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authorLinus Torvalds <torvalds@linux-foundation.org>2015-05-22 14:26:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-05-22 14:26:36 -0700
commit2a058f388db8f2bf83ed43f6170a2bb79567dedb (patch)
tree6d20da1081029e71d72c287249f037638eb9b17e /arch/s390
parent865d872280c848dc78b060088171724c3fb98bbb (diff)
parenta1cae34e23b1293eccbcc8ee9b39298039c3952a (diff)
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.
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/crypto/ghash_s390.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/arch/s390/crypto/ghash_s390.c b/arch/s390/crypto/ghash_s390.c
index 7940dc90e80b..b258110da952 100644
--- a/arch/s390/crypto/ghash_s390.c
+++ b/arch/s390/crypto/ghash_s390.c
@@ -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;
}