diff options
Diffstat (limited to 'openssl/trunk/crypto/bn/bn_nist.c')
| -rw-r--r-- | openssl/trunk/crypto/bn/bn_nist.c | 775 |
1 files changed, 0 insertions, 775 deletions
diff --git a/openssl/trunk/crypto/bn/bn_nist.c b/openssl/trunk/crypto/bn/bn_nist.c deleted file mode 100644 index f8e306bb..00000000 --- a/openssl/trunk/crypto/bn/bn_nist.c +++ /dev/null @@ -1,775 +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 - -#if BN_BITS2 == 64 -static const BN_ULONG _nist_p_192[] = - {0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFEULL, - 0xFFFFFFFFFFFFFFFFULL}; -static const BN_ULONG _nist_p_224[] = - {0x0000000000000001ULL,0xFFFFFFFF00000000ULL, - 0xFFFFFFFFFFFFFFFFULL,0x00000000FFFFFFFFULL}; -static const BN_ULONG _nist_p_256[] = - {0xFFFFFFFFFFFFFFFFULL,0x00000000FFFFFFFFULL, - 0x0000000000000000ULL,0xFFFFFFFF00000001ULL}; -static const BN_ULONG _nist_p_384[] = - {0x00000000FFFFFFFFULL,0xFFFFFFFF00000000ULL, - 0xFFFFFFFFFFFFFFFEULL,0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL}; -static const BN_ULONG _nist_p_521[] = - {0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL, - 0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL, - 0x00000000000001FFULL}; -#elif BN_BITS2 == 32 -static const BN_ULONG _nist_p_192[] = {0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFE, - 0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF}; -static const BN_ULONG _nist_p_224[] = {0x00000001,0x00000000,0x00000000, - 0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF}; -static const BN_ULONG _nist_p_256[] = {0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF, - 0x00000000,0x00000000,0x00000000,0x00000001,0xFFFFFFFF}; -static const BN_ULONG _nist_p_384[] = {0xFFFFFFFF,0x00000000,0x00000000, - 0xFFFFFFFF,0xFFFFFFFE,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}; -#elif BN_BITS2 == 16 -static const BN_ULONG _nist_p_192[] = {0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFE, - 0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF}; -static const BN_ULONG _nist_p_224[] = {0x0001,0x0000,0x0000,0x0000,0x0000, - 0x0000,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF}; -static const BN_ULONG _nist_p_256[] = {0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF, - 0xFFFF,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0001,0x0000,0xFFFF, - 0xFFFF}; -static const BN_ULONG _nist_p_384[] = {0xFFFF,0xFFFF,0x0000,0x0000,0x0000, - 0x0000,0xFFFF,0xFFFF,0xFFFE,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF, - 0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF}; -static const BN_ULONG _nist_p_521[] = {0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF, - 0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF, - 0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF, - 0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0x01FF}; -#elif BN_BITS2 == 8 -static const BN_ULONG _nist_p_192[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF}; -static const BN_ULONG _nist_p_224[] = {0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00, - 0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; -static const BN_ULONG _nist_p_256[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, - 0x00,0x00,0x01,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF}; -static const BN_ULONG _nist_p_384[] = {0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00, - 0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; -static const BN_ULONG _nist_p_521[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, - 0xFF,0x01}; -#endif - -const BIGNUM *BN_get0_nist_prime_192(void) - { - static BIGNUM const_nist_192 = { (BN_ULONG *)_nist_p_192, - BN_NIST_192_TOP, BN_NIST_192_TOP, 0, BN_FLG_STATIC_DATA }; - return &const_nist_192; - } - -const BIGNUM *BN_get0_nist_prime_224(void) - { - static BIGNUM const_nist_224 = { (BN_ULONG *)_nist_p_224, - BN_NIST_224_TOP, BN_NIST_224_TOP, 0, BN_FLG_STATIC_DATA }; - return &const_nist_224; - } - -const BIGNUM *BN_get0_nist_prime_256(void) - { - static BIGNUM const_nist_256 = { (BN_ULONG *)_nist_p_256, - BN_NIST_256_TOP, BN_NIST_256_TOP, 0, BN_FLG_STATIC_DATA }; - return &const_nist_256; - } - -const BIGNUM *BN_get0_nist_prime_384(void) - { - static BIGNUM const_nist_384 = { (BN_ULONG *)_nist_p_384, - BN_NIST_384_TOP, BN_NIST_384_TOP, 0, BN_FLG_STATIC_DATA }; - return &const_nist_384; - } - -const BIGNUM *BN_get0_nist_prime_521(void) - { - static BIGNUM const_nist_521 = { (BN_ULONG *)_nist_p_521, - BN_NIST_521_TOP, BN_NIST_521_TOP, 0, BN_FLG_STATIC_DATA }; - return &const_nist_521; - } - -/* some misc internal functions */ -#if BN_BITS2 != 64 -static BN_ULONG _256_data[BN_NIST_256_TOP*6]; -static int _is_set_256_data = 0; -static void _init_256_data(void); - -static BN_ULONG _384_data[BN_NIST_384_TOP*8]; -static int _is_set_384_data = 0; -static void _init_384_data(void); -#endif - -#define BN_NIST_ADD_ONE(a) while (!(++(*(a)))) ++(a); - -static void nist_cp_bn_0(BN_ULONG *buf, BN_ULONG *a, int top, int max) - { - int i; - BN_ULONG *_tmp1 = (buf), *_tmp2 = (a); - for (i = (top); i != 0; i--) - *_tmp1++ = *_tmp2++; - for (i = (max) - (top); i != 0; i--) - *_tmp1++ = (BN_ULONG) 0; - } - -static void nist_cp_bn(BN_ULONG *buf, BN_ULONG *a, int top) - { - int i; - BN_ULONG *_tmp1 = (buf), *_tmp2 = (a); - for (i = (top); i != 0; i--) - *_tmp1++ = *_tmp2++; - } - -#if BN_BITS2 == 64 -#define bn_cp_64(to, n, from, m) (to)[n] = (from)[m]; -#define bn_64_set_0(to, n) (to)[n] = (BN_ULONG)0; -/* TBD */ -#define bn_cp_32(to, n, from, m) (to)[n] = (from)[m]; -#define bn_32_set_0(to, n) (to)[n] = (BN_ULONG)0; -#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); \ - } -#if BN_BITS2 == 32 -#define bn_cp_32(to, n, from, m) (to)[n] = (from)[m]; -#define bn_32_set_0(to, n) (to)[n] = (BN_ULONG)0; -#elif BN_BITS2 == 16 -#define bn_cp_32(to, n, from, m) \ - { \ - (to)[(n)*2] = (from)[(m)*2]; \ - (to)[(n)*2+1] = (from)[(m)*2+1];\ - } -#define bn_32_set_0(to, n) { (to)[(n)*2] = 0; (to)[(n)*2+1] = 0; } -#elif BN_BITS2 == 8 -#define bn_cp_32(to, n, from, m) \ - { \ - (to)[(n)*4] = (from)[(m)*4]; \ - (to)[(n)*4+1] = (from)[(m)*4+1];\ - (to)[(n)*4+2] = (from)[(m)*4+2];\ - (to)[(n)*4+3] = (from)[(m)*4+3];\ - } -#define bn_32_set_0(to, n) \ - { (to)[(n)*4] = (BN_ULONG)0; (to)[(n)*4+1] = (BN_ULONG)0; \ - (to)[(n)*4+2] = (BN_ULONG)0; (to)[(n)*4+3] = (BN_ULONG)0; } -#endif -#endif /* BN_BITS2 != 64 */ - - -#define nist_set_192(to, from, a1, a2, a3) \ - { \ - if (a3 != 0) bn_cp_64(to, 0, from, (a3) - 3) else bn_64_set_0(to, 0)\ - bn_cp_64(to, 1, from, (a2) - 3) \ - if (a1 != 0) bn_cp_64(to, 2, from, (a1) - 3) else bn_64_set_0(to, 2)\ - } - -int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) - { - int top = a->top, i; - BN_ULONG carry = 0; - register BN_ULONG *r_d, *a_d = a->d; - BN_ULONG t_d[BN_NIST_192_TOP], - buf[BN_NIST_192_TOP]; - - 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 (top == BN_NIST_192_TOP) - return BN_usub(r, a, field); - - 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, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP, BN_NIST_192_TOP); - -#if defined(OPENSSL_SYS_VMS) && defined(__DECC) -# pragma message save -# pragma message disable BADSUBSCRIPT -#endif - - nist_set_192(t_d, buf, 0, 3, 3); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP)) - ++carry; - - nist_set_192(t_d, buf, 4, 4, 0); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP)) - ++carry; - -#if defined(OPENSSL_SYS_VMS) && defined(__DECC) -# pragma message restore -#endif - - nist_set_192(t_d, buf, 5, 5, 5) - if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP)) - ++carry; - - while (carry) - { - if (bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP)) - --carry; - } - r->top = BN_NIST_192_TOP; - bn_correct_top(r); - if (BN_ucmp(r, field) >= 0) - { - bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP); - bn_correct_top(r); - } - - bn_check_top(r); - return 1; - } - -#define nist_set_224(to, from, a1, a2, a3, a4, a5, a6, a7) \ - { \ - if (a7 != 0) bn_cp_32(to, 0, from, (a7) - 7) else bn_32_set_0(to, 0)\ - if (a6 != 0) bn_cp_32(to, 1, from, (a6) - 7) else bn_32_set_0(to, 1)\ - if (a5 != 0) bn_cp_32(to, 2, from, (a5) - 7) else bn_32_set_0(to, 2)\ - if (a4 != 0) bn_cp_32(to, 3, from, (a4) - 7) else bn_32_set_0(to, 3)\ - if (a3 != 0) bn_cp_32(to, 4, from, (a3) - 7) else bn_32_set_0(to, 4)\ - if (a2 != 0) bn_cp_32(to, 5, from, (a2) - 7) else bn_32_set_0(to, 5)\ - if (a1 != 0) bn_cp_32(to, 6, from, (a1) - 7) else bn_32_set_0(to, 6)\ - } - -int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) - { -#if BN_BITS2 != 64 - int top = a->top, i; - int carry = 0; - BN_ULONG *r_d, *a_d = a->d; - BN_ULONG t_d[BN_NIST_224_TOP], - buf[BN_NIST_224_TOP]; - - 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 (top == BN_NIST_224_TOP) - return BN_usub(r, a, field); - - 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; - - nist_cp_bn_0(buf, a_d + BN_NIST_224_TOP, top - BN_NIST_224_TOP, BN_NIST_224_TOP); - - nist_set_224(t_d, buf, 10, 9, 8, 7, 0, 0, 0); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP)) - ++carry; - nist_set_224(t_d, buf, 0, 13, 12, 11, 0, 0, 0); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP)) - ++carry; - nist_set_224(t_d, buf, 13, 12, 11, 10, 9, 8, 7); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP)) - --carry; - nist_set_224(t_d, buf, 0, 0, 0, 0, 13, 12, 11); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP)) - --carry; - - if (carry > 0) - while (carry) - { - if (bn_sub_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP)) - --carry; - } - else if (carry < 0) - while (carry) - { - if (bn_add_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP)) - ++carry; - } - - r->top = BN_NIST_224_TOP; - bn_correct_top(r); - if (BN_ucmp(r, field) >= 0) - { - bn_sub_words(r_d, r_d, _nist_p_224, BN_NIST_224_TOP); - bn_correct_top(r); - } - bn_check_top(r); - return 1; -#else - return 0; -#endif - } - -#if BN_BITS2 != 64 -static void _init_256_data(void) - { - int i; - BN_ULONG *tmp1 = _256_data; - const BN_ULONG *tmp2 = tmp1; - - memcpy(tmp1, _nist_p_256, BN_NIST_256_TOP * sizeof(BN_ULONG)); - tmp1 += BN_NIST_256_TOP; - - for (i=0; i<5; i++) - { - bn_add_words(tmp1, _nist_p_256, tmp2, BN_NIST_256_TOP); - tmp2 = tmp1; - tmp1 += BN_NIST_256_TOP; - } - _is_set_256_data = 1; - } -#endif - -#define nist_set_256(to, from, a1, a2, a3, a4, a5, a6, a7, a8) \ - { \ - if (a8 != 0) bn_cp_32(to, 0, from, (a8) - 8) else bn_32_set_0(to, 0)\ - if (a7 != 0) bn_cp_32(to, 1, from, (a7) - 8) else bn_32_set_0(to, 1)\ - if (a6 != 0) bn_cp_32(to, 2, from, (a6) - 8) else bn_32_set_0(to, 2)\ - if (a5 != 0) bn_cp_32(to, 3, from, (a5) - 8) else bn_32_set_0(to, 3)\ - if (a4 != 0) bn_cp_32(to, 4, from, (a4) - 8) else bn_32_set_0(to, 4)\ - if (a3 != 0) bn_cp_32(to, 5, from, (a3) - 8) else bn_32_set_0(to, 5)\ - if (a2 != 0) bn_cp_32(to, 6, from, (a2) - 8) else bn_32_set_0(to, 6)\ - if (a1 != 0) bn_cp_32(to, 7, from, (a1) - 8) else bn_32_set_0(to, 7)\ - } - -int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) - { -#if BN_BITS2 != 64 - int i, top = a->top; - int carry = 0; - register BN_ULONG *a_d = a->d, *r_d; - BN_ULONG t_d[BN_NIST_256_TOP], - t_d2[BN_NIST_256_TOP], - buf[BN_NIST_256_TOP]; - - if (!_is_set_256_data) - { - CRYPTO_w_lock(CRYPTO_LOCK_BN); - - if (!_is_set_256_data) - _init_256_data(); - - CRYPTO_w_unlock(CRYPTO_LOCK_BN); - } - - 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 (top == BN_NIST_256_TOP) - return BN_usub(r, a, field); - - 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, a_d + BN_NIST_256_TOP, top - BN_NIST_256_TOP, BN_NIST_256_TOP); - - /*S1*/ - nist_set_256(t_d, buf, 15, 14, 13, 12, 11, 0, 0, 0); - /*S2*/ - nist_set_256(t_d2,buf, 0, 15, 14, 13, 12, 0, 0, 0); - if (bn_add_words(t_d, t_d, t_d2, BN_NIST_256_TOP)) - carry = 2; - /* 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; - } - if (c) - ++carry; - } - - if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - ++carry; - /*S3*/ - nist_set_256(t_d, buf, 15, 14, 0, 0, 0, 10, 9, 8); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - ++carry; - /*S4*/ - nist_set_256(t_d, buf, 8, 13, 15, 14, 13, 11, 10, 9); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - ++carry; - /*D1*/ - nist_set_256(t_d, buf, 10, 8, 0, 0, 0, 13, 12, 11); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - --carry; - /*D2*/ - nist_set_256(t_d, buf, 11, 9, 0, 0, 15, 14, 13, 12); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - --carry; - /*D3*/ - nist_set_256(t_d, buf, 12, 0, 10, 9, 8, 15, 14, 13); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - --carry; - /*D4*/ - nist_set_256(t_d, buf, 13, 0, 11, 10, 9, 0, 15, 14); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP)) - --carry; - - if (carry) - { - if (carry > 0) - bn_sub_words(r_d, r_d, _256_data + BN_NIST_256_TOP * - --carry, BN_NIST_256_TOP); - else - { - carry = -carry; - bn_add_words(r_d, r_d, _256_data + BN_NIST_256_TOP * - --carry, BN_NIST_256_TOP); - } - } - - r->top = BN_NIST_256_TOP; - bn_correct_top(r); - if (BN_ucmp(r, field) >= 0) - { - bn_sub_words(r_d, r_d, _nist_p_256, BN_NIST_256_TOP); - bn_correct_top(r); - } - bn_check_top(r); - return 1; -#else - return 0; -#endif - } - -#if BN_BITS2 != 64 -static void _init_384_data(void) - { - int i; - BN_ULONG *tmp1 = _384_data; - const BN_ULONG *tmp2 = tmp1; - - memcpy(tmp1, _nist_p_384, BN_NIST_384_TOP * sizeof(BN_ULONG)); - tmp1 += BN_NIST_384_TOP; - - for (i=0; i<7; i++) - { - bn_add_words(tmp1, _nist_p_384, tmp2, BN_NIST_384_TOP); - tmp2 = tmp1; - tmp1 += BN_NIST_384_TOP; - } - _is_set_384_data = 1; - } -#endif - -#define nist_set_384(to,from,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) \ - { \ - if (a12 != 0) bn_cp_32(to, 0, from, (a12) - 12) else bn_32_set_0(to, 0)\ - if (a11 != 0) bn_cp_32(to, 1, from, (a11) - 12) else bn_32_set_0(to, 1)\ - if (a10 != 0) bn_cp_32(to, 2, from, (a10) - 12) else bn_32_set_0(to, 2)\ - if (a9 != 0) bn_cp_32(to, 3, from, (a9) - 12) else bn_32_set_0(to, 3)\ - if (a8 != 0) bn_cp_32(to, 4, from, (a8) - 12) else bn_32_set_0(to, 4)\ - if (a7 != 0) bn_cp_32(to, 5, from, (a7) - 12) else bn_32_set_0(to, 5)\ - if (a6 != 0) bn_cp_32(to, 6, from, (a6) - 12) else bn_32_set_0(to, 6)\ - if (a5 != 0) bn_cp_32(to, 7, from, (a5) - 12) else bn_32_set_0(to, 7)\ - if (a4 != 0) bn_cp_32(to, 8, from, (a4) - 12) else bn_32_set_0(to, 8)\ - if (a3 != 0) bn_cp_32(to, 9, from, (a3) - 12) else bn_32_set_0(to, 9)\ - if (a2 != 0) bn_cp_32(to, 10, from, (a2) - 12) else bn_32_set_0(to, 10)\ - if (a1 != 0) bn_cp_32(to, 11, from, (a1) - 12) else bn_32_set_0(to, 11)\ - } - -int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) - { -#if BN_BITS2 != 64 - int i, top = a->top; - int carry = 0; - register BN_ULONG *r_d, *a_d = a->d; - BN_ULONG t_d[BN_NIST_384_TOP], - buf[BN_NIST_384_TOP]; - - if (!_is_set_384_data) - { - CRYPTO_w_lock(CRYPTO_LOCK_BN); - - if (!_is_set_384_data) - _init_384_data(); - - CRYPTO_w_unlock(CRYPTO_LOCK_BN); - } - - 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 (top == BN_NIST_384_TOP) - return BN_usub(r, a, field); - - 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, a_d + BN_NIST_384_TOP, top - BN_NIST_384_TOP, BN_NIST_384_TOP); - - /*S1*/ - nist_set_256(t_d, buf, 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 = BN_NIST_256_TOP; i != 0; --i) - { - t= *ap; - *(ap++)=((t<<1)|c)&BN_MASK2; - c=(t & BN_TBIT)?1:0; - } - } - if (bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2), - t_d, BN_NIST_256_TOP)) - ++carry; - /*S2 */ - if (bn_add_words(r_d, r_d, buf, BN_NIST_384_TOP)) - ++carry; - /*S3*/ - nist_set_384(t_d,buf,20,19,18,17,16,15,14,13,12,23,22,21); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - ++carry; - /*S4*/ - nist_set_384(t_d,buf,19,18,17,16,15,14,13,12,20,0,23,0); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - ++carry; - /*S5*/ - nist_set_256(t_d, buf, 0, 0, 0, 0, 23-4, 22-4, 21-4, 20-4); - if (bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2), - t_d, BN_NIST_256_TOP)) - ++carry; - /*S6*/ - nist_set_384(t_d,buf,0,0,0,0,0,0,23,22,21,0,0,20); - if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - ++carry; - /*D1*/ - nist_set_384(t_d,buf,22,21,20,19,18,17,16,15,14,13,12,23); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - --carry; - /*D2*/ - nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,22,21,20,0); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - --carry; - /*D3*/ - nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,23,0,0,0); - if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP)) - --carry; - - if (carry) - { - if (carry > 0) - bn_sub_words(r_d, r_d, _384_data + BN_NIST_384_TOP * - --carry, BN_NIST_384_TOP); - else - { - carry = -carry; - bn_add_words(r_d, r_d, _384_data + BN_NIST_384_TOP * - --carry, BN_NIST_384_TOP); - } - } - - r->top = BN_NIST_384_TOP; - bn_correct_top(r); - if (BN_ucmp(r, field) >= 0) - { - bn_sub_words(r_d, r_d, _nist_p_384, BN_NIST_384_TOP); - bn_correct_top(r); - } - bn_check_top(r); - return 1; -#else - return 0; -#endif - } - -int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, - BN_CTX *ctx) - { -#if BN_BITS2 == 64 -#define BN_NIST_521_TOP_MASK (BN_ULONG)0x1FF -#elif BN_BITS2 == 32 -#define BN_NIST_521_TOP_MASK (BN_ULONG)0x1FF -#elif BN_BITS2 == 16 -#define BN_NIST_521_TOP_MASK (BN_ULONG)0x1FF -#elif BN_BITS2 == 8 -#define BN_NIST_521_TOP_MASK (BN_ULONG)0x1 -#endif - int top, ret = 0; - BN_ULONG *r_d; - BIGNUM *tmp; - - /* check whether a reduction is necessary */ - top = a->top; - if (top < BN_NIST_521_TOP || ( top == BN_NIST_521_TOP && - (!(a->d[BN_NIST_521_TOP-1] & ~(BN_NIST_521_TOP_MASK))))) - return (r == a)? 1 : (BN_copy(r ,a) != NULL); - - BN_CTX_start(ctx); - tmp = BN_CTX_get(ctx); - if (!tmp) - goto err; - - if (!bn_wexpand(tmp, BN_NIST_521_TOP)) - goto err; - nist_cp_bn(tmp->d, a->d, BN_NIST_521_TOP); - - tmp->top = BN_NIST_521_TOP; - tmp->d[BN_NIST_521_TOP-1] &= BN_NIST_521_TOP_MASK; - bn_correct_top(tmp); - - if (!BN_rshift(r, a, 521)) - goto err; - - if (!BN_uadd(r, tmp, r)) - goto err; - top = r->top; - r_d = r->d; - if (top == BN_NIST_521_TOP && - (r_d[BN_NIST_521_TOP-1] & ~(BN_NIST_521_TOP_MASK))) - { - BN_NIST_ADD_ONE(r_d) - r_d[BN_NIST_521_TOP-1] &= BN_NIST_521_TOP_MASK; - } - bn_correct_top(r); - - ret = 1; -err: - BN_CTX_end(ctx); - - bn_check_top(r); - return ret; - } |