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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Cryptographic API.
*
* powerpc implementation of the SHA1 Secure Hash Algorithm.
*
* Derived from cryptoapi implementation, adapted for in-place
* scatterlist interface.
*
* Derived from "crypto/sha1.c"
* Copyright (c) Alan Smithee.
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
*/
#include <crypto/internal/hash.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <linux/kernel.h>
#include <linux/module.h>
asmlinkage void powerpc_sha_transform(u32 *state, const u8 *src);
static void powerpc_sha_block(struct sha1_state *sctx, const u8 *data,
int blocks)
{
do {
powerpc_sha_transform(sctx->state, data);
data += 64;
} while (--blocks);
}
static int powerpc_sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return sha1_base_do_update_blocks(desc, data, len, powerpc_sha_block);
}
/* Add padding and return the message digest. */
static int powerpc_sha1_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *out)
{
sha1_base_do_finup(desc, src, len, powerpc_sha_block);
return sha1_base_finish(desc, out);
}
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_base_init,
.update = powerpc_sha1_update,
.finup = powerpc_sha1_finup,
.descsize = SHA1_STATE_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name= "sha1-powerpc",
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha1_powerpc_mod_init(void)
{
return crypto_register_shash(&alg);
}
static void __exit sha1_powerpc_mod_fini(void)
{
crypto_unregister_shash(&alg);
}
module_init(sha1_powerpc_mod_init);
module_exit(sha1_powerpc_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
MODULE_ALIAS_CRYPTO("sha1");
MODULE_ALIAS_CRYPTO("sha1-powerpc");
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