From 76652ac3cad64dbc2fd54e976ce4bad0a37caa03 Mon Sep 17 00:00:00 2001
From: Jarred Sumner <jarred@jarredsumner.com>
Date: Sun, 23 Oct 2022 20:25:18 -0700
Subject: 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>
---
 src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp | 138 +++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp

(limited to 'src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp')

diff --git a/src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp b/src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp
new file mode 100644
index 000000000..2996cae2a
--- /dev/null
+++ b/src/bun.js/bindings/webcrypto/OpenSSLUtilities.cpp
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2021 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 "OpenSSLUtilities.h"
+
+#if ENABLE(WEB_CRYPTO)
+
+#include "OpenSSLCryptoUniquePtr.h"
+
+namespace WebCore {
+
+const EVP_MD* digestAlgorithm(CryptoAlgorithmIdentifier hashFunction)
+{
+    switch (hashFunction) {
+    case CryptoAlgorithmIdentifier::SHA_1:
+        return EVP_sha1();
+    case CryptoAlgorithmIdentifier::SHA_224:
+        return EVP_sha224();
+    case CryptoAlgorithmIdentifier::SHA_256:
+        return EVP_sha256();
+    case CryptoAlgorithmIdentifier::SHA_384:
+        return EVP_sha384();
+    case CryptoAlgorithmIdentifier::SHA_512:
+        return EVP_sha512();
+    default:
+        return nullptr;
+    }
+}
+
+std::optional<Vector<uint8_t>> calculateDigest(const EVP_MD* algorithm, const Vector<uint8_t>& message)
+{
+    EvpDigestCtxPtr ctx;
+    if (!(ctx = EvpDigestCtxPtr(EVP_MD_CTX_create())))
+        return std::nullopt;
+
+    int digestLength = EVP_MD_size(algorithm);
+    if (digestLength <= 0)
+        return std::nullopt;
+    Vector<uint8_t> digest(digestLength);
+
+    if (EVP_DigestInit_ex(ctx.get(), algorithm, nullptr) != 1)
+        return std::nullopt;
+
+    if (EVP_DigestUpdate(ctx.get(), message.data(), message.size()) != 1)
+        return std::nullopt;
+
+    if (EVP_DigestFinal_ex(ctx.get(), digest.data(), nullptr) != 1)
+        return std::nullopt;
+
+    return digest;
+}
+
+Vector<uint8_t> convertToBytes(const BIGNUM* bignum)
+{
+    Vector<uint8_t> bytes(BN_num_bytes(bignum));
+    BN_bn2bin(bignum, bytes.data());
+    return bytes;
+}
+
+Vector<uint8_t> convertToBytesExpand(const BIGNUM* bignum, size_t minimumBufferSize)
+{
+    int length = BN_num_bytes(bignum);
+    if (length < 0)
+        return { };
+
+    size_t bufferSize = std::max<size_t>(length, minimumBufferSize);
+
+    Vector<uint8_t> bytes(bufferSize);
+
+    size_t paddingLength = bufferSize - length;
+    if (paddingLength > 0) {
+        uint8_t padding = BN_is_negative(bignum) ? 0xFF : 0x00;
+        for (size_t i = 0; i < paddingLength; i++)
+            bytes[i] = padding;
+    }
+    BN_bn2bin(bignum, bytes.data() + paddingLength);
+    return bytes;
+}
+
+BIGNUMPtr convertToBigNumber(const Vector<uint8_t>& bytes)
+{
+    return BIGNUMPtr(BN_bin2bn(bytes.data(), bytes.size(), nullptr));
+}
+
+bool AESKey::setKey(const Vector<uint8_t>& key, int enc)
+{
+    size_t keySize = key.size() * 8;
+    if (keySize != 128 && keySize != 192 && keySize != 256)
+        return false;
+
+    if (enc == AES_ENCRYPT) {
+        if (AES_set_encrypt_key(key.data(), keySize, &m_key) < 0)
+            return false;
+        return true;
+    }
+
+    if (enc == AES_DECRYPT) {
+        if (AES_set_decrypt_key(key.data(), keySize, &m_key) < 0)
+            return false;
+        return true;
+    }
+
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+AESKey::~AESKey()
+{
+    memset(&m_key, 0, sizeof m_key);
+}
+
+} // namespace WebCore
+
+
+#endif // ENABLE(WEB_CRYPTO)
-- 
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