422 lines
15 KiB
C
422 lines
15 KiB
C
/* crypto/cryptlib.c */
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/* ====================================================================
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* Copyright (c) 1998-2003 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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#include <openssl/safestack.h>
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#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
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static double SSLeay_MSVC5_hack = 0.0; /* and for VC1.5 */
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#endif
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DECLARE_STACK_OF(CRYPTO_dynlock)
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IMPLEMENT_STACK_OF(CRYPTO_dynlock)
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/* real #defines in crypto.h, keep these upto date */
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static const char *const lock_names[CRYPTO_NUM_LOCKS] = {
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"<<ERROR>>",
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"err",
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"ex_data",
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"x509",
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"x509_info",
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"x509_pkey",
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"x509_crl",
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"x509_req",
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"dsa",
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"rsa",
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"evp_pkey",
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"x509_store",
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"ssl_ctx",
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"ssl_cert",
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"ssl_session",
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"ssl_sess_cert",
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"ssl",
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"ssl_method",
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"rand",
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"rand2",
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"debug_malloc",
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"BIO",
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"gethostbyname",
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"getservbyname",
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"readdir",
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"RSA_blinding",
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"dh",
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"debug_malloc2",
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"dso",
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"dynlock",
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"engine",
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"ui",
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"ecdsa",
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"ec",
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"ecdh",
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"bn",
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"ec_pre_comp",
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"store",
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"comp",
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#ifndef OPENSSL_FIPS
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# if CRYPTO_NUM_LOCKS != 39
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# error "Inconsistency between crypto.h and cryptlib.c"
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# endif
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#else
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"fips",
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"fips2",
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# if CRYPTO_NUM_LOCKS != 41
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# error "Inconsistency between crypto.h and cryptlib.c"
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# endif
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#endif
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};
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/*
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* This is for applications to allocate new type names in the non-dynamic
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* array of lock names. These are numbered with positive numbers.
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*/
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static STACK *app_locks = NULL;
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/*
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* For applications that want a more dynamic way of handling threads, the
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* following stack is used. These are externally numbered with negative
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* numbers.
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*/
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static STACK_OF(CRYPTO_dynlock) *dyn_locks = NULL;
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static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
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(const char *file, int line) = NULL;
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static void (MS_FAR *dynlock_lock_callback) (int mode,
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struct CRYPTO_dynlock_value *l,
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const char *file, int line) =
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NULL;
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static void (MS_FAR *dynlock_destroy_callback) (struct CRYPTO_dynlock_value
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*l, const char *file,
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int line) = NULL;
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int CRYPTO_get_new_lockid(char *name)
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{
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char *str;
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int i;
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#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
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/*
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* A hack to make Visual C++ 5.0 work correctly when linking as a DLL
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* using /MT. Without this, the application cannot use and floating point
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* printf's. It also seems to be needed for Visual C 1.5 (win16)
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*/
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SSLeay_MSVC5_hack = (double)name[0] * (double)name[1];
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#endif
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if ((app_locks == NULL) && ((app_locks = sk_new_null()) == NULL)) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
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return (0);
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}
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if ((str = BUF_strdup(name)) == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
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return (0);
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}
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i = sk_push(app_locks, str);
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if (!i)
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OPENSSL_free(str);
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else
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i += CRYPTO_NUM_LOCKS; /* gap of one :-) */
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return (i);
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}
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int CRYPTO_get_new_dynlockid(void)
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{
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int i = 0;
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CRYPTO_dynlock *pointer = NULL;
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if (dynlock_create_callback == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,
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CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
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return (0);
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}
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CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
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if ((dyn_locks == NULL)
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&& ((dyn_locks = sk_CRYPTO_dynlock_new_null()) == NULL)) {
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
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return (0);
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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pointer = (CRYPTO_dynlock *) OPENSSL_malloc(sizeof(CRYPTO_dynlock));
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if (pointer == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
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return (0);
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}
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pointer->references = 1;
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pointer->data = dynlock_create_callback(__FILE__, __LINE__);
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if (pointer->data == NULL) {
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OPENSSL_free(pointer);
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
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return (0);
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}
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CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
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/* First, try to find an existing empty slot */
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i = sk_CRYPTO_dynlock_find(dyn_locks, NULL);
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/* If there was none, push, thereby creating a new one */
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if (i == -1)
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/*
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* Since sk_push() returns the number of items on the stack, not the
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* location of the pushed item, we need to transform the returned
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* number into a position, by decreasing it.
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*/
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i = sk_CRYPTO_dynlock_push(dyn_locks, pointer) - 1;
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else
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/*
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* If we found a place with a NULL pointer, put our pointer in it.
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*/
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(void)sk_CRYPTO_dynlock_set(dyn_locks, i, pointer);
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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if (i == -1) {
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dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
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OPENSSL_free(pointer);
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} else
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i += 1; /* to avoid 0 */
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return -i;
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}
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void CRYPTO_destroy_dynlockid(int i)
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{
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CRYPTO_dynlock *pointer = NULL;
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if (i)
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i = -i - 1;
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if (dynlock_destroy_callback == NULL)
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return;
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CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
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if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks)) {
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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return;
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}
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pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
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if (pointer != NULL) {
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--pointer->references;
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#ifdef REF_CHECK
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if (pointer->references < 0) {
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fprintf(stderr,
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"CRYPTO_destroy_dynlockid, bad reference count\n");
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abort();
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} else
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#endif
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if (pointer->references <= 0) {
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(void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
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} else
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pointer = NULL;
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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if (pointer) {
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dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
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OPENSSL_free(pointer);
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}
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}
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struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
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{
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CRYPTO_dynlock *pointer = NULL;
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if (i)
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i = -i - 1;
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CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
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if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
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pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
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if (pointer)
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pointer->references++;
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CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
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if (pointer)
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return pointer->data;
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return NULL;
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}
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struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
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(const char *file, int line) {
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return (dynlock_create_callback);
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}
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void (*CRYPTO_get_dynlock_lock_callback(void)) (int mode,
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struct CRYPTO_dynlock_value
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*l, const char *file,
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int line) {
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return (dynlock_lock_callback);
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}
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void (*CRYPTO_get_dynlock_destroy_callback(void))
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(struct CRYPTO_dynlock_value *l, const char *file, int line) {
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return (dynlock_destroy_callback);
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}
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void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
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(const char *file, int line))
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{
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dynlock_create_callback = func;
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}
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static void do_dynlock(int mode, int type, const char *file, int line)
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{
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if (dynlock_lock_callback != NULL) {
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struct CRYPTO_dynlock_value *pointer = CRYPTO_get_dynlock_value(type);
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OPENSSL_assert(pointer != NULL);
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dynlock_lock_callback(mode, pointer, file, line);
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CRYPTO_destroy_dynlockid(type);
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}
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}
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void CRYPTO_set_dynlock_lock_callback(void (*func) (int mode,
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struct
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CRYPTO_dynlock_value *l,
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const char *file,
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int line))
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{
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/*
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* Set callback so CRYPTO_lock() can now handle dynamic locks. This is OK
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* because at this point and application shouldn't be using OpenSSL from
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* multiple threads because it is setting up the locking callbacks.
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*/
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static int done = 0;
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if (!done) {
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int_CRYPTO_set_do_dynlock_callback(do_dynlock);
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done = 1;
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}
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dynlock_lock_callback = func;
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}
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void CRYPTO_set_dynlock_destroy_callback(void (*func)
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(struct CRYPTO_dynlock_value *l,
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const char *file, int line))
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{
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dynlock_destroy_callback = func;
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}
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const char *CRYPTO_get_lock_name(int type)
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{
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if (type < 0)
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return ("dynamic");
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else if (type < CRYPTO_NUM_LOCKS)
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return (lock_names[type]);
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else if (type - CRYPTO_NUM_LOCKS > sk_num(app_locks))
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return ("ERROR");
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else
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return (sk_value(app_locks, type - CRYPTO_NUM_LOCKS));
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}
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