1  // Copyright (c) 2014-2022 The Bitcoin Core developers
  2  // Distributed under the MIT software license, see the accompanying
  3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  4  
  5  #include <crypto/sha512.h>
  6  
  7  #include <crypto/common.h>
  8  
  9  #include <string.h>
 10  
 11  // Internal implementation code.
 12  namespace
 13  {
 14  /// Internal SHA-512 implementation.
 15  namespace sha512
 16  {
 17  uint64_t inline Ch(uint64_t x, uint64_t y, uint64_t z) { return z ^ (x & (y ^ z)); }
 18  uint64_t inline Maj(uint64_t x, uint64_t y, uint64_t z) { return (x & y) | (z & (x | y)); }
 19  uint64_t inline Sigma0(uint64_t x) { return (x >> 28 | x << 36) ^ (x >> 34 | x << 30) ^ (x >> 39 | x << 25); }
 20  uint64_t inline Sigma1(uint64_t x) { return (x >> 14 | x << 50) ^ (x >> 18 | x << 46) ^ (x >> 41 | x << 23); }
 21  uint64_t inline sigma0(uint64_t x) { return (x >> 1 | x << 63) ^ (x >> 8 | x << 56) ^ (x >> 7); }
 22  uint64_t inline sigma1(uint64_t x) { return (x >> 19 | x << 45) ^ (x >> 61 | x << 3) ^ (x >> 6); }
 23  
 24  /** One round of SHA-512. */
 25  void inline Round(uint64_t a, uint64_t b, uint64_t c, uint64_t& d, uint64_t e, uint64_t f, uint64_t g, uint64_t& h, uint64_t k, uint64_t w)
 26  {
 27      uint64_t t1 = h + Sigma1(e) + Ch(e, f, g) + k + w;
 28      uint64_t t2 = Sigma0(a) + Maj(a, b, c);
 29      d += t1;
 30      h = t1 + t2;
 31  }
 32  
 33  /** Initialize SHA-512 state. */
 34  void inline Initialize(uint64_t* s)
 35  {
 36      s[0] = 0x6a09e667f3bcc908ull;
 37      s[1] = 0xbb67ae8584caa73bull;
 38      s[2] = 0x3c6ef372fe94f82bull;
 39      s[3] = 0xa54ff53a5f1d36f1ull;
 40      s[4] = 0x510e527fade682d1ull;
 41      s[5] = 0x9b05688c2b3e6c1full;
 42      s[6] = 0x1f83d9abfb41bd6bull;
 43      s[7] = 0x5be0cd19137e2179ull;
 44  }
 45  
 46  /** Perform one SHA-512 transformation, processing a 128-byte chunk. */
 47  void Transform(uint64_t* s, const unsigned char* chunk)
 48  {
 49      uint64_t a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5], g = s[6], h = s[7];
 50      uint64_t w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
 51  
 52      Round(a, b, c, d, e, f, g, h, 0x428a2f98d728ae22ull, w0 = ReadBE64(chunk + 0));
 53      Round(h, a, b, c, d, e, f, g, 0x7137449123ef65cdull, w1 = ReadBE64(chunk + 8));
 54      Round(g, h, a, b, c, d, e, f, 0xb5c0fbcfec4d3b2full, w2 = ReadBE64(chunk + 16));
 55      Round(f, g, h, a, b, c, d, e, 0xe9b5dba58189dbbcull, w3 = ReadBE64(chunk + 24));
 56      Round(e, f, g, h, a, b, c, d, 0x3956c25bf348b538ull, w4 = ReadBE64(chunk + 32));
 57      Round(d, e, f, g, h, a, b, c, 0x59f111f1b605d019ull, w5 = ReadBE64(chunk + 40));
 58      Round(c, d, e, f, g, h, a, b, 0x923f82a4af194f9bull, w6 = ReadBE64(chunk + 48));
 59      Round(b, c, d, e, f, g, h, a, 0xab1c5ed5da6d8118ull, w7 = ReadBE64(chunk + 56));
 60      Round(a, b, c, d, e, f, g, h, 0xd807aa98a3030242ull, w8 = ReadBE64(chunk + 64));
 61      Round(h, a, b, c, d, e, f, g, 0x12835b0145706fbeull, w9 = ReadBE64(chunk + 72));
 62      Round(g, h, a, b, c, d, e, f, 0x243185be4ee4b28cull, w10 = ReadBE64(chunk + 80));
 63      Round(f, g, h, a, b, c, d, e, 0x550c7dc3d5ffb4e2ull, w11 = ReadBE64(chunk + 88));
 64      Round(e, f, g, h, a, b, c, d, 0x72be5d74f27b896full, w12 = ReadBE64(chunk + 96));
 65      Round(d, e, f, g, h, a, b, c, 0x80deb1fe3b1696b1ull, w13 = ReadBE64(chunk + 104));
 66      Round(c, d, e, f, g, h, a, b, 0x9bdc06a725c71235ull, w14 = ReadBE64(chunk + 112));
 67      Round(b, c, d, e, f, g, h, a, 0xc19bf174cf692694ull, w15 = ReadBE64(chunk + 120));
 68  
 69      Round(a, b, c, d, e, f, g, h, 0xe49b69c19ef14ad2ull, w0 += sigma1(w14) + w9 + sigma0(w1));
 70      Round(h, a, b, c, d, e, f, g, 0xefbe4786384f25e3ull, w1 += sigma1(w15) + w10 + sigma0(w2));
 71      Round(g, h, a, b, c, d, e, f, 0x0fc19dc68b8cd5b5ull, w2 += sigma1(w0) + w11 + sigma0(w3));
 72      Round(f, g, h, a, b, c, d, e, 0x240ca1cc77ac9c65ull, w3 += sigma1(w1) + w12 + sigma0(w4));
 73      Round(e, f, g, h, a, b, c, d, 0x2de92c6f592b0275ull, w4 += sigma1(w2) + w13 + sigma0(w5));
 74      Round(d, e, f, g, h, a, b, c, 0x4a7484aa6ea6e483ull, w5 += sigma1(w3) + w14 + sigma0(w6));
 75      Round(c, d, e, f, g, h, a, b, 0x5cb0a9dcbd41fbd4ull, w6 += sigma1(w4) + w15 + sigma0(w7));
 76      Round(b, c, d, e, f, g, h, a, 0x76f988da831153b5ull, w7 += sigma1(w5) + w0 + sigma0(w8));
 77      Round(a, b, c, d, e, f, g, h, 0x983e5152ee66dfabull, w8 += sigma1(w6) + w1 + sigma0(w9));
 78      Round(h, a, b, c, d, e, f, g, 0xa831c66d2db43210ull, w9 += sigma1(w7) + w2 + sigma0(w10));
 79      Round(g, h, a, b, c, d, e, f, 0xb00327c898fb213full, w10 += sigma1(w8) + w3 + sigma0(w11));
 80      Round(f, g, h, a, b, c, d, e, 0xbf597fc7beef0ee4ull, w11 += sigma1(w9) + w4 + sigma0(w12));
 81      Round(e, f, g, h, a, b, c, d, 0xc6e00bf33da88fc2ull, w12 += sigma1(w10) + w5 + sigma0(w13));
 82      Round(d, e, f, g, h, a, b, c, 0xd5a79147930aa725ull, w13 += sigma1(w11) + w6 + sigma0(w14));
 83      Round(c, d, e, f, g, h, a, b, 0x06ca6351e003826full, w14 += sigma1(w12) + w7 + sigma0(w15));
 84      Round(b, c, d, e, f, g, h, a, 0x142929670a0e6e70ull, w15 += sigma1(w13) + w8 + sigma0(w0));
 85  
 86      Round(a, b, c, d, e, f, g, h, 0x27b70a8546d22ffcull, w0 += sigma1(w14) + w9 + sigma0(w1));
 87      Round(h, a, b, c, d, e, f, g, 0x2e1b21385c26c926ull, w1 += sigma1(w15) + w10 + sigma0(w2));
 88      Round(g, h, a, b, c, d, e, f, 0x4d2c6dfc5ac42aedull, w2 += sigma1(w0) + w11 + sigma0(w3));
 89      Round(f, g, h, a, b, c, d, e, 0x53380d139d95b3dfull, w3 += sigma1(w1) + w12 + sigma0(w4));
 90      Round(e, f, g, h, a, b, c, d, 0x650a73548baf63deull, w4 += sigma1(w2) + w13 + sigma0(w5));
 91      Round(d, e, f, g, h, a, b, c, 0x766a0abb3c77b2a8ull, w5 += sigma1(w3) + w14 + sigma0(w6));
 92      Round(c, d, e, f, g, h, a, b, 0x81c2c92e47edaee6ull, w6 += sigma1(w4) + w15 + sigma0(w7));
 93      Round(b, c, d, e, f, g, h, a, 0x92722c851482353bull, w7 += sigma1(w5) + w0 + sigma0(w8));
 94      Round(a, b, c, d, e, f, g, h, 0xa2bfe8a14cf10364ull, w8 += sigma1(w6) + w1 + sigma0(w9));
 95      Round(h, a, b, c, d, e, f, g, 0xa81a664bbc423001ull, w9 += sigma1(w7) + w2 + sigma0(w10));
 96      Round(g, h, a, b, c, d, e, f, 0xc24b8b70d0f89791ull, w10 += sigma1(w8) + w3 + sigma0(w11));
 97      Round(f, g, h, a, b, c, d, e, 0xc76c51a30654be30ull, w11 += sigma1(w9) + w4 + sigma0(w12));
 98      Round(e, f, g, h, a, b, c, d, 0xd192e819d6ef5218ull, w12 += sigma1(w10) + w5 + sigma0(w13));
 99      Round(d, e, f, g, h, a, b, c, 0xd69906245565a910ull, w13 += sigma1(w11) + w6 + sigma0(w14));
100      Round(c, d, e, f, g, h, a, b, 0xf40e35855771202aull, w14 += sigma1(w12) + w7 + sigma0(w15));
101      Round(b, c, d, e, f, g, h, a, 0x106aa07032bbd1b8ull, w15 += sigma1(w13) + w8 + sigma0(w0));
102  
103      Round(a, b, c, d, e, f, g, h, 0x19a4c116b8d2d0c8ull, w0 += sigma1(w14) + w9 + sigma0(w1));
104      Round(h, a, b, c, d, e, f, g, 0x1e376c085141ab53ull, w1 += sigma1(w15) + w10 + sigma0(w2));
105      Round(g, h, a, b, c, d, e, f, 0x2748774cdf8eeb99ull, w2 += sigma1(w0) + w11 + sigma0(w3));
106      Round(f, g, h, a, b, c, d, e, 0x34b0bcb5e19b48a8ull, w3 += sigma1(w1) + w12 + sigma0(w4));
107      Round(e, f, g, h, a, b, c, d, 0x391c0cb3c5c95a63ull, w4 += sigma1(w2) + w13 + sigma0(w5));
108      Round(d, e, f, g, h, a, b, c, 0x4ed8aa4ae3418acbull, w5 += sigma1(w3) + w14 + sigma0(w6));
109      Round(c, d, e, f, g, h, a, b, 0x5b9cca4f7763e373ull, w6 += sigma1(w4) + w15 + sigma0(w7));
110      Round(b, c, d, e, f, g, h, a, 0x682e6ff3d6b2b8a3ull, w7 += sigma1(w5) + w0 + sigma0(w8));
111      Round(a, b, c, d, e, f, g, h, 0x748f82ee5defb2fcull, w8 += sigma1(w6) + w1 + sigma0(w9));
112      Round(h, a, b, c, d, e, f, g, 0x78a5636f43172f60ull, w9 += sigma1(w7) + w2 + sigma0(w10));
113      Round(g, h, a, b, c, d, e, f, 0x84c87814a1f0ab72ull, w10 += sigma1(w8) + w3 + sigma0(w11));
114      Round(f, g, h, a, b, c, d, e, 0x8cc702081a6439ecull, w11 += sigma1(w9) + w4 + sigma0(w12));
115      Round(e, f, g, h, a, b, c, d, 0x90befffa23631e28ull, w12 += sigma1(w10) + w5 + sigma0(w13));
116      Round(d, e, f, g, h, a, b, c, 0xa4506cebde82bde9ull, w13 += sigma1(w11) + w6 + sigma0(w14));
117      Round(c, d, e, f, g, h, a, b, 0xbef9a3f7b2c67915ull, w14 += sigma1(w12) + w7 + sigma0(w15));
118      Round(b, c, d, e, f, g, h, a, 0xc67178f2e372532bull, w15 += sigma1(w13) + w8 + sigma0(w0));
119  
120      Round(a, b, c, d, e, f, g, h, 0xca273eceea26619cull, w0 += sigma1(w14) + w9 + sigma0(w1));
121      Round(h, a, b, c, d, e, f, g, 0xd186b8c721c0c207ull, w1 += sigma1(w15) + w10 + sigma0(w2));
122      Round(g, h, a, b, c, d, e, f, 0xeada7dd6cde0eb1eull, w2 += sigma1(w0) + w11 + sigma0(w3));
123      Round(f, g, h, a, b, c, d, e, 0xf57d4f7fee6ed178ull, w3 += sigma1(w1) + w12 + sigma0(w4));
124      Round(e, f, g, h, a, b, c, d, 0x06f067aa72176fbaull, w4 += sigma1(w2) + w13 + sigma0(w5));
125      Round(d, e, f, g, h, a, b, c, 0x0a637dc5a2c898a6ull, w5 += sigma1(w3) + w14 + sigma0(w6));
126      Round(c, d, e, f, g, h, a, b, 0x113f9804bef90daeull, w6 += sigma1(w4) + w15 + sigma0(w7));
127      Round(b, c, d, e, f, g, h, a, 0x1b710b35131c471bull, w7 += sigma1(w5) + w0 + sigma0(w8));
128      Round(a, b, c, d, e, f, g, h, 0x28db77f523047d84ull, w8 += sigma1(w6) + w1 + sigma0(w9));
129      Round(h, a, b, c, d, e, f, g, 0x32caab7b40c72493ull, w9 += sigma1(w7) + w2 + sigma0(w10));
130      Round(g, h, a, b, c, d, e, f, 0x3c9ebe0a15c9bebcull, w10 += sigma1(w8) + w3 + sigma0(w11));
131      Round(f, g, h, a, b, c, d, e, 0x431d67c49c100d4cull, w11 += sigma1(w9) + w4 + sigma0(w12));
132      Round(e, f, g, h, a, b, c, d, 0x4cc5d4becb3e42b6ull, w12 += sigma1(w10) + w5 + sigma0(w13));
133      Round(d, e, f, g, h, a, b, c, 0x597f299cfc657e2aull, w13 += sigma1(w11) + w6 + sigma0(w14));
134      Round(c, d, e, f, g, h, a, b, 0x5fcb6fab3ad6faecull, w14 + sigma1(w12) + w7 + sigma0(w15));
135      Round(b, c, d, e, f, g, h, a, 0x6c44198c4a475817ull, w15 + sigma1(w13) + w8 + sigma0(w0));
136  
137      s[0] += a;
138      s[1] += b;
139      s[2] += c;
140      s[3] += d;
141      s[4] += e;
142      s[5] += f;
143      s[6] += g;
144      s[7] += h;
145  }
146  
147  } // namespace sha512
148  
149  } // namespace
150  
151  
152  ////// SHA-512
153  
154  CSHA512::CSHA512()
155  {
156      sha512::Initialize(s);
157  }
158  
159  CSHA512& CSHA512::Write(const unsigned char* data, size_t len)
160  {
161      const unsigned char* end = data + len;
162      size_t bufsize = bytes % 128;
163      if (bufsize && bufsize + len >= 128) {
164          // Fill the buffer, and process it.
165          memcpy(buf + bufsize, data, 128 - bufsize);
166          bytes += 128 - bufsize;
167          data += 128 - bufsize;
168          sha512::Transform(s, buf);
169          bufsize = 0;
170      }
171      while (end - data >= 128) {
172          // Process full chunks directly from the source.
173          sha512::Transform(s, data);
174          data += 128;
175          bytes += 128;
176      }
177      if (end > data) {
178          // Fill the buffer with what remains.
179          memcpy(buf + bufsize, data, end - data);
180          bytes += end - data;
181      }
182      return *this;
183  }
184  
185  void CSHA512::Finalize(unsigned char hash[OUTPUT_SIZE])
186  {
187      static const unsigned char pad[128] = {0x80};
188      unsigned char sizedesc[16] = {0x00};
189      WriteBE64(sizedesc + 8, bytes << 3);
190      Write(pad, 1 + ((239 - (bytes % 128)) % 128));
191      Write(sizedesc, 16);
192      WriteBE64(hash, s[0]);
193      WriteBE64(hash + 8, s[1]);
194      WriteBE64(hash + 16, s[2]);
195      WriteBE64(hash + 24, s[3]);
196      WriteBE64(hash + 32, s[4]);
197      WriteBE64(hash + 40, s[5]);
198      WriteBE64(hash + 48, s[6]);
199      WriteBE64(hash + 56, s[7]);
200  }
201  
202  CSHA512& CSHA512::Reset()
203  {
204      bytes = 0;
205      sha512::Initialize(s);
206      return *this;
207  }