/// <summary>
/// RSA私玥解密
/// </summary>
/// <param name="privateKey"></param>
/// <param name="cipherText"></param>
/// <returns></returns>
public static string RsaDecrypt(string privateKey, string cipherText)
{
byte[] dataBytes = Convert.FromBase64String(cipherText); //对加密方法返回的byte[]，用Convert.ToBase64String，普通的文字并不是 base 64 编码的，不能使用 FromBase64String 转换成 byte[]
using (RSA privateKeyRsaProvider = RsaProvider.CreateRsaProviderFromPrivateKey(privateKey))
{
return(Encoding.UTF8.GetString(privateKeyRsaProvider.Decrypt(dataBytes, RSAEncryptionPadding.Pkcs1)));
}
}
/// <summary>
/// 使用私钥签名
/// </summary>
/// <param name="data">原始数据</param>
/// <returns></returns>
public static string RsaSign(string privateKey, string data)
{
byte[] dataBytes = Encoding.UTF8.GetBytes(data);
using (RSA privateKeyRsaProvider = RsaProvider.CreateRsaProviderFromPrivateKey(privateKey))
{
var signatureBytes = privateKeyRsaProvider.SignData(dataBytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
return(Convert.ToBase64String(signatureBytes));
}
}