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Diffstat (limited to 'openssl/crypto/bn/bn_lcl.h')
| -rw-r--r-- | openssl/crypto/bn/bn_lcl.h | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/openssl/crypto/bn/bn_lcl.h b/openssl/crypto/bn/bn_lcl.h new file mode 100644 index 000000000..27ac4397a --- /dev/null +++ b/openssl/crypto/bn/bn_lcl.h @@ -0,0 +1,490 @@ +/* crypto/bn/bn_lcl.h */ +/* Copyright (C) 1995-1998 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) 1998-2000 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). + * + */ + +#ifndef HEADER_BN_LCL_H +#define HEADER_BN_LCL_H + +#include <openssl/bn.h> + +#ifdef __cplusplus +extern "C" { +#endif + + +/* + * BN_window_bits_for_exponent_size -- macro for sliding window mod_exp functions + * + * + * For window size 'w' (w >= 2) and a random 'b' bits exponent, + * the number of multiplications is a constant plus on average + * + * 2^(w-1) + (b-w)/(w+1); + * + * here 2^(w-1) is for precomputing the table (we actually need + * entries only for windows that have the lowest bit set), and + * (b-w)/(w+1) is an approximation for the expected number of + * w-bit windows, not counting the first one. + * + * Thus we should use + * + * w >= 6 if b > 671 + * w = 5 if 671 > b > 239 + * w = 4 if 239 > b > 79 + * w = 3 if 79 > b > 23 + * w <= 2 if 23 > b + * + * (with draws in between). Very small exponents are often selected + * with low Hamming weight, so we use w = 1 for b <= 23. + */ +#if 1 +#define BN_window_bits_for_exponent_size(b) \ + ((b) > 671 ? 6 : \ + (b) > 239 ? 5 : \ + (b) > 79 ? 4 : \ + (b) > 23 ? 3 : 1) +#else +/* Old SSLeay/OpenSSL table. + * Maximum window size was 5, so this table differs for b==1024; + * but it coincides for other interesting values (b==160, b==512). + */ +#define BN_window_bits_for_exponent_size(b) \ + ((b) > 255 ? 5 : \ + (b) > 127 ? 4 : \ + (b) > 17 ? 3 : 1) +#endif + + + +/* BN_mod_exp_mont_conttime is based on the assumption that the + * L1 data cache line width of the target processor is at least + * the following value. + */ +#define MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH ( 64 ) +#define MOD_EXP_CTIME_MIN_CACHE_LINE_MASK (MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH - 1) + +/* Window sizes optimized for fixed window size modular exponentiation + * algorithm (BN_mod_exp_mont_consttime). + * + * To achieve the security goals of BN_mode_exp_mont_consttime, the + * maximum size of the window must not exceed + * log_2(MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH). + * + * Window size thresholds are defined for cache line sizes of 32 and 64, + * cache line sizes where log_2(32)=5 and log_2(64)=6 respectively. A + * window size of 7 should only be used on processors that have a 128 + * byte or greater cache line size. + */ +#if MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH == 64 + +# define BN_window_bits_for_ctime_exponent_size(b) \ + ((b) > 937 ? 6 : \ + (b) > 306 ? 5 : \ + (b) > 89 ? 4 : \ + (b) > 22 ? 3 : 1) +# define BN_MAX_WINDOW_BITS_FOR_CTIME_EXPONENT_SIZE (6) + +#elif MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH == 32 + +# define BN_window_bits_for_ctime_exponent_size(b) \ + ((b) > 306 ? 5 : \ + (b) > 89 ? 4 : \ + (b) > 22 ? 3 : 1) +# define BN_MAX_WINDOW_BITS_FOR_CTIME_EXPONENT_SIZE (5) + +#endif + + +/* Pentium pro 16,16,16,32,64 */ +/* Alpha 16,16,16,16.64 */ +#define BN_MULL_SIZE_NORMAL (16) /* 32 */ +#define BN_MUL_RECURSIVE_SIZE_NORMAL (16) /* 32 less than */ +#define BN_SQR_RECURSIVE_SIZE_NORMAL (16) /* 32 */ +#define BN_MUL_LOW_RECURSIVE_SIZE_NORMAL (32) /* 32 */ +#define BN_MONT_CTX_SET_SIZE_WORD (64) /* 32 */ + +#if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC) +/* + * BN_UMULT_HIGH section. + * + * No, I'm not trying to overwhelm you when stating that the + * product of N-bit numbers is 2*N bits wide:-) No, I don't expect + * you to be impressed when I say that if the compiler doesn't + * support 2*N integer type, then you have to replace every N*N + * multiplication with 4 (N/2)*(N/2) accompanied by some shifts + * and additions which unavoidably results in severe performance + * penalties. Of course provided that the hardware is capable of + * producing 2*N result... That's when you normally start + * considering assembler implementation. However! It should be + * pointed out that some CPUs (most notably Alpha, PowerPC and + * upcoming IA-64 family:-) provide *separate* instruction + * calculating the upper half of the product placing the result + * into a general purpose register. Now *if* the compiler supports + * inline assembler, then it's not impossible to implement the + * "bignum" routines (and have the compiler optimize 'em) + * exhibiting "native" performance in C. That's what BN_UMULT_HIGH + * macro is about:-) + * + * <appro@fy.chalmers.se> + */ +# if defined(__alpha) && (defined(SIXTY_FOUR_BIT_LONG) || defined(SIXTY_FOUR_BIT)) +# if defined(__DECC) +# include <c_asm.h> +# define BN_UMULT_HIGH(a,b) (BN_ULONG)asm("umulh %a0,%a1,%v0",(a),(b)) +# elif defined(__GNUC__) +# define BN_UMULT_HIGH(a,b) ({ \ + register BN_ULONG ret; \ + asm ("umulh %1,%2,%0" \ + : "=r"(ret) \ + : "r"(a), "r"(b)); \ + ret; }) +# endif /* compiler */ +# elif defined(_ARCH_PPC) && defined(__64BIT__) && defined(SIXTY_FOUR_BIT_LONG) +# if defined(__GNUC__) +# define BN_UMULT_HIGH(a,b) ({ \ + register BN_ULONG ret; \ + asm ("mulhdu %0,%1,%2" \ + : "=r"(ret) \ + : "r"(a), "r"(b)); \ + ret; }) +# endif /* compiler */ +# elif defined(__x86_64) && defined(SIXTY_FOUR_BIT_LONG) +# if defined(__GNUC__) +# define BN_UMULT_HIGH(a,b) ({ \ + register BN_ULONG ret,discard; \ + asm ("mulq %3" \ + : "=a"(discard),"=d"(ret) \ + : "a"(a), "g"(b) \ + : "cc"); \ + ret; }) +# define BN_UMULT_LOHI(low,high,a,b) \ + asm ("mulq %3" \ + : "=a"(low),"=d"(high) \ + : "a"(a),"g"(b) \ + : "cc"); +# endif +# elif (defined(_M_AMD64) || defined(_M_X64)) && defined(SIXTY_FOUR_BIT) +# if defined(_MSC_VER) && _MSC_VER>=1400 + unsigned __int64 __umulh (unsigned __int64 a,unsigned __int64 b); + unsigned __int64 _umul128 (unsigned __int64 a,unsigned __int64 b, + unsigned __int64 *h); +# pragma intrinsic(__umulh,_umul128) +# define BN_UMULT_HIGH(a,b) __umulh((a),(b)) +# define BN_UMULT_LOHI(low,high,a,b) ((low)=_umul128((a),(b),&(high))) +# endif +# endif /* cpu */ +#endif /* OPENSSL_NO_ASM */ + +/************************************************************* + * Using the long long type + */ +#define Lw(t) (((BN_ULONG)(t))&BN_MASK2) +#define Hw(t) (((BN_ULONG)((t)>>BN_BITS2))&BN_MASK2) + +#ifdef BN_DEBUG_RAND +#define bn_clear_top2max(a) \ + { \ + int ind = (a)->dmax - (a)->top; \ + BN_ULONG *ftl = &(a)->d[(a)->top-1]; \ + for (; ind != 0; ind--) \ + *(++ftl) = 0x0; \ + } +#else +#define bn_clear_top2max(a) +#endif + +#ifdef BN_LLONG +#define mul_add(r,a,w,c) { \ + BN_ULLONG t; \ + t=(BN_ULLONG)w * (a) + (r) + (c); \ + (r)= Lw(t); \ + (c)= Hw(t); \ + } + +#define mul(r,a,w,c) { \ + BN_ULLONG t; \ + t=(BN_ULLONG)w * (a) + (c); \ + (r)= Lw(t); \ + (c)= Hw(t); \ + } + +#define sqr(r0,r1,a) { \ + BN_ULLONG t; \ + t=(BN_ULLONG)(a)*(a); \ + (r0)=Lw(t); \ + (r1)=Hw(t); \ + } + +#elif defined(BN_UMULT_LOHI) +#define mul_add(r,a,w,c) { \ + BN_ULONG high,low,ret,tmp=(a); \ + ret = (r); \ + BN_UMULT_LOHI(low,high,w,tmp); \ + ret += (c); \ + (c) = (ret<(c))?1:0; \ + (c) += high; \ + ret += low; \ + (c) += (ret<low)?1:0; \ + (r) = ret; \ + } + +#define mul(r,a,w,c) { \ + BN_ULONG high,low,ret,ta=(a); \ + BN_UMULT_LOHI(low,high,w,ta); \ + ret = low + (c); \ + (c) = high; \ + (c) += (ret<low)?1:0; \ + (r) = ret; \ + } + +#define sqr(r0,r1,a) { \ + BN_ULONG tmp=(a); \ + BN_UMULT_LOHI(r0,r1,tmp,tmp); \ + } + +#elif defined(BN_UMULT_HIGH) +#define mul_add(r,a,w,c) { \ + BN_ULONG high,low,ret,tmp=(a); \ + ret = (r); \ + high= BN_UMULT_HIGH(w,tmp); \ + ret += (c); \ + low = (w) * tmp; \ + (c) = (ret<(c))?1:0; \ + (c) += high; \ + ret += low; \ + (c) += (ret<low)?1:0; \ + (r) = ret; \ + } + +#define mul(r,a,w,c) { \ + BN_ULONG high,low,ret,ta=(a); \ + low = (w) * ta; \ + high= BN_UMULT_HIGH(w,ta); \ + ret = low + (c); \ + (c) = high; \ + (c) += (ret<low)?1:0; \ + (r) = ret; \ + } + +#define sqr(r0,r1,a) { \ + BN_ULONG tmp=(a); \ + (r0) = tmp * tmp; \ + (r1) = BN_UMULT_HIGH(tmp,tmp); \ + } + +#else +/************************************************************* + * No long long type + */ + +#define LBITS(a) ((a)&BN_MASK2l) +#define HBITS(a) (((a)>>BN_BITS4)&BN_MASK2l) +#define L2HBITS(a) (((a)<<BN_BITS4)&BN_MASK2) + +#define LLBITS(a) ((a)&BN_MASKl) +#define LHBITS(a) (((a)>>BN_BITS2)&BN_MASKl) +#define LL2HBITS(a) ((BN_ULLONG)((a)&BN_MASKl)<<BN_BITS2) + +#define mul64(l,h,bl,bh) \ + { \ + BN_ULONG m,m1,lt,ht; \ + \ + lt=l; \ + ht=h; \ + m =(bh)*(lt); \ + lt=(bl)*(lt); \ + m1=(bl)*(ht); \ + ht =(bh)*(ht); \ + m=(m+m1)&BN_MASK2; if (m < m1) ht+=L2HBITS((BN_ULONG)1); \ + ht+=HBITS(m); \ + m1=L2HBITS(m); \ + lt=(lt+m1)&BN_MASK2; if (lt < m1) ht++; \ + (l)=lt; \ + (h)=ht; \ + } + +#define sqr64(lo,ho,in) \ + { \ + BN_ULONG l,h,m; \ + \ + h=(in); \ + l=LBITS(h); \ + h=HBITS(h); \ + m =(l)*(h); \ + l*=l; \ + h*=h; \ + h+=(m&BN_MASK2h1)>>(BN_BITS4-1); \ + m =(m&BN_MASK2l)<<(BN_BITS4+1); \ + l=(l+m)&BN_MASK2; if (l < m) h++; \ + (lo)=l; \ + (ho)=h; \ + } + +#define mul_add(r,a,bl,bh,c) { \ + BN_ULONG l,h; \ + \ + h= (a); \ + l=LBITS(h); \ + h=HBITS(h); \ + mul64(l,h,(bl),(bh)); \ + \ + /* non-multiply part */ \ + l=(l+(c))&BN_MASK2; if (l < (c)) h++; \ + (c)=(r); \ + l=(l+(c))&BN_MASK2; if (l < (c)) h++; \ + (c)=h&BN_MASK2; \ + (r)=l; \ + } + +#define mul(r,a,bl,bh,c) { \ + BN_ULONG l,h; \ + \ + h= (a); \ + l=LBITS(h); \ + h=HBITS(h); \ + mul64(l,h,(bl),(bh)); \ + \ + /* non-multiply part */ \ + l+=(c); if ((l&BN_MASK2) < (c)) h++; \ + (c)=h&BN_MASK2; \ + (r)=l&BN_MASK2; \ + } +#endif /* !BN_LLONG */ + +void bn_mul_normal(BN_ULONG *r,BN_ULONG *a,int na,BN_ULONG *b,int nb); +void bn_mul_comba8(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b); +void bn_mul_comba4(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b); +void bn_sqr_normal(BN_ULONG *r, const BN_ULONG *a, int n, BN_ULONG *tmp); +void bn_sqr_comba8(BN_ULONG *r,const BN_ULONG *a); +void bn_sqr_comba4(BN_ULONG *r,const BN_ULONG *a); +int bn_cmp_words(const BN_ULONG *a,const BN_ULONG *b,int n); +int bn_cmp_part_words(const BN_ULONG *a, const BN_ULONG *b, + int cl, int dl); +void bn_mul_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2, + int dna,int dnb,BN_ULONG *t); +void bn_mul_part_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b, + int n,int tna,int tnb,BN_ULONG *t); +void bn_sqr_recursive(BN_ULONG *r,const BN_ULONG *a, int n2, BN_ULONG *t); +void bn_mul_low_normal(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b, int n); +void bn_mul_low_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2, + BN_ULONG *t); +void bn_mul_high(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,BN_ULONG *l,int n2, + BN_ULONG *t); +BN_ULONG bn_add_part_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b, + int cl, int dl); +BN_ULONG bn_sub_part_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b, + int cl, int dl); +int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num); + +#ifdef __cplusplus +} +#endif + +#endif |