rmd128.c 10 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Cryptographic API.
  4. *
  5. * RIPEMD-128 - RACE Integrity Primitives Evaluation Message Digest.
  6. *
  7. * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
  8. *
  9. * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
  10. */
  11. #include <crypto/internal/hash.h>
  12. #include <linux/init.h>
  13. #include <linux/module.h>
  14. #include <linux/mm.h>
  15. #include <linux/types.h>
  16. #include <asm/byteorder.h>
  17. #include "ripemd.h"
  18. struct rmd128_ctx {
  19. u64 byte_count;
  20. u32 state[4];
  21. __le32 buffer[16];
  22. };
  23. #define K1 RMD_K1
  24. #define K2 RMD_K2
  25. #define K3 RMD_K3
  26. #define K4 RMD_K4
  27. #define KK1 RMD_K6
  28. #define KK2 RMD_K7
  29. #define KK3 RMD_K8
  30. #define KK4 RMD_K1
  31. #define F1(x, y, z) (x ^ y ^ z) /* XOR */
  32. #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
  33. #define F3(x, y, z) ((x | ~y) ^ z)
  34. #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
  35. #define ROUND(a, b, c, d, f, k, x, s) { \
  36. (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
  37. (a) = rol32((a), (s)); \
  38. }
  39. static void rmd128_transform(u32 *state, const __le32 *in)
  40. {
  41. u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;
  42. /* Initialize left lane */
  43. aa = state[0];
  44. bb = state[1];
  45. cc = state[2];
  46. dd = state[3];
  47. /* Initialize right lane */
  48. aaa = state[0];
  49. bbb = state[1];
  50. ccc = state[2];
  51. ddd = state[3];
  52. /* round 1: left lane */
  53. ROUND(aa, bb, cc, dd, F1, K1, in[0], 11);
  54. ROUND(dd, aa, bb, cc, F1, K1, in[1], 14);
  55. ROUND(cc, dd, aa, bb, F1, K1, in[2], 15);
  56. ROUND(bb, cc, dd, aa, F1, K1, in[3], 12);
  57. ROUND(aa, bb, cc, dd, F1, K1, in[4], 5);
  58. ROUND(dd, aa, bb, cc, F1, K1, in[5], 8);
  59. ROUND(cc, dd, aa, bb, F1, K1, in[6], 7);
  60. ROUND(bb, cc, dd, aa, F1, K1, in[7], 9);
  61. ROUND(aa, bb, cc, dd, F1, K1, in[8], 11);
  62. ROUND(dd, aa, bb, cc, F1, K1, in[9], 13);
  63. ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
  64. ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
  65. ROUND(aa, bb, cc, dd, F1, K1, in[12], 6);
  66. ROUND(dd, aa, bb, cc, F1, K1, in[13], 7);
  67. ROUND(cc, dd, aa, bb, F1, K1, in[14], 9);
  68. ROUND(bb, cc, dd, aa, F1, K1, in[15], 8);
  69. /* round 2: left lane */
  70. ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
  71. ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
  72. ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
  73. ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
  74. ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
  75. ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
  76. ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
  77. ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
  78. ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
  79. ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
  80. ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
  81. ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
  82. ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
  83. ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
  84. ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
  85. ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
  86. /* round 3: left lane */
  87. ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
  88. ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
  89. ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
  90. ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
  91. ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
  92. ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
  93. ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
  94. ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
  95. ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
  96. ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
  97. ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
  98. ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
  99. ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
  100. ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
  101. ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
  102. ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
  103. /* round 4: left lane */
  104. ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
  105. ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
  106. ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
  107. ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
  108. ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
  109. ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
  110. ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
  111. ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
  112. ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
  113. ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
  114. ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
  115. ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
  116. ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
  117. ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
  118. ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
  119. ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
  120. /* round 1: right lane */
  121. ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
  122. ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
  123. ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
  124. ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
  125. ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
  126. ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
  127. ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
  128. ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
  129. ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
  130. ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
  131. ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
  132. ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
  133. ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
  134. ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
  135. ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
  136. ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
  137. /* round 2: right lane */
  138. ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
  139. ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
  140. ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
  141. ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
  142. ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
  143. ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
  144. ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
  145. ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
  146. ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
  147. ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
  148. ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
  149. ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
  150. ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
  151. ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
  152. ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
  153. ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
  154. /* round 3: right lane */
  155. ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
  156. ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
  157. ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
  158. ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
  159. ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
  160. ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
  161. ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
  162. ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
  163. ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
  164. ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
  165. ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
  166. ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
  167. ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
  168. ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
  169. ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
  170. ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
  171. /* round 4: right lane */
  172. ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
  173. ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
  174. ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
  175. ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
  176. ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
  177. ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
  178. ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
  179. ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
  180. ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
  181. ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
  182. ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
  183. ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
  184. ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
  185. ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
  186. ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
  187. ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
  188. /* combine results */
  189. ddd += cc + state[1]; /* final result for state[0] */
  190. state[1] = state[2] + dd + aaa;
  191. state[2] = state[3] + aa + bbb;
  192. state[3] = state[0] + bb + ccc;
  193. state[0] = ddd;
  194. }
  195. static int rmd128_init(struct shash_desc *desc)
  196. {
  197. struct rmd128_ctx *rctx = shash_desc_ctx(desc);
  198. rctx->byte_count = 0;
  199. rctx->state[0] = RMD_H0;
  200. rctx->state[1] = RMD_H1;
  201. rctx->state[2] = RMD_H2;
  202. rctx->state[3] = RMD_H3;
  203. memset(rctx->buffer, 0, sizeof(rctx->buffer));
  204. return 0;
  205. }
  206. static int rmd128_update(struct shash_desc *desc, const u8 *data,
  207. unsigned int len)
  208. {
  209. struct rmd128_ctx *rctx = shash_desc_ctx(desc);
  210. const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
  211. rctx->byte_count += len;
  212. /* Enough space in buffer? If so copy and we're done */
  213. if (avail > len) {
  214. memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  215. data, len);
  216. goto out;
  217. }
  218. memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  219. data, avail);
  220. rmd128_transform(rctx->state, rctx->buffer);
  221. data += avail;
  222. len -= avail;
  223. while (len >= sizeof(rctx->buffer)) {
  224. memcpy(rctx->buffer, data, sizeof(rctx->buffer));
  225. rmd128_transform(rctx->state, rctx->buffer);
  226. data += sizeof(rctx->buffer);
  227. len -= sizeof(rctx->buffer);
  228. }
  229. memcpy(rctx->buffer, data, len);
  230. out:
  231. return 0;
  232. }
  233. /* Add padding and return the message digest. */
  234. static int rmd128_final(struct shash_desc *desc, u8 *out)
  235. {
  236. struct rmd128_ctx *rctx = shash_desc_ctx(desc);
  237. u32 i, index, padlen;
  238. __le64 bits;
  239. __le32 *dst = (__le32 *)out;
  240. static const u8 padding[64] = { 0x80, };
  241. bits = cpu_to_le64(rctx->byte_count << 3);
  242. /* Pad out to 56 mod 64 */
  243. index = rctx->byte_count & 0x3f;
  244. padlen = (index < 56) ? (56 - index) : ((64+56) - index);
  245. rmd128_update(desc, padding, padlen);
  246. /* Append length */
  247. rmd128_update(desc, (const u8 *)&bits, sizeof(bits));
  248. /* Store state in digest */
  249. for (i = 0; i < 4; i++)
  250. dst[i] = cpu_to_le32p(&rctx->state[i]);
  251. /* Wipe context */
  252. memset(rctx, 0, sizeof(*rctx));
  253. return 0;
  254. }
  255. static struct shash_alg alg = {
  256. .digestsize = RMD128_DIGEST_SIZE,
  257. .init = rmd128_init,
  258. .update = rmd128_update,
  259. .final = rmd128_final,
  260. .descsize = sizeof(struct rmd128_ctx),
  261. .base = {
  262. .cra_name = "rmd128",
  263. .cra_driver_name = "rmd128-generic",
  264. .cra_blocksize = RMD128_BLOCK_SIZE,
  265. .cra_module = THIS_MODULE,
  266. }
  267. };
  268. static int __init rmd128_mod_init(void)
  269. {
  270. return crypto_register_shash(&alg);
  271. }
  272. static void __exit rmd128_mod_fini(void)
  273. {
  274. crypto_unregister_shash(&alg);
  275. }
  276. subsys_initcall(rmd128_mod_init);
  277. module_exit(rmd128_mod_fini);
  278. MODULE_LICENSE("GPL");
  279. MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
  280. MODULE_DESCRIPTION("RIPEMD-128 Message Digest");
  281. MODULE_ALIAS_CRYPTO("rmd128");