Minor corrections.
[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/err.h>
120 #include <openssl/crypto.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 int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b);
128 static unsigned long pid_hash(ERR_STATE *pid);
129 static int pid_cmp(ERR_STATE *a,ERR_STATE *pid);
130 static unsigned long get_error_values(int inc,const char **file,int *line,
131                                       const char **data,int *flags);
132 static void ERR_STATE_free(ERR_STATE *s);
133 #ifndef NO_ERR
134 static ERR_STRING_DATA ERR_str_libraries[]=
135         {
136 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
137 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
138 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
139 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
140 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
141 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
142 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
143 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
144 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
145 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
146 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
147 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
148 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuration file routines"},
149 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
150 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
151 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
152 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
153 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
154 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
155 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
156 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
157 {ERR_PACK(ERR_LIB_RAND,0,0)             ,"random number generator"},
158 {ERR_PACK(ERR_LIB_DSO,0,0)              ,"DSO support routines"},
159 {0,NULL},
160         };
161
162 static ERR_STRING_DATA ERR_str_functs[]=
163         {
164         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
165         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
166         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
167         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"}, 
168         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
169         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
170         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
171         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
172 #ifdef WINDOWS
173         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
174 #endif
175         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
176         {0,NULL},
177         };
178
179 static ERR_STRING_DATA ERR_str_reasons[]=
180         {
181 {ERR_R_FATAL                             ,"fatal"},
182 {ERR_R_SYS_LIB                          ,"system lib"},
183 {ERR_R_BN_LIB                           ,"BN lib"},
184 {ERR_R_RSA_LIB                          ,"RSA lib"},
185 {ERR_R_DH_LIB                           ,"DH lib"},
186 {ERR_R_EVP_LIB                          ,"EVP lib"},
187 {ERR_R_BUF_LIB                          ,"BUF lib"},
188 {ERR_R_BIO_LIB                          ,"BIO lib"},
189 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
190 {ERR_R_PEM_LIB                          ,"PEM lib"},
191 {ERR_R_X509_LIB                         ,"X509 lib"},
192 {ERR_R_METH_LIB                         ,"METH lib"},
193 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
194 {ERR_R_CONF_LIB                         ,"CONF lib"},
195 {ERR_R_SSL_LIB                          ,"SSL lib"},
196 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
197 {ERR_R_BIO_LIB                          ,"BIO lib"},
198 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
199 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
200 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
201 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
202 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
203 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
204 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
205 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
206 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
207 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
208 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
209 {ERR_R_DSO_LIB                          ,"DSO lib"},
210
211 {0,NULL},
212         };
213
214
215 #define NUM_SYS_STR_REASONS 127
216 #define LEN_SYS_STR_REASON 32
217
218 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
219 /* SYS_str_reasons is filled with copies of strerror() results at
220  * initialization.
221  * 'errno' values up to 127 should cover all usual errors,
222  * others will be displayed numerically by ERR_error_string.
223  * It is crucial that we have something for each reason code
224  * that occurs in ERR_str_reasons, or bogus reason strings
225  * will be returned for SYSerr(), which always gets an errno
226  * value and never one of those 'standard' reason codes. */
227
228 static void build_SYS_str_reasons()
229         {
230         /* Malloc cannot be used here, use static storage instead */
231         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
232         int i;
233
234         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
235
236         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
237                 {
238                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
239
240                 str->error = (unsigned long)i;
241                 if (str->string == NULL)
242                         {
243                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
244                         char *src = strerror(i);
245                         if (src != NULL)
246                                 {
247                                 strncpy(*dest, src, sizeof *dest);
248                                 (*dest)[sizeof *dest - 1] = '\0';
249                                 str->string = *dest;
250                                 }
251                         }
252                 if (str->string == NULL)
253                         str->string = "unknown";
254                 }
255
256         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
257          * as required by ERR_load_strings. */
258
259         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
260         }
261 #endif
262
263 #define err_clear_data(p,i) \
264         if (((p)->err_data[i] != NULL) && \
265                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
266                 {  \
267                 Free((p)->err_data[i]); \
268                 (p)->err_data[i]=NULL; \
269                 } \
270         (p)->err_data_flags[i]=0;
271
272 static void ERR_STATE_free(ERR_STATE *s)
273         {
274         int i;
275
276         if(s == NULL)
277             return;
278
279         for (i=0; i<ERR_NUM_ERRORS; i++)
280                 {
281                 err_clear_data(s,i);
282                 }
283         Free(s);
284         }
285
286 void ERR_load_ERR_strings(void)
287         {
288         static int init=1;
289
290         if (init)
291                 {
292                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
293                 if (init == 0)
294                         {
295                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
296                         return;
297                         }
298                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
299
300 #ifndef NO_ERR
301                 ERR_load_strings(0,ERR_str_libraries);
302                 ERR_load_strings(0,ERR_str_reasons);
303                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
304                 build_SYS_str_reasons();
305                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
306 #endif
307                 init=0;
308                 }
309         }
310
311 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
312         {
313         if (error_hash == NULL)
314                 {
315                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
316                 error_hash=lh_new(err_hash,err_cmp);
317                 if (error_hash == NULL)
318                         {
319                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
320                         return;
321                         }
322                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
323
324                 ERR_load_ERR_strings();
325                 }
326
327         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
328         while (str->error)
329                 {
330                 str->error|=ERR_PACK(lib,0,0);
331                 lh_insert(error_hash,str);
332                 str++;
333                 }
334         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
335         }
336
337 void ERR_free_strings(void)
338         {
339         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
340
341         if (error_hash != NULL)
342                 {
343                 lh_free(error_hash);
344                 error_hash=NULL;
345                 }
346
347         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
348         }
349
350 /********************************************************/
351
352 void ERR_put_error(int lib, int func, int reason, const char *file,
353              int line)
354         {
355         ERR_STATE *es;
356
357 #ifdef _OSD_POSIX
358         /* In the BS2000-OSD POSIX subsystem, the compiler generates
359          * path names in the form "*POSIX(/etc/passwd)".
360          * This dirty hack strips them to something sensible.
361          * @@@ We shouldn't modify a const string, though.
362          */
363         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
364                 char *end;
365
366                 /* Skip the "*POSIX(" prefix */
367                 file += sizeof("*POSIX(")-1;
368                 end = &file[strlen(file)-1];
369                 if (*end == ')')
370                         *end = '\0';
371                 /* Optional: use the basename of the path only. */
372                 if ((end = strrchr(file, '/')) != NULL)
373                         file = &end[1];
374         }
375 #endif
376         es=ERR_get_state();
377
378         es->top=(es->top+1)%ERR_NUM_ERRORS;
379         if (es->top == es->bottom)
380                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
381         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
382         es->err_file[es->top]=file;
383         es->err_line[es->top]=line;
384         err_clear_data(es,es->top);
385         }
386
387 void ERR_clear_error(void)
388         {
389         ERR_STATE *es;
390
391         es=ERR_get_state();
392
393 #if 0
394         /* hmm... is this needed */
395         for (i=0; i<ERR_NUM_ERRORS; i++)
396                 {
397                 es->err_buffer[i]=0;
398                 es->err_file[i]=NULL;
399                 es->err_line[i]= -1;
400                 err_clear_data(es,i);
401                 }
402 #endif
403         es->top=es->bottom=0;
404         }
405
406
407 unsigned long ERR_get_error(void)
408         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
409
410 unsigned long ERR_get_error_line(const char **file,
411              int *line)
412         { return(get_error_values(1,file,line,NULL,NULL)); }
413
414 unsigned long ERR_get_error_line_data(const char **file, int *line,
415              const char **data, int *flags)
416         { return(get_error_values(1,file,line,
417              data,flags)); }
418
419 unsigned long ERR_peek_error(void)
420         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
421
422 unsigned long ERR_peek_error_line(const char **file,
423              int *line)
424         { return(get_error_values(0,file,line,NULL,NULL)); }
425
426 unsigned long ERR_peek_error_line_data(const char **file, int *line,
427              const char **data, int *flags)
428         { return(get_error_values(0,file,line,
429              data,flags)); }
430
431 static unsigned long get_error_values(int inc, const char **file, int *line,
432              const char **data, int *flags)
433         {       
434         int i=0;
435         ERR_STATE *es;
436         unsigned long ret;
437
438         es=ERR_get_state();
439
440         if (es->bottom == es->top) return(0);
441         i=(es->bottom+1)%ERR_NUM_ERRORS;
442
443         ret=es->err_buffer[i];
444         if (inc)
445                 {
446                 es->bottom=i;
447                 es->err_buffer[i]=0;
448                 }
449
450         if ((file != NULL) && (line != NULL))
451                 {
452                 if (es->err_file[i] == NULL)
453                         {
454                         *file="NA";
455                         if (line != NULL) *line=0;
456                         }
457                 else
458                         {
459                         *file=es->err_file[i];
460                         if (line != NULL) *line=es->err_line[i];
461                         }
462                 }
463
464         if (data != NULL)
465                 {
466                 if (es->err_data[i] == NULL)
467                         {
468                         *data="";
469                         if (flags != NULL) *flags=0;
470                         }
471                 else
472                         {
473                         *data=es->err_data[i];
474                         if (flags != NULL) *flags=es->err_data_flags[i];
475                         }
476                 }
477         return(ret);
478         }
479
480 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
481 char *ERR_error_string(unsigned long e, char *ret)
482         {
483         static char buf[256];
484         const char *ls,*fs,*rs;
485         unsigned long l,f,r;
486         int i;
487
488         l=ERR_GET_LIB(e);
489         f=ERR_GET_FUNC(e);
490         r=ERR_GET_REASON(e);
491
492         ls=ERR_lib_error_string(e);
493         fs=ERR_func_error_string(e);
494         rs=ERR_reason_error_string(e);
495
496         if (ret == NULL) ret=buf;
497
498         sprintf(&(ret[0]),"error:%08lX:",e);
499         i=strlen(ret);
500         if (ls == NULL)
501                 sprintf(&(ret[i]),":lib(%lu) ",l);
502         else    sprintf(&(ret[i]),"%s",ls);
503         i=strlen(ret);
504         if (fs == NULL)
505                 sprintf(&(ret[i]),":func(%lu) ",f);
506         else    sprintf(&(ret[i]),":%s",fs);
507         i=strlen(ret);
508         if (rs == NULL)
509                 sprintf(&(ret[i]),":reason(%lu)",r);
510         else    sprintf(&(ret[i]),":%s",rs);
511
512         return(ret);
513         }
514
515 LHASH *ERR_get_string_table(void)
516         {
517         return(error_hash);
518         }
519
520 LHASH *ERR_get_err_state_table(void)
521         {
522         return(thread_hash);
523         }
524
525 const char *ERR_lib_error_string(unsigned long e)
526         {
527         ERR_STRING_DATA d,*p=NULL;
528         unsigned long l;
529
530         l=ERR_GET_LIB(e);
531
532         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
533
534         if (error_hash != NULL)
535                 {
536                 d.error=ERR_PACK(l,0,0);
537                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
538                 }
539
540         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
541
542         return((p == NULL)?NULL:p->string);
543         }
544
545 const char *ERR_func_error_string(unsigned long e)
546         {
547         ERR_STRING_DATA d,*p=NULL;
548         unsigned long l,f;
549
550         l=ERR_GET_LIB(e);
551         f=ERR_GET_FUNC(e);
552
553         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
554
555         if (error_hash != NULL)
556                 {
557                 d.error=ERR_PACK(l,f,0);
558                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
559                 }
560
561         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
562
563         return((p == NULL)?NULL:p->string);
564         }
565
566 const char *ERR_reason_error_string(unsigned long e)
567         {
568         ERR_STRING_DATA d,*p=NULL;
569         unsigned long l,r;
570
571         l=ERR_GET_LIB(e);
572         r=ERR_GET_REASON(e);
573
574         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
575
576         if (error_hash != NULL)
577                 {
578                 d.error=ERR_PACK(l,0,r);
579                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
580                 if (p == NULL)
581                         {
582                         d.error=ERR_PACK(0,0,r);
583                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
584                         }
585                 }
586
587         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
588
589         return((p == NULL)?NULL:p->string);
590         }
591
592 static unsigned long err_hash(ERR_STRING_DATA *a)
593         {
594         unsigned long ret,l;
595
596         l=a->error;
597         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
598         return(ret^ret%19*13);
599         }
600
601 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
602         {
603         return((int)(a->error-b->error));
604         }
605
606 static unsigned long pid_hash(ERR_STATE *a)
607         {
608         return(a->pid*13);
609         }
610
611 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
612         {
613         return((int)((long)a->pid - (long)b->pid));
614         }
615
616 void ERR_remove_state(unsigned long pid)
617         {
618         ERR_STATE *p,tmp;
619
620         if (thread_hash == NULL)
621                 return;
622         if (pid == 0)
623                 pid=(unsigned long)CRYPTO_thread_id();
624         tmp.pid=pid;
625         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
626         p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
627         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
628
629         if (p != NULL) ERR_STATE_free(p);
630         }
631
632 ERR_STATE *ERR_get_state(void)
633         {
634         static ERR_STATE fallback;
635         ERR_STATE *ret=NULL,tmp,*tmpp;
636         int i;
637         unsigned long pid;
638
639         pid=(unsigned long)CRYPTO_thread_id();
640
641         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
642         if (thread_hash == NULL)
643                 {
644                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
645                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
646                 if (thread_hash == NULL)
647                         {
648                         MemCheck_off();
649                         thread_hash=lh_new(pid_hash,pid_cmp);
650                         MemCheck_on();
651                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
652                         if (thread_hash == NULL) return(&fallback);
653                         }
654                 else
655                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
656                 }
657         else
658                 {
659                 tmp.pid=pid;
660                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
661                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
662                 }
663
664         /* ret == the error state, if NULL, make a new one */
665         if (ret == NULL)
666                 {
667                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
668                 if (ret == NULL) return(&fallback);
669                 ret->pid=pid;
670                 ret->top=0;
671                 ret->bottom=0;
672                 for (i=0; i<ERR_NUM_ERRORS; i++)
673                         {
674                         ret->err_data[i]=NULL;
675                         ret->err_data_flags[i]=0;
676                         }
677                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
678                 tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
679                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
680                 if (tmpp != NULL) /* old entry - should not happen */
681                         {
682                         ERR_STATE_free(tmpp);
683                         }
684                 }
685         return(ret);
686         }
687
688 int ERR_get_next_error_library(void)
689         {
690         static int value=ERR_LIB_USER;
691
692         return(value++);
693         }
694
695 void ERR_set_error_data(char *data, int flags)
696         {
697         ERR_STATE *es;
698         int i;
699
700         es=ERR_get_state();
701
702         i=es->top;
703         if (i == 0)
704                 i=ERR_NUM_ERRORS-1;
705
706         es->err_data[i]=data;
707         es->err_data_flags[es->top]=flags;
708         }
709
710 void ERR_add_error_data(int num, ...)
711         {
712         va_list args;
713         int i,n,s;
714         char *str,*p,*a;
715
716         s=64;
717         str=Malloc(s+1);
718         if (str == NULL) return;
719         str[0]='\0';
720
721         va_start(args, num);
722         n=0;
723         for (i=0; i<num; i++)
724                 {
725                 a=va_arg(args, char*);
726                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
727                 if (a != NULL)
728                         {
729                         n+=strlen(a);
730                         if (n > s)
731                                 {
732                                 s=n+20;
733                                 p=Realloc(str,s+1);
734                                 if (p == NULL)
735                                         {
736                                         Free(str);
737                                         return;
738                                         }
739                                 else
740                                         str=p;
741                                 }
742                         strcat(str,a);
743                         }
744                 }
745         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
746
747         va_end(args);
748         }
749