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[CRYPTO] Check cra_alignmask against cra_blocksize

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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 <[email protected]>
This commit is contained in:
Herbert Xu 2005-10-03 15:15:36 +10:00
commit 1b40efd772
1 changed files with 4 additions and 1 deletions
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5
crypto/api.c
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@ -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);