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dogecoin/src/crypto/sha1.cpp

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// Copyright (c) 2014 The Bitcoin Core developers
// Copyright (c) 2022 The Dogecoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "crypto/sha1.h"
#include "crypto/common.h"
#include <string.h>
#if (defined(__ia64__) || defined(__x86_64__)) && \
!defined(__APPLE__) && \
(defined(USE_AVX2))
#include <intel-ipsec-mb.h>
#endif
#if defined(__arm__) || defined(__aarch32__) || defined(__arm64__) || defined(__aarch64__) || defined(_M_ARM)
# if defined(__GNUC__)
# include <stdint.h>
# endif
# if defined(__ARM_NEON)|| defined(_MSC_VER) || defined(__GNUC__)
# include <arm_neon.h>
# endif
/** GCC and LLVM Clang, but not Apple Clang */
# if defined(__GNUC__) && !defined(__apple_build_version__)
# if defined(__ARM_ACLE) || defined(__ARM_FEATURE_CRYPTO)
# include "compat/arm_acle_selector.h"
# endif
# endif
#endif /** ARM Headers */
// Internal implementation code.
namespace
{
/// Internal SHA-1 implementation.
namespace sha1
{
/** One round of SHA-1. */
void inline Round(uint32_t a, uint32_t& b, uint32_t c, uint32_t d, uint32_t& e, uint32_t f, uint32_t k, uint32_t w)
{
e += ((a << 5) | (a >> 27)) + f + k + w;
b = (b << 30) | (b >> 2);
}
uint32_t inline f1(uint32_t b, uint32_t c, uint32_t d) { return d ^ (b & (c ^ d)); }
uint32_t inline f2(uint32_t b, uint32_t c, uint32_t d) { return b ^ c ^ d; }
uint32_t inline f3(uint32_t b, uint32_t c, uint32_t d) { return (b & c) | (d & (b | c)); }
uint32_t inline left(uint32_t x) { return (x << 1) | (x >> 31); }
/** Initialize SHA-1 state. */
void inline Initialize(uint32_t* s)
{
s[0] = 0x67452301ul;
s[1] = 0xEFCDAB89ul;
s[2] = 0x98BADCFEul;
s[3] = 0x10325476ul;
s[4] = 0xC3D2E1F0ul;
}
const uint32_t k1 = 0x5A827999ul;
const uint32_t k2 = 0x6ED9EBA1ul;
const uint32_t k3 = 0x8F1BBCDCul;
const uint32_t k4 = 0xCA62C1D6ul;
/** Perform a SHA-1 transformation, processing a 64-byte chunk. (ARMv8) */
void Transform_ARMV8(uint32_t* s, const unsigned char* chunk)
{
#if defined(USE_ARMV8) || defined(USE_ARMV82)
uint32x4_t ABCD, ABCD_SAVED;
uint32x4_t TMP0, TMP1;
uint32x4_t MSG0, MSG1, MSG2, MSG3;
uint32_t E0, E0_SAVED, E1;
/** Load state */
ABCD = vld1q_u32(&s[0]);
E0 = s[4];
/** Save state */
ABCD_SAVED = ABCD;
E0_SAVED = E0;
/** Load message */
MSG0 = vld1q_u32((const uint32_t*)(chunk));
MSG1 = vld1q_u32((const uint32_t*)(chunk + 16));
MSG2 = vld1q_u32((const uint32_t*)(chunk + 32));
MSG3 = vld1q_u32((const uint32_t*)(chunk + 48));
/** Reverse for little endian */
MSG0 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(MSG0)));
MSG1 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(MSG1)));
MSG2 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(MSG2)));
MSG3 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(MSG3)));
TMP0 = vaddq_u32(MSG0, vdupq_n_u32(0x5A827999));
TMP1 = vaddq_u32(MSG1, vdupq_n_u32(0x5A827999));
/** Rounds 0-3 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1cq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG2, vdupq_n_u32(0x5A827999));
MSG0 = vsha1su0q_u32(MSG0, MSG1, MSG2);
/** Rounds 4-7 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1cq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG3, vdupq_n_u32(0x5A827999));
MSG0 = vsha1su1q_u32(MSG0, MSG3);
MSG1 = vsha1su0q_u32(MSG1, MSG2, MSG3);
/** Rounds 8-11 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1cq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG0, vdupq_n_u32(0x5A827999));
MSG1 = vsha1su1q_u32(MSG1, MSG0);
MSG2 = vsha1su0q_u32(MSG2, MSG3, MSG0);
/** Rounds 12-15 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1cq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG1, vdupq_n_u32(0x6ED9EBA1));
MSG2 = vsha1su1q_u32(MSG2, MSG1);
MSG3 = vsha1su0q_u32(MSG3, MSG0, MSG1);
/** Rounds 16-19 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1cq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG2, vdupq_n_u32(0x6ED9EBA1));
MSG3 = vsha1su1q_u32(MSG3, MSG2);
MSG0 = vsha1su0q_u32(MSG0, MSG1, MSG2);
/** Rounds 20-23 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG3, vdupq_n_u32(0x6ED9EBA1));
MSG0 = vsha1su1q_u32(MSG0, MSG3);
MSG1 = vsha1su0q_u32(MSG1, MSG2, MSG3);
/** Rounds 24-27 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG0, vdupq_n_u32(0x6ED9EBA1));
MSG1 = vsha1su1q_u32(MSG1, MSG0);
MSG2 = vsha1su0q_u32(MSG2, MSG3, MSG0);
/** Rounds 28-31 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG1, vdupq_n_u32(0x6ED9EBA1));
MSG2 = vsha1su1q_u32(MSG2, MSG1);
MSG3 = vsha1su0q_u32(MSG3, MSG0, MSG1);
/** Rounds 32-35 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG2, vdupq_n_u32(0x8F1BBCDC));
MSG3 = vsha1su1q_u32(MSG3, MSG2);
MSG0 = vsha1su0q_u32(MSG0, MSG1, MSG2);
/** Rounds 36-39 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG3, vdupq_n_u32(0x8F1BBCDC));
MSG0 = vsha1su1q_u32(MSG0, MSG3);
MSG1 = vsha1su0q_u32(MSG1, MSG2, MSG3);
/** Rounds 40-43 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1mq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG0, vdupq_n_u32(0x8F1BBCDC));
MSG1 = vsha1su1q_u32(MSG1, MSG0);
MSG2 = vsha1su0q_u32(MSG2, MSG3, MSG0);
/** Rounds 44-47 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1mq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG1, vdupq_n_u32(0x8F1BBCDC));
MSG2 = vsha1su1q_u32(MSG2, MSG1);
MSG3 = vsha1su0q_u32(MSG3, MSG0, MSG1);
/** Rounds 48-51 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1mq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG2, vdupq_n_u32(0x8F1BBCDC));
MSG3 = vsha1su1q_u32(MSG3, MSG2);
MSG0 = vsha1su0q_u32(MSG0, MSG1, MSG2);
/** Rounds 52-55 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1mq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG3, vdupq_n_u32(0xCA62C1D6));
MSG0 = vsha1su1q_u32(MSG0, MSG3);
MSG1 = vsha1su0q_u32(MSG1, MSG2, MSG3);
/** Rounds 56-59 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1mq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG0, vdupq_n_u32(0xCA62C1D6));
MSG1 = vsha1su1q_u32(MSG1, MSG0);
MSG2 = vsha1su0q_u32(MSG2, MSG3, MSG0);
/** Rounds 60-63 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG1, vdupq_n_u32(0xCA62C1D6));
MSG2 = vsha1su1q_u32(MSG2, MSG1);
MSG3 = vsha1su0q_u32(MSG3, MSG0, MSG1);
/** Rounds 64-67 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E0, TMP0);
TMP0 = vaddq_u32(MSG2, vdupq_n_u32(0xCA62C1D6));
MSG3 = vsha1su1q_u32(MSG3, MSG2);
MSG0 = vsha1su0q_u32(MSG0, MSG1, MSG2);
/** Rounds 68-71 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
TMP1 = vaddq_u32(MSG3, vdupq_n_u32(0xCA62C1D6));
MSG0 = vsha1su1q_u32(MSG0, MSG3);
/** Rounds 72-75 */
E1 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E0, TMP0);
/** Rounds 76-79 */
E0 = vsha1h_u32(vgetq_lane_u32(ABCD, 0));
ABCD = vsha1pq_u32(ABCD, E1, TMP1);
/** Combine state */
E0 += E0_SAVED;
ABCD = vaddq_u32(ABCD_SAVED, ABCD);
/** Save state */
vst1q_u32(&s[0], ABCD);
s[4] = E0;
#endif
}
/** Perform a SHA-1 transformation, processing a 64-byte chunk. (AVX2) */
void Transform_AVX2(uint32_t* s, const unsigned char* chunk)
{
#if USE_AVX2
// Perform SHA1 one block (Intel AVX2)
sha1_one_block_avx2(chunk, s);
#endif
}
/** Perform a SHA-1 transformation, processing a 64-byte chunk. */
void Transform(uint32_t* s, const unsigned char* chunk)
{
// Perform SHA one block (legacy)
uint32_t a = s[0], b = s[1], c = s[2], d = s[3], e = s[4];
uint32_t w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
Round(a, b, c, d, e, f1(b, c, d), k1, w0 = ReadBE32(chunk + 0));
Round(e, a, b, c, d, f1(a, b, c), k1, w1 = ReadBE32(chunk + 4));
Round(d, e, a, b, c, f1(e, a, b), k1, w2 = ReadBE32(chunk + 8));
Round(c, d, e, a, b, f1(d, e, a), k1, w3 = ReadBE32(chunk + 12));
Round(b, c, d, e, a, f1(c, d, e), k1, w4 = ReadBE32(chunk + 16));
Round(a, b, c, d, e, f1(b, c, d), k1, w5 = ReadBE32(chunk + 20));
Round(e, a, b, c, d, f1(a, b, c), k1, w6 = ReadBE32(chunk + 24));
Round(d, e, a, b, c, f1(e, a, b), k1, w7 = ReadBE32(chunk + 28));
Round(c, d, e, a, b, f1(d, e, a), k1, w8 = ReadBE32(chunk + 32));
Round(b, c, d, e, a, f1(c, d, e), k1, w9 = ReadBE32(chunk + 36));
Round(a, b, c, d, e, f1(b, c, d), k1, w10 = ReadBE32(chunk + 40));
Round(e, a, b, c, d, f1(a, b, c), k1, w11 = ReadBE32(chunk + 44));
Round(d, e, a, b, c, f1(e, a, b), k1, w12 = ReadBE32(chunk + 48));
Round(c, d, e, a, b, f1(d, e, a), k1, w13 = ReadBE32(chunk + 52));
Round(b, c, d, e, a, f1(c, d, e), k1, w14 = ReadBE32(chunk + 56));
Round(a, b, c, d, e, f1(b, c, d), k1, w15 = ReadBE32(chunk + 60));
Round(e, a, b, c, d, f1(a, b, c), k1, w0 = left(w0 ^ w13 ^ w8 ^ w2));
Round(d, e, a, b, c, f1(e, a, b), k1, w1 = left(w1 ^ w14 ^ w9 ^ w3));
Round(c, d, e, a, b, f1(d, e, a), k1, w2 = left(w2 ^ w15 ^ w10 ^ w4));
Round(b, c, d, e, a, f1(c, d, e), k1, w3 = left(w3 ^ w0 ^ w11 ^ w5));
Round(a, b, c, d, e, f2(b, c, d), k2, w4 = left(w4 ^ w1 ^ w12 ^ w6));
Round(e, a, b, c, d, f2(a, b, c), k2, w5 = left(w5 ^ w2 ^ w13 ^ w7));
Round(d, e, a, b, c, f2(e, a, b), k2, w6 = left(w6 ^ w3 ^ w14 ^ w8));
Round(c, d, e, a, b, f2(d, e, a), k2, w7 = left(w7 ^ w4 ^ w15 ^ w9));
Round(b, c, d, e, a, f2(c, d, e), k2, w8 = left(w8 ^ w5 ^ w0 ^ w10));
Round(a, b, c, d, e, f2(b, c, d), k2, w9 = left(w9 ^ w6 ^ w1 ^ w11));
Round(e, a, b, c, d, f2(a, b, c), k2, w10 = left(w10 ^ w7 ^ w2 ^ w12));
Round(d, e, a, b, c, f2(e, a, b), k2, w11 = left(w11 ^ w8 ^ w3 ^ w13));
Round(c, d, e, a, b, f2(d, e, a), k2, w12 = left(w12 ^ w9 ^ w4 ^ w14));
Round(b, c, d, e, a, f2(c, d, e), k2, w13 = left(w13 ^ w10 ^ w5 ^ w15));
Round(a, b, c, d, e, f2(b, c, d), k2, w14 = left(w14 ^ w11 ^ w6 ^ w0));
Round(e, a, b, c, d, f2(a, b, c), k2, w15 = left(w15 ^ w12 ^ w7 ^ w1));
Round(d, e, a, b, c, f2(e, a, b), k2, w0 = left(w0 ^ w13 ^ w8 ^ w2));
Round(c, d, e, a, b, f2(d, e, a), k2, w1 = left(w1 ^ w14 ^ w9 ^ w3));
Round(b, c, d, e, a, f2(c, d, e), k2, w2 = left(w2 ^ w15 ^ w10 ^ w4));
Round(a, b, c, d, e, f2(b, c, d), k2, w3 = left(w3 ^ w0 ^ w11 ^ w5));
Round(e, a, b, c, d, f2(a, b, c), k2, w4 = left(w4 ^ w1 ^ w12 ^ w6));
Round(d, e, a, b, c, f2(e, a, b), k2, w5 = left(w5 ^ w2 ^ w13 ^ w7));
Round(c, d, e, a, b, f2(d, e, a), k2, w6 = left(w6 ^ w3 ^ w14 ^ w8));
Round(b, c, d, e, a, f2(c, d, e), k2, w7 = left(w7 ^ w4 ^ w15 ^ w9));
Round(a, b, c, d, e, f3(b, c, d), k3, w8 = left(w8 ^ w5 ^ w0 ^ w10));
Round(e, a, b, c, d, f3(a, b, c), k3, w9 = left(w9 ^ w6 ^ w1 ^ w11));
Round(d, e, a, b, c, f3(e, a, b), k3, w10 = left(w10 ^ w7 ^ w2 ^ w12));
Round(c, d, e, a, b, f3(d, e, a), k3, w11 = left(w11 ^ w8 ^ w3 ^ w13));
Round(b, c, d, e, a, f3(c, d, e), k3, w12 = left(w12 ^ w9 ^ w4 ^ w14));
Round(a, b, c, d, e, f3(b, c, d), k3, w13 = left(w13 ^ w10 ^ w5 ^ w15));
Round(e, a, b, c, d, f3(a, b, c), k3, w14 = left(w14 ^ w11 ^ w6 ^ w0));
Round(d, e, a, b, c, f3(e, a, b), k3, w15 = left(w15 ^ w12 ^ w7 ^ w1));
Round(c, d, e, a, b, f3(d, e, a), k3, w0 = left(w0 ^ w13 ^ w8 ^ w2));
Round(b, c, d, e, a, f3(c, d, e), k3, w1 = left(w1 ^ w14 ^ w9 ^ w3));
Round(a, b, c, d, e, f3(b, c, d), k3, w2 = left(w2 ^ w15 ^ w10 ^ w4));
Round(e, a, b, c, d, f3(a, b, c), k3, w3 = left(w3 ^ w0 ^ w11 ^ w5));
Round(d, e, a, b, c, f3(e, a, b), k3, w4 = left(w4 ^ w1 ^ w12 ^ w6));
Round(c, d, e, a, b, f3(d, e, a), k3, w5 = left(w5 ^ w2 ^ w13 ^ w7));
Round(b, c, d, e, a, f3(c, d, e), k3, w6 = left(w6 ^ w3 ^ w14 ^ w8));
Round(a, b, c, d, e, f3(b, c, d), k3, w7 = left(w7 ^ w4 ^ w15 ^ w9));
Round(e, a, b, c, d, f3(a, b, c), k3, w8 = left(w8 ^ w5 ^ w0 ^ w10));
Round(d, e, a, b, c, f3(e, a, b), k3, w9 = left(w9 ^ w6 ^ w1 ^ w11));
Round(c, d, e, a, b, f3(d, e, a), k3, w10 = left(w10 ^ w7 ^ w2 ^ w12));
Round(b, c, d, e, a, f3(c, d, e), k3, w11 = left(w11 ^ w8 ^ w3 ^ w13));
Round(a, b, c, d, e, f2(b, c, d), k4, w12 = left(w12 ^ w9 ^ w4 ^ w14));
Round(e, a, b, c, d, f2(a, b, c), k4, w13 = left(w13 ^ w10 ^ w5 ^ w15));
Round(d, e, a, b, c, f2(e, a, b), k4, w14 = left(w14 ^ w11 ^ w6 ^ w0));
Round(c, d, e, a, b, f2(d, e, a), k4, w15 = left(w15 ^ w12 ^ w7 ^ w1));
Round(b, c, d, e, a, f2(c, d, e), k4, w0 = left(w0 ^ w13 ^ w8 ^ w2));
Round(a, b, c, d, e, f2(b, c, d), k4, w1 = left(w1 ^ w14 ^ w9 ^ w3));
Round(e, a, b, c, d, f2(a, b, c), k4, w2 = left(w2 ^ w15 ^ w10 ^ w4));
Round(d, e, a, b, c, f2(e, a, b), k4, w3 = left(w3 ^ w0 ^ w11 ^ w5));
Round(c, d, e, a, b, f2(d, e, a), k4, w4 = left(w4 ^ w1 ^ w12 ^ w6));
Round(b, c, d, e, a, f2(c, d, e), k4, w5 = left(w5 ^ w2 ^ w13 ^ w7));
Round(a, b, c, d, e, f2(b, c, d), k4, w6 = left(w6 ^ w3 ^ w14 ^ w8));
Round(e, a, b, c, d, f2(a, b, c), k4, w7 = left(w7 ^ w4 ^ w15 ^ w9));
Round(d, e, a, b, c, f2(e, a, b), k4, w8 = left(w8 ^ w5 ^ w0 ^ w10));
Round(c, d, e, a, b, f2(d, e, a), k4, w9 = left(w9 ^ w6 ^ w1 ^ w11));
Round(b, c, d, e, a, f2(c, d, e), k4, w10 = left(w10 ^ w7 ^ w2 ^ w12));
Round(a, b, c, d, e, f2(b, c, d), k4, w11 = left(w11 ^ w8 ^ w3 ^ w13));
Round(e, a, b, c, d, f2(a, b, c), k4, w12 = left(w12 ^ w9 ^ w4 ^ w14));
Round(d, e, a, b, c, f2(e, a, b), k4, left(w13 ^ w10 ^ w5 ^ w15));
Round(c, d, e, a, b, f2(d, e, a), k4, left(w14 ^ w11 ^ w6 ^ w0));
Round(b, c, d, e, a, f2(c, d, e), k4, left(w15 ^ w12 ^ w7 ^ w1));
s[0] += a;
s[1] += b;
s[2] += c;
s[3] += d;
s[4] += e;
}
/** Define SHA1 hardware */
#if defined(__linux__)
#define HWCAP_SHA1 (1<<5)
#include <sys/auxv.h>
#elif defined(__WIN64__)
#include <intrin.h>
bool isAVX (void) {
int cpuinfo[4];
__cpuid(cpuinfo, 1);
return ((cpuinfo[2] & (1 << 28)) != 0);
}
#endif
/** Define a function pointer for Transform */
void (*transform_ptr) (uint32_t*, const unsigned char*) = &Transform;
/** Initialize the function pointer */
void inline Initialize_transform_ptr(void)
{
// Override the function pointer for ARMV8/AVX2
#if (defined(USE_ARMV8) || defined(USE_ARMV82))
if (getauxval(AT_HWCAP) && HWCAP_SHA1)
transform_ptr = &Transform_ARMV8;
#elif USE_AVX2 && defined(__linux__)
if (getauxval(AT_HWCAP) && HWCAP_SHA1)
transform_ptr = &Transform_AVX2;
#elif USE_AVX2 && defined(__WIN64__)
if (isAVX)
transform_ptr = &Transform_AVX2;
#endif
}
} // namespace sha1
} // namespace
////// SHA1
CSHA1::CSHA1() : bytes(0)
{
sha1::Initialize(s);
}
CSHA1& CSHA1::Write(const unsigned char* data, size_t len)
{
const unsigned char* end = data + len;
size_t bufsize = bytes % 64;
if (bufsize && bufsize + len >= 64) {
// Fill the buffer, and process it.
memcpy(buf + bufsize, data, 64 - bufsize);
bytes += 64 - bufsize;
data += 64 - bufsize;
sha1::transform_ptr(s, buf);
bufsize = 0;
}
while (end >= data + 64) {
// Process full chunks directly from the source.
sha1::transform_ptr(s, data);
bytes += 64;
data += 64;
}
if (end > data) {
// Fill the buffer with what remains.
memcpy(buf + bufsize, data, end - data);
bytes += end - data;
}
return *this;
}
void CSHA1::Finalize(unsigned char hash[OUTPUT_SIZE])
{
static const unsigned char pad[64] = {0x80};
unsigned char sizedesc[8];
WriteBE64(sizedesc, bytes << 3);
Write(pad, 1 + ((119 - (bytes % 64)) % 64));
Write(sizedesc, 8);
WriteBE32(hash, s[0]);
WriteBE32(hash + 4, s[1]);
WriteBE32(hash + 8, s[2]);
WriteBE32(hash + 12, s[3]);
WriteBE32(hash + 16, s[4]);
}
CSHA1& CSHA1::Reset()
{
bytes = 0;
sha1::Initialize(s);
return *this;
}
void detect_sha1_hardware()
{
sha1::Initialize_transform_ptr();
}
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