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// SPDX-License-Identifier: GPL-2.0+
/*
* Cryptographic API.
*
* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
*
* s390 Version:
* Copyright IBM Corp. 2019
* Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <crypto/sha3.h>
#include <asm/cpacf.h>
#include "sha.h"
static int sha3_256_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
memset(sctx->state, 0, sizeof(sctx->state));
sctx->count = 0;
sctx->func = CPACF_KIMD_SHA3_256;
return 0;
}
static int sha3_256_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha3_state *octx = out;
octx->rsiz = sctx->count;
memcpy(octx->st, sctx->state, sizeof(octx->st));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
return 0;
}
static int sha3_256_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha3_state *ictx = in;
sctx->count = ictx->rsiz;
memcpy(sctx->state, ictx->st, sizeof(ictx->st));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = CPACF_KIMD_SHA3_256;
return 0;
}
static int sha3_224_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha3_state *ictx = in;
sctx->count = ictx->rsiz;
memcpy(sctx->state, ictx->st, sizeof(ictx->st));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = CPACF_KIMD_SHA3_224;
return 0;
}
static struct shash_alg sha3_256_alg = {
.digestsize = SHA3_256_DIGEST_SIZE, /* = 32 */
.init = sha3_256_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha3_256_export,
.import = sha3_256_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha3_state),
.base = {
.cra_name = "sha3-256",
.cra_driver_name = "sha3-256-s390",
.cra_priority = 300,
.cra_blocksize = SHA3_256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int sha3_224_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
memset(sctx->state, 0, sizeof(sctx->state));
sctx->count = 0;
sctx->func = CPACF_KIMD_SHA3_224;
return 0;
}
static struct shash_alg sha3_224_alg = {
.digestsize = SHA3_224_DIGEST_SIZE,
.init = sha3_224_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha3_256_export, /* same as for 256 */
.import = sha3_224_import, /* function code different! */
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha3_state),
.base = {
.cra_name = "sha3-224",
.cra_driver_name = "sha3-224-s390",
.cra_priority = 300,
.cra_blocksize = SHA3_224_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha3_256_s390_init(void)
{
int ret;
if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_256))
return -ENODEV;
ret = crypto_register_shash(&sha3_256_alg);
if (ret < 0)
goto out;
ret = crypto_register_shash(&sha3_224_alg);
if (ret < 0)
crypto_unregister_shash(&sha3_256_alg);
out:
return ret;
}
static void __exit sha3_256_s390_fini(void)
{
crypto_unregister_shash(&sha3_224_alg);
crypto_unregister_shash(&sha3_256_alg);
}
module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha3_256_s390_init);
module_exit(sha3_256_s390_fini);
MODULE_ALIAS_CRYPTO("sha3-256");
MODULE_ALIAS_CRYPTO("sha3-224");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm");
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