/// <summary>
/// Gets a license key from the specified file.
/// </summary>
internal static LicenseKey GetFromText(String keyText)
{
LicenseKey result = null;
if (!String.IsNullOrEmpty(keyText))
{
// Reconstruct the content of the ASN.1 formatted PEM, excluding blank lines and comments
String stringData = String.Join("", keyText.Split('\r', '\n').Where(line => !String.IsNullOrEmpty(line) && !line.Trim().StartsWith("--")));
Byte[] binaryPem = Convert.FromBase64String(stringData);
if (binaryPem.Length != 0)
{
// Extract the header from the PEM content
try
{
Byte[] asnBlock = LicenseKey.GetAsnData(0x30, ref binaryPem);
Byte[] oidBlock = LicenseKey.GetAsnData(0x30, ref asnBlock);
Byte[] oidValue = LicenseKey.GetAsnData(0x06, ref oidBlock);
if (oidValue.SequenceEqual(LicenseKey.RsaObjectIdentifier))
{
// Extract the RSA key from the PEM content
Byte[] rsaBlock = LicenseKey.GetAsnData(0x03, ref asnBlock);
Byte[] rsaValue = LicenseKey.GetAsnData(0x30, ref rsaBlock);
// Construct the RSA parameters
RSAParameters parameters = new RSAParameters();
parameters.Modulus = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.Exponent = LicenseKey.GetAsnData(0x02, ref rsaValue);
if (rsaValue.Length > 0)
{
parameters.D = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.P = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.Q = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.DP = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.DQ = LicenseKey.GetAsnData(0x02, ref rsaValue);
parameters.InverseQ = LicenseKey.GetAsnData(0x02, ref rsaValue);
}
// Create the license key from the RSA
result = new LicenseKey(parameters);
}
}
catch
{
}
}
}
return(result);
}
