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sha512.cpp
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1/*******************************************************************************
2 * tlx/digest/sha512.cpp
3 *
4 * Public domain implementation of SHA-512 (SHA-2) processor. Copied from
5 * https://github.com/kalven/sha-2, which is based on LibTomCrypt.
6 *
7 * Part of tlx - http://panthema.net/tlx
8 *
9 * Copyright (C) 2018 Timo Bingmann <tb@panthema.net>
10 *
11 * All rights reserved. Published under the Boost Software License, Version 1.0
12 ******************************************************************************/
13
14#include <tlx/digest/sha512.hpp>
15
16#include <cstdint>
17#include <tlx/math/ror.hpp>
19
20namespace tlx {
21
22/*
23 * LibTomCrypt, modular cryptographic library -- Tom St Denis
24 *
25 * LibTomCrypt is a library that provides various cryptographic algorithms in a
26 * highly modular and flexible manner.
27 *
28 * The library is free for all purposes without any express guarantee it works.
29 */
30
31namespace digest_detail {
32
33static const std::uint64_t K[80] = {
34 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
35 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
36 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
37 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
38 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
39 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
40 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
41 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
42 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
43 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
44 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
45 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
46 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
47 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
48 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
49 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
50 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
51 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
52 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
53 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
54 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
55 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
56 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
57 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
58 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
59 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
60 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
61};
62
63static inline std::uint32_t min(std::uint32_t x, std::uint32_t y) {
64 return x < y ? x : y;
65}
66
67static inline void store64(std::uint64_t x, unsigned char* y) {
68 for (int i = 0; i != 8; ++i)
69 y[i] = (x >> ((7 - i) * 8)) & 255;
70}
71static inline std::uint64_t load64(const unsigned char* y) {
72 std::uint64_t res = 0;
73 for (int i = 0; i != 8; ++i)
74 res |= std::uint64_t(y[i]) << ((7 - i) * 8);
75 return res;
76}
77
78static inline
79std::uint64_t Ch(const std::uint64_t& x, const std::uint64_t& y, const std::uint64_t& z) {
80 return z ^ (x & (y ^ z));
81}
82static inline
83std::uint64_t Maj(const std::uint64_t& x, const std::uint64_t& y, const std::uint64_t& z) {
84 return ((x | y) & z) | (x & y);
85}
86static inline std::uint64_t Sh(std::uint64_t x, std::uint64_t n) {
87 return x >> n;
88}
89static inline std::uint64_t Sigma0(std::uint64_t x) {
90 return ror64(x, 28) ^ ror64(x, 34) ^ ror64(x, 39);
91}
92static inline std::uint64_t Sigma1(std::uint64_t x) {
93 return ror64(x, 14) ^ ror64(x, 18) ^ ror64(x, 41);
94}
95static inline std::uint64_t Gamma0(std::uint64_t x) {
96 return ror64(x, 1) ^ ror64(x, 8) ^ Sh(x, 7);
97}
98static inline std::uint64_t Gamma1(std::uint64_t x) {
99 return ror64(x, 19) ^ ror64(x, 61) ^ Sh(x, 6);
100}
101
102static void sha512_compress(std::uint64_t state[8], const std::uint8_t* buf) {
103 std::uint64_t S[8], W[80], t0, t1;
104
105 // Copy state_ into S
106 for (int i = 0; i < 8; i++)
107 S[i] = state[i];
108
109 // Copy the state into 1024-bits into W[0..15]
110 for (int i = 0; i < 16; i++)
111 W[i] = load64(buf + (8 * i));
112
113 // Fill W[16..79]
114 for (int i = 16; i < 80; i++)
115 W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
116
117 // Compress
118 auto RND =
119 [&](std::uint64_t a, std::uint64_t b, std::uint64_t c, std::uint64_t& d, std::uint64_t e,
120 std::uint64_t f, std::uint64_t g, std::uint64_t& h, std::uint64_t i)
121 {
122 t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i];
123 t1 = Sigma0(a) + Maj(a, b, c);
124 d += t0;
125 h = t0 + t1;
126 };
127
128 for (int i = 0; i < 80; i += 8)
129 {
130 RND(S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i + 0);
131 RND(S[7], S[0], S[1], S[2], S[3], S[4], S[5], S[6], i + 1);
132 RND(S[6], S[7], S[0], S[1], S[2], S[3], S[4], S[5], i + 2);
133 RND(S[5], S[6], S[7], S[0], S[1], S[2], S[3], S[4], i + 3);
134 RND(S[4], S[5], S[6], S[7], S[0], S[1], S[2], S[3], i + 4);
135 RND(S[3], S[4], S[5], S[6], S[7], S[0], S[1], S[2], i + 5);
136 RND(S[2], S[3], S[4], S[5], S[6], S[7], S[0], S[1], i + 6);
137 RND(S[1], S[2], S[3], S[4], S[5], S[6], S[7], S[0], i + 7);
138 }
139
140 // Feedback
141 for (int i = 0; i < 8; i++)
142 state[i] = state[i] + S[i];
143}
144
145} // namespace digest_detail
146
148 curlen_ = 0;
149 length_ = 0;
150 state_[0] = 0x6a09e667f3bcc908ULL;
151 state_[1] = 0xbb67ae8584caa73bULL;
152 state_[2] = 0x3c6ef372fe94f82bULL;
153 state_[3] = 0xa54ff53a5f1d36f1ULL;
154 state_[4] = 0x510e527fade682d1ULL;
155 state_[5] = 0x9b05688c2b3e6c1fULL;
156 state_[6] = 0x1f83d9abfb41bd6bULL;
157 state_[7] = 0x5be0cd19137e2179ULL;
158}
159
160SHA512::SHA512(const void* data, std::uint32_t size) : SHA512() {
161 process(data, size);
162}
163
164SHA512::SHA512(const std::string& str) : SHA512() {
165 process(str);
166}
167
168void SHA512::process(const void* data, std::uint32_t size) {
169 const std::uint32_t block_size = sizeof(SHA512::buf_);
170 auto in = static_cast<const std::uint8_t*>(data);
171
172 while (size > 0)
173 {
174 if (curlen_ == 0 && size >= block_size)
175 {
177 length_ += block_size * 8;
178 in += block_size;
179 size -= block_size;
180 }
181 else
182 {
183 std::uint32_t n = digest_detail::min(size, (block_size - curlen_));
184 std::uint8_t* b = buf_ + curlen_;
185 for (const std::uint8_t* a = in; a != in + n; ++a, ++b) {
186 *b = *a;
187 }
188 curlen_ += n;
189 in += n;
190 size -= n;
191
192 if (curlen_ == block_size)
193 {
195 length_ += 8 * block_size;
196 curlen_ = 0;
197 }
198 }
199 }
200}
201
202void SHA512::process(const std::string& str) {
203 return process(str.data(), str.size());
204}
205
206void SHA512::finalize(void* digest) {
207 // Increase the length of the message
208 length_ += curlen_ * 8ULL;
209
210 // Append the '1' bit
211 buf_[curlen_++] = static_cast<std::uint8_t>(0x80);
212
213 // If the length is currently above 112 bytes we append zeros then compress.
214 // Then we can fall back to padding zeros and length encoding like normal.
215 if (curlen_ > 112)
216 {
217 while (curlen_ < 128)
218 buf_[curlen_++] = 0;
220 curlen_ = 0;
221 }
222
223 // Pad up to 120 bytes of zeroes
224 // note: that from 112 to 120 is the 64 MSB of the length. We assume that
225 // you won't hash 2^64 bits of data... :-)
226 while (curlen_ < 120)
227 buf_[curlen_++] = 0;
228
229 // Store length
232
233 // Copy output
234 for (int i = 0; i < 8; i++) {
236 state_[i], static_cast<std::uint8_t*>(digest) + (8 * i));
237 }
238}
239
240std::string SHA512::digest() {
241 std::string out(kDigestLength, '0');
242 finalize(const_cast<char*>(out.data()));
243 return out;
244}
245
246std::string SHA512::digest_hex() {
247 std::uint8_t digest[kDigestLength];
250}
251
253 std::uint8_t digest[kDigestLength];
256}
257
258std::string sha512_hex(const void* data, std::uint32_t size) {
259 return SHA512(data, size).digest_hex();
260}
261
262std::string sha512_hex(const std::string& str) {
263 return SHA512(str).digest_hex();
264}
265
266std::string sha512_hex_uc(const void* data, std::uint32_t size) {
267 return SHA512(data, size).digest_hex_uc();
268}
269
270std::string sha512_hex_uc(const std::string& str) {
271 return SHA512(str).digest_hex_uc();
272}
273
274} // namespace tlx
275
276/******************************************************************************/
SHA-512 processor without external dependencies.
Definition sha512.hpp:29
void finalize(void *digest)
finalize computation and output 64 byte (512 bit) digest
Definition sha512.cpp:206
std::string digest_hex()
finalize computation and return 64 byte (512 bit) digest hex encoded
Definition sha512.cpp:246
std::string digest()
finalize computation and return 64 byte (512 bit) digest
Definition sha512.cpp:240
std::uint64_t state_[8]
Definition sha512.hpp:58
std::string digest_hex_uc()
finalize computation and return 64 byte (512 bit) digest upper-case hex
Definition sha512.cpp:252
std::uint32_t curlen_
Definition sha512.hpp:59
static constexpr size_t kDigestLength
digest length in bytes
Definition sha512.hpp:44
void process(const void *data, std::uint32_t size)
process more data
Definition sha512.cpp:168
SHA512()
construct empty object.
Definition sha512.cpp:147
std::uint64_t length_
Definition sha512.hpp:57
std::uint8_t buf_[128]
Definition sha512.hpp:60
std::string sha512_hex_uc(const void *data, std::uint32_t size)
process data and return 64 byte (512 bit) digest upper-case hex encoded
Definition sha512.cpp:266
std::string sha512_hex(const void *data, std::uint32_t size)
process data and return 64 byte (512 bit) digest hex encoded
Definition sha512.cpp:258
static std::uint64_t ror64(const std::uint64_t &x, int i)
ror64 - generic
Definition ror.hpp:89
std::string hexdump_lc(const void *const data, size_t size)
Dump a (binary) string as a sequence of lowercase hexadecimal pairs.
Definition hexdump.cpp:96
std::string hexdump(const void *const data, size_t size)
Dump a (binary) string as a sequence of uppercase hexadecimal pairs.
Definition hexdump.cpp:22
static std::uint64_t Maj(const std::uint64_t &x, const std::uint64_t &y, const std::uint64_t &z)
Definition sha512.cpp:83
static std::uint64_t Sigma0(std::uint64_t x)
Definition sha512.cpp:89
static std::uint64_t Gamma0(std::uint64_t x)
Definition sha512.cpp:95
static void store64(std::uint64_t x, unsigned char *y)
Definition sha512.cpp:67
static std::uint32_t min(std::uint32_t x, std::uint32_t y)
Definition md5.cpp:33
static std::uint64_t Sigma1(std::uint64_t x)
Definition sha512.cpp:92
static std::uint64_t Sh(std::uint64_t x, std::uint64_t n)
Definition sha512.cpp:86
static void sha512_compress(std::uint64_t state[8], const std::uint8_t *buf)
Definition sha512.cpp:102
static const std::uint64_t K[80]
Definition sha512.cpp:33
static std::uint64_t load64(const unsigned char *y)
Definition sha512.cpp:71
static std::uint64_t Ch(const std::uint64_t &x, const std::uint64_t &y, const std::uint64_t &z)
Definition sha512.cpp:79
static std::uint64_t Gamma1(std::uint64_t x)
Definition sha512.cpp:98