C#与java互通的RSA加密解密

public abstract partial class RSAHelper
{
#region 加密

/// <summary>
/// RSA加密
/// </summary>
/// <param name="publicKeyJava"></param>
/// <param name="data"></param>
/// <returns></returns>
public static string EncryptJava(string publicKeyJava, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromPublicKeyJavaString(publicKeyJava);

//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//HashAlgorithmName hashName = new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm);
//RSAEncryptionPadding padding = RSAEncryptionPadding.OaepSHA512;//RSAEncryptionPadding.CreateOaep(hashName);//.NET 4.6以后特有
//cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), false);

return Convert.ToBase64String(cipherbytes);
}
/// <summary>
/// RSA加密
/// </summary>
/// <param name="publicKeyCSharp"></param>
/// <param name="data"></param>
/// <returns></returns>
public static string EncryptCSharp(string publicKeyCSharp, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromXmlString(publicKeyCSharp);

//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//HashAlgorithmName hashName = new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm);
//RSAEncryptionPadding padding = RSAEncryptionPadding.OaepSHA512;//RSAEncryptionPadding.CreateOaep(hashName);//.NET 4.6以后特有
//cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), false);

return Convert.ToBase64String(cipherbytes);
}

/// <summary>
/// RSA加密PEM秘钥
/// </summary>
/// <param name="publicKeyPEM"></param>
/// <param name="data"></param>
/// <returns></returns>
public static string EncryptPEM(string publicKeyPEM, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.LoadPublicKeyPEM(publicKeyPEM);

//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//HashAlgorithmName hashName = new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm);
//RSAEncryptionPadding padding = RSAEncryptionPadding.OaepSHA512;//RSAEncryptionPadding.CreateOaep(hashName);//.NET 4.6以后特有
//cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), false);

return Convert.ToBase64String(cipherbytes);
}
#endregion

#region 解密

/// <summary>
/// RSA解密
/// </summary>
/// <param name="privateKeyJava"></param>
/// <param name="content"></param>
/// <returns></returns>
public static string DecryptJava(string privateKeyJava, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromPrivateKeyJavaString(privateKeyJava);
//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//RSAEncryptionPadding padding = RSAEncryptionPadding.CreateOaep(new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm));//.NET 4.6以后特有
//cipherbytes = rsa.Decrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Decrypt(Convert.FromBase64String(data), false);

return Encoding.GetEncoding(encoding).GetString(cipherbytes);
}
/// <summary>
/// RSA解密
/// </summary>
/// <param name="privateKeyCSharp"></param>
/// <param name="content"></param>
/// <returns></returns>
public static string DecryptCSharp(string privateKeyCSharp, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.FromXmlString(privateKeyCSharp);
//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//RSAEncryptionPadding padding = RSAEncryptionPadding.CreateOaep(new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm));//.NET 4.6以后特有
//cipherbytes = rsa.Decrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Decrypt(Convert.FromBase64String(data), false);

return Encoding.GetEncoding(encoding).GetString(cipherbytes);
}
/// <summary>
/// RSA解密
/// </summary>
/// <param name="privateKeyPEM"></param>
/// <param name="content"></param>
/// <returns></returns>
public static string DecryptPEM(string privateKeyPEM, string data, string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
byte[] cipherbytes;
rsa.LoadPrivateKeyPEM(privateKeyPEM);
//☆☆☆☆.NET 4.6以后特有☆☆☆☆
//RSAEncryptionPadding padding = RSAEncryptionPadding.CreateOaep(new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm));//.NET 4.6以后特有
//cipherbytes = rsa.Decrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding);
//☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

//☆☆☆☆.NET 4.6以前请用此段代码☆☆☆☆
cipherbytes = rsa.Decrypt(Convert.FromBase64String(data), false);

return Encoding.GetEncoding(encoding).GetString(cipherbytes);
}
#endregion

#region 加签

/// <summary>
/// RSA签名
/// </summary>
/// <param name="privateKeyJava">私钥</param>
/// <param name="data">待签名的内容</param>
/// <returns></returns>
public static string RSASignJava(string data, string privateKeyJava, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromPrivateKeyJavaString(privateKeyJava);//加载私钥
//RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(rsa);
////设置签名的算法为MD5 MD5withRSA 签名
//RSAFormatter.SetHashAlgorithm(hashAlgorithm);

var dataBytes = Encoding.GetEncoding(encoding).GetBytes(data);
var HashbyteSignature = rsa.SignData(dataBytes, hashAlgorithm);
return Convert.ToBase64String(HashbyteSignature);

//byte[] HashbyteSignature = ConvertToRgbHash(data, encoding);

//byte[] dataBytes =Encoding.GetEncoding(encoding).GetBytes(data);
//HashbyteSignature = rsa.SignData(dataBytes, hashAlgorithm);
//return Convert.ToBase64String(HashbyteSignature);
//执行签名
//EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
//return Convert.ToBase64String(RSAFormatter.CreateSignature(HashbyteSignature));
//return result.Replace("=", String.Empty).Replace('+', '-').Replace('/', '_');
}
/// <summary>
/// RSA签名
/// </summary>
/// <param name="privateKeyPEM">私钥</param>
/// <param name="data">待签名的内容</param>
/// <returns></returns>
public static string RSASignPEM(string data, string privateKeyPEM, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.LoadPrivateKeyPEM(privateKeyPEM);//加载私钥
var dataBytes = Encoding.GetEncoding(encoding).GetBytes(data);
var HashbyteSignature = rsa.SignData(dataBytes, hashAlgorithm);
return Convert.ToBase64String(HashbyteSignature);
}
/// <summary>
/// RSA签名CSharp
/// </summary>
/// <param name="privateKeyCSharp">私钥</param>
/// <param name="data">待签名的内容</param>
/// <returns></returns>
public static string RSASignCSharp(string data, string privateKeyCSharp, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(privateKeyCSharp);//加载私钥
var dataBytes = Encoding.GetEncoding(encoding).GetBytes(data);
var HashbyteSignature = rsa.SignData(dataBytes, hashAlgorithm);
return Convert.ToBase64String(HashbyteSignature);
}

#endregion

#region 验签

/// <summary>
/// 验证签名-方法一
/// </summary>
/// <param name="data"></param>
/// <param name="signature"></param>
/// <param name="encoding"></param>
/// <returns></returns>
public static bool VerifyJava(string data, string publicKeyJava, string signature, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//导入公钥，准备验证签名
rsa.FromPublicKeyJavaString(publicKeyJava);
//返回数据验证结果
byte[] Data = Encoding.GetEncoding(encoding).GetBytes(data);
byte[] rgbSignature = Convert.FromBase64String(signature);

return rsa.VerifyData(Data, hashAlgorithm, rgbSignature);

//return SignatureDeformatter(publicKeyJava, data, signature);

//return CheckSign(publicKeyJava, data, signature);

//return rsa.VerifyData(Encoding.GetEncoding(encoding).GetBytes(data), "MD5", Encoding.GetEncoding(encoding).GetBytes(signature));
}
/// <summary>
/// 验证签名PEM
/// </summary>
/// <param name="data"></param>
/// <param name="signature"></param>
/// <param name="encoding"></param>
/// <returns></returns>
public static bool VerifyPEM(string data, string publicKeyPEM, string signature, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//导入公钥，准备验证签名
rsa.LoadPublicKeyPEM(publicKeyPEM);
//返回数据验证结果
byte[] Data = Encoding.GetEncoding(encoding).GetBytes(data);
byte[] rgbSignature = Convert.FromBase64String(signature);

return rsa.VerifyData(Data, hashAlgorithm, rgbSignature);
}

/// <summary>
/// 验证签名CSharp
/// </summary>
/// <param name="data"></param>
/// <param name="signature"></param>
/// <param name="encoding"></param>
/// <returns></returns>
public static bool VerifyCSharp(string data, string publicKeyCSharp, string signature, string hashAlgorithm = "MD5", string encoding = "UTF-8")
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//导入公钥，准备验证签名
rsa.LoadPublicKeyPEM(publicKeyCSharp);
//返回数据验证结果
byte[] Data = Encoding.GetEncoding(encoding).GetBytes(data);
byte[] rgbSignature = Convert.FromBase64String(signature);

return rsa.VerifyData(Data, hashAlgorithm, rgbSignature);
}

#region 签名验证-方法二
/// <summary>
/// 签名验证
/// </summary>
/// <param name="publicKey">公钥</param>
/// <param name="p_strHashbyteDeformatter">待验证的用户名</param>
/// <param name="signature">注册码</param>
/// <returns>签名是否符合</returns>
public static bool SignatureDeformatter(string publicKey, string data, string signature, string hashAlgorithm = "MD5")
{
try
{
byte[] rgbHash = ConvertToRgbHash(data);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//导入公钥，准备验证签名
rsa.FromPublicKeyJavaString(publicKey);

RSAPKCS1SignatureDeformatter deformatter = new RSAPKCS1SignatureDeformatter(rsa);
deformatter.SetHashAlgorithm("MD5");
byte[] rgbSignature = Convert.FromBase64String(signature);
if (deformatter.VerifySignature(rgbHash, rgbSignature))
{
return true;
}
return false;
}
catch
{
return false;
}
}

/// <summary>
/// 签名数据转化为RgbHash
/// </summary>
/// <param name="data"></param>
/// <param name="encoding"></param>
/// <returns></returns>
public static byte[] ConvertToRgbHash(string data, string encoding = "UTF-8")
{
using (MD5 md5 = new MD5CryptoServiceProvider())
{
byte[] bytes_md5_in = Encoding.GetEncoding(encoding).GetBytes(data);
return md5.ComputeHash(bytes_md5_in);
}
}
#endregion

#region 签名验证-方法三
/// <summary>
/// 验证签名
/// </summary>
/// <param name="data">原始数据</param>
/// <param name="sign">签名</param>
/// <returns></returns>
public static bool CheckSign(string publicKey, string data, string sign, string encoding = "UTF-8")
{

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromPublicKeyJavaString(publicKey);
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

byte[] Data = Encoding.GetEncoding(encoding).GetBytes(data);
byte[] rgbSignature = Convert.FromBase64String(sign);
if (rsa.VerifyData(Data, md5, rgbSignature))
{
return true;
}
return false;
}
#endregion
#endregion

}

public partial class RSAHelper
{
#region 私钥加密
/// <summary>
/// 基于BouncyCastle的RSA私钥加密
/// </summary>
/// <param name="privateKeyJava"></param>
/// <param name="data"></param>
/// <returns></returns>
public static string EncryptPrivateKeyJava(string privateKeyJava, string data, string encoding = "UTF-8")
{
RsaKeyParameters privateKeyParam = (RsaKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKeyJava));
byte[] cipherbytes = Encoding.GetEncoding(encoding).GetBytes(data);
RsaEngine rsa = new RsaEngine();
rsa.Init(true, privateKeyParam);//参数true表示加密/false表示解密。
cipherbytes = rsa.ProcessBlock(cipherbytes, 0, cipherbytes.Length);
return Convert.ToBase64String(cipherbytes);
}
#endregion

#region 公钥解密
/// <summary>
/// 基于BouncyCastle的RSA公钥解密
/// </summary>
/// <param name="publicKeyJava"></param>
/// <param name="data"></param>
/// <param name="encoding"></param>
/// <returns></returns>
public static string DecryptPublicKeyJava(string publicKeyJava, string data, string encoding = "UTF-8")
{
RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKeyJava));
byte[] cipherbytes = Convert.FromBase64String(data);
RsaEngine rsa = new RsaEngine();
rsa.Init(false, publicKeyParam);//参数true表示加密/false表示解密。
cipherbytes = rsa.ProcessBlock(cipherbytes, 0, cipherbytes.Length);
return Encoding.GetEncoding(encoding).GetString(cipherbytes);
}
#endregion
#region 加签
/// <summary>
/// 基于BouncyCastle的RSA签名
/// </summary>
/// <param name="data"></param>
/// <param name="privateKeyJava"></param>
/// <param name="hashAlgorithm">JAVA的和.NET的不一样，如：MD5(.NET)等同于MD5withRSA(JAVA)</param>
/// <param name="encoding"></param>
/// <returns></returns>
public static string RSASignJavaBouncyCastle(string data, string privateKeyJava, string hashAlgorithm = "MD5withRSA", string encoding = "UTF-8")
{
RsaKeyParameters privateKeyParam = (RsaKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKeyJava));
ISigner signer = SignerUtilities.GetSigner(hashAlgorithm);
signer.Init(true, privateKeyParam);//参数为true验签，参数为false加签
var dataByte = Encoding.GetEncoding(encoding).GetBytes(data);
signer.BlockUpdate(dataByte, 0, dataByte.Length);
//return Encoding.GetEncoding(encoding).GetString(signer.GenerateSignature()); //签名结果 非Base64String
return Convert.ToBase64String(signer.GenerateSignature());
}
#endregion
#region 验签
/// <summary>
/// 基于BouncyCastle的RSA签名
/// </summary>
/// <param name="data">源数据</param>
/// <param name="publicKeyJava"></param>
/// <param name="signature">base64签名</param>
/// <param name="hashAlgorithm">JAVA的和.NET的不一样，如：MD5(.NET)等同于MD5withRSA(JAVA)</param>
/// <param name="encoding"></param>
/// <returns></returns>
public static bool VerifyJavaBouncyCastle(string data, string publicKeyJava, string signature, string hashAlgorithm = "MD5withRSA", string encoding = "UTF-8")
{
RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKeyJava));
ISigner signer = SignerUtilities.GetSigner(hashAlgorithm);
signer.Init(false, publicKeyParam);
byte[] dataByte = Encoding.GetEncoding(encoding).GetBytes(data);
signer.BlockUpdate(dataByte, 0, dataByte.Length);
//byte[] signatureByte = Encoding.GetEncoding(encoding).GetBytes(signature);// 非Base64String
byte[] signatureByte = Convert.FromBase64String(signature);
return signer.VerifySignature(signatureByte);
}
#endregion

}