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simple_mte_core_console

using System;

namespace MTE {
  class demoCsMin {
    static int Main() {
      // Status.
      MteStatus status;

      // Input.
      string input = "hello";

      // Personalization string.
      string personal = "demo";

      // Initialize MTE license. If a license code is not required (e.g., trial
      // mode), this can be skipped. This demo attempts to load the license
      // info from the environment if required.
      MteBase baseObj = new MteBase();
      if (!baseObj.InitLicense("YOUR_COMPANY", "YOUR_LICENSE")) {
        string company = Environment.GetEnvironmentVariable("MTE_COMPANY");
        string license = Environment.GetEnvironmentVariable("MTE_LICENSE");
        if (company == null || license == null ||
            !baseObj.InitLicense(company, license)) {
          status = MteStatus.mte_status_license_error;
          Console.Error.WriteLine("License init error ({0}): {1}",
                                  baseObj.GetStatusName(status),
                                  baseObj.GetStatusDescription(status));
          return (int)status;
        }
      }

      // Output original data.
      Console.WriteLine("Original data: {0}", input);

      // Create the Encoder and Decoder.
      MteEnc encoder = new MteEnc();
      MteDec decoder = new MteDec();

      // Create all-zero entropy for this demo. The nonce will also be set to 0.
      // This should never be done in real applications.
      int entropyBytes = encoder.GetDrbgsEntropyMinBytes(encoder.GetDrbg());
      byte[] entropy = new byte[entropyBytes];

      // Instantiate the Encoder.
      encoder.SetEntropy(entropy);
      encoder.SetNonce(0);
      status = encoder.Instantiate(personal);
      if (status != MteStatus.mte_status_success) {
        Console.Error.WriteLine("Encoder instantiate error ({0}): {1}",
                                encoder.GetStatusName(status),
                                encoder.GetStatusDescription(status));
        return (int)status;
      }

      // Encode the input.
      string encoded = encoder.EncodeB64(input, out status);
      if (status != MteStatus.mte_status_success) {
        Console.Error.WriteLine("Encode error ({0}): {1}",
                                encoder.GetStatusName(status),
                                encoder.GetStatusDescription(status));
        return (int)status;
      }

      // Display the message.
      Console.WriteLine("Base64 message: {0}", encoded);

      // Instantiate the Decoder.
      decoder.SetEntropy(entropy);
      decoder.SetNonce(0);
      status = decoder.Instantiate(personal);
      if (status != MteStatus.mte_status_success) {
        Console.Error.WriteLine("Decoder instantiate error ({0}): {1}",
                                decoder.GetStatusName(status),
                                decoder.GetStatusDescription(status));
        return (int)status;
      }

      // Decode the message.
      string decoded = decoder.DecodeStrB64(encoded, out status);
      if (decoder.StatusIsError(status)) {
        Console.Error.WriteLine("Decode error ({0}): {1}",
                                decoder.GetStatusName(status),
                                decoder.GetStatusDescription(status));
        return (int)status;
      } else if (status != MteStatus.mte_status_success) {
        Console.Error.WriteLine("Decode warning ({0}): {1}",
                                decoder.GetStatusName(status),
                                decoder.GetStatusDescription(status));
      }

      // Output the decoded data.
      Console.WriteLine("Decoded data: {0}", decoded);

      // Compare the decoded data against the original data.
      if (decoded == input) {
        Console.WriteLine("The original data and decoded data match.");
      } else {
        Console.WriteLine("The original data and decoded data DO NOT match.");
        return -1;
      }

      // Success.
      return 0;
    }
  }
}