crypto/err/err.c

   1 /* crypto/err/err.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111
 112 #include <stdio.h>
 113 #include <stdarg.h>
 114 #include <string.h>
 115 #include <openssl/lhash.h>
 116 #include <openssl/crypto.h>
 117 #include "cryptlib.h"
 118 #include <openssl/buffer.h>
 119 #include <openssl/err.h>
 120 #include <openssl/crypto.h>
 121
 122
 123 static LHASH *error_hash=NULL;
 124 static LHASH *thread_hash=NULL;
 125
 126 static unsigned long err_hash(ERR_STRING_DATA *a);
 127 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b);
 128 static unsigned long pid_hash(ERR_STATE *pid);
 129 static int pid_cmp(ERR_STATE *a,ERR_STATE *pid);
 130 static unsigned long get_error_values(int inc,const char **file,int *line,
 131                                       const char **data,int *flags);
 132 static void ERR_STATE_free(ERR_STATE *s);
 133 #ifndef NO_ERR
 134 static ERR_STRING_DATA ERR_str_libraries[]=
 135         {
 136 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
 137 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
 138 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
 139 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
 140 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
 141 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
 142 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
 143 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 144 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
 145 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
 146 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
 147 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
 148 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuration file routines"},
 149 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
 150 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
 151 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
 152 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
 153 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 154 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
 155 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
 156 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
 157 {ERR_PACK(ERR_LIB_RAND,0,0)             ,"random number generator"},
 158 {0,NULL},
 159         };
 160
 161 static ERR_STRING_DATA ERR_str_functs[]=
 162         {
 163         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 164         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 165         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 166         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 167         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 168         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 169         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 170         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 171 #ifdef WINDOWS
 172         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 173 #endif
 174         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
 175         {0,NULL},
 176         };
 177
 178 static ERR_STRING_DATA ERR_str_reasons[]=
 179         {
 180 {ERR_R_FATAL                             ,"fatal"},
 181 {ERR_R_SYS_LIB                          ,"system lib"},
 182 {ERR_R_BN_LIB                           ,"BN lib"},
 183 {ERR_R_RSA_LIB                          ,"RSA lib"},
 184 {ERR_R_DH_LIB                           ,"DH lib"},
 185 {ERR_R_EVP_LIB                          ,"EVP lib"},
 186 {ERR_R_BUF_LIB                          ,"BUF lib"},
 187 {ERR_R_BIO_LIB                          ,"BIO lib"},
 188 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 189 {ERR_R_PEM_LIB                          ,"PEM lib"},
 190 {ERR_R_X509_LIB                         ,"X509 lib"},
 191 {ERR_R_METH_LIB                         ,"METH lib"},
 192 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 193 {ERR_R_CONF_LIB                         ,"CONF lib"},
 194 {ERR_R_SSL_LIB                          ,"SSL lib"},
 195 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 196 {ERR_R_BIO_LIB                          ,"BIO lib"},
 197 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 198 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
 199 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 200 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
 201 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 202 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 203 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 204 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 205 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 206 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 207 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 208
 209 {0,NULL},
 210         };
 211
 212
 213 #define NUM_SYS_STR_REASONS 127
 214 #define LEN_SYS_STR_REASON 32
 215
 216 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 217 /* SYS_str_reasons is filled with copies of strerror() results at
 218  * initialization.
 219  * 'errno' values up to 127 should cover all usual errors,
 220  * others will be displayed numerically by ERR_error_string.
 221  * It is crucial that we have something for each reason code
 222  * that occurs in ERR_str_reasons, or bogus reason strings
 223  * will be returned for SYSerr(), which always gets an errno
 224  * value and never one of those 'standard' reason codes. */
 225
 226 static void build_SYS_str_reasons()
 227         {
 228         /* Malloc cannot be used here, use static storage instead */
 229         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 230         int i;
 231
 232         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 233
 234         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
 235                 {
 236                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 237
 238                 str->error = (unsigned long)i;
 239                 if (str->string == NULL)
 240                         {
 241                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 242                         char *src = strerror(i);
 243                         if (src != NULL)
 244                                 {
 245                                 strncpy(*dest, src, sizeof *dest);
 246                                 (*dest)[sizeof *dest - 1] = '\0';
 247                                 str->string = *dest;
 248                                 }
 249                         }
 250                 if (str->string == NULL)
 251                         str->string = "unknown";
 252                 }
 253
 254         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
 255          * as required by ERR_load_strings. */
 256
 257         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 258         }
 259 #endif
 260
 261 #define err_clear_data(p,i) \
 262         if (((p)->err_data[i] != NULL) && \
 263                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 264                 {  \
 265                 Free((p)->err_data[i]); \
 266                 (p)->err_data[i]=NULL; \
 267                 } \
 268         (p)->err_data_flags[i]=0;
 269
 270 static void ERR_STATE_free(ERR_STATE *s)
 271         {
 272         int i;
 273
 274         if(s == NULL)
 275             return;
 276
 277         for (i=0; i<ERR_NUM_ERRORS; i++)
 278                 {
 279                 err_clear_data(s,i);
 280                 }
 281         Free(s);
 282         }
 283
 284 void ERR_load_ERR_strings(void)
 285         {
 286         static int init=1;
 287
 288         if (init)
 289                 {
 290                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 291                 if (init == 0)
 292                         {
 293                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 294                         return;
 295                         }
 296                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 297
 298 #ifndef NO_ERR
 299                 ERR_load_strings(0,ERR_str_libraries);
 300                 ERR_load_strings(0,ERR_str_reasons);
 301                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 302                 build_SYS_str_reasons();
 303                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
 304 #endif
 305                 init=0;
 306                 }
 307         }
 308
 309 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 310         {
 311         if (error_hash == NULL)
 312                 {
 313                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 314                 error_hash=lh_new(err_hash,err_cmp);
 315                 if (error_hash == NULL)
 316                         {
 317                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 318                         return;
 319                         }
 320                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 321
 322                 ERR_load_ERR_strings();
 323                 }
 324
 325         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 326         while (str->error)
 327                 {
 328                 str->error|=ERR_PACK(lib,0,0);
 329                 lh_insert(error_hash,str);
 330                 str++;
 331                 }
 332         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 333         }
 334
 335 void ERR_free_strings(void)
 336         {
 337         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 338
 339         if (error_hash != NULL)
 340                 {
 341                 lh_free(error_hash);
 342                 error_hash=NULL;
 343                 }
 344
 345         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 346         }
 347
 348 /********************************************************/
 349
 350 void ERR_put_error(int lib, int func, int reason, const char *file,
 351              int line)
 352         {
 353         ERR_STATE *es;
 354
 355 #ifdef _OSD_POSIX
 356         /* In the BS2000-OSD POSIX subsystem, the compiler generates
 357          * path names in the form "*POSIX(/etc/passwd)".
 358          * This dirty hack strips them to something sensible.
 359          * @@@ We shouldn't modify a const string, though.
 360          */
 361         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
 362                 char *end;
 363
 364                 /* Skip the "*POSIX(" prefix */
 365                 file += sizeof("*POSIX(")-1;
 366                 end = &file[strlen(file)-1];
 367                 if (*end == ')')
 368                         *end = '\0';
 369                 /* Optional: use the basename of the path only. */
 370                 if ((end = strrchr(file, '/')) != NULL)
 371                         file = &end[1];
 372         }
 373 #endif
 374         es=ERR_get_state();
 375
 376         es->top=(es->top+1)%ERR_NUM_ERRORS;
 377         if (es->top == es->bottom)
 378                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 379         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 380         es->err_file[es->top]=file;
 381         es->err_line[es->top]=line;
 382         err_clear_data(es,es->top);
 383         }
 384
 385 void ERR_clear_error(void)
 386         {
 387         ERR_STATE *es;
 388
 389         es=ERR_get_state();
 390
 391 #if 0
 392         /* hmm... is this needed */
 393         for (i=0; i<ERR_NUM_ERRORS; i++)
 394                 {
 395                 es->err_buffer[i]=0;
 396                 es->err_file[i]=NULL;
 397                 es->err_line[i]= -1;
 398                 err_clear_data(es,i);
 399                 }
 400 #endif
 401         es->top=es->bottom=0;
 402         }
 403
 404
 405 unsigned long ERR_get_error(void)
 406         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 407
 408 unsigned long ERR_get_error_line(const char **file,
 409              int *line)
 410         { return(get_error_values(1,file,line,NULL,NULL)); }
 411
 412 unsigned long ERR_get_error_line_data(const char **file, int *line,
 413              const char **data, int *flags)
 414         { return(get_error_values(1,file,line,
 415              data,flags)); }
 416
 417 unsigned long ERR_peek_error(void)
 418         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 419
 420 unsigned long ERR_peek_error_line(const char **file,
 421              int *line)
 422         { return(get_error_values(0,file,line,NULL,NULL)); }
 423
 424 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 425              const char **data, int *flags)
 426         { return(get_error_values(0,file,line,
 427              data,flags)); }
 428
 429 static unsigned long get_error_values(int inc, const char **file, int *line,
 430              const char **data, int *flags)
 431         {
 432         int i=0;
 433         ERR_STATE *es;
 434         unsigned long ret;
 435
 436         es=ERR_get_state();
 437
 438         if (es->bottom == es->top) return(0);
 439         i=(es->bottom+1)%ERR_NUM_ERRORS;
 440
 441         ret=es->err_buffer[i];
 442         if (inc)
 443                 {
 444                 es->bottom=i;
 445                 es->err_buffer[i]=0;
 446                 }
 447
 448         if ((file != NULL) && (line != NULL))
 449                 {
 450                 if (es->err_file[i] == NULL)
 451                         {
 452                         *file="NA";
 453                         if (line != NULL) *line=0;
 454                         }
 455                 else
 456                         {
 457                         *file=es->err_file[i];
 458                         if (line != NULL) *line=es->err_line[i];
 459                         }
 460                 }
 461
 462         if (data != NULL)
 463                 {
 464                 if (es->err_data[i] == NULL)
 465                         {
 466                         *data="";
 467                         if (flags != NULL) *flags=0;
 468                         }
 469                 else
 470                         {
 471                         *data=es->err_data[i];
 472                         if (flags != NULL) *flags=es->err_data_flags[i];
 473                         }
 474                 }
 475         return(ret);
 476         }
 477
 478 /* BAD for multi-threaded, uses a local buffer if ret == NULL */
 479 char *ERR_error_string(unsigned long e, char *ret)
 480         {
 481         static char buf[256];
 482         const char *ls,*fs,*rs;
 483         unsigned long l,f,r;
 484         int i;
 485
 486         l=ERR_GET_LIB(e);
 487         f=ERR_GET_FUNC(e);
 488         r=ERR_GET_REASON(e);
 489
 490         ls=ERR_lib_error_string(e);
 491         fs=ERR_func_error_string(e);
 492         rs=ERR_reason_error_string(e);
 493
 494         if (ret == NULL) ret=buf;
 495
 496         sprintf(&(ret[0]),"error:%08lX:",e);
 497         i=strlen(ret);
 498         if (ls == NULL)
 499                 sprintf(&(ret[i]),":lib(%lu) ",l);
 500         else    sprintf(&(ret[i]),"%s",ls);
 501         i=strlen(ret);
 502         if (fs == NULL)
 503                 sprintf(&(ret[i]),":func(%lu) ",f);
 504         else    sprintf(&(ret[i]),":%s",fs);
 505         i=strlen(ret);
 506         if (rs == NULL)
 507                 sprintf(&(ret[i]),":reason(%lu)",r);
 508         else    sprintf(&(ret[i]),":%s",rs);
 509
 510         return(ret);
 511         }
 512
 513 LHASH *ERR_get_string_table(void)
 514         {
 515         return(error_hash);
 516         }
 517
 518 LHASH *ERR_get_err_state_table(void)
 519         {
 520         return(thread_hash);
 521         }
 522
 523 const char *ERR_lib_error_string(unsigned long e)
 524         {
 525         ERR_STRING_DATA d,*p=NULL;
 526         unsigned long l;
 527
 528         l=ERR_GET_LIB(e);
 529
 530         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 531
 532         if (error_hash != NULL)
 533                 {
 534                 d.error=ERR_PACK(l,0,0);
 535                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 536                 }
 537
 538         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 539
 540         return((p == NULL)?NULL:p->string);
 541         }
 542
 543 const char *ERR_func_error_string(unsigned long e)
 544         {
 545         ERR_STRING_DATA d,*p=NULL;
 546         unsigned long l,f;
 547
 548         l=ERR_GET_LIB(e);
 549         f=ERR_GET_FUNC(e);
 550
 551         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 552
 553         if (error_hash != NULL)
 554                 {
 555                 d.error=ERR_PACK(l,f,0);
 556                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 557                 }
 558
 559         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 560
 561         return((p == NULL)?NULL:p->string);
 562         }
 563
 564 const char *ERR_reason_error_string(unsigned long e)
 565         {
 566         ERR_STRING_DATA d,*p=NULL;
 567         unsigned long l,r;
 568
 569         l=ERR_GET_LIB(e);
 570         r=ERR_GET_REASON(e);
 571
 572         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 573
 574         if (error_hash != NULL)
 575                 {
 576                 d.error=ERR_PACK(l,0,r);
 577                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 578                 if (p == NULL)
 579                         {
 580                         d.error=ERR_PACK(0,0,r);
 581                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 582                         }
 583                 }
 584
 585         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 586
 587         return((p == NULL)?NULL:p->string);
 588         }
 589
 590 static unsigned long err_hash(ERR_STRING_DATA *a)
 591         {
 592         unsigned long ret,l;
 593
 594         l=a->error;
 595         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 596         return(ret^ret%19*13);
 597         }
 598
 599 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
 600         {
 601         return((int)(a->error-b->error));
 602         }
 603
 604 static unsigned long pid_hash(ERR_STATE *a)
 605         {
 606         return(a->pid*13);
 607         }
 608
 609 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
 610         {
 611         return((int)((long)a->pid - (long)b->pid));
 612         }
 613
 614 void ERR_remove_state(unsigned long pid)
 615         {
 616         ERR_STATE *p,tmp;
 617
 618         if (thread_hash == NULL)
 619                 return;
 620         if (pid == 0)
 621                 pid=(unsigned long)CRYPTO_thread_id();
 622         tmp.pid=pid;
 623         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 624         p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
 625         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 626
 627         if (p != NULL) ERR_STATE_free(p);
 628         }
 629
 630 ERR_STATE *ERR_get_state(void)
 631         {
 632         static ERR_STATE fallback;
 633         ERR_STATE *ret=NULL,tmp,*tmpp;
 634         int i;
 635         unsigned long pid;
 636
 637         pid=(unsigned long)CRYPTO_thread_id();
 638
 639         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 640         if (thread_hash == NULL)
 641                 {
 642                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 643                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 644                 if (thread_hash == NULL)
 645                         {
 646                         MemCheck_off();
 647                         thread_hash=lh_new(pid_hash,pid_cmp);
 648                         MemCheck_on();
 649                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 650                         if (thread_hash == NULL) return(&fallback);
 651                         }
 652                 else
 653                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 654                 }
 655         else
 656                 {
 657                 tmp.pid=pid;
 658                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
 659                 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 660                 }
 661
 662         /* ret == the error state, if NULL, make a new one */
 663         if (ret == NULL)
 664                 {
 665                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 666                 if (ret == NULL) return(&fallback);
 667                 ret->pid=pid;
 668                 ret->top=0;
 669                 ret->bottom=0;
 670                 for (i=0; i<ERR_NUM_ERRORS; i++)
 671                         {
 672                         ret->err_data[i]=NULL;
 673                         ret->err_data_flags[i]=0;
 674                         }
 675                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 676                 tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
 677                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 678                 if (tmpp != NULL) /* old entry - should not happen */
 679                         {
 680                         ERR_STATE_free(tmpp);
 681                         }
 682                 }
 683         return(ret);
 684         }
 685
 686 int ERR_get_next_error_library(void)
 687         {
 688         static int value=ERR_LIB_USER;
 689
 690         return(value++);
 691         }
 692
 693 void ERR_set_error_data(char *data, int flags)
 694         {
 695         ERR_STATE *es;
 696         int i;
 697
 698         es=ERR_get_state();
 699
 700         i=es->top;
 701         if (i == 0)
 702                 i=ERR_NUM_ERRORS-1;
 703
 704         es->err_data[i]=data;
 705         es->err_data_flags[es->top]=flags;
 706         }
 707
 708 void ERR_add_error_data(int num, ...)
 709         {
 710         va_list args;
 711         int i,n,s;
 712         char *str,*p,*a;
 713
 714         s=64;
 715         str=Malloc(s+1);
 716         if (str == NULL) return;
 717         str[0]='\0';
 718
 719         va_start(args, num);
 720         n=0;
 721         for (i=0; i<num; i++)
 722                 {
 723                 a=va_arg(args, char*);
 724                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 725                 if (a != NULL)
 726                         {
 727                         n+=strlen(a);
 728                         if (n > s)
 729                                 {
 730                                 s=n+20;
 731                                 p=Realloc(str,s+1);
 732                                 if (p == NULL)
 733                                         {
 734                                         Free(str);
 735                                         return;
 736                                         }
 737                                 else
 738                                         str=p;
 739                                 }
 740                         strcat(str,a);
 741                         }
 742                 }
 743         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 744
 745         va_end(args);
 746         }
 747