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[CRYPTO] sha512: Hardware acceleration for s390 

Exploit the System z10 hardware acceleration for SHA512.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jan Glauber 2008-03-06 19:52:00 +08:00 committed by Herbert Xu
parent 604973f1fe
commit 291dc7c099
6 changed files with 97 additions and 4 deletions
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1
arch/s390/crypto/Makefile
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@ -4,6 +4,7 @@
obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA512_S390) += sha512_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o des_check_key.o
obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
obj-$(CONFIG_S390_PRNG) += prng.o

2
arch/s390/crypto/crypt_s390.h
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@ -82,6 +82,7 @@ enum crypt_s390_kimd_func {
KIMD_QUERY = CRYPT_S390_KIMD | 0,
KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
};
/*
@ -92,6 +93,7 @@ enum crypt_s390_klmd_func {
KLMD_QUERY = CRYPT_S390_KLMD | 0,
KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
};
/*

5
arch/s390/crypto/sha.h
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@ -19,11 +19,12 @@
#include <crypto/sha.h>
/* must be big enough for the largest SHA variant */
#define SHA_MAX_BLOCK_SIZE SHA256_BLOCK_SIZE
#define SHA_MAX_STATE_SIZE 16
#define SHA_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
struct s390_sha_ctx {
u64 count; /* message length in bytes */
u32 state[8];
u32 state[SHA_MAX_STATE_SIZE];
u8 buf[2 * SHA_MAX_BLOCK_SIZE];
int func; /* KIMD function to use */
};

71
arch/s390/crypto/sha512_s390.c Normal file
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@ -0,0 +1,71 @@
/*
* Cryptographic API.
*
* s390 implementation of the SHA512 Secure Hash Algorithm.
*
* Copyright IBM Corp. 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/crypto.h>
#include "sha.h"
#include "crypt_s390.h"
static void sha512_init(struct crypto_tfm *tfm)
{
struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
ctx->count = 0;
ctx->func = KIMD_SHA_512;
}
static struct crypto_alg alg = {
.cra_name = "sha512",
.cra_driver_name = "sha512-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_sha_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(alg.cra_list),
.cra_u = { .digest = {
.dia_digestsize = SHA512_DIGEST_SIZE,
.dia_init = sha512_init,
.dia_update = s390_sha_update,
.dia_final = s390_sha_final } }
};
static int __init init(void)
{
if (!crypt_s390_func_available(KIMD_SHA_512))
return -EOPNOTSUPP;
return crypto_register_alg(&alg);
}
static void __exit fini(void)
{
crypto_unregister_alg(&alg);
}
module_init(init);
module_exit(fini);
MODULE_ALIAS("sha512");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm");

11
arch/s390/crypto/sha_common.c
View File

@ -59,12 +59,15 @@ void s390_sha_final(struct crypto_tfm *tfm, u8 *out)
struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
unsigned int bsize = crypto_tfm_alg_blocksize(tfm);
u64 bits;
unsigned int index, end;
unsigned int index, end, plen;
int ret;
/* SHA-512 uses 128 bit padding length */
plen = (bsize > SHA256_BLOCK_SIZE) ? 16 : 8;
/* must perform manual padding */
index = ctx->count & (bsize - 1);
end = (index < bsize - 8) ? bsize : (2 * bsize);
end = (index < bsize - plen) ? bsize : (2 * bsize);
/* start pad with 1 */
ctx->buf[index] = 0x80;
@ -73,6 +76,10 @@ void s390_sha_final(struct crypto_tfm *tfm, u8 *out)
/* pad with zeros */
memset(ctx->buf + index, 0x00, end - index - 8);
/*
* Append message length. Well, SHA-512 wants a 128 bit lenght value,
* nevertheless we use u64, should be enough for now...
*/
bits = ctx->count * 8;
memcpy(ctx->buf + end - 8, &bits, sizeof(bits));

11
drivers/crypto/Kconfig
View File

@ -101,6 +101,17 @@ config CRYPTO_SHA256_S390
This version of SHA implements a 256 bit hash with 128 bits of
security against collision attacks.
config CRYPTO_SHA512_S390
tristate "SHA512 digest algorithm"
depends on S390
select CRYPTO_ALGAPI
help
This is the s390 hardware accelerated implementation of the
SHA512 secure hash standard.
This version of SHA implements a 512 bit hash with 256 bits of
security against collision attacks.
config CRYPTO_DES_S390
tristate "DES and Triple DES cipher algorithms"
depends on S390