1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 #ifdef HAVE_STRERROR_R
28 # if (!defined(HAVE_POSIX_STRERROR_R) && \
29 !defined(HAVE_GLIBC_STRERROR_R)) || \
30 (defined(HAVE_POSIX_STRERROR_R) && defined(HAVE_GLIBC_STRERROR_R))
31 # error "strerror_r MUST be either POSIX, glibc style"
32 # endif
33 #endif
34
35 #include <curl/curl.h>
36
37 #ifdef USE_LIBIDN2
38 #include <idn2.h>
39 #endif
40
41 #ifdef USE_WINDOWS_SSPI
42 #include "curl_sspi.h"
43 #endif
44
45 #include "strerror.h"
46 /* The last 3 #include files should be in this order */
47 #include "curl_printf.h"
48 #include "curl_memory.h"
49 #include "memdebug.h"
50
51 #if defined(_WIN32) || defined(_WIN32_WCE)
52 #define PRESERVE_WINDOWS_ERROR_CODE
53 #endif
54
55 const char *
curl_easy_strerror(CURLcode error)56 curl_easy_strerror(CURLcode error)
57 {
58 #ifndef CURL_DISABLE_VERBOSE_STRINGS
59 switch(error) {
60 case CURLE_OK:
61 return "No error";
62
63 case CURLE_UNSUPPORTED_PROTOCOL:
64 return "Unsupported protocol";
65
66 case CURLE_FAILED_INIT:
67 return "Failed initialization";
68
69 case CURLE_URL_MALFORMAT:
70 return "URL using bad/illegal format or missing URL";
71
72 case CURLE_NOT_BUILT_IN:
73 return "A requested feature, protocol or option was not found built-in in"
74 " this libcurl due to a build-time decision.";
75
76 case CURLE_COULDNT_RESOLVE_PROXY:
77 return "Could not resolve proxy name";
78
79 case CURLE_COULDNT_RESOLVE_HOST:
80 return "Could not resolve hostname";
81
82 case CURLE_COULDNT_CONNECT:
83 return "Could not connect to server";
84
85 case CURLE_WEIRD_SERVER_REPLY:
86 return "Weird server reply";
87
88 case CURLE_REMOTE_ACCESS_DENIED:
89 return "Access denied to remote resource";
90
91 case CURLE_FTP_ACCEPT_FAILED:
92 return "FTP: The server failed to connect to data port";
93
94 case CURLE_FTP_ACCEPT_TIMEOUT:
95 return "FTP: Accepting server connect has timed out";
96
97 case CURLE_FTP_PRET_FAILED:
98 return "FTP: The server did not accept the PRET command.";
99
100 case CURLE_FTP_WEIRD_PASS_REPLY:
101 return "FTP: unknown PASS reply";
102
103 case CURLE_FTP_WEIRD_PASV_REPLY:
104 return "FTP: unknown PASV reply";
105
106 case CURLE_FTP_WEIRD_227_FORMAT:
107 return "FTP: unknown 227 response format";
108
109 case CURLE_FTP_CANT_GET_HOST:
110 return "FTP: cannot figure out the host in the PASV response";
111
112 case CURLE_HTTP2:
113 return "Error in the HTTP2 framing layer";
114
115 case CURLE_FTP_COULDNT_SET_TYPE:
116 return "FTP: could not set file type";
117
118 case CURLE_PARTIAL_FILE:
119 return "Transferred a partial file";
120
121 case CURLE_FTP_COULDNT_RETR_FILE:
122 return "FTP: could not retrieve (RETR failed) the specified file";
123
124 case CURLE_QUOTE_ERROR:
125 return "Quote command returned error";
126
127 case CURLE_HTTP_RETURNED_ERROR:
128 return "HTTP response code said error";
129
130 case CURLE_WRITE_ERROR:
131 return "Failed writing received data to disk/application";
132
133 case CURLE_UPLOAD_FAILED:
134 return "Upload failed (at start/before it took off)";
135
136 case CURLE_READ_ERROR:
137 return "Failed to open/read local data from file/application";
138
139 case CURLE_OUT_OF_MEMORY:
140 return "Out of memory";
141
142 case CURLE_OPERATION_TIMEDOUT:
143 return "Timeout was reached";
144
145 case CURLE_FTP_PORT_FAILED:
146 return "FTP: command PORT failed";
147
148 case CURLE_FTP_COULDNT_USE_REST:
149 return "FTP: command REST failed";
150
151 case CURLE_RANGE_ERROR:
152 return "Requested range was not delivered by the server";
153
154 case CURLE_HTTP_POST_ERROR:
155 return "Internal problem setting up the POST";
156
157 case CURLE_SSL_CONNECT_ERROR:
158 return "SSL connect error";
159
160 case CURLE_BAD_DOWNLOAD_RESUME:
161 return "Could not resume download";
162
163 case CURLE_FILE_COULDNT_READ_FILE:
164 return "Could not read a file:// file";
165
166 case CURLE_LDAP_CANNOT_BIND:
167 return "LDAP: cannot bind";
168
169 case CURLE_LDAP_SEARCH_FAILED:
170 return "LDAP: search failed";
171
172 case CURLE_FUNCTION_NOT_FOUND:
173 return "A required function in the library was not found";
174
175 case CURLE_ABORTED_BY_CALLBACK:
176 return "Operation was aborted by an application callback";
177
178 case CURLE_BAD_FUNCTION_ARGUMENT:
179 return "A libcurl function was given a bad argument";
180
181 case CURLE_INTERFACE_FAILED:
182 return "Failed binding local connection end";
183
184 case CURLE_TOO_MANY_REDIRECTS:
185 return "Number of redirects hit maximum amount";
186
187 case CURLE_UNKNOWN_OPTION:
188 return "An unknown option was passed in to libcurl";
189
190 case CURLE_SETOPT_OPTION_SYNTAX:
191 return "Malformed option provided in a setopt";
192
193 case CURLE_GOT_NOTHING:
194 return "Server returned nothing (no headers, no data)";
195
196 case CURLE_SSL_ENGINE_NOTFOUND:
197 return "SSL crypto engine not found";
198
199 case CURLE_SSL_ENGINE_SETFAILED:
200 return "Can not set SSL crypto engine as default";
201
202 case CURLE_SSL_ENGINE_INITFAILED:
203 return "Failed to initialise SSL crypto engine";
204
205 case CURLE_SEND_ERROR:
206 return "Failed sending data to the peer";
207
208 case CURLE_RECV_ERROR:
209 return "Failure when receiving data from the peer";
210
211 case CURLE_SSL_CERTPROBLEM:
212 return "Problem with the local SSL certificate";
213
214 case CURLE_SSL_CIPHER:
215 return "Could not use specified SSL cipher";
216
217 case CURLE_PEER_FAILED_VERIFICATION:
218 return "SSL peer certificate or SSH remote key was not OK";
219
220 case CURLE_SSL_CACERT_BADFILE:
221 return "Problem with the SSL CA cert (path? access rights?)";
222
223 case CURLE_BAD_CONTENT_ENCODING:
224 return "Unrecognized or bad HTTP Content or Transfer-Encoding";
225
226 case CURLE_FILESIZE_EXCEEDED:
227 return "Maximum file size exceeded";
228
229 case CURLE_USE_SSL_FAILED:
230 return "Requested SSL level failed";
231
232 case CURLE_SSL_SHUTDOWN_FAILED:
233 return "Failed to shut down the SSL connection";
234
235 case CURLE_SSL_CRL_BADFILE:
236 return "Failed to load CRL file (path? access rights?, format?)";
237
238 case CURLE_SSL_ISSUER_ERROR:
239 return "Issuer check against peer certificate failed";
240
241 case CURLE_SEND_FAIL_REWIND:
242 return "Send failed since rewinding of the data stream failed";
243
244 case CURLE_LOGIN_DENIED:
245 return "Login denied";
246
247 case CURLE_TFTP_NOTFOUND:
248 return "TFTP: File Not Found";
249
250 case CURLE_TFTP_PERM:
251 return "TFTP: Access Violation";
252
253 case CURLE_REMOTE_DISK_FULL:
254 return "Disk full or allocation exceeded";
255
256 case CURLE_TFTP_ILLEGAL:
257 return "TFTP: Illegal operation";
258
259 case CURLE_TFTP_UNKNOWNID:
260 return "TFTP: Unknown transfer ID";
261
262 case CURLE_REMOTE_FILE_EXISTS:
263 return "Remote file already exists";
264
265 case CURLE_TFTP_NOSUCHUSER:
266 return "TFTP: No such user";
267
268 case CURLE_REMOTE_FILE_NOT_FOUND:
269 return "Remote file not found";
270
271 case CURLE_SSH:
272 return "Error in the SSH layer";
273
274 case CURLE_AGAIN:
275 return "Socket not ready for send/recv";
276
277 case CURLE_RTSP_CSEQ_ERROR:
278 return "RTSP CSeq mismatch or invalid CSeq";
279
280 case CURLE_RTSP_SESSION_ERROR:
281 return "RTSP session error";
282
283 case CURLE_FTP_BAD_FILE_LIST:
284 return "Unable to parse FTP file list";
285
286 case CURLE_CHUNK_FAILED:
287 return "Chunk callback failed";
288
289 case CURLE_NO_CONNECTION_AVAILABLE:
290 return "The max connection limit is reached";
291
292 case CURLE_SSL_PINNEDPUBKEYNOTMATCH:
293 return "SSL public key does not match pinned public key";
294
295 case CURLE_SSL_INVALIDCERTSTATUS:
296 return "SSL server certificate status verification FAILED";
297
298 case CURLE_HTTP2_STREAM:
299 return "Stream error in the HTTP/2 framing layer";
300
301 case CURLE_RECURSIVE_API_CALL:
302 return "API function called from within callback";
303
304 case CURLE_AUTH_ERROR:
305 return "An authentication function returned an error";
306
307 case CURLE_HTTP3:
308 return "HTTP/3 error";
309
310 case CURLE_QUIC_CONNECT_ERROR:
311 return "QUIC connection error";
312
313 case CURLE_PROXY:
314 return "proxy handshake error";
315
316 case CURLE_SSL_CLIENTCERT:
317 return "SSL Client Certificate required";
318
319 case CURLE_UNRECOVERABLE_POLL:
320 return "Unrecoverable error in select/poll";
321
322 case CURLE_TOO_LARGE:
323 return "A value or data field grew larger than allowed";
324
325 case CURLE_ECH_REQUIRED:
326 return "ECH attempted but failed";
327
328 /* error codes not used by current libcurl */
329 case CURLE_OBSOLETE20:
330 case CURLE_OBSOLETE24:
331 case CURLE_OBSOLETE29:
332 case CURLE_OBSOLETE32:
333 case CURLE_OBSOLETE40:
334 case CURLE_OBSOLETE44:
335 case CURLE_OBSOLETE46:
336 case CURLE_OBSOLETE50:
337 case CURLE_OBSOLETE51:
338 case CURLE_OBSOLETE57:
339 case CURLE_OBSOLETE62:
340 case CURLE_OBSOLETE75:
341 case CURLE_OBSOLETE76:
342 case CURL_LAST:
343 break;
344 }
345 /*
346 * By using a switch, gcc -Wall will complain about enum values
347 * which do not appear, helping keep this function up-to-date.
348 * By using gcc -Wall -Werror, you cannot forget.
349 *
350 * A table would not have the same benefit. Most compilers will generate
351 * code similar to a table in any case, so there is little performance gain
352 * from a table. Something is broken for the user's application, anyways, so
353 * does it matter how fast it _does not_ work?
354 *
355 * The line number for the error will be near this comment, which is why it
356 * is here, and not at the start of the switch.
357 */
358 return "Unknown error";
359 #else
360 if(!error)
361 return "No error";
362 else
363 return "Error";
364 #endif
365 }
366
367 const char *
curl_multi_strerror(CURLMcode error)368 curl_multi_strerror(CURLMcode error)
369 {
370 #ifndef CURL_DISABLE_VERBOSE_STRINGS
371 switch(error) {
372 case CURLM_CALL_MULTI_PERFORM:
373 return "Please call curl_multi_perform() soon";
374
375 case CURLM_OK:
376 return "No error";
377
378 case CURLM_BAD_HANDLE:
379 return "Invalid multi handle";
380
381 case CURLM_BAD_EASY_HANDLE:
382 return "Invalid easy handle";
383
384 case CURLM_OUT_OF_MEMORY:
385 return "Out of memory";
386
387 case CURLM_INTERNAL_ERROR:
388 return "Internal error";
389
390 case CURLM_BAD_SOCKET:
391 return "Invalid socket argument";
392
393 case CURLM_UNKNOWN_OPTION:
394 return "Unknown option";
395
396 case CURLM_ADDED_ALREADY:
397 return "The easy handle is already added to a multi handle";
398
399 case CURLM_RECURSIVE_API_CALL:
400 return "API function called from within callback";
401
402 case CURLM_WAKEUP_FAILURE:
403 return "Wakeup is unavailable or failed";
404
405 case CURLM_BAD_FUNCTION_ARGUMENT:
406 return "A libcurl function was given a bad argument";
407
408 case CURLM_ABORTED_BY_CALLBACK:
409 return "Operation was aborted by an application callback";
410
411 case CURLM_UNRECOVERABLE_POLL:
412 return "Unrecoverable error in select/poll";
413
414 case CURLM_LAST:
415 break;
416 }
417
418 return "Unknown error";
419 #else
420 if(error == CURLM_OK)
421 return "No error";
422 else
423 return "Error";
424 #endif
425 }
426
427 const char *
curl_share_strerror(CURLSHcode error)428 curl_share_strerror(CURLSHcode error)
429 {
430 #ifndef CURL_DISABLE_VERBOSE_STRINGS
431 switch(error) {
432 case CURLSHE_OK:
433 return "No error";
434
435 case CURLSHE_BAD_OPTION:
436 return "Unknown share option";
437
438 case CURLSHE_IN_USE:
439 return "Share currently in use";
440
441 case CURLSHE_INVALID:
442 return "Invalid share handle";
443
444 case CURLSHE_NOMEM:
445 return "Out of memory";
446
447 case CURLSHE_NOT_BUILT_IN:
448 return "Feature not enabled in this library";
449
450 case CURLSHE_LAST:
451 break;
452 }
453
454 return "CURLSHcode unknown";
455 #else
456 if(error == CURLSHE_OK)
457 return "No error";
458 else
459 return "Error";
460 #endif
461 }
462
463 const char *
curl_url_strerror(CURLUcode error)464 curl_url_strerror(CURLUcode error)
465 {
466 #ifndef CURL_DISABLE_VERBOSE_STRINGS
467 switch(error) {
468 case CURLUE_OK:
469 return "No error";
470
471 case CURLUE_BAD_HANDLE:
472 return "An invalid CURLU pointer was passed as argument";
473
474 case CURLUE_BAD_PARTPOINTER:
475 return "An invalid 'part' argument was passed as argument";
476
477 case CURLUE_MALFORMED_INPUT:
478 return "Malformed input to a URL function";
479
480 case CURLUE_BAD_PORT_NUMBER:
481 return "Port number was not a decimal number between 0 and 65535";
482
483 case CURLUE_UNSUPPORTED_SCHEME:
484 return "Unsupported URL scheme";
485
486 case CURLUE_URLDECODE:
487 return "URL decode error, most likely because of rubbish in the input";
488
489 case CURLUE_OUT_OF_MEMORY:
490 return "A memory function failed";
491
492 case CURLUE_USER_NOT_ALLOWED:
493 return "Credentials was passed in the URL when prohibited";
494
495 case CURLUE_UNKNOWN_PART:
496 return "An unknown part ID was passed to a URL API function";
497
498 case CURLUE_NO_SCHEME:
499 return "No scheme part in the URL";
500
501 case CURLUE_NO_USER:
502 return "No user part in the URL";
503
504 case CURLUE_NO_PASSWORD:
505 return "No password part in the URL";
506
507 case CURLUE_NO_OPTIONS:
508 return "No options part in the URL";
509
510 case CURLUE_NO_HOST:
511 return "No host part in the URL";
512
513 case CURLUE_NO_PORT:
514 return "No port part in the URL";
515
516 case CURLUE_NO_QUERY:
517 return "No query part in the URL";
518
519 case CURLUE_NO_FRAGMENT:
520 return "No fragment part in the URL";
521
522 case CURLUE_NO_ZONEID:
523 return "No zoneid part in the URL";
524
525 case CURLUE_BAD_LOGIN:
526 return "Bad login part";
527
528 case CURLUE_BAD_IPV6:
529 return "Bad IPv6 address";
530
531 case CURLUE_BAD_HOSTNAME:
532 return "Bad hostname";
533
534 case CURLUE_BAD_FILE_URL:
535 return "Bad file:// URL";
536
537 case CURLUE_BAD_SLASHES:
538 return "Unsupported number of slashes following scheme";
539
540 case CURLUE_BAD_SCHEME:
541 return "Bad scheme";
542
543 case CURLUE_BAD_PATH:
544 return "Bad path";
545
546 case CURLUE_BAD_FRAGMENT:
547 return "Bad fragment";
548
549 case CURLUE_BAD_QUERY:
550 return "Bad query";
551
552 case CURLUE_BAD_PASSWORD:
553 return "Bad password";
554
555 case CURLUE_BAD_USER:
556 return "Bad user";
557
558 case CURLUE_LACKS_IDN:
559 return "libcurl lacks IDN support";
560
561 case CURLUE_TOO_LARGE:
562 return "A value or data field is larger than allowed";
563
564 case CURLUE_LAST:
565 break;
566 }
567
568 return "CURLUcode unknown";
569 #else
570 if(error == CURLUE_OK)
571 return "No error";
572 else
573 return "Error";
574 #endif
575 }
576
577 #ifdef USE_WINSOCK
578 /* This is a helper function for Curl_strerror that converts Winsock error
579 * codes (WSAGetLastError) to error messages.
580 * Returns NULL if no error message was found for error code.
581 */
582 static const char *
get_winsock_error(int err,char * buf,size_t len)583 get_winsock_error(int err, char *buf, size_t len)
584 {
585 #ifndef CURL_DISABLE_VERBOSE_STRINGS
586 const char *p;
587 size_t alen;
588 #endif
589
590 if(!len)
591 return NULL;
592
593 *buf = '\0';
594
595 #ifdef CURL_DISABLE_VERBOSE_STRINGS
596 (void)err;
597 return NULL;
598 #else
599 switch(err) {
600 case WSAEINTR:
601 p = "Call interrupted";
602 break;
603 case WSAEBADF:
604 p = "Bad file";
605 break;
606 case WSAEACCES:
607 p = "Bad access";
608 break;
609 case WSAEFAULT:
610 p = "Bad argument";
611 break;
612 case WSAEINVAL:
613 p = "Invalid arguments";
614 break;
615 case WSAEMFILE:
616 p = "Out of file descriptors";
617 break;
618 case WSAEWOULDBLOCK:
619 p = "Call would block";
620 break;
621 case WSAEINPROGRESS:
622 case WSAEALREADY:
623 p = "Blocking call in progress";
624 break;
625 case WSAENOTSOCK:
626 p = "Descriptor is not a socket";
627 break;
628 case WSAEDESTADDRREQ:
629 p = "Need destination address";
630 break;
631 case WSAEMSGSIZE:
632 p = "Bad message size";
633 break;
634 case WSAEPROTOTYPE:
635 p = "Bad protocol";
636 break;
637 case WSAENOPROTOOPT:
638 p = "Protocol option is unsupported";
639 break;
640 case WSAEPROTONOSUPPORT:
641 p = "Protocol is unsupported";
642 break;
643 case WSAESOCKTNOSUPPORT:
644 p = "Socket is unsupported";
645 break;
646 case WSAEOPNOTSUPP:
647 p = "Operation not supported";
648 break;
649 case WSAEAFNOSUPPORT:
650 p = "Address family not supported";
651 break;
652 case WSAEPFNOSUPPORT:
653 p = "Protocol family not supported";
654 break;
655 case WSAEADDRINUSE:
656 p = "Address already in use";
657 break;
658 case WSAEADDRNOTAVAIL:
659 p = "Address not available";
660 break;
661 case WSAENETDOWN:
662 p = "Network down";
663 break;
664 case WSAENETUNREACH:
665 p = "Network unreachable";
666 break;
667 case WSAENETRESET:
668 p = "Network has been reset";
669 break;
670 case WSAECONNABORTED:
671 p = "Connection was aborted";
672 break;
673 case WSAECONNRESET:
674 p = "Connection was reset";
675 break;
676 case WSAENOBUFS:
677 p = "No buffer space";
678 break;
679 case WSAEISCONN:
680 p = "Socket is already connected";
681 break;
682 case WSAENOTCONN:
683 p = "Socket is not connected";
684 break;
685 case WSAESHUTDOWN:
686 p = "Socket has been shut down";
687 break;
688 case WSAETOOMANYREFS:
689 p = "Too many references";
690 break;
691 case WSAETIMEDOUT:
692 p = "Timed out";
693 break;
694 case WSAECONNREFUSED:
695 p = "Connection refused";
696 break;
697 case WSAELOOP:
698 p = "Loop??";
699 break;
700 case WSAENAMETOOLONG:
701 p = "Name too long";
702 break;
703 case WSAEHOSTDOWN:
704 p = "Host down";
705 break;
706 case WSAEHOSTUNREACH:
707 p = "Host unreachable";
708 break;
709 case WSAENOTEMPTY:
710 p = "Not empty";
711 break;
712 case WSAEPROCLIM:
713 p = "Process limit reached";
714 break;
715 case WSAEUSERS:
716 p = "Too many users";
717 break;
718 case WSAEDQUOT:
719 p = "Bad quota";
720 break;
721 case WSAESTALE:
722 p = "Something is stale";
723 break;
724 case WSAEREMOTE:
725 p = "Remote error";
726 break;
727 #ifdef WSAEDISCON /* missing in SalfordC! */
728 case WSAEDISCON:
729 p = "Disconnected";
730 break;
731 #endif
732 /* Extended Winsock errors */
733 case WSASYSNOTREADY:
734 p = "Winsock library is not ready";
735 break;
736 case WSANOTINITIALISED:
737 p = "Winsock library not initialised";
738 break;
739 case WSAVERNOTSUPPORTED:
740 p = "Winsock version not supported";
741 break;
742
743 /* getXbyY() errors (already handled in herrmsg):
744 * Authoritative Answer: Host not found */
745 case WSAHOST_NOT_FOUND:
746 p = "Host not found";
747 break;
748
749 /* Non-Authoritative: Host not found, or SERVERFAIL */
750 case WSATRY_AGAIN:
751 p = "Host not found, try again";
752 break;
753
754 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
755 case WSANO_RECOVERY:
756 p = "Unrecoverable error in call to nameserver";
757 break;
758
759 /* Valid name, no data record of requested type */
760 case WSANO_DATA:
761 p = "No data record of requested type";
762 break;
763
764 default:
765 return NULL;
766 }
767 alen = strlen(p);
768 if(alen < len)
769 strcpy(buf, p);
770 return buf;
771 #endif
772 }
773 #endif /* USE_WINSOCK */
774
775 #if defined(_WIN32) || defined(_WIN32_WCE)
776 /* This is a helper function for Curl_strerror that converts Windows API error
777 * codes (GetLastError) to error messages.
778 * Returns NULL if no error message was found for error code.
779 */
780 static const char *
get_winapi_error(int err,char * buf,size_t buflen)781 get_winapi_error(int err, char *buf, size_t buflen)
782 {
783 char *p;
784 wchar_t wbuf[256];
785
786 if(!buflen)
787 return NULL;
788
789 *buf = '\0';
790 *wbuf = L'\0';
791
792 /* We return the local codepage version of the error string because if it is
793 output to the user's terminal it will likely be with functions which
794 expect the local codepage (eg fprintf, failf, infof).
795 FormatMessageW -> wcstombs is used for Windows CE compatibility. */
796 if(FormatMessageW((FORMAT_MESSAGE_FROM_SYSTEM |
797 FORMAT_MESSAGE_IGNORE_INSERTS), NULL, (DWORD)err,
798 LANG_NEUTRAL, wbuf, sizeof(wbuf)/sizeof(wchar_t), NULL)) {
799 size_t written = wcstombs(buf, wbuf, buflen - 1);
800 if(written != (size_t)-1)
801 buf[written] = '\0';
802 else
803 *buf = '\0';
804 }
805
806 /* Truncate multiple lines */
807 p = strchr(buf, '\n');
808 if(p) {
809 if(p > buf && *(p-1) == '\r')
810 *(p-1) = '\0';
811 else
812 *p = '\0';
813 }
814
815 return (*buf ? buf : NULL);
816 }
817 #endif /* _WIN32 || _WIN32_WCE */
818
819 /*
820 * Our thread-safe and smart strerror() replacement.
821 *
822 * The 'err' argument passed in to this function MUST be a true errno number
823 * as reported on this system. We do no range checking on the number before
824 * we pass it to the "number-to-message" conversion function and there might
825 * be systems that do not do proper range checking in there themselves.
826 *
827 * We do not do range checking (on systems other than Windows) since there is
828 * no good reliable and portable way to do it.
829 *
830 * On Windows different types of error codes overlap. This function has an
831 * order of preference when trying to match error codes:
832 * CRT (errno), Winsock (WSAGetLastError), Windows API (GetLastError).
833 *
834 * It may be more correct to call one of the variant functions instead:
835 * Call Curl_sspi_strerror if the error code is definitely Windows SSPI.
836 * Call Curl_winapi_strerror if the error code is definitely Windows API.
837 */
Curl_strerror(int err,char * buf,size_t buflen)838 const char *Curl_strerror(int err, char *buf, size_t buflen)
839 {
840 #ifdef PRESERVE_WINDOWS_ERROR_CODE
841 DWORD old_win_err = GetLastError();
842 #endif
843 int old_errno = errno;
844 char *p;
845
846 if(!buflen)
847 return NULL;
848
849 #ifndef _WIN32
850 DEBUGASSERT(err >= 0);
851 #endif
852
853 *buf = '\0';
854
855 #if defined(_WIN32) || defined(_WIN32_WCE)
856 #if defined(_WIN32)
857 /* 'sys_nerr' is the maximum errno number, it is not widely portable */
858 if(err >= 0 && err < sys_nerr)
859 msnprintf(buf, buflen, "%s", sys_errlist[err]);
860 else
861 #endif
862 {
863 if(
864 #ifdef USE_WINSOCK
865 !get_winsock_error(err, buf, buflen) &&
866 #endif
867 !get_winapi_error(err, buf, buflen))
868 msnprintf(buf, buflen, "Unknown error %d (%#x)", err, err);
869 }
870 #else /* not Windows coming up */
871
872 #if defined(HAVE_STRERROR_R) && defined(HAVE_POSIX_STRERROR_R)
873 /*
874 * The POSIX-style strerror_r() may set errno to ERANGE if insufficient
875 * storage is supplied via 'strerrbuf' and 'buflen' to hold the generated
876 * message string, or EINVAL if 'errnum' is not a valid error number.
877 */
878 if(0 != strerror_r(err, buf, buflen)) {
879 if('\0' == buf[0])
880 msnprintf(buf, buflen, "Unknown error %d", err);
881 }
882 #elif defined(HAVE_STRERROR_R) && defined(HAVE_GLIBC_STRERROR_R)
883 /*
884 * The glibc-style strerror_r() only *might* use the buffer we pass to
885 * the function, but it always returns the error message as a pointer,
886 * so we must copy that string unconditionally (if non-NULL).
887 */
888 {
889 char buffer[256];
890 char *msg = strerror_r(err, buffer, sizeof(buffer));
891 if(msg)
892 msnprintf(buf, buflen, "%s", msg);
893 else
894 msnprintf(buf, buflen, "Unknown error %d", err);
895 }
896 #else
897 {
898 /* !checksrc! disable STRERROR 1 */
899 const char *msg = strerror(err);
900 if(msg)
901 msnprintf(buf, buflen, "%s", msg);
902 else
903 msnprintf(buf, buflen, "Unknown error %d", err);
904 }
905 #endif
906
907 #endif /* end of not Windows */
908
909 /* strip trailing '\r\n' or '\n'. */
910 p = strrchr(buf, '\n');
911 if(p && (p - buf) >= 2)
912 *p = '\0';
913 p = strrchr(buf, '\r');
914 if(p && (p - buf) >= 1)
915 *p = '\0';
916
917 if(errno != old_errno)
918 errno = old_errno;
919
920 #ifdef PRESERVE_WINDOWS_ERROR_CODE
921 if(old_win_err != GetLastError())
922 SetLastError(old_win_err);
923 #endif
924
925 return buf;
926 }
927
928 /*
929 * Curl_winapi_strerror:
930 * Variant of Curl_strerror if the error code is definitely Windows API.
931 */
932 #if defined(_WIN32) || defined(_WIN32_WCE)
Curl_winapi_strerror(DWORD err,char * buf,size_t buflen)933 const char *Curl_winapi_strerror(DWORD err, char *buf, size_t buflen)
934 {
935 #ifdef PRESERVE_WINDOWS_ERROR_CODE
936 DWORD old_win_err = GetLastError();
937 #endif
938 int old_errno = errno;
939
940 if(!buflen)
941 return NULL;
942
943 *buf = '\0';
944
945 #ifndef CURL_DISABLE_VERBOSE_STRINGS
946 if(!get_winapi_error((int)err, buf, buflen)) {
947 msnprintf(buf, buflen, "Unknown error %lu (0x%08lX)", err, err);
948 }
949 #else
950 {
951 const char *txt = (err == ERROR_SUCCESS) ? "No error" : "Error";
952 if(strlen(txt) < buflen)
953 strcpy(buf, txt);
954 }
955 #endif
956
957 if(errno != old_errno)
958 errno = old_errno;
959
960 #ifdef PRESERVE_WINDOWS_ERROR_CODE
961 if(old_win_err != GetLastError())
962 SetLastError(old_win_err);
963 #endif
964
965 return buf;
966 }
967 #endif /* _WIN32 || _WIN32_WCE */
968
969 #ifdef USE_WINDOWS_SSPI
970 /*
971 * Curl_sspi_strerror:
972 * Variant of Curl_strerror if the error code is definitely Windows SSPI.
973 */
Curl_sspi_strerror(int err,char * buf,size_t buflen)974 const char *Curl_sspi_strerror(int err, char *buf, size_t buflen)
975 {
976 #ifdef PRESERVE_WINDOWS_ERROR_CODE
977 DWORD old_win_err = GetLastError();
978 #endif
979 int old_errno = errno;
980 const char *txt;
981
982 if(!buflen)
983 return NULL;
984
985 *buf = '\0';
986
987 #ifndef CURL_DISABLE_VERBOSE_STRINGS
988
989 switch(err) {
990 case SEC_E_OK:
991 txt = "No error";
992 break;
993 #define SEC2TXT(sec) case sec: txt = #sec; break
994 SEC2TXT(CRYPT_E_REVOKED);
995 SEC2TXT(CRYPT_E_NO_REVOCATION_DLL);
996 SEC2TXT(CRYPT_E_NO_REVOCATION_CHECK);
997 SEC2TXT(CRYPT_E_REVOCATION_OFFLINE);
998 SEC2TXT(CRYPT_E_NOT_IN_REVOCATION_DATABASE);
999 SEC2TXT(SEC_E_ALGORITHM_MISMATCH);
1000 SEC2TXT(SEC_E_BAD_BINDINGS);
1001 SEC2TXT(SEC_E_BAD_PKGID);
1002 SEC2TXT(SEC_E_BUFFER_TOO_SMALL);
1003 SEC2TXT(SEC_E_CANNOT_INSTALL);
1004 SEC2TXT(SEC_E_CANNOT_PACK);
1005 SEC2TXT(SEC_E_CERT_EXPIRED);
1006 SEC2TXT(SEC_E_CERT_UNKNOWN);
1007 SEC2TXT(SEC_E_CERT_WRONG_USAGE);
1008 SEC2TXT(SEC_E_CONTEXT_EXPIRED);
1009 SEC2TXT(SEC_E_CROSSREALM_DELEGATION_FAILURE);
1010 SEC2TXT(SEC_E_CRYPTO_SYSTEM_INVALID);
1011 SEC2TXT(SEC_E_DECRYPT_FAILURE);
1012 SEC2TXT(SEC_E_DELEGATION_POLICY);
1013 SEC2TXT(SEC_E_DELEGATION_REQUIRED);
1014 SEC2TXT(SEC_E_DOWNGRADE_DETECTED);
1015 SEC2TXT(SEC_E_ENCRYPT_FAILURE);
1016 SEC2TXT(SEC_E_ILLEGAL_MESSAGE);
1017 SEC2TXT(SEC_E_INCOMPLETE_CREDENTIALS);
1018 SEC2TXT(SEC_E_INCOMPLETE_MESSAGE);
1019 SEC2TXT(SEC_E_INSUFFICIENT_MEMORY);
1020 SEC2TXT(SEC_E_INTERNAL_ERROR);
1021 SEC2TXT(SEC_E_INVALID_HANDLE);
1022 SEC2TXT(SEC_E_INVALID_PARAMETER);
1023 SEC2TXT(SEC_E_INVALID_TOKEN);
1024 SEC2TXT(SEC_E_ISSUING_CA_UNTRUSTED);
1025 SEC2TXT(SEC_E_ISSUING_CA_UNTRUSTED_KDC);
1026 SEC2TXT(SEC_E_KDC_CERT_EXPIRED);
1027 SEC2TXT(SEC_E_KDC_CERT_REVOKED);
1028 SEC2TXT(SEC_E_KDC_INVALID_REQUEST);
1029 SEC2TXT(SEC_E_KDC_UNABLE_TO_REFER);
1030 SEC2TXT(SEC_E_KDC_UNKNOWN_ETYPE);
1031 SEC2TXT(SEC_E_LOGON_DENIED);
1032 SEC2TXT(SEC_E_MAX_REFERRALS_EXCEEDED);
1033 SEC2TXT(SEC_E_MESSAGE_ALTERED);
1034 SEC2TXT(SEC_E_MULTIPLE_ACCOUNTS);
1035 SEC2TXT(SEC_E_MUST_BE_KDC);
1036 SEC2TXT(SEC_E_NOT_OWNER);
1037 SEC2TXT(SEC_E_NO_AUTHENTICATING_AUTHORITY);
1038 SEC2TXT(SEC_E_NO_CREDENTIALS);
1039 SEC2TXT(SEC_E_NO_IMPERSONATION);
1040 SEC2TXT(SEC_E_NO_IP_ADDRESSES);
1041 SEC2TXT(SEC_E_NO_KERB_KEY);
1042 SEC2TXT(SEC_E_NO_PA_DATA);
1043 SEC2TXT(SEC_E_NO_S4U_PROT_SUPPORT);
1044 SEC2TXT(SEC_E_NO_TGT_REPLY);
1045 SEC2TXT(SEC_E_OUT_OF_SEQUENCE);
1046 SEC2TXT(SEC_E_PKINIT_CLIENT_FAILURE);
1047 SEC2TXT(SEC_E_PKINIT_NAME_MISMATCH);
1048 SEC2TXT(SEC_E_POLICY_NLTM_ONLY);
1049 SEC2TXT(SEC_E_QOP_NOT_SUPPORTED);
1050 SEC2TXT(SEC_E_REVOCATION_OFFLINE_C);
1051 SEC2TXT(SEC_E_REVOCATION_OFFLINE_KDC);
1052 SEC2TXT(SEC_E_SECPKG_NOT_FOUND);
1053 SEC2TXT(SEC_E_SECURITY_QOS_FAILED);
1054 SEC2TXT(SEC_E_SHUTDOWN_IN_PROGRESS);
1055 SEC2TXT(SEC_E_SMARTCARD_CERT_EXPIRED);
1056 SEC2TXT(SEC_E_SMARTCARD_CERT_REVOKED);
1057 SEC2TXT(SEC_E_SMARTCARD_LOGON_REQUIRED);
1058 SEC2TXT(SEC_E_STRONG_CRYPTO_NOT_SUPPORTED);
1059 SEC2TXT(SEC_E_TARGET_UNKNOWN);
1060 SEC2TXT(SEC_E_TIME_SKEW);
1061 SEC2TXT(SEC_E_TOO_MANY_PRINCIPALS);
1062 SEC2TXT(SEC_E_UNFINISHED_CONTEXT_DELETED);
1063 SEC2TXT(SEC_E_UNKNOWN_CREDENTIALS);
1064 SEC2TXT(SEC_E_UNSUPPORTED_FUNCTION);
1065 SEC2TXT(SEC_E_UNSUPPORTED_PREAUTH);
1066 SEC2TXT(SEC_E_UNTRUSTED_ROOT);
1067 SEC2TXT(SEC_E_WRONG_CREDENTIAL_HANDLE);
1068 SEC2TXT(SEC_E_WRONG_PRINCIPAL);
1069 SEC2TXT(SEC_I_COMPLETE_AND_CONTINUE);
1070 SEC2TXT(SEC_I_COMPLETE_NEEDED);
1071 SEC2TXT(SEC_I_CONTEXT_EXPIRED);
1072 SEC2TXT(SEC_I_CONTINUE_NEEDED);
1073 SEC2TXT(SEC_I_INCOMPLETE_CREDENTIALS);
1074 SEC2TXT(SEC_I_LOCAL_LOGON);
1075 SEC2TXT(SEC_I_NO_LSA_CONTEXT);
1076 SEC2TXT(SEC_I_RENEGOTIATE);
1077 SEC2TXT(SEC_I_SIGNATURE_NEEDED);
1078 default:
1079 txt = "Unknown error";
1080 }
1081
1082 if(err == SEC_E_ILLEGAL_MESSAGE) {
1083 msnprintf(buf, buflen,
1084 "SEC_E_ILLEGAL_MESSAGE (0x%08X) - This error usually occurs "
1085 "when a fatal SSL/TLS alert is received (e.g. handshake failed)."
1086 " More detail may be available in the Windows System event log.",
1087 err);
1088 }
1089 else {
1090 char msgbuf[256];
1091 if(get_winapi_error(err, msgbuf, sizeof(msgbuf)))
1092 msnprintf(buf, buflen, "%s (0x%08X) - %s", txt, err, msgbuf);
1093 else
1094 msnprintf(buf, buflen, "%s (0x%08X)", txt, err);
1095 }
1096
1097 #else
1098 if(err == SEC_E_OK)
1099 txt = "No error";
1100 else
1101 txt = "Error";
1102 if(buflen > strlen(txt))
1103 strcpy(buf, txt);
1104 #endif
1105
1106 if(errno != old_errno)
1107 errno = old_errno;
1108
1109 #ifdef PRESERVE_WINDOWS_ERROR_CODE
1110 if(old_win_err != GetLastError())
1111 SetLastError(old_win_err);
1112 #endif
1113
1114 return buf;
1115 }
1116 #endif /* USE_WINDOWS_SSPI */
1117
