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openssl/include/crypto/md32_common.h
Hongren (Zenithal) Zheng eea820f3e2 Add ROTATE inline asm support for SM3 
And move ROTATE inline asm to header.

Now this benefits SM3, SHA (when with Zbb only and no Zknh)
and other hash functions

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18287)
2022-06-22 12:46:50 +02:00

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/*
* Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*-
* 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 converting 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
*/
#ifndef OSSL_CRYPTO_MD32_COMMON_H
# define OSSL_CRYPTO_MD32_COMMON_H
# pragma once
# include <openssl/crypto.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
# ifndef HASH_FINAL
# error "HASH_FINAL must be defined!"
# endif
# ifndef HASH_BLOCK_DATA_ORDER
# error "HASH_BLOCK_DATA_ORDER must be defined!"
# endif
# define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#ifndef PEDANTIC
# if defined(__GNUC__) && __GNUC__>=2 && \
!defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
# if defined(__riscv_zbb) || defined(__riscv_zbkb)
# if __riscv_xlen == 64
# undef ROTATE
# define ROTATE(x, n) ({ MD32_REG_T ret; \
asm ("roriw %0, %1, %2" \
: "=r"(ret) \
: "r"(x), "i"(32 - (n))); ret;})
# endif
# if __riscv_xlen == 32
# undef ROTATE
# define ROTATE(x, n) ({ MD32_REG_T ret; \
asm ("rori %0, %1, %2" \
: "=r"(ret) \
: "r"(x), "i"(32 - (n))); ret;})
# endif
# endif
# endif
#endif
# if defined(DATA_ORDER_IS_BIG_ENDIAN)
# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
l|=(((unsigned long)(*((c)++)))<<16), \
l|=(((unsigned long)(*((c)++)))<< 8), \
l|=(((unsigned long)(*((c)++))) ) )
# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff), \
l)
# elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
# define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
l|=(((unsigned long)(*((c)++)))<< 8), \
l|=(((unsigned long)(*((c)++)))<<16), \
l|=(((unsigned long)(*((c)++)))<<24) )
# define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>>24)&0xff), \
l)
# 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;
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;
/*
* We use memset rather than OPENSSL_cleanse() here deliberately.
* Using OPENSSL_cleanse() here could be a performance issue. It
* will get properly cleansed on finalisation so this isn't a
* security problem.
*/
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);
}
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)
(void)HOST_l2c(c->Nh, p);
(void)HOST_l2c(c->Nl, p);
# elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
(void)HOST_l2c(c->Nl, p);
(void)HOST_l2c(c->Nh, p);
# endif
p -= HASH_CBLOCK;
HASH_BLOCK_DATA_ORDER(c, p, 1);
c->num = 0;
OPENSSL_cleanse(p, HASH_CBLOCK);
# ifndef HASH_MAKE_STRING
# error "HASH_MAKE_STRING must be defined!"
# else
HASH_MAKE_STRING(c, md);
# endif
return 1;
}
# ifndef MD32_REG_T
# if defined(__alpha) || defined(__sparcv9) || defined(__mips)
# define MD32_REG_T long
/*
* This comment was originally 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.
*/
# 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.
*/
# define MD32_REG_T int
# endif
# endif
#endif
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