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/bio.h>
 120 #include <openssl/err.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 {ERR_PACK(ERR_LIB_DSO,0,0)              ,"DSO support routines"},
 159 {0,NULL},
 160         };
 161
 162 static ERR_STRING_DATA ERR_str_functs[]=
 163         {
 164         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 165         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 166         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 167         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 168         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 169         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 170         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 171         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 172 #ifdef WINDOWS
 173         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 174 #endif
 175         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
 176         {0,NULL},
 177         };
 178
 179 static ERR_STRING_DATA ERR_str_reasons[]=
 180         {
 181 {ERR_R_FATAL                             ,"fatal"},
 182 {ERR_R_SYS_LIB                          ,"system lib"},
 183 {ERR_R_BN_LIB                           ,"BN lib"},
 184 {ERR_R_RSA_LIB                          ,"RSA lib"},
 185 {ERR_R_DH_LIB                           ,"DH lib"},
 186 {ERR_R_EVP_LIB                          ,"EVP lib"},
 187 {ERR_R_BUF_LIB                          ,"BUF lib"},
 188 {ERR_R_BIO_LIB                          ,"BIO lib"},
 189 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 190 {ERR_R_PEM_LIB                          ,"PEM lib"},
 191 {ERR_R_X509_LIB                         ,"X509 lib"},
 192 {ERR_R_METH_LIB                         ,"METH lib"},
 193 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 194 {ERR_R_CONF_LIB                         ,"CONF lib"},
 195 {ERR_R_SSL_LIB                          ,"SSL lib"},
 196 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 197 {ERR_R_BIO_LIB                          ,"BIO lib"},
 198 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 199 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
 200 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 201 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
 202 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 203 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 204 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 205 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 206 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 207 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 208 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 209 {ERR_R_DSO_LIB                          ,"DSO lib"},
 210
 211 {0,NULL},
 212         };
 213
 214
 215 #define NUM_SYS_STR_REASONS 127
 216 #define LEN_SYS_STR_REASON 32
 217
 218 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 219 /* SYS_str_reasons is filled with copies of strerror() results at
 220  * initialization.
 221  * 'errno' values up to 127 should cover all usual errors,
 222  * others will be displayed numerically by ERR_error_string.
 223  * It is crucial that we have something for each reason code
 224  * that occurs in ERR_str_reasons, or bogus reason strings
 225  * will be returned for SYSerr(), which always gets an errno
 226  * value and never one of those 'standard' reason codes. */
 227
 228 static void build_SYS_str_reasons()
 229         {
 230         /* Malloc cannot be used here, use static storage instead */
 231         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 232         int i;
 233
 234         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 235
 236         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
 237                 {
 238                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 239
 240                 str->error = (unsigned long)i;
 241                 if (str->string == NULL)
 242                         {
 243                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 244                         char *src = strerror(i);
 245                         if (src != NULL)
 246                                 {
 247                                 strncpy(*dest, src, sizeof *dest);
 248                                 (*dest)[sizeof *dest - 1] = '\0';
 249                                 str->string = *dest;
 250                                 }
 251                         }
 252                 if (str->string == NULL)
 253                         str->string = "unknown";
 254                 }
 255
 256         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
 257          * as required by ERR_load_strings. */
 258
 259         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 260         }
 261 #endif
 262
 263 #define err_clear_data(p,i) \
 264         if (((p)->err_data[i] != NULL) && \
 265                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 266                 {  \
 267                 Free((p)->err_data[i]); \
 268                 (p)->err_data[i]=NULL; \
 269                 } \
 270         (p)->err_data_flags[i]=0;
 271
 272 static void ERR_STATE_free(ERR_STATE *s)
 273         {
 274         int i;
 275
 276         if(s == NULL)
 277             return;
 278
 279         for (i=0; i<ERR_NUM_ERRORS; i++)
 280                 {
 281                 err_clear_data(s,i);
 282                 }
 283         Free(s);
 284         }
 285
 286 void ERR_load_ERR_strings(void)
 287         {
 288         static int init=1;
 289
 290         if (init)
 291                 {
 292                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 293                 if (init == 0)
 294                         {
 295                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 296                         return;
 297                         }
 298                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 299
 300 #ifndef NO_ERR
 301                 ERR_load_strings(0,ERR_str_libraries);
 302                 ERR_load_strings(0,ERR_str_reasons);
 303                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 304                 build_SYS_str_reasons();
 305                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
 306 #endif
 307                 init=0;
 308                 }
 309         }
 310
 311 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 312         {
 313         if (error_hash == NULL)
 314                 {
 315                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 316                 error_hash=lh_new(err_hash,err_cmp);
 317                 if (error_hash == NULL)
 318                         {
 319                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 320                         return;
 321                         }
 322                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 323
 324                 ERR_load_ERR_strings();
 325                 }
 326
 327         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 328         while (str->error)
 329                 {
 330                 str->error|=ERR_PACK(lib,0,0);
 331                 lh_insert(error_hash,str);
 332                 str++;
 333                 }
 334         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 335         }
 336
 337 void ERR_free_strings(void)
 338         {
 339         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 340
 341         if (error_hash != NULL)
 342                 {
 343                 lh_free(error_hash);
 344                 error_hash=NULL;
 345                 }
 346
 347         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 348         }
 349
 350 /********************************************************/
 351
 352 void ERR_put_error(int lib, int func, int reason, const char *file,
 353              int line)
 354         {
 355         ERR_STATE *es;
 356
 357 #ifdef _OSD_POSIX
 358         /* In the BS2000-OSD POSIX subsystem, the compiler generates
 359          * path names in the form "*POSIX(/etc/passwd)".
 360          * This dirty hack strips them to something sensible.
 361          * @@@ We shouldn't modify a const string, though.
 362          */
 363         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
 364                 char *end;
 365
 366                 /* Skip the "*POSIX(" prefix */
 367                 file += sizeof("*POSIX(")-1;
 368                 end = &file[strlen(file)-1];
 369                 if (*end == ')')
 370                         *end = '\0';
 371                 /* Optional: use the basename of the path only. */
 372                 if ((end = strrchr(file, '/')) != NULL)
 373                         file = &end[1];
 374         }
 375 #endif
 376         es=ERR_get_state();
 377
 378         es->top=(es->top+1)%ERR_NUM_ERRORS;
 379         if (es->top == es->bottom)
 380                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 381         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 382         es->err_file[es->top]=file;
 383         es->err_line[es->top]=line;
 384         err_clear_data(es,es->top);
 385         }
 386
 387 void ERR_clear_error(void)
 388         {
 389         ERR_STATE *es;
 390
 391         es=ERR_get_state();
 392
 393 #if 0
 394         /* hmm... is this needed */
 395         for (i=0; i<ERR_NUM_ERRORS; i++)
 396                 {
 397                 es->err_buffer[i]=0;
 398                 es->err_file[i]=NULL;
 399                 es->err_line[i]= -1;
 400                 err_clear_data(es,i);
 401                 }
 402 #endif
 403         es->top=es->bottom=0;
 404         }
 405
 406
 407 unsigned long ERR_get_error(void)
 408         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 409
 410 unsigned long ERR_get_error_line(const char **file,
 411              int *line)
 412         { return(get_error_values(1,file,line,NULL,NULL)); }
 413
 414 unsigned long ERR_get_error_line_data(const char **file, int *line,
 415              const char **data, int *flags)
 416         { return(get_error_values(1,file,line,
 417              data,flags)); }
 418
 419 unsigned long ERR_peek_error(void)
 420         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 421
 422 unsigned long ERR_peek_error_line(const char **file,
 423              int *line)
 424         { return(get_error_values(0,file,line,NULL,NULL)); }
 425
 426 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 427              const char **data, int *flags)
 428         { return(get_error_values(0,file,line,
 429              data,flags)); }
 430
 431 static unsigned long get_error_values(int inc, const char **file, int *line,
 432              const char **data, int *flags)
 433         {
 434         int i=0;
 435         ERR_STATE *es;
 436         unsigned long ret;
 437
 438         es=ERR_get_state();
 439
 440         if (es->bottom == es->top) return(0);
 441         i=(es->bottom+1)%ERR_NUM_ERRORS;
 442
 443         ret=es->err_buffer[i];
 444         if (inc)
 445                 {
 446                 es->bottom=i;
 447                 es->err_buffer[i]=0;
 448                 }
 449
 450         if ((file != NULL) && (line != NULL))
 451                 {
 452                 if (es->err_file[i] == NULL)
 453                         {
 454                         *file="NA";
 455                         if (line != NULL) *line=0;
 456                         }
 457                 else
 458                         {
 459                         *file=es->err_file[i];
 460                         if (line != NULL) *line=es->err_line[i];
 461                         }
 462                 }
 463
 464         if (data != NULL)
 465                 {
 466                 if (es->err_data[i] == NULL)
 467                         {
 468                         *data="";
 469                         if (flags != NULL) *flags=0;
 470                         }
 471                 else
 472                         {
 473                         *data=es->err_data[i];
 474                         if (flags != NULL) *flags=es->err_data_flags[i];
 475                         }
 476                 }
 477         return(ret);
 478         }
 479
 480 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 481         {
 482         char lsbuf[64], fsbuf[64], rsbuf[64];
 483         const char *ls,*fs,*rs;
 484         unsigned long l,f,r;
 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 (ls == NULL)
 495                 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 496         if (fs == NULL)
 497                 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 498         if (rs == NULL)
 499                 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 500
 501         BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf,
 502                 fs?fs:fsbuf, rs?rs:rsbuf);
 503         if (strlen(buf) == len-1)
 504                 {
 505                 /* output may be truncated; make sure we always have 5
 506                  * colon-separated fields, i.e. 4 colons ... */
 507 #define NUM_COLONS 4
 508                 if (len > NUM_COLONS) /* ... if possible */
 509                         {
 510                         int i;
 511                         char *s = buf;
 512
 513                         for (i = 0; i < NUM_COLONS; i++)
 514                                 {
 515                                 char *colon = strchr(s, ':');
 516                                 if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
 517                                         {
 518                                         /* set colon no. i at last possible position
 519                                          * (buf[len-1] is the terminating 0)*/
 520                                         colon = &buf[len-1] - NUM_COLONS + i;
 521                                         *colon = ':';
 522                                         }
 523                                 s = colon + 1;
 524                                 }
 525                         }
 526                 }
 527         }
 528
 529 /* BAD for multi-threading: uses a local buffer if ret == NULL */
 530 /* ERR_error_string_n should be used instead for ret != NULL
 531  * as ERR_error_string cannot know how large the buffer is */
 532 char *ERR_error_string(unsigned long e, char *ret)
 533         {
 534         static char buf[256];
 535
 536         if (ret == NULL) ret=buf;
 537         ERR_error_string_n(e, buf, 256);
 538
 539         return(ret);
 540         }
 541
 542 LHASH *ERR_get_string_table(void)
 543         {
 544         return(error_hash);
 545         }
 546
 547 /* not thread-safe */
 548 LHASH *ERR_get_err_state_table(void)
 549         {
 550         return(thread_hash);
 551         }
 552
 553 const char *ERR_lib_error_string(unsigned long e)
 554         {
 555         ERR_STRING_DATA d,*p=NULL;
 556         unsigned long l;
 557
 558         l=ERR_GET_LIB(e);
 559
 560         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 561
 562         if (error_hash != NULL)
 563                 {
 564                 d.error=ERR_PACK(l,0,0);
 565                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 566                 }
 567
 568         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 569
 570         return((p == NULL)?NULL:p->string);
 571         }
 572
 573 const char *ERR_func_error_string(unsigned long e)
 574         {
 575         ERR_STRING_DATA d,*p=NULL;
 576         unsigned long l,f;
 577
 578         l=ERR_GET_LIB(e);
 579         f=ERR_GET_FUNC(e);
 580
 581         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 582
 583         if (error_hash != NULL)
 584                 {
 585                 d.error=ERR_PACK(l,f,0);
 586                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 587                 }
 588
 589         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 590
 591         return((p == NULL)?NULL:p->string);
 592         }
 593
 594 const char *ERR_reason_error_string(unsigned long e)
 595         {
 596         ERR_STRING_DATA d,*p=NULL;
 597         unsigned long l,r;
 598
 599         l=ERR_GET_LIB(e);
 600         r=ERR_GET_REASON(e);
 601
 602         CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
 603
 604         if (error_hash != NULL)
 605                 {
 606                 d.error=ERR_PACK(l,0,r);
 607                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 608                 if (p == NULL)
 609                         {
 610                         d.error=ERR_PACK(0,0,r);
 611                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 612                         }
 613                 }
 614
 615         CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
 616
 617         return((p == NULL)?NULL:p->string);
 618         }
 619
 620 static unsigned long err_hash(ERR_STRING_DATA *a)
 621         {
 622         unsigned long ret,l;
 623
 624         l=a->error;
 625         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 626         return(ret^ret%19*13);
 627         }
 628
 629 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
 630         {
 631         return((int)(a->error-b->error));
 632         }
 633
 634 static unsigned long pid_hash(ERR_STATE *a)
 635         {
 636         return(a->pid*13);
 637         }
 638
 639 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
 640         {
 641         return((int)((long)a->pid - (long)b->pid));
 642         }
 643
 644 void ERR_remove_state(unsigned long pid)
 645         {
 646         ERR_STATE *p,tmp;
 647
 648         if (thread_hash == NULL)
 649                 return;
 650         if (pid == 0)
 651                 pid=(unsigned long)CRYPTO_thread_id();
 652         tmp.pid=pid;
 653         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 654         p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
 655         if (lh_num_items(thread_hash) == 0)
 656                 {
 657                 /* make sure we don't leak memory */
 658                 lh_free(thread_hash);
 659                 thread_hash = NULL;
 660                 }
 661         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 662
 663         if (p != NULL) ERR_STATE_free(p);
 664         }
 665
 666 ERR_STATE *ERR_get_state(void)
 667         {
 668         static ERR_STATE fallback;
 669         ERR_STATE *ret=NULL,tmp,*tmpp;
 670         int thread_state_exists;
 671         int i;
 672         unsigned long pid;
 673
 674         pid=(unsigned long)CRYPTO_thread_id();
 675
 676         CRYPTO_r_lock(CRYPTO_LOCK_ERR);
 677         if (thread_hash != NULL)
 678                 {
 679                 tmp.pid=pid;
 680                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
 681                 }
 682         CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
 683
 684         /* ret == the error state, if NULL, make a new one */
 685         if (ret == NULL)
 686                 {
 687                 ret=(ERR_STATE *)Malloc(sizeof(ERR_STATE));
 688                 if (ret == NULL) return(&fallback);
 689                 ret->pid=pid;
 690                 ret->top=0;
 691                 ret->bottom=0;
 692                 for (i=0; i<ERR_NUM_ERRORS; i++)
 693                         {
 694                         ret->err_data[i]=NULL;
 695                         ret->err_data_flags[i]=0;
 696                         }
 697
 698                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 699
 700                 /* no entry yet in thread_hash for current thread -
 701                  * thus, it may have changed since we last looked at it */
 702                 if (thread_hash == NULL)
 703                         thread_hash = lh_new(pid_hash, pid_cmp);
 704                 if (thread_hash == NULL)
 705                         thread_state_exists = 0; /* allocation error */
 706                 else
 707                         {
 708                         tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
 709                         thread_state_exists = 1;
 710                         }
 711
 712                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 713
 714                 if (!thread_state_exists)
 715                         {
 716                         ERR_STATE_free(ret); /* could not insert it */
 717                         return(&fallback);
 718                         }
 719
 720                 if (tmpp != NULL) /* old entry - should not happen */
 721                         {
 722                         ERR_STATE_free(tmpp);
 723                         }
 724                 }
 725         return(ret);
 726         }
 727
 728 int ERR_get_next_error_library(void)
 729         {
 730         static int value=ERR_LIB_USER;
 731
 732         return(value++);
 733         }
 734
 735 void ERR_set_error_data(char *data, int flags)
 736         {
 737         ERR_STATE *es;
 738         int i;
 739
 740         es=ERR_get_state();
 741
 742         i=es->top;
 743         if (i == 0)
 744                 i=ERR_NUM_ERRORS-1;
 745
 746         es->err_data[i]=data;
 747         es->err_data_flags[es->top]=flags;
 748         }
 749
 750 void ERR_add_error_data(int num, ...)
 751         {
 752         va_list args;
 753         int i,n,s;
 754         char *str,*p,*a;
 755
 756         s=64;
 757         str=Malloc(s+1);
 758         if (str == NULL) return;
 759         str[0]='\0';
 760
 761         va_start(args, num);
 762         n=0;
 763         for (i=0; i<num; i++)
 764                 {
 765                 a=va_arg(args, char*);
 766                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 767                 if (a != NULL)
 768                         {
 769                         n+=strlen(a);
 770                         if (n > s)
 771                                 {
 772                                 s=n+20;
 773                                 p=Realloc(str,s+1);
 774                                 if (p == NULL)
 775                                         {
 776                                         Free(str);
 777                                         return;
 778                                         }
 779                                 else
 780                                         str=p;
 781                                 }
 782                         strcat(str,a);
 783                         }
 784                 }
 785         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 786
 787         va_end(args);
 788         }
 789