eb8c76aa0bed702985f18dfc300bdca19cc21ff2
[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 {0,NULL},
159         };
160
161 static ERR_STRING_DATA ERR_str_functs[]=
162         {
163         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
164         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
165         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
166         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"}, 
167         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
168         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
169         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
170         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
171 #ifdef WINDOWS
172         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
173 #endif
174         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
175         {0,NULL},
176         };
177
178 static ERR_STRING_DATA ERR_str_reasons[]=
179         {
180 {ERR_R_FATAL                             ,"fatal"},
181 {ERR_R_SYS_LIB                          ,"system lib"},
182 {ERR_R_BN_LIB                           ,"BN lib"},
183 {ERR_R_RSA_LIB                          ,"RSA lib"},
184 {ERR_R_DH_LIB                           ,"DH lib"},
185 {ERR_R_EVP_LIB                          ,"EVP lib"},
186 {ERR_R_BUF_LIB                          ,"BUF lib"},
187 {ERR_R_BIO_LIB                          ,"BIO lib"},
188 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
189 {ERR_R_PEM_LIB                          ,"PEM lib"},
190 {ERR_R_X509_LIB                         ,"X509 lib"},
191 {ERR_R_METH_LIB                         ,"METH lib"},
192 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
193 {ERR_R_CONF_LIB                         ,"CONF lib"},
194 {ERR_R_SSL_LIB                          ,"SSL lib"},
195 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
196 {ERR_R_BIO_LIB                          ,"BIO lib"},
197 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
198 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
199 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
200 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
201 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
202 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
203 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
204 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
205 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
206 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
207 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
208
209 {0,NULL},
210         };
211
212
213 #define NUM_SYS_STR_REASONS 127
214 #define LEN_SYS_STR_REASON 32
215
216 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
217 /* SYS_str_reasons is filled with copies of strerror() results at
218  * initialization.
219  * 'errno' values up to 127 should cover all usual errors,
220  * others will be displayed numerically by ERR_error_string.
221  * It is crucial that we have something for each reason code
222  * that occurs in ERR_str_reasons, or bogus reason strings
223  * will be returned for SYSerr(), which always gets an errno
224  * value and never one of those 'standard' reason codes. */
225
226 static void build_SYS_str_reasons()
227         {
228         /* Malloc cannot be used here, use static storage instead */
229         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
230         int i;
231
232         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
233
234         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
235                 {
236                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
237
238                 str->error = (unsigned long)i;
239                 if (str->string == NULL)
240                         {
241                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
242                         char *src = strerror(i);
243                         if (src != NULL)
244                                 {
245                                 strncpy(*dest, src, sizeof *dest);
246                                 (*dest)[sizeof *dest - 1] = '\0';
247                                 str->string = *dest;
248                                 }
249                         }
250                 if (str->string == NULL)
251                         str->string = "unknown";
252                 }
253
254         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
255          * as required by ERR_load_strings. */
256
257         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
258         }
259 #endif
260
261 #define err_clear_data(p,i) \
262         if (((p)->err_data[i] != NULL) && \
263                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
264                 {  \
265                 Free((p)->err_data[i]); \
266                 (p)->err_data[i]=NULL; \
267                 } \
268         (p)->err_data_flags[i]=0;
269
270 static void ERR_STATE_free(ERR_STATE *s)
271         {
272         int i;
273
274         if(s == NULL)
275             return;
276
277         for (i=0; i<ERR_NUM_ERRORS; i++)
278                 {
279                 err_clear_data(s,i);
280                 }
281         Free(s);
282         }
283
284 void ERR_load_ERR_strings(void)
285         {
286         static int init=1;
287
288         if (init)
289                 {
290                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
291                 if (init == 0)
292                         {
293                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
294                         return;
295                         }
296                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
297
298 #ifndef NO_ERR
299                 ERR_load_strings(0,ERR_str_libraries);
300                 ERR_load_strings(0,ERR_str_reasons);
301                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
302                 build_SYS_str_reasons();
303                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
304 #endif
305                 init=0;
306                 }
307         }
308
309 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
310         {
311         if (error_hash == NULL)
312                 {
313                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
314                 error_hash=lh_new(err_hash,err_cmp);
315                 if (error_hash == NULL)
316                         {
317                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
318                         return;
319                         }
320                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
321
322                 ERR_load_ERR_strings();
323                 }
324
325         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
326         while (str->error)
327                 {
328                 str->error|=ERR_PACK(lib,0,0);
329                 lh_insert(error_hash,str);
330                 str++;
331                 }
332         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
333         }
334
335 void ERR_free_strings(void)
336         {
337         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
338
339         if (error_hash != NULL)
340                 {
341                 lh_free(error_hash);
342                 error_hash=NULL;
343                 }
344
345         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
346         }
347
348 /********************************************************/
349
350 void ERR_put_error(int lib, int func, int reason, const char *file,
351              int line)
352         {
353         ERR_STATE *es;
354
355 #ifdef _OSD_POSIX
356         /* In the BS2000-OSD POSIX subsystem, the compiler generates
357          * path names in the form "*POSIX(/etc/passwd)".
358          * This dirty hack strips them to something sensible.
359          * @@@ We shouldn't modify a const string, though.
360          */
361         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
362                 char *end;
363
364                 /* Skip the "*POSIX(" prefix */
365                 file += sizeof("*POSIX(")-1;
366                 end = &file[strlen(file)-1];
367                 if (*end == ')')
368                         *end = '\0';
369                 /* Optional: use the basename of the path only. */
370                 if ((end = strrchr(file, '/')) != NULL)
371                         file = &end[1];
372         }
373 #endif
374         es=ERR_get_state();
375
376         es->top=(es->top+1)%ERR_NUM_ERRORS;
377         if (es->top == es->bottom)
378                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
379         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
380         es->err_file[es->top]=file;
381         es->err_line[es->top]=line;
382         err_clear_data(es,es->top);
383         }
384
385 void ERR_clear_error(void)
386         {
387         ERR_STATE *es;
388
389         es=ERR_get_state();
390
391 #if 0
392         /* hmm... is this needed */
393         for (i=0; i<ERR_NUM_ERRORS; i++)
394                 {
395                 es->err_buffer[i]=0;
396                 es->err_file[i]=NULL;
397                 es->err_line[i]= -1;
398                 err_clear_data(es,i);
399                 }
400 #endif
401         es->top=es->bottom=0;
402         }
403
404
405 unsigned long ERR_get_error(void)
406         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
407
408 unsigned long ERR_get_error_line(const char **file,
409              int *line)
410         { return(get_error_values(1,file,line,NULL,NULL)); }
411
412 unsigned long ERR_get_error_line_data(const char **file, int *line,
413              const char **data, int *flags)
414         { return(get_error_values(1,file,line,
415              data,flags)); }
416
417 unsigned long ERR_peek_error(void)
418         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
419
420 unsigned long ERR_peek_error_line(const char **file,
421              int *line)
422         { return(get_error_values(0,file,line,NULL,NULL)); }
423
424 unsigned long ERR_peek_error_line_data(const char **file, int *line,
425              const char **data, int *flags)
426         { return(get_error_values(0,file,line,
427              data,flags)); }
428
429 static unsigned long get_error_values(int inc, const char **file, int *line,
430              const char **data, int *flags)
431         {       
432         int i=0;
433         ERR_STATE *es;
434         unsigned long ret;
435
436         es=ERR_get_state();
437
438         if (es->bottom == es->top) return(0);
439         i=(es->bottom+1)%ERR_NUM_ERRORS;
440
441         ret=es->err_buffer[i];
442         if (inc)
443                 {
444                 es->bottom=i;
445                 es->err_buffer[i]=0;
446                 }
447
448         if ((file != NULL) && (line != NULL))
449                 {
450                 if (es->err_file[i] == NULL)
451                         {
452                         *file="NA";
453                         if (line != NULL) *line=0;
454                         }
455                 else
456                         {
457                         *file=es->err_file[i];
458                         if (line != NULL) *line=es->err_line[i];
459                         }
460                 }
461
462         if (data != NULL)
463                 {
464                 if (es->err_data[i] == NULL)
465                         {
466                         *data="";
467                         if (flags != NULL) *flags=0;
468                         }
469                 else
470                         {
471                         *data=es->err_data[i];
472                         if (flags != NULL) *flags=es->err_data_flags[i];
473                         }
474                 }
475         return(ret);
476         }
477
478 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
479 char *ERR_error_string(unsigned long e, char *ret)
480         {
481         static char buf[256];
482         const char *ls,*fs,*rs;
483         unsigned long l,f,r;
484         int i;
485
486         l=ERR_GET_LIB(e);
487         f=ERR_GET_FUNC(e);
488         r=ERR_GET_REASON(e);
489
490         ls=ERR_lib_error_string(e);
491         fs=ERR_func_error_string(e);
492         rs=ERR_reason_error_string(e);
493
494         if (ret == NULL) ret=buf;
495
496         sprintf(&(ret[0]),"error:%08lX:",e);
497         i=strlen(ret);
498         if (ls == NULL)
499                 sprintf(&(ret[i]),":lib(%lu) ",l);
500         else    sprintf(&(ret[i]),"%s",ls);
501         i=strlen(ret);
502         if (fs == NULL)
503                 sprintf(&(ret[i]),":func(%lu) ",f);
504         else    sprintf(&(ret[i]),":%s",fs);
505         i=strlen(ret);
506         if (rs == NULL)
507                 sprintf(&(ret[i]),":reason(%lu)",r);
508         else    sprintf(&(ret[i]),":%s",rs);
509
510         return(ret);
511         }
512
513 LHASH *ERR_get_string_table(void)
514         {
515         return(error_hash);
516         }
517
518 LHASH *ERR_get_err_state_table(void)
519         {
520         return(thread_hash);
521         }
522
523 const char *ERR_lib_error_string(unsigned long e)
524         {
525         ERR_STRING_DATA d,*p=NULL;
526         unsigned long l;
527
528         l=ERR_GET_LIB(e);
529
530         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
531
532         if (error_hash != NULL)
533                 {
534                 d.error=ERR_PACK(l,0,0);
535                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
536                 }
537
538         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
539
540         return((p == NULL)?NULL:p->string);
541         }
542
543 const char *ERR_func_error_string(unsigned long e)
544         {
545         ERR_STRING_DATA d,*p=NULL;
546         unsigned long l,f;
547
548         l=ERR_GET_LIB(e);
549         f=ERR_GET_FUNC(e);
550
551         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
552
553         if (error_hash != NULL)
554                 {
555                 d.error=ERR_PACK(l,f,0);
556                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
557                 }
558
559         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
560
561         return((p == NULL)?NULL:p->string);
562         }
563
564 const char *ERR_reason_error_string(unsigned long e)
565         {
566         ERR_STRING_DATA d,*p=NULL;
567         unsigned long l,r;
568
569         l=ERR_GET_LIB(e);
570         r=ERR_GET_REASON(e);
571
572         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
573
574         if (error_hash != NULL)
575                 {
576                 d.error=ERR_PACK(l,0,r);
577                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
578                 if (p == NULL)
579                         {
580                         d.error=ERR_PACK(0,0,r);
581                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
582                         }
583                 }
584
585         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
586
587         return((p == NULL)?NULL:p->string);
588         }
589
590 static unsigned long err_hash(ERR_STRING_DATA *a)
591         {
592         unsigned long ret,l;
593
594         l=a->error;
595         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
596         return(ret^ret%19*13);
597         }
598
599 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
600         {
601         return((int)(a->error-b->error));
602         }
603
604 static unsigned long pid_hash(ERR_STATE *a)
605         {
606         return(a->pid*13);
607         }
608
609 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
610         {
611         return((int)((long)a->pid - (long)b->pid));
612         }
613
614 void ERR_remove_state(unsigned long pid)
615         {
616         ERR_STATE *p,tmp;
617
618         if (thread_hash == NULL)
619                 return;
620         if (pid == 0)
621                 pid=(unsigned long)CRYPTO_thread_id();
622         tmp.pid=pid;
623         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
624         p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
625         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
626
627         if (p != NULL) ERR_STATE_free(p);
628         }
629
630 ERR_STATE *ERR_get_state(void)
631         {
632         static ERR_STATE fallback;
633         ERR_STATE *ret=NULL,tmp,*tmpp;
634         int i;
635         unsigned long pid;
636
637         pid=(unsigned long)CRYPTO_thread_id();
638
639         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
640         if (thread_hash == NULL)
641                 {
642                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
643                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
644                 if (thread_hash == NULL)
645                         {
646                         MemCheck_off();
647                         thread_hash=lh_new(pid_hash,pid_cmp);
648                         MemCheck_on();
649                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
650                         if (thread_hash == NULL) return(&fallback);
651                         }
652                 else
653                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
654                 }
655         else
656                 {
657                 tmp.pid=pid;
658                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
659                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
660                 }
661
662         /* ret == the error state, if NULL, make a new one */
663         if (ret == NULL)
664                 {
665                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
666                 if (ret == NULL) return(&fallback);
667                 ret->pid=pid;
668                 ret->top=0;
669                 ret->bottom=0;
670                 for (i=0; i<ERR_NUM_ERRORS; i++)
671                         {
672                         ret->err_data[i]=NULL;
673                         ret->err_data_flags[i]=0;
674                         }
675                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
676                 tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
677                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
678                 if (tmpp != NULL) /* old entry - should not happen */
679                         {
680                         ERR_STATE_free(tmpp);
681                         }
682                 }
683         return(ret);
684         }
685
686 int ERR_get_next_error_library(void)
687         {
688         static int value=ERR_LIB_USER;
689
690         return(value++);
691         }
692
693 void ERR_set_error_data(char *data, int flags)
694         {
695         ERR_STATE *es;
696         int i;
697
698         es=ERR_get_state();
699
700         i=es->top;
701         if (i == 0)
702                 i=ERR_NUM_ERRORS-1;
703
704         es->err_data[i]=data;
705         es->err_data_flags[es->top]=flags;
706         }
707
708 void ERR_add_error_data(int num, ...)
709         {
710         va_list args;
711         int i,n,s;
712         char *str,*p,*a;
713
714         s=64;
715         str=Malloc(s+1);
716         if (str == NULL) return;
717         str[0]='\0';
718
719         va_start(args, num);
720         n=0;
721         for (i=0; i<num; i++)
722                 {
723                 a=va_arg(args, char*);
724                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
725                 if (a != NULL)
726                         {
727                         n+=strlen(a);
728                         if (n > s)
729                                 {
730                                 s=n+20;
731                                 p=Realloc(str,s+1);
732                                 if (p == NULL)
733                                         {
734                                         Free(str);
735                                         return;
736                                         }
737                                 else
738                                         str=p;
739                                 }
740                         strcat(str,a);
741                         }
742                 }
743         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
744
745         va_end(args);
746         }
747