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Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  [CRYPTO] hmac: Avoid calling virt_to_page on key
This commit is contained in:
Linus Torvalds 2008-05-09 08:07:21 -07:00
parent d9a9a23ff2 67412f0e78
commit c20b4b69f7
1 changed files with 23 additions and 2 deletions
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25
crypto/hmac.c
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@ -57,14 +57,35 @@ static int hmac_setkey(struct crypto_hash *parent,
if (keylen > bs) {
struct hash_desc desc;
struct scatterlist tmp;
int tmplen;
int err;
desc.tfm = tfm;
desc.flags = crypto_hash_get_flags(parent);
desc.flags &= CRYPTO_TFM_REQ_MAY_SLEEP;
sg_init_one(&tmp, inkey, keylen);
err = crypto_hash_digest(&desc, &tmp, keylen, digest);
err = crypto_hash_init(&desc);
if (err)
return err;
tmplen = bs * 2 + ds;
sg_init_one(&tmp, ipad, tmplen);
for (; keylen > tmplen; inkey += tmplen, keylen -= tmplen) {
memcpy(ipad, inkey, tmplen);
err = crypto_hash_update(&desc, &tmp, tmplen);
if (err)
return err;
}
if (keylen) {
memcpy(ipad, inkey, keylen);
err = crypto_hash_update(&desc, &tmp, keylen);
if (err)
return err;
}
err = crypto_hash_final(&desc, digest);
if (err)
return err;