|
5329
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Maxim Dounin
|
|
|
4 * Copyright (C) Nginx, Inc.
|
|
|
5 */
|
|
|
6
|
|
|
7
|
|
|
8 #include <ngx_config.h>
|
|
|
9 #include <ngx_core.h>
|
|
|
10 #include <ngx_http.h>
|
|
|
11
|
|
|
12
|
|
|
13 typedef struct {
|
|
|
14 ngx_str_t uri;
|
|
|
15 ngx_array_t *vars;
|
|
|
16 } ngx_http_auth_request_conf_t;
|
|
|
17
|
|
|
18
|
|
|
19 typedef struct {
|
|
|
20 ngx_uint_t done;
|
|
|
21 ngx_uint_t status;
|
|
|
22 ngx_http_request_t *subrequest;
|
|
|
23 } ngx_http_auth_request_ctx_t;
|
|
|
24
|
|
|
25
|
|
|
26 typedef struct {
|
|
|
27 ngx_int_t index;
|
|
|
28 ngx_http_complex_value_t value;
|
|
|
29 ngx_http_set_variable_pt set_handler;
|
|
|
30 } ngx_http_auth_request_variable_t;
|
|
|
31
|
|
|
32
|
|
|
33 static ngx_int_t ngx_http_auth_request_handler(ngx_http_request_t *r);
|
|
|
34 static ngx_int_t ngx_http_auth_request_done(ngx_http_request_t *r,
|
|
|
35 void *data, ngx_int_t rc);
|
|
|
36 static ngx_int_t ngx_http_auth_request_set_variables(ngx_http_request_t *r,
|
|
|
37 ngx_http_auth_request_conf_t *arcf, ngx_http_auth_request_ctx_t *ctx);
|
|
|
38 static ngx_int_t ngx_http_auth_request_variable(ngx_http_request_t *r,
|
|
|
39 ngx_http_variable_value_t *v, uintptr_t data);
|
|
|
40 static void *ngx_http_auth_request_create_conf(ngx_conf_t *cf);
|
|
|
41 static char *ngx_http_auth_request_merge_conf(ngx_conf_t *cf,
|
|
|
42 void *parent, void *child);
|
|
|
43 static ngx_int_t ngx_http_auth_request_init(ngx_conf_t *cf);
|
|
|
44 static char *ngx_http_auth_request(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
45 void *conf);
|
|
|
46 static char *ngx_http_auth_request_set(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
47 void *conf);
|
|
|
48
|
|
|
49
|
|
|
50 static ngx_command_t ngx_http_auth_request_commands[] = {
|
|
|
51
|
|
|
52 { ngx_string("auth_request"),
|
|
|
53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
54 ngx_http_auth_request,
|
|
|
55 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
56 0,
|
|
|
57 NULL },
|
|
|
58
|
|
|
59 { ngx_string("auth_request_set"),
|
|
|
60 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
|
|
|
61 ngx_http_auth_request_set,
|
|
|
62 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
63 0,
|
|
|
64 NULL },
|
|
|
65
|
|
|
66 ngx_null_command
|
|
|
67 };
|
|
|
68
|
|
|
69
|
|
|
70 static ngx_http_module_t ngx_http_auth_request_module_ctx = {
|
|
|
71 NULL, /* preconfiguration */
|
|
|
72 ngx_http_auth_request_init, /* postconfiguration */
|
|
|
73
|
|
|
74 NULL, /* create main configuration */
|
|
|
75 NULL, /* init main configuration */
|
|
|
76
|
|
|
77 NULL, /* create server configuration */
|
|
|
78 NULL, /* merge server configuration */
|
|
|
79
|
|
|
80 ngx_http_auth_request_create_conf, /* create location configuration */
|
|
|
81 ngx_http_auth_request_merge_conf /* merge location configuration */
|
|
|
82 };
|
|
|
83
|
|
|
84
|
|
|
85 ngx_module_t ngx_http_auth_request_module = {
|
|
|
86 NGX_MODULE_V1,
|
|
|
87 &ngx_http_auth_request_module_ctx, /* module context */
|
|
|
88 ngx_http_auth_request_commands, /* module directives */
|
|
|
89 NGX_HTTP_MODULE, /* module type */
|
|
|
90 NULL, /* init master */
|
|
|
91 NULL, /* init module */
|
|
|
92 NULL, /* init process */
|
|
|
93 NULL, /* init thread */
|
|
|
94 NULL, /* exit thread */
|
|
|
95 NULL, /* exit process */
|
|
|
96 NULL, /* exit master */
|
|
|
97 NGX_MODULE_V1_PADDING
|
|
|
98 };
|
|
|
99
|
|
|
100
|
|
|
101 static ngx_int_t
|
|
|
102 ngx_http_auth_request_handler(ngx_http_request_t *r)
|
|
|
103 {
|
|
|
104 ngx_table_elt_t *h, *ho;
|
|
|
105 ngx_http_request_t *sr;
|
|
|
106 ngx_http_post_subrequest_t *ps;
|
|
|
107 ngx_http_auth_request_ctx_t *ctx;
|
|
|
108 ngx_http_auth_request_conf_t *arcf;
|
|
|
109
|
|
|
110 arcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_request_module);
|
|
|
111
|
|
|
112 if (arcf->uri.len == 0) {
|
|
|
113 return NGX_DECLINED;
|
|
|
114 }
|
|
|
115
|
|
|
116 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
117 "auth request handler");
|
|
|
118
|
|
|
119 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_request_module);
|
|
|
120
|
|
|
121 if (ctx != NULL) {
|
|
|
122 if (!ctx->done) {
|
|
|
123 return NGX_AGAIN;
|
|
|
124 }
|
|
|
125
|
|
|
126 /*
|
|
|
127 * as soon as we are done - explicitly set variables to make
|
|
|
128 * sure they will be available after internal redirects
|
|
|
129 */
|
|
|
130
|
|
|
131 if (ngx_http_auth_request_set_variables(r, arcf, ctx) != NGX_OK) {
|
|
|
132 return NGX_ERROR;
|
|
|
133 }
|
|
|
134
|
|
|
135 /* return appropriate status */
|
|
|
136
|
|
|
137 if (ctx->status == NGX_HTTP_FORBIDDEN) {
|
|
|
138 return ctx->status;
|
|
|
139 }
|
|
|
140
|
|
|
141 if (ctx->status == NGX_HTTP_UNAUTHORIZED) {
|
|
|
142 sr = ctx->subrequest;
|
|
|
143
|
|
|
144 h = sr->headers_out.www_authenticate;
|
|
|
145
|
|
|
146 if (!h && sr->upstream) {
|
|
|
147 h = sr->upstream->headers_in.www_authenticate;
|
|
|
148 }
|
|
|
149
|
|
|
150 if (h) {
|
|
|
151 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
152 if (ho == NULL) {
|
|
|
153 return NGX_ERROR;
|
|
|
154 }
|
|
|
155
|
|
|
156 *ho = *h;
|
|
|
157
|
|
|
158 r->headers_out.www_authenticate = ho;
|
|
|
159 }
|
|
|
160
|
|
|
161 return ctx->status;
|
|
|
162 }
|
|
|
163
|
|
|
164 if (ctx->status >= NGX_HTTP_OK
|
|
|
165 && ctx->status < NGX_HTTP_SPECIAL_RESPONSE)
|
|
|
166 {
|
|
|
167 return NGX_OK;
|
|
|
168 }
|
|
|
169
|
|
|
170 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
6480
|
171 "auth request unexpected status: %ui", ctx->status);
|
|
5329
|
172
|
|
|
173 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
174 }
|
|
|
175
|
|
|
176 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_auth_request_ctx_t));
|
|
|
177 if (ctx == NULL) {
|
|
|
178 return NGX_ERROR;
|
|
|
179 }
|
|
|
180
|
|
|
181 ps = ngx_palloc(r->pool, sizeof(ngx_http_post_subrequest_t));
|
|
|
182 if (ps == NULL) {
|
|
|
183 return NGX_ERROR;
|
|
|
184 }
|
|
|
185
|
|
|
186 ps->handler = ngx_http_auth_request_done;
|
|
|
187 ps->data = ctx;
|
|
|
188
|
|
|
189 if (ngx_http_subrequest(r, &arcf->uri, NULL, &sr, ps,
|
|
|
190 NGX_HTTP_SUBREQUEST_WAITED)
|
|
|
191 != NGX_OK)
|
|
|
192 {
|
|
|
193 return NGX_ERROR;
|
|
|
194 }
|
|
|
195
|
|
|
196 /*
|
|
|
197 * allocate fake request body to avoid attempts to read it and to make
|
|
|
198 * sure real body file (if already read) won't be closed by upstream
|
|
|
199 */
|
|
|
200
|
|
|
201 sr->request_body = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
|
|
|
202 if (sr->request_body == NULL) {
|
|
|
203 return NGX_ERROR;
|
|
|
204 }
|
|
|
205
|
|
|
206 sr->header_only = 1;
|
|
|
207
|
|
|
208 ctx->subrequest = sr;
|
|
|
209
|
|
|
210 ngx_http_set_ctx(r, ctx, ngx_http_auth_request_module);
|
|
|
211
|
|
|
212 return NGX_AGAIN;
|
|
|
213 }
|
|
|
214
|
|
|
215
|
|
|
216 static ngx_int_t
|
|
|
217 ngx_http_auth_request_done(ngx_http_request_t *r, void *data, ngx_int_t rc)
|
|
|
218 {
|
|
|
219 ngx_http_auth_request_ctx_t *ctx = data;
|
|
|
220
|
|
|
221 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
6480
|
222 "auth request done s:%ui", r->headers_out.status);
|
|
5329
|
223
|
|
|
224 ctx->done = 1;
|
|
|
225 ctx->status = r->headers_out.status;
|
|
|
226
|
|
|
227 return rc;
|
|
|
228 }
|
|
|
229
|
|
|
230
|
|
|
231 static ngx_int_t
|
|
|
232 ngx_http_auth_request_set_variables(ngx_http_request_t *r,
|
|
|
233 ngx_http_auth_request_conf_t *arcf, ngx_http_auth_request_ctx_t *ctx)
|
|
|
234 {
|
|
|
235 ngx_str_t val;
|
|
|
236 ngx_http_variable_t *v;
|
|
|
237 ngx_http_variable_value_t *vv;
|
|
|
238 ngx_http_auth_request_variable_t *av, *last;
|
|
|
239 ngx_http_core_main_conf_t *cmcf;
|
|
|
240
|
|
|
241 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
242 "auth request set variables");
|
|
|
243
|
|
|
244 if (arcf->vars == NULL) {
|
|
|
245 return NGX_OK;
|
|
|
246 }
|
|
|
247
|
|
|
248 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
|
|
|
249 v = cmcf->variables.elts;
|
|
|
250
|
|
|
251 av = arcf->vars->elts;
|
|
|
252 last = av + arcf->vars->nelts;
|
|
|
253
|
|
|
254 while (av < last) {
|
|
|
255 /*
|
|
|
256 * explicitly set new value to make sure it will be available after
|
|
|
257 * internal redirects
|
|
|
258 */
|
|
|
259
|
|
|
260 vv = &r->variables[av->index];
|
|
|
261
|
|
|
262 if (ngx_http_complex_value(ctx->subrequest, &av->value, &val)
|
|
|
263 != NGX_OK)
|
|
|
264 {
|
|
|
265 return NGX_ERROR;
|
|
|
266 }
|
|
|
267
|
|
|
268 vv->valid = 1;
|
|
|
269 vv->not_found = 0;
|
|
|
270 vv->data = val.data;
|
|
|
271 vv->len = val.len;
|
|
|
272
|
|
|
273 if (av->set_handler) {
|
|
|
274 /*
|
|
|
275 * set_handler only available in cmcf->variables_keys, so we store
|
|
|
276 * it explicitly
|
|
|
277 */
|
|
|
278
|
|
|
279 av->set_handler(r, vv, v[av->index].data);
|
|
|
280 }
|
|
|
281
|
|
|
282 av++;
|
|
|
283 }
|
|
|
284
|
|
|
285 return NGX_OK;
|
|
|
286 }
|
|
|
287
|
|
|
288
|
|
|
289 static ngx_int_t
|
|
|
290 ngx_http_auth_request_variable(ngx_http_request_t *r,
|
|
|
291 ngx_http_variable_value_t *v, uintptr_t data)
|
|
|
292 {
|
|
|
293 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
294 "auth request variable");
|
|
|
295
|
|
|
296 v->not_found = 1;
|
|
|
297
|
|
|
298 return NGX_OK;
|
|
|
299 }
|
|
|
300
|
|
|
301
|
|
|
302 static void *
|
|
|
303 ngx_http_auth_request_create_conf(ngx_conf_t *cf)
|
|
|
304 {
|
|
|
305 ngx_http_auth_request_conf_t *conf;
|
|
|
306
|
|
|
307 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_request_conf_t));
|
|
|
308 if (conf == NULL) {
|
|
|
309 return NULL;
|
|
|
310 }
|
|
|
311
|
|
|
312 /*
|
|
|
313 * set by ngx_pcalloc():
|
|
|
314 *
|
|
|
315 * conf->uri = { 0, NULL };
|
|
|
316 */
|
|
|
317
|
|
|
318 conf->vars = NGX_CONF_UNSET_PTR;
|
|
|
319
|
|
|
320 return conf;
|
|
|
321 }
|
|
|
322
|
|
|
323
|
|
|
324 static char *
|
|
|
325 ngx_http_auth_request_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
326 {
|
|
|
327 ngx_http_auth_request_conf_t *prev = parent;
|
|
|
328 ngx_http_auth_request_conf_t *conf = child;
|
|
|
329
|
|
|
330 ngx_conf_merge_str_value(conf->uri, prev->uri, "");
|
|
|
331 ngx_conf_merge_ptr_value(conf->vars, prev->vars, NULL);
|
|
|
332
|
|
|
333 return NGX_CONF_OK;
|
|
|
334 }
|
|
|
335
|
|
|
336
|
|
|
337 static ngx_int_t
|
|
|
338 ngx_http_auth_request_init(ngx_conf_t *cf)
|
|
|
339 {
|
|
|
340 ngx_http_handler_pt *h;
|
|
|
341 ngx_http_core_main_conf_t *cmcf;
|
|
|
342
|
|
|
343 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
|
344
|
|
|
345 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
|
|
|
346 if (h == NULL) {
|
|
|
347 return NGX_ERROR;
|
|
|
348 }
|
|
|
349
|
|
|
350 *h = ngx_http_auth_request_handler;
|
|
|
351
|
|
|
352 return NGX_OK;
|
|
|
353 }
|
|
|
354
|
|
|
355
|
|
|
356 static char *
|
|
|
357 ngx_http_auth_request(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
358 {
|
|
|
359 ngx_http_auth_request_conf_t *arcf = conf;
|
|
|
360
|
|
|
361 ngx_str_t *value;
|
|
|
362
|
|
|
363 if (arcf->uri.data != NULL) {
|
|
|
364 return "is duplicate";
|
|
|
365 }
|
|
|
366
|
|
|
367 value = cf->args->elts;
|
|
|
368
|
|
|
369 if (ngx_strcmp(value[1].data, "off") == 0) {
|
|
|
370 arcf->uri.len = 0;
|
|
|
371 arcf->uri.data = (u_char *) "";
|
|
|
372
|
|
|
373 return NGX_CONF_OK;
|
|
|
374 }
|
|
|
375
|
|
|
376 arcf->uri = value[1];
|
|
|
377
|
|
|
378 return NGX_CONF_OK;
|
|
|
379 }
|
|
|
380
|
|
|
381
|
|
|
382 static char *
|
|
|
383 ngx_http_auth_request_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
384 {
|
|
|
385 ngx_http_auth_request_conf_t *arcf = conf;
|
|
|
386
|
|
|
387 ngx_str_t *value;
|
|
|
388 ngx_http_variable_t *v;
|
|
|
389 ngx_http_auth_request_variable_t *av;
|
|
|
390 ngx_http_compile_complex_value_t ccv;
|
|
|
391
|
|
|
392 value = cf->args->elts;
|
|
|
393
|
|
|
394 if (value[1].data[0] != '$') {
|
|
|
395 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
396 "invalid variable name \"%V\"", &value[1]);
|
|
|
397 return NGX_CONF_ERROR;
|
|
|
398 }
|
|
|
399
|
|
|
400 value[1].len--;
|
|
|
401 value[1].data++;
|
|
|
402
|
|
|
403 if (arcf->vars == NGX_CONF_UNSET_PTR) {
|
|
|
404 arcf->vars = ngx_array_create(cf->pool, 1,
|
|
|
405 sizeof(ngx_http_auth_request_variable_t));
|
|
|
406 if (arcf->vars == NULL) {
|
|
|
407 return NGX_CONF_ERROR;
|
|
|
408 }
|
|
|
409 }
|
|
|
410
|
|
|
411 av = ngx_array_push(arcf->vars);
|
|
|
412 if (av == NULL) {
|
|
|
413 return NGX_CONF_ERROR;
|
|
|
414 }
|
|
|
415
|
|
|
416 v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGEABLE);
|
|
|
417 if (v == NULL) {
|
|
|
418 return NGX_CONF_ERROR;
|
|
|
419 }
|
|
|
420
|
|
|
421 av->index = ngx_http_get_variable_index(cf, &value[1]);
|
|
|
422 if (av->index == NGX_ERROR) {
|
|
|
423 return NGX_CONF_ERROR;
|
|
|
424 }
|
|
|
425
|
|
|
426 if (v->get_handler == NULL) {
|
|
|
427 v->get_handler = ngx_http_auth_request_variable;
|
|
|
428 v->data = (uintptr_t) av;
|
|
|
429 }
|
|
|
430
|
|
|
431 av->set_handler = v->set_handler;
|
|
|
432
|
|
|
433 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
434
|
|
|
435 ccv.cf = cf;
|
|
|
436 ccv.value = &value[2];
|
|
|
437 ccv.complex_value = &av->value;
|
|
|
438
|
|
|
439 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
440 return NGX_CONF_ERROR;
|
|
|
441 }
|
|
|
442
|
|
|
443 return NGX_CONF_OK;
|
|
|
444 }
|
