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utils-std

Collection of commonly available Unix tools git clone https://anongit.hacktivis.me/git/utils-std.git

sha512.c (5256B)


  1. // SPDX-FileCopyrightText: public domain sha512 implementation based on fips180-3
  2. // SPDX-License-Identifier: 0BSD
  3. #include "sha512.h"
  4. #include <ctype.h>
  5. #include <stdint.h>
  6. #include <stdio.h>
  7. #include <stdlib.h>
  8. #include <string.h>
  9. static uint64_t
  10. ror(uint64_t n, int k)
  11. {
  12. return (n >> k) | (n << (64 - k));
  13. }
  14. #define Ch(x, y, z) (z ^ (x & (y ^ z)))
  15. #define Maj(x, y, z) ((x & y) | (z & (x | y)))
  16. #define S0(x) (ror(x, 28) ^ ror(x, 34) ^ ror(x, 39))
  17. #define S1(x) (ror(x, 14) ^ ror(x, 18) ^ ror(x, 41))
  18. #define R0(x) (ror(x, 1) ^ ror(x, 8) ^ (x >> 7))
  19. #define R1(x) (ror(x, 19) ^ ror(x, 61) ^ (x >> 6))
  20. static const uint64_t K[80] = {
  21. 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
  22. 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
  23. 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  24. 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
  25. 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
  26. 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  27. 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
  28. 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
  29. 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  30. 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
  31. 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
  32. 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  33. 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
  34. 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
  35. 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  36. 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
  37. 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
  38. 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  39. 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
  40. 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
  41. static void
  42. processblock(struct sha512 *s, const uint8_t *buf)
  43. {
  44. uint64_t W[80], t1, t2, a, b, c, d, e, f, g, h;
  45. int i;
  46. for(i = 0; i < 16; i++)
  47. {
  48. W[i] = (uint64_t)buf[8 * i] << 56;
  49. W[i] |= (uint64_t)buf[8 * i + 1] << 48;
  50. W[i] |= (uint64_t)buf[8 * i + 2] << 40;
  51. W[i] |= (uint64_t)buf[8 * i + 3] << 32;
  52. W[i] |= (uint64_t)buf[8 * i + 4] << 24;
  53. W[i] |= (uint64_t)buf[8 * i + 5] << 16;
  54. W[i] |= (uint64_t)buf[8 * i + 6] << 8;
  55. W[i] |= buf[8 * i + 7];
  56. }
  57. for(; i < 80; i++)
  58. W[i] = R1(W[i - 2]) + W[i - 7] + R0(W[i - 15]) + W[i - 16];
  59. a = s->h[0];
  60. b = s->h[1];
  61. c = s->h[2];
  62. d = s->h[3];
  63. e = s->h[4];
  64. f = s->h[5];
  65. g = s->h[6];
  66. h = s->h[7];
  67. for(i = 0; i < 80; i++)
  68. {
  69. t1 = h + S1(e) + Ch(e, f, g) + K[i] + W[i];
  70. t2 = S0(a) + Maj(a, b, c);
  71. h = g;
  72. g = f;
  73. f = e;
  74. e = d + t1;
  75. d = c;
  76. c = b;
  77. b = a;
  78. a = t1 + t2;
  79. }
  80. s->h[0] += a;
  81. s->h[1] += b;
  82. s->h[2] += c;
  83. s->h[3] += d;
  84. s->h[4] += e;
  85. s->h[5] += f;
  86. s->h[6] += g;
  87. s->h[7] += h;
  88. }
  89. static void
  90. pad(struct sha512 *s)
  91. {
  92. unsigned r = s->len % 128;
  93. s->buf[r++] = 0x80;
  94. if(r > 112)
  95. {
  96. memset(s->buf + r, 0, 128 - r);
  97. r = 0;
  98. processblock(s, s->buf);
  99. }
  100. memset(s->buf + r, 0, 120 - r);
  101. s->len *= 8;
  102. s->buf[120] = s->len >> 56;
  103. s->buf[121] = s->len >> 48;
  104. s->buf[122] = s->len >> 40;
  105. s->buf[123] = s->len >> 32;
  106. s->buf[124] = s->len >> 24;
  107. s->buf[125] = s->len >> 16;
  108. s->buf[126] = s->len >> 8;
  109. s->buf[127] = s->len;
  110. processblock(s, s->buf);
  111. }
  112. void
  113. sha512_init(void *ctx)
  114. {
  115. struct sha512 *s = ctx;
  116. s->len = 0;
  117. s->h[0] = 0x6a09e667f3bcc908ULL;
  118. s->h[1] = 0xbb67ae8584caa73bULL;
  119. s->h[2] = 0x3c6ef372fe94f82bULL;
  120. s->h[3] = 0xa54ff53a5f1d36f1ULL;
  121. s->h[4] = 0x510e527fade682d1ULL;
  122. s->h[5] = 0x9b05688c2b3e6c1fULL;
  123. s->h[6] = 0x1f83d9abfb41bd6bULL;
  124. s->h[7] = 0x5be0cd19137e2179ULL;
  125. }
  126. void
  127. sha512_sum_n(void *ctx, uint8_t *md, int n)
  128. {
  129. struct sha512 *s = ctx;
  130. int i;
  131. pad(s);
  132. for(i = 0; i < n; i++)
  133. {
  134. md[8 * i] = s->h[i] >> 56;
  135. md[8 * i + 1] = s->h[i] >> 48;
  136. md[8 * i + 2] = s->h[i] >> 40;
  137. md[8 * i + 3] = s->h[i] >> 32;
  138. md[8 * i + 4] = s->h[i] >> 24;
  139. md[8 * i + 5] = s->h[i] >> 16;
  140. md[8 * i + 6] = s->h[i] >> 8;
  141. md[8 * i + 7] = s->h[i];
  142. }
  143. }
  144. void
  145. sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH])
  146. {
  147. sha512_sum_n(ctx, md, 8);
  148. }
  149. void
  150. sha512_update(void *ctx, const void *m, unsigned long len)
  151. {
  152. struct sha512 *s = ctx;
  153. const uint8_t *p = m;
  154. unsigned r = s->len % 128;
  155. s->len += len;
  156. if(r)
  157. {
  158. if(len < 128 - r)
  159. {
  160. memcpy(s->buf + r, p, len);
  161. return;
  162. }
  163. memcpy(s->buf + r, p, 128 - r);
  164. len -= 128 - r;
  165. p += 128 - r;
  166. processblock(s, s->buf);
  167. }
  168. for(; len >= 128; len -= 128, p += 128)
  169. processblock(s, p);
  170. memcpy(s->buf, p, len);
  171. }