Add Web Crypto API (#1384)

* Add Web Crypto API

* Duplicate symbols

* Update c_cpp_properties.json

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/bun.js/bindings/webcrypto/CryptoAlgorithmHMACOpenSSL.cpp b/src/bun.js/bindings/webcrypto/CryptoAlgorithmHMACOpenSSL.cpp
new file mode 100644
index 000000000..ad35cafe5
--- /dev/null
+++ b/src/bun.js/bindings/webcrypto/CryptoAlgorithmHMACOpenSSL.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2020 Sony Interactive Entertainment Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "config.h"
+#include "CryptoAlgorithmHMAC.h"
+
+#if ENABLE(WEB_CRYPTO)
+
+#include "CryptoKeyHMAC.h"
+#include "OpenSSLCryptoUniquePtr.h"
+#include "OpenSSLUtilities.h"
+#include <openssl/evp.h>
+#include <wtf/CryptographicUtilities.h>
+
+namespace WebCore {
+
+static std::optional<Vector<uint8_t>> calculateSignature(const EVP_MD* algorithm, const Vector<uint8_t>& key, const uint8_t* data, size_t dataLength)
+{
+    HMACCtxPtr ctx;
+    if (!(ctx = HMACCtxPtr(HMAC_CTX_new())))
+        return std::nullopt;
+
+    if (1 != HMAC_Init_ex(ctx.get(), key.data(), key.size(), algorithm, nullptr))
+        return std::nullopt;
+
+    // Call update with the message
+    if (1 != HMAC_Update(ctx.get(), data, dataLength))
+        return std::nullopt;
+
+    // Finalize the DigestSign operation
+    Vector<uint8_t> cipherText(EVP_MAX_MD_SIZE);
+    unsigned len = 0;
+    if (1 != HMAC_Final(ctx.get(), cipherText.data(), &len))
+        return std::nullopt;
+
+    cipherText.shrink(len);
+    return cipherText;
+}
+
+ExceptionOr<Vector<uint8_t>> CryptoAlgorithmHMAC::platformSign(const CryptoKeyHMAC& key, const Vector<uint8_t>& data)
+{
+    auto algorithm = digestAlgorithm(key.hashAlgorithmIdentifier());
+    if (!algorithm)
+        return Exception { OperationError };
+
+    auto result = calculateSignature(algorithm, key.key(), data.data(), data.size());
+    if (!result)
+        return Exception { OperationError };
+    return WTFMove(*result);
+}
+
+ExceptionOr<bool> CryptoAlgorithmHMAC::platformVerify(const CryptoKeyHMAC& key, const Vector<uint8_t>& signature, const Vector<uint8_t>& data)
+{
+    auto algorithm = digestAlgorithm(key.hashAlgorithmIdentifier());
+    if (!algorithm)
+        return Exception { OperationError };
+
+    auto expectedSignature = calculateSignature(algorithm, key.key(), data.data(), data.size());
+    if (!expectedSignature)
+        return Exception { OperationError };
+    // Using a constant time comparison to prevent timing attacks.
+    return signature.size() == expectedSignature->size() && !constantTimeMemcmp(expectedSignature->data(), signature.data(), expectedSignature->size());
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_CRYPTO)