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
 133 static IMPLEMENT_LHASH_HASH_FN(err_hash, ERR_STRING_DATA *)
 134 static IMPLEMENT_LHASH_COMP_FN(err_cmp, ERR_STRING_DATA *)
 135 static IMPLEMENT_LHASH_HASH_FN(pid_hash, ERR_STATE *)
 136 static IMPLEMENT_LHASH_COMP_FN(pid_cmp, ERR_STATE *)
 137
 138 static void ERR_STATE_free(ERR_STATE *s);
 139 #ifndef NO_ERR
 140 static ERR_STRING_DATA ERR_str_libraries[]=
 141         {
 142 {ERR_PACK(ERR_LIB_NONE,0,0)             ,"unknown library"},
 143 {ERR_PACK(ERR_LIB_SYS,0,0)              ,"system library"},
 144 {ERR_PACK(ERR_LIB_BN,0,0)               ,"bignum routines"},
 145 {ERR_PACK(ERR_LIB_RSA,0,0)              ,"rsa routines"},
 146 {ERR_PACK(ERR_LIB_DSA,0,0)              ,"dsa routines"},
 147 {ERR_PACK(ERR_LIB_DH,0,0)               ,"Diffie-Hellman routines"},
 148 {ERR_PACK(ERR_LIB_EVP,0,0)              ,"digital envelope routines"},
 149 {ERR_PACK(ERR_LIB_BUF,0,0)              ,"memory buffer routines"},
 150 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 151 {ERR_PACK(ERR_LIB_OBJ,0,0)              ,"object identifier routines"},
 152 {ERR_PACK(ERR_LIB_PEM,0,0)              ,"PEM routines"},
 153 {ERR_PACK(ERR_LIB_ASN1,0,0)             ,"asn1 encoding routines"},
 154 {ERR_PACK(ERR_LIB_X509,0,0)             ,"x509 certificate routines"},
 155 {ERR_PACK(ERR_LIB_CONF,0,0)             ,"configuration file routines"},
 156 {ERR_PACK(ERR_LIB_METH,0,0)             ,"X509 lookup 'method' routines"},
 157 {ERR_PACK(ERR_LIB_SSL,0,0)              ,"SSL routines"},
 158 {ERR_PACK(ERR_LIB_RSAREF,0,0)           ,"RSAref routines"},
 159 {ERR_PACK(ERR_LIB_PROXY,0,0)            ,"Proxy routines"},
 160 {ERR_PACK(ERR_LIB_BIO,0,0)              ,"BIO routines"},
 161 {ERR_PACK(ERR_LIB_PKCS7,0,0)            ,"PKCS7 routines"},
 162 {ERR_PACK(ERR_LIB_X509V3,0,0)           ,"X509 V3 routines"},
 163 {ERR_PACK(ERR_LIB_PKCS12,0,0)           ,"PKCS12 routines"},
 164 {ERR_PACK(ERR_LIB_RAND,0,0)             ,"random number generator"},
 165 {ERR_PACK(ERR_LIB_DSO,0,0)              ,"DSO support routines"},
 166 {ERR_PACK(ERR_LIB_ENGINE,0,0)           ,"engine routines"},
 167 {0,NULL},
 168         };
 169
 170 static ERR_STRING_DATA ERR_str_functs[]=
 171         {
 172         {ERR_PACK(0,SYS_F_FOPEN,0),             "fopen"},
 173         {ERR_PACK(0,SYS_F_CONNECT,0),           "connect"},
 174         {ERR_PACK(0,SYS_F_GETSERVBYNAME,0),     "getservbyname"},
 175         {ERR_PACK(0,SYS_F_SOCKET,0),            "socket"},
 176         {ERR_PACK(0,SYS_F_IOCTLSOCKET,0),       "ioctlsocket"},
 177         {ERR_PACK(0,SYS_F_BIND,0),              "bind"},
 178         {ERR_PACK(0,SYS_F_LISTEN,0),            "listen"},
 179         {ERR_PACK(0,SYS_F_ACCEPT,0),            "accept"},
 180 #ifdef WINDOWS
 181         {ERR_PACK(0,SYS_F_WSASTARTUP,0),        "WSAstartup"},
 182 #endif
 183         {ERR_PACK(0,SYS_F_OPENDIR,0),           "opendir"},
 184         {0,NULL},
 185         };
 186
 187 static ERR_STRING_DATA ERR_str_reasons[]=
 188         {
 189 {ERR_R_FATAL                             ,"fatal"},
 190 {ERR_R_SYS_LIB                          ,"system lib"},
 191 {ERR_R_BN_LIB                           ,"BN lib"},
 192 {ERR_R_RSA_LIB                          ,"RSA lib"},
 193 {ERR_R_DH_LIB                           ,"DH lib"},
 194 {ERR_R_EVP_LIB                          ,"EVP lib"},
 195 {ERR_R_BUF_LIB                          ,"BUF lib"},
 196 {ERR_R_BIO_LIB                          ,"BIO lib"},
 197 {ERR_R_OBJ_LIB                          ,"OBJ lib"},
 198 {ERR_R_PEM_LIB                          ,"PEM lib"},
 199 {ERR_R_X509_LIB                         ,"X509 lib"},
 200 {ERR_R_METH_LIB                         ,"METH lib"},
 201 {ERR_R_ASN1_LIB                         ,"ASN1 lib"},
 202 {ERR_R_CONF_LIB                         ,"CONF lib"},
 203 {ERR_R_SSL_LIB                          ,"SSL lib"},
 204 {ERR_R_PROXY_LIB                        ,"PROXY lib"},
 205 {ERR_R_BIO_LIB                          ,"BIO lib"},
 206 {ERR_R_PKCS7_LIB                        ,"PKCS7 lib"},
 207 {ERR_R_PKCS12_LIB                       ,"PKCS12 lib"},
 208 {ERR_R_MALLOC_FAILURE                   ,"Malloc failure"},
 209 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED      ,"called a function you should not call"},
 210 {ERR_R_PASSED_NULL_PARAMETER            ,"passed a null parameter"},
 211 {ERR_R_NESTED_ASN1_ERROR                ,"nested asn1 error"},
 212 {ERR_R_BAD_ASN1_OBJECT_HEADER           ,"bad asn1 object header"},
 213 {ERR_R_BAD_GET_ASN1_OBJECT_CALL         ,"bad get asn1 object call"},
 214 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE       ,"expecting an asn1 sequence"},
 215 {ERR_R_ASN1_LENGTH_MISMATCH             ,"asn1 length mismatch"},
 216 {ERR_R_MISSING_ASN1_EOS                 ,"missing asn1 eos"},
 217 {ERR_R_DSO_LIB                          ,"DSO lib"},
 218 {ERR_R_ENGINE_LIB                       ,"ENGINE lib"},
 219
 220 {0,NULL},
 221         };
 222
 223
 224 #define NUM_SYS_STR_REASONS 127
 225 #define LEN_SYS_STR_REASON 32
 226
 227 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 228 /* SYS_str_reasons is filled with copies of strerror() results at
 229  * initialization.
 230  * 'errno' values up to 127 should cover all usual errors,
 231  * others will be displayed numerically by ERR_error_string.
 232  * It is crucial that we have something for each reason code
 233  * that occurs in ERR_str_reasons, or bogus reason strings
 234  * will be returned for SYSerr(), which always gets an errno
 235  * value and never one of those 'standard' reason codes. */
 236
 237 static void build_SYS_str_reasons()
 238         {
 239         /* OPENSSL_malloc cannot be used here, use static storage instead */
 240         static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 241         int i;
 242
 243         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 244
 245         for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
 246                 {
 247                 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 248
 249                 str->error = (unsigned long)i;
 250                 if (str->string == NULL)
 251                         {
 252                         char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 253                         char *src = strerror(i);
 254                         if (src != NULL)
 255                                 {
 256                                 strncpy(*dest, src, sizeof *dest);
 257                                 (*dest)[sizeof *dest - 1] = '\0';
 258                                 str->string = *dest;
 259                                 }
 260                         }
 261                 if (str->string == NULL)
 262                         str->string = "unknown";
 263                 }
 264
 265         /* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
 266          * as required by ERR_load_strings. */
 267
 268         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 269         }
 270 #endif
 271
 272 #define err_clear_data(p,i) \
 273         if (((p)->err_data[i] != NULL) && \
 274                 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 275                 {  \
 276                 OPENSSL_free((p)->err_data[i]); \
 277                 (p)->err_data[i]=NULL; \
 278                 } \
 279         (p)->err_data_flags[i]=0;
 280
 281 static void ERR_STATE_free(ERR_STATE *s)
 282         {
 283         int i;
 284
 285         if(s == NULL)
 286             return;
 287
 288         for (i=0; i<ERR_NUM_ERRORS; i++)
 289                 {
 290                 err_clear_data(s,i);
 291                 }
 292         OPENSSL_free(s);
 293         }
 294
 295 void ERR_load_ERR_strings(void)
 296         {
 297         static int init=1;
 298
 299         if (init)
 300                 {
 301                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 302                 if (init == 0)
 303                         {
 304                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 305                         return;
 306                         }
 307                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 308
 309 #ifndef NO_ERR
 310                 ERR_load_strings(0,ERR_str_libraries);
 311                 ERR_load_strings(0,ERR_str_reasons);
 312                 ERR_load_strings(ERR_LIB_SYS,ERR_str_functs);
 313                 build_SYS_str_reasons();
 314                 ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
 315 #endif
 316                 init=0;
 317                 }
 318         }
 319
 320 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 321         {
 322         if (error_hash == NULL)
 323                 {
 324                 CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 325                 error_hash=lh_new(LHASH_HASH_FN(err_hash),
 326                                 LHASH_COMP_FN(err_cmp));
 327                 if (error_hash == NULL)
 328                         {
 329                         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 330                         return;
 331                         }
 332                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 333
 334                 ERR_load_ERR_strings();
 335                 }
 336
 337         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 338         while (str->error)
 339                 {
 340                 str->error|=ERR_PACK(lib,0,0);
 341                 lh_insert(error_hash,str);
 342                 str++;
 343                 }
 344         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 345         }
 346
 347 void ERR_free_strings(void)
 348         {
 349         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 350
 351         if (error_hash != NULL)
 352                 {
 353                 lh_free(error_hash);
 354                 error_hash=NULL;
 355                 }
 356
 357         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 358         }
 359
 360 /********************************************************/
 361
 362 void ERR_put_error(int lib, int func, int reason, const char *file,
 363              int line)
 364         {
 365         ERR_STATE *es;
 366
 367 #ifdef _OSD_POSIX
 368         /* In the BS2000-OSD POSIX subsystem, the compiler generates
 369          * path names in the form "*POSIX(/etc/passwd)".
 370          * This dirty hack strips them to something sensible.
 371          * @@@ We shouldn't modify a const string, though.
 372          */
 373         if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
 374                 char *end;
 375
 376                 /* Skip the "*POSIX(" prefix */
 377                 file += sizeof("*POSIX(")-1;
 378                 end = &file[strlen(file)-1];
 379                 if (*end == ')')
 380                         *end = '\0';
 381                 /* Optional: use the basename of the path only. */
 382                 if ((end = strrchr(file, '/')) != NULL)
 383                         file = &end[1];
 384         }
 385 #endif
 386         es=ERR_get_state();
 387
 388         es->top=(es->top+1)%ERR_NUM_ERRORS;
 389         if (es->top == es->bottom)
 390                 es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
 391         es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
 392         es->err_file[es->top]=file;
 393         es->err_line[es->top]=line;
 394         err_clear_data(es,es->top);
 395         }
 396
 397 void ERR_clear_error(void)
 398         {
 399         ERR_STATE *es;
 400
 401         es=ERR_get_state();
 402
 403 #if 0
 404         /* hmm... is this needed */
 405         for (i=0; i<ERR_NUM_ERRORS; i++)
 406                 {
 407                 es->err_buffer[i]=0;
 408                 es->err_file[i]=NULL;
 409                 es->err_line[i]= -1;
 410                 err_clear_data(es,i);
 411                 }
 412 #endif
 413         es->top=es->bottom=0;
 414         }
 415
 416
 417 unsigned long ERR_get_error(void)
 418         { return(get_error_values(1,NULL,NULL,NULL,NULL)); }
 419
 420 unsigned long ERR_get_error_line(const char **file,
 421              int *line)
 422         { return(get_error_values(1,file,line,NULL,NULL)); }
 423
 424 unsigned long ERR_get_error_line_data(const char **file, int *line,
 425              const char **data, int *flags)
 426         { return(get_error_values(1,file,line,
 427              data,flags)); }
 428
 429 unsigned long ERR_peek_error(void)
 430         { return(get_error_values(0,NULL,NULL,NULL,NULL)); }
 431
 432 unsigned long ERR_peek_error_line(const char **file,
 433              int *line)
 434         { return(get_error_values(0,file,line,NULL,NULL)); }
 435
 436 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 437              const char **data, int *flags)
 438         { return(get_error_values(0,file,line,
 439              data,flags)); }
 440
 441 static unsigned long get_error_values(int inc, const char **file, int *line,
 442              const char **data, int *flags)
 443         {
 444         int i=0;
 445         ERR_STATE *es;
 446         unsigned long ret;
 447
 448         es=ERR_get_state();
 449
 450         if (es->bottom == es->top) return(0);
 451         i=(es->bottom+1)%ERR_NUM_ERRORS;
 452
 453         ret=es->err_buffer[i];
 454         if (inc)
 455                 {
 456                 es->bottom=i;
 457                 es->err_buffer[i]=0;
 458                 }
 459
 460         if ((file != NULL) && (line != NULL))
 461                 {
 462                 if (es->err_file[i] == NULL)
 463                         {
 464                         *file="NA";
 465                         if (line != NULL) *line=0;
 466                         }
 467                 else
 468                         {
 469                         *file=es->err_file[i];
 470                         if (line != NULL) *line=es->err_line[i];
 471                         }
 472                 }
 473
 474         if (data != NULL)
 475                 {
 476                 if (es->err_data[i] == NULL)
 477                         {
 478                         *data="";
 479                         if (flags != NULL) *flags=0;
 480                         }
 481                 else
 482                         {
 483                         *data=es->err_data[i];
 484                         if (flags != NULL) *flags=es->err_data_flags[i];
 485                         }
 486                 }
 487         return(ret);
 488         }
 489
 490 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 491         {
 492         char lsbuf[64], fsbuf[64], rsbuf[64];
 493         const char *ls,*fs,*rs;
 494         unsigned long l,f,r;
 495
 496         l=ERR_GET_LIB(e);
 497         f=ERR_GET_FUNC(e);
 498         r=ERR_GET_REASON(e);
 499
 500         ls=ERR_lib_error_string(e);
 501         fs=ERR_func_error_string(e);
 502         rs=ERR_reason_error_string(e);
 503
 504         if (ls == NULL)
 505                 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 506         if (fs == NULL)
 507                 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 508         if (rs == NULL)
 509                 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 510
 511         BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf,
 512                 fs?fs:fsbuf, rs?rs:rsbuf);
 513         if (strlen(buf) == len-1)
 514                 {
 515                 /* output may be truncated; make sure we always have 5
 516                  * colon-separated fields, i.e. 4 colons ... */
 517 #define NUM_COLONS 4
 518                 if (len > NUM_COLONS) /* ... if possible */
 519                         {
 520                         int i;
 521                         char *s = buf;
 522
 523                         for (i = 0; i < NUM_COLONS; i++)
 524                                 {
 525                                 char *colon = strchr(s, ':');
 526                                 if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
 527                                         {
 528                                         /* set colon no. i at last possible position
 529                                          * (buf[len-1] is the terminating 0)*/
 530                                         colon = &buf[len-1] - NUM_COLONS + i;
 531                                         *colon = ':';
 532                                         }
 533                                 s = colon + 1;
 534                                 }
 535                         }
 536                 }
 537         }
 538
 539 /* BAD for multi-threading: uses a local buffer if ret == NULL */
 540 /* ERR_error_string_n should be used instead for ret != NULL
 541  * as ERR_error_string cannot know how large the buffer is */
 542 char *ERR_error_string(unsigned long e, char *ret)
 543         {
 544         static char buf[256];
 545
 546         if (ret == NULL) ret=buf;
 547         ERR_error_string_n(e, ret, 256);
 548
 549         return(ret);
 550         }
 551
 552 LHASH *ERR_get_string_table(void)
 553         {
 554         return(error_hash);
 555         }
 556
 557 /* not thread-safe */
 558 LHASH *ERR_get_err_state_table(void)
 559         {
 560         return(thread_hash);
 561         }
 562
 563 const char *ERR_lib_error_string(unsigned long e)
 564         {
 565         ERR_STRING_DATA d,*p=NULL;
 566         unsigned long l;
 567
 568         l=ERR_GET_LIB(e);
 569
 570         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 571
 572         if (error_hash != NULL)
 573                 {
 574                 d.error=ERR_PACK(l,0,0);
 575                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 576                 }
 577
 578         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 579
 580         return((p == NULL)?NULL:p->string);
 581         }
 582
 583 const char *ERR_func_error_string(unsigned long e)
 584         {
 585         ERR_STRING_DATA d,*p=NULL;
 586         unsigned long l,f;
 587
 588         l=ERR_GET_LIB(e);
 589         f=ERR_GET_FUNC(e);
 590
 591         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 592
 593         if (error_hash != NULL)
 594                 {
 595                 d.error=ERR_PACK(l,f,0);
 596                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 597                 }
 598
 599         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 600
 601         return((p == NULL)?NULL:p->string);
 602         }
 603
 604 const char *ERR_reason_error_string(unsigned long e)
 605         {
 606         ERR_STRING_DATA d,*p=NULL;
 607         unsigned long l,r;
 608
 609         l=ERR_GET_LIB(e);
 610         r=ERR_GET_REASON(e);
 611
 612         CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
 613
 614         if (error_hash != NULL)
 615                 {
 616                 d.error=ERR_PACK(l,0,r);
 617                 p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 618                 if (p == NULL)
 619                         {
 620                         d.error=ERR_PACK(0,0,r);
 621                         p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
 622                         }
 623                 }
 624
 625         CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
 626
 627         return((p == NULL)?NULL:p->string);
 628         }
 629
 630 static unsigned long err_hash(ERR_STRING_DATA *a)
 631         {
 632         unsigned long ret,l;
 633
 634         l=a->error;
 635         ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
 636         return(ret^ret%19*13);
 637         }
 638
 639 static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b)
 640         {
 641         return((int)(a->error-b->error));
 642         }
 643
 644 static unsigned long pid_hash(ERR_STATE *a)
 645         {
 646         return(a->pid*13);
 647         }
 648
 649 static int pid_cmp(ERR_STATE *a, ERR_STATE *b)
 650         {
 651         return((int)((long)a->pid - (long)b->pid));
 652         }
 653
 654 void ERR_remove_state(unsigned long pid)
 655         {
 656         ERR_STATE *p = NULL,tmp;
 657
 658         if (thread_hash == NULL)
 659                 return;
 660         if (pid == 0)
 661                 pid=(unsigned long)CRYPTO_thread_id();
 662         tmp.pid=pid;
 663         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 664         if (thread_hash)
 665                 {
 666                 p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
 667                 if (lh_num_items(thread_hash) == 0)
 668                         {
 669                         /* make sure we don't leak memory */
 670                         lh_free(thread_hash);
 671                         thread_hash = NULL;
 672                         }
 673                 }
 674         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 675
 676         if (p != NULL) ERR_STATE_free(p);
 677         }
 678
 679 ERR_STATE *ERR_get_state(void)
 680         {
 681         static ERR_STATE fallback;
 682         ERR_STATE *ret=NULL,tmp,*tmpp=NULL;
 683         int thread_state_exists;
 684         int i;
 685         unsigned long pid;
 686
 687         pid=(unsigned long)CRYPTO_thread_id();
 688
 689         CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 690         if (thread_hash != NULL)
 691                 {
 692                 tmp.pid=pid;
 693                 ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
 694                 }
 695         CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 696
 697         /* ret == the error state, if NULL, make a new one */
 698         if (ret == NULL)
 699                 {
 700                 ret=(ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
 701                 if (ret == NULL) return(&fallback);
 702                 ret->pid=pid;
 703                 ret->top=0;
 704                 ret->bottom=0;
 705                 for (i=0; i<ERR_NUM_ERRORS; i++)
 706                         {
 707                         ret->err_data[i]=NULL;
 708                         ret->err_data_flags[i]=0;
 709                         }
 710
 711                 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
 712
 713                 /* no entry yet in thread_hash for current thread -
 714                  * thus, it may have changed since we last looked at it */
 715                 if (thread_hash == NULL)
 716                         thread_hash = lh_new(LHASH_HASH_FN(pid_hash),
 717                                         LHASH_COMP_FN(pid_cmp));
 718                 if (thread_hash == NULL)
 719                         thread_state_exists = 0; /* allocation error */
 720                 else
 721                         {
 722                         tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
 723                         thread_state_exists = 1;
 724                         }
 725
 726                 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
 727
 728                 if (!thread_state_exists)
 729                         {
 730                         ERR_STATE_free(ret); /* could not insert it */
 731                         return(&fallback);
 732                         }
 733
 734                 if (tmpp != NULL) /* old entry - should not happen */
 735                         {
 736                         ERR_STATE_free(tmpp);
 737                         }
 738                 }
 739         return(ret);
 740         }
 741
 742 int ERR_get_next_error_library(void)
 743         {
 744         static int value=ERR_LIB_USER;
 745
 746         return(value++);
 747         }
 748
 749 void ERR_set_error_data(char *data, int flags)
 750         {
 751         ERR_STATE *es;
 752         int i;
 753
 754         es=ERR_get_state();
 755
 756         i=es->top;
 757         if (i == 0)
 758                 i=ERR_NUM_ERRORS-1;
 759
 760         es->err_data[i]=data;
 761         es->err_data_flags[es->top]=flags;
 762         }
 763
 764 void ERR_add_error_data(int num, ...)
 765         {
 766         va_list args;
 767         int i,n,s;
 768         char *str,*p,*a;
 769
 770         s=64;
 771         str=OPENSSL_malloc(s+1);
 772         if (str == NULL) return;
 773         str[0]='\0';
 774
 775         va_start(args, num);
 776         n=0;
 777         for (i=0; i<num; i++)
 778                 {
 779                 a=va_arg(args, char*);
 780                 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 781                 if (a != NULL)
 782                         {
 783                         n+=strlen(a);
 784                         if (n > s)
 785                                 {
 786                                 s=n+20;
 787                                 p=OPENSSL_realloc(str,s+1);
 788                                 if (p == NULL)
 789                                         {
 790                                         OPENSSL_free(str);
 791                                         return;
 792                                         }
 793                                 else
 794                                         str=p;
 795                                 }
 796                         strcat(str,a);
 797                         }
 798                 }
 799         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
 800
 801         va_end(args);
 802         }
 803