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// SPDX-License-Identifier: GPL-2.0+
/*
* Cryptographic API.
*
* s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
*
* Copyright IBM Corp. 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
*/
#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <asm/cpacf.h>
#include "sha.h"
static int sha512_init(struct shash_desc *desc)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
*(__u64 *)&ctx->state[0] = SHA512_H0;
*(__u64 *)&ctx->state[2] = SHA512_H1;
*(__u64 *)&ctx->state[4] = SHA512_H2;
*(__u64 *)&ctx->state[6] = SHA512_H3;
*(__u64 *)&ctx->state[8] = SHA512_H4;
*(__u64 *)&ctx->state[10] = SHA512_H5;
*(__u64 *)&ctx->state[12] = SHA512_H6;
*(__u64 *)&ctx->state[14] = SHA512_H7;
ctx->count = 0;
ctx->func = CPACF_KIMD_SHA_512;
return 0;
}
static int sha512_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha512_state *octx = out;
octx->count[0] = sctx->count;
octx->count[1] = 0;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
return 0;
}
static int sha512_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha512_state *ictx = in;
if (unlikely(ictx->count[1]))
return -ERANGE;
sctx->count = ictx->count[0];
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = CPACF_KIMD_SHA_512;
return 0;
}
static struct shash_alg sha512_alg = {
.digestsize = SHA512_DIGEST_SIZE,
.init = sha512_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha512_export,
.import = sha512_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha512_state),
.base = {
.cra_name = "sha512",
.cra_driver_name= "sha512-s390",
.cra_priority = 300,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha512");
static int sha384_init(struct shash_desc *desc)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
*(__u64 *)&ctx->state[0] = SHA384_H0;
*(__u64 *)&ctx->state[2] = SHA384_H1;
*(__u64 *)&ctx->state[4] = SHA384_H2;
*(__u64 *)&ctx->state[6] = SHA384_H3;
*(__u64 *)&ctx->state[8] = SHA384_H4;
*(__u64 *)&ctx->state[10] = SHA384_H5;
*(__u64 *)&ctx->state[12] = SHA384_H6;
*(__u64 *)&ctx->state[14] = SHA384_H7;
ctx->count = 0;
ctx->func = CPACF_KIMD_SHA_512;
return 0;
}
static struct shash_alg sha384_alg = {
.digestsize = SHA384_DIGEST_SIZE,
.init = sha384_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha512_export,
.import = sha512_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha512_state),
.base = {
.cra_name = "sha384",
.cra_driver_name= "sha384-s390",
.cra_priority = 300,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_sha_ctx),
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha384");
static int __init init(void)
{
int ret;
if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
return -ENODEV;
if ((ret = crypto_register_shash(&sha512_alg)) < 0)
goto out;
if ((ret = crypto_register_shash(&sha384_alg)) < 0)
crypto_unregister_shash(&sha512_alg);
out:
return ret;
}
static void __exit fini(void)
{
crypto_unregister_shash(&sha512_alg);
crypto_unregister_shash(&sha384_alg);
}
module_cpu_feature_match(MSA, init);
module_exit(fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");
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