| /* |
| * Cryptographic API. |
| * |
| * RIPEMD-160 - RACE Integrity Primitives Evaluation Message Digest. |
| * |
| * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC |
| * |
| * Copyright (c) 2008 Adrian-Ken Rueegsegger <rueegsegger (at) swiss-it.ch> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| */ |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/mm.h> |
| #include <linux/crypto.h> |
| #include <linux/cryptohash.h> |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| |
| #include "ripemd.h" |
| |
| struct rmd160_ctx { |
| u64 byte_count; |
| u32 state[5]; |
| u32 buffer[16]; |
| }; |
| |
| #define K1 RMD_K1 |
| #define K2 RMD_K2 |
| #define K3 RMD_K3 |
| #define K4 RMD_K4 |
| #define K5 RMD_K5 |
| #define KK1 RMD_K6 |
| #define KK2 RMD_K7 |
| #define KK3 RMD_K8 |
| #define KK4 RMD_K9 |
| #define KK5 RMD_K1 |
| |
| #define F1(x, y, z) (x ^ y ^ z) /* XOR */ |
| #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ |
| #define F3(x, y, z) ((x | ~y) ^ z) |
| #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ |
| #define F5(x, y, z) (x ^ (y | ~z)) |
| |
| #define ROUND(a, b, c, d, e, f, k, x, s) { \ |
| (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ |
| (a) = rol32((a), (s)) + (e); \ |
| (c) = rol32((c), 10); \ |
| } |
| |
| static void rmd160_transform(u32 *state, u32 const *in) |
| { |
| u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee; |
| |
| /* Initialize left lane */ |
| aa = state[0]; |
| bb = state[1]; |
| cc = state[2]; |
| dd = state[3]; |
| ee = state[4]; |
| |
| /* Initialize right lane */ |
| aaa = state[0]; |
| bbb = state[1]; |
| ccc = state[2]; |
| ddd = state[3]; |
| eee = state[4]; |
| |
| /* round 1: left lane */ |
| ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11); |
| ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14); |
| ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15); |
| ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12); |
| ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5); |
| ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8); |
| ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7); |
| ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9); |
| ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11); |
| ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13); |
| ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14); |
| ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15); |
| ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6); |
| ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7); |
| ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9); |
| ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8); |
| |
| /* round 2: left lane" */ |
| ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7); |
| ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6); |
| ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8); |
| ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13); |
| ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11); |
| ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9); |
| ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7); |
| ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15); |
| ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7); |
| ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12); |
| ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15); |
| ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9); |
| ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11); |
| ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7); |
| ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13); |
| ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12); |
| |
| /* round 3: left lane" */ |
| ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11); |
| ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13); |
| ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6); |
| ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7); |
| ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14); |
| ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9); |
| ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13); |
| ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15); |
| ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14); |
| ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8); |
| ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13); |
| ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6); |
| ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5); |
| ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12); |
| ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7); |
| ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5); |
| |
| /* round 4: left lane" */ |
| ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11); |
| ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12); |
| ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14); |
| ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15); |
| ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14); |
| ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15); |
| ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9); |
| ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8); |
| ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9); |
| ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14); |
| ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5); |
| ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6); |
| ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8); |
| ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6); |
| ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5); |
| ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12); |
| |
| /* round 5: left lane" */ |
| ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9); |
| ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15); |
| ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5); |
| ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11); |
| ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6); |
| ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8); |
| ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13); |
| ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12); |
| ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5); |
| ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12); |
| ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13); |
| ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14); |
| ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11); |
| ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8); |
| ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5); |
| ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6); |
| |
| /* round 1: right lane */ |
| ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8); |
| ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9); |
| ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9); |
| ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11); |
| ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13); |
| ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15); |
| ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15); |
| ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5); |
| ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7); |
| ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7); |
| ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8); |
| ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11); |
| ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14); |
| ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14); |
| ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12); |
| ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6); |
| |
| /* round 2: right lane */ |
| ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9); |
| ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13); |
| ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15); |
| ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7); |
| ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12); |
| ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8); |
| ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9); |
| ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11); |
| ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7); |
| ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7); |
| ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12); |
| ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7); |
| ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6); |
| ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15); |
| ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13); |
| ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11); |
| |
| /* round 3: right lane */ |
| ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9); |
| ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7); |
| ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15); |
| ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11); |
| ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8); |
| ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6); |
| ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6); |
| ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14); |
| ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12); |
| ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13); |
| ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5); |
| ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14); |
| ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13); |
| ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13); |
| ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7); |
| ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5); |
| |
| /* round 4: right lane */ |
| ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15); |
| ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5); |
| ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8); |
| ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11); |
| ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14); |
| ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14); |
| ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6); |
| ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14); |
| ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6); |
| ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9); |
| ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12); |
| ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9); |
| ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12); |
| ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5); |
| ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15); |
| ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8); |
| |
| /* round 5: right lane */ |
| ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8); |
| ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5); |
| ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12); |
| ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9); |
| ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12); |
| ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5); |
| ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14); |
| ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6); |
| ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8); |
| ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13); |
| ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6); |
| ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5); |
| ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15); |
| ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13); |
| ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11); |
| ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11); |
| |
| /* combine results */ |
| ddd += cc + state[1]; /* final result for state[0] */ |
| state[1] = state[2] + dd + eee; |
| state[2] = state[3] + ee + aaa; |
| state[3] = state[4] + aa + bbb; |
| state[4] = state[0] + bb + ccc; |
| state[0] = ddd; |
| |
| return; |
| } |
| |
| static void rmd160_init(struct crypto_tfm *tfm) |
| { |
| struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); |
| |
| rctx->byte_count = 0; |
| |
| rctx->state[0] = RMD_H0; |
| rctx->state[1] = RMD_H1; |
| rctx->state[2] = RMD_H2; |
| rctx->state[3] = RMD_H3; |
| rctx->state[4] = RMD_H4; |
| |
| memset(rctx->buffer, 0, sizeof(rctx->buffer)); |
| } |
| |
| static void rmd160_update(struct crypto_tfm *tfm, const u8 *data, |
| unsigned int len) |
| { |
| struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); |
| const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); |
| |
| rctx->byte_count += len; |
| |
| /* Enough space in buffer? If so copy and we're done */ |
| if (avail > len) { |
| memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
| data, len); |
| return; |
| } |
| |
| memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
| data, avail); |
| |
| rmd160_transform(rctx->state, rctx->buffer); |
| data += avail; |
| len -= avail; |
| |
| while (len >= sizeof(rctx->buffer)) { |
| memcpy(rctx->buffer, data, sizeof(rctx->buffer)); |
| rmd160_transform(rctx->state, rctx->buffer); |
| data += sizeof(rctx->buffer); |
| len -= sizeof(rctx->buffer); |
| } |
| |
| memcpy(rctx->buffer, data, len); |
| } |
| |
| /* Add padding and return the message digest. */ |
| static void rmd160_final(struct crypto_tfm *tfm, u8 *out) |
| { |
| struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); |
| u32 i, index, padlen; |
| u64 bits; |
| u32 *dst = (u32 *)out; |
| static const u8 padding[64] = { 0x80, }; |
| |
| bits = cpu_to_le64(rctx->byte_count << 3); |
| |
| /* Pad out to 56 mod 64 */ |
| index = rctx->byte_count & 0x3f; |
| padlen = (index < 56) ? (56 - index) : ((64+56) - index); |
| rmd160_update(tfm, padding, padlen); |
| |
| /* Append length */ |
| rmd160_update(tfm, (const u8 *)&bits, sizeof(bits)); |
| |
| /* Store state in digest */ |
| for (i = 0; i < 5; i++) |
| dst[i] = cpu_to_le32p(&rctx->state[i]); |
| |
| /* Wipe context */ |
| memset(rctx, 0, sizeof(*rctx)); |
| } |
| |
| static struct crypto_alg alg = { |
| .cra_name = "rmd160", |
| .cra_driver_name = "rmd160", |
| .cra_flags = CRYPTO_ALG_TYPE_DIGEST, |
| .cra_blocksize = RMD160_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct rmd160_ctx), |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(alg.cra_list), |
| .cra_u = { .digest = { |
| .dia_digestsize = RMD160_DIGEST_SIZE, |
| .dia_init = rmd160_init, |
| .dia_update = rmd160_update, |
| .dia_final = rmd160_final } } |
| }; |
| |
| static int __init rmd160_mod_init(void) |
| { |
| return crypto_register_alg(&alg); |
| } |
| |
| static void __exit rmd160_mod_fini(void) |
| { |
| crypto_unregister_alg(&alg); |
| } |
| |
| module_init(rmd160_mod_init); |
| module_exit(rmd160_mod_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("RIPEMD-160 Message Digest"); |
| |
| MODULE_ALIAS("rmd160"); |