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      1 /* crypto/err/err.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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) 1998-2006 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 (at) 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 (at) cryptsoft.com).  This product includes software written by Tim
    108  * Hudson (tjh (at) cryptsoft.com).
    109  *
    110  */
    111 
    112 #include <stdio.h>
    113 #include <stdarg.h>
    114 #include <string.h>
    115 #include "cryptlib.h"
    116 #include <openssl/lhash.h>
    117 #include <openssl/crypto.h>
    118 #include <openssl/buffer.h>
    119 #include <openssl/bio.h>
    120 #include <openssl/err.h>
    121 
    122 DECLARE_LHASH_OF(ERR_STRING_DATA);
    123 DECLARE_LHASH_OF(ERR_STATE);
    124 
    125 static void err_load_strings(int lib, ERR_STRING_DATA *str);
    126 
    127 static void ERR_STATE_free(ERR_STATE *s);
    128 #ifndef OPENSSL_NO_ERR
    129 static ERR_STRING_DATA ERR_str_libraries[]=
    130 	{
    131 {ERR_PACK(ERR_LIB_NONE,0,0)		,"unknown library"},
    132 {ERR_PACK(ERR_LIB_SYS,0,0)		,"system library"},
    133 {ERR_PACK(ERR_LIB_BN,0,0)		,"bignum routines"},
    134 {ERR_PACK(ERR_LIB_RSA,0,0)		,"rsa routines"},
    135 {ERR_PACK(ERR_LIB_DH,0,0)		,"Diffie-Hellman routines"},
    136 {ERR_PACK(ERR_LIB_EVP,0,0)		,"digital envelope routines"},
    137 {ERR_PACK(ERR_LIB_BUF,0,0)		,"memory buffer routines"},
    138 {ERR_PACK(ERR_LIB_OBJ,0,0)		,"object identifier routines"},
    139 {ERR_PACK(ERR_LIB_PEM,0,0)		,"PEM routines"},
    140 {ERR_PACK(ERR_LIB_DSA,0,0)		,"dsa routines"},
    141 {ERR_PACK(ERR_LIB_X509,0,0)		,"x509 certificate routines"},
    142 {ERR_PACK(ERR_LIB_ASN1,0,0)		,"asn1 encoding routines"},
    143 {ERR_PACK(ERR_LIB_CONF,0,0)		,"configuration file routines"},
    144 {ERR_PACK(ERR_LIB_CRYPTO,0,0)		,"common libcrypto routines"},
    145 {ERR_PACK(ERR_LIB_EC,0,0)		,"elliptic curve routines"},
    146 {ERR_PACK(ERR_LIB_SSL,0,0)		,"SSL routines"},
    147 {ERR_PACK(ERR_LIB_BIO,0,0)		,"BIO routines"},
    148 {ERR_PACK(ERR_LIB_PKCS7,0,0)		,"PKCS7 routines"},
    149 {ERR_PACK(ERR_LIB_X509V3,0,0)		,"X509 V3 routines"},
    150 {ERR_PACK(ERR_LIB_PKCS12,0,0)		,"PKCS12 routines"},
    151 {ERR_PACK(ERR_LIB_RAND,0,0)		,"random number generator"},
    152 {ERR_PACK(ERR_LIB_DSO,0,0)		,"DSO support routines"},
    153 {ERR_PACK(ERR_LIB_TS,0,0)		,"time stamp routines"},
    154 {ERR_PACK(ERR_LIB_ENGINE,0,0)		,"engine routines"},
    155 {ERR_PACK(ERR_LIB_OCSP,0,0)		,"OCSP routines"},
    156 {ERR_PACK(ERR_LIB_FIPS,0,0)		,"FIPS routines"},
    157 {ERR_PACK(ERR_LIB_CMS,0,0)		,"CMS routines"},
    158 {ERR_PACK(ERR_LIB_HMAC,0,0)		,"HMAC routines"},
    159 {0,NULL},
    160 	};
    161 
    162 static ERR_STRING_DATA ERR_str_functs[]=
    163 	{
    164 	{ERR_PACK(0,SYS_F_FOPEN,0),     	"fopen"},
    165 	{ERR_PACK(0,SYS_F_CONNECT,0),		"connect"},
    166 	{ERR_PACK(0,SYS_F_GETSERVBYNAME,0),	"getservbyname"},
    167 	{ERR_PACK(0,SYS_F_SOCKET,0),		"socket"},
    168 	{ERR_PACK(0,SYS_F_IOCTLSOCKET,0),	"ioctlsocket"},
    169 	{ERR_PACK(0,SYS_F_BIND,0),		"bind"},
    170 	{ERR_PACK(0,SYS_F_LISTEN,0),		"listen"},
    171 	{ERR_PACK(0,SYS_F_ACCEPT,0),		"accept"},
    172 #ifdef OPENSSL_SYS_WINDOWS
    173 	{ERR_PACK(0,SYS_F_WSASTARTUP,0),	"WSAstartup"},
    174 #endif
    175 	{ERR_PACK(0,SYS_F_OPENDIR,0),		"opendir"},
    176 	{ERR_PACK(0,SYS_F_FREAD,0),		"fread"},
    177 	{0,NULL},
    178 	};
    179 
    180 static ERR_STRING_DATA ERR_str_reasons[]=
    181 	{
    182 {ERR_R_SYS_LIB				,"system lib"},
    183 {ERR_R_BN_LIB				,"BN lib"},
    184 {ERR_R_RSA_LIB				,"RSA lib"},
    185 {ERR_R_DH_LIB				,"DH lib"},
    186 {ERR_R_EVP_LIB				,"EVP lib"},
    187 {ERR_R_BUF_LIB				,"BUF lib"},
    188 {ERR_R_OBJ_LIB				,"OBJ lib"},
    189 {ERR_R_PEM_LIB				,"PEM lib"},
    190 {ERR_R_DSA_LIB				,"DSA lib"},
    191 {ERR_R_X509_LIB				,"X509 lib"},
    192 {ERR_R_ASN1_LIB				,"ASN1 lib"},
    193 {ERR_R_CONF_LIB				,"CONF lib"},
    194 {ERR_R_CRYPTO_LIB			,"CRYPTO lib"},
    195 {ERR_R_EC_LIB				,"EC lib"},
    196 {ERR_R_SSL_LIB				,"SSL lib"},
    197 {ERR_R_BIO_LIB				,"BIO lib"},
    198 {ERR_R_PKCS7_LIB			,"PKCS7 lib"},
    199 {ERR_R_X509V3_LIB			,"X509V3 lib"},
    200 {ERR_R_PKCS12_LIB			,"PKCS12 lib"},
    201 {ERR_R_RAND_LIB				,"RAND lib"},
    202 {ERR_R_DSO_LIB				,"DSO lib"},
    203 {ERR_R_ENGINE_LIB			,"ENGINE lib"},
    204 {ERR_R_OCSP_LIB				,"OCSP lib"},
    205 {ERR_R_TS_LIB				,"TS lib"},
    206 
    207 {ERR_R_NESTED_ASN1_ERROR		,"nested asn1 error"},
    208 {ERR_R_BAD_ASN1_OBJECT_HEADER		,"bad asn1 object header"},
    209 {ERR_R_BAD_GET_ASN1_OBJECT_CALL		,"bad get asn1 object call"},
    210 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE	,"expecting an asn1 sequence"},
    211 {ERR_R_ASN1_LENGTH_MISMATCH		,"asn1 length mismatch"},
    212 {ERR_R_MISSING_ASN1_EOS			,"missing asn1 eos"},
    213 
    214 {ERR_R_FATAL                            ,"fatal"},
    215 {ERR_R_MALLOC_FAILURE			,"malloc failure"},
    216 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED	,"called a function you should not call"},
    217 {ERR_R_PASSED_NULL_PARAMETER		,"passed a null parameter"},
    218 {ERR_R_INTERNAL_ERROR			,"internal error"},
    219 {ERR_R_DISABLED				,"called a function that was disabled at compile-time"},
    220 
    221 {0,NULL},
    222 	};
    223 #endif
    224 
    225 
    226 /* Define the predeclared (but externally opaque) "ERR_FNS" type */
    227 struct st_ERR_FNS
    228 	{
    229 	/* Works on the "error_hash" string table */
    230 	LHASH_OF(ERR_STRING_DATA) *(*cb_err_get)(int create);
    231 	void (*cb_err_del)(void);
    232 	ERR_STRING_DATA *(*cb_err_get_item)(const ERR_STRING_DATA *);
    233 	ERR_STRING_DATA *(*cb_err_set_item)(ERR_STRING_DATA *);
    234 	ERR_STRING_DATA *(*cb_err_del_item)(ERR_STRING_DATA *);
    235 	/* Works on the "thread_hash" error-state table */
    236 	LHASH_OF(ERR_STATE) *(*cb_thread_get)(int create);
    237 	void (*cb_thread_release)(LHASH_OF(ERR_STATE) **hash);
    238 	ERR_STATE *(*cb_thread_get_item)(const ERR_STATE *);
    239 	ERR_STATE *(*cb_thread_set_item)(ERR_STATE *);
    240 	void (*cb_thread_del_item)(const ERR_STATE *);
    241 	/* Returns the next available error "library" numbers */
    242 	int (*cb_get_next_lib)(void);
    243 	};
    244 
    245 /* Predeclarations of the "err_defaults" functions */
    246 static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create);
    247 static void int_err_del(void);
    248 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
    249 static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *);
    250 static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *);
    251 static LHASH_OF(ERR_STATE) *int_thread_get(int create);
    252 static void int_thread_release(LHASH_OF(ERR_STATE) **hash);
    253 static ERR_STATE *int_thread_get_item(const ERR_STATE *);
    254 static ERR_STATE *int_thread_set_item(ERR_STATE *);
    255 static void int_thread_del_item(const ERR_STATE *);
    256 static int int_err_get_next_lib(void);
    257 /* The static ERR_FNS table using these defaults functions */
    258 static const ERR_FNS err_defaults =
    259 	{
    260 	int_err_get,
    261 	int_err_del,
    262 	int_err_get_item,
    263 	int_err_set_item,
    264 	int_err_del_item,
    265 	int_thread_get,
    266 	int_thread_release,
    267 	int_thread_get_item,
    268 	int_thread_set_item,
    269 	int_thread_del_item,
    270 	int_err_get_next_lib
    271 	};
    272 
    273 /* The replacable table of ERR_FNS functions we use at run-time */
    274 static const ERR_FNS *err_fns = NULL;
    275 
    276 /* Eg. rather than using "err_get()", use "ERRFN(err_get)()". */
    277 #define ERRFN(a) err_fns->cb_##a
    278 
    279 /* The internal state used by "err_defaults" - as such, the setting, reading,
    280  * creating, and deleting of this data should only be permitted via the
    281  * "err_defaults" functions. This way, a linked module can completely defer all
    282  * ERR state operation (together with requisite locking) to the implementations
    283  * and state in the loading application. */
    284 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
    285 static LHASH_OF(ERR_STATE) *int_thread_hash = NULL;
    286 static int int_thread_hash_references = 0;
    287 static int int_err_library_number= ERR_LIB_USER;
    288 
    289 /* Internal function that checks whether "err_fns" is set and if not, sets it to
    290  * the defaults. */
    291 static void err_fns_check(void)
    292 	{
    293 	if (err_fns) return;
    294 
    295 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    296 	if (!err_fns)
    297 		err_fns = &err_defaults;
    298 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    299 	}
    300 
    301 /* API functions to get or set the underlying ERR functions. */
    302 
    303 const ERR_FNS *ERR_get_implementation(void)
    304 	{
    305 	err_fns_check();
    306 	return err_fns;
    307 	}
    308 
    309 int ERR_set_implementation(const ERR_FNS *fns)
    310 	{
    311 	int ret = 0;
    312 
    313 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    314 	/* It's too late if 'err_fns' is non-NULL. BTW: not much point setting
    315 	 * an error is there?! */
    316 	if (!err_fns)
    317 		{
    318 		err_fns = fns;
    319 		ret = 1;
    320 		}
    321 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    322 	return ret;
    323 	}
    324 
    325 /* These are the callbacks provided to "lh_new()" when creating the LHASH tables
    326  * internal to the "err_defaults" implementation. */
    327 
    328 static unsigned long get_error_values(int inc,int top,const char **file,int *line,
    329 				      const char **data,int *flags);
    330 
    331 /* The internal functions used in the "err_defaults" implementation */
    332 
    333 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
    334 	{
    335 	unsigned long ret,l;
    336 
    337 	l=a->error;
    338 	ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
    339 	return(ret^ret%19*13);
    340 	}
    341 static IMPLEMENT_LHASH_HASH_FN(err_string_data, ERR_STRING_DATA)
    342 
    343 static int err_string_data_cmp(const ERR_STRING_DATA *a,
    344 			       const ERR_STRING_DATA *b)
    345 	{
    346 	return (int)(a->error - b->error);
    347 	}
    348 static IMPLEMENT_LHASH_COMP_FN(err_string_data, ERR_STRING_DATA)
    349 
    350 static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create)
    351 	{
    352 	LHASH_OF(ERR_STRING_DATA) *ret = NULL;
    353 
    354 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    355 	if (!int_error_hash && create)
    356 		{
    357 		CRYPTO_push_info("int_err_get (err.c)");
    358 		int_error_hash = lh_ERR_STRING_DATA_new();
    359 		CRYPTO_pop_info();
    360 		}
    361 	if (int_error_hash)
    362 		ret = int_error_hash;
    363 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    364 
    365 	return ret;
    366 	}
    367 
    368 static void int_err_del(void)
    369 	{
    370 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    371 	if (int_error_hash)
    372 		{
    373 		lh_ERR_STRING_DATA_free(int_error_hash);
    374 		int_error_hash = NULL;
    375 		}
    376 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    377 	}
    378 
    379 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
    380 	{
    381 	ERR_STRING_DATA *p;
    382 	LHASH_OF(ERR_STRING_DATA) *hash;
    383 
    384 	err_fns_check();
    385 	hash = ERRFN(err_get)(0);
    386 	if (!hash)
    387 		return NULL;
    388 
    389 	CRYPTO_r_lock(CRYPTO_LOCK_ERR);
    390 	p = lh_ERR_STRING_DATA_retrieve(hash, d);
    391 	CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
    392 
    393 	return p;
    394 	}
    395 
    396 static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *d)
    397 	{
    398 	ERR_STRING_DATA *p;
    399 	LHASH_OF(ERR_STRING_DATA) *hash;
    400 
    401 	err_fns_check();
    402 	hash = ERRFN(err_get)(1);
    403 	if (!hash)
    404 		return NULL;
    405 
    406 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    407 	p = lh_ERR_STRING_DATA_insert(hash, d);
    408 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    409 
    410 	return p;
    411 	}
    412 
    413 static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *d)
    414 	{
    415 	ERR_STRING_DATA *p;
    416 	LHASH_OF(ERR_STRING_DATA) *hash;
    417 
    418 	err_fns_check();
    419 	hash = ERRFN(err_get)(0);
    420 	if (!hash)
    421 		return NULL;
    422 
    423 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    424 	p = lh_ERR_STRING_DATA_delete(hash, d);
    425 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    426 
    427 	return p;
    428 	}
    429 
    430 static unsigned long err_state_hash(const ERR_STATE *a)
    431 	{
    432 	return CRYPTO_THREADID_hash(&a->tid) * 13;
    433 	}
    434 static IMPLEMENT_LHASH_HASH_FN(err_state, ERR_STATE)
    435 
    436 static int err_state_cmp(const ERR_STATE *a, const ERR_STATE *b)
    437 	{
    438 	return CRYPTO_THREADID_cmp(&a->tid, &b->tid);
    439 	}
    440 static IMPLEMENT_LHASH_COMP_FN(err_state, ERR_STATE)
    441 
    442 static LHASH_OF(ERR_STATE) *int_thread_get(int create)
    443 	{
    444 	LHASH_OF(ERR_STATE) *ret = NULL;
    445 
    446 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    447 	if (!int_thread_hash && create)
    448 		{
    449 		CRYPTO_push_info("int_thread_get (err.c)");
    450 		int_thread_hash = lh_ERR_STATE_new();
    451 		CRYPTO_pop_info();
    452 		}
    453 	if (int_thread_hash)
    454 		{
    455 		int_thread_hash_references++;
    456 		ret = int_thread_hash;
    457 		}
    458 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    459 	return ret;
    460 	}
    461 
    462 static void int_thread_release(LHASH_OF(ERR_STATE) **hash)
    463 	{
    464 	int i;
    465 
    466 	if (hash == NULL || *hash == NULL)
    467 		return;
    468 
    469 	i = CRYPTO_add(&int_thread_hash_references, -1, CRYPTO_LOCK_ERR);
    470 
    471 #ifdef REF_PRINT
    472 	fprintf(stderr,"%4d:%s\n",int_thread_hash_references,"ERR");
    473 #endif
    474 	if (i > 0) return;
    475 #ifdef REF_CHECK
    476 	if (i < 0)
    477 		{
    478 		fprintf(stderr,"int_thread_release, bad reference count\n");
    479 		abort(); /* ok */
    480 		}
    481 #endif
    482 	*hash = NULL;
    483 	}
    484 
    485 static ERR_STATE *int_thread_get_item(const ERR_STATE *d)
    486 	{
    487 	ERR_STATE *p;
    488 	LHASH_OF(ERR_STATE) *hash;
    489 
    490 	err_fns_check();
    491 	hash = ERRFN(thread_get)(0);
    492 	if (!hash)
    493 		return NULL;
    494 
    495 	CRYPTO_r_lock(CRYPTO_LOCK_ERR);
    496 	p = lh_ERR_STATE_retrieve(hash, d);
    497 	CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
    498 
    499 	ERRFN(thread_release)(&hash);
    500 	return p;
    501 	}
    502 
    503 static ERR_STATE *int_thread_set_item(ERR_STATE *d)
    504 	{
    505 	ERR_STATE *p;
    506 	LHASH_OF(ERR_STATE) *hash;
    507 
    508 	err_fns_check();
    509 	hash = ERRFN(thread_get)(1);
    510 	if (!hash)
    511 		return NULL;
    512 
    513 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    514 	p = lh_ERR_STATE_insert(hash, d);
    515 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    516 
    517 	ERRFN(thread_release)(&hash);
    518 	return p;
    519 	}
    520 
    521 static void int_thread_del_item(const ERR_STATE *d)
    522 	{
    523 	ERR_STATE *p;
    524 	LHASH_OF(ERR_STATE) *hash;
    525 
    526 	err_fns_check();
    527 	hash = ERRFN(thread_get)(0);
    528 	if (!hash)
    529 		return;
    530 
    531 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    532 	p = lh_ERR_STATE_delete(hash, d);
    533 	/* make sure we don't leak memory */
    534 	if (int_thread_hash_references == 1
    535 	    && int_thread_hash && lh_ERR_STATE_num_items(int_thread_hash) == 0)
    536 		{
    537 		lh_ERR_STATE_free(int_thread_hash);
    538 		int_thread_hash = NULL;
    539 		}
    540 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    541 
    542 	ERRFN(thread_release)(&hash);
    543 	if (p)
    544 		ERR_STATE_free(p);
    545 	}
    546 
    547 static int int_err_get_next_lib(void)
    548 	{
    549 	int ret;
    550 
    551 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    552 	ret = int_err_library_number++;
    553 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    554 
    555 	return ret;
    556 	}
    557 
    558 
    559 #ifndef OPENSSL_NO_ERR
    560 #define NUM_SYS_STR_REASONS 127
    561 #define LEN_SYS_STR_REASON 32
    562 
    563 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
    564 /* SYS_str_reasons is filled with copies of strerror() results at
    565  * initialization.
    566  * 'errno' values up to 127 should cover all usual errors,
    567  * others will be displayed numerically by ERR_error_string.
    568  * It is crucial that we have something for each reason code
    569  * that occurs in ERR_str_reasons, or bogus reason strings
    570  * will be returned for SYSerr(), which always gets an errno
    571  * value and never one of those 'standard' reason codes. */
    572 
    573 static void build_SYS_str_reasons(void)
    574 	{
    575 	/* OPENSSL_malloc cannot be used here, use static storage instead */
    576 	static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
    577 	int i;
    578 	static int init = 1;
    579 
    580 	CRYPTO_r_lock(CRYPTO_LOCK_ERR);
    581 	if (!init)
    582 		{
    583 		CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
    584 		return;
    585 		}
    586 
    587 	CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
    588 	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
    589 	if (!init)
    590 		{
    591 		CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    592 		return;
    593 		}
    594 
    595 	for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
    596 		{
    597 		ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
    598 
    599 		str->error = (unsigned long)i;
    600 		if (str->string == NULL)
    601 			{
    602 			char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
    603 			char *src = strerror(i);
    604 			if (src != NULL)
    605 				{
    606 				strncpy(*dest, src, sizeof *dest);
    607 				(*dest)[sizeof *dest - 1] = '\0';
    608 				str->string = *dest;
    609 				}
    610 			}
    611 		if (str->string == NULL)
    612 			str->string = "unknown";
    613 		}
    614 
    615 	/* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
    616 	 * as required by ERR_load_strings. */
    617 
    618 	init = 0;
    619 
    620 	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
    621 	}
    622 #endif
    623 
    624 #define err_clear_data(p,i) \
    625 	do { \
    626 	if (((p)->err_data[i] != NULL) && \
    627 		(p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
    628 		{  \
    629 		OPENSSL_free((p)->err_data[i]); \
    630 		(p)->err_data[i]=NULL; \
    631 		} \
    632 	(p)->err_data_flags[i]=0; \
    633 	} while(0)
    634 
    635 #define err_clear(p,i) \
    636 	do { \
    637 	(p)->err_flags[i]=0; \
    638 	(p)->err_buffer[i]=0; \
    639 	err_clear_data(p,i); \
    640 	(p)->err_file[i]=NULL; \
    641 	(p)->err_line[i]= -1; \
    642 	} while(0)
    643 
    644 static void ERR_STATE_free(ERR_STATE *s)
    645 	{
    646 	int i;
    647 
    648 	if (s == NULL)
    649 	    return;
    650 
    651 	for (i=0; i<ERR_NUM_ERRORS; i++)
    652 		{
    653 		err_clear_data(s,i);
    654 		}
    655 	OPENSSL_free(s);
    656 	}
    657 
    658 void ERR_load_ERR_strings(void)
    659 	{
    660 	err_fns_check();
    661 #ifndef OPENSSL_NO_ERR
    662 	err_load_strings(0,ERR_str_libraries);
    663 	err_load_strings(0,ERR_str_reasons);
    664 	err_load_strings(ERR_LIB_SYS,ERR_str_functs);
    665 	build_SYS_str_reasons();
    666 	err_load_strings(ERR_LIB_SYS,SYS_str_reasons);
    667 #endif
    668 	}
    669 
    670 static void err_load_strings(int lib, ERR_STRING_DATA *str)
    671 	{
    672 	while (str->error)
    673 		{
    674 		if (lib)
    675 			str->error|=ERR_PACK(lib,0,0);
    676 		ERRFN(err_set_item)(str);
    677 		str++;
    678 		}
    679 	}
    680 
    681 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
    682 	{
    683 	ERR_load_ERR_strings();
    684 	err_load_strings(lib, str);
    685 	}
    686 
    687 void ERR_unload_strings(int lib, ERR_STRING_DATA *str)
    688 	{
    689 	while (str->error)
    690 		{
    691 		if (lib)
    692 			str->error|=ERR_PACK(lib,0,0);
    693 		ERRFN(err_del_item)(str);
    694 		str++;
    695 		}
    696 	}
    697 
    698 void ERR_free_strings(void)
    699 	{
    700 	err_fns_check();
    701 	ERRFN(err_del)();
    702 	}
    703 
    704 /********************************************************/
    705 
    706 void ERR_put_error(int lib, int func, int reason, const char *file,
    707 	     int line)
    708 	{
    709 	ERR_STATE *es;
    710 
    711 #ifdef _OSD_POSIX
    712 	/* In the BS2000-OSD POSIX subsystem, the compiler generates
    713 	 * path names in the form "*POSIX(/etc/passwd)".
    714 	 * This dirty hack strips them to something sensible.
    715 	 * @@@ We shouldn't modify a const string, though.
    716 	 */
    717 	if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
    718 		char *end;
    719 
    720 		/* Skip the "*POSIX(" prefix */
    721 		file += sizeof("*POSIX(")-1;
    722 		end = &file[strlen(file)-1];
    723 		if (*end == ')')
    724 			*end = '\0';
    725 		/* Optional: use the basename of the path only. */
    726 		if ((end = strrchr(file, '/')) != NULL)
    727 			file = &end[1];
    728 	}
    729 #endif
    730 	es=ERR_get_state();
    731 
    732 	es->top=(es->top+1)%ERR_NUM_ERRORS;
    733 	if (es->top == es->bottom)
    734 		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
    735 	es->err_flags[es->top]=0;
    736 	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
    737 	es->err_file[es->top]=file;
    738 	es->err_line[es->top]=line;
    739 	err_clear_data(es,es->top);
    740 	}
    741 
    742 void ERR_clear_error(void)
    743 	{
    744 	int i;
    745 	ERR_STATE *es;
    746 
    747 	es=ERR_get_state();
    748 
    749 	for (i=0; i<ERR_NUM_ERRORS; i++)
    750 		{
    751 		err_clear(es,i);
    752 		}
    753 	es->top=es->bottom=0;
    754 	}
    755 
    756 
    757 unsigned long ERR_get_error(void)
    758 	{ return(get_error_values(1,0,NULL,NULL,NULL,NULL)); }
    759 
    760 unsigned long ERR_get_error_line(const char **file,
    761 	     int *line)
    762 	{ return(get_error_values(1,0,file,line,NULL,NULL)); }
    763 
    764 unsigned long ERR_get_error_line_data(const char **file, int *line,
    765 	     const char **data, int *flags)
    766 	{ return(get_error_values(1,0,file,line,data,flags)); }
    767 
    768 
    769 unsigned long ERR_peek_error(void)
    770 	{ return(get_error_values(0,0,NULL,NULL,NULL,NULL)); }
    771 
    772 unsigned long ERR_peek_error_line(const char **file, int *line)
    773 	{ return(get_error_values(0,0,file,line,NULL,NULL)); }
    774 
    775 unsigned long ERR_peek_error_line_data(const char **file, int *line,
    776 	     const char **data, int *flags)
    777 	{ return(get_error_values(0,0,file,line,data,flags)); }
    778 
    779 
    780 unsigned long ERR_peek_last_error(void)
    781 	{ return(get_error_values(0,1,NULL,NULL,NULL,NULL)); }
    782 
    783 unsigned long ERR_peek_last_error_line(const char **file, int *line)
    784 	{ return(get_error_values(0,1,file,line,NULL,NULL)); }
    785 
    786 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
    787 	     const char **data, int *flags)
    788 	{ return(get_error_values(0,1,file,line,data,flags)); }
    789 
    790 
    791 static unsigned long get_error_values(int inc, int top, const char **file, int *line,
    792 	     const char **data, int *flags)
    793 	{
    794 	int i=0;
    795 	ERR_STATE *es;
    796 	unsigned long ret;
    797 
    798 	es=ERR_get_state();
    799 
    800 	if (inc && top)
    801 		{
    802 		if (file) *file = "";
    803 		if (line) *line = 0;
    804 		if (data) *data = "";
    805 		if (flags) *flags = 0;
    806 
    807 		return ERR_R_INTERNAL_ERROR;
    808 		}
    809 
    810 	if (es->bottom == es->top) return 0;
    811 	if (top)
    812 		i=es->top;			 /* last error */
    813 	else
    814 		i=(es->bottom+1)%ERR_NUM_ERRORS; /* first error */
    815 
    816 	ret=es->err_buffer[i];
    817 	if (inc)
    818 		{
    819 		es->bottom=i;
    820 		es->err_buffer[i]=0;
    821 		}
    822 
    823 	if ((file != NULL) && (line != NULL))
    824 		{
    825 		if (es->err_file[i] == NULL)
    826 			{
    827 			*file="NA";
    828 			if (line != NULL) *line=0;
    829 			}
    830 		else
    831 			{
    832 			*file=es->err_file[i];
    833 			if (line != NULL) *line=es->err_line[i];
    834 			}
    835 		}
    836 
    837 	if (data == NULL)
    838 		{
    839 		if (inc)
    840 			{
    841 			err_clear_data(es, i);
    842 			}
    843 		}
    844 	else
    845 		{
    846 		if (es->err_data[i] == NULL)
    847 			{
    848 			*data="";
    849 			if (flags != NULL) *flags=0;
    850 			}
    851 		else
    852 			{
    853 			*data=es->err_data[i];
    854 			if (flags != NULL) *flags=es->err_data_flags[i];
    855 			}
    856 		}
    857 	return ret;
    858 	}
    859 
    860 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
    861 	{
    862 	char lsbuf[64], fsbuf[64], rsbuf[64];
    863 	const char *ls,*fs,*rs;
    864 	unsigned long l,f,r;
    865 
    866 	l=ERR_GET_LIB(e);
    867 	f=ERR_GET_FUNC(e);
    868 	r=ERR_GET_REASON(e);
    869 
    870 	ls=ERR_lib_error_string(e);
    871 	fs=ERR_func_error_string(e);
    872 	rs=ERR_reason_error_string(e);
    873 
    874 	if (ls == NULL)
    875 		BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
    876 	if (fs == NULL)
    877 		BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
    878 	if (rs == NULL)
    879 		BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
    880 
    881 	BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf,
    882 		fs?fs:fsbuf, rs?rs:rsbuf);
    883 	if (strlen(buf) == len-1)
    884 		{
    885 		/* output may be truncated; make sure we always have 5
    886 		 * colon-separated fields, i.e. 4 colons ... */
    887 #define NUM_COLONS 4
    888 		if (len > NUM_COLONS) /* ... if possible */
    889 			{
    890 			int i;
    891 			char *s = buf;
    892 
    893 			for (i = 0; i < NUM_COLONS; i++)
    894 				{
    895 				char *colon = strchr(s, ':');
    896 				if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
    897 					{
    898 					/* set colon no. i at last possible position
    899 					 * (buf[len-1] is the terminating 0)*/
    900 					colon = &buf[len-1] - NUM_COLONS + i;
    901 					*colon = ':';
    902 					}
    903 				s = colon + 1;
    904 				}
    905 			}
    906 		}
    907 	}
    908 
    909 /* BAD for multi-threading: uses a local buffer if ret == NULL */
    910 /* ERR_error_string_n should be used instead for ret != NULL
    911  * as ERR_error_string cannot know how large the buffer is */
    912 char *ERR_error_string(unsigned long e, char *ret)
    913 	{
    914 	static char buf[256];
    915 
    916 	if (ret == NULL) ret=buf;
    917 	ERR_error_string_n(e, ret, 256);
    918 
    919 	return ret;
    920 	}
    921 
    922 LHASH_OF(ERR_STRING_DATA) *ERR_get_string_table(void)
    923 	{
    924 	err_fns_check();
    925 	return ERRFN(err_get)(0);
    926 	}
    927 
    928 LHASH_OF(ERR_STATE) *ERR_get_err_state_table(void)
    929 	{
    930 	err_fns_check();
    931 	return ERRFN(thread_get)(0);
    932 	}
    933 
    934 void ERR_release_err_state_table(LHASH_OF(ERR_STATE) **hash)
    935 	{
    936 	err_fns_check();
    937 	ERRFN(thread_release)(hash);
    938 	}
    939 
    940 const char *ERR_lib_error_string(unsigned long e)
    941 	{
    942 	ERR_STRING_DATA d,*p;
    943 	unsigned long l;
    944 
    945 	err_fns_check();
    946 	l=ERR_GET_LIB(e);
    947 	d.error=ERR_PACK(l,0,0);
    948 	p=ERRFN(err_get_item)(&d);
    949 	return((p == NULL)?NULL:p->string);
    950 	}
    951 
    952 const char *ERR_func_error_string(unsigned long e)
    953 	{
    954 	ERR_STRING_DATA d,*p;
    955 	unsigned long l,f;
    956 
    957 	err_fns_check();
    958 	l=ERR_GET_LIB(e);
    959 	f=ERR_GET_FUNC(e);
    960 	d.error=ERR_PACK(l,f,0);
    961 	p=ERRFN(err_get_item)(&d);
    962 	return((p == NULL)?NULL:p->string);
    963 	}
    964 
    965 const char *ERR_reason_error_string(unsigned long e)
    966 	{
    967 	ERR_STRING_DATA d,*p=NULL;
    968 	unsigned long l,r;
    969 
    970 	err_fns_check();
    971 	l=ERR_GET_LIB(e);
    972 	r=ERR_GET_REASON(e);
    973 	d.error=ERR_PACK(l,0,r);
    974 	p=ERRFN(err_get_item)(&d);
    975 	if (!p)
    976 		{
    977 		d.error=ERR_PACK(0,0,r);
    978 		p=ERRFN(err_get_item)(&d);
    979 		}
    980 	return((p == NULL)?NULL:p->string);
    981 	}
    982 
    983 void ERR_remove_thread_state(const CRYPTO_THREADID *id)
    984 	{
    985 	ERR_STATE tmp;
    986 
    987 	if (id)
    988 		CRYPTO_THREADID_cpy(&tmp.tid, id);
    989 	else
    990 		CRYPTO_THREADID_current(&tmp.tid);
    991 	err_fns_check();
    992 	/* thread_del_item automatically destroys the LHASH if the number of
    993 	 * items reaches zero. */
    994 	ERRFN(thread_del_item)(&tmp);
    995 	}
    996 
    997 #ifndef OPENSSL_NO_DEPRECATED
    998 void ERR_remove_state(unsigned long pid)
    999 	{
   1000 	ERR_remove_thread_state(NULL);
   1001 	}
   1002 #endif
   1003 
   1004 ERR_STATE *ERR_get_state(void)
   1005 	{
   1006 	static ERR_STATE fallback;
   1007 	ERR_STATE *ret,tmp,*tmpp=NULL;
   1008 	int i;
   1009 	CRYPTO_THREADID tid;
   1010 
   1011 	err_fns_check();
   1012 	CRYPTO_THREADID_current(&tid);
   1013 	CRYPTO_THREADID_cpy(&tmp.tid, &tid);
   1014 	ret=ERRFN(thread_get_item)(&tmp);
   1015 
   1016 	/* ret == the error state, if NULL, make a new one */
   1017 	if (ret == NULL)
   1018 		{
   1019 		ret=(ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
   1020 		if (ret == NULL) return(&fallback);
   1021 		CRYPTO_THREADID_cpy(&ret->tid, &tid);
   1022 		ret->top=0;
   1023 		ret->bottom=0;
   1024 		for (i=0; i<ERR_NUM_ERRORS; i++)
   1025 			{
   1026 			ret->err_data[i]=NULL;
   1027 			ret->err_data_flags[i]=0;
   1028 			}
   1029 		tmpp = ERRFN(thread_set_item)(ret);
   1030 		/* To check if insertion failed, do a get. */
   1031 		if (ERRFN(thread_get_item)(ret) != ret)
   1032 			{
   1033 			ERR_STATE_free(ret); /* could not insert it */
   1034 			return(&fallback);
   1035 			}
   1036 		/* If a race occured in this function and we came second, tmpp
   1037 		 * is the first one that we just replaced. */
   1038 		if (tmpp)
   1039 			ERR_STATE_free(tmpp);
   1040 		}
   1041 	return ret;
   1042 	}
   1043 
   1044 int ERR_get_next_error_library(void)
   1045 	{
   1046 	err_fns_check();
   1047 	return ERRFN(get_next_lib)();
   1048 	}
   1049 
   1050 void ERR_set_error_data(char *data, int flags)
   1051 	{
   1052 	ERR_STATE *es;
   1053 	int i;
   1054 
   1055 	es=ERR_get_state();
   1056 
   1057 	i=es->top;
   1058 	if (i == 0)
   1059 		i=ERR_NUM_ERRORS-1;
   1060 
   1061 	err_clear_data(es,i);
   1062 	es->err_data[i]=data;
   1063 	es->err_data_flags[i]=flags;
   1064 	}
   1065 
   1066 void ERR_add_error_data(int num, ...)
   1067 	{
   1068 	va_list args;
   1069 	int i,n,s;
   1070 	char *str,*p,*a;
   1071 
   1072 	s=80;
   1073 	str=OPENSSL_malloc(s+1);
   1074 	if (str == NULL) return;
   1075 	str[0]='\0';
   1076 
   1077 	va_start(args, num);
   1078 	n=0;
   1079 	for (i=0; i<num; i++)
   1080 		{
   1081 		a=va_arg(args, char*);
   1082 		/* ignore NULLs, thanks to Bob Beck <beck (at) obtuse.com> */
   1083 		if (a != NULL)
   1084 			{
   1085 			n+=strlen(a);
   1086 			if (n > s)
   1087 				{
   1088 				s=n+20;
   1089 				p=OPENSSL_realloc(str,s+1);
   1090 				if (p == NULL)
   1091 					{
   1092 					OPENSSL_free(str);
   1093 					goto err;
   1094 					}
   1095 				else
   1096 					str=p;
   1097 				}
   1098 			BUF_strlcat(str,a,(size_t)s+1);
   1099 			}
   1100 		}
   1101 	ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);
   1102 
   1103 err:
   1104 	va_end(args);
   1105 	}
   1106 
   1107 int ERR_set_mark(void)
   1108 	{
   1109 	ERR_STATE *es;
   1110 
   1111 	es=ERR_get_state();
   1112 
   1113 	if (es->bottom == es->top) return 0;
   1114 	es->err_flags[es->top]|=ERR_FLAG_MARK;
   1115 	return 1;
   1116 	}
   1117 
   1118 int ERR_pop_to_mark(void)
   1119 	{
   1120 	ERR_STATE *es;
   1121 
   1122 	es=ERR_get_state();
   1123 
   1124 	while(es->bottom != es->top
   1125 		&& (es->err_flags[es->top] & ERR_FLAG_MARK) == 0)
   1126 		{
   1127 		err_clear(es,es->top);
   1128 		es->top-=1;
   1129 		if (es->top == -1) es->top=ERR_NUM_ERRORS-1;
   1130 		}
   1131 
   1132 	if (es->bottom == es->top) return 0;
   1133 	es->err_flags[es->top]&=~ERR_FLAG_MARK;
   1134 	return 1;
   1135 	}
   1136