diff options
Diffstat (limited to 'kernel/crypto/rmd256.c')
| -rw-r--r-- | kernel/crypto/rmd256.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/kernel/crypto/rmd256.c b/kernel/crypto/rmd256.c new file mode 100644 index 000000000..4ec02a754 --- /dev/null +++ b/kernel/crypto/rmd256.c @@ -0,0 +1,349 @@ +/* + * Cryptographic API. + * + * RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest. + * + * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC + * + * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.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 <crypto/internal/hash.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/types.h> +#include <asm/byteorder.h> + +#include "ripemd.h" + +struct rmd256_ctx { + u64 byte_count; + u32 state[8]; + __le32 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)) + le32_to_cpup(&(x)) + (k); \ + (a) = rol32((a), (s)); \ +} + +static void rmd256_transform(u32 *state, const __le32 *in) +{ + u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp; + + /* Initialize left lane */ + aa = state[0]; + bb = state[1]; + cc = state[2]; + dd = state[3]; + + /* Initialize right lane */ + aaa = state[4]; + bbb = state[5]; + ccc = state[6]; + ddd = state[7]; + + /* 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 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); + + /* Swap contents of "a" registers */ + tmp = aa; aa = aaa; aaa = tmp; + + /* 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 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); + + /* Swap contents of "b" registers */ + tmp = bb; bb = bbb; bbb = tmp; + + /* 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 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); + + /* Swap contents of "c" registers */ + tmp = cc; cc = ccc; ccc = tmp; + + /* 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 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); + + /* Swap contents of "d" registers */ + tmp = dd; dd = ddd; ddd = tmp; + + /* combine results */ + state[0] += aa; + state[1] += bb; + state[2] += cc; + state[3] += dd; + state[4] += aaa; + state[5] += bbb; + state[6] += ccc; + state[7] += ddd; + + return; +} + +static int rmd256_init(struct shash_desc *desc) +{ + struct rmd256_ctx *rctx = shash_desc_ctx(desc); + + 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_H5; + rctx->state[5] = RMD_H6; + rctx->state[6] = RMD_H7; + rctx->state[7] = RMD_H8; + + memset(rctx->buffer, 0, sizeof(rctx->buffer)); + + return 0; +} + +static int rmd256_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct rmd256_ctx *rctx = shash_desc_ctx(desc); + 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); + goto out; + } + + memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), + data, avail); + + rmd256_transform(rctx->state, rctx->buffer); + data += avail; + len -= avail; + + while (len >= sizeof(rctx->buffer)) { + memcpy(rctx->buffer, data, sizeof(rctx->buffer)); + rmd256_transform(rctx->state, rctx->buffer); + data += sizeof(rctx->buffer); + len -= sizeof(rctx->buffer); + } + + memcpy(rctx->buffer, data, len); + +out: + return 0; +} + +/* Add padding and return the message digest. */ +static int rmd256_final(struct shash_desc *desc, u8 *out) +{ + struct rmd256_ctx *rctx = shash_desc_ctx(desc); + u32 i, index, padlen; + __le64 bits; + __le32 *dst = (__le32 *)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); + rmd256_update(desc, padding, padlen); + + /* Append length */ + rmd256_update(desc, (const u8 *)&bits, sizeof(bits)); + + /* Store state in digest */ + for (i = 0; i < 8; i++) + dst[i] = cpu_to_le32p(&rctx->state[i]); + + /* Wipe context */ + memset(rctx, 0, sizeof(*rctx)); + + return 0; +} + +static struct shash_alg alg = { + .digestsize = RMD256_DIGEST_SIZE, + .init = rmd256_init, + .update = rmd256_update, + .final = rmd256_final, + .descsize = sizeof(struct rmd256_ctx), + .base = { + .cra_name = "rmd256", + .cra_flags = CRYPTO_ALG_TYPE_SHASH, + .cra_blocksize = RMD256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int __init rmd256_mod_init(void) +{ + return crypto_register_shash(&alg); +} + +static void __exit rmd256_mod_fini(void) +{ + crypto_unregister_shash(&alg); +} + +module_init(rmd256_mod_init); +module_exit(rmd256_mod_fini); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>"); +MODULE_DESCRIPTION("RIPEMD-256 Message Digest"); +MODULE_ALIAS_CRYPTO("rmd256"); |