diff options
Diffstat (limited to 'arch/s390/crypto/sha1_s390.c')
| -rw-r--r-- | arch/s390/crypto/sha1_s390.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c new file mode 100644 index 000000000..bc3a22704 --- /dev/null +++ b/arch/s390/crypto/sha1_s390.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Cryptographic API. + * + * s390 implementation of the SHA1 Secure Hash Algorithm. + * + * Derived from cryptoapi implementation, adapted for in-place + * scatterlist interface. Originally based on the public domain + * implementation written by Steve Reid. + * + * s390 Version: + * Copyright IBM Corp. 2003, 2007 + * Author(s): Thomas Spatzier + * Jan Glauber (jan.glauber@de.ibm.com) + * + * Derived from "crypto/sha1_generic.c" + * Copyright (c) Alan Smithee. + * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> + * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> + */ +#include <crypto/internal/hash.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/cpufeature.h> +#include <crypto/sha1.h> +#include <asm/cpacf.h> + +#include "sha.h" + +static int s390_sha1_init(struct shash_desc *desc) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + + sctx->state[0] = SHA1_H0; + sctx->state[1] = SHA1_H1; + sctx->state[2] = SHA1_H2; + sctx->state[3] = SHA1_H3; + sctx->state[4] = SHA1_H4; + sctx->count = 0; + sctx->func = CPACF_KIMD_SHA_1; + + return 0; +} + +static int s390_sha1_export(struct shash_desc *desc, void *out) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + struct sha1_state *octx = out; + + octx->count = sctx->count; + memcpy(octx->state, sctx->state, sizeof(octx->state)); + memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer)); + return 0; +} + +static int s390_sha1_import(struct shash_desc *desc, const void *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + const struct sha1_state *ictx = in; + + sctx->count = ictx->count; + memcpy(sctx->state, ictx->state, sizeof(ictx->state)); + memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer)); + sctx->func = CPACF_KIMD_SHA_1; + return 0; +} + +static struct shash_alg alg = { + .digestsize = SHA1_DIGEST_SIZE, + .init = s390_sha1_init, + .update = s390_sha_update, + .final = s390_sha_final, + .export = s390_sha1_export, + .import = s390_sha1_import, + .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha1_state), + .base = { + .cra_name = "sha1", + .cra_driver_name= "sha1-s390", + .cra_priority = 300, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int __init sha1_s390_init(void) +{ + if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1)) + return -ENODEV; + return crypto_register_shash(&alg); +} + +static void __exit sha1_s390_fini(void) +{ + crypto_unregister_shash(&alg); +} + +module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha1_s390_init); +module_exit(sha1_s390_fini); + +MODULE_ALIAS_CRYPTO("sha1"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); |