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/*
* Copyright (C) 2014 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "public/platform/WebCryptoKeyAlgorithm.h"
#include "wtf/PtrUtil.h"
#include "wtf/ThreadSafeRefCounted.h"
#include <memory>
namespace blink {
// FIXME: Remove the need for this.
WebCryptoAlgorithm createHash(WebCryptoAlgorithmId hash) {
return WebCryptoAlgorithm::adoptParamsAndCreate(hash, 0);
}
class WebCryptoKeyAlgorithmPrivate
: public ThreadSafeRefCounted<WebCryptoKeyAlgorithmPrivate> {
public:
WebCryptoKeyAlgorithmPrivate(
WebCryptoAlgorithmId id,
std::unique_ptr<WebCryptoKeyAlgorithmParams> params)
: id(id), params(std::move(params)) {}
WebCryptoAlgorithmId id;
std::unique_ptr<WebCryptoKeyAlgorithmParams> params;
};
WebCryptoKeyAlgorithm::WebCryptoKeyAlgorithm(
WebCryptoAlgorithmId id,
std::unique_ptr<WebCryptoKeyAlgorithmParams> params)
: m_private(
adoptRef(new WebCryptoKeyAlgorithmPrivate(id, std::move(params)))) {}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::adoptParamsAndCreate(
WebCryptoAlgorithmId id,
WebCryptoKeyAlgorithmParams* params) {
return WebCryptoKeyAlgorithm(id, WTF::wrapUnique(params));
}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createAes(
WebCryptoAlgorithmId id,
unsigned short keyLengthBits) {
// FIXME: Verify that id is an AES algorithm.
// FIXME: Move this somewhere more general.
if (keyLengthBits != 128 && keyLengthBits != 192 && keyLengthBits != 256)
return WebCryptoKeyAlgorithm();
return WebCryptoKeyAlgorithm(
id, WTF::makeUnique<WebCryptoAesKeyAlgorithmParams>(keyLengthBits));
}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createHmac(
WebCryptoAlgorithmId hash,
unsigned keyLengthBits) {
if (!WebCryptoAlgorithm::isHash(hash))
return WebCryptoKeyAlgorithm();
return WebCryptoKeyAlgorithm(
WebCryptoAlgorithmIdHmac,
WTF::wrapUnique(new WebCryptoHmacKeyAlgorithmParams(createHash(hash),
keyLengthBits)));
}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createRsaHashed(
WebCryptoAlgorithmId id,
unsigned modulusLengthBits,
const unsigned char* publicExponent,
unsigned publicExponentSize,
WebCryptoAlgorithmId hash) {
// FIXME: Verify that id is an RSA algorithm which expects a hash
if (!WebCryptoAlgorithm::isHash(hash))
return WebCryptoKeyAlgorithm();
return WebCryptoKeyAlgorithm(
id, WTF::wrapUnique(new WebCryptoRsaHashedKeyAlgorithmParams(
modulusLengthBits, publicExponent, publicExponentSize,
createHash(hash))));
}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createEc(
WebCryptoAlgorithmId id,
WebCryptoNamedCurve namedCurve) {
return WebCryptoKeyAlgorithm(
id, WTF::makeUnique<WebCryptoEcKeyAlgorithmParams>(namedCurve));
}
WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createWithoutParams(
WebCryptoAlgorithmId id) {
if (!WebCryptoAlgorithm::isKdf(id))
return WebCryptoKeyAlgorithm();
return WebCryptoKeyAlgorithm(id, nullptr);
}
bool WebCryptoKeyAlgorithm::isNull() const {
return m_private.isNull();
}
WebCryptoAlgorithmId WebCryptoKeyAlgorithm::id() const {
ASSERT(!isNull());
return m_private->id;
}
WebCryptoKeyAlgorithmParamsType WebCryptoKeyAlgorithm::paramsType() const {
ASSERT(!isNull());
if (!m_private->params.get())
return WebCryptoKeyAlgorithmParamsTypeNone;
return m_private->params->type();
}
WebCryptoAesKeyAlgorithmParams* WebCryptoKeyAlgorithm::aesParams() const {
ASSERT(!isNull());
if (paramsType() == WebCryptoKeyAlgorithmParamsTypeAes)
return static_cast<WebCryptoAesKeyAlgorithmParams*>(
m_private->params.get());
return 0;
}
WebCryptoHmacKeyAlgorithmParams* WebCryptoKeyAlgorithm::hmacParams() const {
ASSERT(!isNull());
if (paramsType() == WebCryptoKeyAlgorithmParamsTypeHmac)
return static_cast<WebCryptoHmacKeyAlgorithmParams*>(
m_private->params.get());
return 0;
}
WebCryptoRsaHashedKeyAlgorithmParams* WebCryptoKeyAlgorithm::rsaHashedParams()
const {
ASSERT(!isNull());
if (paramsType() == WebCryptoKeyAlgorithmParamsTypeRsaHashed)
return static_cast<WebCryptoRsaHashedKeyAlgorithmParams*>(
m_private->params.get());
return 0;
}
WebCryptoEcKeyAlgorithmParams* WebCryptoKeyAlgorithm::ecParams() const {
ASSERT(!isNull());
if (paramsType() == WebCryptoKeyAlgorithmParamsTypeEc)
return static_cast<WebCryptoEcKeyAlgorithmParams*>(m_private->params.get());
return 0;
}
void WebCryptoKeyAlgorithm::writeToDictionary(
WebCryptoKeyAlgorithmDictionary* dict) const {
ASSERT(!isNull());
dict->setString("name", WebCryptoAlgorithm::lookupAlgorithmInfo(id())->name);
if (m_private->params.get())
m_private->params.get()->writeToDictionary(dict);
}
void WebCryptoKeyAlgorithm::assign(const WebCryptoKeyAlgorithm& other) {
m_private = other.m_private;
}
void WebCryptoKeyAlgorithm::reset() {
m_private.reset();
}
} // namespace blink
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