1 files changed, 138 insertions, 0 deletions
diff --git a/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CBCOpenSSL.cpp b/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CBCOpenSSL.cpp
new file mode 100644
index 000000000..c271c067f
--- /dev/null
+++ b/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CBCOpenSSL.cpp
@@ -0,0 +1,138 @@
+/*
+ * 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 "CryptoAlgorithmAES_CBC.h"
+
+#if ENABLE(WEB_CRYPTO)
+
+#include "CryptoAlgorithmAesCbcCfbParams.h"
+#include "CryptoKeyAES.h"
+#include "OpenSSLCryptoUniquePtr.h"
+#include <openssl/evp.h>
+
+namespace WebCore {
+
+static const EVP_CIPHER* aesAlgorithm(size_t keySize)
+{
+    if (keySize * 8 == 128)
+        return EVP_aes_128_cbc();
+
+    if (keySize * 8 == 192)
+        return EVP_aes_192_cbc();
+
+    if (keySize * 8 == 256)
+        return EVP_aes_256_cbc();
+
+    return nullptr;
+}
+
+static std::optional<Vector<uint8_t>> cryptEncrypt(const Vector<uint8_t>& key, const Vector<uint8_t>& iv, Vector<uint8_t>&& plainText)
+{
+    const EVP_CIPHER* algorithm = aesAlgorithm(key.size());
+    if (!algorithm)
+        return std::nullopt;
+
+    EvpCipherCtxPtr ctx;
+    int len;
+
+    // Create and initialize the context
+    if (!(ctx = EvpCipherCtxPtr(EVP_CIPHER_CTX_new())))
+        return std::nullopt;
+
+    size_t plainSize = plainText.size();
+    const size_t cipherTextLen = roundUpToMultipleOf(EVP_CIPHER_block_size(algorithm), plainSize + 1);
+    Vector<uint8_t> cipherText(cipherTextLen);
+
+    // Initialize the encryption operation
+    if (1 != EVP_EncryptInit_ex(ctx.get(), algorithm, nullptr, key.data(), iv.data()))
+        return std::nullopt;
+
+    // Provide the message to be encrypted, and obtain the encrypted output
+    if (1 != EVP_EncryptUpdate(ctx.get(), cipherText.data(), &len, plainText.data(), plainSize))
+        return std::nullopt;
+
+    // Finalize the encryption. Further ciphertext bytes may be written at this stage
+    if (1 != EVP_EncryptFinal_ex(ctx.get(), cipherText.data() + len, &len))
+        return std::nullopt;
+
+    return cipherText;
+}
+
+static std::optional<Vector<uint8_t>> cryptDecrypt(const Vector<uint8_t>& key, const Vector<uint8_t>& iv, const Vector<uint8_t>& cipherText)
+{
+    const EVP_CIPHER* algorithm = aesAlgorithm(key.size());
+    if (!algorithm)
+        return std::nullopt;
+
+    EvpCipherCtxPtr ctx;
+
+    size_t cipherSize = cipherText.size();
+    Vector<uint8_t> plainText(cipherSize);
+    int len;
+    int plainTextLen;
+
+    // Create and initialize the context
+    if (!(ctx = EvpCipherCtxPtr(EVP_CIPHER_CTX_new())))
+        return std::nullopt;
+
+    // Initialize the decryption operation
+    if (1 != EVP_DecryptInit_ex(ctx.get(), algorithm, nullptr, key.data(), iv.data()))
+        return std::nullopt;
+
+    // Provide the message to be decrypted, and obtain the plaintext output
+    if (1 != EVP_DecryptUpdate(ctx.get(), plainText.data(), &len, cipherText.data(), cipherSize))
+        return std::nullopt;
+    plainTextLen = len;
+
+    // Finalize the decryption. Further plaintext bytes may be written at this stage
+    if (1 != EVP_DecryptFinal_ex(ctx.get(), plainText.data() + len, &len))
+        return std::nullopt;
+    plainTextLen += len;
+
+    plainText.shrink(plainTextLen);
+
+    return plainText;
+}
+
+ExceptionOr<Vector<uint8_t>> CryptoAlgorithmAES_CBC::platformEncrypt(const CryptoAlgorithmAesCbcCfbParams& parameters, const CryptoKeyAES& key, const Vector<uint8_t>& plainText, Padding)
+{
+    auto output = cryptEncrypt(key.key(), parameters.ivVector(), Vector<uint8_t>(plainText));
+    if (!output)
+        return Exception { OperationError };
+    return WTFMove(*output);
+}
+
+ExceptionOr<Vector<uint8_t>> CryptoAlgorithmAES_CBC::platformDecrypt(const CryptoAlgorithmAesCbcCfbParams& parameters, const CryptoKeyAES& key, const Vector<uint8_t>& cipherText, Padding)
+{
+    auto output = cryptDecrypt(key.key(), parameters.ivVector(), cipherText);
+    if (!output)
+        return Exception { OperationError };
+    return WTFMove(*output);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_CRYPTO)