getSHA1

private System.Byte[] getSHA1(Str _input)
{
    System.Security.Cryptography.SHA1Managed sha1Managed;
    System.Text.Encoding encoding;
    System.Byte[] bytes;
    str errorMessage;

    try
    {
        sha1Managed = new System.Security.Cryptography.SHA1Managed();

        encoding = System.Text.Encoding::get_Default();

        bytes = sha1Managed.ComputeHash(encoding.GetBytes(_input));
    }
    catch
    {
        errorMessage = AifUtil::getClrErrorMessage();

        if(errorMessage)
        {
            throw error (errorMessage);
        }
    }

    return bytes;
}