mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
60fded5709
Use the Crypto API partial block handling. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Glue code for MD5 implementation for PPC assembler
|
|
*
|
|
* Based on generic implementation.
|
|
*
|
|
* Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de>
|
|
*/
|
|
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/md5.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
|
|
extern void ppc_md5_transform(u32 *state, const u8 *src, u32 blocks);
|
|
|
|
static int ppc_md5_init(struct shash_desc *desc)
|
|
{
|
|
struct md5_state *sctx = shash_desc_ctx(desc);
|
|
|
|
sctx->hash[0] = MD5_H0;
|
|
sctx->hash[1] = MD5_H1;
|
|
sctx->hash[2] = MD5_H2;
|
|
sctx->hash[3] = MD5_H3;
|
|
sctx->byte_count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ppc_md5_update(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
struct md5_state *sctx = shash_desc_ctx(desc);
|
|
|
|
sctx->byte_count += round_down(len, MD5_HMAC_BLOCK_SIZE);
|
|
ppc_md5_transform(sctx->hash, data, len >> 6);
|
|
return len - round_down(len, MD5_HMAC_BLOCK_SIZE);
|
|
}
|
|
|
|
static int ppc_md5_finup(struct shash_desc *desc, const u8 *src,
|
|
unsigned int offset, u8 *out)
|
|
{
|
|
struct md5_state *sctx = shash_desc_ctx(desc);
|
|
__le64 block[MD5_BLOCK_WORDS] = {};
|
|
u8 *p = memcpy(block, src, offset);
|
|
__le32 *dst = (__le32 *)out;
|
|
__le64 *pbits;
|
|
|
|
src = p;
|
|
p += offset;
|
|
*p++ = 0x80;
|
|
sctx->byte_count += offset;
|
|
pbits = &block[(MD5_BLOCK_WORDS / (offset > 55 ? 1 : 2)) - 1];
|
|
*pbits = cpu_to_le64(sctx->byte_count << 3);
|
|
ppc_md5_transform(sctx->hash, src, (pbits - block + 1) / 8);
|
|
memzero_explicit(block, sizeof(block));
|
|
|
|
dst[0] = cpu_to_le32(sctx->hash[0]);
|
|
dst[1] = cpu_to_le32(sctx->hash[1]);
|
|
dst[2] = cpu_to_le32(sctx->hash[2]);
|
|
dst[3] = cpu_to_le32(sctx->hash[3]);
|
|
return 0;
|
|
}
|
|
|
|
static struct shash_alg alg = {
|
|
.digestsize = MD5_DIGEST_SIZE,
|
|
.init = ppc_md5_init,
|
|
.update = ppc_md5_update,
|
|
.finup = ppc_md5_finup,
|
|
.descsize = MD5_STATE_SIZE,
|
|
.base = {
|
|
.cra_name = "md5",
|
|
.cra_driver_name= "md5-ppc",
|
|
.cra_priority = 200,
|
|
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
|
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init ppc_md5_mod_init(void)
|
|
{
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit ppc_md5_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_init(ppc_md5_mod_init);
|
|
module_exit(ppc_md5_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("MD5 Secure Hash Algorithm, PPC assembler");
|
|
|
|
MODULE_ALIAS_CRYPTO("md5");
|
|
MODULE_ALIAS_CRYPTO("md5-ppc");
|