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/* Sha1.c -- SHA-1 Hash

: Igor Pavlov : Public domain

This code is based on public domain code of Steve Reid from Wei Dai's Crypto++ library. */

#include "Precomp.h"

#include <string.h>

#include "Sha1.h"

#include "RotateDefs.h"

#include "CpuArch.h"

#ifdef MY_CPU_X86_OR_AMD64

#if defined(Z7_LLVM_CLANG_VERSION) && (Z7_LLVM_CLANG_VERSION >= 30800) \

|| defined(Z7_APPLE_CLANG_VERSION) && (Z7_APPLE_CLANG_VERSION >= 50100) \

|| defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION >= 40900) \

|| defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 1600) \

|| defined(_MSC_VER) && (_MSC_VER >= 1200)

#define Z7_COMPILER_SHA1_SUPPORTED

#endif

#elif defined(MY_CPU_ARM_OR_ARM64) && defined(MY_CPU_LE) \

&& (!defined(Z7_MSC_VER_ORIGINAL) || (_MSC_VER >= 1929) && (_MSC_FULL_VER >= 192930037))

#if defined(__ARM_FEATURE_SHA2) \

|| defined(__ARM_FEATURE_CRYPTO)

#define Z7_COMPILER_SHA1_SUPPORTED

#else

#if defined(MY_CPU_ARM64) \

|| defined(__ARM_ARCH) && (__ARM_ARCH >= 4) \

|| defined(Z7_MSC_VER_ORIGINAL)

#if defined(__ARM_FP) && \

( defined(Z7_CLANG_VERSION) && (Z7_CLANG_VERSION >= 30800) \

|| defined(__GNUC__) && (__GNUC__ >= 6) \

) \

|| defined(Z7_MSC_VER_ORIGINAL) && (_MSC_VER >= 1910)

#if defined(MY_CPU_ARM64) \

|| !defined(Z7_CLANG_VERSION) \

|| defined(__ARM_NEON) && \

(Z7_CLANG_VERSION < 170000 || \

Z7_CLANG_VERSION > 170001)

#define Z7_COMPILER_SHA1_SUPPORTED

#endif

void Z7_FASTCALL Sha1_UpdateBlocks(UInt32 state[5], const Byte *data, size_t numBlocks);

#ifdef Z7_COMPILER_SHA1_SUPPORTED

void Z7_FASTCALL Sha1_UpdateBlocks_HW(UInt32 state[5], const Byte *data, size_t numBlocks);

static SHA1_FUNC_UPDATE_BLOCKS g_SHA1_FUNC_UPDATE_BLOCKS = Sha1_UpdateBlocks;

static SHA1_FUNC_UPDATE_BLOCKS g_SHA1_FUNC_UPDATE_BLOCKS_HW;

#define SHA1_UPDATE_BLOCKS(p) p->v.vars.func_UpdateBlocks

#else

#define SHA1_UPDATE_BLOCKS(p) Sha1_UpdateBlocks

#endif

BoolInt Sha1_SetFunction(CSha1 *p, unsigned algo)

{

SHA1_FUNC_UPDATE_BLOCKS func = Sha1_UpdateBlocks;

#ifdef Z7_COMPILER_SHA1_SUPPORTED

if (algo != SHA1_ALGO_SW)

{

if (algo == SHA1_ALGO_DEFAULT)

func = g_SHA1_FUNC_UPDATE_BLOCKS;

else

{

if (algo != SHA1_ALGO_HW)

return False;

func = g_SHA1_FUNC_UPDATE_BLOCKS_HW;

if (!func)

return False;

}

#else

if (algo > 1)

return False;

#endif

p->v.vars.func_UpdateBlocks = func;

return True;

}

/* define it for speed optimization */

// #define Z7_SHA1_UNROLL

// allowed unroll steps: (1, 2, 4, 5, 20)

#undef Z7_SHA1_BIG_W

#ifdef Z7_SHA1_UNROLL

#define STEP_PRE 20

#define STEP_MAIN 20

#else

#define Z7_SHA1_BIG_W

#define STEP_PRE 5

#define STEP_MAIN 5

#endif

#ifdef Z7_SHA1_BIG_W

#define kNumW 80

#define w(i) W[i]

#else

#define kNumW 16

#define w(i) W[(i)&15]

#endif

#define w0(i) (W[i] = GetBe32(data + (size_t)(i) * 4))

#define w1(i) (w(i) = rotlFixed(w((size_t)(i)-3) ^ w((size_t)(i)-8) ^ w((size_t)(i)-14) ^ w((size_t)(i)-16), 1))

#define f0(x,y,z) ( 0x5a827999 + (z^(x&(y^z))) )

#define f1(x,y,z) ( 0x6ed9eba1 + (x^y^z) )

#define f2(x,y,z) ( 0x8f1bbcdc + ((x&y)|(z&(x|y))) )

#define f3(x,y,z) ( 0xca62c1d6 + (x^y^z) )

#define T1(fx, ww) \

tmp = e + fx(b,c,d) + ww + rotlFixed(a, 5); \

e = d; \

d = c; \

c = rotlFixed(b, 30); \

b = a; \

a = tmp; \

#define T5(a,b,c,d,e, fx, ww) \

e += fx(b,c,d) + ww + rotlFixed(a, 5); \

b = rotlFixed(b, 30); \

#define R1(i, fx, wx) \

T1 ( fx, wx(i)); \

#define R2(i, fx, wx) \

R1 ( (i) , fx, wx); \

R1 ( (i) + 1, fx, wx); \

#define R4(i, fx, wx) \

R2 ( (i) , fx, wx); \

R2 ( (i) + 2, fx, wx); \

#define M5(i, fx, wx0, wx1) \

T5 ( a,b,c,d,e, fx, wx0((i) ) ) \

T5 ( e,a,b,c,d, fx, wx1((i)+1) ) \

T5 ( d,e,a,b,c, fx, wx1((i)+2) ) \

T5 ( c,d,e,a,b, fx, wx1((i)+3) ) \

T5 ( b,c,d,e,a, fx, wx1((i)+4) ) \

#define R5(i, fx, wx) \

M5 ( i, fx, wx, wx) \

#if STEP_PRE > 5

#define R20_START \

R5 ( 0, f0, w0) \

R5 ( 5, f0, w0) \

R5 ( 10, f0, w0) \

M5 ( 15, f0, w0, w1) \

#elif STEP_PRE == 5

#define R20_START \

{ size_t i; for (i = 0; i < 15; i += STEP_PRE) \

{ R5(i, f0, w0) } } \

M5 ( 15, f0, w0, w1) \

#else

#if STEP_PRE == 1

#define R_PRE R1

#elif STEP_PRE == 2

#define R_PRE R2

#elif STEP_PRE == 4

#define R_PRE R4

#endif

#define R20_START \

{ size_t i; for (i = 0; i < 16; i += STEP_PRE) \

{ R_PRE(i, f0, w0) } } \

R4 ( 16, f0, w1) \

#endif

#if STEP_MAIN > 5

#define R20(ii, fx) \

R5 ( (ii) , fx, w1) \

R5 ( (ii) + 5 , fx, w1) \

R5 ( (ii) + 10, fx, w1) \

R5 ( (ii) + 15, fx, w1) \

#else

#if STEP_MAIN == 1

#define R_MAIN R1

#elif STEP_MAIN == 2

#define R_MAIN R2

#elif STEP_MAIN == 4

#define R_MAIN R4

#elif STEP_MAIN == 5

#define R_MAIN R5

#endif

#define R20(ii, fx) \

{ size_t i; for (i = (ii); i < (ii) + 20; i += STEP_MAIN) \

{ R_MAIN(i, fx, w1) } } \

#endif

void Sha1_InitState(CSha1 *p)

{

p->v.vars.count = 0;

p->state[0] = 0x67452301;

p->state[1] = 0xEFCDAB89;

p->state[2] = 0x98BADCFE;

p->state[3] = 0x10325476;

p->state[4] = 0xC3D2E1F0;

}

void Sha1_Init(CSha1 *p)

{

p->v.vars.func_UpdateBlocks =

#ifdef Z7_COMPILER_SHA1_SUPPORTED

g_SHA1_FUNC_UPDATE_BLOCKS;

#else

NULL;

#endif

Sha1_InitState(p);

}

Z7_NO_INLINE

void Z7_FASTCALL Sha1_UpdateBlocks(UInt32 state[5], const Byte *data, size_t numBlocks)

{

UInt32 a, b, c, d, e;

UInt32 W[kNumW];

if (numBlocks == 0)

return;

a = state[0];

b = state[1];

c = state[2];

d = state[3];

e = state[4];

{

#if STEP_PRE < 5 || STEP_MAIN < 5

UInt32 tmp;

#endif

R20_START

R20(20, f1)

R20(40, f2)

R20(60, f3)

a += state[0];

b += state[1];

c += state[2];

d += state[3];

e += state[4];

state[0] = a;

state[1] = b;

state[2] = c;

state[3] = d;

state[4] = e;

data += SHA1_BLOCK_SIZE;

}

while (--numBlocks);

}

#define Sha1_UpdateBlock(p) SHA1_UPDATE_BLOCKS(p)(p->state, p->buffer, 1)

void Sha1_Update(CSha1 *p, const Byte *data, size_t size)

{

if (size == 0)

return;

{

const unsigned pos = (unsigned)p->v.vars.count & (SHA1_BLOCK_SIZE - 1);

const unsigned num = SHA1_BLOCK_SIZE - pos;

p->v.vars.count += size;

if (num > size)

{

memcpy(p->buffer + pos, data, size);

return;

}

if (pos != 0)

{

size -= num;

memcpy(p->buffer + pos, data, num);

data += num;

Sha1_UpdateBlock(p);

}

{

const size_t numBlocks = size >> 6;

// if (numBlocks)

SHA1_UPDATE_BLOCKS(p)(p->state, data, numBlocks);

size &= SHA1_BLOCK_SIZE - 1;

if (size == 0)

return;

data += (numBlocks << 6);

memcpy(p->buffer, data, size);

}

void Sha1_Final(CSha1 *p, Byte *digest)

{

unsigned pos = (unsigned)p->v.vars.count & (SHA1_BLOCK_SIZE - 1);

p->buffer[pos++] = 0x80;

if (pos > (SHA1_BLOCK_SIZE - 4 * 2))

{

while (pos != SHA1_BLOCK_SIZE) { p->buffer[pos++] = 0; }

// memset(&p->buf.buffer[pos], 0, SHA1_BLOCK_SIZE - pos);

Sha1_UpdateBlock(p);

pos = 0;

}

memset(&p->buffer[pos], 0, (SHA1_BLOCK_SIZE - 4 * 2) - pos);

{

const UInt64 numBits = p->v.vars.count << 3;

SetBe32(p->buffer + SHA1_BLOCK_SIZE - 4 * 2, (UInt32)(numBits >> 32))

SetBe32(p->buffer + SHA1_BLOCK_SIZE - 4 * 1, (UInt32)(numBits))

}

Sha1_UpdateBlock(p);

SetBe32(digest, p->state[0])

SetBe32(digest + 4, p->state[1])

SetBe32(digest + 8, p->state[2])

SetBe32(digest + 12, p->state[3])

SetBe32(digest + 16, p->state[4])

Sha1_InitState(p);

}

void Sha1_PrepareBlock(const CSha1 *p, Byte *block, unsigned size)

{

const UInt64 numBits = (p->v.vars.count + size) << 3;

SetBe32(&((UInt32 *)(void *)block)[SHA1_NUM_BLOCK_WORDS - 2], (UInt32)(numBits >> 32))

SetBe32(&((UInt32 *)(void *)block)[SHA1_NUM_BLOCK_WORDS - 1], (UInt32)(numBits))

// SetBe32((UInt32 *)(block + size), 0x80000000);

SetUi32((UInt32 *)(void *)(block + size), 0x80)

size += 4;

while (size != (SHA1_NUM_BLOCK_WORDS - 2) * 4)

{

*((UInt32 *)(void *)(block + size)) = 0;

size += 4;

}

void Sha1_GetBlockDigest(const CSha1 *p, const Byte *data, Byte *destDigest)

{

MY_ALIGN (16)

UInt32 st[SHA1_NUM_DIGEST_WORDS];

st[0] = p->state[0];

st[1] = p->state[1];

st[2] = p->state[2];

st[3] = p->state[3];

st[4] = p->state[4];

SHA1_UPDATE_BLOCKS(p)(st, data, 1);

SetBe32(destDigest + 0 , st[0])

SetBe32(destDigest + 1 * 4, st[1])

SetBe32(destDigest + 2 * 4, st[2])

SetBe32(destDigest + 3 * 4, st[3])

SetBe32(destDigest + 4 * 4, st[4])

}

void Sha1Prepare(void)

{

#ifdef Z7_COMPILER_SHA1_SUPPORTED

SHA1_FUNC_UPDATE_BLOCKS f, f_hw;

f = Sha1_UpdateBlocks;

f_hw = NULL;

#ifdef MY_CPU_X86_OR_AMD64

if (CPU_IsSupported_SHA()

&& CPU_IsSupported_SSSE3()

)

#else

if (CPU_IsSupported_SHA1())

#endif

{

// printf("\n========== HW SHA1 ======== \n");

#if 1 && defined(MY_CPU_ARM_OR_ARM64) && defined(Z7_MSC_VER_ORIGINAL) && (_MSC_FULL_VER < 192930037)

/* there was bug in MSVC compiler for ARM64 -O2 before version VS2019 16.10 (19.29.30037).

It generated incorrect SHA-1 code. */

#pragma message("== SHA1 code can work incorrectly with this compiler")

#error Stop_Compiling_MSC_Compiler_BUG_SHA1

#endif

{

f = f_hw = Sha1_UpdateBlocks_HW;

}

g_SHA1_FUNC_UPDATE_BLOCKS = f;

g_SHA1_FUNC_UPDATE_BLOCKS_HW = f_hw;

#endif

}

#undef kNumW

#undef w

#undef w0

#undef w1

#undef f0

#undef f1

#undef f2

#undef f3

#undef T1

#undef T5

#undef M5

#undef R1

#undef R2

#undef R4

#undef R5

#undef R20_START

#undef R_PRE

#undef R_MAIN

#undef STEP_PRE

#undef STEP_MAIN

#undef Z7_SHA1_BIG_W

#undef Z7_SHA1_UNROLL

#undef Z7_COMPILER_SHA1_SUPPORTED

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