mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Paul Gortmaker](/assets/img/avatar_default.png)
Part of the include cleanups means that the implicit inclusion of module.h via device.h is going away. So fix things up in advance. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
258 lines
6.2 KiB
C
258 lines
6.2 KiB
C
/*
|
|
* Cryptographic API.
|
|
*
|
|
* MD4 Message Digest Algorithm (RFC1320).
|
|
*
|
|
* Implementation derived from Andrew Tridgell and Steve French's
|
|
* CIFS MD4 implementation, and the cryptoapi implementation
|
|
* originally based on the public domain implementation written
|
|
* by Colin Plumb in 1993.
|
|
*
|
|
* Copyright (c) Andrew Tridgell 1997-1998.
|
|
* Modified by Steve French (sfrench@us.ibm.com) 2002
|
|
* Copyright (c) Cryptoapi developers.
|
|
* Copyright (c) 2002 David S. Miller (davem@redhat.com)
|
|
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/types.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#define MD4_DIGEST_SIZE 16
|
|
#define MD4_HMAC_BLOCK_SIZE 64
|
|
#define MD4_BLOCK_WORDS 16
|
|
#define MD4_HASH_WORDS 4
|
|
|
|
struct md4_ctx {
|
|
u32 hash[MD4_HASH_WORDS];
|
|
u32 block[MD4_BLOCK_WORDS];
|
|
u64 byte_count;
|
|
};
|
|
|
|
static inline u32 lshift(u32 x, unsigned int s)
|
|
{
|
|
x &= 0xFFFFFFFF;
|
|
return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
|
|
}
|
|
|
|
static inline u32 F(u32 x, u32 y, u32 z)
|
|
{
|
|
return (x & y) | ((~x) & z);
|
|
}
|
|
|
|
static inline u32 G(u32 x, u32 y, u32 z)
|
|
{
|
|
return (x & y) | (x & z) | (y & z);
|
|
}
|
|
|
|
static inline u32 H(u32 x, u32 y, u32 z)
|
|
{
|
|
return x ^ y ^ z;
|
|
}
|
|
|
|
#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
|
|
#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (u32)0x5A827999,s))
|
|
#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (u32)0x6ED9EBA1,s))
|
|
|
|
/* XXX: this stuff can be optimized */
|
|
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 void md4_transform(u32 *hash, u32 const *in)
|
|
{
|
|
u32 a, b, c, d;
|
|
|
|
a = hash[0];
|
|
b = hash[1];
|
|
c = hash[2];
|
|
d = hash[3];
|
|
|
|
ROUND1(a, b, c, d, in[0], 3);
|
|
ROUND1(d, a, b, c, in[1], 7);
|
|
ROUND1(c, d, a, b, in[2], 11);
|
|
ROUND1(b, c, d, a, in[3], 19);
|
|
ROUND1(a, b, c, d, in[4], 3);
|
|
ROUND1(d, a, b, c, in[5], 7);
|
|
ROUND1(c, d, a, b, in[6], 11);
|
|
ROUND1(b, c, d, a, in[7], 19);
|
|
ROUND1(a, b, c, d, in[8], 3);
|
|
ROUND1(d, a, b, c, in[9], 7);
|
|
ROUND1(c, d, a, b, in[10], 11);
|
|
ROUND1(b, c, d, a, in[11], 19);
|
|
ROUND1(a, b, c, d, in[12], 3);
|
|
ROUND1(d, a, b, c, in[13], 7);
|
|
ROUND1(c, d, a, b, in[14], 11);
|
|
ROUND1(b, c, d, a, in[15], 19);
|
|
|
|
ROUND2(a, b, c, d,in[ 0], 3);
|
|
ROUND2(d, a, b, c, in[4], 5);
|
|
ROUND2(c, d, a, b, in[8], 9);
|
|
ROUND2(b, c, d, a, in[12], 13);
|
|
ROUND2(a, b, c, d, in[1], 3);
|
|
ROUND2(d, a, b, c, in[5], 5);
|
|
ROUND2(c, d, a, b, in[9], 9);
|
|
ROUND2(b, c, d, a, in[13], 13);
|
|
ROUND2(a, b, c, d, in[2], 3);
|
|
ROUND2(d, a, b, c, in[6], 5);
|
|
ROUND2(c, d, a, b, in[10], 9);
|
|
ROUND2(b, c, d, a, in[14], 13);
|
|
ROUND2(a, b, c, d, in[3], 3);
|
|
ROUND2(d, a, b, c, in[7], 5);
|
|
ROUND2(c, d, a, b, in[11], 9);
|
|
ROUND2(b, c, d, a, in[15], 13);
|
|
|
|
ROUND3(a, b, c, d,in[ 0], 3);
|
|
ROUND3(d, a, b, c, in[8], 9);
|
|
ROUND3(c, d, a, b, in[4], 11);
|
|
ROUND3(b, c, d, a, in[12], 15);
|
|
ROUND3(a, b, c, d, in[2], 3);
|
|
ROUND3(d, a, b, c, in[10], 9);
|
|
ROUND3(c, d, a, b, in[6], 11);
|
|
ROUND3(b, c, d, a, in[14], 15);
|
|
ROUND3(a, b, c, d, in[1], 3);
|
|
ROUND3(d, a, b, c, in[9], 9);
|
|
ROUND3(c, d, a, b, in[5], 11);
|
|
ROUND3(b, c, d, a, in[13], 15);
|
|
ROUND3(a, b, c, d, in[3], 3);
|
|
ROUND3(d, a, b, c, in[11], 9);
|
|
ROUND3(c, d, a, b, in[7], 11);
|
|
ROUND3(b, c, d, a, in[15], 15);
|
|
|
|
hash[0] += a;
|
|
hash[1] += b;
|
|
hash[2] += c;
|
|
hash[3] += d;
|
|
}
|
|
|
|
static inline void md4_transform_helper(struct md4_ctx *ctx)
|
|
{
|
|
le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block));
|
|
md4_transform(ctx->hash, ctx->block);
|
|
}
|
|
|
|
static int md4_init(struct shash_desc *desc)
|
|
{
|
|
struct md4_ctx *mctx = shash_desc_ctx(desc);
|
|
|
|
mctx->hash[0] = 0x67452301;
|
|
mctx->hash[1] = 0xefcdab89;
|
|
mctx->hash[2] = 0x98badcfe;
|
|
mctx->hash[3] = 0x10325476;
|
|
mctx->byte_count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int md4_update(struct shash_desc *desc, const u8 *data, unsigned int len)
|
|
{
|
|
struct md4_ctx *mctx = shash_desc_ctx(desc);
|
|
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
|
|
|
|
mctx->byte_count += len;
|
|
|
|
if (avail > len) {
|
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
|
data, len);
|
|
return 0;
|
|
}
|
|
|
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
|
data, avail);
|
|
|
|
md4_transform_helper(mctx);
|
|
data += avail;
|
|
len -= avail;
|
|
|
|
while (len >= sizeof(mctx->block)) {
|
|
memcpy(mctx->block, data, sizeof(mctx->block));
|
|
md4_transform_helper(mctx);
|
|
data += sizeof(mctx->block);
|
|
len -= sizeof(mctx->block);
|
|
}
|
|
|
|
memcpy(mctx->block, data, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int md4_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
struct md4_ctx *mctx = shash_desc_ctx(desc);
|
|
const unsigned int offset = mctx->byte_count & 0x3f;
|
|
char *p = (char *)mctx->block + offset;
|
|
int padding = 56 - (offset + 1);
|
|
|
|
*p++ = 0x80;
|
|
if (padding < 0) {
|
|
memset(p, 0x00, padding + sizeof (u64));
|
|
md4_transform_helper(mctx);
|
|
p = (char *)mctx->block;
|
|
padding = 56;
|
|
}
|
|
|
|
memset(p, 0, padding);
|
|
mctx->block[14] = mctx->byte_count << 3;
|
|
mctx->block[15] = mctx->byte_count >> 29;
|
|
le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
|
|
sizeof(u64)) / sizeof(u32));
|
|
md4_transform(mctx->hash, mctx->block);
|
|
cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash));
|
|
memcpy(out, mctx->hash, sizeof(mctx->hash));
|
|
memset(mctx, 0, sizeof(*mctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct shash_alg alg = {
|
|
.digestsize = MD4_DIGEST_SIZE,
|
|
.init = md4_init,
|
|
.update = md4_update,
|
|
.final = md4_final,
|
|
.descsize = sizeof(struct md4_ctx),
|
|
.base = {
|
|
.cra_name = "md4",
|
|
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.cra_blocksize = MD4_HMAC_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init md4_mod_init(void)
|
|
{
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit md4_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_init(md4_mod_init);
|
|
module_exit(md4_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("MD4 Message Digest Algorithm");
|
|
|