Mercurial > hg > nginx
annotate src/http/modules/ngx_http_auth_basic_module.c @ 4051:23166b41f9b3 stable-1.0 release-1.0.6
nginx-1.0.6-RELEASE
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 29 Aug 2011 14:28:23 +0000 |
parents | 9c057d5e1c27 |
children | d620f497c50f |
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> | |
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10 #include <ngx_crypt.h> |
503 | 11 |
12 | |
13 #define NGX_HTTP_AUTH_BUF_SIZE 2048 | |
14 | |
15 | |
16 typedef struct { | |
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17 ngx_str_t passwd; |
503 | 18 } ngx_http_auth_basic_ctx_t; |
19 | |
20 | |
21 typedef struct { | |
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22 ngx_str_t realm; |
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23 ngx_http_complex_value_t user_file; |
503 | 24 } ngx_http_auth_basic_loc_conf_t; |
25 | |
26 | |
27 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); | |
28 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
29 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); | |
30 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, | |
31 ngx_str_t *realm); | |
32 static void ngx_http_auth_basic_close(ngx_file_t *file); | |
33 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); | |
34 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, | |
35 void *parent, void *child); | |
681 | 36 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); |
503 | 37 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); |
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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); |
503 | 40 |
41 | |
42 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; | |
43 | |
44 static ngx_command_t ngx_http_auth_basic_commands[] = { | |
45 | |
46 { ngx_string("auth_basic"), | |
631 | 47 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
48 |NGX_CONF_TAKE1, | |
503 | 49 ngx_conf_set_str_slot, |
50 NGX_HTTP_LOC_CONF_OFFSET, | |
51 offsetof(ngx_http_auth_basic_loc_conf_t, realm), | |
52 &ngx_http_auth_basic_p }, | |
53 | |
54 { ngx_string("auth_basic_user_file"), | |
631 | 55 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
56 |NGX_CONF_TAKE1, | |
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57 ngx_http_auth_basic_user_file, |
503 | 58 NGX_HTTP_LOC_CONF_OFFSET, |
59 offsetof(ngx_http_auth_basic_loc_conf_t, user_file), | |
60 NULL }, | |
61 | |
62 ngx_null_command | |
63 }; | |
64 | |
65 | |
667 | 66 static ngx_http_module_t ngx_http_auth_basic_module_ctx = { |
509 | 67 NULL, /* preconfiguration */ |
681 | 68 ngx_http_auth_basic_init, /* postconfiguration */ |
503 | 69 |
70 NULL, /* create main configuration */ | |
71 NULL, /* init main configuration */ | |
72 | |
73 NULL, /* create server configuration */ | |
74 NULL, /* merge server configuration */ | |
75 | |
76 ngx_http_auth_basic_create_loc_conf, /* create location configuration */ | |
77 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ | |
78 }; | |
79 | |
80 | |
81 ngx_module_t ngx_http_auth_basic_module = { | |
509 | 82 NGX_MODULE_V1, |
503 | 83 &ngx_http_auth_basic_module_ctx, /* module context */ |
84 ngx_http_auth_basic_commands, /* module directives */ | |
85 NGX_HTTP_MODULE, /* module type */ | |
541 | 86 NULL, /* init master */ |
681 | 87 NULL, /* init module */ |
541 | 88 NULL, /* init process */ |
89 NULL, /* init thread */ | |
90 NULL, /* exit thread */ | |
91 NULL, /* exit process */ | |
92 NULL, /* exit master */ | |
93 NGX_MODULE_V1_PADDING | |
503 | 94 }; |
95 | |
96 | |
97 static ngx_int_t | |
98 ngx_http_auth_basic_handler(ngx_http_request_t *r) | |
99 { | |
100 off_t offset; | |
101 ssize_t n; | |
102 ngx_fd_t fd; | |
539 | 103 ngx_int_t rc; |
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104 ngx_err_t err; |
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105 ngx_str_t pwd, user_file; |
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106 ngx_uint_t i, level, login, left, passwd; |
503 | 107 ngx_file_t file; |
108 ngx_http_auth_basic_ctx_t *ctx; | |
109 ngx_http_auth_basic_loc_conf_t *alcf; | |
110 u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; | |
111 enum { | |
112 sw_login, | |
113 sw_passwd, | |
114 sw_skip | |
115 } state; | |
116 | |
117 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); | |
118 | |
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119 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) { |
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120 return NGX_DECLINED; |
503 | 121 } |
122 | |
123 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); | |
124 | |
125 if (ctx) { | |
126 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, | |
127 &alcf->realm); | |
128 } | |
129 | |
539 | 130 rc = ngx_http_auth_basic_user(r); |
503 | 131 |
539 | 132 if (rc == NGX_DECLINED) { |
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133 |
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134 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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135 "no user/password was provided for basic authentication"); |
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136 |
503 | 137 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
138 } | |
139 | |
539 | 140 if (rc == NGX_ERROR) { |
503 | 141 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
142 } | |
143 | |
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144 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) { |
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145 return NGX_ERROR; |
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146 } |
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147 |
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148 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); |
503 | 149 |
150 if (fd == NGX_INVALID_FILE) { | |
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151 err = ngx_errno; |
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152 |
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153 if (err == NGX_ENOENT) { |
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154 level = NGX_LOG_ERR; |
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155 rc = NGX_HTTP_FORBIDDEN; |
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156 |
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157 } else { |
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158 level = NGX_LOG_CRIT; |
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159 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
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160 } |
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161 |
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162 ngx_log_error(level, r->connection->log, err, |
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163 ngx_open_file_n " \"%s\" failed", user_file.data); |
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164 |
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165 return rc; |
503 | 166 } |
167 | |
168 ngx_memzero(&file, sizeof(ngx_file_t)); | |
169 | |
170 file.fd = fd; | |
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171 file.name = user_file; |
503 | 172 file.log = r->connection->log; |
173 | |
174 state = sw_login; | |
175 passwd = 0; | |
176 login = 0; | |
177 left = 0; | |
178 offset = 0; | |
179 | |
180 for ( ;; ) { | |
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181 i = left; |
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182 |
503 | 183 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, |
184 offset); | |
185 | |
186 if (n == NGX_ERROR) { | |
187 ngx_http_auth_basic_close(&file); | |
188 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
189 } | |
190 | |
191 if (n == 0) { | |
192 break; | |
193 } | |
194 | |
195 for (i = left; i < left + n; i++) { | |
196 switch (state) { | |
197 | |
198 case sw_login: | |
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199 if (login == 0) { |
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200 |
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201 if (buf[i] == '#' || buf[i] == CR) { |
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202 state = sw_skip; |
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203 break; |
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204 } |
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205 |
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206 if (buf[i] == LF) { |
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207 break; |
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208 } |
503 | 209 } |
210 | |
539 | 211 if (buf[i] != r->headers_in.user.data[login]) { |
503 | 212 state = sw_skip; |
213 break; | |
214 } | |
215 | |
539 | 216 if (login == r->headers_in.user.len) { |
503 | 217 state = sw_passwd; |
218 passwd = i + 1; | |
219 } | |
220 | |
221 login++; | |
222 | |
223 break; | |
224 | |
225 case sw_passwd: | |
226 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { | |
227 buf[i] = '\0'; | |
228 | |
229 ngx_http_auth_basic_close(&file); | |
230 | |
231 pwd.len = i - passwd; | |
232 pwd.data = &buf[passwd]; | |
233 | |
234 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, | |
235 &alcf->realm); | |
236 } | |
237 | |
238 break; | |
239 | |
240 case sw_skip: | |
241 if (buf[i] == LF) { | |
242 state = sw_login; | |
243 login = 0; | |
244 } | |
245 | |
246 break; | |
247 } | |
248 } | |
249 | |
250 if (state == sw_passwd) { | |
251 left = left + n - passwd; | |
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252 ngx_memmove(buf, &buf[passwd], left); |
503 | 253 passwd = 0; |
254 | |
255 } else { | |
256 left = 0; | |
257 } | |
258 | |
259 offset += n; | |
260 } | |
261 | |
262 ngx_http_auth_basic_close(&file); | |
263 | |
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264 if (state == sw_passwd) { |
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265 pwd.len = i - passwd; |
2049 | 266 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); |
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267 if (pwd.data == NULL) { |
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268 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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269 } |
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270 |
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271 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1); |
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272 |
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273 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm); |
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274 } |
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275 |
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276 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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277 "user \"%V\" was not found in \"%V\"", |
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278 &r->headers_in.user, &user_file); |
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279 |
503 | 280 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
281 } | |
282 | |
283 | |
284 static ngx_int_t | |
285 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
286 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) | |
287 { | |
288 ngx_int_t rc; | |
289 u_char *encrypted; | |
290 | |
291 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, | |
292 &encrypted); | |
293 | |
294 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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295 "rc: %d user: \"%V\" salt: \"%s\"", |
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296 rc, &r->headers_in.user, passwd->data); |
503 | 297 |
298 if (rc == NGX_OK) { | |
299 if (ngx_strcmp(encrypted, passwd->data) == 0) { | |
300 return NGX_OK; | |
301 } | |
302 | |
303 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
304 "encrypted: \"%s\"", encrypted); | |
305 | |
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306 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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307 "user \"%V\": password mismatch", |
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308 &r->headers_in.user); |
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309 |
503 | 310 return ngx_http_auth_basic_set_realm(r, realm); |
311 } | |
312 | |
313 if (rc == NGX_ERROR) { | |
314 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
315 } | |
316 | |
317 /* rc == NGX_AGAIN */ | |
318 | |
319 if (ctx == NULL) { | |
320 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); | |
321 if (ctx == NULL) { | |
322 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
323 } | |
324 | |
325 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); | |
326 | |
327 ctx->passwd.len = passwd->len; | |
328 passwd->len++; | |
329 | |
330 ctx->passwd.data = ngx_pstrdup(r->pool, passwd); | |
331 if (ctx->passwd.data == NULL) { | |
332 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
333 } | |
334 | |
335 } | |
336 | |
337 /* TODO: add mutex event */ | |
338 | |
339 return rc; | |
340 } | |
341 | |
342 | |
343 static ngx_int_t | |
344 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) | |
345 { | |
346 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); | |
347 if (r->headers_out.www_authenticate == NULL) { | |
348 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
349 } | |
350 | |
509 | 351 r->headers_out.www_authenticate->hash = 1; |
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352 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate"); |
503 | 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) { | |
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375 return NULL; |
503 | 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) { |
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428 ngx_str_set(realm, ""); |
583 | 429 return NGX_CONF_OK; |
503 | 430 } |
431 | |
581 | 432 len = sizeof("Basic realm=\"") - 1 + realm->len + 1; |
433 | |
2049 | 434 basic = ngx_pnalloc(cf->pool, len); |
581 | 435 if (basic == NULL) { |
436 return NGX_CONF_ERROR; | |
437 } | |
438 | |
439 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); | |
440 p = ngx_cpymem(p, realm->data, realm->len); | |
441 *p = '"'; | |
442 | |
443 realm->len = len; | |
444 realm->data = basic; | |
445 | |
503 | 446 return NGX_CONF_OK; |
447 } | |
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448 |
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449 |
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450 static char * |
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451 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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452 { |
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453 ngx_http_auth_basic_loc_conf_t *alcf = conf; |
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454 |
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455 ngx_str_t *value; |
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456 ngx_http_compile_complex_value_t ccv; |
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457 |
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458 if (alcf->user_file.value.len) { |
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459 return "is duplicate"; |
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460 } |
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461 |
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462 value = cf->args->elts; |
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463 |
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464 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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465 |
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466 ccv.cf = cf; |
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467 ccv.value = &value[1]; |
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468 ccv.complex_value = &alcf->user_file; |
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469 ccv.zero = 1; |
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470 ccv.conf_prefix = 1; |
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471 |
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472 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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473 return NGX_CONF_ERROR; |
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474 } |
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475 |
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476 return NGX_CONF_OK; |
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477 } |