/// <summary>
/// Decrypts array of bytes (if public key is used for encryption than private key needs to be used for decryption and vice versa)
/// </summary>
/// <param name="data">Data to decrypt</param>
/// <param name="key">Key to use for decryption</param>
/// <returns>Decrypted data</returns>
public static byte[] Decrypt(byte[] data, RsaPrivateKey key)
{
using (var rsa = RSA.Create())
{
var parms = key.GetParameters();
rsa.KeySize = parms.Modulus.Length * 8;
rsa.ImportParameters(parms);
return(rsa.Decrypt(data, RSAEncryptionPadding.OaepSHA1));
}
}
/// <summary>
/// Decrypts string (if public key is used for encryption than private key needs to be used for decryption and vice versa)
/// </summary>
/// <param name="data">Data to decrypt</param>
/// <param name="key">Key to use for decryption</param>
/// <returns>Decrypted data</returns>
public static string Decrypt(string data, RsaPrivateKey key)
{
byte[] bytes = Convert.FromBase64String(data.UglifyBase64());
byte[] decrypted = Decrypt(bytes, key);
return(Encoding.UTF8.GetString(decrypted));
}
/// <summary>
/// Constructor, accepts RSAParameters
/// </summary>
/// <param name="rsaParams">RSA parameters</param>
public RsaKeyPair(RSAParameters rsaParams)
{
PublicKey = new RsaPublicKey(rsaParams);
PrivateKey = new RsaPrivateKey(rsaParams);
}
/// <summary>
/// Constructor accepts private key, only stores public part of the key
/// </summary>
/// <param name="key">Private key</param>
public RsaPublicKey(RsaPrivateKey key) : this(key?.Key)
{
}
/// <summary>
/// Constructor accepts private key
/// </summary>
/// <param name="privateKey">Private key</param>
public RsaKeyPair(RsaPrivateKey privateKey)
{
PrivateKey = privateKey ?? throw new System.ArgumentNullException(nameof(privateKey));
PublicKey = new RsaPublicKey(privateKey);
}