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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/child/webcrypto/webcrypto_impl.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "content/child/webcrypto/crypto_data.h"
#include "content/child/webcrypto/shared_crypto.h"
#include "content/child/webcrypto/status.h"
#include "content/child/webcrypto/webcrypto_util.h"
#include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h"
#include "third_party/WebKit/public/platform/WebString.h"
namespace content {
using webcrypto::Status;
namespace {
void CompleteWithError(const Status& status, blink::WebCryptoResult* result) {
DCHECK(status.IsError());
#if defined(WEBCRYPTO_HAS_ERROR_TYPE)
result->completeWithError(status.error_type(),
blink::WebString::fromUTF8(status.error_details()));
#else
// TODO(eroman): Delete once Blink changes have rolled into Chromium.
if (!status.error_details().empty())
result->completeWithError(
blink::WebString::fromUTF8(status.error_details()));
else
result->completeWithError();
#endif
}
bool IsAlgorithmAsymmetric(const blink::WebCryptoAlgorithm& algorithm) {
// TODO(padolph): include all other asymmetric algorithms once they are
// defined, e.g. EC and DH.
return (algorithm.id() == blink::WebCryptoAlgorithmIdRsaEsPkcs1v1_5 ||
algorithm.id() == blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5 ||
algorithm.id() == blink::WebCryptoAlgorithmIdRsaOaep);
}
} // namespace
WebCryptoImpl::WebCryptoImpl() { webcrypto::Init(); }
WebCryptoImpl::~WebCryptoImpl() {}
void WebCryptoImpl::encrypt(const blink::WebCryptoAlgorithm& algorithm,
const blink::WebCryptoKey& key,
const unsigned char* data,
unsigned int data_size,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
blink::WebArrayBuffer buffer;
Status status = webcrypto::Encrypt(
algorithm, key, webcrypto::CryptoData(data, data_size), &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::decrypt(const blink::WebCryptoAlgorithm& algorithm,
const blink::WebCryptoKey& key,
const unsigned char* data,
unsigned int data_size,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
blink::WebArrayBuffer buffer;
Status status = webcrypto::Decrypt(
algorithm, key, webcrypto::CryptoData(data, data_size), &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::digest(const blink::WebCryptoAlgorithm& algorithm,
const unsigned char* data,
unsigned int data_size,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
blink::WebArrayBuffer buffer;
Status status = webcrypto::Digest(
algorithm, webcrypto::CryptoData(data, data_size), &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::generateKey(const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usage_mask,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
if (IsAlgorithmAsymmetric(algorithm)) {
blink::WebCryptoKey public_key = blink::WebCryptoKey::createNull();
blink::WebCryptoKey private_key = blink::WebCryptoKey::createNull();
Status status = webcrypto::GenerateKeyPair(
algorithm, extractable, usage_mask, &public_key, &private_key);
if (status.IsError()) {
CompleteWithError(status, &result);
} else {
DCHECK(public_key.handle());
DCHECK(private_key.handle());
DCHECK_EQ(algorithm.id(), public_key.algorithm().id());
DCHECK_EQ(algorithm.id(), private_key.algorithm().id());
DCHECK_EQ(true, public_key.extractable());
DCHECK_EQ(extractable, private_key.extractable());
DCHECK_EQ(usage_mask, public_key.usages());
DCHECK_EQ(usage_mask, private_key.usages());
result.completeWithKeyPair(public_key, private_key);
}
} else {
blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
Status status =
webcrypto::GenerateSecretKey(algorithm, extractable, usage_mask, &key);
if (status.IsError()) {
CompleteWithError(status, &result);
} else {
DCHECK(key.handle());
DCHECK_EQ(algorithm.id(), key.algorithm().id());
DCHECK_EQ(extractable, key.extractable());
DCHECK_EQ(usage_mask, key.usages());
result.completeWithKey(key);
}
}
}
void WebCryptoImpl::importKey(blink::WebCryptoKeyFormat format,
const unsigned char* key_data,
unsigned int key_data_size,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usage_mask,
blink::WebCryptoResult result) {
blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
Status status =
webcrypto::ImportKey(format,
webcrypto::CryptoData(key_data, key_data_size),
algorithm,
extractable,
usage_mask,
&key);
if (status.IsError()) {
CompleteWithError(status, &result);
} else {
DCHECK(key.handle());
DCHECK(!key.algorithm().isNull());
DCHECK_EQ(extractable, key.extractable());
result.completeWithKey(key);
}
}
void WebCryptoImpl::exportKey(blink::WebCryptoKeyFormat format,
const blink::WebCryptoKey& key,
blink::WebCryptoResult result) {
blink::WebArrayBuffer buffer;
Status status = webcrypto::ExportKey(format, key, &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::sign(const blink::WebCryptoAlgorithm& algorithm,
const blink::WebCryptoKey& key,
const unsigned char* data,
unsigned int data_size,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
blink::WebArrayBuffer buffer;
Status status = webcrypto::Sign(
algorithm, key, webcrypto::CryptoData(data, data_size), &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::verifySignature(const blink::WebCryptoAlgorithm& algorithm,
const blink::WebCryptoKey& key,
const unsigned char* signature,
unsigned int signature_size,
const unsigned char* data,
unsigned int data_size,
blink::WebCryptoResult result) {
DCHECK(!algorithm.isNull());
bool signature_match = false;
Status status = webcrypto::VerifySignature(
algorithm,
key,
webcrypto::CryptoData(signature, signature_size),
webcrypto::CryptoData(data, data_size),
&signature_match);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBoolean(signature_match);
}
void WebCryptoImpl::wrapKey(blink::WebCryptoKeyFormat format,
const blink::WebCryptoKey& key,
const blink::WebCryptoKey& wrapping_key,
const blink::WebCryptoAlgorithm& wrap_algorithm,
blink::WebCryptoResult result) {
blink::WebArrayBuffer buffer;
// TODO(eroman): Use the same parameter ordering.
Status status = webcrypto::WrapKey(
format, wrapping_key, key, wrap_algorithm, &buffer);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithBuffer(buffer);
}
void WebCryptoImpl::unwrapKey(
blink::WebCryptoKeyFormat format,
const unsigned char* wrapped_key,
unsigned wrapped_key_size,
const blink::WebCryptoKey& wrapping_key,
const blink::WebCryptoAlgorithm& unwrap_algorithm,
const blink::WebCryptoAlgorithm& unwrapped_key_algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoResult result) {
blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
Status status =
webcrypto::UnwrapKey(format,
webcrypto::CryptoData(wrapped_key, wrapped_key_size),
wrapping_key,
unwrap_algorithm,
unwrapped_key_algorithm,
extractable,
usages,
&key);
if (status.IsError())
CompleteWithError(status, &result);
else
result.completeWithKey(key);
}
bool WebCryptoImpl::digestSynchronous(
const blink::WebCryptoAlgorithmId algorithm_id,
const unsigned char* data,
unsigned int data_size,
blink::WebArrayBuffer& result) {
blink::WebCryptoAlgorithm algorithm =
blink::WebCryptoAlgorithm::adoptParamsAndCreate(algorithm_id, NULL);
return (webcrypto::Digest(
algorithm, webcrypto::CryptoData(data, data_size), &result))
.IsSuccess();
}
blink::WebCryptoDigestor* WebCryptoImpl::createDigestor(
blink::WebCryptoAlgorithmId algorithm_id) {
return webcrypto::CreateDigestor(algorithm_id).release();
}
bool WebCryptoImpl::deserializeKeyForClone(
const blink::WebCryptoKeyAlgorithm& algorithm,
blink::WebCryptoKeyType type,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
const unsigned char* key_data,
unsigned key_data_size,
blink::WebCryptoKey& key) {
Status status = webcrypto::DeserializeKeyForClone(
algorithm,
type,
extractable,
usages,
webcrypto::CryptoData(key_data, key_data_size),
&key);
return status.IsSuccess();
}
bool WebCryptoImpl::serializeKeyForClone(
const blink::WebCryptoKey& key,
blink::WebVector<unsigned char>& key_data) {
Status status = webcrypto::SerializeKeyForClone(key, &key_data);
return status.IsSuccess();
}
} // namespace content
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