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crypto/rmd160.c
12.6 KB
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/* * Cryptographic API. * * RIPEMD-160 - RACE Integrity Primitives Evaluation Message Digest. * * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC * |
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* Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch> |
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* * 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. * */ |
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#include <crypto/internal/hash.h> |
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#include <linux/init.h> #include <linux/module.h> #include <linux/mm.h> |
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#include <linux/types.h>
#include <asm/byteorder.h>
#include "ripemd.h"
struct rmd160_ctx {
u64 byte_count;
u32 state[5];
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__le32 buffer[16]; |
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}; |
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#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 |
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#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) { \
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(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ |
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(a) = rol32((a), (s)) + (e); \ (c) = rol32((c), 10); \ } |
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static void rmd160_transform(u32 *state, const __le32 *in) |
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{
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;
}
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static int rmd160_init(struct shash_desc *desc) |
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{
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struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
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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)); |
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return 0; |
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} |
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static int rmd160_update(struct shash_desc *desc, const u8 *data, unsigned int len) |
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{
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struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
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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);
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goto out; |
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} memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), data, avail); |
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rmd160_transform(rctx->state, rctx->buffer); |
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data += avail;
len -= avail;
while (len >= sizeof(rctx->buffer)) {
memcpy(rctx->buffer, data, sizeof(rctx->buffer));
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rmd160_transform(rctx->state, rctx->buffer); |
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data += sizeof(rctx->buffer); len -= sizeof(rctx->buffer); } memcpy(rctx->buffer, data, len); |
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out: return 0; |
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} /* Add padding and return the message digest. */ |
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static int rmd160_final(struct shash_desc *desc, u8 *out) |
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{
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struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
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u32 i, index, padlen; |
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__le64 bits; __le32 *dst = (__le32 *)out; |
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static const u8 padding[64] = { 0x80, };
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bits = cpu_to_le64(rctx->byte_count << 3); |
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/* Pad out to 56 mod 64 */ index = rctx->byte_count & 0x3f; padlen = (index < 56) ? (56 - index) : ((64+56) - index); |
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rmd160_update(desc, padding, padlen); |
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/* Append length */ |
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rmd160_update(desc, (const u8 *)&bits, sizeof(bits)); |
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/* Store state in digest */ |
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for (i = 0; i < 5; i++) |
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dst[i] = cpu_to_le32p(&rctx->state[i]); |
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/* Wipe context */ memset(rctx, 0, sizeof(*rctx)); |
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return 0; |
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} |
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static struct shash_alg alg = {
.digestsize = RMD160_DIGEST_SIZE,
.init = rmd160_init,
.update = rmd160_update,
.final = rmd160_final,
.descsize = sizeof(struct rmd160_ctx),
.base = {
.cra_name = "rmd160",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = RMD160_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
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};
static int __init rmd160_mod_init(void)
{
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return crypto_register_shash(&alg); |
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}
static void __exit rmd160_mod_fini(void)
{
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crypto_unregister_shash(&alg); |
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}
module_init(rmd160_mod_init);
module_exit(rmd160_mod_fini);
MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
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MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
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