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         if(s == NULL)
 179             return;
 180
 181         for (i=0; i<ERR_NUM_ERRORS; i++)
 182                 {
 183                 err_clear_data(s,i);
 184                 }
 185         Free(s);
 186         }
 187
 188 void ERR_load_ERR_strings()
 189         {
 190         static int init=1;
 191
 192         if (init)
 193                 {
 194                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 195                 if (init == 0)
 196                         {
 197                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 198                         return;
 199                         }
 200                 init=0;
 201                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 202
 203 #ifndef NO_ERR
 204                 ERR_load_strings(0,ERR_str_libraries);
 205                 ERR_load_strings(0,ERR_str_reasons);
 206                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 207 #endif
 208                 }
 209         }
 210
 211 void ERR_load_strings(lib,str)
 212 int lib;
 213 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()
 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(lib,func,reason,file,line)
 255 int lib,func,reason;
 256 char *file;
 257 int line;
 258         {
 259         ERR_STATE *es;
 260
 261         es=ERR_get_state();
 262
 263         es->top=(es->top+1)%ERR_NUM_ERRORS;
 264         if (es->top == es->bottom)
 265                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 266         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 267         es->err_file[es->top]=file;
 268         es->err_line[es->top]=line;
 269         err_clear_data(es,es->top);
 270         }
 271
 272 void ERR_clear_error()
 273         {
 274         ERR_STATE *es;
 275
 276         es=ERR_get_state();
 277
 278 #if 0
 279         /* hmm... is this needed */
 280         for (i=0; i<ERR_NUM_ERRORS; i++)
 281                 {
 282                 es->err_buffer[i]=0;
 283                 es->err_file[i]=NULL;
 284                 es->err_line[i]= -1;
 285                 err_clear_data(es,i);
 286                 }
 287 #endif
 288         es->top=es->bottom=0;
 289         }
 290
 291
 292 unsigned long ERR_get_error()
 293         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 294
 295 unsigned long ERR_get_error_line(file,line)
 296 char **file;
 297 int *line;
 298         { return(get_error_values(1,file,line,NULL,NULL)); }
 299
 300 unsigned long ERR_get_error_line_data(file,line,data,flags)
 301 char **file;
 302 int *line;
 303 char **data;
 304 int *flags;
 305         { return(get_error_values(1,file,line,data,flags)); }
 306
 307 unsigned long ERR_peek_error()
 308         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 309
 310 unsigned long ERR_peek_error_line(file,line)
 311 char **file;
 312 int *line;
 313         { return(get_error_values(0,file,line,NULL,NULL)); }
 314
 315 unsigned long ERR_peek_error_line_data(file,line,data,flags)
 316 char **file;
 317 int *line;
 318 char **data;
 319 int *flags;
 320         { return(get_error_values(0,file,line,data,flags)); }
 321
 322 static unsigned long get_error_values(inc,file,line,data,flags)
 323 int inc;
 324 char **file;
 325 int *line;
 326 char **data;
 327 int *flags;
 328         {
 329         int i=0;
 330         ERR_STATE *es;
 331         unsigned long ret;
 332
 333         es=ERR_get_state();
 334
 335         if (es->bottom == es->top) return(0);
 336         i=(es->bottom+1)%ERR_NUM_ERRORS;
 337
 338         ret=es->err_buffer[i];
 339         if (inc)
 340                 {
 341                 es->bottom=i;
 342                 es->err_buffer[i]=0;
 343                 }
 344
 345         if ((file != NULL) && (line != NULL))
 346                 {
 347                 if (es->err_file[i] == NULL)
 348                         {
 349                         *file="NA";
 350                         if (line != NULL) *line=0;
 351                         }
 352                 else
 353                         {
 354                         *file=es->err_file[i];
 355                         if (line != NULL) *line=es->err_line[i];
 356                         }
 357                 }
 358
 359         if (data != NULL)
 360                 {
 361                 if (es->err_data[i] == NULL)
 362                         {
 363                         *data="";
 364                         if (flags != NULL) *flags=0;
 365                         }
 366                 else
 367                         {
 368                         *data=es->err_data[i];
 369                         if (flags != NULL) *flags=es->err_data_flags[i];
 370                         }
 371                 }
 372         return(ret);
 373         }
 374
 375 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
 376 char *ERR_error_string(e,ret)
 377 unsigned long e;
 378 char *ret;
 379         {
 380         static char buf[256];
 381         char *ls,*fs,*rs;
 382         unsigned long l,f,r;
 383         int i;
 384
 385         l=ERR_GET_LIB(e);
 386         f=ERR_GET_FUNC(e);
 387         r=ERR_GET_REASON(e);
 388
 389         ls=ERR_lib_error_string(e);
 390         fs=ERR_func_error_string(e);
 391         rs=ERR_reason_error_string(e);
 392
 393         if (ret == NULL) ret=buf;
 394
 395         sprintf(&(ret[0]),"error:%08lX:",e);
 396         i=strlen(ret);
 397         if (ls == NULL)
 398                 sprintf(&(ret[i]),":lib(%lu) ",l);
 399         else    sprintf(&(ret[i]),"%s",ls);
 400         i=strlen(ret);
 401         if (fs == NULL)
 402                 sprintf(&(ret[i]),":func(%lu) ",f);
 403         else    sprintf(&(ret[i]),":%s",fs);
 404         i=strlen(ret);
 405         if (rs == NULL)
 406                 sprintf(&(ret[i]),":reason(%lu)",r);
 407         else    sprintf(&(ret[i]),":%s",rs);
 408
 409         return(ret);
 410         }
 411
 412 LHASH *ERR_get_string_table()
 413         {
 414         return(error_hash);
 415         }
 416
 417 LHASH *ERR_get_err_state_table()
 418         {
 419         return(thread_hash);
 420         }
 421
 422 char *ERR_lib_error_string(e)
 423 unsigned long e;
 424         {
 425         ERR_STRING_DATA d,*p=NULL;
 426         unsigned long l;
 427
 428         l=ERR_GET_LIB(e);
 429
 430         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 431
 432         if (error_hash != NULL)
 433                 {
 434                 d.error=ERR_PACK(l,0,0);
 435                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 436                 }
 437
 438         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 439
 440         return((p == NULL)?NULL:p->string);
 441         }
 442
 443 char *ERR_func_error_string(e)
 444 unsigned long e;
 445         {
 446         ERR_STRING_DATA d,*p=NULL;
 447         unsigned long l,f;
 448
 449         l=ERR_GET_LIB(e);
 450         f=ERR_GET_FUNC(e);
 451
 452         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 453
 454         if (error_hash != NULL)
 455                 {
 456                 d.error=ERR_PACK(l,f,0);
 457                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 458                 }
 459
 460         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 461
 462         return((p == NULL)?NULL:p->string);
 463         }
 464
 465 char *ERR_reason_error_string(e)
 466 unsigned long e;
 467         {
 468         ERR_STRING_DATA d,*p=NULL;
 469         unsigned long l,r;
 470
 471         l=ERR_GET_LIB(e);
 472         r=ERR_GET_REASON(e);
 473
 474         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 475
 476         if (error_hash != NULL)
 477                 {
 478                 d.error=ERR_PACK(l,0,r);
 479                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,(char *)&d);
 480                 if (p == NULL)
 481                         {
 482                         d.error=ERR_PACK(0,0,r);
 483                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,
 484                                 (char *)&d);
 485                         }
 486                 }
 487
 488         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 489
 490         return((p == NULL)?NULL:p->string);
 491         }
 492
 493 static unsigned long err_hash(a)
 494 ERR_STRING_DATA *a;
 495         {
 496         unsigned long ret,l;
 497
 498         l=a->error;
 499         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 500         return(ret^ret%19*13);
 501         }
 502
 503 static int err_cmp(a,b)
 504 ERR_STRING_DATA *a,*b;
 505         {
 506         return((int)(a->error-b->error));
 507         }
 508
 509 static unsigned long pid_hash(a)
 510 ERR_STATE *a;
 511         {
 512         return(a->pid*13);
 513         }
 514
 515 static int pid_cmp(a,b)
 516 ERR_STATE *a,*b;
 517         {
 518         return((int)((long)a->pid - (long)b->pid));
 519         }
 520
 521 void ERR_remove_state(pid)
 522 unsigned long pid;
 523         {
 524         ERR_STATE *p,tmp;
 525
 526         if (thread_hash == NULL)
 527                 return;
 528         if (pid == 0)
 529                 pid=(unsigned long)CRYPTO_thread_id();
 530         tmp.pid=pid;
 531         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 532         p=(ERR_STATE *)lh_delete(thread_hash,(char *)&tmp);
 533         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 534
 535         if (p != NULL) ERR_STATE_free(p);
 536         }
 537
 538 ERR_STATE *ERR_get_state()
 539         {
 540         static ERR_STATE fallback;
 541         ERR_STATE *ret=NULL,tmp,*tmpp;
 542         int i;
 543         unsigned long pid;
 544
 545         pid=(unsigned long)CRYPTO_thread_id();
 546
 547         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 548         if (thread_hash == NULL)
 549                 {
 550                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 551                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 552                 if (thread_hash == NULL)
 553                         {
 554                         MemCheck_off();
 555                         thread_hash=lh_new(pid_hash,pid_cmp);
 556                         MemCheck_on();
 557                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 558                         if (thread_hash == NULL) return(&fallback);
 559                         }
 560                 else
 561                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 562                 }
 563         else
 564                 {
 565                 tmp.pid=pid;
 566                 ret=(ERR_STATE *)lh_retrieve(thread_hash,(char *)&tmp);
 567                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 568                 }
 569
 570         /* ret == the error state, if NULL, make a new one */
 571         if (ret == NULL)
 572                 {
 573                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 574                 if (ret == NULL) return(&fallback);
 575                 ret->pid=pid;
 576                 ret->top=0;
 577                 ret->bottom=0;
 578                 for (i=0; i<ERR_NUM_ERRORS; i++)
 579                         {
 580                         ret->err_data[i]=NULL;
 581                         ret->err_data_flags[i]=0;
 582                         }
 583                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 584                 tmpp=(ERR_STATE *)lh_insert(thread_hash,(char *)ret);
 585                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 586                 if (tmpp != NULL) /* old entry - should not happen */
 587                         {
 588                         ERR_STATE_free(tmpp);
 589                         }
 590                 }
 591         return(ret);
 592         }
 593
 594 int ERR_get_next_error_library()
 595         {
 596         static int value=ERR_LIB_USER;
 597
 598         return(value++);
 599         }
 600
 601 void ERR_set_error_data(data,flags)
 602 char *data;
 603 int flags;
 604         {
 605         ERR_STATE *es;
 606         int i;
 607
 608         es=ERR_get_state();
 609
 610         i=es->top;
 611         if (i == 0)
 612                 i=ERR_NUM_ERRORS-1;
 613
 614         es->err_data[i]=data;
 615         es->err_data_flags[es->top]=flags;
 616         }
 617
 618 void ERR_add_error_data( VAR_PLIST(int , num))
 619 VAR_ALIST
 620         {
 621         VAR_BDEFN(args, int, num);
 622         int i,n,s;
 623         char *str,*p,*a;
 624
 625         s=64;
 626         str=Malloc(s+1);
 627         if (str == NULL) return;
 628         str[0]='\0';
 629
 630         VAR_INIT(args,int,num);
 631         n=0;
 632         for (i=0; i<num; i++)
 633                 {
 634                 VAR_ARG(args,char *,a);
 635                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 636                 if (a != NULL)
 637                         {
 638                         n+=strlen(a);
 639                         if (n > s)
 640                                 {
 641                                 s=n+20;
 642                                 p=Realloc(str,s+1);
 643                                 if (p == NULL)
 644                                         {
 645                                         Free(str);
 646                                         return;
 647                                         }
 648                                 else
 649                                         str=p;
 650                                 }
 651                         strcat(str,a);
 652                         }
 653                 }
 654         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 655
 656         VAR_END( args );
 657         }
 658