diff options
Diffstat (limited to 'arch/s390/crypto/sha512_s390.c')
| -rw-r--r-- | arch/s390/crypto/sha512_s390.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/arch/s390/crypto/sha512_s390.c b/arch/s390/crypto/sha512_s390.c new file mode 100644 index 000000000..04f11c407 --- /dev/null +++ b/arch/s390/crypto/sha512_s390.c @@ -0,0 +1,149 @@ +// 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(S390_CPU_FEATURE_MSA, init); +module_exit(fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm"); |