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259 lines
9.7 KiB
C
259 lines
9.7 KiB
C
/* crypto/cryptlib.c */
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/* ====================================================================
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* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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* ECDH support in OpenSSL originally developed by
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* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
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*/
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#include "cryptlib.h"
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#ifndef OPENSSL_NO_DEPRECATED
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static unsigned long (MS_FAR *id_callback)(void)=0;
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#endif
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static void (MS_FAR *threadid_callback)(CRYPTO_THREADID *)=0;
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/* the memset() here and in set_pointer() seem overkill, but for the sake of
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* CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause two
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* "equal" THREADID structs to not be memcmp()-identical. */
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void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
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{
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memset(id, 0, sizeof(*id));
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id->val = val;
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}
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static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
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void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
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{
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unsigned char *dest = (void *)&id->val;
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unsigned int accum = 0;
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unsigned char dnum = sizeof(id->val);
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memset(id, 0, sizeof(*id));
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id->ptr = ptr;
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if (sizeof(id->val) >= sizeof(id->ptr))
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{
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/* 'ptr' can be embedded in 'val' without loss of uniqueness */
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id->val = (unsigned long)id->ptr;
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return;
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}
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/* hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
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* linear function over the bytes in 'ptr', the co-efficients of which
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* are a sequence of low-primes (hash_coeffs is an 8-element cycle) -
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* the starting prime for the sequence varies for each byte of 'val'
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* (unique polynomials unless pointers are >64-bit). For added spice,
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* the totals accumulate rather than restarting from zero, and the index
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* of the 'val' byte is added each time (position dependence). If I was
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* a black-belt, I'd scan big-endian pointers in reverse to give
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* low-order bits more play, but this isn't crypto and I'd prefer nobody
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* mistake it as such. Plus I'm lazy. */
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while (dnum--)
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{
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const unsigned char *src = (void *)&id->ptr;
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unsigned char snum = sizeof(id->ptr);
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while (snum--)
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accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
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accum += dnum;
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*(dest++) = accum & 255;
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}
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}
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int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *))
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{
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if (threadid_callback)
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return 0;
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threadid_callback = func;
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return 1;
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}
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void (*CRYPTO_THREADID_get_callback(void))(CRYPTO_THREADID *)
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{
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return threadid_callback;
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}
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void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
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{
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if (threadid_callback)
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{
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threadid_callback(id);
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return;
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}
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#ifndef OPENSSL_NO_DEPRECATED
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/* If the deprecated callback was set, fall back to that */
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if (id_callback)
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{
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CRYPTO_THREADID_set_numeric(id, id_callback());
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return;
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}
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#endif
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/* Else pick a backup */
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#ifdef OPENSSL_SYS_WIN16
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CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentTask());
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#elif defined(OPENSSL_SYS_WIN32)
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CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
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#elif defined(OPENSSL_SYS_BEOS)
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CRYPTO_THREADID_set_numeric(id, (unsigned long)find_thread(NULL));
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#else
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/* For everything else, default to using the address of 'errno' */
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CRYPTO_THREADID_set_pointer(id, (void*)&errno);
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#endif
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}
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int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
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{
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return memcmp(a, b, sizeof(*a));
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}
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void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
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{
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memcpy(dest, src, sizeof(*src));
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}
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unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
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{
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return id->val;
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}
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#ifndef OPENSSL_NO_DEPRECATED
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unsigned long (*CRYPTO_get_id_callback(void))(void)
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{
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return(id_callback);
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}
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void CRYPTO_set_id_callback(unsigned long (*func)(void))
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{
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id_callback=func;
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}
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unsigned long CRYPTO_thread_id(void)
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{
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unsigned long ret=0;
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if (id_callback == NULL)
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{
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#ifdef OPENSSL_SYS_WIN16
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ret=(unsigned long)GetCurrentTask();
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#elif defined(OPENSSL_SYS_WIN32)
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ret=(unsigned long)GetCurrentThreadId();
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#elif defined(GETPID_IS_MEANINGLESS)
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ret=1L;
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#elif defined(OPENSSL_SYS_BEOS)
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ret=(unsigned long)find_thread(NULL);
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#else
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ret=(unsigned long)getpid();
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#endif
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}
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else
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ret=id_callback();
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return(ret);
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}
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#endif
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