rmd160.c 12 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Cryptographic API.
  4. *
  5. * RIPEMD-160 - 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 rmd160_ctx {
  19. u64 byte_count;
  20. u32 state[5];
  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 K5 RMD_K5
  28. #define KK1 RMD_K6
  29. #define KK2 RMD_K7
  30. #define KK3 RMD_K8
  31. #define KK4 RMD_K9
  32. #define KK5 RMD_K1
  33. #define F1(x, y, z) (x ^ y ^ z) /* XOR */
  34. #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
  35. #define F3(x, y, z) ((x | ~y) ^ z)
  36. #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
  37. #define F5(x, y, z) (x ^ (y | ~z))
  38. #define ROUND(a, b, c, d, e, f, k, x, s) { \
  39. (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
  40. (a) = rol32((a), (s)) + (e); \
  41. (c) = rol32((c), 10); \
  42. }
  43. static void rmd160_transform(u32 *state, const __le32 *in)
  44. {
  45. u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
  46. /* Initialize left lane */
  47. aa = state[0];
  48. bb = state[1];
  49. cc = state[2];
  50. dd = state[3];
  51. ee = state[4];
  52. /* Initialize right lane */
  53. aaa = state[0];
  54. bbb = state[1];
  55. ccc = state[2];
  56. ddd = state[3];
  57. eee = state[4];
  58. /* round 1: left lane */
  59. ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11);
  60. ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14);
  61. ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15);
  62. ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12);
  63. ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5);
  64. ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8);
  65. ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7);
  66. ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9);
  67. ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11);
  68. ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13);
  69. ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
  70. ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
  71. ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6);
  72. ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7);
  73. ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9);
  74. ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8);
  75. /* round 2: left lane" */
  76. ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7);
  77. ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6);
  78. ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8);
  79. ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13);
  80. ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
  81. ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9);
  82. ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7);
  83. ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15);
  84. ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7);
  85. ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12);
  86. ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15);
  87. ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9);
  88. ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11);
  89. ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7);
  90. ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
  91. ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12);
  92. /* round 3: left lane" */
  93. ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11);
  94. ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
  95. ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6);
  96. ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7);
  97. ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14);
  98. ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9);
  99. ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13);
  100. ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15);
  101. ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14);
  102. ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8);
  103. ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13);
  104. ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6);
  105. ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5);
  106. ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
  107. ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7);
  108. ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5);
  109. /* round 4: left lane" */
  110. ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11);
  111. ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12);
  112. ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
  113. ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
  114. ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14);
  115. ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15);
  116. ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9);
  117. ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8);
  118. ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9);
  119. ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14);
  120. ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5);
  121. ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6);
  122. ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8);
  123. ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6);
  124. ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5);
  125. ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12);
  126. /* round 5: left lane" */
  127. ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9);
  128. ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15);
  129. ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5);
  130. ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11);
  131. ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6);
  132. ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8);
  133. ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13);
  134. ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
  135. ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5);
  136. ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12);
  137. ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13);
  138. ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14);
  139. ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
  140. ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8);
  141. ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5);
  142. ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6);
  143. /* round 1: right lane */
  144. ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8);
  145. ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9);
  146. ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9);
  147. ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11);
  148. ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13);
  149. ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15);
  150. ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
  151. ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5);
  152. ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7);
  153. ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7);
  154. ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8);
  155. ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11);
  156. ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14);
  157. ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
  158. ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12);
  159. ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6);
  160. /* round 2: right lane */
  161. ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9);
  162. ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
  163. ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15);
  164. ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7);
  165. ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12);
  166. ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8);
  167. ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9);
  168. ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
  169. ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7);
  170. ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7);
  171. ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12);
  172. ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7);
  173. ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6);
  174. ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15);
  175. ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13);
  176. ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11);
  177. /* round 3: right lane */
  178. ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9);
  179. ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7);
  180. ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15);
  181. ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11);
  182. ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8);
  183. ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6);
  184. ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6);
  185. ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14);
  186. ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
  187. ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13);
  188. ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5);
  189. ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14);
  190. ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
  191. ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13);
  192. ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7);
  193. ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5);
  194. /* round 4: right lane */
  195. ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15);
  196. ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5);
  197. ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8);
  198. ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11);
  199. ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14);
  200. ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
  201. ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6);
  202. ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14);
  203. ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6);
  204. ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9);
  205. ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12);
  206. ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9);
  207. ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12);
  208. ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5);
  209. ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
  210. ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8);
  211. /* round 5: right lane */
  212. ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8);
  213. ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5);
  214. ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
  215. ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9);
  216. ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12);
  217. ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5);
  218. ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14);
  219. ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6);
  220. ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8);
  221. ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13);
  222. ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6);
  223. ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5);
  224. ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15);
  225. ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13);
  226. ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11);
  227. ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
  228. /* combine results */
  229. ddd += cc + state[1]; /* final result for state[0] */
  230. state[1] = state[2] + dd + eee;
  231. state[2] = state[3] + ee + aaa;
  232. state[3] = state[4] + aa + bbb;
  233. state[4] = state[0] + bb + ccc;
  234. state[0] = ddd;
  235. }
  236. static int rmd160_init(struct shash_desc *desc)
  237. {
  238. struct rmd160_ctx *rctx = shash_desc_ctx(desc);
  239. rctx->byte_count = 0;
  240. rctx->state[0] = RMD_H0;
  241. rctx->state[1] = RMD_H1;
  242. rctx->state[2] = RMD_H2;
  243. rctx->state[3] = RMD_H3;
  244. rctx->state[4] = RMD_H4;
  245. memset(rctx->buffer, 0, sizeof(rctx->buffer));
  246. return 0;
  247. }
  248. static int rmd160_update(struct shash_desc *desc, const u8 *data,
  249. unsigned int len)
  250. {
  251. struct rmd160_ctx *rctx = shash_desc_ctx(desc);
  252. const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
  253. rctx->byte_count += len;
  254. /* Enough space in buffer? If so copy and we're done */
  255. if (avail > len) {
  256. memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  257. data, len);
  258. goto out;
  259. }
  260. memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  261. data, avail);
  262. rmd160_transform(rctx->state, rctx->buffer);
  263. data += avail;
  264. len -= avail;
  265. while (len >= sizeof(rctx->buffer)) {
  266. memcpy(rctx->buffer, data, sizeof(rctx->buffer));
  267. rmd160_transform(rctx->state, rctx->buffer);
  268. data += sizeof(rctx->buffer);
  269. len -= sizeof(rctx->buffer);
  270. }
  271. memcpy(rctx->buffer, data, len);
  272. out:
  273. return 0;
  274. }
  275. /* Add padding and return the message digest. */
  276. static int rmd160_final(struct shash_desc *desc, u8 *out)
  277. {
  278. struct rmd160_ctx *rctx = shash_desc_ctx(desc);
  279. u32 i, index, padlen;
  280. __le64 bits;
  281. __le32 *dst = (__le32 *)out;
  282. static const u8 padding[64] = { 0x80, };
  283. bits = cpu_to_le64(rctx->byte_count << 3);
  284. /* Pad out to 56 mod 64 */
  285. index = rctx->byte_count & 0x3f;
  286. padlen = (index < 56) ? (56 - index) : ((64+56) - index);
  287. rmd160_update(desc, padding, padlen);
  288. /* Append length */
  289. rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
  290. /* Store state in digest */
  291. for (i = 0; i < 5; i++)
  292. dst[i] = cpu_to_le32p(&rctx->state[i]);
  293. /* Wipe context */
  294. memset(rctx, 0, sizeof(*rctx));
  295. return 0;
  296. }
  297. static struct shash_alg alg = {
  298. .digestsize = RMD160_DIGEST_SIZE,
  299. .init = rmd160_init,
  300. .update = rmd160_update,
  301. .final = rmd160_final,
  302. .descsize = sizeof(struct rmd160_ctx),
  303. .base = {
  304. .cra_name = "rmd160",
  305. .cra_driver_name = "rmd160-generic",
  306. .cra_blocksize = RMD160_BLOCK_SIZE,
  307. .cra_module = THIS_MODULE,
  308. }
  309. };
  310. static int __init rmd160_mod_init(void)
  311. {
  312. return crypto_register_shash(&alg);
  313. }
  314. static void __exit rmd160_mod_fini(void)
  315. {
  316. crypto_unregister_shash(&alg);
  317. }
  318. subsys_initcall(rmd160_mod_init);
  319. module_exit(rmd160_mod_fini);
  320. MODULE_LICENSE("GPL");
  321. MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
  322. MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
  323. MODULE_ALIAS_CRYPTO("rmd160");