diff options
Diffstat (limited to 'arch/s390/crypto/sha256_s390.c')
| -rw-r--r-- | arch/s390/crypto/sha256_s390.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/s390/crypto/sha256_s390.c b/arch/s390/crypto/sha256_s390.c new file mode 100644 index 000000000..6f1ccdf93 --- /dev/null +++ b/arch/s390/crypto/sha256_s390.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * 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) + */ +#include <crypto/internal/hash.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/cpufeature.h> +#include <crypto/sha2.h> +#include <asm/cpacf.h> + +#include "sha.h" + +static int s390_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 = s390_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_blocksize = SHA256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int s390_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 = s390_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_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 -ENODEV; + 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(S390_CPU_FEATURE_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"); |