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WSL2-Linux-Kernel
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 

Pull another crypto fix from Herbert Xu:
 "Fix ICV corruption in s390/ghash when the same tfm is used by more
  than one thread"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: s390/ghash - Fix incorrect ghash icv buffer handling.
This commit is contained in:
Linus Torvalds 2015-05-22 14:26:36 -07:00
Родитель 865d872280 a1cae34e23
Коммит 2a058f388d
1 изменённых файлов: 13 добавлений и 12 удалений
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25
arch/s390/crypto/ghash_s390.c
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@ -16,11 +16,12 @@
#define GHASH_DIGEST_SIZE 16
struct ghash_ctx {
u8 icv[16];
u8 key[16];
u8 key[GHASH_BLOCK_SIZE];
};
struct ghash_desc_ctx {
u8 icv[GHASH_BLOCK_SIZE];
u8 key[GHASH_BLOCK_SIZE];
u8 buffer[GHASH_BLOCK_SIZE];
u32 bytes;
};
@ -28,8 +29,10 @@ struct ghash_desc_ctx {
static int ghash_init(struct shash_desc *desc)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
memset(dctx, 0, sizeof(*dctx));
memcpy(dctx->key, ctx->key, GHASH_BLOCK_SIZE);
return 0;
}
@ -45,7 +48,6 @@ static int ghash_setkey(struct crypto_shash *tfm,
}
memcpy(ctx->key, key, GHASH_BLOCK_SIZE);
memset(ctx->icv, 0, GHASH_BLOCK_SIZE);
return 0;
}
@ -54,7 +56,6 @@ static int ghash_update(struct shash_desc *desc,
const u8 *src, unsigned int srclen)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
unsigned int n;
u8 *buf = dctx->buffer;
int ret;
@ -70,7 +71,7 @@ static int ghash_update(struct shash_desc *desc,
src += n;
if (!dctx->bytes) {
ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf,
ret = crypt_s390_kimd(KIMD_GHASH, dctx, buf,
GHASH_BLOCK_SIZE);
if (ret != GHASH_BLOCK_SIZE)
return -EIO;
@ -79,7 +80,7 @@ static int ghash_update(struct shash_desc *desc,
n = srclen & ~(GHASH_BLOCK_SIZE - 1);
if (n) {
ret = crypt_s390_kimd(KIMD_GHASH, ctx, src, n);
ret = crypt_s390_kimd(KIMD_GHASH, dctx, src, n);
if (ret != n)
return -EIO;
src += n;
@ -94,7 +95,7 @@ static int ghash_update(struct shash_desc *desc,
return 0;
}
static int ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx)
static int ghash_flush(struct ghash_desc_ctx *dctx)
{
u8 *buf = dctx->buffer;
int ret;
@ -104,24 +105,24 @@ static int ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx)
memset(pos, 0, dctx->bytes);
ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf, GHASH_BLOCK_SIZE);
ret = crypt_s390_kimd(KIMD_GHASH, dctx, buf, GHASH_BLOCK_SIZE);
if (ret != GHASH_BLOCK_SIZE)
return -EIO;
dctx->bytes = 0;
}
dctx->bytes = 0;
return 0;
}
static int ghash_final(struct shash_desc *desc, u8 *dst)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
int ret;
ret = ghash_flush(ctx, dctx);
ret = ghash_flush(dctx);
if (!ret)
memcpy(dst, ctx->icv, GHASH_BLOCK_SIZE);
memcpy(dst, dctx->icv, GHASH_BLOCK_SIZE);
return ret;
}