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 "lhash.h"
  61 #include "crypto.h"
  62 #include "cryptlib.h"
  63 #include "buffer.h"
  64 #include "err.h"
  65 #include "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,char **file,int *line,
  77         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 {0,NULL},
 112         };
 113
 114 static ERR_STRING_DATA ERR_str_functs[]=
 115         {
 116         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 117         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 118         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 119         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 120         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 121         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 122         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 123         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 124 #ifdef WINDOWS
 125         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 126 #endif
 127         {0,NULL},
 128         };
 129
 130 static ERR_STRING_DATA ERR_str_reasons[]=
 131         {
 132 {ERR_R_FATAL                             ,"fatal"},
 133 {ERR_R_SYS_LIB                          ,"system lib"},
 134 {ERR_R_BN_LIB                           ,"BN lib"},
 135 {ERR_R_RSA_LIB                          ,"RSA lib"},
 136 {ERR_R_DH_LIB                           ,"DH lib"},
 137 {ERR_R_EVP_LIB                          ,"EVP lib"},
 138 {ERR_R_BUF_LIB                          ,"BUF lib"},
 139 {ERR_R_BIO_LIB                          ,"BIO lib"},
 140 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 141 {ERR_R_PEM_LIB                          ,"PEM lib"},
 142 {ERR_R_X509_LIB                         ,"X509 lib"},
 143 {ERR_R_METH_LIB                         ,"METH lib"},
 144 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 145 {ERR_R_CONF_LIB                         ,"CONF lib"},
 146 {ERR_R_SSL_LIB                          ,"SSL lib"},
 147 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 148 {ERR_R_BIO_LIB                          ,"BIO lib"},
 149 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 150 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 151 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a fuction you should not call"},
 152 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 153 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 154 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 155 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 156 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 157 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 158 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 159
 160 {0,NULL},
 161         };
 162 #endif
 163
 164 #define err_clear_data(p,i) \
 165         if (((p)->err_data[i] != NULL) && \
 166                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 167                 {  \
 168                 Free((p)->err_data[i]); \
 169                 (p)->err_data[i]=NULL; \
 170                 } \
 171         (p)->err_data_flags[i]=0;
 172
 173 static void ERR_STATE_free(s)
 174 ERR_STATE *s;
 175         {
 176         int i;
 177
 178         for (i=0; i<ERR_NUM_ERRORS; i++)
 179                 {
 180                 err_clear_data(s,i);
 181                 }
 182         Free(s);
 183         }
 184
 185 void ERR_load_ERR_strings()
 186         {
 187         static int init=1;
 188
 189         if (init)
 190                 {
 191                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 192                 if (init == 0)
 193                         {
 194                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 195                         return;
 196                         }
 197                 init=0;
 198                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 199
 200 #ifndef NO_ERR
 201                 ERR_load_strings(0,ERR_str_libraries);
 202                 ERR_load_strings(0,ERR_str_reasons);
 203                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 204 #endif
 205                 }
 206         }
 207
 208 void ERR_load_strings(lib,str)
 209 int lib;
 210 ERR_STRING_DATA *str;
 211         {
 212         if (error_hash == NULL)
 213                 {
 214                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 215                 error_hash=lh_new(err_hash,err_cmp);
 216                 if (error_hash == NULL)
 217                         {
 218                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 219                         return;
 220                         }
 221                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 222
 223                 ERR_load_ERR_strings();
 224                 }
 225
 226         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 227         while (str->error)
 228                 {
 229                 str->error|=ERR_PACK(lib,0,0);
 230                 lh_insert(error_hash,(char *)str);
 231                 str++;
 232                 }
 233         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 234         }
 235
 236 void ERR_free_strings()
 237         {
 238         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 239
 240         if (error_hash != NULL)
 241                 {
 242                 lh_free(error_hash);
 243                 error_hash=NULL;
 244                 }
 245
 246         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 247         }
 248
 249 /********************************************************/
 250
 251 void ERR_put_error(lib,func,reason,file,line)
 252 int lib,func,reason;
 253 char *file;
 254 int line;
 255         {
 256         ERR_STATE *es;
 257
 258         es=ERR_get_state();
 259
 260         es->top=(es->top+1)%ERR_NUM_ERRORS;
 261         if (es->top == es->bottom)
 262                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 263         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 264         es->err_file[es->top]=file;
 265         es->err_line[es->top]=line;
 266         err_clear_data(es,es->top);
 267         }
 268
 269 void ERR_clear_error()
 270         {
 271         ERR_STATE *es;
 272
 273         es=ERR_get_state();
 274
 275 #if 0
 276         /* hmm... is this needed */
 277         for (i=0; i<ERR_NUM_ERRORS; i++)
 278                 {
 279                 es->err_buffer[i]=0;
 280                 es->err_file[i]=NULL;
 281                 es->err_line[i]= -1;
 282                 err_clear_data(es,i);
 283                 }
 284 #endif
 285         es->top=es->bottom=0;
 286         }
 287
 288
 289 unsigned long ERR_get_error()
 290         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 291
 292 unsigned long ERR_get_error_line(file,line)
 293 char **file;
 294 int *line;
 295         { return(get_error_values(1,file,line,NULL,NULL)); }
 296
 297 unsigned long ERR_get_error_line_data(file,line,data,flags)
 298 char **file;
 299 int *line;
 300 char **data;
 301 int *flags;
 302         { return(get_error_values(1,file,line,data,flags)); }
 303
 304 unsigned long ERR_peek_error()
 305         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 306
 307 unsigned long ERR_peek_error_line(file,line)
 308 char **file;
 309 int *line;
 310         { return(get_error_values(0,file,line,NULL,NULL)); }
 311
 312 unsigned long ERR_peek_error_line_data(file,line,data,flags)
 313 char **file;
 314 int *line;
 315 char **data;
 316 int *flags;
 317         { return(get_error_values(0,file,line,data,flags)); }
 318
 319 static unsigned long get_error_values(inc,file,line,data,flags)
 320 int inc;
 321 char **file;
 322 int *line;
 323 char **data;
 324 int *flags;
 325         {
 326         int i=0;
 327         ERR_STATE *es;
 328         unsigned long ret;
 329
 330         es=ERR_get_state();
 331
 332         if (es->bottom == es->top) return(0);
 333         i=(es->bottom+1)%ERR_NUM_ERRORS;
 334
 335         ret=es->err_buffer[i];
 336         if (inc)
 337                 {
 338                 es->bottom=i;
 339                 es->err_buffer[i]=0;
 340                 }
 341
 342         if ((file != NULL) && (line != NULL))
 343                 {
 344                 if (es->err_file[i] == NULL)
 345                         {
 346                         *file="NA";
 347                         if (line != NULL) *line=0;
 348                         }
 349                 else
 350                         {
 351                         *file=es->err_file[i];
 352                         if (line != NULL) *line=es->err_line[i];
 353                         }
 354                 }
 355
 356         if (data != NULL)
 357                 {
 358                 if (es->err_data[i] == NULL)
 359                         {
 360                         *data="";
 361                         if (flags != NULL) *flags=0;
 362                         }
 363                 else
 364                         {
 365                         *data=es->err_data[i];
 366                         if (flags != NULL) *flags=es->err_data_flags[i];
 367                         }
 368                 }
 369         return(ret);
 370         }
 371
 372 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
 373 char *ERR_error_string(e,ret)
 374 unsigned long e;
 375 char *ret;
 376         {
 377         static char buf[256];
 378         char *ls,*fs,*rs;
 379         unsigned long l,f,r;
 380         int i;
 381
 382         l=ERR_GET_LIB(e);
 383         f=ERR_GET_FUNC(e);
 384         r=ERR_GET_REASON(e);
 385
 386         ls=ERR_lib_error_string(e);
 387         fs=ERR_func_error_string(e);
 388         rs=ERR_reason_error_string(e);
 389
 390         if (ret == NULL) ret=buf;
 391
 392         sprintf(&(ret[0]),"error:%08lX:",e);
 393         i=strlen(ret);
 394         if (ls == NULL)
 395                 sprintf(&(ret[i]),":lib(%lu) ",l);
 396         else    sprintf(&(ret[i]),"%s",ls);
 397         i=strlen(ret);
 398         if (fs == NULL)
 399                 sprintf(&(ret[i]),":func(%lu) ",f);
 400         else    sprintf(&(ret[i]),":%s",fs);
 401         i=strlen(ret);
 402         if (rs == NULL)
 403                 sprintf(&(ret[i]),":reason(%lu)",r);
 404         else    sprintf(&(ret[i]),":%s",rs);
 405
 406         return(ret);
 407         }
 408
 409 LHASH *ERR_get_string_table()
 410         {
 411         return(error_hash);
 412         }
 413
 414 LHASH *ERR_get_err_state_table()
 415         {
 416         return(thread_hash);
 417         }
 418
 419 char *ERR_lib_error_string(e)
 420 unsigned long e;
 421         {
 422         ERR_STRING_DATA d,*p=NULL;
 423         unsigned long l;
 424
 425         l=ERR_GET_LIB(e);
 426
 427         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 428
 429         if (error_hash != NULL)
 430                 {
 431                 d.error=ERR_PACK(l,0,0);
 432                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 433                 }
 434
 435         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 436
 437         return((p == NULL)?NULL:p->string);
 438         }
 439
 440 char *ERR_func_error_string(e)
 441 unsigned long e;
 442         {
 443         ERR_STRING_DATA d,*p=NULL;
 444         unsigned long l,f;
 445
 446         l=ERR_GET_LIB(e);
 447         f=ERR_GET_FUNC(e);
 448
 449         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 450
 451         if (error_hash != NULL)
 452                 {
 453                 d.error=ERR_PACK(l,f,0);
 454                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 455                 }
 456
 457         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 458
 459         return((p == NULL)?NULL:p->string);
 460         }
 461
 462 char *ERR_reason_error_string(e)
 463 unsigned long e;
 464         {
 465         ERR_STRING_DATA d,*p=NULL;
 466         unsigned long l,r;
 467
 468         l=ERR_GET_LIB(e);
 469         r=ERR_GET_REASON(e);
 470
 471         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 472
 473         if (error_hash != NULL)
 474                 {
 475                 d.error=ERR_PACK(l,0,r);
 476                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 477                 if (p == NULL)
 478                         {
 479                         d.error=ERR_PACK(0,0,r);
 480                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,
 481                                 (char *)&d);
 482                         }
 483                 }
 484
 485         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 486
 487         return((p == NULL)?NULL:p->string);
 488         }
 489
 490 static unsigned long err_hash(a)
 491 ERR_STRING_DATA *a;
 492         {
 493         unsigned long ret,l;
 494
 495         l=a->error;
 496         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 497         return(ret^ret%19*13);
 498         }
 499
 500 static int err_cmp(a,b)
 501 ERR_STRING_DATA *a,*b;
 502         {
 503         return((int)(a->error-b->error));
 504         }
 505
 506 static unsigned long pid_hash(a)
 507 ERR_STATE *a;
 508         {
 509         return(a->pid*13);
 510         }
 511
 512 static int pid_cmp(a,b)
 513 ERR_STATE *a,*b;
 514         {
 515         return((int)((long)a->pid - (long)b->pid));
 516         }
 517
 518 void ERR_remove_state(pid)
 519 unsigned long pid;
 520         {
 521         ERR_STATE *p,tmp;
 522
 523         if (thread_hash == NULL)
 524                 return;
 525         if (pid == 0)
 526                 pid=(unsigned long)CRYPTO_thread_id();
 527         tmp.pid=pid;
 528         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 529         p=(ERR_STATE *)lh_delete(thread_hash,(char *)&tmp);
 530         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 531
 532         if (p != NULL) ERR_STATE_free(p);
 533         }
 534
 535 ERR_STATE *ERR_get_state()
 536         {
 537         static ERR_STATE fallback;
 538         ERR_STATE *ret=NULL,tmp,*tmpp;
 539         int i;
 540         unsigned long pid;
 541
 542         pid=(unsigned long)CRYPTO_thread_id();
 543
 544         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 545         if (thread_hash == NULL)
 546                 {
 547                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 548                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 549                 if (thread_hash == NULL)
 550                         {
 551                         MemCheck_off();
 552                         thread_hash=lh_new(pid_hash,pid_cmp);
 553                         MemCheck_on();
 554                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 555                         if (thread_hash == NULL) return(&fallback);
 556                         }
 557                 else
 558                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 559                 }
 560         else
 561                 {
 562                 tmp.pid=pid;
 563                 ret=(ERR_STATE *)lh_retrieve(thread_hash,(char *)&tmp);
 564                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 565                 }
 566
 567         /* ret == the error state, if NULL, make a new one */
 568         if (ret == NULL)
 569                 {
 570                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 571                 if (ret == NULL) return(&fallback);
 572                 ret->pid=pid;
 573                 ret->top=0;
 574                 ret->bottom=0;
 575                 for (i=0; i<ERR_NUM_ERRORS; i++)
 576                         {
 577                         ret->err_data[i]=NULL;
 578                         ret->err_data_flags[i]=0;
 579                         }
 580                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 581                 tmpp=(ERR_STATE *)lh_insert(thread_hash,(char *)ret);
 582                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 583                 if (tmpp != NULL) /* old entry - should not happen */
 584                         {
 585                         ERR_STATE_free(tmpp);
 586                         }
 587                 }
 588         return(ret);
 589         }
 590
 591 int ERR_get_next_error_library()
 592         {
 593         static int value=ERR_LIB_USER;
 594
 595         return(value++);
 596         }
 597
 598 void ERR_set_error_data(data,flags)
 599 char *data;
 600 int flags;
 601         {
 602         ERR_STATE *es;
 603         int i;
 604
 605         es=ERR_get_state();
 606
 607         i=es->top;
 608         if (i == 0)
 609                 i=ERR_NUM_ERRORS-1;
 610
 611         es->err_data[i]=data;
 612         es->err_data_flags[es->top]=flags;
 613         }
 614
 615 void ERR_add_error_data( VAR_PLIST(int , num))
 616 VAR_ALIST
 617         {
 618         VAR_BDEFN(args, int, num);
 619         int i,n,s;
 620         char *str,*p,*a;
 621
 622         s=64;
 623         str=Malloc(s+1);
 624         if (str == NULL) return;
 625         str[0]='\0';
 626
 627         VAR_INIT(args,int,num);
 628         n=0;
 629         for (i=0; i<num; i++)
 630                 {
 631                 VAR_ARG(args,char *,a);
 632                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 633                 if (a != NULL)
 634                         {
 635                         n+=strlen(a);
 636                         if (n > s)
 637                                 {
 638                                 s=n+20;
 639                                 p=Realloc(str,s+1);
 640                                 if (p == NULL)
 641                                         {
 642                                         Free(str);
 643                                         return;
 644                                         }
 645                                 else
 646                                         str=p;
 647                                 }
 648                         strcat(str,a);
 649                         }
 650                 }
 651         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 652
 653         VAR_END( args );
 654         }
 655