]>
git.ipfire.org Git - thirdparty/openssl.git/blob - apps/lib/http_server.c
5c009b99902e9af9b37d974ef8e6d79f4ed0ea42
2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* Very basic HTTP server */
12 #if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
14 * On VMS, you need to define this to get the declaration of fileno(). The
15 * value 2 is to make sure no function defined in POSIX-2 is left undefined.
17 # define _POSIX_C_SOURCE 2
22 #include "http_server.h"
23 #include "internal/sockets.h"
24 #include <openssl/err.h>
25 #include <openssl/rand.h>
27 int multi
= 0; /* run multiple responder processes */
30 int acfd
= (int) INVALID_SOCKET
;
34 static int print_syslog(const char *str
, size_t len
, void *levPtr
)
36 int level
= *(int *)levPtr
;
37 int ilen
= len
> MAXERRLEN
? MAXERRLEN
: len
;
39 syslog(level
, "%.*s", ilen
, str
);
45 void log_message(const char *prog
, int level
, const char *fmt
, ...)
54 if (vsnprintf(buf
, sizeof(buf
), fmt
, ap
) > 0)
55 syslog(level
, "%s", buf
);
57 ERR_print_errors_cb(print_syslog
, &level
);
61 BIO_printf(bio_err
, "%s: ", prog
);
62 BIO_vprintf(bio_err
, fmt
, ap
);
63 BIO_printf(bio_err
, "\n");
69 void socket_timeout(int signum
)
71 if (acfd
!= (int)INVALID_SOCKET
)
72 (void)shutdown(acfd
, SHUT_RD
);
75 static void killall(int ret
, pid_t
*kidpids
)
79 for (i
= 0; i
< multi
; ++i
)
81 (void)kill(kidpids
[i
], SIGTERM
);
82 OPENSSL_free(kidpids
);
87 static int termsig
= 0;
89 static void noteterm(int sig
)
95 * Loop spawning up to `multi` child processes, only child processes return
96 * from this function. The parent process loops until receiving a termination
97 * signal, kills extant children and exits without returning.
99 void spawn_loop(const char *prog
)
101 pid_t
*kidpids
= NULL
;
106 openlog(prog
, LOG_PID
, LOG_DAEMON
);
109 syslog(LOG_ERR
, "fatal: error detaching from parent process group: %s",
113 kidpids
= app_malloc(multi
* sizeof(*kidpids
), "child PID array");
114 for (i
= 0; i
< multi
; ++i
)
117 signal(SIGINT
, noteterm
);
118 signal(SIGTERM
, noteterm
);
120 while (termsig
== 0) {
124 * Wait for a child to replace when we're at the limit.
125 * Slow down if a child exited abnormally or waitpid() < 0
127 while (termsig
== 0 && procs
>= multi
) {
128 if ((fpid
= waitpid(-1, &status
, 0)) > 0) {
129 for (i
= 0; i
< procs
; ++i
) {
130 if (kidpids
[i
] == fpid
) {
137 syslog(LOG_ERR
, "fatal: internal error: "
138 "no matching child slot for pid: %ld",
143 if (WIFEXITED(status
))
144 syslog(LOG_WARNING
, "child process: %ld, exit status: %d",
145 (long)fpid
, WEXITSTATUS(status
));
146 else if (WIFSIGNALED(status
))
147 syslog(LOG_WARNING
, "child process: %ld, term signal %d%s",
148 (long)fpid
, WTERMSIG(status
),
150 WCOREDUMP(status
) ? " (core dumped)" :
156 } else if (errno
!= EINTR
) {
157 syslog(LOG_ERR
, "fatal: waitpid(): %s", strerror(errno
));
164 switch (fpid
= fork()) {
166 /* System critically low on memory, pause and try again later */
170 OPENSSL_free(kidpids
);
171 signal(SIGINT
, SIG_DFL
);
172 signal(SIGTERM
, SIG_DFL
);
175 if (RAND_poll() <= 0) {
176 syslog(LOG_ERR
, "fatal: RAND_poll() failed");
180 default: /* parent */
181 for (i
= 0; i
< multi
; ++i
) {
182 if (kidpids
[i
] == 0) {
189 syslog(LOG_ERR
, "fatal: internal error: no free child slots");
196 /* The loop above can only break on termsig */
197 syslog(LOG_INFO
, "terminating on signal: %d", termsig
);
202 #ifndef OPENSSL_NO_SOCK
203 BIO
*http_server_init_bio(const char *prog
, const char *port
)
205 BIO
*acbio
= NULL
, *bufbio
;
207 bufbio
= BIO_new(BIO_f_buffer());
210 acbio
= BIO_new(BIO_s_accept());
212 || BIO_set_bind_mode(acbio
, BIO_BIND_REUSEADDR
) < 0
213 || BIO_set_accept_port(acbio
, port
) < 0) {
214 log_message(prog
, LOG_ERR
, "Error setting up accept BIO");
218 BIO_set_accept_bios(acbio
, bufbio
);
220 if (BIO_do_accept(acbio
) <= 0) {
221 log_message(prog
, LOG_ERR
, "Error starting accept");
234 * Decode %xx URL-decoding in-place. Ignores malformed sequences.
236 static int urldecode(char *p
)
238 unsigned char *out
= (unsigned char *)p
;
239 unsigned char *save
= out
;
244 } else if (isxdigit(_UC(p
[1])) && isxdigit(_UC(p
[2]))) {
245 /* Don't check, can't fail because of ixdigit() call. */
246 *out
++ = (OPENSSL_hexchar2int(p
[1]) << 4)
247 | OPENSSL_hexchar2int(p
[2]);
254 return (int)(out
- save
);
257 int http_server_get_asn1_req(const ASN1_ITEM
*it
, ASN1_VALUE
**preq
,
258 char **ppath
, BIO
**pcbio
, BIO
*acbio
,
259 const char *prog
, int accept_get
, int timeout
)
261 BIO
*cbio
= NULL
, *getbio
= NULL
, *b64
= NULL
;
263 char reqbuf
[2048], inbuf
[2048];
264 char *meth
, *url
, *end
;
273 /* Connection loss before accept() is routine, ignore silently */
274 if (BIO_do_accept(acbio
) <= 0)
277 cbio
= BIO_pop(acbio
);
280 /* Cannot call http_server_send_status(cbio, ...) */
287 (void)BIO_get_fd(cbio
, &acfd
);
292 /* Read the request line. */
293 len
= BIO_gets(cbio
, reqbuf
, sizeof(reqbuf
));
295 log_message(prog
, LOG_INFO
,
296 "Request line read error or empty request");
297 (void)http_server_send_status(cbio
, 400, "Bad Request");
303 if ((accept_get
&& strncmp(meth
, "GET ", 4) == 0)
304 || (url
++, strncmp(meth
, "POST ", 5) == 0)) {
305 /* Expecting (GET|POST) {sp} /URL {sp} HTTP/1.x */
310 log_message(prog
, LOG_INFO
,
311 "Invalid %s -- URL does not begin with '/': %s",
313 (void)http_server_send_status(cbio
, 400, "Bad Request");
318 /* Splice off the HTTP version identifier. */
319 for (end
= url
; *end
!= '\0'; end
++)
322 if (strncmp(end
, " HTTP/1.", 7) != 0) {
323 log_message(prog
, LOG_INFO
,
324 "Invalid %s -- bad HTTP/version string: %s",
326 (void)http_server_send_status(cbio
, 400, "Bad Request");
332 * Skip "GET / HTTP..." requests often used by load-balancers.
333 * 'url' was incremented above to point to the first byte *after*
334 * the leading slash, so in case 'GET / ' it is now an empty string.
336 if (strlen(meth
) == 3 && url
[0] == '\0') {
337 (void)http_server_send_status(cbio
, 200, "OK");
341 len
= urldecode(url
);
343 log_message(prog
, LOG_INFO
,
344 "Invalid %s request -- bad URL encoding: %s",
346 (void)http_server_send_status(cbio
, 400, "Bad Request");
349 if (strlen(meth
) == 3) { /* GET */
350 if ((getbio
= BIO_new_mem_buf(url
, len
)) == NULL
351 || (b64
= BIO_new(BIO_f_base64())) == NULL
) {
352 log_message(prog
, LOG_ERR
,
353 "Could not allocate base64 bio with size = %d",
357 BIO_set_flags(b64
, BIO_FLAGS_BASE64_NO_NL
);
358 getbio
= BIO_push(b64
, getbio
);
361 log_message(prog
, LOG_INFO
,
362 "HTTP request does not start with GET/POST: %s", reqbuf
);
363 /* TODO provide better diagnosis in case client tries TLS */
364 (void)http_server_send_status(cbio
, 400, "Bad Request");
368 /* chop any further/duplicate leading or trailing '/' */
371 while (end
>= url
+ 2 && end
[-2] == '/' && end
[-1] == '/')
375 /* Read and skip past the headers. */
377 len
= BIO_gets(cbio
, inbuf
, sizeof(inbuf
));
379 log_message(prog
, LOG_ERR
,
380 "Error skipping remaining HTTP headers");
381 (void)http_server_send_status(cbio
, 400, "Bad Request");
384 if ((inbuf
[0] == '\r') || (inbuf
[0] == '\n'))
389 /* Clear alarm before we close the client socket */
394 /* Try to read and parse request */
395 req
= ASN1_item_d2i_bio(it
, getbio
!= NULL
? getbio
: cbio
, NULL
);
397 log_message(prog
, LOG_ERR
, "Error parsing request");
398 } else if (ppath
!= NULL
&& (*ppath
= OPENSSL_strdup(url
)) == NULL
) {
399 log_message(prog
, LOG_ERR
,
400 "Out of memory allocating %zu bytes", strlen(url
) + 1);
401 ASN1_item_free(req
, it
);
408 BIO_free_all(getbio
);
412 acfd
= (int)INVALID_SOCKET
;
417 (void)http_server_send_status(cbio
, 500, "Internal Server Error");
419 OPENSSL_free(*ppath
);
428 /* assumes that cbio does not do an encoding that changes the output length */
429 int http_server_send_asn1_resp(BIO
*cbio
, const char *content_type
,
430 const ASN1_ITEM
*it
, const ASN1_VALUE
*resp
)
432 int ret
= BIO_printf(cbio
, "HTTP/1.0 200 OK\r\nContent-type: %s\r\n"
433 "Content-Length: %d\r\n\r\n", content_type
,
434 ASN1_item_i2d(resp
, NULL
, it
)) > 0
435 && ASN1_item_i2d_bio(it
, cbio
, resp
) > 0;
437 (void)BIO_flush(cbio
);
441 int http_server_send_status(BIO
*cbio
, int status
, const char *reason
)
443 int ret
= BIO_printf(cbio
, "HTTP/1.0 %d %s\r\n\r\n", status
, reason
) > 0;
445 (void)BIO_flush(cbio
);