0a5f9b382c
Rework cpufeature implementation to allow for various cpu feature indications, which is not only limited to hwcap bits. This is achieved by adding a sequential list of cpu feature numbers, where each of them is mapped to an entry which indicates what this number is about. Each entry contains a type member, which indicates what feature name space to look into (e.g. hwcap, or cpu facility). If wanted this allows also to automatically load modules only in e.g. z/VM configurations. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Link: https://lore.kernel.org/r/20220713125644.16121-2-seiden@linux.ibm.com Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Cryptographic API.
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*
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* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
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*
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* s390 Version:
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* Copyright IBM Corp. 2005, 2011
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* Author(s): Jan Glauber (jang@de.ibm.com)
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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#include <crypto/sha2.h>
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#include <asm/cpacf.h>
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#include "sha.h"
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static int s390_sha256_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA256_H0;
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sctx->state[1] = SHA256_H1;
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sctx->state[2] = SHA256_H2;
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sctx->state[3] = SHA256_H3;
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sctx->state[4] = SHA256_H4;
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sctx->state[5] = SHA256_H5;
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sctx->state[6] = SHA256_H6;
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sctx->state[7] = SHA256_H7;
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sctx->count = 0;
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sctx->func = CPACF_KIMD_SHA_256;
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return 0;
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}
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static int sha256_export(struct shash_desc *desc, void *out)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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struct sha256_state *octx = out;
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octx->count = sctx->count;
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memcpy(octx->state, sctx->state, sizeof(octx->state));
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memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
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return 0;
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}
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static int sha256_import(struct shash_desc *desc, const void *in)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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const struct sha256_state *ictx = in;
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sctx->count = ictx->count;
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memcpy(sctx->state, ictx->state, sizeof(ictx->state));
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memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
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sctx->func = CPACF_KIMD_SHA_256;
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return 0;
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}
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static struct shash_alg sha256_alg = {
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.digestsize = SHA256_DIGEST_SIZE,
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.init = s390_sha256_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha256_export,
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.import = sha256_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-s390",
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.cra_priority = 300,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int s390_sha224_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA224_H0;
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sctx->state[1] = SHA224_H1;
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sctx->state[2] = SHA224_H2;
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sctx->state[3] = SHA224_H3;
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sctx->state[4] = SHA224_H4;
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sctx->state[5] = SHA224_H5;
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sctx->state[6] = SHA224_H6;
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sctx->state[7] = SHA224_H7;
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sctx->count = 0;
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sctx->func = CPACF_KIMD_SHA_256;
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return 0;
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}
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static struct shash_alg sha224_alg = {
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.digestsize = SHA224_DIGEST_SIZE,
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.init = s390_sha224_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha256_export,
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.import = sha256_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha224",
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.cra_driver_name= "sha224-s390",
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.cra_priority = 300,
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.cra_blocksize = SHA224_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sha256_s390_init(void)
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{
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int ret;
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if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_256))
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return -ENODEV;
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ret = crypto_register_shash(&sha256_alg);
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if (ret < 0)
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goto out;
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ret = crypto_register_shash(&sha224_alg);
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if (ret < 0)
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crypto_unregister_shash(&sha256_alg);
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out:
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return ret;
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}
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static void __exit sha256_s390_fini(void)
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{
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crypto_unregister_shash(&sha224_alg);
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crypto_unregister_shash(&sha256_alg);
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}
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module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha256_s390_init);
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module_exit(sha256_s390_fini);
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MODULE_ALIAS_CRYPTO("sha256");
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MODULE_ALIAS_CRYPTO("sha224");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");
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