IPWorks Encrypt 2020 Python Edition

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compute_mac Method

Computes the MAC.

Syntax

def compute_mac() -> None: ...

Remarks

on_compute_mac computes the MAC (Message Authentication Code) from the input data.

Before calling this method set key to a 256 bit (32 byte) key. If encode_mac is set to True (default) the output data will be hex encoded.

Input Notes

The class will determine the source of the input based on which properties are set.

The order in which the input properties are checked are as follows:

When a valid source is found the search stops.

After calling this method mac_value will be populated with the computed 128 bit (16 byte) value.

ComputeMAC Example


Poly1305 poly1305 = new Poly1305();
poly1305.KeyB = new byte[] { 0x1c, 0x92, 0x40, 0xa5, 0xeb, 0x55, 0xd3, 0x8a, 0xf3, 0x33, 0x88, 0x86, 0x04, 0xf6, 0xb5, 0xf0, 0x47, 0x39, 0x17, 0xc1, 0x40, 0x2b, 0x80, 0x09, 0x9d, 0xca, 0x5c, 0xbc, 0x20, 0x70, 0x75, 0xc0 };
poly1305.InputMessage = "Hello Polly";
poly1305.EncodeMAC = true; //hex output
poly1305.ComputeMAC();

//This outputs "113019A3ACF5ED2FBB7A45AC1FD67DA1"
Console.WriteLine(poly1305.MACValue);

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IPWorks Encrypt 2020 Python Edition - Version 20.0 [Build 8155]