diff options
author | Eric Biggers <ebiggers@google.com> | 2018-06-18 10:22:37 -0700 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-07-01 21:00:41 +0800 |
commit | f0e8378df7c626e499d3de9f0143db1f4275309c (patch) | |
tree | 6c3fe0d20715c35329dd81a63448e073d3425e0d | |
parent | 536fc65f48aabba6c4ef950e10765a835ba1a5d0 (diff) | |
download | linux-crypto-f0e8378df7c626e499d3de9f0143db1f4275309c.tar.gz linux-crypto-f0e8378df7c626e499d3de9f0143db1f4275309c.zip |
crypto: vmac - require a block cipher with 128-bit block size
The VMAC template assumes the block cipher has a 128-bit block size, but
it failed to check for that. Thus it was possible to instantiate it
using a 64-bit block size cipher, e.g. "vmac(cast5)", causing
uninitialized memory to be used.
Add the needed check when instantiating the template.
Fixes: 894b82d8e942 ("crypto: vmac - New hash algorithm for intel_txt support")
Cc: <stable@vger.kernel.org> # v2.6.32+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r-- | crypto/vmac.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/vmac.c b/crypto/vmac.c index df76a816..3034454a 100644 --- a/crypto/vmac.c +++ b/crypto/vmac.c @@ -655,6 +655,10 @@ static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb) if (IS_ERR(alg)) return PTR_ERR(alg); + err = -EINVAL; + if (alg->cra_blocksize != 16) + goto out_put_alg; + inst = shash_alloc_instance("vmac", alg); err = PTR_ERR(inst); if (IS_ERR(inst)) |