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_DSA,0,0)              ,"dsa routines"},
 141 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
 142 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
 143 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
 144 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 145 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
 146 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
 147 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
 148 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
 149 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuration file routines"},
 150 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
 151 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
 152 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
 153 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
 154 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 155 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
 156 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
 157 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
 158 {ERR_PACK(ERR_LIB_RAND,0,0)             ,"random number generator"},
 159 {ERR_PACK(ERR_LIB_DSO,0,0)              ,"DSO support routines"},
 160 {ERR_PACK(ERR_LIB_ENGINE,0,0)           ,"engine routines"},
 161 {0,NULL},
 162         };
 163
 164 static ERR_STRING_DATA ERR_str_functs[]=
 165         {
 166         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 167         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 168         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 169         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 170         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 171         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 172         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 173         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 174 #ifdef WINDOWS
 175         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 176 #endif
 177         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
 178         {0,NULL},
 179         };
 180
 181 static ERR_STRING_DATA ERR_str_reasons[]=
 182         {
 183 {ERR_R_FATAL                             ,"fatal"},
 184 {ERR_R_SYS_LIB                          ,"system lib"},
 185 {ERR_R_BN_LIB                           ,"BN lib"},
 186 {ERR_R_RSA_LIB                          ,"RSA lib"},
 187 {ERR_R_DH_LIB                           ,"DH lib"},
 188 {ERR_R_EVP_LIB                          ,"EVP lib"},
 189 {ERR_R_BUF_LIB                          ,"BUF lib"},
 190 {ERR_R_BIO_LIB                          ,"BIO lib"},
 191 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 192 {ERR_R_PEM_LIB                          ,"PEM lib"},
 193 {ERR_R_X509_LIB                         ,"X509 lib"},
 194 {ERR_R_METH_LIB                         ,"METH lib"},
 195 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 196 {ERR_R_CONF_LIB                         ,"CONF lib"},
 197 {ERR_R_SSL_LIB                          ,"SSL lib"},
 198 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 199 {ERR_R_BIO_LIB                          ,"BIO lib"},
 200 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 201 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
 202 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 203 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
 204 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 205 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 206 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 207 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 208 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 209 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 210 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 211 {ERR_R_DSO_LIB                          ,"DSO lib"},
 212 {ERR_R_ENGINE_LIB                       ,"ENGINE lib"},
 213
 214 {0,NULL},
 215         };
 216
 217
 218 #define NUM_SYS_STR_REASONS 127
 219 #define LEN_SYS_STR_REASON 32
 220
 221 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 222 /* SYS_str_reasons is filled with copies of strerror() results at
 223  * initialization.
 224  * 'errno' values up to 127 should cover all usual errors,
 225  * others will be displayed numerically by ERR_error_string.
 226  * It is crucial that we have something for each reason code
 227  * that occurs in ERR_str_reasons, or bogus reason strings
 228  * will be returned for SYSerr(), which always gets an errno
 229  * value and never one of those 'standard' reason codes. */
 230
 231 static void build_SYS_str_reasons()
 232         {
 233         /* OPENSSL_malloc cannot be used here, use static storage instead */
 234         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 235         int i;
 236
 237         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 238
 239         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
 240                 {
 241                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 242
 243                 str->error = (unsigned long)i;
 244                 if (str->string == NULL)
 245                         {
 246                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 247                         char *src = strerror(i);
 248                         if (src != NULL)
 249                                 {
 250                                 strncpy(*dest, src, sizeof *dest);
 251                                 (*dest)[sizeof *dest - 1] = '\0';
 252                                 str->string = *dest;
 253                                 }
 254                         }
 255                 if (str->string == NULL)
 256                         str->string = "unknown";
 257                 }
 258
 259         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
 260          * as required by ERR_load_strings. */
 261
 262         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 263         }
 264 #endif
 265
 266 #define err_clear_data(p,i) \
 267         if (((p)->err_data[i] != NULL) && \
 268                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 269                 {  \
 270                 OPENSSL_free((p)->err_data[i]); \
 271                 (p)->err_data[i]=NULL; \
 272                 } \
 273         (p)->err_data_flags[i]=0;
 274
 275 static void ERR_STATE_free(ERR_STATE *s)
 276         {
 277         int i;
 278
 279         if(s == NULL)
 280             return;
 281
 282         for (i=0; i<ERR_NUM_ERRORS; i++)
 283                 {
 284                 err_clear_data(s,i);
 285                 }
 286         OPENSSL_free(s);
 287         }
 288
 289 void ERR_load_ERR_strings(void)
 290         {
 291         static int init=1;
 292
 293         if (init)
 294                 {
 295                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 296                 if (init == 0)
 297                         {
 298                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 299                         return;
 300                         }
 301                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 302
 303 #ifndef NO_ERR
 304                 ERR_load_strings(0,ERR_str_libraries);
 305                 ERR_load_strings(0,ERR_str_reasons);
 306                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 307                 build_SYS_str_reasons();
 308                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
 309 #endif
 310                 init=0;
 311                 }
 312         }
 313
 314 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 315         {
 316         if (error_hash == NULL)
 317                 {
 318                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 319                 error_hash=lh_new((LHASH_HASH_FN_TYPE)err_hash,
 320                                 (LHASH_COMP_FN_TYPE)err_cmp);
 321                 if (error_hash == NULL)
 322                         {
 323                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 324                         return;
 325                         }
 326                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 327
 328                 ERR_load_ERR_strings();
 329                 }
 330
 331         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 332         while (str->error)
 333                 {
 334                 str->error|=ERR_PACK(lib,0,0);
 335                 lh_insert(error_hash,str);
 336                 str++;
 337                 }
 338         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 339         }
 340
 341 void ERR_free_strings(void)
 342         {
 343         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 344
 345         if (error_hash != NULL)
 346                 {
 347                 lh_free(error_hash);
 348                 error_hash=NULL;
 349                 }
 350
 351         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 352         }
 353
 354 /********************************************************/
 355
 356 void ERR_put_error(int lib, int func, int reason, const char *file,
 357              int line)
 358         {
 359         ERR_STATE *es;
 360
 361 #ifdef _OSD_POSIX
 362         /* In the BS2000-OSD POSIX subsystem, the compiler generates
 363          * path names in the form "*POSIX(/etc/passwd)".
 364          * This dirty hack strips them to something sensible.
 365          * @@@ We shouldn't modify a const string, though.
 366          */
 367         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
 368                 char *end;
 369
 370                 /* Skip the "*POSIX(" prefix */
 371                 file += sizeof("*POSIX(")-1;
 372                 end = &file[strlen(file)-1];
 373                 if (*end == ')')
 374                         *end = '\0';
 375                 /* Optional: use the basename of the path only. */
 376                 if ((end = strrchr(file, '/')) != NULL)
 377                         file = &end[1];
 378         }
 379 #endif
 380         es=ERR_get_state();
 381
 382         es->top=(es->top+1)%ERR_NUM_ERRORS;
 383         if (es->top == es->bottom)
 384                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 385         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 386         es->err_file[es->top]=file;
 387         es->err_line[es->top]=line;
 388         err_clear_data(es,es->top);
 389         }
 390
 391 void ERR_clear_error(void)
 392         {
 393         ERR_STATE *es;
 394
 395         es=ERR_get_state();
 396
 397 #if 0
 398         /* hmm... is this needed */
 399         for (i=0; i<ERR_NUM_ERRORS; i++)
 400                 {
 401                 es->err_buffer[i]=0;
 402                 es->err_file[i]=NULL;
 403                 es->err_line[i]= -1;
 404                 err_clear_data(es,i);
 405                 }
 406 #endif
 407         es->top=es->bottom=0;
 408         }
 409
 410
 411 unsigned long ERR_get_error(void)
 412         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 413
 414 unsigned long ERR_get_error_line(const char **file,
 415              int *line)
 416         { return(get_error_values(1,file,line,NULL,NULL)); }
 417
 418 unsigned long ERR_get_error_line_data(const char **file, int *line,
 419              const char **data, int *flags)
 420         { return(get_error_values(1,file,line,
 421              data,flags)); }
 422
 423 unsigned long ERR_peek_error(void)
 424         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 425
 426 unsigned long ERR_peek_error_line(const char **file,
 427              int *line)
 428         { return(get_error_values(0,file,line,NULL,NULL)); }
 429
 430 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 431              const char **data, int *flags)
 432         { return(get_error_values(0,file,line,
 433              data,flags)); }
 434
 435 static unsigned long get_error_values(int inc, const char **file, int *line,
 436              const char **data, int *flags)
 437         {
 438         int i=0;
 439         ERR_STATE *es;
 440         unsigned long ret;
 441
 442         es=ERR_get_state();
 443
 444         if (es->bottom == es->top) return(0);
 445         i=(es->bottom+1)%ERR_NUM_ERRORS;
 446
 447         ret=es->err_buffer[i];
 448         if (inc)
 449                 {
 450                 es->bottom=i;
 451                 es->err_buffer[i]=0;
 452                 }
 453
 454         if ((file != NULL) && (line != NULL))
 455                 {
 456                 if (es->err_file[i] == NULL)
 457                         {
 458                         *file="NA";
 459                         if (line != NULL) *line=0;
 460                         }
 461                 else
 462                         {
 463                         *file=es->err_file[i];
 464                         if (line != NULL) *line=es->err_line[i];
 465                         }
 466                 }
 467
 468         if (data != NULL)
 469                 {
 470                 if (es->err_data[i] == NULL)
 471                         {
 472                         *data="";
 473                         if (flags != NULL) *flags=0;
 474                         }
 475                 else
 476                         {
 477                         *data=es->err_data[i];
 478                         if (flags != NULL) *flags=es->err_data_flags[i];
 479                         }
 480                 }
 481         return(ret);
 482         }
 483
 484 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 485         {
 486         char lsbuf[64], fsbuf[64], rsbuf[64];
 487         const char *ls,*fs,*rs;
 488         unsigned long l,f,r;
 489
 490         l=ERR_GET_LIB(e);
 491         f=ERR_GET_FUNC(e);
 492         r=ERR_GET_REASON(e);
 493
 494         ls=ERR_lib_error_string(e);
 495         fs=ERR_func_error_string(e);
 496         rs=ERR_reason_error_string(e);
 497
 498         if (ls == NULL)
 499                 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 500         if (fs == NULL)
 501                 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 502         if (rs == NULL)
 503                 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 504
 505         BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf,
 506                 fs?fs:fsbuf, rs?rs:rsbuf);
 507         if (strlen(buf) == len-1)
 508                 {
 509                 /* output may be truncated; make sure we always have 5
 510                  * colon-separated fields, i.e. 4 colons ... */
 511 #define NUM_COLONS 4
 512                 if (len > NUM_COLONS) /* ... if possible */
 513                         {
 514                         int i;
 515                         char *s = buf;
 516
 517                         for (i = 0; i < NUM_COLONS; i++)
 518                                 {
 519                                 char *colon = strchr(s, ':');
 520                                 if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
 521                                         {
 522                                         /* set colon no. i at last possible position
 523                                          * (buf[len-1] is the terminating 0)*/
 524                                         colon = &buf[len-1] - NUM_COLONS + i;
 525                                         *colon = ':';
 526                                         }
 527                                 s = colon + 1;
 528                                 }
 529                         }
 530                 }
 531         }
 532
 533 /* BAD for multi-threading: uses a local buffer if ret == NULL */
 534 /* ERR_error_string_n should be used instead for ret != NULL
 535  * as ERR_error_string cannot know how large the buffer is */
 536 char *ERR_error_string(unsigned long e, char *ret)
 537         {
 538         static char buf[256];
 539
 540         if (ret == NULL) ret=buf;
 541         ERR_error_string_n(e, ret, 256);
 542
 543         return(ret);
 544         }
 545
 546 LHASH *ERR_get_string_table(void)
 547         {
 548         return(error_hash);
 549         }
 550
 551 /* not thread-safe */
 552 LHASH *ERR_get_err_state_table(void)
 553         {
 554         return(thread_hash);
 555         }
 556
 557 const char *ERR_lib_error_string(unsigned long e)
 558         {
 559         ERR_STRING_DATA d,*p=NULL;
 560         unsigned long l;
 561
 562         l=ERR_GET_LIB(e);
 563
 564         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 565
 566         if (error_hash != NULL)
 567                 {
 568                 d.error=ERR_PACK(l,0,0);
 569                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 570                 }
 571
 572         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 573
 574         return((p == NULL)?NULL:p->string);
 575         }
 576
 577 const char *ERR_func_error_string(unsigned long e)
 578         {
 579         ERR_STRING_DATA d,*p=NULL;
 580         unsigned long l,f;
 581
 582         l=ERR_GET_LIB(e);
 583         f=ERR_GET_FUNC(e);
 584
 585         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 586
 587         if (error_hash != NULL)
 588                 {
 589                 d.error=ERR_PACK(l,f,0);
 590                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 591                 }
 592
 593         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 594
 595         return((p == NULL)?NULL:p->string);
 596         }
 597
 598 const char *ERR_reason_error_string(unsigned long e)
 599         {
 600         ERR_STRING_DATA d,*p=NULL;
 601         unsigned long l,r;
 602
 603         l=ERR_GET_LIB(e);
 604         r=ERR_GET_REASON(e);
 605
 606         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 607
 608         if (error_hash != NULL)
 609                 {
 610                 d.error=ERR_PACK(l,0,r);
 611                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 612                 if (p == NULL)
 613                         {
 614                         d.error=ERR_PACK(0,0,r);
 615                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 616                         }
 617                 }
 618
 619         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 620
 621         return((p == NULL)?NULL:p->string);
 622         }
 623
 624 static unsigned long err_hash(ERR_STRING_DATA *a)
 625         {
 626         unsigned long ret,l;
 627
 628         l=a->error;
 629         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 630         return(ret^ret%19*13);
 631         }
 632
 633 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
 634         {
 635         return((int)(a->error-b->error));
 636         }
 637
 638 static unsigned long pid_hash(ERR_STATE *a)
 639         {
 640         return(a->pid*13);
 641         }
 642
 643 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
 644         {
 645         return((int)((long)a->pid - (long)b->pid));
 646         }
 647
 648 void ERR_remove_state(unsigned long pid)
 649         {
 650         ERR_STATE *p = NULL,tmp;
 651
 652         if (thread_hash == NULL)
 653                 return;
 654         if (pid == 0)
 655                 pid=(unsigned long)CRYPTO_thread_id();
 656         tmp.pid=pid;
 657         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 658         if (thread_hash)
 659                 {
 660                 p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
 661                 if (lh_num_items(thread_hash) == 0)
 662                         {
 663                         /* make sure we don't leak memory */
 664                         lh_free(thread_hash);
 665                         thread_hash = NULL;
 666                         }
 667                 }
 668         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 669
 670         if (p != NULL) ERR_STATE_free(p);
 671         }
 672
 673 ERR_STATE *ERR_get_state(void)
 674         {
 675         static ERR_STATE fallback;
 676         ERR_STATE *ret=NULL,tmp,*tmpp=NULL;
 677         int thread_state_exists;
 678         int i;
 679         unsigned long pid;
 680
 681         pid=(unsigned long)CRYPTO_thread_id();
 682
 683         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 684         if (thread_hash != NULL)
 685                 {
 686                 tmp.pid=pid;
 687                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
 688                 }
 689         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 690
 691         /* ret == the error state, if NULL, make a new one */
 692         if (ret == NULL)
 693                 {
 694                 ret=(ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
 695                 if (ret == NULL) return(&fallback);
 696                 ret->pid=pid;
 697                 ret->top=0;
 698                 ret->bottom=0;
 699                 for (i=0; i<ERR_NUM_ERRORS; i++)
 700                         {
 701                         ret->err_data[i]=NULL;
 702                         ret->err_data_flags[i]=0;
 703                         }
 704
 705                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 706
 707                 /* no entry yet in thread_hash for current thread -
 708                  * thus, it may have changed since we last looked at it */
 709                 if (thread_hash == NULL)
 710                         thread_hash = lh_new((LHASH_HASH_FN_TYPE)pid_hash,
 711                                         (LHASH_COMP_FN_TYPE)pid_cmp);
 712                 if (thread_hash == NULL)
 713                         thread_state_exists = 0; /* allocation error */
 714                 else
 715                         {
 716                         tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
 717                         thread_state_exists = 1;
 718                         }
 719
 720                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 721
 722                 if (!thread_state_exists)
 723                         {
 724                         ERR_STATE_free(ret); /* could not insert it */
 725                         return(&fallback);
 726                         }
 727
 728                 if (tmpp != NULL) /* old entry - should not happen */
 729                         {
 730                         ERR_STATE_free(tmpp);
 731                         }
 732                 }
 733         return(ret);
 734         }
 735
 736 int ERR_get_next_error_library(void)
 737         {
 738         static int value=ERR_LIB_USER;
 739
 740         return(value++);
 741         }
 742
 743 void ERR_set_error_data(char *data, int flags)
 744         {
 745         ERR_STATE *es;
 746         int i;
 747
 748         es=ERR_get_state();
 749
 750         i=es->top;
 751         if (i == 0)
 752                 i=ERR_NUM_ERRORS-1;
 753
 754         es->err_data[i]=data;
 755         es->err_data_flags[es->top]=flags;
 756         }
 757
 758 void ERR_add_error_data(int num, ...)
 759         {
 760         va_list args;
 761         int i,n,s;
 762         char *str,*p,*a;
 763
 764         s=64;
 765         str=OPENSSL_malloc(s+1);
 766         if (str == NULL) return;
 767         str[0]='\0';
 768
 769         va_start(args, num);
 770         n=0;
 771         for (i=0; i<num; i++)
 772                 {
 773                 a=va_arg(args, char*);
 774                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 775                 if (a != NULL)
 776                         {
 777                         n+=strlen(a);
 778                         if (n > s)
 779                                 {
 780                                 s=n+20;
 781                                 p=OPENSSL_realloc(str,s+1);
 782                                 if (p == NULL)
 783                                         {
 784                                         OPENSSL_free(str);
 785                                         return;
 786                                         }
 787                                 else
 788                                         str=p;
 789                                 }
 790                         strcat(str,a);
 791                         }
 792                 }
 793         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 794
 795         va_end(args);
 796         }
 797