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 #include <stdio.h>
  60 #include <stdarg.h>
  61 #include <openssl/lhash.h>
  62 #include <openssl/crypto.h>
  63 #include "cryptlib.h"
  64 #include <openssl/buffer.h>
  65 #include <openssl/err.h>
  66 #include <openssl/crypto.h>
  67
  68
  69 static LHASH *error_hash=NULL;
  70 static LHASH *thread_hash=NULL;
  71
  72 static unsigned long err_hash(ERR_STRING_DATA *a);
  73 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b);
  74 static unsigned long pid_hash(ERR_STATE *pid);
  75 static int pid_cmp(ERR_STATE *a,ERR_STATE *pid);
  76 static unsigned long get_error_values(int inc,const char **file,int *line,
  77                                       const char **data,int *flags);
  78 static void ERR_STATE_free(ERR_STATE *s);
  79 #ifndef NO_ERR
  80 static ERR_STRING_DATA ERR_str_libraries[]=
  81         {
  82 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
  83 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
  84 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
  85 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
  86 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
  87 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
  88 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
  89 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
  90 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
  91 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
  92 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
  93 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
  94 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuation file routines"},
  95 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
  96 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
  97 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
  98 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
  99 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 100 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
 101 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
 102 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
 103 {0,NULL},
 104         };
 105
 106 static ERR_STRING_DATA ERR_str_functs[]=
 107         {
 108         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 109         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 110         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 111         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 112         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 113         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 114         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 115         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 116 #ifdef WINDOWS
 117         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 118 #endif
 119         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
 120         {0,NULL},
 121         };
 122
 123 static ERR_STRING_DATA ERR_str_reasons[]=
 124         {
 125 {ERR_R_FATAL                             ,"fatal"},
 126 {ERR_R_SYS_LIB                          ,"system lib"},
 127 {ERR_R_BN_LIB                           ,"BN lib"},
 128 {ERR_R_RSA_LIB                          ,"RSA lib"},
 129 {ERR_R_DH_LIB                           ,"DH lib"},
 130 {ERR_R_EVP_LIB                          ,"EVP lib"},
 131 {ERR_R_BUF_LIB                          ,"BUF lib"},
 132 {ERR_R_BIO_LIB                          ,"BIO lib"},
 133 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 134 {ERR_R_PEM_LIB                          ,"PEM lib"},
 135 {ERR_R_X509_LIB                         ,"X509 lib"},
 136 {ERR_R_METH_LIB                         ,"METH lib"},
 137 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 138 {ERR_R_CONF_LIB                         ,"CONF lib"},
 139 {ERR_R_SSL_LIB                          ,"SSL lib"},
 140 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 141 {ERR_R_BIO_LIB                          ,"BIO lib"},
 142 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 143 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
 144 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 145 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
 146 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 147 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 148 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 149 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 150 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 151 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 152 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 153
 154 {0,NULL},
 155         };
 156 #endif
 157
 158 #define err_clear_data(p,i) \
 159         if (((p)->err_data[i] != NULL) && \
 160                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 161                 {  \
 162                 Free((p)->err_data[i]); \
 163                 (p)->err_data[i]=NULL; \
 164                 } \
 165         (p)->err_data_flags[i]=0;
 166
 167 static void ERR_STATE_free(ERR_STATE *s)
 168         {
 169         int i;
 170
 171         if(s == NULL)
 172             return;
 173
 174         for (i=0; i<ERR_NUM_ERRORS; i++)
 175                 {
 176                 err_clear_data(s,i);
 177                 }
 178         Free(s);
 179         }
 180
 181 void ERR_load_ERR_strings(void)
 182         {
 183         static int init=1;
 184
 185         if (init)
 186                 {
 187                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 188                 if (init == 0)
 189                         {
 190                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 191                         return;
 192                         }
 193                 init=0;
 194                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 195
 196 #ifndef NO_ERR
 197                 ERR_load_strings(0,ERR_str_libraries);
 198                 ERR_load_strings(0,ERR_str_reasons);
 199                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 200 #endif
 201                 }
 202         }
 203
 204 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 205         {
 206         if (error_hash == NULL)
 207                 {
 208                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 209                 error_hash=lh_new(err_hash,err_cmp);
 210                 if (error_hash == NULL)
 211                         {
 212                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 213                         return;
 214                         }
 215                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 216
 217                 ERR_load_ERR_strings();
 218                 }
 219
 220         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 221         while (str->error)
 222                 {
 223                 str->error|=ERR_PACK(lib,0,0);
 224                 lh_insert(error_hash,(char *)str);
 225                 str++;
 226                 }
 227         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 228         }
 229
 230 void ERR_free_strings(void)
 231         {
 232         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 233
 234         if (error_hash != NULL)
 235                 {
 236                 lh_free(error_hash);
 237                 error_hash=NULL;
 238                 }
 239
 240         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 241         }
 242
 243 /********************************************************/
 244
 245 void ERR_put_error(int lib, int func, int reason, const char *file,
 246              int line)
 247         {
 248         ERR_STATE *es;
 249
 250 #ifdef _OSD_POSIX
 251         /* In the BS2000-OSD POSIX subsystem, the compiler generates
 252          * path names in the form "*POSIX(/etc/passwd)".
 253          * This dirty hack strips them to something sensible.
 254          * @@@ We shouldn't modify a const string, though.
 255          */
 256         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
 257                 char *end;
 258
 259                 /* Skip the "*POSIX(" prefix */
 260                 file += sizeof("*POSIX(")-1;
 261                 end = &file[strlen(file)-1];
 262                 if (*end == ')')
 263                         *end = '\0';
 264                 /* Optional: use the basename of the path only. */
 265                 if ((end = strrchr(file, '/')) != NULL)
 266                         file = &end[1];
 267         }
 268 #endif
 269         es=ERR_get_state();
 270
 271         es->top=(es->top+1)%ERR_NUM_ERRORS;
 272         if (es->top == es->bottom)
 273                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 274         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 275         es->err_file[es->top]=file;
 276         es->err_line[es->top]=line;
 277         err_clear_data(es,es->top);
 278         }
 279
 280 void ERR_clear_error(void)
 281         {
 282         ERR_STATE *es;
 283
 284         es=ERR_get_state();
 285
 286 #if 0
 287         /* hmm... is this needed */
 288         for (i=0; i<ERR_NUM_ERRORS; i++)
 289                 {
 290                 es->err_buffer[i]=0;
 291                 es->err_file[i]=NULL;
 292                 es->err_line[i]= -1;
 293                 err_clear_data(es,i);
 294                 }
 295 #endif
 296         es->top=es->bottom=0;
 297         }
 298
 299
 300 unsigned long ERR_get_error(void)
 301         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 302
 303 unsigned long ERR_get_error_line(const char **file,
 304              int *line)
 305         { return(get_error_values(1,file,line,NULL,NULL)); }
 306
 307 unsigned long ERR_get_error_line_data(const char **file, int *line,
 308              const char **data, int *flags)
 309         { return(get_error_values(1,file,line,
 310              data,flags)); }
 311
 312 unsigned long ERR_peek_error(void)
 313         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 314
 315 unsigned long ERR_peek_error_line(const char **file,
 316              int *line)
 317         { return(get_error_values(0,file,line,NULL,NULL)); }
 318
 319 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 320              const char **data, int *flags)
 321         { return(get_error_values(0,file,line,
 322              data,flags)); }
 323
 324 static unsigned long get_error_values(int inc, const char **file, int *line,
 325              const char **data, int *flags)
 326         {
 327         int i=0;
 328         ERR_STATE *es;
 329         unsigned long ret;
 330
 331         es=ERR_get_state();
 332
 333         if (es->bottom == es->top) return(0);
 334         i=(es->bottom+1)%ERR_NUM_ERRORS;
 335
 336         ret=es->err_buffer[i];
 337         if (inc)
 338                 {
 339                 es->bottom=i;
 340                 es->err_buffer[i]=0;
 341                 }
 342
 343         if ((file != NULL) && (line != NULL))
 344                 {
 345                 if (es->err_file[i] == NULL)
 346                         {
 347                         *file="NA";
 348                         if (line != NULL) *line=0;
 349                         }
 350                 else
 351                         {
 352                         *file=es->err_file[i];
 353                         if (line != NULL) *line=es->err_line[i];
 354                         }
 355                 }
 356
 357         if (data != NULL)
 358                 {
 359                 if (es->err_data[i] == NULL)
 360                         {
 361                         *data="";
 362                         if (flags != NULL) *flags=0;
 363                         }
 364                 else
 365                         {
 366                         *data=es->err_data[i];
 367                         if (flags != NULL) *flags=es->err_data_flags[i];
 368                         }
 369                 }
 370         return(ret);
 371         }
 372
 373 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
 374 char *ERR_error_string(unsigned long e, char *ret)
 375         {
 376         static char buf[256];
 377         const char *ls,*fs,*rs;
 378         unsigned long l,f,r;
 379         int i;
 380
 381         l=ERR_GET_LIB(e);
 382         f=ERR_GET_FUNC(e);
 383         r=ERR_GET_REASON(e);
 384
 385         ls=ERR_lib_error_string(e);
 386         fs=ERR_func_error_string(e);
 387         rs=ERR_reason_error_string(e);
 388
 389         if (ret == NULL) ret=buf;
 390
 391         sprintf(&(ret[0]),"error:%08lX:",e);
 392         i=strlen(ret);
 393         if (ls == NULL)
 394                 sprintf(&(ret[i]),":lib(%lu) ",l);
 395         else    sprintf(&(ret[i]),"%s",ls);
 396         i=strlen(ret);
 397         if (fs == NULL)
 398                 sprintf(&(ret[i]),":func(%lu) ",f);
 399         else    sprintf(&(ret[i]),":%s",fs);
 400         i=strlen(ret);
 401         if (rs == NULL)
 402                 sprintf(&(ret[i]),":reason(%lu)",r);
 403         else    sprintf(&(ret[i]),":%s",rs);
 404
 405         return(ret);
 406         }
 407
 408 LHASH *ERR_get_string_table(void)
 409         {
 410         return(error_hash);
 411         }
 412
 413 LHASH *ERR_get_err_state_table(void)
 414         {
 415         return(thread_hash);
 416         }
 417
 418 const char *ERR_lib_error_string(unsigned long e)
 419         {
 420         ERR_STRING_DATA d,*p=NULL;
 421         unsigned long l;
 422
 423         l=ERR_GET_LIB(e);
 424
 425         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 426
 427         if (error_hash != NULL)
 428                 {
 429                 d.error=ERR_PACK(l,0,0);
 430                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 431                 }
 432
 433         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 434
 435         return((p == NULL)?NULL:p->string);
 436         }
 437
 438 const char *ERR_func_error_string(unsigned long e)
 439         {
 440         ERR_STRING_DATA d,*p=NULL;
 441         unsigned long l,f;
 442
 443         l=ERR_GET_LIB(e);
 444         f=ERR_GET_FUNC(e);
 445
 446         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 447
 448         if (error_hash != NULL)
 449                 {
 450                 d.error=ERR_PACK(l,f,0);
 451                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 452                 }
 453
 454         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 455
 456         return((p == NULL)?NULL:p->string);
 457         }
 458
 459 const char *ERR_reason_error_string(unsigned long e)
 460         {
 461         ERR_STRING_DATA d,*p=NULL;
 462         unsigned long l,r;
 463
 464         l=ERR_GET_LIB(e);
 465         r=ERR_GET_REASON(e);
 466
 467         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 468
 469         if (error_hash != NULL)
 470                 {
 471                 d.error=ERR_PACK(l,0,r);
 472                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 473                 if (p == NULL)
 474                         {
 475                         d.error=ERR_PACK(0,0,r);
 476                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,
 477                                 (char *)&d);
 478                         }
 479                 }
 480
 481         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 482
 483         return((p == NULL)?NULL:p->string);
 484         }
 485
 486 static unsigned long err_hash(ERR_STRING_DATA *a)
 487         {
 488         unsigned long ret,l;
 489
 490         l=a->error;
 491         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 492         return(ret^ret%19*13);
 493         }
 494
 495 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
 496         {
 497         return((int)(a->error-b->error));
 498         }
 499
 500 static unsigned long pid_hash(ERR_STATE *a)
 501         {
 502         return(a->pid*13);
 503         }
 504
 505 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
 506         {
 507         return((int)((long)a->pid - (long)b->pid));
 508         }
 509
 510 void ERR_remove_state(unsigned long pid)
 511         {
 512         ERR_STATE *p,tmp;
 513
 514         if (thread_hash == NULL)
 515                 return;
 516         if (pid == 0)
 517                 pid=(unsigned long)CRYPTO_thread_id();
 518         tmp.pid=pid;
 519         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 520         p=(ERR_STATE *)lh_delete(thread_hash,(char *)&tmp);
 521         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 522
 523         if (p != NULL) ERR_STATE_free(p);
 524         }
 525
 526 ERR_STATE *ERR_get_state(void)
 527         {
 528         static ERR_STATE fallback;
 529         ERR_STATE *ret=NULL,tmp,*tmpp;
 530         int i;
 531         unsigned long pid;
 532
 533         pid=(unsigned long)CRYPTO_thread_id();
 534
 535         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 536         if (thread_hash == NULL)
 537                 {
 538                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 539                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 540                 if (thread_hash == NULL)
 541                         {
 542                         MemCheck_off();
 543                         thread_hash=lh_new(pid_hash,pid_cmp);
 544                         MemCheck_on();
 545                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 546                         if (thread_hash == NULL) return(&fallback);
 547                         }
 548                 else
 549                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 550                 }
 551         else
 552                 {
 553                 tmp.pid=pid;
 554                 ret=(ERR_STATE *)lh_retrieve(thread_hash,(char *)&tmp);
 555                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 556                 }
 557
 558         /* ret == the error state, if NULL, make a new one */
 559         if (ret == NULL)
 560                 {
 561                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 562                 if (ret == NULL) return(&fallback);
 563                 ret->pid=pid;
 564                 ret->top=0;
 565                 ret->bottom=0;
 566                 for (i=0; i<ERR_NUM_ERRORS; i++)
 567                         {
 568                         ret->err_data[i]=NULL;
 569                         ret->err_data_flags[i]=0;
 570                         }
 571                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 572                 tmpp=(ERR_STATE *)lh_insert(thread_hash,(char *)ret);
 573                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 574                 if (tmpp != NULL) /* old entry - should not happen */
 575                         {
 576                         ERR_STATE_free(tmpp);
 577                         }
 578                 }
 579         return(ret);
 580         }
 581
 582 int ERR_get_next_error_library(void)
 583         {
 584         static int value=ERR_LIB_USER;
 585
 586         return(value++);
 587         }
 588
 589 void ERR_set_error_data(char *data, int flags)
 590         {
 591         ERR_STATE *es;
 592         int i;
 593
 594         es=ERR_get_state();
 595
 596         i=es->top;
 597         if (i == 0)
 598                 i=ERR_NUM_ERRORS-1;
 599
 600         es->err_data[i]=data;
 601         es->err_data_flags[es->top]=flags;
 602         }
 603
 604 void ERR_add_error_data(int num, ...)
 605         {
 606         va_list args;
 607         int i,n,s;
 608         char *str,*p,*a;
 609
 610         s=64;
 611         str=Malloc(s+1);
 612         if (str == NULL) return;
 613         str[0]='\0';
 614
 615         va_start(args, num);
 616         n=0;
 617         for (i=0; i<num; i++)
 618                 {
 619                 a=va_arg(args, char*);
 620                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 621                 if (a != NULL)
 622                         {
 623                         n+=strlen(a);
 624                         if (n > s)
 625                                 {
 626                                 s=n+20;
 627                                 p=Realloc(str,s+1);
 628                                 if (p == NULL)
 629                                         {
 630                                         Free(str);
 631                                         return;
 632                                         }
 633                                 else
 634                                         str=p;
 635                                 }
 636                         strcat(str,a);
 637                         }
 638                 }
 639         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 640
 641         va_end(args);
 642         }
 643