48eed688a6afb30343cfc3fde920c397aeabd7b1
[openssl.git] / crypto / err / err.c
1 /* crypto/err/err.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 /* ====================================================================
59  * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  *    notice, this list of conditions and the following disclaimer. 
67  *
68  * 2. Redistributions in binary form must reproduce the above copyright
69  *    notice, this list of conditions and the following disclaimer in
70  *    the documentation and/or other materials provided with the
71  *    distribution.
72  *
73  * 3. All advertising materials mentioning features or use of this
74  *    software must display the following acknowledgment:
75  *    "This product includes software developed by the OpenSSL Project
76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77  *
78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79  *    endorse or promote products derived from this software without
80  *    prior written permission. For written permission, please contact
81  *    openssl-core@openssl.org.
82  *
83  * 5. Products derived from this software may not be called "OpenSSL"
84  *    nor may "OpenSSL" appear in their names without prior written
85  *    permission of the OpenSSL Project.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  *    acknowledgment:
89  *    "This product includes software developed by the OpenSSL Project
90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103  * OF THE POSSIBILITY OF SUCH DAMAGE.
104  * ====================================================================
105  *
106  * This product includes cryptographic software written by Eric Young
107  * (eay@cryptsoft.com).  This product includes software written by Tim
108  * Hudson (tjh@cryptsoft.com).
109  *
110  */
111
112 #include <stdio.h>
113 #include <stdarg.h>
114 #include <string.h>
115 #include <openssl/lhash.h>
116 #include <openssl/crypto.h>
117 #include "cryptlib.h"
118 #include <openssl/buffer.h>
119 #include <openssl/bio.h>
120 #include <openssl/err.h>
121
122
123 static LHASH *error_hash=NULL;
124 static LHASH *thread_hash=NULL;
125
126 /* static unsigned long err_hash(ERR_STRING_DATA *a); */
127 static unsigned long err_hash(void *a_void);
128 /* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b); */
129 static int err_cmp(void *a_void, void *b_void);
130 /* static unsigned long pid_hash(ERR_STATE *pid); */
131 static unsigned long pid_hash(void *pid_void);
132 /* static int pid_cmp(ERR_STATE *a,ERR_STATE *pid); */
133 static int pid_cmp(void *a_void,void *pid_void);
134 static unsigned long get_error_values(int inc,const char **file,int *line,
135                                       const char **data,int *flags);
136
137 static void ERR_STATE_free(ERR_STATE *s);
138 #ifndef NO_ERR
139 static ERR_STRING_DATA ERR_str_libraries[]=
140         {
141 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
142 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
143 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
144 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
145 {ERR_PACK(ERR_LIB_DSA,0,0)              ,"dsa routines"},
146 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
147 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
148 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
149 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
150 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
151 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
152 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
153 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
154 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuration file routines"},
155 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
156 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
157 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
158 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
159 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
160 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
161 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
162 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
163 {ERR_PACK(ERR_LIB_RAND,0,0)             ,"random number generator"},
164 {ERR_PACK(ERR_LIB_DSO,0,0)              ,"DSO support routines"},
165 {ERR_PACK(ERR_LIB_ENGINE,0,0)           ,"engine routines"},
166 {0,NULL},
167         };
168
169 static ERR_STRING_DATA ERR_str_functs[]=
170         {
171         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
172         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
173         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
174         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"}, 
175         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
176         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
177         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
178         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
179 #ifdef WINDOWS
180         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
181 #endif
182         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
183         {0,NULL},
184         };
185
186 static ERR_STRING_DATA ERR_str_reasons[]=
187         {
188 {ERR_R_FATAL                             ,"fatal"},
189 {ERR_R_SYS_LIB                          ,"system lib"},
190 {ERR_R_BN_LIB                           ,"BN lib"},
191 {ERR_R_RSA_LIB                          ,"RSA lib"},
192 {ERR_R_DH_LIB                           ,"DH lib"},
193 {ERR_R_EVP_LIB                          ,"EVP lib"},
194 {ERR_R_BUF_LIB                          ,"BUF lib"},
195 {ERR_R_BIO_LIB                          ,"BIO lib"},
196 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
197 {ERR_R_PEM_LIB                          ,"PEM lib"},
198 {ERR_R_X509_LIB                         ,"X509 lib"},
199 {ERR_R_METH_LIB                         ,"METH lib"},
200 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
201 {ERR_R_CONF_LIB                         ,"CONF lib"},
202 {ERR_R_SSL_LIB                          ,"SSL lib"},
203 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
204 {ERR_R_BIO_LIB                          ,"BIO lib"},
205 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
206 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
207 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
208 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
209 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
210 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
211 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
212 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
213 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
214 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
215 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
216 {ERR_R_DSO_LIB                          ,"DSO lib"},
217 {ERR_R_ENGINE_LIB                       ,"ENGINE lib"},
218
219 {0,NULL},
220         };
221
222
223 #define NUM_SYS_STR_REASONS 127
224 #define LEN_SYS_STR_REASON 32
225
226 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
227 /* SYS_str_reasons is filled with copies of strerror() results at
228  * initialization.
229  * 'errno' values up to 127 should cover all usual errors,
230  * others will be displayed numerically by ERR_error_string.
231  * It is crucial that we have something for each reason code
232  * that occurs in ERR_str_reasons, or bogus reason strings
233  * will be returned for SYSerr(), which always gets an errno
234  * value and never one of those 'standard' reason codes. */
235
236 static void build_SYS_str_reasons()
237         {
238         /* OPENSSL_malloc cannot be used here, use static storage instead */
239         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
240         int i;
241
242         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
243
244         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
245                 {
246                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
247
248                 str->error = (unsigned long)i;
249                 if (str->string == NULL)
250                         {
251                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
252                         char *src = strerror(i);
253                         if (src != NULL)
254                                 {
255                                 strncpy(*dest, src, sizeof *dest);
256                                 (*dest)[sizeof *dest - 1] = '\0';
257                                 str->string = *dest;
258                                 }
259                         }
260                 if (str->string == NULL)
261                         str->string = "unknown";
262                 }
263
264         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
265          * as required by ERR_load_strings. */
266
267         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
268         }
269 #endif
270
271 #define err_clear_data(p,i) \
272         if (((p)->err_data[i] != NULL) && \
273                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
274                 {  \
275                 OPENSSL_free((p)->err_data[i]); \
276                 (p)->err_data[i]=NULL; \
277                 } \
278         (p)->err_data_flags[i]=0;
279
280 static void ERR_STATE_free(ERR_STATE *s)
281         {
282         int i;
283
284         if(s == NULL)
285             return;
286
287         for (i=0; i<ERR_NUM_ERRORS; i++)
288                 {
289                 err_clear_data(s,i);
290                 }
291         OPENSSL_free(s);
292         }
293
294 void ERR_load_ERR_strings(void)
295         {
296         static int init=1;
297
298         if (init)
299                 {
300                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
301                 if (init == 0)
302                         {
303                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
304                         return;
305                         }
306                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
307
308 #ifndef NO_ERR
309                 ERR_load_strings(0,ERR_str_libraries);
310                 ERR_load_strings(0,ERR_str_reasons);
311                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
312                 build_SYS_str_reasons();
313                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
314 #endif
315                 init=0;
316                 }
317         }
318
319 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
320         {
321         if (error_hash == NULL)
322                 {
323                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
324                 error_hash=lh_new(err_hash, err_cmp);
325                 if (error_hash == NULL)
326                         {
327                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
328                         return;
329                         }
330                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
331
332                 ERR_load_ERR_strings();
333                 }
334
335         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
336         while (str->error)
337                 {
338                 str->error|=ERR_PACK(lib,0,0);
339                 lh_insert(error_hash,str);
340                 str++;
341                 }
342         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
343         }
344
345 void ERR_free_strings(void)
346         {
347         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
348
349         if (error_hash != NULL)
350                 {
351                 lh_free(error_hash);
352                 error_hash=NULL;
353                 }
354
355         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
356         }
357
358 /********************************************************/
359
360 void ERR_put_error(int lib, int func, int reason, const char *file,
361              int line)
362         {
363         ERR_STATE *es;
364
365 #ifdef _OSD_POSIX
366         /* In the BS2000-OSD POSIX subsystem, the compiler generates
367          * path names in the form "*POSIX(/etc/passwd)".
368          * This dirty hack strips them to something sensible.
369          * @@@ We shouldn't modify a const string, though.
370          */
371         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
372                 char *end;
373
374                 /* Skip the "*POSIX(" prefix */
375                 file += sizeof("*POSIX(")-1;
376                 end = &file[strlen(file)-1];
377                 if (*end == ')')
378                         *end = '\0';
379                 /* Optional: use the basename of the path only. */
380                 if ((end = strrchr(file, '/')) != NULL)
381                         file = &end[1];
382         }
383 #endif
384         es=ERR_get_state();
385
386         es->top=(es->top+1)%ERR_NUM_ERRORS;
387         if (es->top == es->bottom)
388                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
389         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
390         es->err_file[es->top]=file;
391         es->err_line[es->top]=line;
392         err_clear_data(es,es->top);
393         }
394
395 void ERR_clear_error(void)
396         {
397         ERR_STATE *es;
398
399         es=ERR_get_state();
400
401 #if 0
402         /* hmm... is this needed */
403         for (i=0; i<ERR_NUM_ERRORS; i++)
404                 {
405                 es->err_buffer[i]=0;
406                 es->err_file[i]=NULL;
407                 es->err_line[i]= -1;
408                 err_clear_data(es,i);
409                 }
410 #endif
411         es->top=es->bottom=0;
412         }
413
414
415 unsigned long ERR_get_error(void)
416         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
417
418 unsigned long ERR_get_error_line(const char **file,
419              int *line)
420         { return(get_error_values(1,file,line,NULL,NULL)); }
421
422 unsigned long ERR_get_error_line_data(const char **file, int *line,
423              const char **data, int *flags)
424         { return(get_error_values(1,file,line,
425              data,flags)); }
426
427 unsigned long ERR_peek_error(void)
428         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
429
430 unsigned long ERR_peek_error_line(const char **file,
431              int *line)
432         { return(get_error_values(0,file,line,NULL,NULL)); }
433
434 unsigned long ERR_peek_error_line_data(const char **file, int *line,
435              const char **data, int *flags)
436         { return(get_error_values(0,file,line,
437              data,flags)); }
438
439 static unsigned long get_error_values(int inc, const char **file, int *line,
440              const char **data, int *flags)
441         {       
442         int i=0;
443         ERR_STATE *es;
444         unsigned long ret;
445
446         es=ERR_get_state();
447
448         if (es->bottom == es->top) return(0);
449         i=(es->bottom+1)%ERR_NUM_ERRORS;
450
451         ret=es->err_buffer[i];
452         if (inc)
453                 {
454                 es->bottom=i;
455                 es->err_buffer[i]=0;
456                 }
457
458         if ((file != NULL) && (line != NULL))
459                 {
460                 if (es->err_file[i] == NULL)
461                         {
462                         *file="NA";
463                         if (line != NULL) *line=0;
464                         }
465                 else
466                         {
467                         *file=es->err_file[i];
468                         if (line != NULL) *line=es->err_line[i];
469                         }
470                 }
471
472         if (data != NULL)
473                 {
474                 if (es->err_data[i] == NULL)
475                         {
476                         *data="";
477                         if (flags != NULL) *flags=0;
478                         }
479                 else
480                         {
481                         *data=es->err_data[i];
482                         if (flags != NULL) *flags=es->err_data_flags[i];
483                         }
484                 }
485         return(ret);
486         }
487
488 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
489         {
490         char lsbuf[64], fsbuf[64], rsbuf[64];
491         const char *ls,*fs,*rs;
492         unsigned long l,f,r;
493
494         l=ERR_GET_LIB(e);
495         f=ERR_GET_FUNC(e);
496         r=ERR_GET_REASON(e);
497
498         ls=ERR_lib_error_string(e);
499         fs=ERR_func_error_string(e);
500         rs=ERR_reason_error_string(e);
501
502         if (ls == NULL) 
503                 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
504         if (fs == NULL)
505                 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
506         if (rs == NULL)
507                 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
508
509         BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf, 
510                 fs?fs:fsbuf, rs?rs:rsbuf);
511         if (strlen(buf) == len-1)
512                 {
513                 /* output may be truncated; make sure we always have 5 
514                  * colon-separated fields, i.e. 4 colons ... */
515 #define NUM_COLONS 4
516                 if (len > NUM_COLONS) /* ... if possible */
517                         {
518                         int i;
519                         char *s = buf;
520                         
521                         for (i = 0; i < NUM_COLONS; i++)
522                                 {
523                                 char *colon = strchr(s, ':');
524                                 if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
525                                         {
526                                         /* set colon no. i at last possible position
527                                          * (buf[len-1] is the terminating 0)*/
528                                         colon = &buf[len-1] - NUM_COLONS + i;
529                                         *colon = ':';
530                                         }
531                                 s = colon + 1;
532                                 }
533                         }
534                 }
535         }
536
537 /* BAD for multi-threading: uses a local buffer if ret == NULL */
538 /* ERR_error_string_n should be used instead for ret != NULL
539  * as ERR_error_string cannot know how large the buffer is */
540 char *ERR_error_string(unsigned long e, char *ret)
541         {
542         static char buf[256];
543
544         if (ret == NULL) ret=buf;
545         ERR_error_string_n(e, ret, 256);
546
547         return(ret);
548         }
549
550 LHASH *ERR_get_string_table(void)
551         {
552         return(error_hash);
553         }
554
555 /* not thread-safe */
556 LHASH *ERR_get_err_state_table(void)
557         {
558         return(thread_hash);
559         }
560
561 const char *ERR_lib_error_string(unsigned long e)
562         {
563         ERR_STRING_DATA d,*p=NULL;
564         unsigned long l;
565
566         l=ERR_GET_LIB(e);
567
568         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
569
570         if (error_hash != NULL)
571                 {
572                 d.error=ERR_PACK(l,0,0);
573                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
574                 }
575
576         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
577
578         return((p == NULL)?NULL:p->string);
579         }
580
581 const char *ERR_func_error_string(unsigned long e)
582         {
583         ERR_STRING_DATA d,*p=NULL;
584         unsigned long l,f;
585
586         l=ERR_GET_LIB(e);
587         f=ERR_GET_FUNC(e);
588
589         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
590
591         if (error_hash != NULL)
592                 {
593                 d.error=ERR_PACK(l,f,0);
594                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
595                 }
596
597         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
598
599         return((p == NULL)?NULL:p->string);
600         }
601
602 const char *ERR_reason_error_string(unsigned long e)
603         {
604         ERR_STRING_DATA d,*p=NULL;
605         unsigned long l,r;
606
607         l=ERR_GET_LIB(e);
608         r=ERR_GET_REASON(e);
609
610         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
611
612         if (error_hash != NULL)
613                 {
614                 d.error=ERR_PACK(l,0,r);
615                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
616                 if (p == NULL)
617                         {
618                         d.error=ERR_PACK(0,0,r);
619                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
620                         }
621                 }
622
623         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
624
625         return((p == NULL)?NULL:p->string);
626         }
627
628 /* static unsigned long err_hash(ERR_STRING_DATA *a) */
629 static unsigned long err_hash(void *a_void)
630         {
631         unsigned long ret,l;
632
633         l=((ERR_STRING_DATA *)a_void)->error;
634         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
635         return(ret^ret%19*13);
636         }
637
638 /* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b) */
639 static int err_cmp(void *a_void, void *b_void)
640         {
641         return((int)(((ERR_STRING_DATA *)a_void)->error -
642                         ((ERR_STRING_DATA *)b_void)->error));
643         }
644
645 /* static unsigned long pid_hash(ERR_STATE *a) */
646 static unsigned long pid_hash(void *a_void)
647         {
648         return(((ERR_STATE *)a_void)->pid*13);
649         }
650
651 /* static int pid_cmp(ERR_STATE *a, ERR_STATE *b) */
652 static int pid_cmp(void *a_void, void *b_void)
653         {
654         return((int)((long)((ERR_STATE *)a_void)->pid -
655                         (long)((ERR_STATE *)b_void)->pid));
656         }
657
658 void ERR_remove_state(unsigned long pid)
659         {
660         ERR_STATE *p = NULL,tmp;
661
662         if (thread_hash == NULL)
663                 return;
664         if (pid == 0)
665                 pid=(unsigned long)CRYPTO_thread_id();
666         tmp.pid=pid;
667         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
668         if (thread_hash)
669                 {
670                 p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
671                 if (lh_num_items(thread_hash) == 0)
672                         {
673                         /* make sure we don't leak memory */
674                         lh_free(thread_hash);
675                         thread_hash = NULL;
676                         }
677                 }
678         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
679
680         if (p != NULL) ERR_STATE_free(p);
681         }
682
683 ERR_STATE *ERR_get_state(void)
684         {
685         static ERR_STATE fallback;
686         ERR_STATE *ret=NULL,tmp,*tmpp=NULL;
687         int thread_state_exists;
688         int i;
689         unsigned long pid;
690
691         pid=(unsigned long)CRYPTO_thread_id();
692
693         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
694         if (thread_hash != NULL)
695                 {
696                 tmp.pid=pid;
697                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
698                 }
699         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
700
701         /* ret == the error state, if NULL, make a new one */
702         if (ret == NULL)
703                 {
704                 ret=(ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
705                 if (ret == NULL) return(&fallback);
706                 ret->pid=pid;
707                 ret->top=0;
708                 ret->bottom=0;
709                 for (i=0; i<ERR_NUM_ERRORS; i++)
710                         {
711                         ret->err_data[i]=NULL;
712                         ret->err_data_flags[i]=0;
713                         }
714
715                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
716
717                 /* no entry yet in thread_hash for current thread -
718                  * thus, it may have changed since we last looked at it */
719                 if (thread_hash == NULL)
720                         thread_hash = lh_new(pid_hash, pid_cmp);
721                 if (thread_hash == NULL)
722                         thread_state_exists = 0; /* allocation error */
723                 else
724                         {
725                         tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
726                         thread_state_exists = 1;
727                         }
728
729                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
730
731                 if (!thread_state_exists)
732                         {
733                         ERR_STATE_free(ret); /* could not insert it */
734                         return(&fallback);
735                         }
736                 
737                 if (tmpp != NULL) /* old entry - should not happen */
738                         {
739                         ERR_STATE_free(tmpp);
740                         }
741                 }
742         return(ret);
743         }
744
745 int ERR_get_next_error_library(void)
746         {
747         static int value=ERR_LIB_USER;
748
749         return(value++);
750         }
751
752 void ERR_set_error_data(char *data, int flags)
753         {
754         ERR_STATE *es;
755         int i;
756
757         es=ERR_get_state();
758
759         i=es->top;
760         if (i == 0)
761                 i=ERR_NUM_ERRORS-1;
762
763         es->err_data[i]=data;
764         es->err_data_flags[es->top]=flags;
765         }
766
767 void ERR_add_error_data(int num, ...)
768         {
769         va_list args;
770         int i,n,s;
771         char *str,*p,*a;
772
773         s=64;
774         str=OPENSSL_malloc(s+1);
775         if (str == NULL) return;
776         str[0]='\0';
777
778         va_start(args, num);
779         n=0;
780         for (i=0; i<num; i++)
781                 {
782                 a=va_arg(args, char*);
783                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
784                 if (a != NULL)
785                         {
786                         n+=strlen(a);
787                         if (n > s)
788                                 {
789                                 s=n+20;
790                                 p=OPENSSL_realloc(str,s+1);
791                                 if (p == NULL)
792                                         {
793                                         OPENSSL_free(str);
794                                         return;
795                                         }
796                                 else
797                                         str=p;
798                                 }
799                         strcat(str,a);
800                         }
801                 }
802         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
803
804         va_end(args);
805         }
806