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Diffstat (limited to 'lib/libcrypto/md32_common.h')
| -rw-r--r-- | lib/libcrypto/md32_common.h | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/lib/libcrypto/md32_common.h b/lib/libcrypto/md32_common.h new file mode 100644 index 0000000..0dca617 --- /dev/null +++ b/lib/libcrypto/md32_common.h @@ -0,0 +1,345 @@ +/* $OpenBSD: md32_common.h,v 1.22 2016/11/04 13:56:04 miod Exp $ */ +/* ==================================================================== + * Copyright (c) 1999-2007 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 + * licensing@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 is a generic 32 bit "collector" for message digest algorithms. + * Whenever needed it collects input character stream into chunks of + * 32 bit values and invokes a block function that performs actual hash + * calculations. + * + * Porting guide. + * + * Obligatory macros: + * + * DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN + * this macro defines byte order of input stream. + * HASH_CBLOCK + * size of a unit chunk HASH_BLOCK operates on. + * HASH_LONG + * has to be at least 32 bit wide. + * HASH_CTX + * context structure that at least contains following + * members: + * typedef struct { + * ... + * HASH_LONG Nl,Nh; + * either { + * HASH_LONG data[HASH_LBLOCK]; + * unsigned char data[HASH_CBLOCK]; + * }; + * unsigned int num; + * ... + * } HASH_CTX; + * data[] vector is expected to be zeroed upon first call to + * HASH_UPDATE. + * HASH_UPDATE + * name of "Update" function, implemented here. + * HASH_TRANSFORM + * name of "Transform" function, implemented here. + * HASH_FINAL + * name of "Final" function, implemented here. + * HASH_BLOCK_DATA_ORDER + * name of "block" function capable of treating *unaligned* input + * message in original (data) byte order, implemented externally. + * HASH_MAKE_STRING + * macro convering context variables to an ASCII hash string. + * + * MD5 example: + * + * #define DATA_ORDER_IS_LITTLE_ENDIAN + * + * #define HASH_LONG MD5_LONG + * #define HASH_CTX MD5_CTX + * #define HASH_CBLOCK MD5_CBLOCK + * #define HASH_UPDATE MD5_Update + * #define HASH_TRANSFORM MD5_Transform + * #define HASH_FINAL MD5_Final + * #define HASH_BLOCK_DATA_ORDER md5_block_data_order + * + * <appro@fy.chalmers.se> + */ + +#include <stdint.h> + +#include <openssl/opensslconf.h> + +#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN) +#error "DATA_ORDER must be defined!" +#endif + +#ifndef HASH_CBLOCK +#error "HASH_CBLOCK must be defined!" +#endif +#ifndef HASH_LONG +#error "HASH_LONG must be defined!" +#endif +#ifndef HASH_CTX +#error "HASH_CTX must be defined!" +#endif + +#ifndef HASH_UPDATE +#error "HASH_UPDATE must be defined!" +#endif +#ifndef HASH_TRANSFORM +#error "HASH_TRANSFORM must be defined!" +#endif +#if !defined(HASH_FINAL) && !defined(HASH_NO_FINAL) +#error "HASH_FINAL or HASH_NO_FINAL must be defined!" +#endif + +#ifndef HASH_BLOCK_DATA_ORDER +#error "HASH_BLOCK_DATA_ORDER must be defined!" +#endif + +/* + * This common idiom is recognized by the compiler and turned into a + * CPU-specific intrinsic as appropriate. + * e.g. GCC optimizes to roll on amd64 at -O0 + */ +static inline uint32_t ROTATE(uint32_t a, uint32_t n) +{ + return (a<<n)|(a>>(32-n)); +} + +#if defined(DATA_ORDER_IS_BIG_ENDIAN) + +#if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) +# if (defined(__i386) || defined(__i386__) || \ + defined(__x86_64) || defined(__x86_64__)) + /* + * This gives ~30-40% performance improvement in SHA-256 compiled + * with gcc [on P4]. Well, first macro to be frank. We can pull + * this trick on x86* platforms only, because these CPUs can fetch + * unaligned data without raising an exception. + */ +# define HOST_c2l(c,l) ({ unsigned int r=*((const unsigned int *)(c)); \ + asm ("bswapl %0":"=r"(r):"0"(r)); \ + (c)+=4; (l)=r; }) +# define HOST_l2c(l,c) ({ unsigned int r=(l); \ + asm ("bswapl %0":"=r"(r):"0"(r)); \ + *((unsigned int *)(c))=r; (c)+=4; }) +# endif +#endif + +#ifndef HOST_c2l +#define HOST_c2l(c,l) do {l =(((unsigned long)(*((c)++)))<<24); \ + l|=(((unsigned long)(*((c)++)))<<16); \ + l|=(((unsigned long)(*((c)++)))<< 8); \ + l|=(((unsigned long)(*((c)++))) ); \ + } while (0) +#endif +#ifndef HOST_l2c +#define HOST_l2c(l,c) do {*((c)++)=(unsigned char)(((l)>>24)&0xff); \ + *((c)++)=(unsigned char)(((l)>>16)&0xff); \ + *((c)++)=(unsigned char)(((l)>> 8)&0xff); \ + *((c)++)=(unsigned char)(((l) )&0xff); \ + } while (0) +#endif + +#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN) + +#if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) +# define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4) +# define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4) +#endif + +#ifndef HOST_c2l +#define HOST_c2l(c,l) do {l =(((unsigned long)(*((c)++))) ); \ + l|=(((unsigned long)(*((c)++)))<< 8); \ + l|=(((unsigned long)(*((c)++)))<<16); \ + l|=(((unsigned long)(*((c)++)))<<24); \ + } while (0) +#endif +#ifndef HOST_l2c +#define HOST_l2c(l,c) do {*((c)++)=(unsigned char)(((l) )&0xff); \ + *((c)++)=(unsigned char)(((l)>> 8)&0xff); \ + *((c)++)=(unsigned char)(((l)>>16)&0xff); \ + *((c)++)=(unsigned char)(((l)>>24)&0xff); \ + } while (0) +#endif + +#endif + +/* + * Time for some action:-) + */ + +int +HASH_UPDATE(HASH_CTX *c, const void *data_, size_t len) +{ + const unsigned char *data = data_; + unsigned char *p; + HASH_LONG l; + size_t n; + + if (len == 0) + return 1; + + l = (c->Nl + (((HASH_LONG)len) << 3))&0xffffffffUL; + /* 95-05-24 eay Fixed a bug with the overflow handling, thanks to + * Wei Dai <weidai@eskimo.com> for pointing it out. */ + if (l < c->Nl) /* overflow */ + c->Nh++; + c->Nh+=(HASH_LONG)(len>>29); /* might cause compiler warning on 16-bit */ + c->Nl = l; + + n = c->num; + if (n != 0) { + p = (unsigned char *)c->data; + + if (len >= HASH_CBLOCK || len + n >= HASH_CBLOCK) { + memcpy (p + n, data, HASH_CBLOCK - n); + HASH_BLOCK_DATA_ORDER (c, p, 1); + n = HASH_CBLOCK - n; + data += n; + len -= n; + c->num = 0; + memset (p,0,HASH_CBLOCK); /* keep it zeroed */ + } else { + memcpy (p + n, data, len); + c->num += (unsigned int)len; + return 1; + } + } + + n = len/HASH_CBLOCK; + if (n > 0) { + HASH_BLOCK_DATA_ORDER (c, data, n); + n *= HASH_CBLOCK; + data += n; + len -= n; + } + + if (len != 0) { + p = (unsigned char *)c->data; + c->num = (unsigned int)len; + memcpy (p, data, len); + } + return 1; +} + + +void HASH_TRANSFORM (HASH_CTX *c, const unsigned char *data) +{ + HASH_BLOCK_DATA_ORDER (c, data, 1); +} + + +#ifndef HASH_NO_FINAL +int HASH_FINAL (unsigned char *md, HASH_CTX *c) +{ + unsigned char *p = (unsigned char *)c->data; + size_t n = c->num; + + p[n] = 0x80; /* there is always room for one */ + n++; + + if (n > (HASH_CBLOCK - 8)) { + memset (p + n, 0, HASH_CBLOCK - n); + n = 0; + HASH_BLOCK_DATA_ORDER (c, p, 1); + } + memset (p + n, 0, HASH_CBLOCK - 8 - n); + + p += HASH_CBLOCK - 8; +#if defined(DATA_ORDER_IS_BIG_ENDIAN) + HOST_l2c(c->Nh, p); + HOST_l2c(c->Nl, p); +#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN) + HOST_l2c(c->Nl, p); + HOST_l2c(c->Nh, p); +#endif + p -= HASH_CBLOCK; + HASH_BLOCK_DATA_ORDER (c, p, 1); + c->num = 0; + memset (p, 0, HASH_CBLOCK); + +#ifndef HASH_MAKE_STRING +#error "HASH_MAKE_STRING must be defined!" +#else + HASH_MAKE_STRING(c, md); +#endif + + return 1; +} +#endif + +#ifndef MD32_REG_T +#if defined(__alpha) || defined(__sparcv9) || defined(__mips) +#define MD32_REG_T long +/* + * This comment was originaly written for MD5, which is why it + * discusses A-D. But it basically applies to all 32-bit digests, + * which is why it was moved to common header file. + * + * In case you wonder why A-D are declared as long and not + * as MD5_LONG. Doing so results in slight performance + * boost on LP64 architectures. The catch is we don't + * really care if 32 MSBs of a 64-bit register get polluted + * with eventual overflows as we *save* only 32 LSBs in + * *either* case. Now declaring 'em long excuses the compiler + * from keeping 32 MSBs zeroed resulting in 13% performance + * improvement under SPARC Solaris7/64 and 5% under AlphaLinux. + * Well, to be honest it should say that this *prevents* + * performance degradation. + * <appro@fy.chalmers.se> + */ +#else +/* + * Above is not absolute and there are LP64 compilers that + * generate better code if MD32_REG_T is defined int. The above + * pre-processor condition reflects the circumstances under which + * the conclusion was made and is subject to further extension. + * <appro@fy.chalmers.se> + */ +#define MD32_REG_T int +#endif +#endif |