2 * Copyright 2001-2023 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright Siemens AG 2018-2020
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
11 #include "internal/e_os.h"
14 #include "crypto/ctype.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>
23 #include <openssl/trace.h>
24 #include "internal/sockets.h"
25 #include "internal/common.h" /* for ossl_assert() */
27 #define HTTP_PREFIX "HTTP/"
28 #define HTTP_VERSION_PATT "1." /* allow 1.x */
29 #define HTTP_VERSION_STR_LEN sizeof(HTTP_VERSION_PATT) /* == strlen("1.0") */
30 #define HTTP_PREFIX_VERSION HTTP_PREFIX""HTTP_VERSION_PATT
31 #define HTTP_1_0 HTTP_PREFIX_VERSION"0" /* "HTTP/1.0" */
32 #define HTTP_LINE1_MINLEN (sizeof(HTTP_PREFIX_VERSION "x 200\n") - 1)
33 #define HTTP_VERSION_MAX_REDIRECTIONS 50
35 #define HTTP_STATUS_CODE_OK 200
36 #define HTTP_STATUS_CODE_MOVED_PERMANENTLY 301
37 #define HTTP_STATUS_CODE_FOUND 302
39 /* Stateful HTTP request code, supporting blocking and non-blocking I/O */
41 /* Opaque HTTP request status structure */
43 struct ossl_http_req_ctx_st
{
44 int state
; /* Current I/O state */
45 unsigned char *buf
; /* Buffer to write request or read response */
46 int buf_size
; /* Buffer size */
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 hostname */
55 char *port
; /* Optional server port */
56 BIO
*mem
; /* Mem BIO holding request header or response */
57 BIO
*req
; /* BIO holding the request provided by caller */
58 int method_POST
; /* HTTP method is POST (else GET) */
59 int text
; /* Request content type is (likely) text */
60 char *expected_ct
; /* Optional expected Content-Type */
61 int expect_asn1
; /* Response must be ASN.1-encoded */
62 unsigned char *pos
; /* Current position sending data */
63 long len_to_send
; /* Number of bytes still to send */
64 size_t resp_len
; /* Length of response */
65 size_t max_resp_len
; /* Maximum length of response, or 0 */
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 */
69 char *redirection_url
; /* Location obtained from HTTP status 301/302 */
70 size_t max_hdr_lines
; /* Max. number of http hdr lines, or 0 */
75 #define OHS_NOREAD 0x1000 /* If set no reading should be performed */
76 #define OHS_ERROR (0 | OHS_NOREAD) /* Error condition */
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 */
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 */
83 #define OHS_FIRSTLINE 1 /* First line of response being read */
84 #define OHS_HEADERS 2 /* MIME headers of response being read */
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 */
92 /* Low-level HTTP API implementation */
94 OSSL_HTTP_REQ_CTX
*OSSL_HTTP_REQ_CTX_new(BIO
*wbio
, BIO
*rbio
, int buf_size
)
96 OSSL_HTTP_REQ_CTX
*rctx
;
98 if (wbio
== NULL
|| rbio
== NULL
) {
99 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
103 if ((rctx
= OPENSSL_zalloc(sizeof(*rctx
))) == NULL
)
105 rctx
->state
= OHS_ERROR
;
106 rctx
->buf_size
= buf_size
> 0 ? buf_size
: OSSL_HTTP_DEFAULT_MAX_LINE_LEN
;
107 rctx
->buf
= OPENSSL_malloc(rctx
->buf_size
);
110 rctx
->max_hdr_lines
= OSSL_HTTP_DEFAULT_MAX_RESP_HDR_LINES
;
111 if (rctx
->buf
== NULL
) {
115 rctx
->max_resp_len
= OSSL_HTTP_DEFAULT_MAX_RESP_LEN
;
116 /* everything else is 0, e.g. rctx->len_to_send, or NULL, e.g. rctx->mem */
120 void OSSL_HTTP_REQ_CTX_free(OSSL_HTTP_REQ_CTX
*rctx
)
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.
130 BIO_free_all(rctx
->wbio
);
131 /* do not free rctx->rbio */
134 OPENSSL_free(rctx
->buf
);
135 OPENSSL_free(rctx
->proxy
);
136 OPENSSL_free(rctx
->server
);
137 OPENSSL_free(rctx
->port
);
138 OPENSSL_free(rctx
->expected_ct
);
142 BIO
*OSSL_HTTP_REQ_CTX_get0_mem_bio(const OSSL_HTTP_REQ_CTX
*rctx
)
145 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
151 size_t OSSL_HTTP_REQ_CTX_get_resp_len(const OSSL_HTTP_REQ_CTX
*rctx
)
154 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
157 return rctx
->resp_len
;
160 void OSSL_HTTP_REQ_CTX_set_max_response_length(OSSL_HTTP_REQ_CTX
*rctx
,
164 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
167 rctx
->max_resp_len
= len
!= 0 ? (size_t)len
: OSSL_HTTP_DEFAULT_MAX_RESP_LEN
;
171 * Create request line using |rctx| and |path| (or "/" in case |path| is NULL).
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://'.
175 int OSSL_HTTP_REQ_CTX_set_request_line(OSSL_HTTP_REQ_CTX
*rctx
, int method_POST
,
176 const char *server
, const char *port
,
180 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
184 if ((rctx
->mem
= BIO_new(BIO_s_mem())) == NULL
)
187 rctx
->method_POST
= method_POST
!= 0;
188 if (BIO_printf(rctx
->mem
, "%s ", rctx
->method_POST
? "POST" : "GET") <= 0)
191 if (server
!= NULL
) { /* HTTP (but not HTTPS) proxy is used */
193 * Section 5.1.2 of RFC 1945 states that the absoluteURI form is only
194 * allowed when using a proxy
196 if (BIO_printf(rctx
->mem
, OSSL_HTTP_PREFIX
"%s", server
) <= 0)
198 if (port
!= NULL
&& BIO_printf(rctx
->mem
, ":%s", port
) <= 0)
202 /* Make sure path includes a forward slash (abs_path) */
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
);
210 } else if (path
[0] != '/' && BIO_printf(rctx
->mem
, "/") <= 0) {
214 * Add (the rest of) the path and the HTTP version,
215 * which is fixed to 1.0 for straightforward implementation of keep-alive
217 if (BIO_printf(rctx
->mem
, "%s "HTTP_1_0
"\r\n", path
) <= 0)
221 rctx
->state
= OHS_ADD_HEADERS
;
225 int OSSL_HTTP_REQ_CTX_add1_header(OSSL_HTTP_REQ_CTX
*rctx
,
226 const char *name
, const char *value
)
228 if (rctx
== NULL
|| name
== NULL
) {
229 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
232 if (rctx
->mem
== NULL
) {
233 ERR_raise(ERR_LIB_HTTP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
237 if (BIO_puts(rctx
->mem
, name
) <= 0)
240 if (BIO_write(rctx
->mem
, ": ", 2) != 2)
242 if (BIO_puts(rctx
->mem
, value
) <= 0)
245 return BIO_write(rctx
->mem
, "\r\n", 2) == 2;
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
)
253 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
257 && rctx
->state
!= OHS_ERROR
&& rctx
->state
!= OHS_ADD_HEADERS
) {
258 /* Cannot anymore set keep-alive in request header */
259 ERR_raise(ERR_LIB_HTTP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
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
)
269 rctx
->expect_asn1
= asn1
;
271 rctx
->max_time
= timeout
> 0 ? time(NULL
) + timeout
: 0;
272 else /* take over any |overall_timeout| arg of OSSL_HTTP_open(), else 0 */
273 rctx
->max_time
= rctx
->max_total_time
;
274 rctx
->keep_alive
= keep_alive
;
278 static int set1_content(OSSL_HTTP_REQ_CTX
*rctx
,
279 const char *content_type
, BIO
*req
)
282 #ifndef OPENSSL_NO_STDIO
286 if (rctx
== NULL
|| (req
== NULL
&& content_type
!= NULL
)) {
287 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
291 if (rctx
->keep_alive
!= 0
292 && !OSSL_HTTP_REQ_CTX_add1_header(rctx
, "Connection", "keep-alive"))
299 if (!rctx
->method_POST
) {
300 ERR_raise(ERR_LIB_HTTP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
304 if (content_type
== NULL
) {
305 rctx
->text
= 1; /* assuming text by default, used just for tracing */
307 if (OPENSSL_strncasecmp(content_type
, "text/", 5) == 0)
309 if (BIO_printf(rctx
->mem
, "Content-Type: %s\r\n", content_type
) <= 0)
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.
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) {
321 (void)fseek(fp
, 0, SEEK_SET
);
327 req_len
= BIO_ctrl(req
, BIO_CTRL_INFO
, 0, NULL
);
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.
334 #ifndef OPENSSL_NO_STDIO
335 fp
!= NULL
/* definitely correct req_len */ ||
338 && BIO_printf(rctx
->mem
, "Content-Length: %ld\r\n", req_len
) < 0)
341 if (!BIO_up_ref(req
))
347 int OSSL_HTTP_REQ_CTX_set1_req(OSSL_HTTP_REQ_CTX
*rctx
, const char *content_type
,
348 const ASN1_ITEM
*it
, const ASN1_VALUE
*req
)
354 res
= (mem
= ASN1_item_i2d_mem_bio(it
, req
)) != NULL
;
355 res
= res
&& set1_content(rctx
, content_type
, mem
);
360 void OSSL_HTTP_REQ_CTX_set_max_response_hdr_lines(OSSL_HTTP_REQ_CTX
*rctx
,
364 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
367 rctx
->max_hdr_lines
= count
;
370 static int add1_headers(OSSL_HTTP_REQ_CTX
*rctx
,
371 const STACK_OF(CONF_VALUE
) *headers
, const char *host
)
374 int add_host
= host
!= NULL
&& *host
!= '\0';
377 for (i
= 0; i
< sk_CONF_VALUE_num(headers
); i
++) {
378 hdr
= sk_CONF_VALUE_value(headers
, i
);
379 if (add_host
&& OPENSSL_strcasecmp("host", hdr
->name
) == 0)
381 if (!OSSL_HTTP_REQ_CTX_add1_header(rctx
, hdr
->name
, hdr
->value
))
385 if (add_host
&& !OSSL_HTTP_REQ_CTX_add1_header(rctx
, "Host", host
))
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
,
395 const char *server
, const char *port
,
396 int buf_size
, int overall_timeout
)
398 OSSL_HTTP_REQ_CTX
*rctx
= OSSL_HTTP_REQ_CTX_new(wbio
, rbio
, buf_size
);
402 rctx
->free_wbio
= free_wbio
;
403 rctx
->upd_fn
= bio_update_fn
;
405 rctx
->use_ssl
= use_ssl
;
407 && (rctx
->proxy
= OPENSSL_strdup(proxy
)) == NULL
)
410 && (rctx
->server
= OPENSSL_strdup(server
)) == NULL
)
413 && (rctx
->port
= OPENSSL_strdup(port
)) == NULL
)
415 rctx
->max_total_time
=
416 overall_timeout
> 0 ? time(NULL
) + overall_timeout
: 0;
420 OSSL_HTTP_REQ_CTX_free(rctx
);
425 * Parse first HTTP response line. This should be like this: "HTTP/1.0 200 OK".
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.
430 static int parse_http_line1(char *line
, int *found_keep_alive
)
433 char *code
, *reason
, *end
;
435 if (!CHECK_AND_SKIP_PREFIX(line
, HTTP_PREFIX_VERSION
))
437 /* above HTTP 1.0, connection persistence is the default */
438 *found_keep_alive
= *line
> '0';
440 /* Skip to first whitespace (past protocol info) */
441 for (code
= line
; *code
!= '\0' && !ossl_isspace(*code
); code
++)
446 /* Skip past whitespace to start of response code */
447 while (*code
!= '\0' && ossl_isspace(*code
))
452 /* Find end of response code: first whitespace after start of code */
453 for (reason
= code
; *reason
!= '\0' && !ossl_isspace(*reason
); reason
++)
459 /* Set end of response code and start of message */
462 /* Attempt to parse numeric code */
463 retcode
= strtoul(code
, &end
, 10);
467 /* Skip over any leading whitespace in message */
468 while (*reason
!= '\0' && ossl_isspace(*reason
))
471 if (*reason
!= '\0') {
473 * Finally zap any trailing whitespace in message (include CRLF)
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
--)
483 case HTTP_STATUS_CODE_OK
:
484 case HTTP_STATUS_CODE_MOVED_PERMANENTLY
:
485 case HTTP_STATUS_CODE_FOUND
:
488 err
= HTTP_R_RECEIVED_ERROR
;
490 err
= HTTP_R_STATUS_CODE_UNSUPPORTED
;
492 ERR_raise_data(ERR_LIB_HTTP
, err
, "code=%s", code
);
494 ERR_raise_data(ERR_LIB_HTTP
, err
, "code=%s, reason=%s", code
,
500 for (i
= 0; i
< 60 && line
[i
] != '\0'; i
++)
501 if (!ossl_isprint(line
[i
]))
504 ERR_raise_data(ERR_LIB_HTTP
, HTTP_R_HEADER_PARSE_ERROR
, "content=%s", line
);
508 static int check_set_resp_len(OSSL_HTTP_REQ_CTX
*rctx
, size_t len
)
510 if (rctx
->max_resp_len
!= 0 && len
> rctx
->max_resp_len
) {
511 ERR_raise_data(ERR_LIB_HTTP
, HTTP_R_MAX_RESP_LEN_EXCEEDED
,
512 "length=%zu, max=%zu", len
, rctx
->max_resp_len
);
515 if (rctx
->resp_len
!= 0 && rctx
->resp_len
!= len
) {
516 ERR_raise_data(ERR_LIB_HTTP
, HTTP_R_INCONSISTENT_CONTENT_LENGTH
,
517 "ASN.1 length=%zu, Content-Length=%zu",
518 len
, rctx
->resp_len
);
521 rctx
->resp_len
= len
;
525 static int may_still_retry(time_t max_time
, int *ptimeout
)
527 time_t time_diff
, now
= time(NULL
);
530 if (max_time
< now
) {
531 ERR_raise(ERR_LIB_HTTP
, HTTP_R_RETRY_TIMEOUT
);
534 time_diff
= max_time
- now
;
535 *ptimeout
= time_diff
> INT_MAX
? INT_MAX
: (int)time_diff
;
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.
544 int OSSL_HTTP_REQ_CTX_nbio(OSSL_HTTP_REQ_CTX
*rctx
)
546 int i
, found_expected_ct
= 0, found_keep_alive
= 0;
550 const unsigned char *p
;
551 char *buf
, *key
, *value
, *line_end
= NULL
;
552 size_t resp_hdr_lines
= 0;
555 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
558 if (rctx
->mem
== NULL
|| rctx
->wbio
== NULL
|| rctx
->rbio
== NULL
) {
559 ERR_raise(ERR_LIB_HTTP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
563 rctx
->redirection_url
= NULL
;
565 buf
= (char *)rctx
->buf
;
566 if ((rctx
->state
& OHS_NOREAD
) == 0) {
567 if (rctx
->expect_asn1
) {
568 n
= BIO_read(rctx
->rbio
, rctx
->buf
, rctx
->buf_size
);
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
);
576 (void)ERR_clear_last_mark();
580 if (BIO_should_retry(rctx
->rbio
))
582 ERR_raise(ERR_LIB_HTTP
, HTTP_R_FAILED_READING_DATA
);
586 /* Write data to memory BIO */
587 if (BIO_write(rctx
->mem
, rctx
->buf
, n
) != n
)
591 switch (rctx
->state
) {
592 case OHS_ADD_HEADERS
:
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
;
598 rctx
->state
= OHS_WRITE_INIT
;
602 rctx
->len_to_send
= BIO_get_mem_data(rctx
->mem
, &rctx
->pos
);
603 rctx
->state
= OHS_WRITE_HDR1
;
608 /* Copy some chunk of data from rctx->mem to rctx->wbio */
610 /* Copy some chunk of data from rctx->req to rctx->wbio */
612 if (rctx
->len_to_send
> 0) {
615 if (!BIO_write_ex(rctx
->wbio
, rctx
->pos
, rctx
->len_to_send
, &sz
)) {
616 if (BIO_should_retry(rctx
->wbio
))
618 rctx
->state
= OHS_ERROR
;
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
;
628 rctx
->len_to_send
-= sz
;
631 if (rctx
->state
== OHS_WRITE_HDR
) {
632 (void)BIO_reset(rctx
->mem
);
633 rctx
->state
= OHS_WRITE_REQ
;
635 if (rctx
->req
!= NULL
&& !BIO_eof(rctx
->req
)) {
636 n
= BIO_read(rctx
->req
, rctx
->buf
, rctx
->buf_size
);
638 if (BIO_should_retry(rctx
->req
))
640 ERR_raise(ERR_LIB_HTTP
, HTTP_R_FAILED_READING_DATA
);
643 rctx
->pos
= rctx
->buf
;
644 rctx
->len_to_send
= n
;
647 if (OSSL_TRACE_ENABLED(HTTP
))
648 OSSL_TRACE(HTTP
, "]\n");
649 rctx
->state
= OHS_FLUSH
;
654 i
= BIO_flush(rctx
->wbio
);
657 rctx
->state
= OHS_FIRSTLINE
;
661 if (BIO_should_retry(rctx
->wbio
))
664 rctx
->state
= OHS_ERROR
;
674 /* Attempt to read a line in */
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.
681 n
= BIO_get_mem_data(rctx
->mem
, &p
);
682 if (n
<= 0 || memchr(p
, '\n', n
) == 0) {
683 if (n
>= rctx
->buf_size
) {
684 rctx
->state
= OHS_ERROR
;
689 n
= BIO_gets(rctx
->mem
, buf
, rctx
->buf_size
);
692 if (BIO_should_retry(rctx
->mem
))
694 rctx
->state
= OHS_ERROR
;
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
;
706 /* Don't allow excessive lines */
707 if (n
== rctx
->buf_size
) {
708 ERR_raise(ERR_LIB_HTTP
, HTTP_R_RESPONSE_LINE_TOO_LONG
);
709 rctx
->state
= OHS_ERROR
;
713 /* dump all response header lines */
714 if (OSSL_TRACE_ENABLED(HTTP
)) {
715 if (rctx
->state
== OHS_FIRSTLINE
)
716 OSSL_TRACE(HTTP
, "Received response header: [\n");
717 OSSL_TRACE1(HTTP
, "%s", buf
);
721 if (rctx
->state
== OHS_FIRSTLINE
) {
722 switch (parse_http_line1(buf
, &found_keep_alive
)) {
723 case HTTP_STATUS_CODE_OK
:
724 rctx
->state
= OHS_HEADERS
;
726 case HTTP_STATUS_CODE_MOVED_PERMANENTLY
:
727 case HTTP_STATUS_CODE_FOUND
: /* i.e., moved temporarily */
728 if (!rctx
->method_POST
) { /* method is GET */
729 rctx
->state
= OHS_REDIRECT
;
732 ERR_raise(ERR_LIB_HTTP
, HTTP_R_REDIRECTION_NOT_ENABLED
);
733 /* redirection is not supported/recommended for POST */
736 rctx
->state
= OHS_HEADERS_ERROR
;
737 goto next_line
; /* continue parsing and reporting header */
741 value
= strchr(key
, ':');
744 while (ossl_isspace(*value
))
746 line_end
= strchr(value
, '\r');
747 if (line_end
== NULL
)
748 line_end
= strchr(value
, '\n');
749 if (line_end
!= NULL
)
752 if (value
!= NULL
&& line_end
!= NULL
) {
753 if (rctx
->state
== OHS_REDIRECT
754 && OPENSSL_strcasecmp(key
, "Location") == 0) {
755 rctx
->redirection_url
= value
;
758 if (OPENSSL_strcasecmp(key
, "Content-Type") == 0) {
759 got_text
= OPENSSL_strncasecmp(value
, "text/", 5) == 0;
760 if (rctx
->state
== OHS_HEADERS
761 && rctx
->expected_ct
!= NULL
) {
762 const char *semicolon
;
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)) {
771 ERR_raise_data(ERR_LIB_HTTP
,
772 HTTP_R_UNEXPECTED_CONTENT_TYPE
,
773 "expected=%s, actual=%s",
774 rctx
->expected_ct
, value
);
777 found_expected_ct
= 1;
781 /* https://tools.ietf.org/html/rfc7230#section-6.3 Persistence */
782 if (OPENSSL_strcasecmp(key
, "Connection") == 0) {
783 if (OPENSSL_strcasecmp(value
, "keep-alive") == 0)
784 found_keep_alive
= 1;
785 else if (OPENSSL_strcasecmp(value
, "close") == 0)
786 found_keep_alive
= 0;
787 } else if (OPENSSL_strcasecmp(key
, "Content-Length") == 0) {
788 resp_len
= (size_t)strtoul(value
, &line_end
, 10);
789 if (line_end
== value
|| *line_end
!= '\0') {
790 ERR_raise_data(ERR_LIB_HTTP
,
791 HTTP_R_ERROR_PARSING_CONTENT_LENGTH
,
795 if (!check_set_resp_len(rctx
, resp_len
))
800 /* Look for blank line indicating end of headers */
801 for (p
= rctx
->buf
; *p
!= '\0'; p
++) {
802 if (*p
!= '\r' && *p
!= '\n')
805 if (*p
!= '\0') /* not end of headers */
807 if (OSSL_TRACE_ENABLED(HTTP
))
808 OSSL_TRACE(HTTP
, "]\n");
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
);
819 rctx
->keep_alive
= 0;
822 if (rctx
->state
== OHS_HEADERS_ERROR
) {
823 if (OSSL_TRACE_ENABLED(HTTP
)) {
824 int printed_final_nl
= 0;
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
);
831 printed_final_nl
= rctx
->buf
[n
- 1] == '\n';
833 OSSL_TRACE1(HTTP
, "%s]\n", printed_final_nl
? "" : "\n");
834 (void)printed_final_nl
; /* avoid warning unless enable-trace */
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
);
844 if (rctx
->state
== OHS_REDIRECT
) {
845 /* http status code indicated redirect but there was no Location */
846 ERR_raise(ERR_LIB_HTTP
, HTTP_R_MISSING_REDIRECT_LOCATION
);
850 if (!rctx
->expect_asn1
) {
851 rctx
->state
= OHS_STREAM
;
855 rctx
->state
= OHS_ASN1_HEADER
;
858 case OHS_ASN1_HEADER
:
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.
864 n
= BIO_get_mem_data(rctx
->mem
, &p
);
868 /* Check it is an ASN1 SEQUENCE */
869 if (*p
++ != (V_ASN1_SEQUENCE
| V_ASN1_CONSTRUCTED
)) {
870 ERR_raise(ERR_LIB_HTTP
, HTTP_R_MISSING_ASN1_ENCODING
);
874 /* Check out length field */
875 if ((*p
& 0x80) != 0) {
877 * If MSB set on initial length octet we can now always read 6
878 * octets: make sure we have them.
883 /* Not NDEF or excessive length */
884 if (n
== 0 || (n
> 4)) {
885 ERR_raise(ERR_LIB_HTTP
, HTTP_R_ERROR_PARSING_ASN1_LENGTH
);
890 for (i
= 0; i
< n
; i
++) {
898 if (!check_set_resp_len(rctx
, resp_len
))
901 rctx
->state
= OHS_ASN1_CONTENT
;
904 case OHS_ASN1_CONTENT
:
906 n
= BIO_get_mem_data(rctx
->mem
, NULL
);
907 if (n
< 0 || (size_t)n
< rctx
->resp_len
)
910 rctx
->state
= OHS_ASN1_DONE
;
915 int OSSL_HTTP_REQ_CTX_nbio_d2i(OSSL_HTTP_REQ_CTX
*rctx
,
916 ASN1_VALUE
**pval
, const ASN1_ITEM
*it
)
918 const unsigned char *p
;
922 if ((rv
= OSSL_HTTP_REQ_CTX_nbio(rctx
)) != 1)
924 *pval
= ASN1_item_d2i(NULL
, &p
, BIO_get_mem_data(rctx
->mem
, &p
), it
);
925 return *pval
!= NULL
;
929 #ifndef OPENSSL_NO_SOCK
931 /* set up a new connection BIO, to HTTP server or to HTTP(S) proxy if given */
932 static BIO
*http_new_bio(const char *server
/* optionally includes ":port" */,
933 const char *server_port
/* explicit server port */,
935 const char *proxy
/* optionally includes ":port" */,
936 const char *proxy_port
/* explicit proxy port */)
938 const char *host
= server
;
939 const char *port
= server_port
;
942 if (!ossl_assert(server
!= NULL
))
950 if (port
== NULL
&& strchr(host
, ':') == NULL
)
951 port
= use_ssl
? OSSL_HTTPS_PORT
: OSSL_HTTP_PORT
;
953 cbio
= BIO_new_connect(host
/* optionally includes ":port" */);
957 (void)BIO_set_conn_port(cbio
, port
);
962 #endif /* OPENSSL_NO_SOCK */
964 /* Exchange request and response via HTTP on (non-)blocking BIO */
965 BIO
*OSSL_HTTP_REQ_CTX_exchange(OSSL_HTTP_REQ_CTX
*rctx
)
970 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
975 rv
= OSSL_HTTP_REQ_CTX_nbio(rctx
);
978 /* BIO_should_retry was true */
979 /* will not actually wait if rctx->max_time == 0 */
980 if (BIO_wait(rctx
->rbio
, rctx
->max_time
, 100 /* milliseconds */) <= 0)
985 if (rctx
->redirection_url
== NULL
) { /* an error occurred */
986 if (rctx
->len_to_send
> 0)
987 ERR_raise(ERR_LIB_HTTP
, HTTP_R_ERROR_SENDING
);
989 ERR_raise(ERR_LIB_HTTP
, HTTP_R_ERROR_RECEIVING
);
993 return rctx
->state
== OHS_STREAM
? rctx
->rbio
: rctx
->mem
;
996 int OSSL_HTTP_is_alive(const OSSL_HTTP_REQ_CTX
*rctx
)
998 return rctx
!= NULL
&& rctx
->keep_alive
!= 0;
1001 /* High-level HTTP API implementation */
1003 /* Initiate an HTTP session using bio, else use given server, proxy, etc. */
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
,
1008 int buf_size
, int overall_timeout
)
1010 BIO
*cbio
; /* == bio if supplied, used as connection BIO if rbio is NULL */
1011 OSSL_HTTP_REQ_CTX
*rctx
= NULL
;
1013 if (use_ssl
&& bio_update_fn
== NULL
) {
1014 ERR_raise(ERR_LIB_HTTP
, HTTP_R_TLS_NOT_ENABLED
);
1017 if (rbio
!= NULL
&& (bio
== NULL
|| bio_update_fn
!= NULL
)) {
1018 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_INVALID_ARGUMENT
);
1024 if (proxy
!= NULL
|| no_proxy
!= NULL
) {
1025 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_INVALID_ARGUMENT
);
1029 #ifndef OPENSSL_NO_SOCK
1030 char *proxy_host
= NULL
, *proxy_port
= NULL
;
1032 if (server
== NULL
) {
1033 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
1036 if (port
!= NULL
&& *port
== '\0')
1038 if (port
== NULL
&& strchr(server
, ':') == NULL
)
1039 port
= use_ssl
? OSSL_HTTPS_PORT
: OSSL_HTTP_PORT
;
1040 proxy
= OSSL_HTTP_adapt_proxy(proxy
, no_proxy
, server
, use_ssl
);
1042 && !OSSL_HTTP_parse_url(proxy
, NULL
/* use_ssl */, NULL
/* user */,
1043 &proxy_host
, &proxy_port
, NULL
/* num */,
1044 NULL
/* path */, NULL
, NULL
))
1046 cbio
= http_new_bio(server
, port
, use_ssl
, proxy_host
, proxy_port
);
1047 OPENSSL_free(proxy_host
);
1048 OPENSSL_free(proxy_port
);
1052 ERR_raise(ERR_LIB_HTTP
, HTTP_R_SOCK_NOT_SUPPORTED
);
1057 (void)ERR_set_mark(); /* prepare removing any spurious libssl errors */
1058 if (rbio
== NULL
&& BIO_do_connect_retry(cbio
, overall_timeout
, -1) <= 0) {
1059 if (bio
== NULL
) /* cbio was not provided by caller */
1063 /* now overall_timeout is guaranteed to be >= 0 */
1065 /* adapt in order to fix callback design flaw, see #17088 */
1066 /* callback can be used to wrap or prepend TLS session */
1067 if (bio_update_fn
!= NULL
) {
1068 BIO
*orig_bio
= cbio
;
1070 cbio
= (*bio_update_fn
)(cbio
, arg
, 1 /* connect */, use_ssl
!= 0);
1072 if (bio
== NULL
) /* cbio was not provided by caller */
1073 BIO_free_all(orig_bio
);
1078 rctx
= http_req_ctx_new(bio
== NULL
, cbio
, rbio
!= NULL
? rbio
: cbio
,
1079 bio_update_fn
, arg
, use_ssl
, proxy
, server
, port
,
1080 buf_size
, overall_timeout
);
1084 /* remove any spurious error queue entries by ssl_add_cert_chain() */
1085 (void)ERR_pop_to_mark();
1087 (void)ERR_clear_last_mark();
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
)
1101 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
1104 use_http_proxy
= rctx
->proxy
!= NULL
&& !rctx
->use_ssl
;
1105 if (use_http_proxy
&& rctx
->server
== NULL
) {
1106 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_INVALID_ARGUMENT
);
1109 rctx
->max_resp_len
= max_resp_len
; /* allows for 0: indefinite */
1111 return OSSL_HTTP_REQ_CTX_set_request_line(rctx
, req
!= NULL
,
1112 use_http_proxy
? rctx
->server
1113 : NULL
, rctx
->port
, path
)
1114 && add1_headers(rctx
, headers
, rctx
->server
)
1115 && OSSL_HTTP_REQ_CTX_set_expected(rctx
, expected_content_type
,
1116 expect_asn1
, timeout
, keep_alive
)
1117 && set1_content(rctx
, content_type
, req
);
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.
1125 BIO
*OSSL_HTTP_exchange(OSSL_HTTP_REQ_CTX
*rctx
, char **redirection_url
)
1130 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
1134 if (redirection_url
!= NULL
)
1135 *redirection_url
= NULL
; /* do this beforehand to prevent dbl free */
1137 resp
= OSSL_HTTP_REQ_CTX_exchange(rctx
);
1139 if (rctx
->redirection_url
!= NULL
) {
1140 if (redirection_url
== NULL
)
1141 ERR_raise(ERR_LIB_HTTP
, HTTP_R_REDIRECTION_NOT_ENABLED
);
1143 /* may be NULL if out of memory: */
1144 *redirection_url
= OPENSSL_strdup(rctx
->redirection_url
);
1147 unsigned long err
= ERR_peek_error();
1148 int lib
= ERR_GET_LIB(err
);
1149 int reason
= ERR_GET_REASON(err
);
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
)
1154 #ifndef OPENSSL_NO_CMP
1155 || (lib
== ERR_LIB_CMP
1156 && reason
== CMP_R_POTENTIALLY_INVALID_CERTIFICATE
)
1159 if (rctx
->server
!= NULL
) {
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
);
1166 if (rctx
->proxy
!= NULL
)
1167 ERR_add_error_data(2, " proxy=", rctx
->proxy
);
1169 BIO_snprintf(buf
, sizeof(buf
), " peer has disconnected%s",
1170 rctx
->use_ssl
? " violating the protocol" :
1171 ", likely because it requires the use of TLS");
1172 ERR_add_error_data(1, buf
);
1178 if (resp
!= NULL
&& !BIO_up_ref(resp
))
1183 static int redirection_ok(int n_redir
, const char *old_url
, const char *new_url
)
1185 if (n_redir
>= HTTP_VERSION_MAX_REDIRECTIONS
) {
1186 ERR_raise(ERR_LIB_HTTP
, HTTP_R_TOO_MANY_REDIRECTIONS
);
1189 if (*new_url
== '/') /* redirection to same server => same protocol */
1191 if (HAS_PREFIX(old_url
, OSSL_HTTPS_NAME
":") &&
1192 !HAS_PREFIX(new_url
, OSSL_HTTPS_NAME
":")) {
1193 ERR_raise(ERR_LIB_HTTP
, HTTP_R_REDIRECTION_FROM_HTTPS_TO_HTTP
);
1199 /* Get data via HTTP from server at given URL, potentially with redirection */
1200 BIO
*OSSL_HTTP_get(const char *url
, const char *proxy
, const char *no_proxy
,
1201 BIO
*bio
, BIO
*rbio
,
1202 OSSL_HTTP_bio_cb_t bio_update_fn
, void *arg
,
1203 int buf_size
, const STACK_OF(CONF_VALUE
) *headers
,
1204 const char *expected_ct
, int expect_asn1
,
1205 size_t max_resp_len
, int timeout
)
1214 time_t max_time
= timeout
> 0 ? time(NULL
) + timeout
: 0;
1217 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
1220 if ((current_url
= OPENSSL_strdup(url
)) == NULL
)
1224 OSSL_HTTP_REQ_CTX
*rctx
;
1225 char *redirection_url
;
1227 if (!OSSL_HTTP_parse_url(current_url
, &use_ssl
, NULL
/* user */, &host
,
1228 &port
, NULL
/* port_num */, &path
, NULL
, NULL
))
1231 rctx
= OSSL_HTTP_open(host
, port
, proxy
, no_proxy
,
1232 use_ssl
, bio
, rbio
, bio_update_fn
, arg
,
1235 redirection_url
= NULL
;
1237 if (!OSSL_HTTP_set1_request(rctx
, path
, headers
,
1238 NULL
/* content_type */,
1240 expected_ct
, expect_asn1
, max_resp_len
,
1241 -1 /* use same max time (timeout) */,
1242 0 /* no keep_alive */)) {
1243 OSSL_HTTP_REQ_CTX_free(rctx
);
1246 resp
= OSSL_HTTP_exchange(rctx
, &redirection_url
);
1250 if (resp
== NULL
&& redirection_url
!= NULL
) {
1251 if (redirection_ok(++n_redirs
, current_url
, redirection_url
)
1252 && may_still_retry(max_time
, &timeout
)) {
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
);
1261 (void)OSSL_HTTP_close(rctx
, 1);
1263 OPENSSL_free(current_url
);
1270 (void)OSSL_HTTP_close(rctx
, 1);
1273 /* if redirection not allowed, ignore it */
1274 OPENSSL_free(redirection_url
);
1278 if (!OSSL_HTTP_close(rctx
, resp
!= NULL
)) {
1284 OPENSSL_free(current_url
);
1288 /* Exchange request and response over a connection managed via |prctx| */
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
,
1298 size_t max_resp_len
, int timeout
, int keep_alive
)
1300 OSSL_HTTP_REQ_CTX
*rctx
= prctx
== NULL
? NULL
: *prctx
;
1304 rctx
= OSSL_HTTP_open(server
, port
, proxy
, no_proxy
,
1305 use_ssl
, bio
, rbio
, bio_update_fn
, arg
,
1307 timeout
= -1; /* Already set during opening the connection */
1310 if (OSSL_HTTP_set1_request(rctx
, path
, headers
, content_type
, req
,
1311 expected_ct
, expect_asn1
,
1312 max_resp_len
, timeout
, keep_alive
))
1313 resp
= OSSL_HTTP_exchange(rctx
, NULL
);
1314 if (resp
== NULL
|| !OSSL_HTTP_is_alive(rctx
)) {
1315 if (!OSSL_HTTP_close(rctx
, resp
!= NULL
)) {
1327 int OSSL_HTTP_close(OSSL_HTTP_REQ_CTX
*rctx
, int ok
)
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
);
1340 OSSL_HTTP_REQ_CTX_free(rctx
);
1344 /* BASE64 encoder used for encoding basic proxy authentication credentials */
1345 static char *base64encode(const void *buf
, size_t len
)
1351 /* Calculate size of encoded data */
1356 out
= OPENSSL_malloc(outl
+ 1);
1360 i
= EVP_EncodeBlock((unsigned char *)out
, buf
, len
);
1361 if (!ossl_assert(0 <= i
&& (size_t)i
<= outl
)) {
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.
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
)
1378 #define BUF_SIZE (8 * 1024)
1379 char *mbuf
= OPENSSL_malloc(BUF_SIZE
);
1383 BIO
*fbio
= BIO_new(BIO_f_buffer());
1385 time_t max_time
= timeout
> 0 ? time(NULL
) + timeout
: 0;
1387 if (bio
== NULL
|| server
== NULL
1388 || (bio_err
!= NULL
&& prog
== NULL
)) {
1389 ERR_raise(ERR_LIB_HTTP
, ERR_R_PASSED_NULL_PARAMETER
);
1392 if (port
== NULL
|| *port
== '\0')
1393 port
= OSSL_HTTPS_PORT
;
1395 if (mbuf
== NULL
|| fbio
== NULL
) {
1396 BIO_printf(bio_err
/* may be NULL */, "%s: out of memory", prog
);
1399 BIO_push(fbio
, bio
);
1401 BIO_printf(fbio
, "CONNECT %s:%s "HTTP_1_0
"\r\n", server
, port
);
1404 * Workaround for broken proxies which would otherwise close
1405 * the connection when entering tunnel mode (e.g., Squid 2.6)
1407 BIO_printf(fbio
, "Proxy-Connection: Keep-Alive\r\n");
1409 /* Support for basic (base64) proxy authentication */
1410 if (proxyuser
!= NULL
) {
1411 size_t len
= strlen(proxyuser
) + 1;
1412 char *proxyauth
, *proxyauthenc
= NULL
;
1414 if (proxypass
!= NULL
)
1415 len
+= strlen(proxypass
);
1416 proxyauth
= OPENSSL_malloc(len
+ 1);
1417 if (proxyauth
== NULL
)
1419 if (BIO_snprintf(proxyauth
, len
+ 1, "%s:%s", proxyuser
,
1420 proxypass
!= NULL
? proxypass
: "") != (int)len
)
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
));
1428 OPENSSL_clear_free(proxyauth
, len
);
1429 if (proxyauthenc
== NULL
)
1433 /* Terminate the HTTP CONNECT request */
1434 BIO_printf(fbio
, "\r\n");
1437 if (BIO_flush(fbio
) != 0)
1439 /* potentially needs to be retried if BIO is non-blocking */
1440 if (!BIO_should_retry(fbio
))
1445 /* will not actually wait if timeout == 0 */
1446 rv
= BIO_wait(fbio
, max_time
, 100 /* milliseconds */);
1448 BIO_printf(bio_err
, "%s: HTTP CONNECT %s\n", prog
,
1449 rv
== 0 ? "timed out" : "failed waiting for data");
1454 * The first line is the HTTP response.
1455 * According to RFC 7230, it is formatted exactly like this:
1456 * HTTP/d.d ddd reason text\r\n
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 */
1460 if (read_len
< (int)HTTP_LINE1_MINLEN
)
1463 /* Check for HTTP/1.x */
1465 if (!CHECK_AND_SKIP_PREFIX(mbufp
, HTTP_PREFIX
)) {
1466 ERR_raise(ERR_LIB_HTTP
, HTTP_R_HEADER_PARSE_ERROR
);
1467 BIO_printf(bio_err
, "%s: HTTP CONNECT failed, non-HTTP response\n",
1469 /* Wrong protocol, not even HTTP, so stop reading headers */
1472 if (!HAS_PREFIX(mbufp
, HTTP_VERSION_PATT
)) {
1473 ERR_raise(ERR_LIB_HTTP
, HTTP_R_RECEIVED_WRONG_HTTP_VERSION
);
1475 "%s: HTTP CONNECT failed, bad HTTP version %.*s\n",
1476 prog
, (int)HTTP_VERSION_STR_LEN
, mbufp
);
1479 mbufp
+= HTTP_VERSION_STR_LEN
;
1481 /* RFC 7231 4.3.6: any 2xx status code is valid */
1482 if (!HAS_PREFIX(mbufp
, " 2")) {
1483 if (ossl_isspace(*mbufp
))
1485 /* chop any trailing whitespace */
1486 while (read_len
> 0 && ossl_isspace(mbuf
[read_len
- 1]))
1488 mbuf
[read_len
] = '\0';
1489 ERR_raise_data(ERR_LIB_HTTP
, HTTP_R_CONNECT_FAILURE
,
1490 "reason=%s", mbufp
);
1491 BIO_printf(bio_err
, "%s: HTTP CONNECT failed, reason=%s\n",
1499 /* Read past all following headers */
1502 * This does not necessarily catch the case when the full
1503 * HTTP response came in more than a single TCP message.
1505 read_len
= BIO_gets(fbio
, mbuf
, BUF_SIZE
);
1506 } while (read_len
> 2);
1510 (void)BIO_flush(fbio
);