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29f178bd | 1 | /* |
fecb3aae | 2 | * Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved. |
29f178bd DDO |
3 | * Copyright Siemens AG 2018-2020 |
4 | * | |
5 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
9 | */ | |
10 | ||
d5f9166b | 11 | #include "internal/e_os.h" |
29f178bd DDO |
12 | #include <stdio.h> |
13 | #include <stdlib.h> | |
14 | #include "crypto/ctype.h" | |
15 | #include <string.h> | |
16 | #include <openssl/asn1.h> | |
17 | #include <openssl/evp.h> | |
18 | #include <openssl/err.h> | |
19 | #include <openssl/httperr.h> | |
20 | #include <openssl/cmperr.h> | |
21 | #include <openssl/buffer.h> | |
22 | #include <openssl/http.h> | |
e8fdb060 | 23 | #include <openssl/trace.h> |
29f178bd | 24 | #include "internal/sockets.h" |
af16097f | 25 | #include "internal/common.h" /* for ossl_assert() */ |
29f178bd | 26 | |
29f178bd DDO |
27 | #define HTTP_PREFIX "HTTP/" |
28 | #define HTTP_VERSION_PATT "1." /* allow 1.x */ | |
47bb597b | 29 | #define HTTP_VERSION_STR_LEN sizeof(HTTP_VERSION_PATT) /* == strlen("1.0") */ |
19f97fe6 DDO |
30 | #define HTTP_PREFIX_VERSION HTTP_PREFIX""HTTP_VERSION_PATT |
31 | #define HTTP_1_0 HTTP_PREFIX_VERSION"0" /* "HTTP/1.0" */ | |
765860a3 | 32 | #define HTTP_LINE1_MINLEN (sizeof(HTTP_PREFIX_VERSION "x 200\n") - 1) |
29f178bd DDO |
33 | #define HTTP_VERSION_MAX_REDIRECTIONS 50 |
34 | ||
35 | #define HTTP_STATUS_CODE_OK 200 | |
36 | #define HTTP_STATUS_CODE_MOVED_PERMANENTLY 301 | |
37 | #define HTTP_STATUS_CODE_FOUND 302 | |
38 | ||
29f178bd DDO |
39 | /* Stateful HTTP request code, supporting blocking and non-blocking I/O */ |
40 | ||
41 | /* Opaque HTTP request status structure */ | |
42 | ||
43 | struct ossl_http_req_ctx_st { | |
44 | int state; /* Current I/O state */ | |
e2c38c1a DDO |
45 | unsigned char *buf; /* Buffer to write request or read response */ |
46 | int buf_size; /* Buffer size */ | |
19f97fe6 DDO |
47 | int free_wbio; /* wbio allocated internally, free with ctx */ |
48 | BIO *wbio; /* BIO to write/send request to */ | |
49 | BIO *rbio; /* BIO to read/receive response from */ | |
50 | OSSL_HTTP_bio_cb_t upd_fn; /* Optional BIO update callback used for TLS */ | |
51 | void *upd_arg; /* Optional arg for update callback function */ | |
52 | int use_ssl; /* Use HTTPS */ | |
53 | char *proxy; /* Optional proxy name or URI */ | |
54 | char *server; /* Optional server host name */ | |
55 | char *port; /* Optional server port */ | |
8b5ca511 DDO |
56 | BIO *mem; /* Memory BIO holding request/response header */ |
57 | BIO *req; /* BIO holding the request provided by caller */ | |
19f97fe6 DDO |
58 | int method_POST; /* HTTP method is POST (else GET) */ |
59 | char *expected_ct; /* Optional expected Content-Type */ | |
60 | int expect_asn1; /* Response must be ASN.1-encoded */ | |
8b5ca511 DDO |
61 | unsigned char *pos; /* Current position sending data */ |
62 | long len_to_send; /* Number of bytes still to send */ | |
be799eb7 DDO |
63 | size_t resp_len; /* Length of response */ |
64 | size_t max_resp_len; /* Maximum length of response, or 0 */ | |
8f965908 DDO |
65 | int keep_alive; /* Persistent conn. 0=no, 1=prefer, 2=require */ |
66 | time_t max_time; /* Maximum end time of current transfer, or 0 */ | |
67 | time_t max_total_time; /* Maximum end time of total transfer, or 0 */ | |
19f97fe6 | 68 | char *redirection_url; /* Location obtained from HTTP status 301/302 */ |
29f178bd DDO |
69 | }; |
70 | ||
29f178bd DDO |
71 | /* HTTP states */ |
72 | ||
be799eb7 DDO |
73 | #define OHS_NOREAD 0x1000 /* If set no reading should be performed */ |
74 | #define OHS_ERROR (0 | OHS_NOREAD) /* Error condition */ | |
8b5ca511 DDO |
75 | #define OHS_ADD_HEADERS (1 | OHS_NOREAD) /* Adding header lines to request */ |
76 | #define OHS_WRITE_INIT (2 | OHS_NOREAD) /* 1st call: ready to start send */ | |
77 | #define OHS_WRITE_HDR (3 | OHS_NOREAD) /* Request header being sent */ | |
78 | #define OHS_WRITE_REQ (4 | OHS_NOREAD) /* Request contents being sent */ | |
79 | #define OHS_FLUSH (5 | OHS_NOREAD) /* Request being flushed */ | |
be799eb7 DDO |
80 | #define OHS_FIRSTLINE 1 /* First line of response being read */ |
81 | #define OHS_HEADERS 2 /* MIME headers of response being read */ | |
82 | #define OHS_REDIRECT 3 /* MIME headers being read, expecting Location */ | |
83 | #define OHS_ASN1_HEADER 4 /* ASN1 sequence header (tag+length) being read */ | |
84 | #define OHS_ASN1_CONTENT 5 /* ASN1 content octets being read */ | |
85 | #define OHS_ASN1_DONE (6 | OHS_NOREAD) /* ASN1 content read completed */ | |
86 | #define OHS_STREAM (7 | OHS_NOREAD) /* HTTP content stream to be read */ | |
29f178bd | 87 | |
19f97fe6 DDO |
88 | /* Low-level HTTP API implementation */ |
89 | ||
68bb06f7 | 90 | OSSL_HTTP_REQ_CTX *OSSL_HTTP_REQ_CTX_new(BIO *wbio, BIO *rbio, int buf_size) |
29f178bd DDO |
91 | { |
92 | OSSL_HTTP_REQ_CTX *rctx; | |
93 | ||
94 | if (wbio == NULL || rbio == NULL) { | |
9311d0c4 | 95 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
96 | return NULL; |
97 | } | |
98 | ||
99 | if ((rctx = OPENSSL_zalloc(sizeof(*rctx))) == NULL) | |
100 | return NULL; | |
101 | rctx->state = OHS_ERROR; | |
647a5dbf | 102 | rctx->buf_size = buf_size > 0 ? buf_size : OSSL_HTTP_DEFAULT_MAX_LINE_LEN; |
e2c38c1a | 103 | rctx->buf = OPENSSL_malloc(rctx->buf_size); |
29f178bd DDO |
104 | rctx->wbio = wbio; |
105 | rctx->rbio = rbio; | |
e2c38c1a | 106 | if (rctx->buf == NULL) { |
a6d40689 | 107 | OPENSSL_free(rctx); |
29f178bd DDO |
108 | return NULL; |
109 | } | |
647a5dbf | 110 | rctx->max_resp_len = OSSL_HTTP_DEFAULT_MAX_RESP_LEN; |
a6d40689 | 111 | /* everything else is 0, e.g. rctx->len_to_send, or NULL, e.g. rctx->mem */ |
29f178bd DDO |
112 | return rctx; |
113 | } | |
114 | ||
115 | void OSSL_HTTP_REQ_CTX_free(OSSL_HTTP_REQ_CTX *rctx) | |
116 | { | |
117 | if (rctx == NULL) | |
118 | return; | |
19f97fe6 DDO |
119 | /* |
120 | * Use BIO_free_all() because bio_update_fn may prepend or append to cbio. | |
121 | * This also frees any (e.g., SSL/TLS) BIOs linked with bio and, | |
122 | * like BIO_reset(bio), calls SSL_shutdown() to notify/alert the peer. | |
123 | */ | |
124 | if (rctx->free_wbio) | |
125 | BIO_free_all(rctx->wbio); | |
126 | /* do not free rctx->rbio */ | |
de5a0198 TM |
127 | BIO_free(rctx->mem); |
128 | BIO_free(rctx->req); | |
e2c38c1a | 129 | OPENSSL_free(rctx->buf); |
19f97fe6 DDO |
130 | OPENSSL_free(rctx->proxy); |
131 | OPENSSL_free(rctx->server); | |
132 | OPENSSL_free(rctx->port); | |
8f965908 | 133 | OPENSSL_free(rctx->expected_ct); |
29f178bd DDO |
134 | OPENSSL_free(rctx); |
135 | } | |
136 | ||
4d190f99 | 137 | BIO *OSSL_HTTP_REQ_CTX_get0_mem_bio(const OSSL_HTTP_REQ_CTX *rctx) |
29f178bd DDO |
138 | { |
139 | if (rctx == NULL) { | |
9311d0c4 | 140 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
141 | return NULL; |
142 | } | |
143 | return rctx->mem; | |
144 | } | |
145 | ||
8f965908 DDO |
146 | size_t OSSL_HTTP_REQ_CTX_get_resp_len(const OSSL_HTTP_REQ_CTX *rctx) |
147 | { | |
148 | if (rctx == NULL) { | |
149 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
150 | return 0; | |
151 | } | |
152 | return rctx->resp_len; | |
153 | } | |
154 | ||
29f178bd DDO |
155 | void OSSL_HTTP_REQ_CTX_set_max_response_length(OSSL_HTTP_REQ_CTX *rctx, |
156 | unsigned long len) | |
157 | { | |
158 | if (rctx == NULL) { | |
9311d0c4 | 159 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
160 | return; |
161 | } | |
647a5dbf | 162 | rctx->max_resp_len = len != 0 ? (size_t)len : OSSL_HTTP_DEFAULT_MAX_RESP_LEN; |
29f178bd DDO |
163 | } |
164 | ||
165 | /* | |
534725fd | 166 | * Create request line using |rctx| and |path| (or "/" in case |path| is NULL). |
29f178bd DDO |
167 | * Server name (and port) must be given if and only if plain HTTP proxy is used. |
168 | */ | |
534725fd | 169 | int OSSL_HTTP_REQ_CTX_set_request_line(OSSL_HTTP_REQ_CTX *rctx, int method_POST, |
cddbcf02 DDO |
170 | const char *server, const char *port, |
171 | const char *path) | |
29f178bd DDO |
172 | { |
173 | if (rctx == NULL) { | |
9311d0c4 | 174 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
175 | return 0; |
176 | } | |
a6d40689 DDO |
177 | BIO_free(rctx->mem); |
178 | if ((rctx->mem = BIO_new(BIO_s_mem())) == NULL) | |
179 | return 0; | |
29f178bd | 180 | |
534725fd | 181 | rctx->method_POST = method_POST != 0; |
046fba44 | 182 | if (BIO_printf(rctx->mem, "%s ", rctx->method_POST ? "POST" : "GET") <= 0) |
29f178bd DDO |
183 | return 0; |
184 | ||
185 | if (server != NULL) { /* HTTP (but not HTTPS) proxy is used */ | |
186 | /* | |
187 | * Section 5.1.2 of RFC 1945 states that the absoluteURI form is only | |
188 | * allowed when using a proxy | |
189 | */ | |
4b1fe471 | 190 | if (BIO_printf(rctx->mem, OSSL_HTTP_PREFIX"%s", server) <= 0) |
29f178bd DDO |
191 | return 0; |
192 | if (port != NULL && BIO_printf(rctx->mem, ":%s", port) <= 0) | |
193 | return 0; | |
194 | } | |
195 | ||
196 | /* Make sure path includes a forward slash */ | |
197 | if (path == NULL) | |
198 | path = "/"; | |
199 | if (path[0] != '/' && BIO_printf(rctx->mem, "/") <= 0) | |
200 | return 0; | |
95c0b295 DDO |
201 | /* |
202 | * Add (the rest of) the path and the HTTP version, | |
203 | * which is fixed to 1.0 for straightforward implementation of keep-alive | |
204 | */ | |
19f97fe6 | 205 | if (BIO_printf(rctx->mem, "%s "HTTP_1_0"\r\n", path) <= 0) |
29f178bd | 206 | return 0; |
95c0b295 | 207 | |
19f97fe6 | 208 | rctx->resp_len = 0; |
8b5ca511 | 209 | rctx->state = OHS_ADD_HEADERS; |
29f178bd DDO |
210 | return 1; |
211 | } | |
212 | ||
213 | int OSSL_HTTP_REQ_CTX_add1_header(OSSL_HTTP_REQ_CTX *rctx, | |
214 | const char *name, const char *value) | |
215 | { | |
216 | if (rctx == NULL || name == NULL) { | |
9311d0c4 | 217 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
218 | return 0; |
219 | } | |
a6d40689 DDO |
220 | if (rctx->mem == NULL) { |
221 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
222 | return 0; | |
223 | } | |
29f178bd DDO |
224 | |
225 | if (BIO_puts(rctx->mem, name) <= 0) | |
226 | return 0; | |
227 | if (value != NULL) { | |
228 | if (BIO_write(rctx->mem, ": ", 2) != 2) | |
229 | return 0; | |
230 | if (BIO_puts(rctx->mem, value) <= 0) | |
231 | return 0; | |
232 | } | |
19f97fe6 | 233 | return BIO_write(rctx->mem, "\r\n", 2) == 2; |
29f178bd DDO |
234 | } |
235 | ||
8f965908 DDO |
236 | int OSSL_HTTP_REQ_CTX_set_expected(OSSL_HTTP_REQ_CTX *rctx, |
237 | const char *content_type, int asn1, | |
238 | int timeout, int keep_alive) | |
239 | { | |
240 | if (rctx == NULL) { | |
241 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
242 | return 0; | |
243 | } | |
244 | if (keep_alive != 0 | |
8b5ca511 | 245 | && rctx->state != OHS_ERROR && rctx->state != OHS_ADD_HEADERS) { |
8f965908 DDO |
246 | /* Cannot anymore set keep-alive in request header */ |
247 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
248 | return 0; | |
249 | } | |
250 | ||
251 | OPENSSL_free(rctx->expected_ct); | |
252 | rctx->expected_ct = NULL; | |
253 | if (content_type != NULL | |
254 | && (rctx->expected_ct = OPENSSL_strdup(content_type)) == NULL) | |
255 | return 0; | |
256 | ||
257 | rctx->expect_asn1 = asn1; | |
258 | if (timeout >= 0) | |
259 | rctx->max_time = timeout > 0 ? time(NULL) + timeout : 0; | |
6a1f9cdc | 260 | else /* take over any |overall_timeout| arg of OSSL_HTTP_open(), else 0 */ |
8f965908 DDO |
261 | rctx->max_time = rctx->max_total_time; |
262 | rctx->keep_alive = keep_alive; | |
263 | return 1; | |
264 | } | |
265 | ||
de5a0198 TM |
266 | static int set1_content(OSSL_HTTP_REQ_CTX *rctx, |
267 | const char *content_type, BIO *req) | |
29f178bd | 268 | { |
29f178bd DDO |
269 | long req_len; |
270 | ||
8b5ca511 | 271 | if (rctx == NULL || (req == NULL && content_type != NULL)) { |
9311d0c4 | 272 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
273 | return 0; |
274 | } | |
19f97fe6 DDO |
275 | |
276 | if (rctx->keep_alive != 0 | |
277 | && !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Connection", "keep-alive")) | |
278 | return 0; | |
19f97fe6 | 279 | |
95c0b295 DDO |
280 | BIO_free(rctx->req); |
281 | rctx->req = NULL; | |
8b5ca511 | 282 | if (req == NULL) |
19f97fe6 DDO |
283 | return 1; |
284 | if (!rctx->method_POST) { | |
0a20cc4b DDO |
285 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
286 | return 0; | |
287 | } | |
29f178bd DDO |
288 | |
289 | if (content_type != NULL | |
290 | && BIO_printf(rctx->mem, "Content-Type: %s\r\n", content_type) <= 0) | |
291 | return 0; | |
292 | ||
de5a0198 | 293 | /* streaming BIO may not support querying size */ |
95c0b295 DDO |
294 | if (((req_len = BIO_ctrl(req, BIO_CTRL_INFO, 0, NULL)) <= 0 |
295 | || BIO_printf(rctx->mem, "Content-Length: %ld\r\n", req_len) > 0) | |
296 | && BIO_up_ref(req)) { | |
de5a0198 TM |
297 | rctx->req = req; |
298 | return 1; | |
299 | } | |
300 | return 0; | |
29f178bd DDO |
301 | } |
302 | ||
1c8505fb | 303 | int OSSL_HTTP_REQ_CTX_set1_req(OSSL_HTTP_REQ_CTX *rctx, const char *content_type, |
8f965908 | 304 | const ASN1_ITEM *it, const ASN1_VALUE *req) |
29f178bd | 305 | { |
95c0b295 DDO |
306 | BIO *mem = NULL; |
307 | int res = 1; | |
29f178bd | 308 | |
95c0b295 DDO |
309 | if (req != NULL) |
310 | res = (mem = ASN1_item_i2d_mem_bio(it, req)) != NULL; | |
311 | res = res && set1_content(rctx, content_type, mem); | |
29f178bd DDO |
312 | BIO_free(mem); |
313 | return res; | |
314 | } | |
315 | ||
e2c38c1a DDO |
316 | static int add1_headers(OSSL_HTTP_REQ_CTX *rctx, |
317 | const STACK_OF(CONF_VALUE) *headers, const char *host) | |
29f178bd DDO |
318 | { |
319 | int i; | |
19a39b29 | 320 | int add_host = host != NULL && *host != '\0'; |
29f178bd DDO |
321 | CONF_VALUE *hdr; |
322 | ||
323 | for (i = 0; i < sk_CONF_VALUE_num(headers); i++) { | |
324 | hdr = sk_CONF_VALUE_value(headers, i); | |
fba140c7 | 325 | if (add_host && OPENSSL_strcasecmp("host", hdr->name) == 0) |
29f178bd DDO |
326 | add_host = 0; |
327 | if (!OSSL_HTTP_REQ_CTX_add1_header(rctx, hdr->name, hdr->value)) | |
328 | return 0; | |
329 | } | |
330 | ||
331 | if (add_host && !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Host", host)) | |
332 | return 0; | |
333 | return 1; | |
334 | } | |
335 | ||
19f97fe6 DDO |
336 | /* Create OSSL_HTTP_REQ_CTX structure using the values provided. */ |
337 | static OSSL_HTTP_REQ_CTX *http_req_ctx_new(int free_wbio, BIO *wbio, BIO *rbio, | |
338 | OSSL_HTTP_bio_cb_t bio_update_fn, | |
339 | void *arg, int use_ssl, | |
340 | const char *proxy, | |
341 | const char *server, const char *port, | |
be799eb7 | 342 | int buf_size, int overall_timeout) |
29f178bd | 343 | { |
19f97fe6 | 344 | OSSL_HTTP_REQ_CTX *rctx = OSSL_HTTP_REQ_CTX_new(wbio, rbio, buf_size); |
29f178bd | 345 | |
19f97fe6 | 346 | if (rctx == NULL) |
29f178bd | 347 | return NULL; |
19f97fe6 DDO |
348 | rctx->free_wbio = free_wbio; |
349 | rctx->upd_fn = bio_update_fn; | |
350 | rctx->upd_arg = arg; | |
351 | rctx->use_ssl = use_ssl; | |
352 | if (proxy != NULL | |
353 | && (rctx->proxy = OPENSSL_strdup(proxy)) == NULL) | |
354 | goto err; | |
355 | if (server != NULL | |
356 | && (rctx->server = OPENSSL_strdup(server)) == NULL) | |
357 | goto err; | |
358 | if (port != NULL | |
359 | && (rctx->port = OPENSSL_strdup(port)) == NULL) | |
360 | goto err; | |
361 | rctx->max_total_time = | |
362 | overall_timeout > 0 ? time(NULL) + overall_timeout : 0; | |
363 | return rctx; | |
29f178bd | 364 | |
19f97fe6 | 365 | err: |
29f178bd DDO |
366 | OSSL_HTTP_REQ_CTX_free(rctx); |
367 | return NULL; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Parse first HTTP response line. This should be like this: "HTTP/1.0 200 OK". | |
e2b7dc35 DDO |
372 | * We need to obtain the status code and (optional) informational message. |
373 | * Return any received HTTP response status code, or 0 on fatal error. | |
29f178bd DDO |
374 | */ |
375 | ||
19f97fe6 | 376 | static int parse_http_line1(char *line, int *found_keep_alive) |
29f178bd | 377 | { |
e2b7dc35 | 378 | int i, retcode, err; |
29f178bd DDO |
379 | char *code, *reason, *end; |
380 | ||
2ff286c2 | 381 | if (!CHECK_AND_SKIP_PREFIX(line, HTTP_PREFIX_VERSION)) |
19f97fe6 DDO |
382 | goto err; |
383 | /* above HTTP 1.0, connection persistence is the default */ | |
2ff286c2 | 384 | *found_keep_alive = *line > '0'; |
19f97fe6 | 385 | |
29f178bd DDO |
386 | /* Skip to first whitespace (past protocol info) */ |
387 | for (code = line; *code != '\0' && !ossl_isspace(*code); code++) | |
388 | continue; | |
19f97fe6 DDO |
389 | if (*code == '\0') |
390 | goto err; | |
29f178bd DDO |
391 | |
392 | /* Skip past whitespace to start of response code */ | |
393 | while (*code != '\0' && ossl_isspace(*code)) | |
394 | code++; | |
19f97fe6 DDO |
395 | if (*code == '\0') |
396 | goto err; | |
29f178bd DDO |
397 | |
398 | /* Find end of response code: first whitespace after start of code */ | |
399 | for (reason = code; *reason != '\0' && !ossl_isspace(*reason); reason++) | |
400 | continue; | |
401 | ||
19f97fe6 DDO |
402 | if (*reason == '\0') |
403 | goto err; | |
29f178bd DDO |
404 | |
405 | /* Set end of response code and start of message */ | |
406 | *reason++ = '\0'; | |
407 | ||
408 | /* Attempt to parse numeric code */ | |
409 | retcode = strtoul(code, &end, 10); | |
29f178bd | 410 | if (*end != '\0') |
19f97fe6 | 411 | goto err; |
29f178bd DDO |
412 | |
413 | /* Skip over any leading whitespace in message */ | |
414 | while (*reason != '\0' && ossl_isspace(*reason)) | |
415 | reason++; | |
416 | ||
417 | if (*reason != '\0') { | |
418 | /* | |
419 | * Finally zap any trailing whitespace in message (include CRLF) | |
420 | */ | |
421 | ||
422 | /* chop any trailing whitespace from reason */ | |
423 | /* We know reason has a non-whitespace character so this is OK */ | |
424 | for (end = reason + strlen(reason) - 1; ossl_isspace(*end); end--) | |
425 | *end = '\0'; | |
426 | } | |
427 | ||
428 | switch (retcode) { | |
429 | case HTTP_STATUS_CODE_OK: | |
430 | case HTTP_STATUS_CODE_MOVED_PERMANENTLY: | |
431 | case HTTP_STATUS_CODE_FOUND: | |
432 | return retcode; | |
433 | default: | |
e2b7dc35 | 434 | err = HTTP_R_RECEIVED_ERROR; |
29f178bd | 435 | if (retcode < 400) |
e2b7dc35 | 436 | err = HTTP_R_STATUS_CODE_UNSUPPORTED; |
29f178bd | 437 | if (*reason == '\0') |
e2b7dc35 | 438 | ERR_raise_data(ERR_LIB_HTTP, err, "code=%s", code); |
29f178bd | 439 | else |
e2b7dc35 DDO |
440 | ERR_raise_data(ERR_LIB_HTTP, err, "code=%s, reason=%s", code, |
441 | reason); | |
442 | return retcode; | |
29f178bd | 443 | } |
19f97fe6 DDO |
444 | |
445 | err: | |
e2b7dc35 DDO |
446 | for (i = 0; i < 60 && line[i] != '\0'; i++) |
447 | if (!ossl_isprint(line[i])) | |
448 | line[i] = ' '; | |
be799eb7 DDO |
449 | line[i] = '\0'; |
450 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR, "content=%s", line); | |
19f97fe6 | 451 | return 0; |
29f178bd DDO |
452 | } |
453 | ||
be799eb7 | 454 | static int check_set_resp_len(OSSL_HTTP_REQ_CTX *rctx, size_t len) |
29f178bd | 455 | { |
be799eb7 | 456 | if (rctx->max_resp_len != 0 && len > rctx->max_resp_len) |
a150f8e1 | 457 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MAX_RESP_LEN_EXCEEDED, |
be799eb7 | 458 | "length=%zu, max=%zu", len, rctx->max_resp_len); |
a150f8e1 RL |
459 | if (rctx->resp_len != 0 && rctx->resp_len != len) |
460 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_INCONSISTENT_CONTENT_LENGTH, | |
be799eb7 | 461 | "ASN.1 length=%zu, Content-Length=%zu", |
d337af18 | 462 | len, rctx->resp_len); |
29f178bd DDO |
463 | rctx->resp_len = len; |
464 | return 1; | |
465 | } | |
466 | ||
f0d5a3b6 DDO |
467 | static int may_still_retry(time_t max_time, int *ptimeout) |
468 | { | |
469 | time_t time_diff, now = time(NULL); | |
470 | ||
471 | if (max_time != 0) { | |
472 | if (max_time < now) { | |
473 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RETRY_TIMEOUT); | |
474 | return 0; | |
475 | } | |
476 | time_diff = max_time - now; | |
477 | *ptimeout = time_diff > INT_MAX ? INT_MAX : (int)time_diff; | |
478 | } | |
479 | return 1; | |
480 | } | |
481 | ||
29f178bd DDO |
482 | /* |
483 | * Try exchanging request and response via HTTP on (non-)blocking BIO in rctx. | |
484 | * Returns 1 on success, 0 on error or redirection, -1 on BIO_should_retry. | |
485 | */ | |
486 | int OSSL_HTTP_REQ_CTX_nbio(OSSL_HTTP_REQ_CTX *rctx) | |
487 | { | |
19f97fe6 | 488 | int i, found_expected_ct = 0, found_keep_alive = 0; |
e8fdb060 | 489 | int found_text_ct = 0; |
673474b1 | 490 | long n; |
be799eb7 | 491 | size_t resp_len; |
29f178bd | 492 | const unsigned char *p; |
606c79e2 | 493 | char *buf, *key, *value, *line_end = NULL; |
29f178bd DDO |
494 | |
495 | if (rctx == NULL) { | |
9311d0c4 | 496 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
497 | return 0; |
498 | } | |
a6d40689 DDO |
499 | if (rctx->mem == NULL || rctx->wbio == NULL || rctx->rbio == NULL) { |
500 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
501 | return 0; | |
502 | } | |
29f178bd DDO |
503 | |
504 | rctx->redirection_url = NULL; | |
505 | next_io: | |
606c79e2 | 506 | buf = (char *)rctx->buf; |
29f178bd | 507 | if ((rctx->state & OHS_NOREAD) == 0) { |
606c79e2 | 508 | if (rctx->expect_asn1) { |
e2c38c1a | 509 | n = BIO_read(rctx->rbio, rctx->buf, rctx->buf_size); |
606c79e2 DDO |
510 | } else { |
511 | (void)ERR_set_mark(); | |
512 | n = BIO_gets(rctx->rbio, buf, rctx->buf_size); | |
513 | if (n == -2) { /* some BIOs, such as SSL, do not support "gets" */ | |
514 | (void)ERR_pop_to_mark(); | |
515 | n = BIO_get_line(rctx->rbio, buf, rctx->buf_size); | |
516 | } else { | |
517 | (void)ERR_clear_last_mark(); | |
518 | } | |
519 | } | |
29f178bd DDO |
520 | if (n <= 0) { |
521 | if (BIO_should_retry(rctx->rbio)) | |
522 | return -1; | |
a6d40689 | 523 | ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA); |
29f178bd DDO |
524 | return 0; |
525 | } | |
526 | ||
527 | /* Write data to memory BIO */ | |
e2c38c1a | 528 | if (BIO_write(rctx->mem, rctx->buf, n) != n) |
29f178bd DDO |
529 | return 0; |
530 | } | |
531 | ||
532 | switch (rctx->state) { | |
8b5ca511 | 533 | case OHS_ADD_HEADERS: |
29f178bd DDO |
534 | /* Last operation was adding headers: need a final \r\n */ |
535 | if (BIO_write(rctx->mem, "\r\n", 2) != 2) { | |
536 | rctx->state = OHS_ERROR; | |
537 | return 0; | |
538 | } | |
539 | rctx->state = OHS_WRITE_INIT; | |
540 | ||
541 | /* fall thru */ | |
542 | case OHS_WRITE_INIT: | |
8b5ca511 DDO |
543 | rctx->len_to_send = BIO_get_mem_data(rctx->mem, &rctx->pos); |
544 | rctx->state = OHS_WRITE_HDR; | |
e8fdb060 DDO |
545 | if (OSSL_TRACE_ENABLED(HTTP)) |
546 | OSSL_TRACE(HTTP, "Sending request header:\n"); | |
29f178bd DDO |
547 | |
548 | /* fall thru */ | |
8b5ca511 DDO |
549 | case OHS_WRITE_HDR: |
550 | /* Copy some chunk of data from rctx->mem to rctx->wbio */ | |
551 | case OHS_WRITE_REQ: | |
552 | /* Copy some chunk of data from rctx->req to rctx->wbio */ | |
553 | ||
554 | if (rctx->len_to_send > 0) { | |
e8fdb060 DDO |
555 | if (OSSL_TRACE_ENABLED(HTTP) |
556 | && rctx->state == OHS_WRITE_HDR && rctx->len_to_send <= INT_MAX) | |
557 | OSSL_TRACE2(HTTP, "%.*s", (int)rctx->len_to_send, rctx->pos); | |
558 | ||
8b5ca511 DDO |
559 | i = BIO_write(rctx->wbio, rctx->pos, rctx->len_to_send); |
560 | if (i <= 0) { | |
561 | if (BIO_should_retry(rctx->wbio)) | |
562 | return -1; | |
563 | rctx->state = OHS_ERROR; | |
564 | return 0; | |
565 | } | |
566 | rctx->pos += i; | |
567 | rctx->len_to_send -= i; | |
568 | goto next_io; | |
29f178bd | 569 | } |
8b5ca511 DDO |
570 | if (rctx->state == OHS_WRITE_HDR) { |
571 | (void)BIO_reset(rctx->mem); | |
572 | rctx->state = OHS_WRITE_REQ; | |
573 | } | |
574 | if (rctx->req != NULL && !BIO_eof(rctx->req)) { | |
e2c38c1a | 575 | n = BIO_read(rctx->req, rctx->buf, rctx->buf_size); |
8b5ca511 DDO |
576 | if (n <= 0) { |
577 | if (BIO_should_retry(rctx->rbio)) | |
578 | return -1; | |
579 | ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA); | |
580 | return 0; | |
581 | } | |
e2c38c1a | 582 | rctx->pos = rctx->buf; |
8b5ca511 | 583 | rctx->len_to_send = n; |
29f178bd | 584 | goto next_io; |
8b5ca511 | 585 | } |
29f178bd DDO |
586 | rctx->state = OHS_FLUSH; |
587 | ||
29f178bd DDO |
588 | /* fall thru */ |
589 | case OHS_FLUSH: | |
590 | ||
591 | i = BIO_flush(rctx->wbio); | |
592 | ||
593 | if (i > 0) { | |
594 | rctx->state = OHS_FIRSTLINE; | |
595 | goto next_io; | |
596 | } | |
597 | ||
598 | if (BIO_should_retry(rctx->wbio)) | |
599 | return -1; | |
600 | ||
601 | rctx->state = OHS_ERROR; | |
602 | return 0; | |
603 | ||
604 | case OHS_ERROR: | |
605 | return 0; | |
606 | ||
607 | case OHS_FIRSTLINE: | |
608 | case OHS_HEADERS: | |
609 | case OHS_REDIRECT: | |
610 | ||
611 | /* Attempt to read a line in */ | |
612 | next_line: | |
613 | /* | |
614 | * Due to strange memory BIO behavior with BIO_gets we have to check | |
615 | * there's a complete line in there before calling BIO_gets or we'll | |
616 | * just get a partial read. | |
617 | */ | |
618 | n = BIO_get_mem_data(rctx->mem, &p); | |
619 | if (n <= 0 || memchr(p, '\n', n) == 0) { | |
e2c38c1a | 620 | if (n >= rctx->buf_size) { |
29f178bd DDO |
621 | rctx->state = OHS_ERROR; |
622 | return 0; | |
623 | } | |
624 | goto next_io; | |
625 | } | |
606c79e2 | 626 | n = BIO_gets(rctx->mem, buf, rctx->buf_size); |
29f178bd DDO |
627 | |
628 | if (n <= 0) { | |
629 | if (BIO_should_retry(rctx->mem)) | |
630 | goto next_io; | |
631 | rctx->state = OHS_ERROR; | |
632 | return 0; | |
633 | } | |
634 | ||
635 | /* Don't allow excessive lines */ | |
e2c38c1a | 636 | if (n == rctx->buf_size) { |
9311d0c4 | 637 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RESPONSE_LINE_TOO_LONG); |
29f178bd DDO |
638 | rctx->state = OHS_ERROR; |
639 | return 0; | |
640 | } | |
641 | ||
e8fdb060 DDO |
642 | /* dump all response header lines */ |
643 | if (OSSL_TRACE_ENABLED(HTTP)) { | |
644 | if (rctx->state == OHS_FIRSTLINE) | |
645 | OSSL_TRACE(HTTP, "Received response header:\n"); | |
646 | OSSL_TRACE1(HTTP, "%s", buf); | |
647 | } | |
648 | ||
29f178bd DDO |
649 | /* First line */ |
650 | if (rctx->state == OHS_FIRSTLINE) { | |
606c79e2 | 651 | switch (parse_http_line1(buf, &found_keep_alive)) { |
29f178bd DDO |
652 | case HTTP_STATUS_CODE_OK: |
653 | rctx->state = OHS_HEADERS; | |
654 | goto next_line; | |
655 | case HTTP_STATUS_CODE_MOVED_PERMANENTLY: | |
656 | case HTTP_STATUS_CODE_FOUND: /* i.e., moved temporarily */ | |
046fba44 | 657 | if (!rctx->method_POST) { /* method is GET */ |
29f178bd DDO |
658 | rctx->state = OHS_REDIRECT; |
659 | goto next_line; | |
660 | } | |
9311d0c4 | 661 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED); |
29f178bd DDO |
662 | /* redirection is not supported/recommended for POST */ |
663 | /* fall through */ | |
664 | default: | |
665 | rctx->state = OHS_ERROR; | |
38288f42 | 666 | goto next_line; |
29f178bd DDO |
667 | } |
668 | } | |
606c79e2 | 669 | key = buf; |
29f178bd DDO |
670 | value = strchr(key, ':'); |
671 | if (value != NULL) { | |
672 | *(value++) = '\0'; | |
673 | while (ossl_isspace(*value)) | |
674 | value++; | |
675 | line_end = strchr(value, '\r'); | |
676 | if (line_end == NULL) | |
677 | line_end = strchr(value, '\n'); | |
678 | if (line_end != NULL) | |
679 | *line_end = '\0'; | |
680 | } | |
681 | if (value != NULL && line_end != NULL) { | |
afe554c2 | 682 | if (rctx->state == OHS_REDIRECT |
fba140c7 | 683 | && OPENSSL_strcasecmp(key, "Location") == 0) { |
29f178bd DDO |
684 | rctx->redirection_url = value; |
685 | return 0; | |
686 | } | |
e8fdb060 DDO |
687 | if (OPENSSL_strcasecmp(key, "Content-Type") == 0) { |
688 | if (rctx->state == OHS_HEADERS | |
689 | && rctx->expected_ct != NULL) { | |
690 | if (OPENSSL_strcasecmp(rctx->expected_ct, value) != 0) { | |
691 | ERR_raise_data(ERR_LIB_HTTP, | |
692 | HTTP_R_UNEXPECTED_CONTENT_TYPE, | |
693 | "expected=%s, actual=%s", | |
694 | rctx->expected_ct, value); | |
695 | return 0; | |
696 | } | |
697 | found_expected_ct = 1; | |
29f178bd | 698 | } |
e8fdb060 DDO |
699 | if (OPENSSL_strncasecmp(value, "text/", 5) == 0) |
700 | found_text_ct = 1; | |
19f97fe6 DDO |
701 | } |
702 | ||
703 | /* https://tools.ietf.org/html/rfc7230#section-6.3 Persistence */ | |
fba140c7 DB |
704 | if (OPENSSL_strcasecmp(key, "Connection") == 0) { |
705 | if (OPENSSL_strcasecmp(value, "keep-alive") == 0) | |
19f97fe6 | 706 | found_keep_alive = 1; |
fba140c7 | 707 | else if (OPENSSL_strcasecmp(value, "close") == 0) |
19f97fe6 | 708 | found_keep_alive = 0; |
fba140c7 | 709 | } else if (OPENSSL_strcasecmp(key, "Content-Length") == 0) { |
be799eb7 | 710 | resp_len = (size_t)strtoul(value, &line_end, 10); |
29f178bd | 711 | if (line_end == value || *line_end != '\0') { |
a150f8e1 RL |
712 | ERR_raise_data(ERR_LIB_HTTP, |
713 | HTTP_R_ERROR_PARSING_CONTENT_LENGTH, | |
714 | "input=%s", value); | |
29f178bd DDO |
715 | return 0; |
716 | } | |
717 | if (!check_set_resp_len(rctx, resp_len)) | |
718 | return 0; | |
719 | } | |
720 | } | |
721 | ||
d337af18 | 722 | /* Look for blank line indicating end of headers */ |
e2c38c1a | 723 | for (p = rctx->buf; *p != '\0'; p++) { |
29f178bd DDO |
724 | if (*p != '\r' && *p != '\n') |
725 | break; | |
726 | } | |
727 | if (*p != '\0') /* not end of headers */ | |
728 | goto next_line; | |
729 | ||
19f97fe6 DDO |
730 | if (rctx->keep_alive != 0 /* do not let server initiate keep_alive */ |
731 | && !found_keep_alive /* otherwise there is no change */) { | |
732 | if (rctx->keep_alive == 2) { | |
733 | rctx->keep_alive = 0; | |
734 | ERR_raise(ERR_LIB_HTTP, HTTP_R_SERVER_CANCELED_CONNECTION); | |
735 | return 0; | |
736 | } | |
737 | rctx->keep_alive = 0; | |
738 | } | |
739 | ||
e8fdb060 DDO |
740 | if (rctx->state == OHS_ERROR) { |
741 | if (OSSL_TRACE_ENABLED(HTTP) | |
742 | && found_text_ct && BIO_get_mem_data(rctx->mem, &p) > 0) | |
743 | OSSL_TRACE1(HTTP, "%s", p); | |
38288f42 | 744 | return 0; |
e8fdb060 | 745 | } |
38288f42 DDO |
746 | |
747 | if (rctx->expected_ct != NULL && !found_expected_ct) { | |
748 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MISSING_CONTENT_TYPE, | |
749 | "expected=%s", rctx->expected_ct); | |
750 | return 0; | |
751 | } | |
29f178bd DDO |
752 | if (rctx->state == OHS_REDIRECT) { |
753 | /* http status code indicated redirect but there was no Location */ | |
9311d0c4 | 754 | ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_REDIRECT_LOCATION); |
29f178bd DDO |
755 | return 0; |
756 | } | |
757 | ||
758 | if (!rctx->expect_asn1) { | |
be799eb7 DDO |
759 | rctx->state = OHS_STREAM; |
760 | return 1; | |
29f178bd DDO |
761 | } |
762 | ||
763 | rctx->state = OHS_ASN1_HEADER; | |
764 | ||
765 | /* Fall thru */ | |
766 | case OHS_ASN1_HEADER: | |
767 | /* | |
768 | * Now reading ASN1 header: can read at least 2 bytes which is enough | |
769 | * for ASN1 SEQUENCE header and either length field or at least the | |
770 | * length of the length field. | |
771 | */ | |
772 | n = BIO_get_mem_data(rctx->mem, &p); | |
773 | if (n < 2) | |
774 | goto next_io; | |
775 | ||
776 | /* Check it is an ASN1 SEQUENCE */ | |
777 | if (*p++ != (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) { | |
9311d0c4 | 778 | ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_ASN1_ENCODING); |
29f178bd DDO |
779 | return 0; |
780 | } | |
781 | ||
782 | /* Check out length field */ | |
783 | if ((*p & 0x80) != 0) { | |
784 | /* | |
785 | * If MSB set on initial length octet we can now always read 6 | |
786 | * octets: make sure we have them. | |
787 | */ | |
788 | if (n < 6) | |
789 | goto next_io; | |
790 | n = *p & 0x7F; | |
791 | /* Not NDEF or excessive length */ | |
792 | if (n == 0 || (n > 4)) { | |
9311d0c4 | 793 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_PARSING_ASN1_LENGTH); |
29f178bd DDO |
794 | return 0; |
795 | } | |
796 | p++; | |
797 | resp_len = 0; | |
798 | for (i = 0; i < n; i++) { | |
799 | resp_len <<= 8; | |
800 | resp_len |= *p++; | |
801 | } | |
802 | resp_len += n + 2; | |
803 | } else { | |
804 | resp_len = *p + 2; | |
805 | } | |
806 | if (!check_set_resp_len(rctx, resp_len)) | |
807 | return 0; | |
808 | ||
be799eb7 | 809 | rctx->state = OHS_ASN1_CONTENT; |
29f178bd DDO |
810 | |
811 | /* Fall thru */ | |
be799eb7 | 812 | case OHS_ASN1_CONTENT: |
29f178bd DDO |
813 | default: |
814 | n = BIO_get_mem_data(rctx->mem, NULL); | |
be799eb7 | 815 | if (n < 0 || (size_t)n < rctx->resp_len) |
29f178bd DDO |
816 | goto next_io; |
817 | ||
be799eb7 | 818 | rctx->state = OHS_ASN1_DONE; |
29f178bd DDO |
819 | return 1; |
820 | } | |
821 | } | |
822 | ||
8f965908 DDO |
823 | int OSSL_HTTP_REQ_CTX_nbio_d2i(OSSL_HTTP_REQ_CTX *rctx, |
824 | ASN1_VALUE **pval, const ASN1_ITEM *it) | |
825 | { | |
826 | const unsigned char *p; | |
827 | int rv; | |
828 | ||
829 | *pval = NULL; | |
830 | if ((rv = OSSL_HTTP_REQ_CTX_nbio(rctx)) != 1) | |
831 | return rv; | |
832 | *pval = ASN1_item_d2i(NULL, &p, BIO_get_mem_data(rctx->mem, &p), it); | |
833 | return *pval != NULL; | |
834 | ||
835 | } | |
836 | ||
29f178bd DDO |
837 | #ifndef OPENSSL_NO_SOCK |
838 | ||
839 | /* set up a new connection BIO, to HTTP server or to HTTP(S) proxy if given */ | |
e2c38c1a | 840 | static BIO *http_new_bio(const char *server /* optionally includes ":port" */, |
afe554c2 | 841 | const char *server_port /* explicit server port */, |
79a2bccd DDO |
842 | int use_ssl, |
843 | const char *proxy /* optionally includes ":port" */, | |
844 | const char *proxy_port /* explicit proxy port */) | |
29f178bd | 845 | { |
79a2bccd | 846 | const char *host = server; |
29f178bd DDO |
847 | const char *port = server_port; |
848 | BIO *cbio; | |
849 | ||
4b1fe471 | 850 | if (!ossl_assert(server != NULL)) |
29f178bd | 851 | return NULL; |
29f178bd DDO |
852 | |
853 | if (proxy != NULL) { | |
854 | host = proxy; | |
79a2bccd | 855 | port = proxy_port; |
29f178bd | 856 | } |
afe554c2 | 857 | |
79a2bccd DDO |
858 | if (port == NULL && strchr(host, ':') == NULL) |
859 | port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT; | |
afe554c2 DDO |
860 | |
861 | cbio = BIO_new_connect(host /* optionally includes ":port" */); | |
29f178bd DDO |
862 | if (cbio == NULL) |
863 | goto end; | |
864 | if (port != NULL) | |
865 | (void)BIO_set_conn_port(cbio, port); | |
866 | ||
867 | end: | |
868 | return cbio; | |
869 | } | |
e8d0819d | 870 | #endif /* OPENSSL_NO_SOCK */ |
29f178bd | 871 | |
82990287 | 872 | /* Exchange request and response via HTTP on (non-)blocking BIO */ |
8f965908 | 873 | BIO *OSSL_HTTP_REQ_CTX_exchange(OSSL_HTTP_REQ_CTX *rctx) |
29f178bd | 874 | { |
29f178bd DDO |
875 | int rv; |
876 | ||
877 | if (rctx == NULL) { | |
9311d0c4 | 878 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
879 | return NULL; |
880 | } | |
881 | ||
882 | for (;;) { | |
883 | rv = OSSL_HTTP_REQ_CTX_nbio(rctx); | |
884 | if (rv != -1) | |
885 | break; | |
886 | /* BIO_should_retry was true */ | |
29f178bd | 887 | /* will not actually wait if rctx->max_time == 0 */ |
e8d0819d | 888 | if (BIO_wait(rctx->rbio, rctx->max_time, 100 /* milliseconds */) <= 0) |
29f178bd DDO |
889 | return NULL; |
890 | } | |
891 | ||
892 | if (rv == 0) { | |
893 | if (rctx->redirection_url == NULL) { /* an error occurred */ | |
1e6174b1 | 894 | if (rctx->len_to_send > 0) |
9311d0c4 | 895 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_SENDING); |
29f178bd | 896 | else |
9311d0c4 | 897 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_RECEIVING); |
29f178bd DDO |
898 | } |
899 | return NULL; | |
900 | } | |
be799eb7 | 901 | return rctx->state == OHS_STREAM ? rctx->rbio : rctx->mem; |
29f178bd DDO |
902 | } |
903 | ||
19f97fe6 | 904 | int OSSL_HTTP_is_alive(const OSSL_HTTP_REQ_CTX *rctx) |
29f178bd | 905 | { |
19f97fe6 | 906 | return rctx != NULL && rctx->keep_alive != 0; |
29f178bd DDO |
907 | } |
908 | ||
19f97fe6 DDO |
909 | /* High-level HTTP API implementation */ |
910 | ||
911 | /* Initiate an HTTP session using bio, else use given server, proxy, etc. */ | |
8f965908 DDO |
912 | OSSL_HTTP_REQ_CTX *OSSL_HTTP_open(const char *server, const char *port, |
913 | const char *proxy, const char *no_proxy, | |
914 | int use_ssl, BIO *bio, BIO *rbio, | |
915 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
be799eb7 | 916 | int buf_size, int overall_timeout) |
8f965908 | 917 | { |
19f97fe6 DDO |
918 | BIO *cbio; /* == bio if supplied, used as connection BIO if rbio is NULL */ |
919 | OSSL_HTTP_REQ_CTX *rctx = NULL; | |
29f178bd DDO |
920 | |
921 | if (use_ssl && bio_update_fn == NULL) { | |
9311d0c4 | 922 | ERR_raise(ERR_LIB_HTTP, HTTP_R_TLS_NOT_ENABLED); |
29f178bd DDO |
923 | return NULL; |
924 | } | |
925 | if (rbio != NULL && (bio == NULL || bio_update_fn != NULL)) { | |
9311d0c4 | 926 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); |
29f178bd DDO |
927 | return NULL; |
928 | } | |
29f178bd | 929 | |
4b1fe471 | 930 | if (bio != NULL) { |
29f178bd | 931 | cbio = bio; |
82990287 DDO |
932 | if (proxy != NULL || no_proxy != NULL) { |
933 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); | |
934 | return NULL; | |
935 | } | |
4b1fe471 | 936 | } else { |
e8d0819d | 937 | #ifndef OPENSSL_NO_SOCK |
79a2bccd DDO |
938 | char *proxy_host = NULL, *proxy_port = NULL; |
939 | ||
4b1fe471 | 940 | if (server == NULL) { |
9311d0c4 | 941 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
4b1fe471 DDO |
942 | return NULL; |
943 | } | |
19f97fe6 | 944 | if (port != NULL && *port == '\0') |
4b1fe471 DDO |
945 | port = NULL; |
946 | if (port == NULL && strchr(server, ':') == NULL) | |
947 | port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT; | |
ab9d67ef | 948 | proxy = OSSL_HTTP_adapt_proxy(proxy, no_proxy, server, use_ssl); |
79a2bccd DDO |
949 | if (proxy != NULL |
950 | && !OSSL_HTTP_parse_url(proxy, NULL /* use_ssl */, NULL /* user */, | |
951 | &proxy_host, &proxy_port, NULL /* num */, | |
952 | NULL /* path */, NULL, NULL)) | |
953 | return NULL; | |
e2c38c1a | 954 | cbio = http_new_bio(server, port, use_ssl, proxy_host, proxy_port); |
79a2bccd DDO |
955 | OPENSSL_free(proxy_host); |
956 | OPENSSL_free(proxy_port); | |
957 | if (cbio == NULL) | |
e8d0819d DDO |
958 | return NULL; |
959 | #else | |
9311d0c4 | 960 | ERR_raise(ERR_LIB_HTTP, HTTP_R_SOCK_NOT_SUPPORTED); |
29f178bd | 961 | return NULL; |
e8d0819d | 962 | #endif |
4b1fe471 | 963 | } |
29f178bd DDO |
964 | |
965 | (void)ERR_set_mark(); /* prepare removing any spurious libssl errors */ | |
19f97fe6 DDO |
966 | if (rbio == NULL && BIO_do_connect_retry(cbio, overall_timeout, -1) <= 0) { |
967 | if (bio == NULL) /* cbio was not provided by caller */ | |
968 | BIO_free_all(cbio); | |
29f178bd | 969 | goto end; |
19f97fe6 DDO |
970 | } |
971 | /* now overall_timeout is guaranteed to be >= 0 */ | |
29f178bd | 972 | |
068549f8 | 973 | /* adapt in order to fix callback design flaw, see #17088 */ |
29f178bd DDO |
974 | /* callback can be used to wrap or prepend TLS session */ |
975 | if (bio_update_fn != NULL) { | |
976 | BIO *orig_bio = cbio; | |
19f97fe6 | 977 | |
35750cb9 | 978 | cbio = (*bio_update_fn)(cbio, arg, 1 /* connect */, use_ssl != 0); |
29f178bd | 979 | if (cbio == NULL) { |
981a5b7c DDO |
980 | if (bio == NULL) /* cbio was not provided by caller */ |
981 | BIO_free_all(orig_bio); | |
29f178bd DDO |
982 | goto end; |
983 | } | |
984 | } | |
985 | ||
19f97fe6 DDO |
986 | rctx = http_req_ctx_new(bio == NULL, cbio, rbio != NULL ? rbio : cbio, |
987 | bio_update_fn, arg, use_ssl, proxy, server, port, | |
be799eb7 | 988 | buf_size, overall_timeout); |
19f97fe6 DDO |
989 | |
990 | end: | |
991 | if (rctx != NULL) | |
992 | /* remove any spurious error queue entries by ssl_add_cert_chain() */ | |
993 | (void)ERR_pop_to_mark(); | |
994 | else | |
995 | (void)ERR_clear_last_mark(); | |
996 | ||
997 | return rctx; | |
998 | } | |
999 | ||
8ccbf00d DDO |
1000 | int OSSL_HTTP_set1_request(OSSL_HTTP_REQ_CTX *rctx, const char *path, |
1001 | const STACK_OF(CONF_VALUE) *headers, | |
1002 | const char *content_type, BIO *req, | |
1003 | const char *expected_content_type, int expect_asn1, | |
1004 | size_t max_resp_len, int timeout, int keep_alive) | |
19f97fe6 DDO |
1005 | { |
1006 | int use_http_proxy; | |
1007 | ||
1008 | if (rctx == NULL) { | |
1009 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
1010 | return 0; | |
1011 | } | |
1012 | use_http_proxy = rctx->proxy != NULL && !rctx->use_ssl; | |
266383b4 | 1013 | if (use_http_proxy && rctx->server == NULL) { |
19f97fe6 DDO |
1014 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); |
1015 | return 0; | |
1016 | } | |
be799eb7 | 1017 | rctx->max_resp_len = max_resp_len; /* allows for 0: indefinite */ |
19f97fe6 | 1018 | |
8b5ca511 | 1019 | return OSSL_HTTP_REQ_CTX_set_request_line(rctx, req != NULL, |
19f97fe6 DDO |
1020 | use_http_proxy ? rctx->server |
1021 | : NULL, rctx->port, path) | |
e2c38c1a | 1022 | && add1_headers(rctx, headers, rctx->server) |
19f97fe6 DDO |
1023 | && OSSL_HTTP_REQ_CTX_set_expected(rctx, expected_content_type, |
1024 | expect_asn1, timeout, keep_alive) | |
de5a0198 | 1025 | && set1_content(rctx, content_type, req); |
19f97fe6 DDO |
1026 | } |
1027 | ||
1028 | /*- | |
1029 | * Exchange single HTTP request and response according to rctx. | |
1030 | * If rctx->method_POST then use POST, else use GET and ignore content_type. | |
1031 | * The redirection_url output (freed by caller) parameter is used only for GET. | |
1032 | */ | |
1033 | BIO *OSSL_HTTP_exchange(OSSL_HTTP_REQ_CTX *rctx, char **redirection_url) | |
1034 | { | |
1035 | BIO *resp; | |
1036 | ||
1037 | if (rctx == NULL) { | |
1038 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
1039 | return NULL; | |
1040 | } | |
1041 | ||
1042 | if (redirection_url != NULL) | |
1043 | *redirection_url = NULL; /* do this beforehand to prevent dbl free */ | |
29f178bd | 1044 | |
8f965908 | 1045 | resp = OSSL_HTTP_REQ_CTX_exchange(rctx); |
29f178bd DDO |
1046 | if (resp == NULL) { |
1047 | if (rctx->redirection_url != NULL) { | |
1048 | if (redirection_url == NULL) | |
9311d0c4 | 1049 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED); |
29f178bd DDO |
1050 | else |
1051 | /* may be NULL if out of memory: */ | |
1052 | *redirection_url = OPENSSL_strdup(rctx->redirection_url); | |
1053 | } else { | |
1054 | char buf[200]; | |
1055 | unsigned long err = ERR_peek_error(); | |
1056 | int lib = ERR_GET_LIB(err); | |
1057 | int reason = ERR_GET_REASON(err); | |
1058 | ||
1059 | if (lib == ERR_LIB_SSL || lib == ERR_LIB_HTTP | |
1060 | || (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_TIMEOUT) | |
1061 | || (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_ERROR) | |
4b1fe471 | 1062 | #ifndef OPENSSL_NO_CMP |
29f178bd | 1063 | || (lib == ERR_LIB_CMP |
100cc8b0 | 1064 | && reason == CMP_R_POTENTIALLY_INVALID_CERTIFICATE) |
4b1fe471 | 1065 | #endif |
100cc8b0 | 1066 | ) { |
19f97fe6 | 1067 | if (rctx->server != NULL) { |
22fe2b12 DDO |
1068 | BIO_snprintf(buf, sizeof(buf), "server=http%s://%s%s%s", |
1069 | rctx->use_ssl ? "s" : "", rctx->server, | |
1070 | rctx->port != NULL ? ":" : "", | |
1071 | rctx->port != NULL ? rctx->port : ""); | |
1072 | ERR_add_error_data(1, buf); | |
19f97fe6 | 1073 | } |
19f97fe6 DDO |
1074 | if (rctx->proxy != NULL) |
1075 | ERR_add_error_data(2, " proxy=", rctx->proxy); | |
29f178bd | 1076 | if (err == 0) { |
22fe2b12 | 1077 | BIO_snprintf(buf, sizeof(buf), " peer has disconnected%s", |
19f97fe6 | 1078 | rctx->use_ssl ? " violating the protocol" : |
29f178bd DDO |
1079 | ", likely because it requires the use of TLS"); |
1080 | ERR_add_error_data(1, buf); | |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | } | |
6466cc97 DDO |
1085 | |
1086 | if (resp != NULL && !BIO_up_ref(resp)) | |
1087 | resp = NULL; | |
29f178bd DDO |
1088 | return resp; |
1089 | } | |
1090 | ||
1091 | static int redirection_ok(int n_redir, const char *old_url, const char *new_url) | |
1092 | { | |
29f178bd | 1093 | if (n_redir >= HTTP_VERSION_MAX_REDIRECTIONS) { |
9311d0c4 | 1094 | ERR_raise(ERR_LIB_HTTP, HTTP_R_TOO_MANY_REDIRECTIONS); |
29f178bd DDO |
1095 | return 0; |
1096 | } | |
1097 | if (*new_url == '/') /* redirection to same server => same protocol */ | |
1098 | return 1; | |
b6fec965 DDO |
1099 | if (HAS_PREFIX(old_url, OSSL_HTTPS_NAME":") && |
1100 | !HAS_PREFIX(new_url, OSSL_HTTPS_NAME":")) { | |
9311d0c4 | 1101 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_FROM_HTTPS_TO_HTTP); |
29f178bd DDO |
1102 | return 0; |
1103 | } | |
1104 | return 1; | |
1105 | } | |
1106 | ||
1107 | /* Get data via HTTP from server at given URL, potentially with redirection */ | |
afe554c2 | 1108 | BIO *OSSL_HTTP_get(const char *url, const char *proxy, const char *no_proxy, |
29f178bd DDO |
1109 | BIO *bio, BIO *rbio, |
1110 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
68bb06f7 | 1111 | int buf_size, const STACK_OF(CONF_VALUE) *headers, |
8f965908 | 1112 | const char *expected_ct, int expect_asn1, |
c4005c8b | 1113 | size_t max_resp_len, int timeout) |
29f178bd | 1114 | { |
8f965908 | 1115 | char *current_url, *redirection_url = NULL; |
29f178bd DDO |
1116 | int n_redirs = 0; |
1117 | char *host; | |
1118 | char *port; | |
1119 | char *path; | |
1120 | int use_ssl; | |
19f97fe6 | 1121 | OSSL_HTTP_REQ_CTX *rctx; |
29f178bd | 1122 | BIO *resp = NULL; |
f0d5a3b6 | 1123 | time_t max_time = timeout > 0 ? time(NULL) + timeout : 0; |
29f178bd DDO |
1124 | |
1125 | if (url == NULL) { | |
9311d0c4 | 1126 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
1127 | return NULL; |
1128 | } | |
1129 | if ((current_url = OPENSSL_strdup(url)) == NULL) | |
1130 | return NULL; | |
1131 | ||
1132 | for (;;) { | |
7932982b DDO |
1133 | if (!OSSL_HTTP_parse_url(current_url, &use_ssl, NULL /* user */, &host, |
1134 | &port, NULL /* port_num */, &path, NULL, NULL)) | |
29f178bd DDO |
1135 | break; |
1136 | ||
19f97fe6 DDO |
1137 | rctx = OSSL_HTTP_open(host, port, proxy, no_proxy, |
1138 | use_ssl, bio, rbio, bio_update_fn, arg, | |
be799eb7 | 1139 | buf_size, timeout); |
8801240b | 1140 | new_rpath: |
19f97fe6 | 1141 | if (rctx != NULL) { |
8ccbf00d DDO |
1142 | if (!OSSL_HTTP_set1_request(rctx, path, headers, |
1143 | NULL /* content_type */, | |
1144 | NULL /* req */, | |
1145 | expected_ct, expect_asn1, max_resp_len, | |
1146 | -1 /* use same max time (timeout) */, | |
1147 | 0 /* no keep_alive */)) | |
19f97fe6 | 1148 | OSSL_HTTP_REQ_CTX_free(rctx); |
8801240b | 1149 | else |
19f97fe6 | 1150 | resp = OSSL_HTTP_exchange(rctx, &redirection_url); |
19f97fe6 | 1151 | } |
29f178bd DDO |
1152 | OPENSSL_free(path); |
1153 | if (resp == NULL && redirection_url != NULL) { | |
f0d5a3b6 DDO |
1154 | if (redirection_ok(++n_redirs, current_url, redirection_url) |
1155 | && may_still_retry(max_time, &timeout)) { | |
29f178bd DDO |
1156 | (void)BIO_reset(bio); |
1157 | OPENSSL_free(current_url); | |
1158 | current_url = redirection_url; | |
1159 | if (*redirection_url == '/') { /* redirection to same server */ | |
1160 | path = OPENSSL_strdup(redirection_url); | |
816d6e57 JJ |
1161 | if (path == NULL) { |
1162 | OPENSSL_free(host); | |
1163 | OPENSSL_free(port); | |
1164 | (void)OSSL_HTTP_close(rctx, 1); | |
1165 | BIO_free(resp); | |
1166 | OPENSSL_free(current_url); | |
1167 | return NULL; | |
1168 | } | |
29f178bd DDO |
1169 | goto new_rpath; |
1170 | } | |
1171 | OPENSSL_free(host); | |
1172 | OPENSSL_free(port); | |
8801240b | 1173 | (void)OSSL_HTTP_close(rctx, 1); |
29f178bd DDO |
1174 | continue; |
1175 | } | |
8801240b | 1176 | /* if redirection not allowed, ignore it */ |
29f178bd DDO |
1177 | OPENSSL_free(redirection_url); |
1178 | } | |
1179 | OPENSSL_free(host); | |
1180 | OPENSSL_free(port); | |
8801240b DDO |
1181 | if (!OSSL_HTTP_close(rctx, resp != NULL)) { |
1182 | BIO_free(resp); | |
1183 | resp = NULL; | |
1184 | } | |
29f178bd DDO |
1185 | break; |
1186 | } | |
1187 | OPENSSL_free(current_url); | |
1188 | return resp; | |
1189 | } | |
1190 | ||
82990287 | 1191 | /* Exchange request and response over a connection managed via |prctx| */ |
19f97fe6 DDO |
1192 | BIO *OSSL_HTTP_transfer(OSSL_HTTP_REQ_CTX **prctx, |
1193 | const char *server, const char *port, | |
1194 | const char *path, int use_ssl, | |
1195 | const char *proxy, const char *no_proxy, | |
1196 | BIO *bio, BIO *rbio, | |
1197 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
1198 | int buf_size, const STACK_OF(CONF_VALUE) *headers, | |
1199 | const char *content_type, BIO *req, | |
1200 | const char *expected_ct, int expect_asn1, | |
be799eb7 | 1201 | size_t max_resp_len, int timeout, int keep_alive) |
19f97fe6 DDO |
1202 | { |
1203 | OSSL_HTTP_REQ_CTX *rctx = prctx == NULL ? NULL : *prctx; | |
1204 | BIO *resp = NULL; | |
1205 | ||
1206 | if (rctx == NULL) { | |
1207 | rctx = OSSL_HTTP_open(server, port, proxy, no_proxy, | |
1208 | use_ssl, bio, rbio, bio_update_fn, arg, | |
be799eb7 | 1209 | buf_size, timeout); |
19f97fe6 DDO |
1210 | timeout = -1; /* Already set during opening the connection */ |
1211 | } | |
1212 | if (rctx != NULL) { | |
8ccbf00d DDO |
1213 | if (OSSL_HTTP_set1_request(rctx, path, headers, content_type, req, |
1214 | expected_ct, expect_asn1, | |
1215 | max_resp_len, timeout, keep_alive)) | |
19f97fe6 DDO |
1216 | resp = OSSL_HTTP_exchange(rctx, NULL); |
1217 | if (resp == NULL || !OSSL_HTTP_is_alive(rctx)) { | |
82990287 DDO |
1218 | if (!OSSL_HTTP_close(rctx, resp != NULL)) { |
1219 | BIO_free(resp); | |
19f97fe6 | 1220 | resp = NULL; |
82990287 | 1221 | } |
19f97fe6 DDO |
1222 | rctx = NULL; |
1223 | } | |
1224 | } | |
1225 | if (prctx != NULL) | |
1226 | *prctx = rctx; | |
1227 | return resp; | |
1228 | } | |
1229 | ||
8f965908 | 1230 | int OSSL_HTTP_close(OSSL_HTTP_REQ_CTX *rctx, int ok) |
29f178bd | 1231 | { |
cdaf072f | 1232 | BIO *wbio; |
19f97fe6 DDO |
1233 | int ret = 1; |
1234 | ||
cdaf072f DDO |
1235 | /* callback can be used to finish TLS session and free its BIO */ |
1236 | if (rctx != NULL && rctx->upd_fn != NULL) { | |
1237 | wbio = (*rctx->upd_fn)(rctx->wbio, rctx->upd_arg, | |
1238 | 0 /* disconnect */, ok); | |
1239 | ret = wbio != NULL; | |
1240 | if (ret) | |
1241 | rctx->wbio = wbio; | |
1242 | } | |
19f97fe6 DDO |
1243 | OSSL_HTTP_REQ_CTX_free(rctx); |
1244 | return ret; | |
29f178bd DDO |
1245 | } |
1246 | ||
1247 | /* BASE64 encoder used for encoding basic proxy authentication credentials */ | |
1248 | static char *base64encode(const void *buf, size_t len) | |
1249 | { | |
1250 | int i; | |
1251 | size_t outl; | |
1252 | char *out; | |
1253 | ||
1254 | /* Calculate size of encoded data */ | |
1255 | outl = (len / 3); | |
1256 | if (len % 3 > 0) | |
1257 | outl++; | |
1258 | outl <<= 2; | |
1259 | out = OPENSSL_malloc(outl + 1); | |
1260 | if (out == NULL) | |
1261 | return 0; | |
1262 | ||
1263 | i = EVP_EncodeBlock((unsigned char *)out, buf, len); | |
1264 | if (!ossl_assert(0 <= i && (size_t)i <= outl)) { | |
1265 | OPENSSL_free(out); | |
1266 | return NULL; | |
1267 | } | |
1268 | return out; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Promote the given connection BIO using the CONNECT method for a TLS proxy. | |
1273 | * This is typically called by an app, so bio_err and prog are used unless NULL | |
1274 | * to print additional diagnostic information in a user-oriented way. | |
1275 | */ | |
1276 | int OSSL_HTTP_proxy_connect(BIO *bio, const char *server, const char *port, | |
1277 | const char *proxyuser, const char *proxypass, | |
1278 | int timeout, BIO *bio_err, const char *prog) | |
1279 | { | |
4b1fe471 DDO |
1280 | #undef BUF_SIZE |
1281 | #define BUF_SIZE (8 * 1024) | |
29f178bd DDO |
1282 | char *mbuf = OPENSSL_malloc(BUF_SIZE); |
1283 | char *mbufp; | |
1284 | int read_len = 0; | |
29f178bd DDO |
1285 | int ret = 0; |
1286 | BIO *fbio = BIO_new(BIO_f_buffer()); | |
e8d0819d | 1287 | int rv; |
29f178bd DDO |
1288 | time_t max_time = timeout > 0 ? time(NULL) + timeout : 0; |
1289 | ||
4b1fe471 | 1290 | if (bio == NULL || server == NULL |
29f178bd | 1291 | || (bio_err != NULL && prog == NULL)) { |
9311d0c4 | 1292 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
1293 | goto end; |
1294 | } | |
4b1fe471 DDO |
1295 | if (port == NULL || *port == '\0') |
1296 | port = OSSL_HTTPS_PORT; | |
29f178bd DDO |
1297 | |
1298 | if (mbuf == NULL || fbio == NULL) { | |
1299 | BIO_printf(bio_err /* may be NULL */, "%s: out of memory", prog); | |
1300 | goto end; | |
1301 | } | |
1302 | BIO_push(fbio, bio); | |
1303 | ||
19f97fe6 | 1304 | BIO_printf(fbio, "CONNECT %s:%s "HTTP_1_0"\r\n", server, port); |
29f178bd DDO |
1305 | |
1306 | /* | |
1307 | * Workaround for broken proxies which would otherwise close | |
1308 | * the connection when entering tunnel mode (e.g., Squid 2.6) | |
1309 | */ | |
1310 | BIO_printf(fbio, "Proxy-Connection: Keep-Alive\r\n"); | |
1311 | ||
1312 | /* Support for basic (base64) proxy authentication */ | |
1313 | if (proxyuser != NULL) { | |
1314 | size_t len = strlen(proxyuser) + 1; | |
1315 | char *proxyauth, *proxyauthenc = NULL; | |
1316 | ||
1317 | if (proxypass != NULL) | |
1318 | len += strlen(proxypass); | |
1319 | proxyauth = OPENSSL_malloc(len + 1); | |
1320 | if (proxyauth == NULL) | |
1321 | goto end; | |
1322 | if (BIO_snprintf(proxyauth, len + 1, "%s:%s", proxyuser, | |
1323 | proxypass != NULL ? proxypass : "") != (int)len) | |
1324 | goto proxy_end; | |
1325 | proxyauthenc = base64encode(proxyauth, len); | |
1326 | if (proxyauthenc != NULL) { | |
1327 | BIO_printf(fbio, "Proxy-Authorization: Basic %s\r\n", proxyauthenc); | |
1328 | OPENSSL_clear_free(proxyauthenc, strlen(proxyauthenc)); | |
1329 | } | |
a6d40689 | 1330 | proxy_end: |
29f178bd DDO |
1331 | OPENSSL_clear_free(proxyauth, len); |
1332 | if (proxyauthenc == NULL) | |
1333 | goto end; | |
1334 | } | |
1335 | ||
1336 | /* Terminate the HTTP CONNECT request */ | |
1337 | BIO_printf(fbio, "\r\n"); | |
1338 | ||
1339 | for (;;) { | |
1340 | if (BIO_flush(fbio) != 0) | |
1341 | break; | |
1342 | /* potentially needs to be retried if BIO is non-blocking */ | |
1343 | if (!BIO_should_retry(fbio)) | |
1344 | break; | |
1345 | } | |
1346 | ||
1347 | for (;;) { | |
1348 | /* will not actually wait if timeout == 0 */ | |
e8d0819d | 1349 | rv = BIO_wait(fbio, max_time, 100 /* milliseconds */); |
29f178bd DDO |
1350 | if (rv <= 0) { |
1351 | BIO_printf(bio_err, "%s: HTTP CONNECT %s\n", prog, | |
1352 | rv == 0 ? "timed out" : "failed waiting for data"); | |
1353 | goto end; | |
1354 | } | |
1355 | ||
1356 | /*- | |
1357 | * The first line is the HTTP response. | |
1358 | * According to RFC 7230, it is formatted exactly like this: | |
552aeaef | 1359 | * HTTP/d.d ddd reason text\r\n |
29f178bd DDO |
1360 | */ |
1361 | read_len = BIO_gets(fbio, mbuf, BUF_SIZE); | |
1362 | /* the BIO may not block, so we must wait for the 1st line to come in */ | |
765860a3 | 1363 | if (read_len < (int)HTTP_LINE1_MINLEN) |
29f178bd DDO |
1364 | continue; |
1365 | ||
19f97fe6 | 1366 | /* Check for HTTP/1.x */ |
2ff286c2 | 1367 | mbufp = mbuf; |
2490d10d | 1368 | if (!CHECK_AND_SKIP_PREFIX(mbufp, HTTP_PREFIX)) { |
19f97fe6 | 1369 | ERR_raise(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR); |
29f178bd DDO |
1370 | BIO_printf(bio_err, "%s: HTTP CONNECT failed, non-HTTP response\n", |
1371 | prog); | |
1372 | /* Wrong protocol, not even HTTP, so stop reading headers */ | |
1373 | goto end; | |
1374 | } | |
2ff286c2 | 1375 | if (!HAS_PREFIX(mbufp, HTTP_VERSION_PATT)) { |
9311d0c4 | 1376 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RECEIVED_WRONG_HTTP_VERSION); |
29f178bd DDO |
1377 | BIO_printf(bio_err, |
1378 | "%s: HTTP CONNECT failed, bad HTTP version %.*s\n", | |
19f97fe6 | 1379 | prog, (int)HTTP_VERSION_STR_LEN, mbufp); |
29f178bd DDO |
1380 | goto end; |
1381 | } | |
1382 | mbufp += HTTP_VERSION_STR_LEN; | |
19f97fe6 DDO |
1383 | |
1384 | /* RFC 7231 4.3.6: any 2xx status code is valid */ | |
b6fec965 | 1385 | if (!HAS_PREFIX(mbufp, " 2")) { |
2490d10d DDO |
1386 | if (ossl_isspace(*mbufp)) |
1387 | mbufp++; | |
29f178bd DDO |
1388 | /* chop any trailing whitespace */ |
1389 | while (read_len > 0 && ossl_isspace(mbuf[read_len - 1])) | |
1390 | read_len--; | |
1391 | mbuf[read_len] = '\0'; | |
a150f8e1 | 1392 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_CONNECT_FAILURE, |
552aeaef DDO |
1393 | "reason=%s", mbufp); |
1394 | BIO_printf(bio_err, "%s: HTTP CONNECT failed, reason=%s\n", | |
29f178bd DDO |
1395 | prog, mbufp); |
1396 | goto end; | |
1397 | } | |
1398 | ret = 1; | |
1399 | break; | |
1400 | } | |
1401 | ||
1402 | /* Read past all following headers */ | |
1403 | do { | |
1404 | /* | |
60e91cc4 | 1405 | * This does not necessarily catch the case when the full |
29f178bd DDO |
1406 | * HTTP response came in in more than a single TCP message. |
1407 | */ | |
1408 | read_len = BIO_gets(fbio, mbuf, BUF_SIZE); | |
1409 | } while (read_len > 2); | |
1410 | ||
1411 | end: | |
1412 | if (fbio != NULL) { | |
1413 | (void)BIO_flush(fbio); | |
1414 | BIO_pop(fbio); | |
1415 | BIO_free(fbio); | |
1416 | } | |
1417 | OPENSSL_free(mbuf); | |
1418 | return ret; | |
4b1fe471 | 1419 | #undef BUF_SIZE |
29f178bd | 1420 | } |