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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This code is made available to you under your choice of the following sets
* of licensing terms:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/* Copyright 2015 Mozilla Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pkixutil.h"
namespace mozilla { namespace pkix {
Result
DigestSignedData(TrustDomain& trustDomain,
const der::SignedDataWithSignature& signedData,
/*out*/ uint8_t(&digestBuf)[MAX_DIGEST_SIZE_IN_BYTES],
/*out*/ der::PublicKeyAlgorithm& publicKeyAlg,
/*out*/ SignedDigest& signedDigest)
{
Reader signatureAlg(signedData.algorithm);
Result rv = der::SignatureAlgorithmIdentifierValue(
signatureAlg, publicKeyAlg, signedDigest.digestAlgorithm);
if (rv != Success) {
return rv;
}
if (!signatureAlg.AtEnd()) {
return Result::ERROR_BAD_DER;
}
size_t digestLen;
switch (signedDigest.digestAlgorithm) {
case DigestAlgorithm::sha512: digestLen = 512 / 8; break;
case DigestAlgorithm::sha384: digestLen = 384 / 8; break;
case DigestAlgorithm::sha256: digestLen = 256 / 8; break;
case DigestAlgorithm::sha1: digestLen = 160 / 8; break;
MOZILLA_PKIX_UNREACHABLE_DEFAULT_ENUM
}
assert(digestLen <= sizeof(digestBuf));
rv = trustDomain.DigestBuf(signedData.data, signedDigest.digestAlgorithm,
digestBuf, digestLen);
if (rv != Success) {
return rv;
}
rv = signedDigest.digest.Init(digestBuf, digestLen);
if (rv != Success) {
return rv;
}
return signedDigest.signature.Init(signedData.signature);
}
Result
VerifySignedDigest(TrustDomain& trustDomain,
der::PublicKeyAlgorithm publicKeyAlg,
const SignedDigest& signedDigest,
Input signerSubjectPublicKeyInfo)
{
switch (publicKeyAlg) {
case der::PublicKeyAlgorithm::ECDSA:
return trustDomain.VerifyECDSASignedDigest(signedDigest,
signerSubjectPublicKeyInfo);
case der::PublicKeyAlgorithm::RSA_PKCS1:
return trustDomain.VerifyRSAPKCS1SignedDigest(signedDigest,
signerSubjectPublicKeyInfo);
MOZILLA_PKIX_UNREACHABLE_DEFAULT_ENUM
}
}
Result
VerifySignedData(TrustDomain& trustDomain,
const der::SignedDataWithSignature& signedData,
Input signerSubjectPublicKeyInfo)
{
uint8_t digestBuf[MAX_DIGEST_SIZE_IN_BYTES];
der::PublicKeyAlgorithm publicKeyAlg;
SignedDigest signedDigest;
Result rv = DigestSignedData(trustDomain, signedData, digestBuf,
publicKeyAlg, signedDigest);
if (rv != Success) {
return rv;
}
return VerifySignedDigest(trustDomain, publicKeyAlg, signedDigest,
signerSubjectPublicKeyInfo);
}
} } // namespace mozilla::pkix
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