Thursday, April 8, 2010

Simple cryptography in AX

There are methods in AX which allow to encrypt and decrypt data easily. Those methods are WinAPIServer::cryptProtectData() for encryption and WinAPIServer::cryptUnProtectData() for decryption. As input and output parameters these methods use CryptoBlob extended data type, which is a container. However, this is not an arbitrary container. It should contain only bytes (integers in the range 0-255). There are methods on the Global class which allow to convert from and to CryptoBlob type, for example, Global::binary2cryptoblob() and Global::cryptoblob2binary().

Sample usage:
public static void cryptoTest()
{
    str text = "Here goes some text";
    CryptoBlob encryptedCryptoBlob;
    str decryptedText;
    ;

    encryptedCryptoBlob = WinAPIServer::cryptProtectData(str2cryptoblob(text));
    conview(encryptedCryptoBlob);
    decryptedText = cryptoblob2str(WinAPIServer::cryptUnProtectData(encryptedCryptoBlob));
    info(decryptedText);
}

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