/// <summary>
/// Export RSA private key
/// </summary>
/// <param name="rsa"></param>
/// <param name="type"></param>
/// <param name="privateKey"></param>
/// <param name="isPem">Only valid if the private key type is PKCS#1 and PKCS#8.</param>
/// <returns></returns>
public static void ImportPrivateKey(this RSA rsa, RSAKeyType type, string privateKey, bool isPem = false)
{
if (isPem)
{
privateKey = PemFormatUtil.RemoveFormat(privateKey);
}
switch (type)
{
case RSAKeyType.Pkcs1:
rsa.ImportRSAPrivateKey(Convert.FromBase64String(privateKey), out _);
break;
case RSAKeyType.Pkcs8:
rsa.ImportPkcs8PrivateKey(Convert.FromBase64String(privateKey), out _);
break;
case RSAKeyType.Xml:
rsa.ImportXmlPrivateKey(privateKey);
break;
default:
throw new ArgumentOutOfRangeException(nameof(type), type, null);
}
}
/// <summary>
/// Export RSA private key
/// </summary>
/// <param name="rsa"></param>
/// <param name="type"></param>
/// <param name="usePemFormat">Only valid if the private key type is PKCS#1 and PKCS#8.</param>
/// <returns></returns>
public static string ExportPrivateKey(this RSA rsa, RSAKeyType type, bool usePemFormat = false)
{
var key = string.Empty;
switch (type)
{
case RSAKeyType.Pkcs1:
key = Convert.ToBase64String(rsa.ExportRSAPrivateKey());
break;
case RSAKeyType.Pkcs8:
key = Convert.ToBase64String(rsa.ExportPkcs8PrivateKey());
break;
case RSAKeyType.Xml:
key = rsa.ExportXmlPrivateKey();
break;
}
if (usePemFormat && type != RSAKeyType.Xml)
{
key = PemFormatUtil.GetPrivateKeyFormat(type, key);
}
return(key);
}
public static byte[] ExportPkcs8PublicKey(this RSA rsa)
{
var pub = rsa.ExportParameters(false);
RsaKeyParameters rsaKeyParameters = new RsaKeyParameters(false, new BigInteger(1, pub.Modulus), new BigInteger(1, pub.Exponent));
StringWriter sw = new StringWriter();
PemWriter pWrt = new PemWriter(sw);
pWrt.WriteObject(rsaKeyParameters);
pWrt.Writer.Close();
return(Convert.FromBase64String(PemFormatUtil.RemoveFormat(sw.ToString())));
}
/// <summary>
/// Export RSA public key
/// </summary>
/// <param name="rsa"></param>
/// <param name="type"></param>
/// <param name="usePemFormat">Only valid if the public key type is PKCS#1 and PKCS#8.</param>
/// <returns></returns>
public static string ExportPublicKey(this RSA rsa, RSAKeyType type, bool usePemFormat = false)
{
var key = type switch
{
RSAKeyType.Pkcs1 => Convert.ToBase64String(rsa.ExportRSAPublicKey()),
RSAKeyType.Pkcs8 => Convert.ToBase64String(rsa.ExportPkcs8PublicKey()),
RSAKeyType.Xml => rsa.ExportXmlPublicKey(),
_ => string.Empty
};
if (usePemFormat && type != RSAKeyType.Xml)
{
key = PemFormatUtil.GetPublicKeyFormat(type, key);
}
return(key);
}
/// <summary>
/// Export RSA public key
/// </summary>
/// <param name="rsa"></param>
/// <param name="type"></param>
/// <param name="publicKey"></param>
/// <param name="isPem">Only valid if the private key type is PKCS#1 and PKCS#8.</param>
/// <returns></returns>
public static void ImportPublicKey(this RSA rsa, RSAKeyType type, string publicKey, bool isPem = false)
{
if (isPem)
{
publicKey = PemFormatUtil.RemoveFormat(publicKey);
}
switch (type)
{
case RSAKeyType.Pkcs1:
case RSAKeyType.Pkcs8:
rsa.ImportRSAPublicKey(Convert.FromBase64String(publicKey), out _);
break;
case RSAKeyType.Xml:
rsa.ImportXmlPublicKey(publicKey);
break;
}
}