/// <summary>
/// Decrypt a piece of text based on a given certificate
/// </summary>
/// <param name="stringToDecrypt">Text to decrypt</param>
/// <param name="thumbPrint">Thumbprint of the certificate to use</param>
/// <returns>Decrypted text</returns>
public static string Decrypt(string stringToDecrypt, string thumbPrint)
{
string decryptedString = string.Empty;
X509Certificate2 certificate = X509CertificateUtility.LoadCertificate(StoreName.My, StoreLocation.LocalMachine, thumbPrint);
if (certificate == null)
{
return(string.Empty);
}
byte[] encrypted;
byte[] decrypted;
encrypted = Convert.FromBase64String(stringToDecrypt);
try
{
decrypted = X509CertificateUtility.Decrypt(encrypted, true, certificate);
}
catch (Exception)
{
return(string.Empty);
}
decryptedString = Encoding.UTF8.GetString(decrypted);
return(decryptedString);
}
//static byte[] aditionalEntropy = { 1, 7, 0, 5, 15 };
/// <summary>
/// Encrypt a piece of text based on a given certificate
/// </summary>
/// <param name="stringToEncrypt">Text to encrypt</param>
/// <param name="thumbPrint">Thumbprint of the certificate to use</param>
/// <returns>Encrypted text</returns>
public static string Encrypt(string stringToEncrypt, string thumbPrint)
{
string encryptedString = string.Empty;
X509Certificate2 certificate = X509CertificateUtility.LoadCertificate(StoreName.My, StoreLocation.LocalMachine, thumbPrint);
if (certificate == null)
{
return(string.Empty);
}
byte[] encoded = Encoding.UTF8.GetBytes(stringToEncrypt);
byte[] encrypted;
try
{
encrypted = X509CertificateUtility.Encrypt(encoded, true, certificate);
}
catch (Exception)
{
return(string.Empty);
}
encryptedString = Convert.ToBase64String(encrypted);
return(encryptedString);
}