MD5 Hash a String

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C# example to Digest-MD5 hash an XML document.

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;
}

string xmlDoc;
xmlDoc = "<test><a>123</a><b>456</b><c>789</c></test>";

//  This example was created in response to a request to
//  do this:
//  XML-->byte[]-->MD5(byte[])-->Base64(string)

//  The output will be Base64, so set the EncodingMode:
crypt.EncodingMode = "base64";

//  It is desired to hash bytes.  Depending on the programming
//  language, strings may be Unicode (2 bytes/char).  We don't
//  want to hash Unicode.  By setting the Charset property,
//  we're telling the encryption component to first convert
//  a string to the multibyte charset indicated.
crypt.Charset = "windows-1252";

//  Set the hash algorithm:
//  Choices are: md5, sha1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm = "md5";

string hashStr;
//  Hash the string:
//  Internally, this converts the string to bytes, hashes the bytes,
//  and converts the hash bytes to a Base64 encoded string:

//  Note: Any method in Chilkat Crypt that ends with "ENC" returns the
//  output bytes (i.e. hashed or encrypted) as an encoded string
//  according to the EncodingMode property, which can be "base64",
//  "hex", "url", "quoted-printable", or "html" (for HTML entities).
hashStr = crypt.HashStringENC(xmlDoc);

textBox1.Text += hashStr + "\r\n";
textBox1.Refresh();