Commit 1b40efd7 authored Oct 03, 2005 by Herbert Xu

[CRYPTO] Check cra_alignmask against cra_blocksize



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>

parent 6df5b9f4

crypto/api.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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);