mirror of
https://github.com/torvalds/linux.git
synced 2025-08-15 06:01:56 +02:00
ef93f15628
This reverts commit c4741b2305.
Crypto API self-tests no longer run at registration time and now
occur either at late_initcall or upon the first use.
Therefore the premise of the above commit no longer exists. Revert
it and subsequent additions of subsys_initcall and arch_initcall.
Note that lib/crypto calls will stay at subsys_initcall (or rather
downgraded from arch_initcall) because they may need to occur
before Crypto API registration.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
224 lines
6.8 KiB
C
224 lines
6.8 KiB
C
/*
|
|
* Cryptographic API.
|
|
*
|
|
* MD5 Message Digest Algorithm (RFC1321).
|
|
*
|
|
* Derived from cryptoapi implementation, originally based on the
|
|
* public domain implementation written by Colin Plumb in 1993.
|
|
*
|
|
* Copyright (c) Cryptoapi developers.
|
|
* 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 <crypto/md5.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
|
|
const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = {
|
|
0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
|
|
0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
|
|
};
|
|
EXPORT_SYMBOL_GPL(md5_zero_message_hash);
|
|
|
|
#define F1(x, y, z) (z ^ (x & (y ^ z)))
|
|
#define F2(x, y, z) F1(z, x, y)
|
|
#define F3(x, y, z) (x ^ y ^ z)
|
|
#define F4(x, y, z) (y ^ (x | ~z))
|
|
|
|
#define MD5STEP(f, w, x, y, z, in, s) \
|
|
(w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
|
|
|
|
static void md5_transform(__u32 *hash, __u32 const *in)
|
|
{
|
|
u32 a, b, c, d;
|
|
|
|
a = hash[0];
|
|
b = hash[1];
|
|
c = hash[2];
|
|
d = hash[3];
|
|
|
|
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
|
|
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
|
|
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
|
|
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
|
|
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
|
|
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
|
|
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
|
|
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
|
|
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
|
|
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
|
|
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
|
|
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
|
|
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
|
|
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
|
|
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
|
|
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
|
|
|
|
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
|
|
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
|
|
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
|
|
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
|
|
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
|
|
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
|
|
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
|
|
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
|
|
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
|
|
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
|
|
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
|
|
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
|
|
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
|
|
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
|
|
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
|
|
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
|
|
|
|
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
|
|
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
|
|
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
|
|
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
|
|
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
|
|
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
|
|
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
|
|
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
|
|
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
|
|
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
|
|
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
|
|
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
|
|
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
|
|
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
|
|
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
|
|
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
|
|
|
|
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
|
|
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
|
|
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
|
|
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
|
|
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
|
|
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
|
|
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
|
|
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
|
|
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
|
|
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
|
|
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
|
|
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
|
|
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
|
|
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
|
|
|
|
hash[0] += a;
|
|
hash[1] += b;
|
|
hash[2] += c;
|
|
hash[3] += d;
|
|
}
|
|
|
|
static inline void md5_transform_helper(struct md5_state *ctx,
|
|
u32 block[MD5_BLOCK_WORDS])
|
|
{
|
|
le32_to_cpu_array(block, MD5_BLOCK_WORDS);
|
|
md5_transform(ctx->hash, block);
|
|
}
|
|
|
|
static int md5_init(struct shash_desc *desc)
|
|
{
|
|
struct md5_state *mctx = shash_desc_ctx(desc);
|
|
|
|
mctx->hash[0] = MD5_H0;
|
|
mctx->hash[1] = MD5_H1;
|
|
mctx->hash[2] = MD5_H2;
|
|
mctx->hash[3] = MD5_H3;
|
|
mctx->byte_count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int md5_update(struct shash_desc *desc, const u8 *data, unsigned int len)
|
|
{
|
|
struct md5_state *mctx = shash_desc_ctx(desc);
|
|
u32 block[MD5_BLOCK_WORDS];
|
|
|
|
mctx->byte_count += len;
|
|
do {
|
|
memcpy(block, data, sizeof(block));
|
|
md5_transform_helper(mctx, block);
|
|
data += sizeof(block);
|
|
len -= sizeof(block);
|
|
} while (len >= sizeof(block));
|
|
memzero_explicit(block, sizeof(block));
|
|
mctx->byte_count -= len;
|
|
return len;
|
|
}
|
|
|
|
static int md5_finup(struct shash_desc *desc, const u8 *data, unsigned int len,
|
|
u8 *out)
|
|
{
|
|
struct md5_state *mctx = shash_desc_ctx(desc);
|
|
u32 block[MD5_BLOCK_WORDS];
|
|
unsigned int offset;
|
|
int padding;
|
|
char *p;
|
|
|
|
memcpy(block, data, len);
|
|
|
|
offset = len;
|
|
p = (char *)block + offset;
|
|
padding = 56 - (offset + 1);
|
|
|
|
*p++ = 0x80;
|
|
if (padding < 0) {
|
|
memset(p, 0x00, padding + sizeof (u64));
|
|
md5_transform_helper(mctx, block);
|
|
p = (char *)block;
|
|
padding = 56;
|
|
}
|
|
|
|
memset(p, 0, padding);
|
|
mctx->byte_count += len;
|
|
block[14] = mctx->byte_count << 3;
|
|
block[15] = mctx->byte_count >> 29;
|
|
le32_to_cpu_array(block, (sizeof(block) - sizeof(u64)) / sizeof(u32));
|
|
md5_transform(mctx->hash, block);
|
|
memzero_explicit(block, sizeof(block));
|
|
cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
|
|
memcpy(out, mctx->hash, sizeof(mctx->hash));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct shash_alg alg = {
|
|
.digestsize = MD5_DIGEST_SIZE,
|
|
.init = md5_init,
|
|
.update = md5_update,
|
|
.finup = md5_finup,
|
|
.descsize = MD5_STATE_SIZE,
|
|
.base = {
|
|
.cra_name = "md5",
|
|
.cra_driver_name = "md5-generic",
|
|
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
|
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init md5_mod_init(void)
|
|
{
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit md5_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_init(md5_mod_init);
|
|
module_exit(md5_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("MD5 Message Digest Algorithm");
|
|
MODULE_ALIAS_CRYPTO("md5");
|