зеркало из https://github.com/mozilla/gecko-dev.git
172 строки
4.1 KiB
C
172 строки
4.1 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _SHA_FAST_H_
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#define _SHA_FAST_H_
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#include "prlong.h"
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#define SHA1_INPUT_LEN 64
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#if defined(IS_64) && !defined(__sparc)
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typedef PRUint64 SHA_HW_t;
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#define SHA1_USING_64_BIT 1
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#else
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typedef PRUint32 SHA_HW_t;
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#endif
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struct SHA1ContextStr {
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union {
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PRUint32 w[16]; /* input buffer */
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PRUint8 b[64];
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} u;
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PRUint64 size; /* count of hashed bytes. */
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SHA_HW_t H[22]; /* 5 state variables, 16 tmp values, 1 extra */
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};
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#if defined(_MSC_VER)
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#include <stdlib.h>
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#if defined(IS_LITTLE_ENDIAN)
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#if (_MSC_VER >= 1300)
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#pragma intrinsic(_byteswap_ulong)
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#define SHA_HTONL(x) _byteswap_ulong(x)
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#elif defined(NSS_X86_OR_X64)
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#ifndef FORCEINLINE
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#if (_MSC_VER >= 1200)
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#define FORCEINLINE __forceinline
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#else
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#define FORCEINLINE __inline
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#endif /* _MSC_VER */
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#endif /* !defined FORCEINLINE */
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#define FASTCALL __fastcall
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static FORCEINLINE PRUint32 FASTCALL
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swap4b(PRUint32 dwd)
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{
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__asm {
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mov eax,dwd
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bswap eax
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}
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}
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#define SHA_HTONL(x) swap4b(x)
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#endif /* NSS_X86_OR_X64 */
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#endif /* IS_LITTLE_ENDIAN */
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#pragma intrinsic (_lrotr, _lrotl)
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#define SHA_ROTL(x,n) _lrotl(x,n)
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#define SHA_ROTL_IS_DEFINED 1
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#endif /* _MSC_VER */
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#if defined(__GNUC__)
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/* __x86_64__ and __x86_64 are defined by GCC on x86_64 CPUs */
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#if defined( SHA1_USING_64_BIT )
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static __inline__ PRUint64 SHA_ROTL(PRUint64 x, PRUint32 n)
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{
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PRUint32 t = (PRUint32)x;
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return ((t << n) | (t >> (32 - n)));
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}
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#else
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static __inline__ PRUint32 SHA_ROTL(PRUint32 t, PRUint32 n)
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{
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return ((t << n) | (t >> (32 - n)));
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}
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#endif
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#define SHA_ROTL_IS_DEFINED 1
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#if defined(NSS_X86_OR_X64)
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static __inline__ PRUint32 swap4b(PRUint32 value)
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{
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__asm__("bswap %0" : "+r" (value));
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return (value);
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}
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#define SHA_HTONL(x) swap4b(x)
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#elif defined(__thumb2__) || \
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(!defined(__thumb__) && \
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(defined(__ARM_ARCH_6__) || \
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defined(__ARM_ARCH_6J__) || \
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defined(__ARM_ARCH_6K__) || \
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defined(__ARM_ARCH_6Z__) || \
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defined(__ARM_ARCH_6ZK__) || \
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defined(__ARM_ARCH_6T2__) || \
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defined(__ARM_ARCH_7__) || \
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defined(__ARM_ARCH_7A__) || \
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defined(__ARM_ARCH_7R__)))
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static __inline__ PRUint32 swap4b(PRUint32 value)
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{
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PRUint32 ret;
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__asm__("rev %0, %1" : "=r" (ret) : "r"(value));
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return ret;
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}
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#define SHA_HTONL(x) swap4b(x)
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#endif /* x86 family */
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#endif /* __GNUC__ */
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#if !defined(SHA_ROTL_IS_DEFINED)
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#define SHA_NEED_TMP_VARIABLE 1
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#define SHA_ROTL(X,n) (tmp = (X), ((tmp) << (n)) | ((tmp) >> (32-(n))))
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#endif
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#if defined(NSS_X86_OR_X64)
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#define SHA_ALLOW_UNALIGNED_ACCESS 1
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#endif
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#if !defined(SHA_HTONL)
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#define SHA_MASK 0x00FF00FF
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#if defined(IS_LITTLE_ENDIAN)
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#undef SHA_NEED_TMP_VARIABLE
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#define SHA_NEED_TMP_VARIABLE 1
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#define SHA_HTONL(x) (tmp = (x), tmp = (tmp << 16) | (tmp >> 16), \
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((tmp & SHA_MASK) << 8) | ((tmp >> 8) & SHA_MASK))
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#else
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#define SHA_HTONL(x) (x)
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#endif
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#endif
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#define SHA_BYTESWAP(x) x = SHA_HTONL(x)
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#define SHA_STORE(n) ((PRUint32*)hashout)[n] = SHA_HTONL(ctx->H[n])
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#if defined(SHA_ALLOW_UNALIGNED_ACCESS)
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#define SHA_STORE_RESULT \
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SHA_STORE(0); \
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SHA_STORE(1); \
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SHA_STORE(2); \
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SHA_STORE(3); \
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SHA_STORE(4);
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#elif defined(IS_LITTLE_ENDIAN) || defined( SHA1_USING_64_BIT )
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#define SHA_STORE_RESULT \
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if (!((ptrdiff_t)hashout % sizeof(PRUint32))) { \
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SHA_STORE(0); \
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SHA_STORE(1); \
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SHA_STORE(2); \
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SHA_STORE(3); \
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SHA_STORE(4); \
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} else { \
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tmpbuf[0] = SHA_HTONL(ctx->H[0]); \
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tmpbuf[1] = SHA_HTONL(ctx->H[1]); \
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tmpbuf[2] = SHA_HTONL(ctx->H[2]); \
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tmpbuf[3] = SHA_HTONL(ctx->H[3]); \
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tmpbuf[4] = SHA_HTONL(ctx->H[4]); \
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memcpy(hashout, tmpbuf, SHA1_LENGTH); \
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}
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#else
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#define SHA_STORE_RESULT \
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if (!((ptrdiff_t)hashout % sizeof(PRUint32))) { \
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SHA_STORE(0); \
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SHA_STORE(1); \
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SHA_STORE(2); \
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SHA_STORE(3); \
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SHA_STORE(4); \
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} else { \
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memcpy(hashout, ctx->H, SHA1_LENGTH); \
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}
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#endif
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#endif /* _SHA_FAST_H_ */
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