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Commit 604973f1 authored by Jan Glauber's avatar Jan Glauber Committed by Herbert Xu
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[CRYPTO] s390: Generic sha_update and sha_final 



The sha_{update|final} functions are similar for every sha variant.
Since that is error-prone and redundant replace these functions by
a shared generic implementation for s390.

Signed-off-by: default avatarJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 607424d8

arch/s390/crypto/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -2,8 +2,8 @@ 
# Cryptographic API

#



obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o

obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o

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_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/sha.h

0 → 100644
+34 −0
Original line number Diff line number Diff line 
/*

 * Cryptographic API.

 *

 * s390 generic implementation of the SHA Secure Hash Algorithms.

 *

 * 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.

 *

 */

#ifndef _CRYPTO_ARCH_S390_SHA_H

#define _CRYPTO_ARCH_S390_SHA_H



#include <linux/crypto.h>

#include <crypto/sha.h>



/* must be big enough for the largest SHA variant */

#define SHA_MAX_BLOCK_SIZE      SHA256_BLOCK_SIZE



struct s390_sha_ctx {

	u64 count;              /* message length in bytes */

	u32 state[8];

	u8 buf[2 * SHA_MAX_BLOCK_SIZE];

	int func;		/* KIMD function to use */

};



void s390_sha_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len);

void s390_sha_final(struct crypto_tfm *tfm, u8 *out);



#endif

arch/s390/crypto/sha1_s390.c

+6 −85
Original line number Diff line number Diff line
@@ -29,16 +29,11 @@ 
#include <crypto/sha.h>



#include "crypt_s390.h"



struct s390_sha1_ctx {

	u64 count;		/* message length */

	u32 state[5];

	u8 buf[2 * SHA1_BLOCK_SIZE];

};

#include "sha.h"



static void sha1_init(struct crypto_tfm *tfm)

{

	struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);

	struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);



	sctx->state[0] = SHA1_H0;

	sctx->state[1] = SHA1_H1;
@@ -46,79 +41,7 @@ static void sha1_init(struct crypto_tfm *tfm) 
	sctx->state[3] = SHA1_H3;

	sctx->state[4] = SHA1_H4;

	sctx->count = 0;

}



static void sha1_update(struct crypto_tfm *tfm, const u8 *data,

			unsigned int len)

{

	struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);

	unsigned int index;

	int ret;



	/* how much is already in the buffer? */

	index = sctx->count & 0x3f;



	sctx->count += len;



	if (index + len < SHA1_BLOCK_SIZE)

		goto store;



	/* process one stored block */

	if (index) {

		memcpy(sctx->buf + index, data, SHA1_BLOCK_SIZE - index);

		ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buf,

				      SHA1_BLOCK_SIZE);

		BUG_ON(ret != SHA1_BLOCK_SIZE);

		data += SHA1_BLOCK_SIZE - index;

		len -= SHA1_BLOCK_SIZE - index;

	}



	/* process as many blocks as possible */

	if (len >= SHA1_BLOCK_SIZE) {

		ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, data,

				      len & ~(SHA1_BLOCK_SIZE - 1));

		BUG_ON(ret != (len & ~(SHA1_BLOCK_SIZE - 1)));

		data += ret;

		len -= ret;

	}



store:

	/* anything left? */

	if (len)

		memcpy(sctx->buf + index , data, len);

}



/* Add padding and return the message digest. */

static void sha1_final(struct crypto_tfm *tfm, u8 *out)

{

	struct s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);

	u64 bits;

	unsigned int index, end;

	int ret;



	/* must perform manual padding */

	index = sctx->count & 0x3f;

	end =  (index < 56) ? SHA1_BLOCK_SIZE : (2 * SHA1_BLOCK_SIZE);



	/* start pad with 1 */

	sctx->buf[index] = 0x80;



	/* pad with zeros */

	index++;

	memset(sctx->buf + index, 0x00, end - index - 8);



	/* append message length */

	bits = sctx->count * 8;

	memcpy(sctx->buf + end - 8, &bits, sizeof(bits));



	ret = crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buf, end);

	BUG_ON(ret != end);



	/* copy digest to out */

	memcpy(out, sctx->state, SHA1_DIGEST_SIZE);



	/* wipe context */

	memset(sctx, 0, sizeof *sctx);

	sctx->func = KIMD_SHA_1;

}



static struct crypto_alg alg = {
@@ -127,21 +50,20 @@ static struct crypto_alg alg = { 
	.cra_priority	=	CRYPT_S390_PRIORITY,

	.cra_flags	=	CRYPTO_ALG_TYPE_DIGEST,

	.cra_blocksize	=	SHA1_BLOCK_SIZE,

	.cra_ctxsize	=	sizeof(struct s390_sha1_ctx),

	.cra_ctxsize	=	sizeof(struct s390_sha_ctx),

	.cra_module	=	THIS_MODULE,

	.cra_list	=	LIST_HEAD_INIT(alg.cra_list),

	.cra_u		=	{ .digest = {

	.dia_digestsize	=	SHA1_DIGEST_SIZE,

	.dia_init	=	sha1_init,

	.dia_update	=	sha1_update,

	.dia_final	=	sha1_final } }

	.dia_update	=	s390_sha_update,

	.dia_final	=	s390_sha_final } }

};



static int __init sha1_s390_init(void)

{

	if (!crypt_s390_func_available(KIMD_SHA_1))

		return -EOPNOTSUPP;



	return crypto_register_alg(&alg);

}
@@ -154,6 +76,5 @@ module_init(sha1_s390_init); 
module_exit(sha1_s390_fini);



MODULE_ALIAS("sha1");



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");

arch/s390/crypto/sha256_s390.c

+6 −84
Original line number Diff line number Diff line
@@ -22,16 +22,11 @@ 
#include <crypto/sha.h>



#include "crypt_s390.h"



struct s390_sha256_ctx {

	u64 count;		/* message length */

	u32 state[8];

	u8 buf[2 * SHA256_BLOCK_SIZE];

};

#include "sha.h"



static void sha256_init(struct crypto_tfm *tfm)

{

	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);

	struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);



	sctx->state[0] = SHA256_H0;

	sctx->state[1] = SHA256_H1;
@@ -42,79 +37,7 @@ static void sha256_init(struct crypto_tfm *tfm) 
	sctx->state[6] = SHA256_H6;

	sctx->state[7] = SHA256_H7;

	sctx->count = 0;

}



static void sha256_update(struct crypto_tfm *tfm, const u8 *data,

			  unsigned int len)

{

	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);

	unsigned int index;

	int ret;



	/* how much is already in the buffer? */

	index = sctx->count & 0x3f;



	sctx->count += len;



	if ((index + len) < SHA256_BLOCK_SIZE)

		goto store;



	/* process one stored block */

	if (index) {

		memcpy(sctx->buf + index, data, SHA256_BLOCK_SIZE - index);

		ret = crypt_s390_kimd(KIMD_SHA_256, sctx->state, sctx->buf,

				      SHA256_BLOCK_SIZE);

		BUG_ON(ret != SHA256_BLOCK_SIZE);

		data += SHA256_BLOCK_SIZE - index;

		len -= SHA256_BLOCK_SIZE - index;

	}



	/* process as many blocks as possible */

	if (len >= SHA256_BLOCK_SIZE) {

		ret = crypt_s390_kimd(KIMD_SHA_256, sctx->state, data,

				      len & ~(SHA256_BLOCK_SIZE - 1));

		BUG_ON(ret != (len & ~(SHA256_BLOCK_SIZE - 1)));

		data += ret;

		len -= ret;

	}



store:

	/* anything left? */

	if (len)

		memcpy(sctx->buf + index , data, len);

}



/* Add padding and return the message digest */

static void sha256_final(struct crypto_tfm *tfm, u8 *out)

{

	struct s390_sha256_ctx *sctx = crypto_tfm_ctx(tfm);

	u64 bits;

	unsigned int index, end;

	int ret;



	/* must perform manual padding */

	index = sctx->count & 0x3f;

	end = (index < 56) ? SHA256_BLOCK_SIZE : (2 * SHA256_BLOCK_SIZE);



	/* start pad with 1 */

	sctx->buf[index] = 0x80;



	/* pad with zeros */

	index++;

	memset(sctx->buf + index, 0x00, end - index - 8);



	/* append message length */

	bits = sctx->count * 8;

	memcpy(sctx->buf + end - 8, &bits, sizeof(bits));



	ret = crypt_s390_kimd(KIMD_SHA_256, sctx->state, sctx->buf, end);

	BUG_ON(ret != end);



	/* copy digest to out */

	memcpy(out, sctx->state, SHA256_DIGEST_SIZE);



	/* wipe context */

	memset(sctx, 0, sizeof *sctx);

	sctx->func = KIMD_SHA_256;

}



static struct crypto_alg alg = {
@@ -123,14 +46,14 @@ static struct crypto_alg alg = { 
	.cra_priority	=	CRYPT_S390_PRIORITY,

	.cra_flags	=	CRYPTO_ALG_TYPE_DIGEST,

	.cra_blocksize	=	SHA256_BLOCK_SIZE,

	.cra_ctxsize	=	sizeof(struct s390_sha256_ctx),

	.cra_ctxsize	=	sizeof(struct s390_sha_ctx),

	.cra_module	=	THIS_MODULE,

	.cra_list	=	LIST_HEAD_INIT(alg.cra_list),

	.cra_u		=	{ .digest = {

	.dia_digestsize	=	SHA256_DIGEST_SIZE,

	.dia_init	=	sha256_init,

	.dia_update	=	sha256_update,

	.dia_final	=	sha256_final } }

	.dia_update	=	s390_sha_update,

	.dia_final	=	s390_sha_final } }

};



static int sha256_s390_init(void)
@@ -150,6 +73,5 @@ module_init(sha256_s390_init); 
module_exit(sha256_s390_fini);



MODULE_ALIAS("sha256");



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");

arch/s390/crypto/sha_common.c

0 → 100644
+90 −0
Original line number Diff line number Diff line 
/*

 * Cryptographic API.

 *

 * s390 generic implementation of the SHA Secure Hash Algorithms.

 *

 * 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/crypto.h>

#include "sha.h"

#include "crypt_s390.h"



void s390_sha_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)

{

	struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);

	unsigned int bsize = crypto_tfm_alg_blocksize(tfm);

	unsigned int index;

	int ret;



	/* how much is already in the buffer? */

	index = ctx->count & (bsize - 1);

	ctx->count += len;



	if ((index + len) < bsize)

		goto store;



	/* process one stored block */

	if (index) {

		memcpy(ctx->buf + index, data, bsize - index);

		ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, bsize);

		BUG_ON(ret != bsize);

		data += bsize - index;

		len -= bsize - index;

	}



	/* process as many blocks as possible */

	if (len >= bsize) {

		ret = crypt_s390_kimd(ctx->func, ctx->state, data,

				      len & ~(bsize - 1));

		BUG_ON(ret != (len & ~(bsize - 1)));

		data += ret;

		len -= ret;

	}

store:

	if (len)

		memcpy(ctx->buf + index , data, len);

}

EXPORT_SYMBOL_GPL(s390_sha_update);



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;

	int ret;



	/* must perform manual padding */

	index = ctx->count & (bsize - 1);

	end = (index < bsize - 8) ? bsize : (2 * bsize);



	/* start pad with 1 */

	ctx->buf[index] = 0x80;

	index++;



	/* pad with zeros */

	memset(ctx->buf + index, 0x00, end - index - 8);



	bits = ctx->count * 8;

	memcpy(ctx->buf + end - 8, &bits, sizeof(bits));



	ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, end);

	BUG_ON(ret != end);



	/* copy digest to out */

	memcpy(out, ctx->state, crypto_hash_digestsize(crypto_hash_cast(tfm)));

	/* wipe context */

	memset(ctx, 0, sizeof *ctx);

}

EXPORT_SYMBOL_GPL(s390_sha_final);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("s390 SHA cipher common functions");