From: Herbert Xu <herbert@gondor.apana.org.au>
To: Fruhwirth Clemens <clemens@endorphin.org>
Cc: James Morris <jmorris@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
cryptoapi@lists.logix.cz, linux-crypto@vger.kernel.org
Subject: [7/*] [CRYPTO] Kill obsolete iv check in cbc_process()
Date: Tue, 22 Mar 2005 22:22:31 +1100 [thread overview]
Message-ID: <20050322112231.GA7224@gondor.apana.org.au> (raw)
In-Reply-To: <20050321094047.GA23084@gondor.apana.org.au>
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Hi:
Here's some more optimisations plus a bug fix for a pathological case
where in_place might not be set correctly which can't happen with any
of the current users. Here is the first one:
We have long since stopped using a null cit_iv as a means of doing null
encryption. In fact it doesn't work here anyway since we need to copy
src into dst to achieve null encryption.
No user of cbc_encrypt_iv/cbc_decrypt_iv does this either so let's just
get rid of this check which is sitting in the fast path.
Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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===== cipher.c 1.24 vs edited =====
--- 1.24/crypto/cipher.c 2005-03-21 18:41:41 +11:00
+++ edited/cipher.c 2005-03-22 21:28:00 +11:00
@@ -145,11 +145,7 @@
cryptfn_t fn, int enc, void *info)
{
u8 *iv = info;
-
- /* Null encryption */
- if (!iv)
- return;
-
+
if (enc) {
tfm->crt_u.cipher.cit_xor_block(iv, src);
fn(crypto_tfm_ctx(tfm), dst, iv);
next prev parent reply other threads:[~2005-03-22 11:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-21 9:40 [0/5] [CRYPTO] Speed up crypt() Herbert Xu
2005-03-21 9:48 ` [1/5] [CRYPTO] Do scatterwalk_whichbuf inline Herbert Xu
2005-03-21 9:49 ` [2/5] [CRYPTO] Handle in_place flag in crypt() Herbert Xu
2005-03-21 9:50 ` [3/5] [CRYPTO] Split src/dst handling out from crypt() Herbert Xu
2005-03-21 9:52 ` [4/5] [CRYPTO] Eliminate most calls to scatterwalk_copychunks " Herbert Xu
2005-03-21 9:53 ` [5/5] [CRYPTO] Optimise kmap calls in crypt() Herbert Xu
2005-03-21 11:30 ` Fruhwirth Clemens
2005-03-22 1:13 ` Herbert Xu
2005-03-22 10:24 ` Fruhwirth Clemens
2005-03-22 11:22 ` Herbert Xu [this message]
2005-03-22 11:24 ` [8/*] [CRYPTO] Split cbc_process into encrypt/decrypt Herbert Xu
2005-03-22 11:25 ` [9/*] [CRYPTO] Remap when walk_out crosses page in crypt() Herbert Xu
2005-03-23 20:17 ` David S. Miller
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