/* * Cryptographic API. * * RIPEMD-128 - 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 rmd128_ctx { u64 byte_count; u32 state[4]; u32 buffer[16]; }; #define K1 RMD_K1 #define K2 RMD_K2 #define K3 RMD_K3 #define K4 RMD_K4 #define KK1 RMD_K6 #define KK2 RMD_K7 #define KK3 RMD_K8 #define KK4 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 ROUND(a, b, c, d, f, k, x, s) { \ (a) += f((b), (c), (d)) + (x) + (k); \ (a) = rol32((a), (s)); \ } static void rmd128_transform(u32 *state, u32 const *in) { u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd; /* Initialize left lane */ aa = state[0]; bb = state[1]; cc = state[2]; dd = state[3]; /* Initialize right lane */ aaa = state[0]; bbb = state[1]; ccc = state[2]; ddd = state[3]; /* round 1: left lane */ ROUND(aa, bb, cc, dd, F1, K1, in[0], 11); ROUND(dd, aa, bb, cc, F1, K1, in[1], 14); ROUND(cc, dd, aa, bb, F1, K1, in[2], 15); ROUND(bb, cc, dd, aa, F1, K1, in[3], 12); ROUND(aa, bb, cc, dd, F1, K1, in[4], 5); ROUND(dd, aa, bb, cc, F1, K1, in[5], 8); ROUND(cc, dd, aa, bb, F1, K1, in[6], 7); ROUND(bb, cc, dd, aa, F1, K1, in[7], 9); ROUND(aa, bb, cc, dd, F1, K1, in[8], 11); ROUND(dd, aa, bb, cc, F1, K1, in[9], 13); ROUND(cc, dd, aa, bb, F1, K1, in[10], 14); ROUND(bb, cc, dd, aa, F1, K1, in[11], 15); ROUND(aa, bb, cc, dd, F1, K1, in[12], 6); ROUND(dd, aa, bb, cc, F1, K1, in[13], 7); ROUND(cc, dd, aa, bb, F1, K1, in[14], 9); ROUND(bb, cc, dd, aa, F1, K1, in[15], 8); /* round 2: left lane */ ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); /* round 3: left lane */ ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); /* round 4: left lane */ ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); /* round 1: right lane */ ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); /* round 2: right lane */ ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); /* round 3: right lane */ ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); /* round 4: right lane */ ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); /* combine results */ ddd += cc + state[1]; /* final result for state[0] */ state[1] = state[2] + dd + aaa; state[2] = state[3] + aa + bbb; state[3] = state[0] + bb + ccc; state[0] = ddd; return; } static inline void le32_to_cpu_array(u32 *buf, unsigned int words) { while (words--) { le32_to_cpus(buf); buf++; } } static inline void cpu_to_le32_array(u32 *buf, unsigned int words) { while (words--) { cpu_to_le32s(buf); buf++; } } static inline void rmd128_transform_helper(struct rmd128_ctx *ctx) { le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32)); rmd128_transform(ctx->state, ctx->buffer); } static void rmd128_init(struct crypto_tfm *tfm) { struct rmd128_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; memset(rctx->buffer, 0, sizeof(rctx->buffer)); } static void rmd128_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) { struct rmd128_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); rmd128_transform_helper(rctx); data += avail; len -= avail; while (len >= sizeof(rctx->buffer)) { memcpy(rctx->buffer, data, sizeof(rctx->buffer)); rmd128_transform_helper(rctx); data += sizeof(rctx->buffer); len -= sizeof(rctx->buffer); } memcpy(rctx->buffer, data, len); } /* Add padding and return the message digest. */ static void rmd128_final(struct crypto_tfm *tfm, u8 *out) { struct rmd128_ctx *rctx = crypto_tfm_ctx(tfm); u32 index, padlen; u64 bits; static const u8 padding[64] = { 0x80, }; bits = rctx->byte_count << 3; /* Pad out to 56 mod 64 */ index = rctx->byte_count & 0x3f; padlen = (index < 56) ? (56 - index) : ((64+56) - index); rmd128_update(tfm, padding, padlen); /* Append length */ rmd128_update(tfm, (const u8 *)&bits, sizeof(bits)); /* Store state in digest */ memcpy(out, rctx->state, sizeof(rctx->state)); /* Wipe context */ memset(rctx, 0, sizeof(*rctx)); } static struct crypto_alg alg = { .cra_name = "rmd128", .cra_driver_name = "rmd128", .cra_flags = CRYPTO_ALG_TYPE_DIGEST, .cra_blocksize = RMD128_BLOCK_SIZE, .cra_ctxsize = sizeof(struct rmd128_ctx), .cra_module = THIS_MODULE, .cra_list = LIST_HEAD_INIT(alg.cra_list), .cra_u = { .digest = { .dia_digestsize = RMD128_DIGEST_SIZE, .dia_init = rmd128_init, .dia_update = rmd128_update, .dia_final = rmd128_final } } }; static int __init rmd128_mod_init(void) { return crypto_register_alg(&alg); } static void __exit rmd128_mod_fini(void) { crypto_unregister_alg(&alg); } module_init(rmd128_mod_init); module_exit(rmd128_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("RIPEMD-128 Message Digest"); MODULE_ALIAS("rmd128");