106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
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/*
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* Cryptographic API.
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*
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* s390 implementation of the SHA256 Secure Hash Algorithm.
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*
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* s390 Version:
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* Copyright IBM Corp. 2005,2007
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* Author(s): Jan Glauber (jang@de.ibm.com)
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*
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* Derived from "crypto/sha256_generic.c"
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* and "arch/s390/crypto/sha1_s390.c"
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <crypto/sha.h>
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#include "crypt_s390.h"
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#include "sha.h"
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static int sha256_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA256_H0;
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sctx->state[1] = SHA256_H1;
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sctx->state[2] = SHA256_H2;
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sctx->state[3] = SHA256_H3;
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sctx->state[4] = SHA256_H4;
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sctx->state[5] = SHA256_H5;
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sctx->state[6] = SHA256_H6;
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sctx->state[7] = SHA256_H7;
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sctx->count = 0;
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sctx->func = KIMD_SHA_256;
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return 0;
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}
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static int sha256_export(struct shash_desc *desc, void *out)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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struct sha256_state *octx = out;
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octx->count = sctx->count;
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memcpy(octx->state, sctx->state, sizeof(octx->state));
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memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
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return 0;
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}
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static int sha256_import(struct shash_desc *desc, const void *in)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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const struct sha256_state *ictx = in;
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sctx->count = ictx->count;
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memcpy(sctx->state, ictx->state, sizeof(ictx->state));
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memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
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sctx->func = KIMD_SHA_256;
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = SHA256_DIGEST_SIZE,
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.init = sha256_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha256_export,
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.import = sha256_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-s390",
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.cra_priority = CRYPT_S390_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int sha256_s390_init(void)
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{
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if (!crypt_s390_func_available(KIMD_SHA_256))
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return -EOPNOTSUPP;
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return crypto_register_shash(&alg);
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}
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static void __exit sha256_s390_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_init(sha256_s390_init);
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module_exit(sha256_s390_fini);
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MODULE_ALIAS("sha256");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");
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