1f6a9ab05a
This file does not contain any modular related function calls. So get rid of module.h since it drags in a lot of other headers and adds to the preprocessing load. It does export some symbols though, so we'll need to ensure it has export.h present instead. Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* Signature verification with an asymmetric key
|
|
*
|
|
* See Documentation/security/asymmetric-keys.txt
|
|
*
|
|
* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "SIG: "fmt
|
|
#include <keys/asymmetric-subtype.h>
|
|
#include <linux/export.h>
|
|
#include <linux/err.h>
|
|
#include <crypto/public_key.h>
|
|
#include "asymmetric_keys.h"
|
|
|
|
/**
|
|
* verify_signature - Initiate the use of an asymmetric key to verify a signature
|
|
* @key: The asymmetric key to verify against
|
|
* @sig: The signature to check
|
|
*
|
|
* Returns 0 if successful or else an error.
|
|
*/
|
|
int verify_signature(const struct key *key,
|
|
const struct public_key_signature *sig)
|
|
{
|
|
const struct asymmetric_key_subtype *subtype;
|
|
int ret;
|
|
|
|
pr_devel("==>%s()\n", __func__);
|
|
|
|
if (key->type != &key_type_asymmetric)
|
|
return -EINVAL;
|
|
subtype = asymmetric_key_subtype(key);
|
|
if (!subtype ||
|
|
!key->payload.data[0])
|
|
return -EINVAL;
|
|
if (!subtype->verify_signature)
|
|
return -ENOTSUPP;
|
|
|
|
ret = subtype->verify_signature(key, sig);
|
|
|
|
pr_devel("<==%s() = %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(verify_signature);
|