/// <summary>
/// 验签
/// </summary>
/// <param name="content">待验签字符串</param>
/// <param name="signedString">签名</param>
/// <param name="publicKey">公钥</param>
/// <returns>true(通过)，false(不通过)</returns>
public static bool Verify(string content, string signedString, string publicKey)
{
AsymmetricKeyParameter pubKey = RsaKeyHelper.loadPublicKey(publicKey);
ISigner signer = SignerUtilities.GetSigner("SHA256withRSA"); //其他算法 如SHA1withRSA
signer.Init(false, pubKey);
var expectedSig = Convert.FromBase64String(signedString);
var msgBytes = Encoding.UTF8.GetBytes(content);
signer.BlockUpdate(msgBytes, 0, msgBytes.Length);
return(signer.VerifySignature(expectedSig));
}
/// <summary>
/// 签名
/// </summary>
/// <param name="content">待签名字符串</param>
/// <param name="privateKey">私钥</param>
/// <returns>签名后字符串</returns>
public static string Sign(string content, string privateKey)
{
AsymmetricKeyParameter priKey = RsaKeyHelper.loadPrivateKeyPk1(privateKey);
ISigner sig = SignerUtilities.GetSigner("SHA256withRSA"); //其他算法 如SHA1withRSA
sig.Init(true, priKey);
var bytes = Encoding.UTF8.GetBytes(content);
sig.BlockUpdate(bytes, 0, bytes.Length);
byte[] signature = sig.GenerateSignature();
var signedString = Convert.ToBase64String(signature);
return(signedString);
}
/// <summary>
/// 私钥解密
/// </summary>
/// <param name="resData">加密字符串</param>
/// <param name="privateKey">私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>明文</returns>
public static string Decrypt(string resData, string privateKey)
{
try
{
AsymmetricKeyParameter priKey = RsaKeyHelper.loadPrivateKeyPk1(privateKey);
IBufferedCipher cipher = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding");
cipher.Init(false, priKey);//false表示解密
var encryptData = Convert.FromBase64String(resData);
var decryptData = cipher.DoFinal(encryptData);
return(Encoding.UTF8.GetString(decryptData));
}
catch (Exception) {
throw new Exception("解密失败");
}
}
/// <summary>
/// 公钥加密
/// </summary>
/// <param name="resData">需要加密的字符串</param>
/// <param name="publicKey">公钥</param>
/// <returns>明文</returns>
public static string Encrypt(string resData, string publicKey)
{
try
{
AsymmetricKeyParameter pubKey = RsaKeyHelper.loadPublicKey(publicKey);
IBufferedCipher cipher = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding");
cipher.Init(true, pubKey);//true表示加密
var data = Encoding.UTF8.GetBytes(resData.Trim());
byte[] encryptData = cipher.DoFinal(data);
return(Convert.ToBase64String(encryptData));
}
catch (Exception)
{
throw new Exception("加密失败");
}
}