/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
+ * Copyright (C) 2017 Metrological Group B.V.
+ * Copyright (C) 2017 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#if ENABLE(SUBTLE_CRYPTO)
-#include "NotImplemented.h"
+#include "CryptoAlgorithmEcdsaParams.h"
+#include "CryptoKeyEC.h"
+#include "ExceptionCode.h"
+#include "GCryptUtilities.h"
+#include "ScriptExecutionContext.h"
+#include <pal/crypto/CryptoDigest.h>
namespace WebCore {
-void CryptoAlgorithmECDSA::platformSign(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&&, Vector<uint8_t>&&, VectorCallback&&, ExceptionCallback&&, ScriptExecutionContext&, WorkQueue&)
+static std::optional<Vector<uint8_t>> gcryptSign(gcry_sexp_t keySexp, const Vector<uint8_t>& data, CryptoAlgorithmIdentifier hashAlgorithmIdentifier, size_t keySizeInBytes)
{
- notImplemented();
+ // Perform digest operation with the specified algorithm on the given data.
+ Vector<uint8_t> dataHash;
+ {
+ auto digestAlgorithm = hashCryptoDigestAlgorithm(hashAlgorithmIdentifier);
+ if (!digestAlgorithm)
+ return std::nullopt;
+
+ auto digest = PAL::CryptoDigest::create(*digestAlgorithm);
+ if (!digest)
+ return std::nullopt;
+
+ digest->addBytes(data.data(), data.size());
+ dataHash = digest->computeHash();
+ }
+
+ // Construct the data s-expression that contains raw hashed data.
+ PAL::GCrypt::Handle<gcry_sexp_t> dataSexp;
+ {
+ auto shaAlgorithm = hashAlgorithmName(hashAlgorithmIdentifier);
+ if (!shaAlgorithm)
+ return std::nullopt;
+
+ gcry_error_t error = gcry_sexp_build(&dataSexp, nullptr, "(data(flags raw)(hash %s %b))",
+ *shaAlgorithm, dataHash.size(), dataHash.data());
+ if (error != GPG_ERR_NO_ERROR) {
+ PAL::GCrypt::logError(error);
+ return std::nullopt;
+ }
+ }
+
+ // Perform the PK signing, retrieving a sig-val s-expression of the following form:
+ // (sig-val
+ // (dsa
+ // (r r-mpi)
+ // (s s-mpi)))
+ PAL::GCrypt::Handle<gcry_sexp_t> signatureSexp;
+ gcry_error_t error = gcry_pk_sign(&signatureSexp, dataSexp, keySexp);
+ if (error != GPG_ERR_NO_ERROR) {
+ PAL::GCrypt::logError(error);
+ return std::nullopt;
+ }
+
+ // Retrieve MPI data of the resulting r and s integers. They are concatenated into
+ // a single buffer after checking that the data length matches the key size.
+ // FIXME: But r and s integers can still be valid even if they're of shorter size.
+ // https://bugs.webkit.org/show_bug.cgi?id=171535
+ Vector<uint8_t> signature;
+ {
+ PAL::GCrypt::Handle<gcry_sexp_t> rSexp(gcry_sexp_find_token(signatureSexp, "r", 0));
+ if (!rSexp)
+ return std::nullopt;
+
+ auto rData = mpiData(rSexp);
+ if (!rData || rData->size() != keySizeInBytes)
+ return std::nullopt;
+
+ signature.appendVector(*rData);
+ }
+ {
+ PAL::GCrypt::Handle<gcry_sexp_t> sSexp(gcry_sexp_find_token(signatureSexp, "s", 0));
+ if (!sSexp)
+ return std::nullopt;
+
+ auto sData = mpiData(sSexp);
+ if (!sData || sData->size() != keySizeInBytes)
+ return std::nullopt;
+
+ signature.appendVector(*sData);
+ }
+
+ return signature;
+}
+
+static std::optional<bool> gcryptVerify(gcry_sexp_t keySexp, const Vector<uint8_t>& signature, const Vector<uint8_t>& data, CryptoAlgorithmIdentifier hashAlgorithmIdentifier, size_t keySizeInBytes)
+{
+ // Bail if the signature size isn't double the key size (i.e. concatenated r and s components).
+ if (signature.size() != keySizeInBytes * 2)
+ return false;
+
+ // Perform digest operation with the specified algorithm on the given data.
+ Vector<uint8_t> dataHash;
+ {
+ auto digestAlgorithm = hashCryptoDigestAlgorithm(hashAlgorithmIdentifier);
+ if (!digestAlgorithm)
+ return std::nullopt;
+
+ auto digest = PAL::CryptoDigest::create(*digestAlgorithm);
+ if (!digest)
+ return std::nullopt;
+
+ digest->addBytes(data.data(), data.size());
+ dataHash = digest->computeHash();
+ }
+
+ // Construct the sig-val s-expression, extracting the r and s components from the signature vector.
+ PAL::GCrypt::Handle<gcry_sexp_t> signatureSexp;
+ gcry_error_t error = gcry_sexp_build(&signatureSexp, nullptr, "(sig-val(ecdsa(r %b)(s %b)))",
+ keySizeInBytes, signature.data(), keySizeInBytes, signature.data() + keySizeInBytes);
+ if (error != GPG_ERR_NO_ERROR) {
+ PAL::GCrypt::logError(error);
+ return std::nullopt;
+ }
+
+ // Construct the data s-expression that contains raw hashed data.
+ PAL::GCrypt::Handle<gcry_sexp_t> dataSexp;
+ {
+ auto shaAlgorithm = hashAlgorithmName(hashAlgorithmIdentifier);
+ if (!shaAlgorithm)
+ return std::nullopt;
+
+ error = gcry_sexp_build(&dataSexp, nullptr, "(data(flags raw)(hash %s %b))",
+ *shaAlgorithm, dataHash.size(), dataHash.data());
+ if (error != GPG_ERR_NO_ERROR) {
+ PAL::GCrypt::logError(error);
+ return std::nullopt;
+ }
+ }
+
+ // Perform the PK verification. We report success if there's no error returned, or
+ // a failure in any other case. OperationError should not be returned at this point,
+ // avoiding spilling information about the exact cause of verification failure.
+ error = gcry_pk_verify(signatureSexp, dataSexp, keySexp);
+ return { error == GPG_ERR_NO_ERROR };
}
-void CryptoAlgorithmECDSA::platformVerify(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&&, Vector<uint8_t>&&, Vector<uint8_t>&&, BoolCallback&&, ExceptionCallback&&, ScriptExecutionContext&, WorkQueue&)
+void CryptoAlgorithmECDSA::platformSign(std::unique_ptr<CryptoAlgorithmParameters>&& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& data, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
- notImplemented();
+ context.ref();
+ workQueue.dispatch(
+ [parameters = WTFMove(parameters), key = WTFMove(key), data = WTFMove(data), callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback), &context]() mutable {
+ auto& ecKey = downcast<CryptoKeyEC>(key.get());
+ auto& ecParameters = downcast<CryptoAlgorithmEcdsaParams>(*parameters);
+
+ auto output = gcryptSign(ecKey.platformKey(), data, ecParameters.hashIdentifier, ecKey.keySizeInBits() / 8);
+ if (!output) {
+ // We should only dereference callbacks after being back to the Document/Worker threads.
+ context.postTask(
+ [callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback)](ScriptExecutionContext& context) {
+ exceptionCallback(OperationError);
+ context.deref();
+ });
+ return;
+ }
+
+ // We should only dereference callbacks after being back to the Document/Worker threads.
+ context.postTask(
+ [output = WTFMove(*output), callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback)](ScriptExecutionContext& context) {
+ callback(output);
+ context.deref();
+ });
+ });
+}
+
+void CryptoAlgorithmECDSA::platformVerify(std::unique_ptr<CryptoAlgorithmParameters>&& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& signature, Vector<uint8_t>&& data, BoolCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
+{
+ context.ref();
+ workQueue.dispatch(
+ [parameters = WTFMove(parameters), key = WTFMove(key), signature = WTFMove(signature), data = WTFMove(data), callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback), &context]() mutable {
+ auto& ecKey = downcast<CryptoKeyEC>(key.get());
+ auto& ecParameters = downcast<CryptoAlgorithmEcdsaParams>(*parameters);
+
+ auto output = gcryptVerify(ecKey.platformKey(), signature, data, ecParameters.hashIdentifier, ecKey.keySizeInBits() / 8);
+ if (!output) {
+ // We should only dereference callbacks after being back to the Document/Worker threads.
+ context.postTask(
+ [callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback)](ScriptExecutionContext& context) {
+ exceptionCallback(OperationError);
+ context.deref();
+ });
+ return;
+ }
+
+ // We should only dereference callbacks after being back to the Document/Worker threads.
+ context.postTask(
+ [output = WTFMove(*output), callback = WTFMove(callback), exceptionCallback = WTFMove(exceptionCallback)](ScriptExecutionContext& context) {
+ callback(output);
+ context.deref();
+ });
+ });
}
} // namespace WebCore
git://git.webkit.org / WebKit-https.git / blobdiff