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Commit 291dc7c0 authored by Jan Glauber's avatar Jan Glauber Committed by Herbert Xu
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[CRYPTO] sha512: Hardware acceleration for s390 



Exploit the System z10 hardware acceleration for SHA512.

Signed-off-by: default avatarJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 604973f1

arch/s390/crypto/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/crypto/crypt_s390.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

};



/*

arch/s390/crypto/sha.h

+3 −2
Original line number Diff line number Diff line
@@ -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 */

};

arch/s390/crypto/sha512_s390.c

0 → 100644
+71 −0
Original line number Diff line number Diff line 
/*

 * 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");

arch/s390/crypto/sha_common.c

+9 −2
Original line number Diff line number Diff line
@@ -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));