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Commit | Line | Data |
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29f178bd | 1 | /* |
b6461792 | 2 | * Copyright 2001-2024 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 */ | |
c7340583 | 54 | char *server; /* Optional server hostname */ |
19f97fe6 | 55 | char *port; /* Optional server port */ |
7d5019c1 | 56 | BIO *mem; /* Mem BIO holding request header or response */ |
8b5ca511 | 57 | BIO *req; /* BIO holding the request provided by caller */ |
19f97fe6 | 58 | int method_POST; /* HTTP method is POST (else GET) */ |
35b76bc8 | 59 | int text; /* Request content type is (likely) text */ |
19f97fe6 DDO |
60 | char *expected_ct; /* Optional expected Content-Type */ |
61 | int expect_asn1; /* Response must be ASN.1-encoded */ | |
8b5ca511 DDO |
62 | unsigned char *pos; /* Current position sending data */ |
63 | long len_to_send; /* Number of bytes still to send */ | |
be799eb7 DDO |
64 | size_t resp_len; /* Length of response */ |
65 | size_t max_resp_len; /* Maximum length of response, or 0 */ | |
8f965908 DDO |
66 | int keep_alive; /* Persistent conn. 0=no, 1=prefer, 2=require */ |
67 | time_t max_time; /* Maximum end time of current transfer, or 0 */ | |
68 | time_t max_total_time; /* Maximum end time of total transfer, or 0 */ | |
19f97fe6 | 69 | char *redirection_url; /* Location obtained from HTTP status 301/302 */ |
7f8aba2f | 70 | size_t max_hdr_lines; /* Max. number of http hdr lines, or 0 */ |
29f178bd DDO |
71 | }; |
72 | ||
29f178bd DDO |
73 | /* HTTP states */ |
74 | ||
be799eb7 DDO |
75 | #define OHS_NOREAD 0x1000 /* If set no reading should be performed */ |
76 | #define OHS_ERROR (0 | OHS_NOREAD) /* Error condition */ | |
8b5ca511 DDO |
77 | #define OHS_ADD_HEADERS (1 | OHS_NOREAD) /* Adding header lines to request */ |
78 | #define OHS_WRITE_INIT (2 | OHS_NOREAD) /* 1st call: ready to start send */ | |
35b76bc8 DDO |
79 | #define OHS_WRITE_HDR1 (3 | OHS_NOREAD) /* Request header to be sent */ |
80 | #define OHS_WRITE_HDR (4 | OHS_NOREAD) /* Request header being sent */ | |
81 | #define OHS_WRITE_REQ (5 | OHS_NOREAD) /* Request content being sent */ | |
82 | #define OHS_FLUSH (6 | OHS_NOREAD) /* Request being flushed */ | |
be799eb7 DDO |
83 | #define OHS_FIRSTLINE 1 /* First line of response being read */ |
84 | #define OHS_HEADERS 2 /* MIME headers of response being read */ | |
35b76bc8 DDO |
85 | #define OHS_HEADERS_ERROR 3 /* MIME headers of resp. being read after error */ |
86 | #define OHS_REDIRECT 4 /* MIME headers being read, expecting Location */ | |
87 | #define OHS_ASN1_HEADER 5 /* ASN1 sequence header (tag+length) being read */ | |
88 | #define OHS_ASN1_CONTENT 6 /* ASN1 content octets being read */ | |
89 | #define OHS_ASN1_DONE (7 | OHS_NOREAD) /* ASN1 content read completed */ | |
90 | #define OHS_STREAM (8 | OHS_NOREAD) /* HTTP content stream to be read */ | |
29f178bd | 91 | |
19f97fe6 DDO |
92 | /* Low-level HTTP API implementation */ |
93 | ||
68bb06f7 | 94 | OSSL_HTTP_REQ_CTX *OSSL_HTTP_REQ_CTX_new(BIO *wbio, BIO *rbio, int buf_size) |
29f178bd DDO |
95 | { |
96 | OSSL_HTTP_REQ_CTX *rctx; | |
97 | ||
98 | if (wbio == NULL || rbio == NULL) { | |
9311d0c4 | 99 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
100 | return NULL; |
101 | } | |
102 | ||
103 | if ((rctx = OPENSSL_zalloc(sizeof(*rctx))) == NULL) | |
104 | return NULL; | |
105 | rctx->state = OHS_ERROR; | |
647a5dbf | 106 | rctx->buf_size = buf_size > 0 ? buf_size : OSSL_HTTP_DEFAULT_MAX_LINE_LEN; |
e2c38c1a | 107 | rctx->buf = OPENSSL_malloc(rctx->buf_size); |
29f178bd DDO |
108 | rctx->wbio = wbio; |
109 | rctx->rbio = rbio; | |
7f8aba2f | 110 | rctx->max_hdr_lines = OSSL_HTTP_DEFAULT_MAX_RESP_HDR_LINES; |
e2c38c1a | 111 | if (rctx->buf == NULL) { |
a6d40689 | 112 | OPENSSL_free(rctx); |
29f178bd DDO |
113 | return NULL; |
114 | } | |
647a5dbf | 115 | rctx->max_resp_len = OSSL_HTTP_DEFAULT_MAX_RESP_LEN; |
a6d40689 | 116 | /* everything else is 0, e.g. rctx->len_to_send, or NULL, e.g. rctx->mem */ |
29f178bd DDO |
117 | return rctx; |
118 | } | |
119 | ||
120 | void OSSL_HTTP_REQ_CTX_free(OSSL_HTTP_REQ_CTX *rctx) | |
121 | { | |
122 | if (rctx == NULL) | |
123 | return; | |
19f97fe6 DDO |
124 | /* |
125 | * Use BIO_free_all() because bio_update_fn may prepend or append to cbio. | |
126 | * This also frees any (e.g., SSL/TLS) BIOs linked with bio and, | |
127 | * like BIO_reset(bio), calls SSL_shutdown() to notify/alert the peer. | |
128 | */ | |
129 | if (rctx->free_wbio) | |
130 | BIO_free_all(rctx->wbio); | |
131 | /* do not free rctx->rbio */ | |
de5a0198 TM |
132 | BIO_free(rctx->mem); |
133 | BIO_free(rctx->req); | |
e2c38c1a | 134 | OPENSSL_free(rctx->buf); |
19f97fe6 DDO |
135 | OPENSSL_free(rctx->proxy); |
136 | OPENSSL_free(rctx->server); | |
137 | OPENSSL_free(rctx->port); | |
8f965908 | 138 | OPENSSL_free(rctx->expected_ct); |
29f178bd DDO |
139 | OPENSSL_free(rctx); |
140 | } | |
141 | ||
4d190f99 | 142 | BIO *OSSL_HTTP_REQ_CTX_get0_mem_bio(const OSSL_HTTP_REQ_CTX *rctx) |
29f178bd DDO |
143 | { |
144 | if (rctx == NULL) { | |
9311d0c4 | 145 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
146 | return NULL; |
147 | } | |
148 | return rctx->mem; | |
149 | } | |
150 | ||
8f965908 DDO |
151 | size_t OSSL_HTTP_REQ_CTX_get_resp_len(const OSSL_HTTP_REQ_CTX *rctx) |
152 | { | |
153 | if (rctx == NULL) { | |
154 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
155 | return 0; | |
156 | } | |
157 | return rctx->resp_len; | |
158 | } | |
159 | ||
29f178bd DDO |
160 | void OSSL_HTTP_REQ_CTX_set_max_response_length(OSSL_HTTP_REQ_CTX *rctx, |
161 | unsigned long len) | |
162 | { | |
163 | if (rctx == NULL) { | |
9311d0c4 | 164 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
165 | return; |
166 | } | |
647a5dbf | 167 | rctx->max_resp_len = len != 0 ? (size_t)len : OSSL_HTTP_DEFAULT_MAX_RESP_LEN; |
29f178bd DDO |
168 | } |
169 | ||
170 | /* | |
534725fd | 171 | * Create request line using |rctx| and |path| (or "/" in case |path| is NULL). |
45c02183 DDO |
172 | * Server name (and optional port) must be given if and only if |
173 | * a plain HTTP proxy is used and |path| does not begin with 'http://'. | |
29f178bd | 174 | */ |
534725fd | 175 | int OSSL_HTTP_REQ_CTX_set_request_line(OSSL_HTTP_REQ_CTX *rctx, int method_POST, |
cddbcf02 DDO |
176 | const char *server, const char *port, |
177 | const char *path) | |
29f178bd DDO |
178 | { |
179 | if (rctx == NULL) { | |
9311d0c4 | 180 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
181 | return 0; |
182 | } | |
a6d40689 DDO |
183 | BIO_free(rctx->mem); |
184 | if ((rctx->mem = BIO_new(BIO_s_mem())) == NULL) | |
185 | return 0; | |
29f178bd | 186 | |
534725fd | 187 | rctx->method_POST = method_POST != 0; |
046fba44 | 188 | if (BIO_printf(rctx->mem, "%s ", rctx->method_POST ? "POST" : "GET") <= 0) |
29f178bd DDO |
189 | return 0; |
190 | ||
191 | if (server != NULL) { /* HTTP (but not HTTPS) proxy is used */ | |
192 | /* | |
193 | * Section 5.1.2 of RFC 1945 states that the absoluteURI form is only | |
194 | * allowed when using a proxy | |
195 | */ | |
4b1fe471 | 196 | if (BIO_printf(rctx->mem, OSSL_HTTP_PREFIX"%s", server) <= 0) |
29f178bd DDO |
197 | return 0; |
198 | if (port != NULL && BIO_printf(rctx->mem, ":%s", port) <= 0) | |
199 | return 0; | |
200 | } | |
201 | ||
45c02183 DDO |
202 | /* Make sure path includes a forward slash (abs_path) */ |
203 | if (path == NULL) { | |
29f178bd | 204 | path = "/"; |
45c02183 DDO |
205 | } else if (HAS_PREFIX(path, "http://")) { /* absoluteURI for proxy use */ |
206 | if (server != NULL) { | |
207 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); | |
208 | return 0; | |
209 | } | |
210 | } else if (path[0] != '/' && BIO_printf(rctx->mem, "/") <= 0) { | |
29f178bd | 211 | return 0; |
45c02183 | 212 | } |
95c0b295 DDO |
213 | /* |
214 | * Add (the rest of) the path and the HTTP version, | |
215 | * which is fixed to 1.0 for straightforward implementation of keep-alive | |
216 | */ | |
19f97fe6 | 217 | if (BIO_printf(rctx->mem, "%s "HTTP_1_0"\r\n", path) <= 0) |
29f178bd | 218 | return 0; |
95c0b295 | 219 | |
19f97fe6 | 220 | rctx->resp_len = 0; |
8b5ca511 | 221 | rctx->state = OHS_ADD_HEADERS; |
29f178bd DDO |
222 | return 1; |
223 | } | |
224 | ||
225 | int OSSL_HTTP_REQ_CTX_add1_header(OSSL_HTTP_REQ_CTX *rctx, | |
226 | const char *name, const char *value) | |
227 | { | |
228 | if (rctx == NULL || name == NULL) { | |
9311d0c4 | 229 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
230 | return 0; |
231 | } | |
a6d40689 DDO |
232 | if (rctx->mem == NULL) { |
233 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
234 | return 0; | |
235 | } | |
29f178bd DDO |
236 | |
237 | if (BIO_puts(rctx->mem, name) <= 0) | |
238 | return 0; | |
239 | if (value != NULL) { | |
240 | if (BIO_write(rctx->mem, ": ", 2) != 2) | |
241 | return 0; | |
242 | if (BIO_puts(rctx->mem, value) <= 0) | |
243 | return 0; | |
244 | } | |
19f97fe6 | 245 | return BIO_write(rctx->mem, "\r\n", 2) == 2; |
29f178bd DDO |
246 | } |
247 | ||
8f965908 DDO |
248 | int OSSL_HTTP_REQ_CTX_set_expected(OSSL_HTTP_REQ_CTX *rctx, |
249 | const char *content_type, int asn1, | |
250 | int timeout, int keep_alive) | |
251 | { | |
252 | if (rctx == NULL) { | |
253 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
254 | return 0; | |
255 | } | |
256 | if (keep_alive != 0 | |
8b5ca511 | 257 | && rctx->state != OHS_ERROR && rctx->state != OHS_ADD_HEADERS) { |
8f965908 DDO |
258 | /* Cannot anymore set keep-alive in request header */ |
259 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
260 | return 0; | |
261 | } | |
262 | ||
263 | OPENSSL_free(rctx->expected_ct); | |
264 | rctx->expected_ct = NULL; | |
265 | if (content_type != NULL | |
266 | && (rctx->expected_ct = OPENSSL_strdup(content_type)) == NULL) | |
267 | return 0; | |
268 | ||
269 | rctx->expect_asn1 = asn1; | |
270 | if (timeout >= 0) | |
271 | rctx->max_time = timeout > 0 ? time(NULL) + timeout : 0; | |
6a1f9cdc | 272 | else /* take over any |overall_timeout| arg of OSSL_HTTP_open(), else 0 */ |
8f965908 DDO |
273 | rctx->max_time = rctx->max_total_time; |
274 | rctx->keep_alive = keep_alive; | |
275 | return 1; | |
276 | } | |
277 | ||
de5a0198 TM |
278 | static int set1_content(OSSL_HTTP_REQ_CTX *rctx, |
279 | const char *content_type, BIO *req) | |
29f178bd | 280 | { |
8c65e1f7 DDO |
281 | long req_len = 0; |
282 | #ifndef OPENSSL_NO_STDIO | |
243465fd | 283 | FILE *fp = NULL; |
8c65e1f7 | 284 | #endif |
29f178bd | 285 | |
8b5ca511 | 286 | if (rctx == NULL || (req == NULL && content_type != NULL)) { |
9311d0c4 | 287 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
288 | return 0; |
289 | } | |
19f97fe6 DDO |
290 | |
291 | if (rctx->keep_alive != 0 | |
292 | && !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Connection", "keep-alive")) | |
293 | return 0; | |
19f97fe6 | 294 | |
95c0b295 DDO |
295 | BIO_free(rctx->req); |
296 | rctx->req = NULL; | |
8b5ca511 | 297 | if (req == NULL) |
19f97fe6 DDO |
298 | return 1; |
299 | if (!rctx->method_POST) { | |
0a20cc4b DDO |
300 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
301 | return 0; | |
302 | } | |
29f178bd | 303 | |
35b76bc8 DDO |
304 | if (content_type == NULL) { |
305 | rctx->text = 1; /* assuming text by default, used just for tracing */ | |
306 | } else { | |
307 | if (OPENSSL_strncasecmp(content_type, "text/", 5) == 0) | |
308 | rctx->text = 1; | |
309 | if (BIO_printf(rctx->mem, "Content-Type: %s\r\n", content_type) <= 0) | |
310 | return 0; | |
311 | } | |
29f178bd | 312 | |
243465fd DDO |
313 | /* |
314 | * BIO_CTRL_INFO yields the data length at least for memory BIOs, but for | |
315 | * file-based BIOs it gives the current position, which is not what we need. | |
316 | */ | |
8c65e1f7 DDO |
317 | if (BIO_method_type(req) == BIO_TYPE_FILE) { |
318 | #ifndef OPENSSL_NO_STDIO | |
319 | if (BIO_get_fp(req, &fp) == 1 && fseek(fp, 0, SEEK_END) == 0) { | |
320 | req_len = ftell(fp); | |
321 | (void)fseek(fp, 0, SEEK_SET); | |
322 | } else { | |
323 | fp = NULL; | |
324 | } | |
325 | #endif | |
243465fd DDO |
326 | } else { |
327 | req_len = BIO_ctrl(req, BIO_CTRL_INFO, 0, NULL); | |
328 | /* | |
329 | * Streaming BIOs likely will not support querying the size at all, | |
330 | * and we assume we got a correct value if req_len > 0. | |
331 | */ | |
de5a0198 | 332 | } |
8c65e1f7 DDO |
333 | if (( |
334 | #ifndef OPENSSL_NO_STDIO | |
335 | fp != NULL /* definitely correct req_len */ || | |
336 | #endif | |
337 | req_len > 0) | |
243465fd DDO |
338 | && BIO_printf(rctx->mem, "Content-Length: %ld\r\n", req_len) < 0) |
339 | return 0; | |
340 | ||
341 | if (!BIO_up_ref(req)) | |
342 | return 0; | |
343 | rctx->req = req; | |
344 | return 1; | |
29f178bd DDO |
345 | } |
346 | ||
1c8505fb | 347 | int OSSL_HTTP_REQ_CTX_set1_req(OSSL_HTTP_REQ_CTX *rctx, const char *content_type, |
8f965908 | 348 | const ASN1_ITEM *it, const ASN1_VALUE *req) |
29f178bd | 349 | { |
95c0b295 DDO |
350 | BIO *mem = NULL; |
351 | int res = 1; | |
29f178bd | 352 | |
95c0b295 DDO |
353 | if (req != NULL) |
354 | res = (mem = ASN1_item_i2d_mem_bio(it, req)) != NULL; | |
355 | res = res && set1_content(rctx, content_type, mem); | |
29f178bd DDO |
356 | BIO_free(mem); |
357 | return res; | |
358 | } | |
359 | ||
7f8aba2f AN |
360 | void OSSL_HTTP_REQ_CTX_set_max_response_hdr_lines(OSSL_HTTP_REQ_CTX *rctx, |
361 | size_t count) | |
362 | { | |
363 | if (rctx == NULL) { | |
364 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
365 | return; | |
366 | } | |
367 | rctx->max_hdr_lines = count; | |
368 | } | |
369 | ||
e2c38c1a DDO |
370 | static int add1_headers(OSSL_HTTP_REQ_CTX *rctx, |
371 | const STACK_OF(CONF_VALUE) *headers, const char *host) | |
29f178bd DDO |
372 | { |
373 | int i; | |
19a39b29 | 374 | int add_host = host != NULL && *host != '\0'; |
29f178bd DDO |
375 | CONF_VALUE *hdr; |
376 | ||
377 | for (i = 0; i < sk_CONF_VALUE_num(headers); i++) { | |
378 | hdr = sk_CONF_VALUE_value(headers, i); | |
fba140c7 | 379 | if (add_host && OPENSSL_strcasecmp("host", hdr->name) == 0) |
29f178bd DDO |
380 | add_host = 0; |
381 | if (!OSSL_HTTP_REQ_CTX_add1_header(rctx, hdr->name, hdr->value)) | |
382 | return 0; | |
383 | } | |
384 | ||
385 | if (add_host && !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Host", host)) | |
386 | return 0; | |
387 | return 1; | |
388 | } | |
389 | ||
19f97fe6 DDO |
390 | /* Create OSSL_HTTP_REQ_CTX structure using the values provided. */ |
391 | static OSSL_HTTP_REQ_CTX *http_req_ctx_new(int free_wbio, BIO *wbio, BIO *rbio, | |
392 | OSSL_HTTP_bio_cb_t bio_update_fn, | |
393 | void *arg, int use_ssl, | |
394 | const char *proxy, | |
395 | const char *server, const char *port, | |
be799eb7 | 396 | int buf_size, int overall_timeout) |
29f178bd | 397 | { |
19f97fe6 | 398 | OSSL_HTTP_REQ_CTX *rctx = OSSL_HTTP_REQ_CTX_new(wbio, rbio, buf_size); |
29f178bd | 399 | |
19f97fe6 | 400 | if (rctx == NULL) |
29f178bd | 401 | return NULL; |
19f97fe6 DDO |
402 | rctx->free_wbio = free_wbio; |
403 | rctx->upd_fn = bio_update_fn; | |
404 | rctx->upd_arg = arg; | |
405 | rctx->use_ssl = use_ssl; | |
406 | if (proxy != NULL | |
407 | && (rctx->proxy = OPENSSL_strdup(proxy)) == NULL) | |
408 | goto err; | |
409 | if (server != NULL | |
410 | && (rctx->server = OPENSSL_strdup(server)) == NULL) | |
411 | goto err; | |
412 | if (port != NULL | |
413 | && (rctx->port = OPENSSL_strdup(port)) == NULL) | |
414 | goto err; | |
415 | rctx->max_total_time = | |
416 | overall_timeout > 0 ? time(NULL) + overall_timeout : 0; | |
417 | return rctx; | |
29f178bd | 418 | |
19f97fe6 | 419 | err: |
29f178bd DDO |
420 | OSSL_HTTP_REQ_CTX_free(rctx); |
421 | return NULL; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Parse first HTTP response line. This should be like this: "HTTP/1.0 200 OK". | |
e2b7dc35 DDO |
426 | * We need to obtain the status code and (optional) informational message. |
427 | * Return any received HTTP response status code, or 0 on fatal error. | |
29f178bd DDO |
428 | */ |
429 | ||
19f97fe6 | 430 | static int parse_http_line1(char *line, int *found_keep_alive) |
29f178bd | 431 | { |
e2b7dc35 | 432 | int i, retcode, err; |
29f178bd DDO |
433 | char *code, *reason, *end; |
434 | ||
2ff286c2 | 435 | if (!CHECK_AND_SKIP_PREFIX(line, HTTP_PREFIX_VERSION)) |
19f97fe6 DDO |
436 | goto err; |
437 | /* above HTTP 1.0, connection persistence is the default */ | |
2ff286c2 | 438 | *found_keep_alive = *line > '0'; |
19f97fe6 | 439 | |
29f178bd DDO |
440 | /* Skip to first whitespace (past protocol info) */ |
441 | for (code = line; *code != '\0' && !ossl_isspace(*code); code++) | |
442 | continue; | |
19f97fe6 DDO |
443 | if (*code == '\0') |
444 | goto err; | |
29f178bd DDO |
445 | |
446 | /* Skip past whitespace to start of response code */ | |
447 | while (*code != '\0' && ossl_isspace(*code)) | |
448 | code++; | |
19f97fe6 DDO |
449 | if (*code == '\0') |
450 | goto err; | |
29f178bd DDO |
451 | |
452 | /* Find end of response code: first whitespace after start of code */ | |
453 | for (reason = code; *reason != '\0' && !ossl_isspace(*reason); reason++) | |
454 | continue; | |
455 | ||
19f97fe6 DDO |
456 | if (*reason == '\0') |
457 | goto err; | |
29f178bd DDO |
458 | |
459 | /* Set end of response code and start of message */ | |
460 | *reason++ = '\0'; | |
461 | ||
462 | /* Attempt to parse numeric code */ | |
463 | retcode = strtoul(code, &end, 10); | |
29f178bd | 464 | if (*end != '\0') |
19f97fe6 | 465 | goto err; |
29f178bd DDO |
466 | |
467 | /* Skip over any leading whitespace in message */ | |
468 | while (*reason != '\0' && ossl_isspace(*reason)) | |
469 | reason++; | |
470 | ||
471 | if (*reason != '\0') { | |
472 | /* | |
473 | * Finally zap any trailing whitespace in message (include CRLF) | |
474 | */ | |
475 | ||
476 | /* chop any trailing whitespace from reason */ | |
477 | /* We know reason has a non-whitespace character so this is OK */ | |
478 | for (end = reason + strlen(reason) - 1; ossl_isspace(*end); end--) | |
479 | *end = '\0'; | |
480 | } | |
481 | ||
482 | switch (retcode) { | |
483 | case HTTP_STATUS_CODE_OK: | |
484 | case HTTP_STATUS_CODE_MOVED_PERMANENTLY: | |
485 | case HTTP_STATUS_CODE_FOUND: | |
486 | return retcode; | |
487 | default: | |
e2b7dc35 | 488 | err = HTTP_R_RECEIVED_ERROR; |
29f178bd | 489 | if (retcode < 400) |
e2b7dc35 | 490 | err = HTTP_R_STATUS_CODE_UNSUPPORTED; |
29f178bd | 491 | if (*reason == '\0') |
e2b7dc35 | 492 | ERR_raise_data(ERR_LIB_HTTP, err, "code=%s", code); |
29f178bd | 493 | else |
e2b7dc35 DDO |
494 | ERR_raise_data(ERR_LIB_HTTP, err, "code=%s, reason=%s", code, |
495 | reason); | |
496 | return retcode; | |
29f178bd | 497 | } |
19f97fe6 DDO |
498 | |
499 | err: | |
e2b7dc35 DDO |
500 | for (i = 0; i < 60 && line[i] != '\0'; i++) |
501 | if (!ossl_isprint(line[i])) | |
502 | line[i] = ' '; | |
be799eb7 DDO |
503 | line[i] = '\0'; |
504 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR, "content=%s", line); | |
19f97fe6 | 505 | return 0; |
29f178bd DDO |
506 | } |
507 | ||
be799eb7 | 508 | static int check_set_resp_len(OSSL_HTTP_REQ_CTX *rctx, size_t len) |
29f178bd | 509 | { |
e2f69d43 | 510 | if (rctx->max_resp_len != 0 && len > rctx->max_resp_len) { |
a150f8e1 | 511 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MAX_RESP_LEN_EXCEEDED, |
be799eb7 | 512 | "length=%zu, max=%zu", len, rctx->max_resp_len); |
e2f69d43 AF |
513 | return 0; |
514 | } | |
515 | if (rctx->resp_len != 0 && rctx->resp_len != len) { | |
a150f8e1 | 516 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_INCONSISTENT_CONTENT_LENGTH, |
be799eb7 | 517 | "ASN.1 length=%zu, Content-Length=%zu", |
d337af18 | 518 | len, rctx->resp_len); |
e2f69d43 AF |
519 | return 0; |
520 | } | |
29f178bd DDO |
521 | rctx->resp_len = len; |
522 | return 1; | |
523 | } | |
524 | ||
f0d5a3b6 DDO |
525 | static int may_still_retry(time_t max_time, int *ptimeout) |
526 | { | |
527 | time_t time_diff, now = time(NULL); | |
528 | ||
529 | if (max_time != 0) { | |
530 | if (max_time < now) { | |
531 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RETRY_TIMEOUT); | |
532 | return 0; | |
533 | } | |
534 | time_diff = max_time - now; | |
535 | *ptimeout = time_diff > INT_MAX ? INT_MAX : (int)time_diff; | |
536 | } | |
537 | return 1; | |
538 | } | |
539 | ||
29f178bd DDO |
540 | /* |
541 | * Try exchanging request and response via HTTP on (non-)blocking BIO in rctx. | |
542 | * Returns 1 on success, 0 on error or redirection, -1 on BIO_should_retry. | |
543 | */ | |
544 | int OSSL_HTTP_REQ_CTX_nbio(OSSL_HTTP_REQ_CTX *rctx) | |
545 | { | |
19f97fe6 | 546 | int i, found_expected_ct = 0, found_keep_alive = 0; |
35b76bc8 | 547 | int got_text = 1; |
673474b1 | 548 | long n; |
be799eb7 | 549 | size_t resp_len; |
29f178bd | 550 | const unsigned char *p; |
606c79e2 | 551 | char *buf, *key, *value, *line_end = NULL; |
7f8aba2f | 552 | size_t resp_hdr_lines = 0; |
29f178bd DDO |
553 | |
554 | if (rctx == NULL) { | |
9311d0c4 | 555 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
556 | return 0; |
557 | } | |
a6d40689 DDO |
558 | if (rctx->mem == NULL || rctx->wbio == NULL || rctx->rbio == NULL) { |
559 | ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
560 | return 0; | |
561 | } | |
29f178bd DDO |
562 | |
563 | rctx->redirection_url = NULL; | |
564 | next_io: | |
606c79e2 | 565 | buf = (char *)rctx->buf; |
29f178bd | 566 | if ((rctx->state & OHS_NOREAD) == 0) { |
606c79e2 | 567 | if (rctx->expect_asn1) { |
e2c38c1a | 568 | n = BIO_read(rctx->rbio, rctx->buf, rctx->buf_size); |
606c79e2 DDO |
569 | } else { |
570 | (void)ERR_set_mark(); | |
571 | n = BIO_gets(rctx->rbio, buf, rctx->buf_size); | |
572 | if (n == -2) { /* some BIOs, such as SSL, do not support "gets" */ | |
573 | (void)ERR_pop_to_mark(); | |
574 | n = BIO_get_line(rctx->rbio, buf, rctx->buf_size); | |
575 | } else { | |
576 | (void)ERR_clear_last_mark(); | |
577 | } | |
578 | } | |
29f178bd DDO |
579 | if (n <= 0) { |
580 | if (BIO_should_retry(rctx->rbio)) | |
581 | return -1; | |
a6d40689 | 582 | ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA); |
29f178bd DDO |
583 | return 0; |
584 | } | |
585 | ||
586 | /* Write data to memory BIO */ | |
e2c38c1a | 587 | if (BIO_write(rctx->mem, rctx->buf, n) != n) |
29f178bd DDO |
588 | return 0; |
589 | } | |
590 | ||
591 | switch (rctx->state) { | |
8b5ca511 | 592 | case OHS_ADD_HEADERS: |
29f178bd DDO |
593 | /* Last operation was adding headers: need a final \r\n */ |
594 | if (BIO_write(rctx->mem, "\r\n", 2) != 2) { | |
595 | rctx->state = OHS_ERROR; | |
596 | return 0; | |
597 | } | |
598 | rctx->state = OHS_WRITE_INIT; | |
599 | ||
c7340583 | 600 | /* fall through */ |
29f178bd | 601 | case OHS_WRITE_INIT: |
8b5ca511 | 602 | rctx->len_to_send = BIO_get_mem_data(rctx->mem, &rctx->pos); |
35b76bc8 | 603 | rctx->state = OHS_WRITE_HDR1; |
29f178bd | 604 | |
c7340583 | 605 | /* fall through */ |
35b76bc8 | 606 | case OHS_WRITE_HDR1: |
8b5ca511 DDO |
607 | case OHS_WRITE_HDR: |
608 | /* Copy some chunk of data from rctx->mem to rctx->wbio */ | |
609 | case OHS_WRITE_REQ: | |
610 | /* Copy some chunk of data from rctx->req to rctx->wbio */ | |
611 | ||
612 | if (rctx->len_to_send > 0) { | |
35b76bc8 | 613 | size_t sz; |
e8fdb060 | 614 | |
35b76bc8 | 615 | if (!BIO_write_ex(rctx->wbio, rctx->pos, rctx->len_to_send, &sz)) { |
8b5ca511 DDO |
616 | if (BIO_should_retry(rctx->wbio)) |
617 | return -1; | |
618 | rctx->state = OHS_ERROR; | |
619 | return 0; | |
620 | } | |
35b76bc8 DDO |
621 | if (OSSL_TRACE_ENABLED(HTTP) && rctx->state == OHS_WRITE_HDR1) |
622 | OSSL_TRACE(HTTP, "Sending request: [\n"); | |
623 | OSSL_TRACE_STRING(HTTP, rctx->state != OHS_WRITE_REQ || rctx->text, | |
624 | rctx->state != OHS_WRITE_REQ, rctx->pos, sz); | |
625 | if (rctx->state == OHS_WRITE_HDR1) | |
626 | rctx->state = OHS_WRITE_HDR; | |
627 | rctx->pos += sz; | |
628 | rctx->len_to_send -= sz; | |
8b5ca511 | 629 | goto next_io; |
29f178bd | 630 | } |
8b5ca511 DDO |
631 | if (rctx->state == OHS_WRITE_HDR) { |
632 | (void)BIO_reset(rctx->mem); | |
633 | rctx->state = OHS_WRITE_REQ; | |
634 | } | |
635 | if (rctx->req != NULL && !BIO_eof(rctx->req)) { | |
e2c38c1a | 636 | n = BIO_read(rctx->req, rctx->buf, rctx->buf_size); |
8b5ca511 | 637 | if (n <= 0) { |
059a4ad0 | 638 | if (BIO_should_retry(rctx->req)) |
8b5ca511 DDO |
639 | return -1; |
640 | ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA); | |
641 | return 0; | |
642 | } | |
e2c38c1a | 643 | rctx->pos = rctx->buf; |
8b5ca511 | 644 | rctx->len_to_send = n; |
29f178bd | 645 | goto next_io; |
8b5ca511 | 646 | } |
35b76bc8 DDO |
647 | if (OSSL_TRACE_ENABLED(HTTP)) |
648 | OSSL_TRACE(HTTP, "]\n"); | |
29f178bd DDO |
649 | rctx->state = OHS_FLUSH; |
650 | ||
c7340583 | 651 | /* fall through */ |
29f178bd DDO |
652 | case OHS_FLUSH: |
653 | ||
654 | i = BIO_flush(rctx->wbio); | |
655 | ||
656 | if (i > 0) { | |
657 | rctx->state = OHS_FIRSTLINE; | |
658 | goto next_io; | |
659 | } | |
660 | ||
661 | if (BIO_should_retry(rctx->wbio)) | |
662 | return -1; | |
663 | ||
664 | rctx->state = OHS_ERROR; | |
665 | return 0; | |
666 | ||
667 | case OHS_ERROR: | |
668 | return 0; | |
669 | ||
670 | case OHS_FIRSTLINE: | |
671 | case OHS_HEADERS: | |
672 | case OHS_REDIRECT: | |
673 | ||
674 | /* Attempt to read a line in */ | |
675 | next_line: | |
676 | /* | |
677 | * Due to strange memory BIO behavior with BIO_gets we have to check | |
678 | * there's a complete line in there before calling BIO_gets or we'll | |
679 | * just get a partial read. | |
680 | */ | |
681 | n = BIO_get_mem_data(rctx->mem, &p); | |
682 | if (n <= 0 || memchr(p, '\n', n) == 0) { | |
e2c38c1a | 683 | if (n >= rctx->buf_size) { |
29f178bd DDO |
684 | rctx->state = OHS_ERROR; |
685 | return 0; | |
686 | } | |
687 | goto next_io; | |
688 | } | |
606c79e2 | 689 | n = BIO_gets(rctx->mem, buf, rctx->buf_size); |
29f178bd DDO |
690 | |
691 | if (n <= 0) { | |
692 | if (BIO_should_retry(rctx->mem)) | |
693 | goto next_io; | |
694 | rctx->state = OHS_ERROR; | |
695 | return 0; | |
696 | } | |
697 | ||
7f8aba2f AN |
698 | resp_hdr_lines++; |
699 | if (rctx->max_hdr_lines != 0 && rctx->max_hdr_lines < resp_hdr_lines) { | |
700 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RESPONSE_TOO_MANY_HDRLINES); | |
701 | OSSL_TRACE(HTTP, "Received too many headers\n"); | |
702 | rctx->state = OHS_ERROR; | |
703 | return 0; | |
704 | } | |
705 | ||
29f178bd | 706 | /* Don't allow excessive lines */ |
e2c38c1a | 707 | if (n == rctx->buf_size) { |
9311d0c4 | 708 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RESPONSE_LINE_TOO_LONG); |
29f178bd DDO |
709 | rctx->state = OHS_ERROR; |
710 | return 0; | |
711 | } | |
712 | ||
e8fdb060 DDO |
713 | /* dump all response header lines */ |
714 | if (OSSL_TRACE_ENABLED(HTTP)) { | |
715 | if (rctx->state == OHS_FIRSTLINE) | |
35b76bc8 | 716 | OSSL_TRACE(HTTP, "Received response header: [\n"); |
e8fdb060 DDO |
717 | OSSL_TRACE1(HTTP, "%s", buf); |
718 | } | |
719 | ||
29f178bd DDO |
720 | /* First line */ |
721 | if (rctx->state == OHS_FIRSTLINE) { | |
606c79e2 | 722 | switch (parse_http_line1(buf, &found_keep_alive)) { |
29f178bd DDO |
723 | case HTTP_STATUS_CODE_OK: |
724 | rctx->state = OHS_HEADERS; | |
725 | goto next_line; | |
726 | case HTTP_STATUS_CODE_MOVED_PERMANENTLY: | |
727 | case HTTP_STATUS_CODE_FOUND: /* i.e., moved temporarily */ | |
046fba44 | 728 | if (!rctx->method_POST) { /* method is GET */ |
29f178bd DDO |
729 | rctx->state = OHS_REDIRECT; |
730 | goto next_line; | |
731 | } | |
9311d0c4 | 732 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED); |
29f178bd DDO |
733 | /* redirection is not supported/recommended for POST */ |
734 | /* fall through */ | |
735 | default: | |
35b76bc8 DDO |
736 | rctx->state = OHS_HEADERS_ERROR; |
737 | goto next_line; /* continue parsing and reporting header */ | |
29f178bd DDO |
738 | } |
739 | } | |
606c79e2 | 740 | key = buf; |
29f178bd DDO |
741 | value = strchr(key, ':'); |
742 | if (value != NULL) { | |
743 | *(value++) = '\0'; | |
744 | while (ossl_isspace(*value)) | |
745 | value++; | |
746 | line_end = strchr(value, '\r'); | |
747 | if (line_end == NULL) | |
748 | line_end = strchr(value, '\n'); | |
749 | if (line_end != NULL) | |
750 | *line_end = '\0'; | |
751 | } | |
752 | if (value != NULL && line_end != NULL) { | |
afe554c2 | 753 | if (rctx->state == OHS_REDIRECT |
fba140c7 | 754 | && OPENSSL_strcasecmp(key, "Location") == 0) { |
29f178bd DDO |
755 | rctx->redirection_url = value; |
756 | return 0; | |
757 | } | |
e8fdb060 | 758 | if (OPENSSL_strcasecmp(key, "Content-Type") == 0) { |
35b76bc8 | 759 | got_text = OPENSSL_strncasecmp(value, "text/", 5) == 0; |
e8fdb060 DDO |
760 | if (rctx->state == OHS_HEADERS |
761 | && rctx->expected_ct != NULL) { | |
52f61699 DDO |
762 | const char *semicolon; |
763 | ||
764 | if (OPENSSL_strcasecmp(rctx->expected_ct, value) != 0 | |
765 | /* ignore past ';' unless expected_ct contains ';' */ | |
766 | && (strchr(rctx->expected_ct, ';') != NULL | |
767 | || (semicolon = strchr(value, ';')) == NULL | |
768 | || (size_t)(semicolon - value) != strlen(rctx->expected_ct) | |
769 | || OPENSSL_strncasecmp(rctx->expected_ct, value, | |
770 | semicolon - value) != 0)) { | |
e8fdb060 DDO |
771 | ERR_raise_data(ERR_LIB_HTTP, |
772 | HTTP_R_UNEXPECTED_CONTENT_TYPE, | |
773 | "expected=%s, actual=%s", | |
774 | rctx->expected_ct, value); | |
775 | return 0; | |
776 | } | |
777 | found_expected_ct = 1; | |
29f178bd | 778 | } |
19f97fe6 DDO |
779 | } |
780 | ||
781 | /* https://tools.ietf.org/html/rfc7230#section-6.3 Persistence */ | |
fba140c7 DB |
782 | if (OPENSSL_strcasecmp(key, "Connection") == 0) { |
783 | if (OPENSSL_strcasecmp(value, "keep-alive") == 0) | |
19f97fe6 | 784 | found_keep_alive = 1; |
fba140c7 | 785 | else if (OPENSSL_strcasecmp(value, "close") == 0) |
19f97fe6 | 786 | found_keep_alive = 0; |
fba140c7 | 787 | } else if (OPENSSL_strcasecmp(key, "Content-Length") == 0) { |
be799eb7 | 788 | resp_len = (size_t)strtoul(value, &line_end, 10); |
29f178bd | 789 | if (line_end == value || *line_end != '\0') { |
a150f8e1 RL |
790 | ERR_raise_data(ERR_LIB_HTTP, |
791 | HTTP_R_ERROR_PARSING_CONTENT_LENGTH, | |
792 | "input=%s", value); | |
29f178bd DDO |
793 | return 0; |
794 | } | |
795 | if (!check_set_resp_len(rctx, resp_len)) | |
796 | return 0; | |
797 | } | |
798 | } | |
799 | ||
d337af18 | 800 | /* Look for blank line indicating end of headers */ |
e2c38c1a | 801 | for (p = rctx->buf; *p != '\0'; p++) { |
29f178bd DDO |
802 | if (*p != '\r' && *p != '\n') |
803 | break; | |
804 | } | |
805 | if (*p != '\0') /* not end of headers */ | |
806 | goto next_line; | |
35b76bc8 DDO |
807 | if (OSSL_TRACE_ENABLED(HTTP)) |
808 | OSSL_TRACE(HTTP, "]\n"); | |
29f178bd | 809 | |
7f8aba2f AN |
810 | resp_hdr_lines = 0; |
811 | ||
19f97fe6 DDO |
812 | if (rctx->keep_alive != 0 /* do not let server initiate keep_alive */ |
813 | && !found_keep_alive /* otherwise there is no change */) { | |
814 | if (rctx->keep_alive == 2) { | |
815 | rctx->keep_alive = 0; | |
816 | ERR_raise(ERR_LIB_HTTP, HTTP_R_SERVER_CANCELED_CONNECTION); | |
817 | return 0; | |
818 | } | |
819 | rctx->keep_alive = 0; | |
820 | } | |
821 | ||
35b76bc8 DDO |
822 | if (rctx->state == OHS_HEADERS_ERROR) { |
823 | if (OSSL_TRACE_ENABLED(HTTP)) { | |
824 | int printed_final_nl = 0; | |
825 | ||
826 | OSSL_TRACE(HTTP, "Received error response body: [\n"); | |
827 | while ((n = BIO_read(rctx->rbio, rctx->buf, rctx->buf_size)) > 0 | |
828 | || (OSSL_sleep(100), BIO_should_retry(rctx->rbio))) { | |
829 | OSSL_TRACE_STRING(HTTP, got_text, 1, rctx->buf, n); | |
830 | if (n > 0) | |
831 | printed_final_nl = rctx->buf[n - 1] == '\n'; | |
832 | } | |
833 | OSSL_TRACE1(HTTP, "%s]\n", printed_final_nl ? "" : "\n"); | |
834 | (void)printed_final_nl; /* avoid warning unless enable-trace */ | |
835 | } | |
38288f42 | 836 | return 0; |
e8fdb060 | 837 | } |
38288f42 DDO |
838 | |
839 | if (rctx->expected_ct != NULL && !found_expected_ct) { | |
840 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MISSING_CONTENT_TYPE, | |
841 | "expected=%s", rctx->expected_ct); | |
842 | return 0; | |
843 | } | |
29f178bd DDO |
844 | if (rctx->state == OHS_REDIRECT) { |
845 | /* http status code indicated redirect but there was no Location */ | |
9311d0c4 | 846 | ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_REDIRECT_LOCATION); |
29f178bd DDO |
847 | return 0; |
848 | } | |
849 | ||
850 | if (!rctx->expect_asn1) { | |
be799eb7 DDO |
851 | rctx->state = OHS_STREAM; |
852 | return 1; | |
29f178bd DDO |
853 | } |
854 | ||
855 | rctx->state = OHS_ASN1_HEADER; | |
856 | ||
857 | /* Fall thru */ | |
858 | case OHS_ASN1_HEADER: | |
859 | /* | |
860 | * Now reading ASN1 header: can read at least 2 bytes which is enough | |
861 | * for ASN1 SEQUENCE header and either length field or at least the | |
862 | * length of the length field. | |
863 | */ | |
864 | n = BIO_get_mem_data(rctx->mem, &p); | |
865 | if (n < 2) | |
866 | goto next_io; | |
867 | ||
868 | /* Check it is an ASN1 SEQUENCE */ | |
869 | if (*p++ != (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) { | |
9311d0c4 | 870 | ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_ASN1_ENCODING); |
29f178bd DDO |
871 | return 0; |
872 | } | |
873 | ||
874 | /* Check out length field */ | |
875 | if ((*p & 0x80) != 0) { | |
876 | /* | |
877 | * If MSB set on initial length octet we can now always read 6 | |
878 | * octets: make sure we have them. | |
879 | */ | |
880 | if (n < 6) | |
881 | goto next_io; | |
882 | n = *p & 0x7F; | |
883 | /* Not NDEF or excessive length */ | |
884 | if (n == 0 || (n > 4)) { | |
9311d0c4 | 885 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_PARSING_ASN1_LENGTH); |
29f178bd DDO |
886 | return 0; |
887 | } | |
888 | p++; | |
889 | resp_len = 0; | |
890 | for (i = 0; i < n; i++) { | |
891 | resp_len <<= 8; | |
892 | resp_len |= *p++; | |
893 | } | |
894 | resp_len += n + 2; | |
895 | } else { | |
896 | resp_len = *p + 2; | |
897 | } | |
898 | if (!check_set_resp_len(rctx, resp_len)) | |
899 | return 0; | |
900 | ||
be799eb7 | 901 | rctx->state = OHS_ASN1_CONTENT; |
29f178bd DDO |
902 | |
903 | /* Fall thru */ | |
be799eb7 | 904 | case OHS_ASN1_CONTENT: |
29f178bd DDO |
905 | default: |
906 | n = BIO_get_mem_data(rctx->mem, NULL); | |
be799eb7 | 907 | if (n < 0 || (size_t)n < rctx->resp_len) |
29f178bd DDO |
908 | goto next_io; |
909 | ||
be799eb7 | 910 | rctx->state = OHS_ASN1_DONE; |
29f178bd DDO |
911 | return 1; |
912 | } | |
913 | } | |
914 | ||
8f965908 DDO |
915 | int OSSL_HTTP_REQ_CTX_nbio_d2i(OSSL_HTTP_REQ_CTX *rctx, |
916 | ASN1_VALUE **pval, const ASN1_ITEM *it) | |
917 | { | |
918 | const unsigned char *p; | |
919 | int rv; | |
920 | ||
921 | *pval = NULL; | |
922 | if ((rv = OSSL_HTTP_REQ_CTX_nbio(rctx)) != 1) | |
923 | return rv; | |
924 | *pval = ASN1_item_d2i(NULL, &p, BIO_get_mem_data(rctx->mem, &p), it); | |
925 | return *pval != NULL; | |
926 | ||
927 | } | |
928 | ||
29f178bd DDO |
929 | #ifndef OPENSSL_NO_SOCK |
930 | ||
931 | /* set up a new connection BIO, to HTTP server or to HTTP(S) proxy if given */ | |
e2c38c1a | 932 | static BIO *http_new_bio(const char *server /* optionally includes ":port" */, |
afe554c2 | 933 | const char *server_port /* explicit server port */, |
79a2bccd DDO |
934 | int use_ssl, |
935 | const char *proxy /* optionally includes ":port" */, | |
936 | const char *proxy_port /* explicit proxy port */) | |
29f178bd | 937 | { |
79a2bccd | 938 | const char *host = server; |
29f178bd DDO |
939 | const char *port = server_port; |
940 | BIO *cbio; | |
941 | ||
4b1fe471 | 942 | if (!ossl_assert(server != NULL)) |
29f178bd | 943 | return NULL; |
29f178bd DDO |
944 | |
945 | if (proxy != NULL) { | |
946 | host = proxy; | |
79a2bccd | 947 | port = proxy_port; |
29f178bd | 948 | } |
afe554c2 | 949 | |
79a2bccd DDO |
950 | if (port == NULL && strchr(host, ':') == NULL) |
951 | port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT; | |
afe554c2 DDO |
952 | |
953 | cbio = BIO_new_connect(host /* optionally includes ":port" */); | |
29f178bd DDO |
954 | if (cbio == NULL) |
955 | goto end; | |
956 | if (port != NULL) | |
957 | (void)BIO_set_conn_port(cbio, port); | |
958 | ||
959 | end: | |
960 | return cbio; | |
961 | } | |
e8d0819d | 962 | #endif /* OPENSSL_NO_SOCK */ |
29f178bd | 963 | |
82990287 | 964 | /* Exchange request and response via HTTP on (non-)blocking BIO */ |
8f965908 | 965 | BIO *OSSL_HTTP_REQ_CTX_exchange(OSSL_HTTP_REQ_CTX *rctx) |
29f178bd | 966 | { |
29f178bd DDO |
967 | int rv; |
968 | ||
969 | if (rctx == NULL) { | |
9311d0c4 | 970 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
971 | return NULL; |
972 | } | |
973 | ||
974 | for (;;) { | |
975 | rv = OSSL_HTTP_REQ_CTX_nbio(rctx); | |
976 | if (rv != -1) | |
977 | break; | |
978 | /* BIO_should_retry was true */ | |
29f178bd | 979 | /* will not actually wait if rctx->max_time == 0 */ |
e8d0819d | 980 | if (BIO_wait(rctx->rbio, rctx->max_time, 100 /* milliseconds */) <= 0) |
29f178bd DDO |
981 | return NULL; |
982 | } | |
983 | ||
984 | if (rv == 0) { | |
985 | if (rctx->redirection_url == NULL) { /* an error occurred */ | |
1e6174b1 | 986 | if (rctx->len_to_send > 0) |
9311d0c4 | 987 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_SENDING); |
29f178bd | 988 | else |
9311d0c4 | 989 | ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_RECEIVING); |
29f178bd DDO |
990 | } |
991 | return NULL; | |
992 | } | |
be799eb7 | 993 | return rctx->state == OHS_STREAM ? rctx->rbio : rctx->mem; |
29f178bd DDO |
994 | } |
995 | ||
19f97fe6 | 996 | int OSSL_HTTP_is_alive(const OSSL_HTTP_REQ_CTX *rctx) |
29f178bd | 997 | { |
19f97fe6 | 998 | return rctx != NULL && rctx->keep_alive != 0; |
29f178bd DDO |
999 | } |
1000 | ||
19f97fe6 DDO |
1001 | /* High-level HTTP API implementation */ |
1002 | ||
1003 | /* Initiate an HTTP session using bio, else use given server, proxy, etc. */ | |
8f965908 DDO |
1004 | OSSL_HTTP_REQ_CTX *OSSL_HTTP_open(const char *server, const char *port, |
1005 | const char *proxy, const char *no_proxy, | |
1006 | int use_ssl, BIO *bio, BIO *rbio, | |
1007 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
be799eb7 | 1008 | int buf_size, int overall_timeout) |
8f965908 | 1009 | { |
19f97fe6 DDO |
1010 | BIO *cbio; /* == bio if supplied, used as connection BIO if rbio is NULL */ |
1011 | OSSL_HTTP_REQ_CTX *rctx = NULL; | |
29f178bd DDO |
1012 | |
1013 | if (use_ssl && bio_update_fn == NULL) { | |
9311d0c4 | 1014 | ERR_raise(ERR_LIB_HTTP, HTTP_R_TLS_NOT_ENABLED); |
29f178bd DDO |
1015 | return NULL; |
1016 | } | |
1017 | if (rbio != NULL && (bio == NULL || bio_update_fn != NULL)) { | |
9311d0c4 | 1018 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); |
29f178bd DDO |
1019 | return NULL; |
1020 | } | |
29f178bd | 1021 | |
4b1fe471 | 1022 | if (bio != NULL) { |
29f178bd | 1023 | cbio = bio; |
82990287 DDO |
1024 | if (proxy != NULL || no_proxy != NULL) { |
1025 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); | |
1026 | return NULL; | |
1027 | } | |
4b1fe471 | 1028 | } else { |
e8d0819d | 1029 | #ifndef OPENSSL_NO_SOCK |
79a2bccd DDO |
1030 | char *proxy_host = NULL, *proxy_port = NULL; |
1031 | ||
4b1fe471 | 1032 | if (server == NULL) { |
9311d0c4 | 1033 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
4b1fe471 DDO |
1034 | return NULL; |
1035 | } | |
19f97fe6 | 1036 | if (port != NULL && *port == '\0') |
4b1fe471 DDO |
1037 | port = NULL; |
1038 | if (port == NULL && strchr(server, ':') == NULL) | |
1039 | port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT; | |
ab9d67ef | 1040 | proxy = OSSL_HTTP_adapt_proxy(proxy, no_proxy, server, use_ssl); |
79a2bccd DDO |
1041 | if (proxy != NULL |
1042 | && !OSSL_HTTP_parse_url(proxy, NULL /* use_ssl */, NULL /* user */, | |
1043 | &proxy_host, &proxy_port, NULL /* num */, | |
1044 | NULL /* path */, NULL, NULL)) | |
1045 | return NULL; | |
e2c38c1a | 1046 | cbio = http_new_bio(server, port, use_ssl, proxy_host, proxy_port); |
79a2bccd DDO |
1047 | OPENSSL_free(proxy_host); |
1048 | OPENSSL_free(proxy_port); | |
1049 | if (cbio == NULL) | |
e8d0819d DDO |
1050 | return NULL; |
1051 | #else | |
9311d0c4 | 1052 | ERR_raise(ERR_LIB_HTTP, HTTP_R_SOCK_NOT_SUPPORTED); |
29f178bd | 1053 | return NULL; |
e8d0819d | 1054 | #endif |
4b1fe471 | 1055 | } |
29f178bd DDO |
1056 | |
1057 | (void)ERR_set_mark(); /* prepare removing any spurious libssl errors */ | |
19f97fe6 DDO |
1058 | if (rbio == NULL && BIO_do_connect_retry(cbio, overall_timeout, -1) <= 0) { |
1059 | if (bio == NULL) /* cbio was not provided by caller */ | |
1060 | BIO_free_all(cbio); | |
29f178bd | 1061 | goto end; |
19f97fe6 DDO |
1062 | } |
1063 | /* now overall_timeout is guaranteed to be >= 0 */ | |
29f178bd | 1064 | |
068549f8 | 1065 | /* adapt in order to fix callback design flaw, see #17088 */ |
29f178bd DDO |
1066 | /* callback can be used to wrap or prepend TLS session */ |
1067 | if (bio_update_fn != NULL) { | |
1068 | BIO *orig_bio = cbio; | |
19f97fe6 | 1069 | |
35750cb9 | 1070 | cbio = (*bio_update_fn)(cbio, arg, 1 /* connect */, use_ssl != 0); |
29f178bd | 1071 | if (cbio == NULL) { |
981a5b7c DDO |
1072 | if (bio == NULL) /* cbio was not provided by caller */ |
1073 | BIO_free_all(orig_bio); | |
29f178bd DDO |
1074 | goto end; |
1075 | } | |
1076 | } | |
1077 | ||
19f97fe6 DDO |
1078 | rctx = http_req_ctx_new(bio == NULL, cbio, rbio != NULL ? rbio : cbio, |
1079 | bio_update_fn, arg, use_ssl, proxy, server, port, | |
be799eb7 | 1080 | buf_size, overall_timeout); |
19f97fe6 DDO |
1081 | |
1082 | end: | |
1083 | if (rctx != NULL) | |
1084 | /* remove any spurious error queue entries by ssl_add_cert_chain() */ | |
1085 | (void)ERR_pop_to_mark(); | |
1086 | else | |
1087 | (void)ERR_clear_last_mark(); | |
1088 | ||
1089 | return rctx; | |
1090 | } | |
1091 | ||
8ccbf00d DDO |
1092 | int OSSL_HTTP_set1_request(OSSL_HTTP_REQ_CTX *rctx, const char *path, |
1093 | const STACK_OF(CONF_VALUE) *headers, | |
1094 | const char *content_type, BIO *req, | |
1095 | const char *expected_content_type, int expect_asn1, | |
1096 | size_t max_resp_len, int timeout, int keep_alive) | |
19f97fe6 DDO |
1097 | { |
1098 | int use_http_proxy; | |
1099 | ||
1100 | if (rctx == NULL) { | |
1101 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
1102 | return 0; | |
1103 | } | |
1104 | use_http_proxy = rctx->proxy != NULL && !rctx->use_ssl; | |
266383b4 | 1105 | if (use_http_proxy && rctx->server == NULL) { |
19f97fe6 DDO |
1106 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT); |
1107 | return 0; | |
1108 | } | |
be799eb7 | 1109 | rctx->max_resp_len = max_resp_len; /* allows for 0: indefinite */ |
19f97fe6 | 1110 | |
8b5ca511 | 1111 | return OSSL_HTTP_REQ_CTX_set_request_line(rctx, req != NULL, |
19f97fe6 DDO |
1112 | use_http_proxy ? rctx->server |
1113 | : NULL, rctx->port, path) | |
e2c38c1a | 1114 | && add1_headers(rctx, headers, rctx->server) |
19f97fe6 DDO |
1115 | && OSSL_HTTP_REQ_CTX_set_expected(rctx, expected_content_type, |
1116 | expect_asn1, timeout, keep_alive) | |
de5a0198 | 1117 | && set1_content(rctx, content_type, req); |
19f97fe6 DDO |
1118 | } |
1119 | ||
1120 | /*- | |
1121 | * Exchange single HTTP request and response according to rctx. | |
1122 | * If rctx->method_POST then use POST, else use GET and ignore content_type. | |
1123 | * The redirection_url output (freed by caller) parameter is used only for GET. | |
1124 | */ | |
1125 | BIO *OSSL_HTTP_exchange(OSSL_HTTP_REQ_CTX *rctx, char **redirection_url) | |
1126 | { | |
1127 | BIO *resp; | |
1128 | ||
1129 | if (rctx == NULL) { | |
1130 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); | |
1131 | return NULL; | |
1132 | } | |
1133 | ||
1134 | if (redirection_url != NULL) | |
1135 | *redirection_url = NULL; /* do this beforehand to prevent dbl free */ | |
29f178bd | 1136 | |
8f965908 | 1137 | resp = OSSL_HTTP_REQ_CTX_exchange(rctx); |
29f178bd DDO |
1138 | if (resp == NULL) { |
1139 | if (rctx->redirection_url != NULL) { | |
1140 | if (redirection_url == NULL) | |
9311d0c4 | 1141 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED); |
29f178bd DDO |
1142 | else |
1143 | /* may be NULL if out of memory: */ | |
1144 | *redirection_url = OPENSSL_strdup(rctx->redirection_url); | |
1145 | } else { | |
1146 | char buf[200]; | |
1147 | unsigned long err = ERR_peek_error(); | |
1148 | int lib = ERR_GET_LIB(err); | |
1149 | int reason = ERR_GET_REASON(err); | |
1150 | ||
1151 | if (lib == ERR_LIB_SSL || lib == ERR_LIB_HTTP | |
1152 | || (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_TIMEOUT) | |
1153 | || (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_ERROR) | |
4b1fe471 | 1154 | #ifndef OPENSSL_NO_CMP |
29f178bd | 1155 | || (lib == ERR_LIB_CMP |
100cc8b0 | 1156 | && reason == CMP_R_POTENTIALLY_INVALID_CERTIFICATE) |
4b1fe471 | 1157 | #endif |
100cc8b0 | 1158 | ) { |
19f97fe6 | 1159 | if (rctx->server != NULL) { |
22fe2b12 DDO |
1160 | BIO_snprintf(buf, sizeof(buf), "server=http%s://%s%s%s", |
1161 | rctx->use_ssl ? "s" : "", rctx->server, | |
1162 | rctx->port != NULL ? ":" : "", | |
1163 | rctx->port != NULL ? rctx->port : ""); | |
1164 | ERR_add_error_data(1, buf); | |
19f97fe6 | 1165 | } |
19f97fe6 DDO |
1166 | if (rctx->proxy != NULL) |
1167 | ERR_add_error_data(2, " proxy=", rctx->proxy); | |
29f178bd | 1168 | if (err == 0) { |
22fe2b12 | 1169 | BIO_snprintf(buf, sizeof(buf), " peer has disconnected%s", |
19f97fe6 | 1170 | rctx->use_ssl ? " violating the protocol" : |
29f178bd DDO |
1171 | ", likely because it requires the use of TLS"); |
1172 | ERR_add_error_data(1, buf); | |
1173 | } | |
1174 | } | |
1175 | } | |
1176 | } | |
6466cc97 DDO |
1177 | |
1178 | if (resp != NULL && !BIO_up_ref(resp)) | |
1179 | resp = NULL; | |
29f178bd DDO |
1180 | return resp; |
1181 | } | |
1182 | ||
1183 | static int redirection_ok(int n_redir, const char *old_url, const char *new_url) | |
1184 | { | |
29f178bd | 1185 | if (n_redir >= HTTP_VERSION_MAX_REDIRECTIONS) { |
9311d0c4 | 1186 | ERR_raise(ERR_LIB_HTTP, HTTP_R_TOO_MANY_REDIRECTIONS); |
29f178bd DDO |
1187 | return 0; |
1188 | } | |
1189 | if (*new_url == '/') /* redirection to same server => same protocol */ | |
1190 | return 1; | |
b6fec965 DDO |
1191 | if (HAS_PREFIX(old_url, OSSL_HTTPS_NAME":") && |
1192 | !HAS_PREFIX(new_url, OSSL_HTTPS_NAME":")) { | |
9311d0c4 | 1193 | ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_FROM_HTTPS_TO_HTTP); |
29f178bd DDO |
1194 | return 0; |
1195 | } | |
1196 | return 1; | |
1197 | } | |
1198 | ||
1199 | /* Get data via HTTP from server at given URL, potentially with redirection */ | |
afe554c2 | 1200 | BIO *OSSL_HTTP_get(const char *url, const char *proxy, const char *no_proxy, |
29f178bd DDO |
1201 | BIO *bio, BIO *rbio, |
1202 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
68bb06f7 | 1203 | int buf_size, const STACK_OF(CONF_VALUE) *headers, |
8f965908 | 1204 | const char *expected_ct, int expect_asn1, |
c4005c8b | 1205 | size_t max_resp_len, int timeout) |
29f178bd | 1206 | { |
c71b72ac | 1207 | char *current_url; |
29f178bd DDO |
1208 | int n_redirs = 0; |
1209 | char *host; | |
1210 | char *port; | |
1211 | char *path; | |
1212 | int use_ssl; | |
1213 | BIO *resp = NULL; | |
f0d5a3b6 | 1214 | time_t max_time = timeout > 0 ? time(NULL) + timeout : 0; |
29f178bd DDO |
1215 | |
1216 | if (url == NULL) { | |
9311d0c4 | 1217 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
1218 | return NULL; |
1219 | } | |
1220 | if ((current_url = OPENSSL_strdup(url)) == NULL) | |
1221 | return NULL; | |
1222 | ||
1223 | for (;;) { | |
c71b72ac TM |
1224 | OSSL_HTTP_REQ_CTX *rctx; |
1225 | char *redirection_url; | |
1226 | ||
7932982b DDO |
1227 | if (!OSSL_HTTP_parse_url(current_url, &use_ssl, NULL /* user */, &host, |
1228 | &port, NULL /* port_num */, &path, NULL, NULL)) | |
29f178bd DDO |
1229 | break; |
1230 | ||
19f97fe6 DDO |
1231 | rctx = OSSL_HTTP_open(host, port, proxy, no_proxy, |
1232 | use_ssl, bio, rbio, bio_update_fn, arg, | |
be799eb7 | 1233 | buf_size, timeout); |
8801240b | 1234 | new_rpath: |
c71b72ac | 1235 | redirection_url = NULL; |
19f97fe6 | 1236 | if (rctx != NULL) { |
8ccbf00d DDO |
1237 | if (!OSSL_HTTP_set1_request(rctx, path, headers, |
1238 | NULL /* content_type */, | |
1239 | NULL /* req */, | |
1240 | expected_ct, expect_asn1, max_resp_len, | |
1241 | -1 /* use same max time (timeout) */, | |
7fed5193 | 1242 | 0 /* no keep_alive */)) { |
19f97fe6 | 1243 | OSSL_HTTP_REQ_CTX_free(rctx); |
7fed5193 | 1244 | rctx = NULL; |
c71b72ac | 1245 | } else { |
19f97fe6 | 1246 | resp = OSSL_HTTP_exchange(rctx, &redirection_url); |
c71b72ac | 1247 | } |
19f97fe6 | 1248 | } |
29f178bd DDO |
1249 | OPENSSL_free(path); |
1250 | if (resp == NULL && redirection_url != NULL) { | |
f0d5a3b6 DDO |
1251 | if (redirection_ok(++n_redirs, current_url, redirection_url) |
1252 | && may_still_retry(max_time, &timeout)) { | |
29f178bd DDO |
1253 | (void)BIO_reset(bio); |
1254 | OPENSSL_free(current_url); | |
1255 | current_url = redirection_url; | |
1256 | if (*redirection_url == '/') { /* redirection to same server */ | |
1257 | path = OPENSSL_strdup(redirection_url); | |
816d6e57 JJ |
1258 | if (path == NULL) { |
1259 | OPENSSL_free(host); | |
1260 | OPENSSL_free(port); | |
1261 | (void)OSSL_HTTP_close(rctx, 1); | |
1262 | BIO_free(resp); | |
1263 | OPENSSL_free(current_url); | |
1264 | return NULL; | |
1265 | } | |
29f178bd DDO |
1266 | goto new_rpath; |
1267 | } | |
1268 | OPENSSL_free(host); | |
1269 | OPENSSL_free(port); | |
8801240b | 1270 | (void)OSSL_HTTP_close(rctx, 1); |
29f178bd DDO |
1271 | continue; |
1272 | } | |
8801240b | 1273 | /* if redirection not allowed, ignore it */ |
29f178bd DDO |
1274 | OPENSSL_free(redirection_url); |
1275 | } | |
1276 | OPENSSL_free(host); | |
1277 | OPENSSL_free(port); | |
8801240b DDO |
1278 | if (!OSSL_HTTP_close(rctx, resp != NULL)) { |
1279 | BIO_free(resp); | |
1280 | resp = NULL; | |
1281 | } | |
29f178bd DDO |
1282 | break; |
1283 | } | |
1284 | OPENSSL_free(current_url); | |
1285 | return resp; | |
1286 | } | |
1287 | ||
82990287 | 1288 | /* Exchange request and response over a connection managed via |prctx| */ |
19f97fe6 DDO |
1289 | BIO *OSSL_HTTP_transfer(OSSL_HTTP_REQ_CTX **prctx, |
1290 | const char *server, const char *port, | |
1291 | const char *path, int use_ssl, | |
1292 | const char *proxy, const char *no_proxy, | |
1293 | BIO *bio, BIO *rbio, | |
1294 | OSSL_HTTP_bio_cb_t bio_update_fn, void *arg, | |
1295 | int buf_size, const STACK_OF(CONF_VALUE) *headers, | |
1296 | const char *content_type, BIO *req, | |
1297 | const char *expected_ct, int expect_asn1, | |
be799eb7 | 1298 | size_t max_resp_len, int timeout, int keep_alive) |
19f97fe6 DDO |
1299 | { |
1300 | OSSL_HTTP_REQ_CTX *rctx = prctx == NULL ? NULL : *prctx; | |
1301 | BIO *resp = NULL; | |
1302 | ||
1303 | if (rctx == NULL) { | |
1304 | rctx = OSSL_HTTP_open(server, port, proxy, no_proxy, | |
1305 | use_ssl, bio, rbio, bio_update_fn, arg, | |
be799eb7 | 1306 | buf_size, timeout); |
19f97fe6 DDO |
1307 | timeout = -1; /* Already set during opening the connection */ |
1308 | } | |
1309 | if (rctx != NULL) { | |
8ccbf00d DDO |
1310 | if (OSSL_HTTP_set1_request(rctx, path, headers, content_type, req, |
1311 | expected_ct, expect_asn1, | |
1312 | max_resp_len, timeout, keep_alive)) | |
19f97fe6 DDO |
1313 | resp = OSSL_HTTP_exchange(rctx, NULL); |
1314 | if (resp == NULL || !OSSL_HTTP_is_alive(rctx)) { | |
82990287 DDO |
1315 | if (!OSSL_HTTP_close(rctx, resp != NULL)) { |
1316 | BIO_free(resp); | |
19f97fe6 | 1317 | resp = NULL; |
82990287 | 1318 | } |
19f97fe6 DDO |
1319 | rctx = NULL; |
1320 | } | |
1321 | } | |
1322 | if (prctx != NULL) | |
1323 | *prctx = rctx; | |
1324 | return resp; | |
1325 | } | |
1326 | ||
8f965908 | 1327 | int OSSL_HTTP_close(OSSL_HTTP_REQ_CTX *rctx, int ok) |
29f178bd | 1328 | { |
cdaf072f | 1329 | BIO *wbio; |
19f97fe6 DDO |
1330 | int ret = 1; |
1331 | ||
cdaf072f DDO |
1332 | /* callback can be used to finish TLS session and free its BIO */ |
1333 | if (rctx != NULL && rctx->upd_fn != NULL) { | |
1334 | wbio = (*rctx->upd_fn)(rctx->wbio, rctx->upd_arg, | |
1335 | 0 /* disconnect */, ok); | |
1336 | ret = wbio != NULL; | |
1337 | if (ret) | |
1338 | rctx->wbio = wbio; | |
1339 | } | |
19f97fe6 DDO |
1340 | OSSL_HTTP_REQ_CTX_free(rctx); |
1341 | return ret; | |
29f178bd DDO |
1342 | } |
1343 | ||
1344 | /* BASE64 encoder used for encoding basic proxy authentication credentials */ | |
1345 | static char *base64encode(const void *buf, size_t len) | |
1346 | { | |
1347 | int i; | |
1348 | size_t outl; | |
1349 | char *out; | |
1350 | ||
1351 | /* Calculate size of encoded data */ | |
1352 | outl = (len / 3); | |
1353 | if (len % 3 > 0) | |
1354 | outl++; | |
1355 | outl <<= 2; | |
1356 | out = OPENSSL_malloc(outl + 1); | |
1357 | if (out == NULL) | |
1358 | return 0; | |
1359 | ||
1360 | i = EVP_EncodeBlock((unsigned char *)out, buf, len); | |
1361 | if (!ossl_assert(0 <= i && (size_t)i <= outl)) { | |
1362 | OPENSSL_free(out); | |
1363 | return NULL; | |
1364 | } | |
1365 | return out; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Promote the given connection BIO using the CONNECT method for a TLS proxy. | |
1370 | * This is typically called by an app, so bio_err and prog are used unless NULL | |
1371 | * to print additional diagnostic information in a user-oriented way. | |
1372 | */ | |
1373 | int OSSL_HTTP_proxy_connect(BIO *bio, const char *server, const char *port, | |
1374 | const char *proxyuser, const char *proxypass, | |
1375 | int timeout, BIO *bio_err, const char *prog) | |
1376 | { | |
4b1fe471 DDO |
1377 | #undef BUF_SIZE |
1378 | #define BUF_SIZE (8 * 1024) | |
29f178bd DDO |
1379 | char *mbuf = OPENSSL_malloc(BUF_SIZE); |
1380 | char *mbufp; | |
1381 | int read_len = 0; | |
29f178bd DDO |
1382 | int ret = 0; |
1383 | BIO *fbio = BIO_new(BIO_f_buffer()); | |
e8d0819d | 1384 | int rv; |
29f178bd DDO |
1385 | time_t max_time = timeout > 0 ? time(NULL) + timeout : 0; |
1386 | ||
4b1fe471 | 1387 | if (bio == NULL || server == NULL |
29f178bd | 1388 | || (bio_err != NULL && prog == NULL)) { |
9311d0c4 | 1389 | ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER); |
29f178bd DDO |
1390 | goto end; |
1391 | } | |
4b1fe471 DDO |
1392 | if (port == NULL || *port == '\0') |
1393 | port = OSSL_HTTPS_PORT; | |
29f178bd DDO |
1394 | |
1395 | if (mbuf == NULL || fbio == NULL) { | |
1396 | BIO_printf(bio_err /* may be NULL */, "%s: out of memory", prog); | |
1397 | goto end; | |
1398 | } | |
1399 | BIO_push(fbio, bio); | |
1400 | ||
19f97fe6 | 1401 | BIO_printf(fbio, "CONNECT %s:%s "HTTP_1_0"\r\n", server, port); |
29f178bd DDO |
1402 | |
1403 | /* | |
1404 | * Workaround for broken proxies which would otherwise close | |
1405 | * the connection when entering tunnel mode (e.g., Squid 2.6) | |
1406 | */ | |
1407 | BIO_printf(fbio, "Proxy-Connection: Keep-Alive\r\n"); | |
1408 | ||
1409 | /* Support for basic (base64) proxy authentication */ | |
1410 | if (proxyuser != NULL) { | |
1411 | size_t len = strlen(proxyuser) + 1; | |
1412 | char *proxyauth, *proxyauthenc = NULL; | |
1413 | ||
1414 | if (proxypass != NULL) | |
1415 | len += strlen(proxypass); | |
1416 | proxyauth = OPENSSL_malloc(len + 1); | |
1417 | if (proxyauth == NULL) | |
1418 | goto end; | |
1419 | if (BIO_snprintf(proxyauth, len + 1, "%s:%s", proxyuser, | |
1420 | proxypass != NULL ? proxypass : "") != (int)len) | |
1421 | goto proxy_end; | |
1422 | proxyauthenc = base64encode(proxyauth, len); | |
1423 | if (proxyauthenc != NULL) { | |
1424 | BIO_printf(fbio, "Proxy-Authorization: Basic %s\r\n", proxyauthenc); | |
1425 | OPENSSL_clear_free(proxyauthenc, strlen(proxyauthenc)); | |
1426 | } | |
a6d40689 | 1427 | proxy_end: |
29f178bd DDO |
1428 | OPENSSL_clear_free(proxyauth, len); |
1429 | if (proxyauthenc == NULL) | |
1430 | goto end; | |
1431 | } | |
1432 | ||
1433 | /* Terminate the HTTP CONNECT request */ | |
1434 | BIO_printf(fbio, "\r\n"); | |
1435 | ||
1436 | for (;;) { | |
1437 | if (BIO_flush(fbio) != 0) | |
1438 | break; | |
1439 | /* potentially needs to be retried if BIO is non-blocking */ | |
1440 | if (!BIO_should_retry(fbio)) | |
1441 | break; | |
1442 | } | |
1443 | ||
1444 | for (;;) { | |
1445 | /* will not actually wait if timeout == 0 */ | |
e8d0819d | 1446 | rv = BIO_wait(fbio, max_time, 100 /* milliseconds */); |
29f178bd DDO |
1447 | if (rv <= 0) { |
1448 | BIO_printf(bio_err, "%s: HTTP CONNECT %s\n", prog, | |
1449 | rv == 0 ? "timed out" : "failed waiting for data"); | |
1450 | goto end; | |
1451 | } | |
1452 | ||
1453 | /*- | |
1454 | * The first line is the HTTP response. | |
1455 | * According to RFC 7230, it is formatted exactly like this: | |
552aeaef | 1456 | * HTTP/d.d ddd reason text\r\n |
29f178bd DDO |
1457 | */ |
1458 | read_len = BIO_gets(fbio, mbuf, BUF_SIZE); | |
1459 | /* the BIO may not block, so we must wait for the 1st line to come in */ | |
765860a3 | 1460 | if (read_len < (int)HTTP_LINE1_MINLEN) |
29f178bd DDO |
1461 | continue; |
1462 | ||
19f97fe6 | 1463 | /* Check for HTTP/1.x */ |
2ff286c2 | 1464 | mbufp = mbuf; |
2490d10d | 1465 | if (!CHECK_AND_SKIP_PREFIX(mbufp, HTTP_PREFIX)) { |
19f97fe6 | 1466 | ERR_raise(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR); |
29f178bd DDO |
1467 | BIO_printf(bio_err, "%s: HTTP CONNECT failed, non-HTTP response\n", |
1468 | prog); | |
1469 | /* Wrong protocol, not even HTTP, so stop reading headers */ | |
1470 | goto end; | |
1471 | } | |
2ff286c2 | 1472 | if (!HAS_PREFIX(mbufp, HTTP_VERSION_PATT)) { |
9311d0c4 | 1473 | ERR_raise(ERR_LIB_HTTP, HTTP_R_RECEIVED_WRONG_HTTP_VERSION); |
29f178bd DDO |
1474 | BIO_printf(bio_err, |
1475 | "%s: HTTP CONNECT failed, bad HTTP version %.*s\n", | |
19f97fe6 | 1476 | prog, (int)HTTP_VERSION_STR_LEN, mbufp); |
29f178bd DDO |
1477 | goto end; |
1478 | } | |
1479 | mbufp += HTTP_VERSION_STR_LEN; | |
19f97fe6 DDO |
1480 | |
1481 | /* RFC 7231 4.3.6: any 2xx status code is valid */ | |
b6fec965 | 1482 | if (!HAS_PREFIX(mbufp, " 2")) { |
2490d10d DDO |
1483 | if (ossl_isspace(*mbufp)) |
1484 | mbufp++; | |
29f178bd DDO |
1485 | /* chop any trailing whitespace */ |
1486 | while (read_len > 0 && ossl_isspace(mbuf[read_len - 1])) | |
1487 | read_len--; | |
1488 | mbuf[read_len] = '\0'; | |
a150f8e1 | 1489 | ERR_raise_data(ERR_LIB_HTTP, HTTP_R_CONNECT_FAILURE, |
552aeaef DDO |
1490 | "reason=%s", mbufp); |
1491 | BIO_printf(bio_err, "%s: HTTP CONNECT failed, reason=%s\n", | |
29f178bd DDO |
1492 | prog, mbufp); |
1493 | goto end; | |
1494 | } | |
1495 | ret = 1; | |
1496 | break; | |
1497 | } | |
1498 | ||
1499 | /* Read past all following headers */ | |
1500 | do { | |
1501 | /* | |
60e91cc4 | 1502 | * This does not necessarily catch the case when the full |
ad31628c | 1503 | * HTTP response came in more than a single TCP message. |
29f178bd DDO |
1504 | */ |
1505 | read_len = BIO_gets(fbio, mbuf, BUF_SIZE); | |
1506 | } while (read_len > 2); | |
1507 | ||
1508 | end: | |
1509 | if (fbio != NULL) { | |
1510 | (void)BIO_flush(fbio); | |
1511 | BIO_pop(fbio); | |
1512 | BIO_free(fbio); | |
1513 | } | |
1514 | OPENSSL_free(mbuf); | |
1515 | return ret; | |
4b1fe471 | 1516 | #undef BUF_SIZE |
29f178bd | 1517 | } |