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authorHerbert Xu <herbert@gondor.apana.org.au>2015-01-16 19:38:17 +1100
committerHerbert Xu <herbert@gondor.apana.org.au>2015-01-20 14:44:15 +1100
commit988dc0174411ad4b98c173f3d7d25aca9e56cd85 (patch)
tree0643382e2d446d1bc46808f569a0e0ec301d2d3a /crypto
parent3eda71676bd9d396775c41a8b0f91357b1302cd5 (diff)
crypto: cts - Weed out non-CBC algorithms
The cts algorithm as currently implemented assumes the underlying is a CBC-mode algorithm. So this patch adds a check for that to eliminate bogus combinations of cts with non-CBC modes. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/cts.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/crypto/cts.c b/crypto/cts.c
index 6a8089c4d4b4..e467ec0acf9f 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -290,6 +290,9 @@ static struct crypto_instance *crypto_cts_alloc(struct rtattr **tb)
if (!is_power_of_2(alg->cra_blocksize))
goto out_put_alg;
+ if (strncmp(alg->cra_name, "cbc(", 4))
+ goto out_put_alg;
+
inst = crypto_alloc_instance("cts", alg);
if (IS_ERR(inst))
goto out_put_alg;

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