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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: 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 19:50:20 +08:00 committed by Herbert Xu
parent 607424d858
commit 604973f1fe
5 changed files with 138 additions and 171 deletions
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4
arch/s390/crypto/Makefile
View File

@ -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

34
arch/s390/crypto/sha.h Normal file
View File

@ -0,0 +1,34 @@
/*
* 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

91
arch/s390/crypto/sha1_s390.c
View File

@ -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");

90
arch/s390/crypto/sha256_s390.c
View File

@ -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");

90
arch/s390/crypto/sha_common.c Normal file
View File

@ -0,0 +1,90 @@
/*
* 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");