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