/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * * Portions of the attached software ("Contribution") are developed by * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. * * The Contribution is licensed pursuant to the Eric Young open source * license provided above. * * The binary polynomial arithmetic software is originally written by * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems * Laboratories. */ #ifndef OPENSSL_HEADER_BN_H #define OPENSSL_HEADER_BN_H #include #if defined(__cplusplus) extern "C" { #endif /* BN provides support for working with arbitrary sized integers. For example, * although the largest integer supported by the compiler might be 64 bits, BN * will allow you to work with numbers until you run out of memory. */ /* BN_ULONG is the native word size when working with big integers. * * Note: on some platforms, inttypes.h does not define print format macros in * C++ unless |__STDC_FORMAT_MACROS| defined. As this is a public header, bn.h * does not define |__STDC_FORMAT_MACROS| itself. C++ source files which use the * FMT macros must define it externally. */ #if defined(OPENSSL_64_BIT) #define BN_ULONG uint64_t #define BN_BITS2 64 #elif defined(OPENSSL_32_BIT) #define BN_ULONG uint32_t #define BN_BITS2 32 #else #error "Must define either OPENSSL_32_BIT or OPENSSL_64_BIT" #endif /* Allocation and freeing. */ /* GFp_BN_init initialises a stack allocated |BIGNUM|. */ OPENSSL_EXPORT void GFp_BN_init(BIGNUM *bn); /* GFp_BN_free frees the data referenced by |bn| and, if |bn| was originally * allocated on the heap, frees |bn| also. */ OPENSSL_EXPORT void GFp_BN_free(BIGNUM *bn); /* GFp_BN_copy sets |dest| equal to |src| and returns one on success or zero on * failure. */ OPENSSL_EXPORT int GFp_BN_copy(BIGNUM *dest, const BIGNUM *src); /* Basic functions. */ /* GFp_BN_zero sets |bn| to zero. */ OPENSSL_EXPORT void GFp_BN_zero(BIGNUM *bn); /* Internal functions. * * These functions are useful for code that is doing low-level manipulations of * BIGNUM values. However, be sure that no other function in this file does * what you want before turning to these. */ /* bn_correct_top decrements |bn->top| until |bn->d[top-1]| is non-zero or * until |top| is zero. */ OPENSSL_EXPORT void GFp_bn_correct_top(BIGNUM *bn); /* bn_wexpand ensures that |bn| has at least |words| works of space without * altering its value. It returns one on success and zero on allocation * failure. */ OPENSSL_EXPORT int GFp_bn_wexpand(BIGNUM *bn, size_t words); /* Simple arithmetic */ /* GFp_BN_mul_no_alias sets |r| = |a| * |b|, where |r| must not be the same pointer * as |a| or |b|. Returns one on success and zero otherwise. */ OPENSSL_EXPORT int GFp_BN_mul_no_alias(BIGNUM *r, const BIGNUM *a, const BIGNUM *b); /* Comparison functions */ /* GFp_BN_is_odd returns one if |bn| is odd and zero otherwise. */ OPENSSL_EXPORT int GFp_BN_is_odd(const BIGNUM *bn); /* Bitwise operations. */ /* GFp_BN_is_bit_set returns the value of the |n|th, least-significant bit in * |a|, or zero if the bit doesn't exist. */ OPENSSL_EXPORT int GFp_BN_is_bit_set(const BIGNUM *a, int n); /* Modulo arithmetic. */ /* GFp_BN_mod_mul_mont set |r| equal to |a| * |b|, in the Montgomery domain. * Both |a| and |b| must already be in the Montgomery domain (by * |GFp_BN_to_mont|). In particular, |a| and |b| are assumed to be in the range * [0, n), where |n| is the Montgomery modulus. It returns one on success or * zero on error. */ OPENSSL_EXPORT int GFp_BN_mod_mul_mont( BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *n, const BN_ULONG n0[/*BN_MONT_CTX_N0_LIMBS*/]); /* GFp_BN_reduce_montgomery returns |a % n| in constant-ish time using * Montgomery reduction. |a| is assumed to be in the range [0, n**2), where |n| * is the Montgomery modulus. It returns one on success or zero on error. */ int GFp_BN_reduce_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *n, const BN_ULONG n0[/*BN_MONT_CTX_N0_LIMBS*/]); /* Exponentiation. */ OPENSSL_EXPORT int GFp_BN_mod_exp_mont_consttime( BIGNUM *rr, const BIGNUM *a_mont, const BIGNUM *p, size_t p_bits, const BIGNUM *one_mont, const BIGNUM *n, const BN_ULONG n0[/*BN_MONT_CTX_N0_LIMBS*/]); /* Private functions */ /* Keep in sync with `BIGNUM` in `ring::rsa::bigint`. */ struct bignum_st { BN_ULONG *d; /* Pointer to an array of 'BN_BITS2' bit chunks in little-endian order. */ int top; /* Index of last used element in |d|, plus one. */ int dmax; /* Size of |d|, in words. */ int flags; /* bitmask of BN_FLG_* values */ }; #define BN_FLG_MALLOCED 0x01 #define BN_FLG_STATIC_DATA 0x02 #if defined(__cplusplus) } /* extern C */ #endif #endif /* OPENSSL_HEADER_BN_H */