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