1 files changed, 145 insertions, 0 deletions
diff --git a/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CTROpenSSL.cpp b/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CTROpenSSL.cpp
new file mode 100644
index 000000000..ca2f9b559
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+++ b/src/bun.js/bindings/webcrypto/CryptoAlgorithmAES_CTROpenSSL.cpp
@@ -0,0 +1,145 @@
+/*
+ * 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_CTR.h"
+
+#if ENABLE(WEB_CRYPTO)
+
+#include "CryptoAlgorithmAesCtrParams.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_ctr();
+
+    if (keySize * 8 == 192)
+        return EVP_aes_192_ctr();
+
+    if (keySize * 8 == 256)
+        return EVP_aes_256_ctr();
+
+    return nullptr;
+}
+
+static std::optional<Vector<uint8_t>> crypt(int operation, const Vector<uint8_t>& key, const Vector<uint8_t>& counter, size_t counterLength, const Vector<uint8_t>& inputText)
+{
+    constexpr size_t blockSize = 16;
+    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;
+
+    const size_t blocks = roundUpToMultipleOf(blockSize, inputText.size()) / blockSize;
+
+    // Detect loop
+    if (counterLength < sizeof(size_t) * 8 && blocks > ((size_t)1 << counterLength))
+        return std::nullopt;
+
+    // Calculate capacity before overflow
+    CryptoAlgorithmAES_CTR::CounterBlockHelper counterBlockHelper(counter, counterLength);
+    size_t capacity = counterBlockHelper.countToOverflowSaturating();
+
+    // Divide data into two parts if necessary
+    size_t headSize = inputText.size();
+    if (capacity < blocks)
+        headSize = capacity * blockSize;
+
+    Vector<uint8_t> outputText(inputText.size());
+    // First part
+    {
+        // Initialize the encryption(decryption) operation
+        if (1 != EVP_CipherInit_ex(ctx.get(), algorithm, nullptr, key.data(), counter.data(), operation))
+            return std::nullopt;
+
+        // Disable padding
+        if (1 != EVP_CIPHER_CTX_set_padding(ctx.get(), 0))
+            return std::nullopt;
+
+        // Provide the message to be encrypted(decrypted), and obtain the encrypted(decrypted) output
+        if (1 != EVP_CipherUpdate(ctx.get(), outputText.data(), &len, inputText.data(), headSize))
+            return std::nullopt;
+
+        // Finalize the encryption(decryption)
+        if (1 != EVP_CipherFinal_ex(ctx.get(), outputText.data() + len, &len))
+            return std::nullopt;
+    }
+
+    // Sedond part
+    if (capacity < blocks) {
+        size_t tailSize = inputText.size() - headSize;
+
+        Vector<uint8_t> remainingCounter = counterBlockHelper.counterVectorAfterOverflow();
+
+        // Initialize the encryption(decryption) operation
+        if (1 != EVP_CipherInit_ex(ctx.get(), algorithm, nullptr, key.data(), remainingCounter.data(), operation))
+            return std::nullopt;
+
+        // Disable padding
+        if (1 != EVP_CIPHER_CTX_set_padding(ctx.get(), 0))
+            return std::nullopt;
+
+        // Provide the message to be encrypted(decrypted), and obtain the encrypted(decrypted) output
+        if (1 != EVP_CipherUpdate(ctx.get(), outputText.data() + headSize, &len, inputText.data() + headSize, tailSize))
+            return std::nullopt;
+
+        // Finalize the encryption(decryption)
+        if (1 != EVP_CipherFinal_ex(ctx.get(), outputText.data() + headSize + len, &len))
+            return std::nullopt;
+    }
+
+    return outputText;
+}
+
+ExceptionOr<Vector<uint8_t>> CryptoAlgorithmAES_CTR::platformEncrypt(const CryptoAlgorithmAesCtrParams& parameters, const CryptoKeyAES& key, const Vector<uint8_t>& plainText)
+{
+    auto output = crypt(1, key.key(), parameters.counterVector(), parameters.length, plainText);
+    if (!output)
+        return Exception { OperationError };
+    return WTFMove(*output);
+}
+
+ExceptionOr<Vector<uint8_t>> CryptoAlgorithmAES_CTR::platformDecrypt(const CryptoAlgorithmAesCtrParams& parameters, const CryptoKeyAES& key, const Vector<uint8_t>& cipherText)
+{
+    auto output = crypt(0, key.key(), parameters.counterVector(), parameters.length, cipherText);
+    if (!output)
+        return Exception { OperationError };
+    return WTFMove(*output);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_CRYPTO)