | |
98 { | |
99 off_t offset; | |
100 ssize_t n; | |
101 ngx_fd_t fd; | |
539 | 102 ngx_int_t rc; |
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103 ngx_err_t err; |
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104 ngx_str_t pwd, user_file; |
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105 ngx_uint_t i, level, login, left, passwd; |
503 | 106 ngx_file_t file; |
107 ngx_http_auth_basic_ctx_t *ctx; | |
108 ngx_http_auth_basic_loc_conf_t *alcf; | |
109 u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; | |
110 enum { | |
111 sw_login, | |
112 sw_passwd, | |
113 sw_skip | |
114 } state; | |
115 | |
116 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); | |
117 | |
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118 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) { |
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119 return NGX_DECLINED; |
503 | 120 } |
121 | |
122 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); | |
123 | |
124 if (ctx) { | |
125 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, | |
126 &alcf->realm); | |
127 } | |
128 | |
539 | 129 rc = ngx_http_auth_basic_user(r); |
503 | 130 |
539 | 131 if (rc == NGX_DECLINED) { |
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132 |
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133 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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134 "no user/password was provided for basic authentication"); |
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135 |
503 | 136 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
137 } | |
138 | |
539 | 139 if (rc == NGX_ERROR) { |
503 | 140 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
141 } | |
142 | |
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143 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) { |
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144 return NGX_ERROR; |
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145 } |
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146 |
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147 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); |
503 | 148 |
149 if (fd == NGX_INVALID_FILE) { | |
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150 err = ngx_errno; |
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151 |
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152 if (err == NGX_ENOENT) { |
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153 level = NGX_LOG_ERR; |
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154 rc = NGX_HTTP_FORBIDDEN; |
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155 |
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156 } else { |
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157 level = NGX_LOG_CRIT; |
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158 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
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159 } |
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160 |
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161 ngx_log_error(level, r->connection->log, err, |
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162 ngx_open_file_n " \"%s\" failed", user_file.data); |
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163 |
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164 return rc; |
503 | 165 } |
166 | |
167 ngx_memzero(&file, sizeof(ngx_file_t)); | |
168 | |
169 file.fd = fd; | |
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170 file.name = user_file; |
503 | 171 file.log = r->connection->log; |
172 | |
173 state = sw_login; | |
174 passwd = 0; | |
175 login = 0; | |
176 left = 0; | |
177 offset = 0; | |
178 | |
179 for ( ;; ) { | |
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180 i = left; |
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181 |
503 | 182 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, |
183 offset); | |
184 | |
185 if (n == NGX_ERROR) { | |
186 ngx_http_auth_basic_close(&file); | |
187 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
188 } | |
189 | |
190 if (n == 0) { | |
191 break; | |
192 } | |
193 | |
194 for (i = left; i < left + n; i++) { | |
195 switch (state) { | |
196 | |
197 case sw_login: | |
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198 if (login == 0) { |
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199 |
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200 if (buf[i] == '#' || buf[i] == CR) { |
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201 state = sw_skip; |
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202 break; |
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203 } |
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204 |
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205 if (buf[i] == LF) { |
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206 break; |
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207 } |
503 | 208 } |
209 | |
539 | 210 if (buf[i] != r->headers_in.user.data[login]) { |
503 | 211 state = sw_skip; |
212 break; | |
213 } | |
214 | |
539 | 215 if (login == r->headers_in.user.len) { |
503 | 216 state = sw_passwd; |
217 passwd = i + 1; | |
218 } | |
219 | |
220 login++; | |
221 | |
222 break; | |
223 | |
224 case sw_passwd: | |
225 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { | |
226 buf[i] = '\0'; | |
227 | |
228 ngx_http_auth_basic_close(&file); | |
229 | |
230 pwd.len = i - passwd; | |
231 pwd.data = &buf[passwd]; | |
232 | |
233 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, | |
234 &alcf->realm); | |
235 } | |
236 | |
237 break; | |
238 | |
239 case sw_skip: | |
240 if (buf[i] == LF) { | |
241 state = sw_login; | |
242 login = 0; | |
243 } | |
244 | |
245 break; | |
246 } | |
247 } | |
248 | |
249 if (state == sw_passwd) { | |
250 left = left + n - passwd; | |
251 ngx_memcpy(buf, &buf[passwd], left); | |
252 passwd = 0; | |
253 | |
254 } else { | |
255 left = 0; | |
256 } | |
257 | |
258 offset += n; | |
259 } | |
260 | |
261 ngx_http_auth_basic_close(&file); | |
262 | |
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263 if (state == sw_passwd) { |
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264 pwd.len = i - passwd; |
2049 | 265 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); |
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266 if (pwd.data == NULL) { |
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267 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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268 } |
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269 |
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270 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1); |
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271 |
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272 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm); |
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273 } |
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274 |
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275 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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276 "user \"%V\" was not found in \"%V\"", |
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277 &r->headers_in.user, &user_file); |
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278 |
503 | 279 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
280 } | |
281 | |
282 | |
283 static ngx_int_t | |
284 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
285 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) | |
286 { | |
287 ngx_int_t rc; | |
288 u_char *encrypted; | |
289 | |
290 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, | |
291 &encrypted); | |
292 | |
293 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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294 "rc: %d user: \"%V\" salt: \"%s\"", |
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295 rc, &r->headers_in.user, passwd->data); |
503 | 296 |
297 if (rc == NGX_OK) { | |
298 if (ngx_strcmp(encrypted, passwd->data) == 0) { | |
299 return NGX_OK; | |
300 } | |
301 | |
302 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
303 "encrypted: \"%s\"", encrypted); | |
304 | |
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305 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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306 "user \"%V\": password mismatch", |
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307 &r->headers_in.user); |
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308 |
503 | 309 return ngx_http_auth_basic_set_realm(r, realm); |
310 } | |
311 | |
312 if (rc == NGX_ERROR) { | |
313 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
314 } | |
315 | |
316 /* rc == NGX_AGAIN */ | |
317 | |
318 if (ctx == NULL) { | |
319 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); | |
320 if (ctx == NULL) { | |
321 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
322 } | |
323 | |
324 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); | |
325 | |
326 ctx->passwd.len = passwd->len; | |
327 passwd->len++; | |
328 | |
329 ctx->passwd.data = ngx_pstrdup(r->pool, passwd); | |
330 if (ctx->passwd.data == NULL) { | |
331 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
332 } | |
333 | |
334 } | |
335 | |
336 /* TODO: add mutex event */ | |
337 | |
338 return rc; | |
339 } | |
340 | |
341 | |
342 static ngx_int_t | |
343 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) | |
344 { | |
345 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); | |
346 if (r->headers_out.www_authenticate == NULL) { | |
347 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
348 } | |
349 | |
509 | 350 r->headers_out.www_authenticate->hash = 1; |
503 | 351 r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1; |
352 r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate"; | |
353 r->headers_out.www_authenticate->value = *realm; | |
354 | |
355 return NGX_HTTP_UNAUTHORIZED; | |
356 } | |
357 | |
358 static void | |
359 ngx_http_auth_basic_close(ngx_file_t *file) | |
360 { | |
361 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
362 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno, | |
363 ngx_close_file_n " \"%s\" failed", file->name.data); | |
364 } | |
365 } | |
366 | |
367 | |
368 static void * | |
369 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) | |
370 { | |
371 ngx_http_auth_basic_loc_conf_t *conf; | |
372 | |
373 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t)); | |
374 if (conf == NULL) { | |
375 return NGX_CONF_ERROR; | |
376 } | |
377 | |
378 return conf; | |
379 } | |
380 | |
381 | |
382 static char * | |
383 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
384 { | |
385 ngx_http_auth_basic_loc_conf_t *prev = parent; | |
386 ngx_http_auth_basic_loc_conf_t *conf = child; | |
387 | |
581 | 388 if (conf->realm.data == NULL) { |
503 | 389 conf->realm = prev->realm; |
390 } | |
391 | |
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392 if (conf->user_file.value.len == 0) { |
503 | 393 conf->user_file = prev->user_file; |
394 } | |
395 | |
396 return NGX_CONF_OK; | |
397 } | |
398 | |
399 | |
400 static ngx_int_t | |
681 | 401 ngx_http_auth_basic_init(ngx_conf_t *cf) |
503 | 402 { |
403 ngx_http_handler_pt *h; | |
404 ngx_http_core_main_conf_t *cmcf; | |
405 | |
681 | 406 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
503 | 407 |
408 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); | |
409 if (h == NULL) { | |
410 return NGX_ERROR; | |
411 } | |
412 | |
413 *h = ngx_http_auth_basic_handler; | |
414 | |
415 return NGX_OK; | |
416 } | |
417 | |
418 | |
419 static char * | |
420 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data) | |
421 { | |
422 ngx_str_t *realm = data; | |
423 | |
581 | 424 size_t len; |
425 u_char *basic, *p; | |
426 | |
503 | 427 if (ngx_strcmp(realm->data, "off") == 0) { |
428 realm->len = 0; | |
429 realm->data = (u_char *) ""; | |
583 | 430 |
431 return NGX_CONF_OK; | |
503 | 432 } |
433 | |
581 | 434 len = sizeof("Basic realm=\"") - 1 + realm->len + 1; |
435 | |
2049 | 436 basic = ngx_pnalloc(cf->pool, len); |
581 | 437 if (basic == NULL) { |
438 return NGX_CONF_ERROR; | |
439 } | |
440 | |
441 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); | |
442 p = ngx_cpymem(p, realm->data, realm->len); | |
443 *p = '"'; | |
444 | |
445 realm->len = len; | |
446 realm->data = basic; | |
447 | |
503 | 448 return NGX_CONF_OK; |
449 } | |
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450 |
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451 |
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452 static char * |
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453 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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454 { |
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455 ngx_http_auth_basic_loc_conf_t *alcf = conf; |
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456 |
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457 ngx_str_t *value; |
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458 ngx_http_compile_complex_value_t ccv; |
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459 |
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460 if (alcf->user_file.value.len) { |
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461 return "is duplicate"; |
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462 } |
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463 |
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464 value = cf->args->elts; |
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465 |
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466 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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467 |
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468 ccv.cf = cf; |
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469 ccv.value = &value[1]; |
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470 ccv.complex_value = &alcf->user_file; |
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471 ccv.zero = 1; |
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472 ccv.conf_prefix = 1; |
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473 |
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474 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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475 return NGX_CONF_ERROR; |
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476 } |
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477 |
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478 return NGX_CONF_OK; |
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479 } |