157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
/*
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* Cryptographic API.
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*
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* s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
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*
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* Copyright IBM Corp. 2007
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* Author(s): Jan Glauber (jang@de.ibm.com)
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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 <crypto/sha.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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#include "sha.h"
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#include "crypt_s390.h"
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static int sha512_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
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*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
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*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
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*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
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*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
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*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
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*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
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*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
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*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
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ctx->count = 0;
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ctx->func = KIMD_SHA_512;
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return 0;
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}
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static int sha512_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 sha512_state *octx = out;
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octx->count[0] = sctx->count;
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octx->count[1] = 0;
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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 sha512_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 sha512_state *ictx = in;
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if (unlikely(ictx->count[1]))
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return -ERANGE;
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sctx->count = ictx->count[0];
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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_512;
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return 0;
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}
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static struct shash_alg sha512_alg = {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = sha512_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha512_export,
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.import = sha512_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name= "sha512-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 = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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MODULE_ALIAS_CRYPTO("sha512");
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static int sha384_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
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*(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
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*(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
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*(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
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*(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
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*(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
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*(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
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*(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
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*(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
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ctx->count = 0;
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ctx->func = KIMD_SHA_512;
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return 0;
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}
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static struct shash_alg sha384_alg = {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = sha384_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha512_export,
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.import = sha512_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name= "sha384-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 = SHA384_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct s390_sha_ctx),
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.cra_module = THIS_MODULE,
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}
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};
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MODULE_ALIAS_CRYPTO("sha384");
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static int __init init(void)
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{
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int ret;
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if (!crypt_s390_func_available(KIMD_SHA_512, CRYPT_S390_MSA))
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return -EOPNOTSUPP;
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if ((ret = crypto_register_shash(&sha512_alg)) < 0)
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goto out;
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if ((ret = crypto_register_shash(&sha384_alg)) < 0)
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crypto_unregister_shash(&sha512_alg);
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out:
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return ret;
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}
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static void __exit fini(void)
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{
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crypto_unregister_shash(&sha512_alg);
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crypto_unregister_shash(&sha384_alg);
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}
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module_cpu_feature_match(MSA, init);
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module_exit(fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");
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