[CRYPTO] Check cra_alignmask against cra_blocksize
Herbert Xu [Mon, 3 Oct 2005 05:15:36 +0000 (15:15 +1000)]
The cipher code relies on the fact that the block size is a multiple
of the required alignment.  So we should check this at the time of
algorith registration.  We also ensure that the block size is bounded
by the page size.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/api.c

index 959c4e5..40ae42e 100644 (file)
@@ -215,7 +215,10 @@ int crypto_register_alg(struct crypto_alg *alg)
        if (alg->cra_alignmask & (alg->cra_alignmask + 1))
                return -EINVAL;
 
-       if (alg->cra_alignmask > PAGE_SIZE)
+       if (alg->cra_alignmask & alg->cra_blocksize)
+               return -EINVAL;
+
+       if (alg->cra_blocksize > PAGE_SIZE)
                return -EINVAL;
        
        down_write(&crypto_alg_sem);