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/*
* Cryptographic API.
*
* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
*
* s390 Version:
* Copyright IBM Corp. 2005, 2011
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* 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/module.h>
#include <linux/cpufeature.h>
#include <crypto/sha.h>
#include <asm/cpacf.h>
#include "sha.h"
static int sha256_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
sctx->state[0] = SHA256_H0;
sctx->state[1] = SHA256_H1;
sctx->state[2] = SHA256_H2;
sctx->state[3] = SHA256_H3;
sctx->state[4] = SHA256_H4;
sctx->state[5] = SHA256_H5;
sctx->state[6] = SHA256_H6;
sctx->state[7] = SHA256_H7;
sctx->count = 0;
sctx->func = CPACF_KIMD_SHA_256;
return 0;
}
static int sha256_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha256_state *octx = out;
octx->count = sctx->count;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
return 0;
}
static int sha256_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha256_state *ictx = in;
sctx->count = ictx->count;
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = CPACF_KIMD_SHA_256;
return 0;
}
static struct shash_alg sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = sha256_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 = "sha256",
.cra_driver_name= "sha256-s390",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
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 = CPACF_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 = 300,
.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 (!cpacf_query(CPACF_KIMD, CPACF_KIMD_SHA_256))
return -EOPNOTSUPP;
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(&sha224_alg);
crypto_unregister_shash(&sha256_alg);
}
module_cpu_feature_match(MSA, sha256_s390_init);
module_exit(sha256_s390_fini);
MODULE_ALIAS_CRYPTO("sha256");
MODULE_ALIAS_CRYPTO("sha224");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");
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