| // 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"); |