HMAC SHA-1 to Match RFC 2022 Test Vectors

Demonstrates using Chilkat in C# to computer HMAC SHA-1 message authentication codes to match the test vectors given by RFC 2202.

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Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

//  Any string argument automatically begins the 30-day trial.
bool success;
success = crypt.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show("Crypt component unlock failed");
    return;
}

//  The output will be Hex, so set the EncodingMode:
crypt.EncodingMode = "hex";

//  Set the hash algorithm:
//  Choices are: md5, sha-1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm = "sha-1";

string mac;

//  Set the HMAC key:
crypt.SetHmacKeyEncoded("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b","hex");
mac = crypt.HmacStringENC("Hi There");
textBox1.Text += mac + "\r\n";
textBox1.Refresh();

crypt.SetHmacKeyEncoded("Jefe","us-ascii");
mac = crypt.HmacStringENC("what do ya want for nothing?");
textBox1.Text += mac + "\r\n";
textBox1.Refresh();