/* * 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_func(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");