mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 06:24:53 +08:00
0398d4ab16
s390_crypto_shash_parmsize() return type is int, it
should not be stored in a unsigned variable, which
compared with zero.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 3c2eb6b76c ("s390/crypto: Support for SHA3 via CPACF (MSA6)")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Joerg Schmidbauer <jschmidb@linux.vnet.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Cryptographic API.
|
|
*
|
|
* s390 generic implementation of the SHA Secure Hash Algorithms.
|
|
*
|
|
* Copyright IBM Corp. 2007
|
|
* Author(s): Jan Glauber (jang@de.ibm.com)
|
|
*/
|
|
|
|
#include <crypto/internal/hash.h>
|
|
#include <linux/module.h>
|
|
#include <asm/cpacf.h>
|
|
#include "sha.h"
|
|
|
|
int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len)
|
|
{
|
|
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
|
|
unsigned int bsize = crypto_shash_blocksize(desc->tfm);
|
|
unsigned int index, n;
|
|
|
|
/* how much is already in the buffer? */
|
|
index = ctx->count % bsize;
|
|
ctx->count += len;
|
|
|
|
if ((index + len) < bsize)
|
|
goto store;
|
|
|
|
/* process one stored block */
|
|
if (index) {
|
|
memcpy(ctx->buf + index, data, bsize - index);
|
|
cpacf_kimd(ctx->func, ctx->state, ctx->buf, bsize);
|
|
data += bsize - index;
|
|
len -= bsize - index;
|
|
index = 0;
|
|
}
|
|
|
|
/* process as many blocks as possible */
|
|
if (len >= bsize) {
|
|
n = (len / bsize) * bsize;
|
|
cpacf_kimd(ctx->func, ctx->state, data, n);
|
|
data += n;
|
|
len -= n;
|
|
}
|
|
store:
|
|
if (len)
|
|
memcpy(ctx->buf + index , data, len);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s390_sha_update);
|
|
|
|
static int s390_crypto_shash_parmsize(int func)
|
|
{
|
|
switch (func) {
|
|
case CPACF_KLMD_SHA_1:
|
|
return 20;
|
|
case CPACF_KLMD_SHA_256:
|
|
return 32;
|
|
case CPACF_KLMD_SHA_512:
|
|
return 64;
|
|
case CPACF_KLMD_SHA3_224:
|
|
case CPACF_KLMD_SHA3_256:
|
|
case CPACF_KLMD_SHA3_384:
|
|
case CPACF_KLMD_SHA3_512:
|
|
return 200;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int s390_sha_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
|
|
unsigned int bsize = crypto_shash_blocksize(desc->tfm);
|
|
u64 bits;
|
|
unsigned int n;
|
|
int mbl_offset;
|
|
|
|
n = ctx->count % bsize;
|
|
bits = ctx->count * 8;
|
|
mbl_offset = s390_crypto_shash_parmsize(ctx->func);
|
|
if (mbl_offset < 0)
|
|
return -EINVAL;
|
|
|
|
mbl_offset = mbl_offset / sizeof(u32);
|
|
|
|
/* set total msg bit length (mbl) in CPACF parmblock */
|
|
switch (ctx->func) {
|
|
case CPACF_KLMD_SHA_1:
|
|
case CPACF_KLMD_SHA_256:
|
|
memcpy(ctx->state + mbl_offset, &bits, sizeof(bits));
|
|
break;
|
|
case CPACF_KLMD_SHA_512:
|
|
/*
|
|
* the SHA512 parmblock has a 128-bit mbl field, clear
|
|
* high-order u64 field, copy bits to low-order u64 field
|
|
*/
|
|
memset(ctx->state + mbl_offset, 0x00, sizeof(bits));
|
|
mbl_offset += sizeof(u64) / sizeof(u32);
|
|
memcpy(ctx->state + mbl_offset, &bits, sizeof(bits));
|
|
break;
|
|
case CPACF_KLMD_SHA3_224:
|
|
case CPACF_KLMD_SHA3_256:
|
|
case CPACF_KLMD_SHA3_384:
|
|
case CPACF_KLMD_SHA3_512:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
cpacf_klmd(ctx->func, ctx->state, ctx->buf, n);
|
|
|
|
/* copy digest to out */
|
|
memcpy(out, ctx->state, crypto_shash_digestsize(desc->tfm));
|
|
/* wipe context */
|
|
memset(ctx, 0, sizeof *ctx);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s390_sha_final);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("s390 SHA cipher common functions");
|