diff options
Diffstat (limited to 'thirdparty/openssl/crypto/bn/bn_nist.c')
| -rw-r--r-- | thirdparty/openssl/crypto/bn/bn_nist.c | 1262 |
1 files changed, 0 insertions, 1262 deletions
diff --git a/thirdparty/openssl/crypto/bn/bn_nist.c b/thirdparty/openssl/crypto/bn/bn_nist.c deleted file mode 100644 index 4a45404c6f..0000000000 --- a/thirdparty/openssl/crypto/bn/bn_nist.c +++ /dev/null @@ -1,1262 +0,0 @@ -/* crypto/bn/bn_nist.c */ -/* - * Written by Nils Larsch for the OpenSSL project - */ -/* ==================================================================== - * Copyright (c) 1998-2005 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). - * - */ - -#include "bn_lcl.h" -#include "cryptlib.h" - -#define BN_NIST_192_TOP (192+BN_BITS2-1)/BN_BITS2 -#define BN_NIST_224_TOP (224+BN_BITS2-1)/BN_BITS2 -#define BN_NIST_256_TOP (256+BN_BITS2-1)/BN_BITS2 -#define BN_NIST_384_TOP (384+BN_BITS2-1)/BN_BITS2 -#define BN_NIST_521_TOP (521+BN_BITS2-1)/BN_BITS2 - -/* pre-computed tables are "carry-less" values of modulus*(i+1) */ -#if BN_BITS2 == 64 -static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = { - {0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFFULL}, - {0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL}, - {0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFCULL, 0xFFFFFFFFFFFFFFFFULL} -}; - -static const BN_ULONG _nist_p_192_sqr[] = { - 0x0000000000000001ULL, 0x0000000000000002ULL, 0x0000000000000001ULL, - 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL -}; - -static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = { - {0x0000000000000001ULL, 0xFFFFFFFF00000000ULL, - 0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL}, - {0x0000000000000002ULL, 0xFFFFFFFE00000000ULL, - 0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFFULL} /* this one is - * "carry-full" */ -}; - -static const BN_ULONG _nist_p_224_sqr[] = { - 0x0000000000000001ULL, 0xFFFFFFFE00000000ULL, - 0xFFFFFFFFFFFFFFFFULL, 0x0000000200000000ULL, - 0x0000000000000000ULL, 0xFFFFFFFFFFFFFFFEULL, - 0xFFFFFFFFFFFFFFFFULL -}; - -static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = { - {0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL, - 0x0000000000000000ULL, 0xFFFFFFFF00000001ULL}, - {0xFFFFFFFFFFFFFFFEULL, 0x00000001FFFFFFFFULL, - 0x0000000000000000ULL, 0xFFFFFFFE00000002ULL}, - {0xFFFFFFFFFFFFFFFDULL, 0x00000002FFFFFFFFULL, - 0x0000000000000000ULL, 0xFFFFFFFD00000003ULL}, - {0xFFFFFFFFFFFFFFFCULL, 0x00000003FFFFFFFFULL, - 0x0000000000000000ULL, 0xFFFFFFFC00000004ULL}, - {0xFFFFFFFFFFFFFFFBULL, 0x00000004FFFFFFFFULL, - 0x0000000000000000ULL, 0xFFFFFFFB00000005ULL}, -}; - -static const BN_ULONG _nist_p_256_sqr[] = { - 0x0000000000000001ULL, 0xFFFFFFFE00000000ULL, - 0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFEULL, - 0x00000001FFFFFFFEULL, 0x00000001FFFFFFFEULL, - 0xFFFFFFFE00000001ULL, 0xFFFFFFFE00000002ULL -}; - -static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = { - {0x00000000FFFFFFFFULL, 0xFFFFFFFF00000000ULL, 0xFFFFFFFFFFFFFFFEULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL}, - {0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, 0xFFFFFFFFFFFFFFFDULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL}, - {0x00000002FFFFFFFDULL, 0xFFFFFFFD00000000ULL, 0xFFFFFFFFFFFFFFFCULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL}, - {0x00000003FFFFFFFCULL, 0xFFFFFFFC00000000ULL, 0xFFFFFFFFFFFFFFFBULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL}, - {0x00000004FFFFFFFBULL, 0xFFFFFFFB00000000ULL, 0xFFFFFFFFFFFFFFFAULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL}, -}; - -static const BN_ULONG _nist_p_384_sqr[] = { - 0xFFFFFFFE00000001ULL, 0x0000000200000000ULL, 0xFFFFFFFE00000000ULL, - 0x0000000200000000ULL, 0x0000000000000001ULL, 0x0000000000000000ULL, - 0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, 0xFFFFFFFFFFFFFFFDULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -}; - -static const BN_ULONG _nist_p_521[] = - { 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0x00000000000001FFULL -}; - -static const BN_ULONG _nist_p_521_sqr[] = { - 0x0000000000000001ULL, 0x0000000000000000ULL, 0x0000000000000000ULL, - 0x0000000000000000ULL, 0x0000000000000000ULL, 0x0000000000000000ULL, - 0x0000000000000000ULL, 0x0000000000000000ULL, 0xFFFFFFFFFFFFFC00ULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL, 0x000000000003FFFFULL -}; -#elif BN_BITS2 == 32 -static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = { - {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF} -}; - -static const BN_ULONG _nist_p_192_sqr[] = { - 0x00000001, 0x00000000, 0x00000002, 0x00000000, 0x00000001, 0x00000000, - 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -}; - -static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = { - {0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0x00000002, 0x00000000, 0x00000000, 0xFFFFFFFE, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF} -}; - -static const BN_ULONG _nist_p_224_sqr[] = { - 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE, - 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000002, - 0x00000000, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF -}; - -static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = { - {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, - 0x00000000, 0x00000000, 0x00000001, 0xFFFFFFFF}, - {0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001, - 0x00000000, 0x00000000, 0x00000002, 0xFFFFFFFE}, - {0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000002, - 0x00000000, 0x00000000, 0x00000003, 0xFFFFFFFD}, - {0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000003, - 0x00000000, 0x00000000, 0x00000004, 0xFFFFFFFC}, - {0xFFFFFFFB, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000004, - 0x00000000, 0x00000000, 0x00000005, 0xFFFFFFFB}, -}; - -static const BN_ULONG _nist_p_256_sqr[] = { - 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000001, - 0xFFFFFFFE, 0x00000001, 0xFFFFFFFE, 0x00000001, - 0x00000001, 0xFFFFFFFE, 0x00000002, 0xFFFFFFFE -}; - -static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = { - {0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFD, 0x00000002, 0x00000000, 0xFFFFFFFD, 0xFFFFFFFC, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFC, 0x00000003, 0x00000000, 0xFFFFFFFC, 0xFFFFFFFB, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, - {0xFFFFFFFB, 0x00000004, 0x00000000, 0xFFFFFFFB, 0xFFFFFFFA, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, -}; - -static const BN_ULONG _nist_p_384_sqr[] = { - 0x00000001, 0xFFFFFFFE, 0x00000000, 0x00000002, 0x00000000, 0xFFFFFFFE, - 0x00000000, 0x00000002, 0x00000001, 0x00000000, 0x00000000, 0x00000000, - 0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -}; - -static const BN_ULONG _nist_p_521[] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0x000001FF -}; - -static const BN_ULONG _nist_p_521_sqr[] = { - 0x00000001, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xFFFFFC00, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0x0003FFFF -}; -#else -# error "unsupported BN_BITS2" -#endif - -static const BIGNUM _bignum_nist_p_192 = { - (BN_ULONG *)_nist_p_192[0], - BN_NIST_192_TOP, - BN_NIST_192_TOP, - 0, - BN_FLG_STATIC_DATA -}; - -static const BIGNUM _bignum_nist_p_224 = { - (BN_ULONG *)_nist_p_224[0], - BN_NIST_224_TOP, - BN_NIST_224_TOP, - 0, - BN_FLG_STATIC_DATA -}; - -static const BIGNUM _bignum_nist_p_256 = { - (BN_ULONG *)_nist_p_256[0], - BN_NIST_256_TOP, - BN_NIST_256_TOP, - 0, - BN_FLG_STATIC_DATA -}; - -static const BIGNUM _bignum_nist_p_384 = { - (BN_ULONG *)_nist_p_384[0], - BN_NIST_384_TOP, - BN_NIST_384_TOP, - 0, - BN_FLG_STATIC_DATA -}; - -static const BIGNUM _bignum_nist_p_521 = { - (BN_ULONG *)_nist_p_521, - BN_NIST_521_TOP, - BN_NIST_521_TOP, - 0, - BN_FLG_STATIC_DATA -}; - -const BIGNUM *BN_get0_nist_prime_192(void) -{ - return &_bignum_nist_p_192; -} - -const BIGNUM *BN_get0_nist_prime_224(void) -{ - return &_bignum_nist_p_224; -} - -const BIGNUM *BN_get0_nist_prime_256(void) -{ - return &_bignum_nist_p_256; -} - -const BIGNUM *BN_get0_nist_prime_384(void) -{ - return &_bignum_nist_p_384; -} - -const BIGNUM *BN_get0_nist_prime_521(void) -{ - return &_bignum_nist_p_521; -} - -static void nist_cp_bn_0(BN_ULONG *dst, const BN_ULONG *src, int top, int max) -{ - int i; - -#ifdef BN_DEBUG - OPENSSL_assert(top <= max); -#endif - for (i = 0; i < top; i++) - dst[i] = src[i]; - for (; i < max; i++) - dst[i] = 0; -} - -static void nist_cp_bn(BN_ULONG *dst, const BN_ULONG *src, int top) -{ - int i; - - for (i = 0; i < top; i++) - dst[i] = src[i]; -} - -#if BN_BITS2 == 64 -# define bn_cp_64(to, n, from, m) (to)[n] = (m>=0)?((from)[m]):0; -# define bn_64_set_0(to, n) (to)[n] = (BN_ULONG)0; -/* - * two following macros are implemented under assumption that they - * are called in a sequence with *ascending* n, i.e. as they are... - */ -# define bn_cp_32_naked(to, n, from, m) (((n)&1)?(to[(n)/2]|=((m)&1)?(from[(m)/2]&BN_MASK2h):(from[(m)/2]<<32))\ - :(to[(n)/2] =((m)&1)?(from[(m)/2]>>32):(from[(m)/2]&BN_MASK2l))) -# define bn_32_set_0(to, n) (((n)&1)?(to[(n)/2]&=BN_MASK2l):(to[(n)/2]=0)); -# define bn_cp_32(to,n,from,m) ((m)>=0)?bn_cp_32_naked(to,n,from,m):bn_32_set_0(to,n) -# if defined(L_ENDIAN) -# if defined(__arch64__) -# define NIST_INT64 long -# else -# define NIST_INT64 long long -# endif -# endif -#else -# define bn_cp_64(to, n, from, m) \ - { \ - bn_cp_32(to, (n)*2, from, (m)*2); \ - bn_cp_32(to, (n)*2+1, from, (m)*2+1); \ - } -# define bn_64_set_0(to, n) \ - { \ - bn_32_set_0(to, (n)*2); \ - bn_32_set_0(to, (n)*2+1); \ - } -# define bn_cp_32(to, n, from, m) (to)[n] = (m>=0)?((from)[m]):0; -# define bn_32_set_0(to, n) (to)[n] = (BN_ULONG)0; -# if defined(_WIN32) && !defined(__GNUC__) -# define NIST_INT64 __int64 -# elif defined(BN_LLONG) -# define NIST_INT64 long long -# endif -#endif /* BN_BITS2 != 64 */ - -#define nist_set_192(to, from, a1, a2, a3) \ - { \ - bn_cp_64(to, 0, from, (a3) - 3) \ - bn_cp_64(to, 1, from, (a2) - 3) \ - bn_cp_64(to, 2, from, (a1) - 3) \ - } - -int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) -{ - int top = a->top, i; - int carry; - register BN_ULONG *r_d, *a_d = a->d; - union { - BN_ULONG bn[BN_NIST_192_TOP]; - unsigned int ui[BN_NIST_192_TOP * sizeof(BN_ULONG) / - sizeof(unsigned int)]; - } buf; - BN_ULONG c_d[BN_NIST_192_TOP], *res; - PTR_SIZE_INT mask; - static const BIGNUM _bignum_nist_p_192_sqr = { - (BN_ULONG *)_nist_p_192_sqr, - sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]), - sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]), - 0, BN_FLG_STATIC_DATA - }; - - field = &_bignum_nist_p_192; /* just to make sure */ - - if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_192_sqr) >= 0) - return BN_nnmod(r, a, field, ctx); - - i = BN_ucmp(field, a); - if (i == 0) { - BN_zero(r); - return 1; - } else if (i > 0) - return (r == a) ? 1 : (BN_copy(r, a) != NULL); - - if (r != a) { - if (!bn_wexpand(r, BN_NIST_192_TOP)) - return 0; - r_d = r->d; - nist_cp_bn(r_d, a_d, BN_NIST_192_TOP); - } else - r_d = a_d; - - nist_cp_bn_0(buf.bn, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP, - BN_NIST_192_TOP); - -#if defined(NIST_INT64) - { - NIST_INT64 acc; /* accumulator */ - unsigned int *rp = (unsigned int *)r_d; - const unsigned int *bp = (const unsigned int *)buf.ui; - - acc = rp[0]; - acc += bp[3 * 2 - 6]; - acc += bp[5 * 2 - 6]; - rp[0] = (unsigned int)acc; - acc >>= 32; - - acc += rp[1]; - acc += bp[3 * 2 - 5]; - acc += bp[5 * 2 - 5]; - rp[1] = (unsigned int)acc; - acc >>= 32; - - acc += rp[2]; - acc += bp[3 * 2 - 6]; - acc += bp[4 * 2 - 6]; - acc += bp[5 * 2 - 6]; - rp[2] = (unsigned int)acc; - acc >>= 32; - - acc += rp[3]; - acc += bp[3 * 2 - 5]; - acc += bp[4 * 2 - 5]; - acc += bp[5 * 2 - 5]; - rp[3] = (unsigned int)acc; - acc >>= 32; - - acc += rp[4]; - acc += bp[4 * 2 - 6]; - acc += bp[5 * 2 - 6]; - rp[4] = (unsigned int)acc; - acc >>= 32; - - acc += rp[5]; - acc += bp[4 * 2 - 5]; - acc += bp[5 * 2 - 5]; - rp[5] = (unsigned int)acc; - - carry = (int)(acc >> 32); - } -#else - { - BN_ULONG t_d[BN_NIST_192_TOP]; - - nist_set_192(t_d, buf.bn, 0, 3, 3); - carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); - nist_set_192(t_d, buf.bn, 4, 4, 0); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); - nist_set_192(t_d, buf.bn, 5, 5, 5) - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); - } -#endif - if (carry > 0) - carry = - (int)bn_sub_words(r_d, r_d, _nist_p_192[carry - 1], - BN_NIST_192_TOP); - else - carry = 1; - - /* - * we need 'if (carry==0 || result>=modulus) result-=modulus;' - * as comparison implies subtraction, we can write - * 'tmp=result-modulus; if (!carry || !borrow) result=tmp;' - * this is what happens below, but without explicit if:-) a. - */ - mask = - 0 - (PTR_SIZE_INT) bn_sub_words(c_d, r_d, _nist_p_192[0], - BN_NIST_192_TOP); - mask &= 0 - (PTR_SIZE_INT) carry; - res = c_d; - res = (BN_ULONG *) - (((PTR_SIZE_INT) res & ~mask) | ((PTR_SIZE_INT) r_d & mask)); - nist_cp_bn(r_d, res, BN_NIST_192_TOP); - r->top = BN_NIST_192_TOP; - bn_correct_top(r); - - return 1; -} - -typedef BN_ULONG (*bn_addsub_f) (BN_ULONG *, const BN_ULONG *, - const BN_ULONG *, int); - -#define nist_set_224(to, from, a1, a2, a3, a4, a5, a6, a7) \ - { \ - bn_cp_32(to, 0, from, (a7) - 7) \ - bn_cp_32(to, 1, from, (a6) - 7) \ - bn_cp_32(to, 2, from, (a5) - 7) \ - bn_cp_32(to, 3, from, (a4) - 7) \ - bn_cp_32(to, 4, from, (a3) - 7) \ - bn_cp_32(to, 5, from, (a2) - 7) \ - bn_cp_32(to, 6, from, (a1) - 7) \ - } - -int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) -{ - int top = a->top, i; - int carry; - BN_ULONG *r_d, *a_d = a->d; - union { - BN_ULONG bn[BN_NIST_224_TOP]; - unsigned int ui[BN_NIST_224_TOP * sizeof(BN_ULONG) / - sizeof(unsigned int)]; - } buf; - BN_ULONG c_d[BN_NIST_224_TOP], *res; - PTR_SIZE_INT mask; - union { - bn_addsub_f f; - PTR_SIZE_INT p; - } u; - static const BIGNUM _bignum_nist_p_224_sqr = { - (BN_ULONG *)_nist_p_224_sqr, - sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]), - sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]), - 0, BN_FLG_STATIC_DATA - }; - - field = &_bignum_nist_p_224; /* just to make sure */ - - if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_224_sqr) >= 0) - return BN_nnmod(r, a, field, ctx); - - i = BN_ucmp(field, a); - if (i == 0) { - BN_zero(r); - return 1; - } else if (i > 0) - return (r == a) ? 1 : (BN_copy(r, a) != NULL); - - if (r != a) { - if (!bn_wexpand(r, BN_NIST_224_TOP)) - return 0; - r_d = r->d; - nist_cp_bn(r_d, a_d, BN_NIST_224_TOP); - } else - r_d = a_d; - -#if BN_BITS2==64 - /* copy upper 256 bits of 448 bit number ... */ - nist_cp_bn_0(c_d, a_d + (BN_NIST_224_TOP - 1), - top - (BN_NIST_224_TOP - 1), BN_NIST_224_TOP); - /* ... and right shift by 32 to obtain upper 224 bits */ - nist_set_224(buf.bn, c_d, 14, 13, 12, 11, 10, 9, 8); - /* truncate lower part to 224 bits too */ - r_d[BN_NIST_224_TOP - 1] &= BN_MASK2l; -#else - nist_cp_bn_0(buf.bn, a_d + BN_NIST_224_TOP, top - BN_NIST_224_TOP, - BN_NIST_224_TOP); -#endif - -#if defined(NIST_INT64) && BN_BITS2!=64 - { - NIST_INT64 acc; /* accumulator */ - unsigned int *rp = (unsigned int *)r_d; - const unsigned int *bp = (const unsigned int *)buf.ui; - - acc = rp[0]; - acc -= bp[7 - 7]; - acc -= bp[11 - 7]; - rp[0] = (unsigned int)acc; - acc >>= 32; - - acc += rp[1]; - acc -= bp[8 - 7]; - acc -= bp[12 - 7]; - rp[1] = (unsigned int)acc; - acc >>= 32; - - acc += rp[2]; - acc -= bp[9 - 7]; - acc -= bp[13 - 7]; - rp[2] = (unsigned int)acc; - acc >>= 32; - - acc += rp[3]; - acc += bp[7 - 7]; - acc += bp[11 - 7]; - acc -= bp[10 - 7]; - rp[3] = (unsigned int)acc; - acc >>= 32; - - acc += rp[4]; - acc += bp[8 - 7]; - acc += bp[12 - 7]; - acc -= bp[11 - 7]; - rp[4] = (unsigned int)acc; - acc >>= 32; - - acc += rp[5]; - acc += bp[9 - 7]; - acc += bp[13 - 7]; - acc -= bp[12 - 7]; - rp[5] = (unsigned int)acc; - acc >>= 32; - - acc += rp[6]; - acc += bp[10 - 7]; - acc -= bp[13 - 7]; - rp[6] = (unsigned int)acc; - - carry = (int)(acc >> 32); -# if BN_BITS2==64 - rp[7] = carry; -# endif - } -#else - { - BN_ULONG t_d[BN_NIST_224_TOP]; - - nist_set_224(t_d, buf.bn, 10, 9, 8, 7, 0, 0, 0); - carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP); - nist_set_224(t_d, buf.bn, 0, 13, 12, 11, 0, 0, 0); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP); - nist_set_224(t_d, buf.bn, 13, 12, 11, 10, 9, 8, 7); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP); - nist_set_224(t_d, buf.bn, 0, 0, 0, 0, 13, 12, 11); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP); - -# if BN_BITS2==64 - carry = (int)(r_d[BN_NIST_224_TOP - 1] >> 32); -# endif - } -#endif - u.f = bn_sub_words; - if (carry > 0) { - carry = - (int)bn_sub_words(r_d, r_d, _nist_p_224[carry - 1], - BN_NIST_224_TOP); -#if BN_BITS2==64 - carry = (int)(~(r_d[BN_NIST_224_TOP - 1] >> 32)) & 1; -#endif - } else if (carry < 0) { - /* - * it's a bit more comlicated logic in this case. if bn_add_words - * yields no carry, then result has to be adjusted by unconditionally - * *adding* the modulus. but if it does, then result has to be - * compared to the modulus and conditionally adjusted by - * *subtracting* the latter. - */ - carry = - (int)bn_add_words(r_d, r_d, _nist_p_224[-carry - 1], - BN_NIST_224_TOP); - mask = 0 - (PTR_SIZE_INT) carry; - u.p = ((PTR_SIZE_INT) bn_sub_words & mask) | - ((PTR_SIZE_INT) bn_add_words & ~mask); - } else - carry = 1; - - /* otherwise it's effectively same as in BN_nist_mod_192... */ - mask = - 0 - (PTR_SIZE_INT) (*u.f) (c_d, r_d, _nist_p_224[0], BN_NIST_224_TOP); - mask &= 0 - (PTR_SIZE_INT) carry; - res = c_d; - res = (BN_ULONG *)(((PTR_SIZE_INT) res & ~mask) | - ((PTR_SIZE_INT) r_d & mask)); - nist_cp_bn(r_d, res, BN_NIST_224_TOP); - r->top = BN_NIST_224_TOP; - bn_correct_top(r); - - return 1; -} - -#define nist_set_256(to, from, a1, a2, a3, a4, a5, a6, a7, a8) \ - { \ - bn_cp_32(to, 0, from, (a8) - 8) \ - bn_cp_32(to, 1, from, (a7) - 8) \ - bn_cp_32(to, 2, from, (a6) - 8) \ - bn_cp_32(to, 3, from, (a5) - 8) \ - bn_cp_32(to, 4, from, (a4) - 8) \ - bn_cp_32(to, 5, from, (a3) - 8) \ - bn_cp_32(to, 6, from, (a2) - 8) \ - bn_cp_32(to, 7, from, (a1) - 8) \ - } - -int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) -{ - int i, top = a->top; - int carry = 0; - register BN_ULONG *a_d = a->d, *r_d; - union { - BN_ULONG bn[BN_NIST_256_TOP]; - unsigned int ui[BN_NIST_256_TOP * sizeof(BN_ULONG) / - sizeof(unsigned int)]; - } buf; - BN_ULONG c_d[BN_NIST_256_TOP], *res; - PTR_SIZE_INT mask; - union { - bn_addsub_f f; - PTR_SIZE_INT p; - } u; - static const BIGNUM _bignum_nist_p_256_sqr = { - (BN_ULONG *)_nist_p_256_sqr, - sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]), - sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]), - 0, BN_FLG_STATIC_DATA - }; - - field = &_bignum_nist_p_256; /* just to make sure */ - - if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_256_sqr) >= 0) - return BN_nnmod(r, a, field, ctx); - - i = BN_ucmp(field, a); - if (i == 0) { - BN_zero(r); - return 1; - } else if (i > 0) - return (r == a) ? 1 : (BN_copy(r, a) != NULL); - - if (r != a) { - if (!bn_wexpand(r, BN_NIST_256_TOP)) - return 0; - r_d = r->d; - nist_cp_bn(r_d, a_d, BN_NIST_256_TOP); - } else - r_d = a_d; - - nist_cp_bn_0(buf.bn, a_d + BN_NIST_256_TOP, top - BN_NIST_256_TOP, - BN_NIST_256_TOP); - -#if defined(NIST_INT64) - { - NIST_INT64 acc; /* accumulator */ - unsigned int *rp = (unsigned int *)r_d; - const unsigned int *bp = (const unsigned int *)buf.ui; - - acc = rp[0]; - acc += bp[8 - 8]; - acc += bp[9 - 8]; - acc -= bp[11 - 8]; - acc -= bp[12 - 8]; - acc -= bp[13 - 8]; - acc -= bp[14 - 8]; - rp[0] = (unsigned int)acc; - acc >>= 32; - - acc += rp[1]; - acc += bp[9 - 8]; - acc += bp[10 - 8]; - acc -= bp[12 - 8]; - acc -= bp[13 - 8]; - acc -= bp[14 - 8]; - acc -= bp[15 - 8]; - rp[1] = (unsigned int)acc; - acc >>= 32; - - acc += rp[2]; - acc += bp[10 - 8]; - acc += bp[11 - 8]; - acc -= bp[13 - 8]; - acc -= bp[14 - 8]; - acc -= bp[15 - 8]; - rp[2] = (unsigned int)acc; - acc >>= 32; - - acc += rp[3]; - acc += bp[11 - 8]; - acc += bp[11 - 8]; - acc += bp[12 - 8]; - acc += bp[12 - 8]; - acc += bp[13 - 8]; - acc -= bp[15 - 8]; - acc -= bp[8 - 8]; - acc -= bp[9 - 8]; - rp[3] = (unsigned int)acc; - acc >>= 32; - - acc += rp[4]; - acc += bp[12 - 8]; - acc += bp[12 - 8]; - acc += bp[13 - 8]; - acc += bp[13 - 8]; - acc += bp[14 - 8]; - acc -= bp[9 - 8]; - acc -= bp[10 - 8]; - rp[4] = (unsigned int)acc; - acc >>= 32; - - acc += rp[5]; - acc += bp[13 - 8]; - acc += bp[13 - 8]; - acc += bp[14 - 8]; - acc += bp[14 - 8]; - acc += bp[15 - 8]; - acc -= bp[10 - 8]; - acc -= bp[11 - 8]; - rp[5] = (unsigned int)acc; - acc >>= 32; - - acc += rp[6]; - acc += bp[14 - 8]; - acc += bp[14 - 8]; - acc += bp[15 - 8]; - acc += bp[15 - 8]; - acc += bp[14 - 8]; - acc += bp[13 - 8]; - acc -= bp[8 - 8]; - acc -= bp[9 - 8]; - rp[6] = (unsigned int)acc; - acc >>= 32; - - acc += rp[7]; - acc += bp[15 - 8]; - acc += bp[15 - 8]; - acc += bp[15 - 8]; - acc += bp[8 - 8]; - acc -= bp[10 - 8]; - acc -= bp[11 - 8]; - acc -= bp[12 - 8]; - acc -= bp[13 - 8]; - rp[7] = (unsigned int)acc; - - carry = (int)(acc >> 32); - } -#else - { - BN_ULONG t_d[BN_NIST_256_TOP]; - - /* - * S1 - */ - nist_set_256(t_d, buf.bn, 15, 14, 13, 12, 11, 0, 0, 0); - /* - * S2 - */ - nist_set_256(c_d, buf.bn, 0, 15, 14, 13, 12, 0, 0, 0); - carry = (int)bn_add_words(t_d, t_d, c_d, BN_NIST_256_TOP); - /* left shift */ - { - register BN_ULONG *ap, t, c; - ap = t_d; - c = 0; - for (i = BN_NIST_256_TOP; i != 0; --i) { - t = *ap; - *(ap++) = ((t << 1) | c) & BN_MASK2; - c = (t & BN_TBIT) ? 1 : 0; - } - carry <<= 1; - carry |= c; - } - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * S3 - */ - nist_set_256(t_d, buf.bn, 15, 14, 0, 0, 0, 10, 9, 8); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * S4 - */ - nist_set_256(t_d, buf.bn, 8, 13, 15, 14, 13, 11, 10, 9); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * D1 - */ - nist_set_256(t_d, buf.bn, 10, 8, 0, 0, 0, 13, 12, 11); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * D2 - */ - nist_set_256(t_d, buf.bn, 11, 9, 0, 0, 15, 14, 13, 12); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * D3 - */ - nist_set_256(t_d, buf.bn, 12, 0, 10, 9, 8, 15, 14, 13); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); - /* - * D4 - */ - nist_set_256(t_d, buf.bn, 13, 0, 11, 10, 9, 0, 15, 14); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); - - } -#endif - /* see BN_nist_mod_224 for explanation */ - u.f = bn_sub_words; - if (carry > 0) - carry = - (int)bn_sub_words(r_d, r_d, _nist_p_256[carry - 1], - BN_NIST_256_TOP); - else if (carry < 0) { - carry = - (int)bn_add_words(r_d, r_d, _nist_p_256[-carry - 1], - BN_NIST_256_TOP); - mask = 0 - (PTR_SIZE_INT) carry; - u.p = ((PTR_SIZE_INT) bn_sub_words & mask) | - ((PTR_SIZE_INT) bn_add_words & ~mask); - } else - carry = 1; - - mask = - 0 - (PTR_SIZE_INT) (*u.f) (c_d, r_d, _nist_p_256[0], BN_NIST_256_TOP); - mask &= 0 - (PTR_SIZE_INT) carry; - res = c_d; - res = (BN_ULONG *)(((PTR_SIZE_INT) res & ~mask) | - ((PTR_SIZE_INT) r_d & mask)); - nist_cp_bn(r_d, res, BN_NIST_256_TOP); - r->top = BN_NIST_256_TOP; - bn_correct_top(r); - - return 1; -} - -#define nist_set_384(to,from,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) \ - { \ - bn_cp_32(to, 0, from, (a12) - 12) \ - bn_cp_32(to, 1, from, (a11) - 12) \ - bn_cp_32(to, 2, from, (a10) - 12) \ - bn_cp_32(to, 3, from, (a9) - 12) \ - bn_cp_32(to, 4, from, (a8) - 12) \ - bn_cp_32(to, 5, from, (a7) - 12) \ - bn_cp_32(to, 6, from, (a6) - 12) \ - bn_cp_32(to, 7, from, (a5) - 12) \ - bn_cp_32(to, 8, from, (a4) - 12) \ - bn_cp_32(to, 9, from, (a3) - 12) \ - bn_cp_32(to, 10, from, (a2) - 12) \ - bn_cp_32(to, 11, from, (a1) - 12) \ - } - -int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) -{ - int i, top = a->top; - int carry = 0; - register BN_ULONG *r_d, *a_d = a->d; - union { - BN_ULONG bn[BN_NIST_384_TOP]; - unsigned int ui[BN_NIST_384_TOP * sizeof(BN_ULONG) / - sizeof(unsigned int)]; - } buf; - BN_ULONG c_d[BN_NIST_384_TOP], *res; - PTR_SIZE_INT mask; - union { - bn_addsub_f f; - PTR_SIZE_INT p; - } u; - static const BIGNUM _bignum_nist_p_384_sqr = { - (BN_ULONG *)_nist_p_384_sqr, - sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]), - sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]), - 0, BN_FLG_STATIC_DATA - }; - - field = &_bignum_nist_p_384; /* just to make sure */ - - if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_384_sqr) >= 0) - return BN_nnmod(r, a, field, ctx); - - i = BN_ucmp(field, a); - if (i == 0) { - BN_zero(r); - return 1; - } else if (i > 0) - return (r == a) ? 1 : (BN_copy(r, a) != NULL); - - if (r != a) { - if (!bn_wexpand(r, BN_NIST_384_TOP)) - return 0; - r_d = r->d; - nist_cp_bn(r_d, a_d, BN_NIST_384_TOP); - } else - r_d = a_d; - - nist_cp_bn_0(buf.bn, a_d + BN_NIST_384_TOP, top - BN_NIST_384_TOP, - BN_NIST_384_TOP); - -#if defined(NIST_INT64) - { - NIST_INT64 acc; /* accumulator */ - unsigned int *rp = (unsigned int *)r_d; - const unsigned int *bp = (const unsigned int *)buf.ui; - - acc = rp[0]; - acc += bp[12 - 12]; - acc += bp[21 - 12]; - acc += bp[20 - 12]; - acc -= bp[23 - 12]; - rp[0] = (unsigned int)acc; - acc >>= 32; - - acc += rp[1]; - acc += bp[13 - 12]; - acc += bp[22 - 12]; - acc += bp[23 - 12]; - acc -= bp[12 - 12]; - acc -= bp[20 - 12]; - rp[1] = (unsigned int)acc; - acc >>= 32; - - acc += rp[2]; - acc += bp[14 - 12]; - acc += bp[23 - 12]; - acc -= bp[13 - 12]; - acc -= bp[21 - 12]; - rp[2] = (unsigned int)acc; - acc >>= 32; - - acc += rp[3]; - acc += bp[15 - 12]; - acc += bp[12 - 12]; - acc += bp[20 - 12]; - acc += bp[21 - 12]; - acc -= bp[14 - 12]; - acc -= bp[22 - 12]; - acc -= bp[23 - 12]; - rp[3] = (unsigned int)acc; - acc >>= 32; - - acc += rp[4]; - acc += bp[21 - 12]; - acc += bp[21 - 12]; - acc += bp[16 - 12]; - acc += bp[13 - 12]; - acc += bp[12 - 12]; - acc += bp[20 - 12]; - acc += bp[22 - 12]; - acc -= bp[15 - 12]; - acc -= bp[23 - 12]; - acc -= bp[23 - 12]; - rp[4] = (unsigned int)acc; - acc >>= 32; - - acc += rp[5]; - acc += bp[22 - 12]; - acc += bp[22 - 12]; - acc += bp[17 - 12]; - acc += bp[14 - 12]; - acc += bp[13 - 12]; - acc += bp[21 - 12]; - acc += bp[23 - 12]; - acc -= bp[16 - 12]; - rp[5] = (unsigned int)acc; - acc >>= 32; - - acc += rp[6]; - acc += bp[23 - 12]; - acc += bp[23 - 12]; - acc += bp[18 - 12]; - acc += bp[15 - 12]; - acc += bp[14 - 12]; - acc += bp[22 - 12]; - acc -= bp[17 - 12]; - rp[6] = (unsigned int)acc; - acc >>= 32; - - acc += rp[7]; - acc += bp[19 - 12]; - acc += bp[16 - 12]; - acc += bp[15 - 12]; - acc += bp[23 - 12]; - acc -= bp[18 - 12]; - rp[7] = (unsigned int)acc; - acc >>= 32; - - acc += rp[8]; - acc += bp[20 - 12]; - acc += bp[17 - 12]; - acc += bp[16 - 12]; - acc -= bp[19 - 12]; - rp[8] = (unsigned int)acc; - acc >>= 32; - - acc += rp[9]; - acc += bp[21 - 12]; - acc += bp[18 - 12]; - acc += bp[17 - 12]; - acc -= bp[20 - 12]; - rp[9] = (unsigned int)acc; - acc >>= 32; - - acc += rp[10]; - acc += bp[22 - 12]; - acc += bp[19 - 12]; - acc += bp[18 - 12]; - acc -= bp[21 - 12]; - rp[10] = (unsigned int)acc; - acc >>= 32; - - acc += rp[11]; - acc += bp[23 - 12]; - acc += bp[20 - 12]; - acc += bp[19 - 12]; - acc -= bp[22 - 12]; - rp[11] = (unsigned int)acc; - - carry = (int)(acc >> 32); - } -#else - { - BN_ULONG t_d[BN_NIST_384_TOP]; - - /* - * S1 - */ - nist_set_256(t_d, buf.bn, 0, 0, 0, 0, 0, 23 - 4, 22 - 4, 21 - 4); - /* left shift */ - { - register BN_ULONG *ap, t, c; - ap = t_d; - c = 0; - for (i = 3; i != 0; --i) { - t = *ap; - *(ap++) = ((t << 1) | c) & BN_MASK2; - c = (t & BN_TBIT) ? 1 : 0; - } - *ap = c; - } - carry = - (int)bn_add_words(r_d + (128 / BN_BITS2), r_d + (128 / BN_BITS2), - t_d, BN_NIST_256_TOP); - /* - * S2 - */ - carry += (int)bn_add_words(r_d, r_d, buf.bn, BN_NIST_384_TOP); - /* - * S3 - */ - nist_set_384(t_d, buf.bn, 20, 19, 18, 17, 16, 15, 14, 13, 12, 23, 22, - 21); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * S4 - */ - nist_set_384(t_d, buf.bn, 19, 18, 17, 16, 15, 14, 13, 12, 20, 0, 23, - 0); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * S5 - */ - nist_set_384(t_d, buf.bn, 0, 0, 0, 0, 23, 22, 21, 20, 0, 0, 0, 0); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * S6 - */ - nist_set_384(t_d, buf.bn, 0, 0, 0, 0, 0, 0, 23, 22, 21, 0, 0, 20); - carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * D1 - */ - nist_set_384(t_d, buf.bn, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, - 23); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * D2 - */ - nist_set_384(t_d, buf.bn, 0, 0, 0, 0, 0, 0, 0, 23, 22, 21, 20, 0); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); - /* - * D3 - */ - nist_set_384(t_d, buf.bn, 0, 0, 0, 0, 0, 0, 0, 23, 23, 0, 0, 0); - carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); - - } -#endif - /* see BN_nist_mod_224 for explanation */ - u.f = bn_sub_words; - if (carry > 0) - carry = - (int)bn_sub_words(r_d, r_d, _nist_p_384[carry - 1], - BN_NIST_384_TOP); - else if (carry < 0) { - carry = - (int)bn_add_words(r_d, r_d, _nist_p_384[-carry - 1], - BN_NIST_384_TOP); - mask = 0 - (PTR_SIZE_INT) carry; - u.p = ((PTR_SIZE_INT) bn_sub_words & mask) | - ((PTR_SIZE_INT) bn_add_words & ~mask); - } else - carry = 1; - - mask = - 0 - (PTR_SIZE_INT) (*u.f) (c_d, r_d, _nist_p_384[0], BN_NIST_384_TOP); - mask &= 0 - (PTR_SIZE_INT) carry; - res = c_d; - res = (BN_ULONG *)(((PTR_SIZE_INT) res & ~mask) | - ((PTR_SIZE_INT) r_d & mask)); - nist_cp_bn(r_d, res, BN_NIST_384_TOP); - r->top = BN_NIST_384_TOP; - bn_correct_top(r); - - return 1; -} - -#define BN_NIST_521_RSHIFT (521%BN_BITS2) -#define BN_NIST_521_LSHIFT (BN_BITS2-BN_NIST_521_RSHIFT) -#define BN_NIST_521_TOP_MASK ((BN_ULONG)BN_MASK2>>BN_NIST_521_LSHIFT) - -int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) -{ - int top = a->top, i; - BN_ULONG *r_d, *a_d = a->d, t_d[BN_NIST_521_TOP], val, tmp, *res; - PTR_SIZE_INT mask; - static const BIGNUM _bignum_nist_p_521_sqr = { - (BN_ULONG *)_nist_p_521_sqr, - sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]), - sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]), - 0, BN_FLG_STATIC_DATA - }; - - field = &_bignum_nist_p_521; /* just to make sure */ - - if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_521_sqr) >= 0) - return BN_nnmod(r, a, field, ctx); - - i = BN_ucmp(field, a); - if (i == 0) { - BN_zero(r); - return 1; - } else if (i > 0) - return (r == a) ? 1 : (BN_copy(r, a) != NULL); - - if (r != a) { - if (!bn_wexpand(r, BN_NIST_521_TOP)) - return 0; - r_d = r->d; - nist_cp_bn(r_d, a_d, BN_NIST_521_TOP); - } else - r_d = a_d; - - /* upper 521 bits, copy ... */ - nist_cp_bn_0(t_d, a_d + (BN_NIST_521_TOP - 1), - top - (BN_NIST_521_TOP - 1), BN_NIST_521_TOP); - /* ... and right shift */ - for (val = t_d[0], i = 0; i < BN_NIST_521_TOP - 1; i++) { - t_d[i] = (val >> BN_NIST_521_RSHIFT | - (tmp = t_d[i + 1]) << BN_NIST_521_LSHIFT) & BN_MASK2; - val = tmp; - } - t_d[i] = val >> BN_NIST_521_RSHIFT; - /* lower 521 bits */ - r_d[i] &= BN_NIST_521_TOP_MASK; - - bn_add_words(r_d, r_d, t_d, BN_NIST_521_TOP); - mask = - 0 - (PTR_SIZE_INT) bn_sub_words(t_d, r_d, _nist_p_521, - BN_NIST_521_TOP); - res = t_d; - res = (BN_ULONG *)(((PTR_SIZE_INT) res & ~mask) | - ((PTR_SIZE_INT) r_d & mask)); - nist_cp_bn(r_d, res, BN_NIST_521_TOP); - r->top = BN_NIST_521_TOP; - bn_correct_top(r); - - return 1; -} |