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crypto: s390 - support hardware accelerated SHA-224

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On recent s390 machines hardware acceleration is available for SHA-256.
SHA-224 is based on SHA-256 so it can also be accelerated by hardware.
Do this by adding the proper algorithm description and initialization.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jan Glauber 2011-07-04 20:06:01 +08:00 committed by Herbert Xu
parent 269230e7c5
commit e3b4f515c4
1 changed files with 55 additions and 11 deletions
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66
arch/s390/crypto/sha256_s390.c
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@ -1,15 +1,12 @@
/*
* Cryptographic API.
*
* s390 implementation of the SHA256 Secure Hash Algorithm.
* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
*
* s390 Version:
* Copyright IBM Corp. 2005,2007
* Copyright IBM Corp. 2005,2011
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* Derived from "crypto/sha256_generic.c"
* and "arch/s390/crypto/sha1_s390.c"
*
* 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)
@ -65,7 +62,7 @@ static int sha256_import(struct shash_desc *desc, const void *in)
return 0;
}
static struct shash_alg alg = {
static struct shash_alg sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = sha256_init,
.update = s390_sha_update,
@ -84,22 +81,69 @@ static struct shash_alg alg = {
}
};
static int sha256_s390_init(void)
static int sha224_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
sctx->state[0] = SHA224_H0;
sctx->state[1] = SHA224_H1;
sctx->state[2] = SHA224_H2;
sctx->state[3] = SHA224_H3;
sctx->state[4] = SHA224_H4;
sctx->state[5] = SHA224_H5;
sctx->state[6] = SHA224_H6;
sctx->state[7] = SHA224_H7;
sctx->count = 0;
sctx->func = KIMD_SHA_256;
return 0;
}
static struct shash_alg sha224_alg = {
.digestsize = SHA224_DIGEST_SIZE,
.init = sha224_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha256_export,
.import = sha256_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha224",
.cra_driver_name= "sha224-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha256_s390_init(void)
{
int ret;
if (!crypt_s390_func_available(KIMD_SHA_256, CRYPT_S390_MSA))
return -EOPNOTSUPP;
return crypto_register_shash(&alg);
ret = crypto_register_shash(&sha256_alg);
if (ret < 0)
goto out;
ret = crypto_register_shash(&sha224_alg);
if (ret < 0)
crypto_unregister_shash(&sha256_alg);
out:
return ret;
}
static void __exit sha256_s390_fini(void)
{
crypto_unregister_shash(&alg);
crypto_unregister_shash(&sha224_alg);
crypto_unregister_shash(&sha256_alg);
}
module_init(sha256_s390_init);
module_exit(sha256_s390_fini);
MODULE_ALIAS("sha256");
MODULE_ALIAS("sha224");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");
MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");