Method decrypt

flow/StreamCipher.cpp:155–163

}

StringRef DecryptionStreamCipher::decrypt(unsigned char const* ciphertext, int len, Arena& arena) {
	CODE_PROBE(true, "Decrypting data with StreamCipher");
	auto plaintext = new (arena) unsigned char[len];
	int bytesDecrypted{ 0 };
	EVP_DecryptUpdate(cipher.getCtx(), plaintext, &bytesDecrypted, ciphertext, len);
	int finalBlockBytes{ 0 };
	EVP_DecryptFinal_ex(cipher.getCtx(), plaintext + bytesDecrypted, &finalBlockBytes);
	return StringRef(plaintext, bytesDecrypted + finalBlockBytes);
}

StringRef DecryptionStreamCipher::finish(Arena& arena) {
	auto plaintext = new (arena) unsigned char[AES_BLOCK_SIZE];