/**
* 私钥解密,需注意的是这里的PEM 私钥文件是PKCS1格式，而Java中的是PKCS8格式
*/
public static string DecryptWithPrivate(string base64Input, string privateKey)
{
string priXml = RsaKeyConvert.PrivateKeyPkcs1ToXml(privateKey);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromXmlString(priXml);
cipherbytes = rsa.Decrypt(Convert.FromBase64String(base64Input), false);
return(Encoding.UTF8.GetString(cipherbytes));
}
/// <summary>
/// 用私钥给数据进行RSA加密
/// </summary>
/// <param name="xmlPrivateKey"> 私钥(XML格式字符串)</param>
/// <param name="strEncryptString"> 要加密的数据 </param>
/// <returns> 加密后的数据 </returns>
public static string EncryptWithPrivate(string strEncryptString, string privateKey)
{
string priXml = RsaKeyConvert.PrivateKeyPkcs1ToXml(privateKey);
//加载私钥
RSACryptoServiceProvider privateRsa = new RSACryptoServiceProvider();
privateRsa.FromXmlString(priXml);
//转换密钥
AsymmetricCipherKeyPair keyPair = DotNetUtilities.GetKeyPair(privateRsa);
IBufferedCipher c = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding"); //使用RSA/ECB/PKCS1Padding格式
//第一个参数为true表示加密，为false表示解密；第二个参数表示密钥
c.Init(true, keyPair.Private);
byte[] DataToEncrypt = Encoding.UTF8.GetBytes(strEncryptString);
byte[] outBytes = c.DoFinal(DataToEncrypt);//加密
string strBase64 = Convert.ToBase64String(outBytes);
return(strBase64);
}
