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198 lines
8.7 KiB
198 lines
8.7 KiB
/* Copyright (C) 1995-1997 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 (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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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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*
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* Portions of the attached software ("Contribution") are developed by
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* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
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*
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* The Contribution is licensed pursuant to the Eric Young open source
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* license provided above.
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*
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* The binary polynomial arithmetic software is originally written by
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* Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems
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* Laboratories. */
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#ifndef OPENSSL_HEADER_BN_INTERNAL_H
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#define OPENSSL_HEADER_BN_INTERNAL_H
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#include <GFp/base.h>
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#if defined(OPENSSL_X86_64) && defined(_MSC_VER) && !defined(__clang__)
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#pragma warning(push, 3)
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#include <intrin.h>
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#pragma warning(pop)
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#pragma intrinsic(_umul128)
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#endif
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#include "../../internal.h"
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typedef crypto_word BN_ULONG;
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#if defined(OPENSSL_64_BIT)
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#if defined(BORINGSSL_HAS_UINT128)
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// MSVC doesn't support two-word integers on 64-bit.
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#define BN_ULLONG uint128_t
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#endif
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#define BN_BITS2 64
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#define BN_MONT_CTX_N0_LIMBS 1
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#define BN_MONT_CTX_N0(hi, lo) TOBN(hi, lo), 0
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#define TOBN(hi, lo) ((BN_ULONG)(hi) << 32 | (lo))
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#elif defined(OPENSSL_32_BIT)
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#define BN_ULLONG uint64_t
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#define BN_BITS2 32
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// On some 32-bit platforms, Montgomery multiplication is done using 64-bit
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// arithmetic with SIMD instructions. On such platforms, |BN_MONT_CTX::n0|
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// needs to be two words long. Only certain 32-bit platforms actually make use
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// of n0[1] and shorter R value would suffice for the others. However,
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// currently only the assembly files know which is which.
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#define BN_MONT_CTX_N0_LIMBS 2
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#define BN_MONT_CTX_N0(hi, lo) TOBN(hi, lo)
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#define TOBN(hi, lo) (lo), (hi)
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#else
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#error "Must define either OPENSSL_32_BIT or OPENSSL_64_BIT"
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#endif
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// |num| must be at least 4, at least on x86.
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//
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// In other forks, |bn_mul_mont| returns an |int| indicating whether it
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// actually did the multiplication. All our implementations always do the
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// multiplication, and forcing callers to deal with the possibility of it
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// failing just leads to further problems.
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//
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// In other forks, |bn_mod_mul|'s `num` argument has type |int| but it is
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// implicitly treated as a |size_t|; when |int| is smaller than |size_t|
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// then the |movq 48(%rsp),%r9| done by x86_64-xlate.pl implicitly does the
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// conversion.
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OPENSSL_STATIC_ASSERT(sizeof(int) == sizeof(size_t) ||
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(sizeof(int) == 4 && sizeof(size_t) == 8),
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"int and size_t ABI mismatch");
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void GFp_bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, size_t num);
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static inline void bn_umult_lohi(BN_ULONG *low_out, BN_ULONG *high_out,
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BN_ULONG a, BN_ULONG b) {
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#if defined(OPENSSL_X86_64) && defined(_MSC_VER) && !defined(__clang__)
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*low_out = _umul128(a, b, high_out);
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#else
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BN_ULLONG result = (BN_ULLONG)a * b;
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*low_out = (BN_ULONG)result;
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*high_out = (BN_ULONG)(result >> BN_BITS2);
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#endif
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}
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#endif // OPENSSL_HEADER_BN_INTERNAL_H
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