C#-RSA加密解密帮助类（非对称加密）
/************************************************************
* Description: RSA 非对称 加密、解密
* Create Time: 2021-05-18
* Author：huioo
* Version: v1.0.1
************************************************************/
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
namespace COMMON.CODES_AND_CIPHERS
{
/// <summary>
/// RSa 加密、解密
/// <para>主要方法如下：</para>
/// <para>01. Encrypt(string text, string public_key) //RSA 加密字符串</para>
/// <para>02. Decrypt(string text, string public_key) //RSA 解密字符串</para>
/// </summary>
public class RSACryption
{
#region 加密字符串
private static bool CompareBytearrays(byte[] a, byte[] b)
{
if (a.Length != b.Length)
return false;
int i = 0;
foreach (byte c in a)
{
if (c != b[i])
return false;
i++;
}
return true;
}
public static RSA CreateRsaProviderFromPublicKey(string publicKeyString)
{
// encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
byte[] seqOid = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] seq = new byte[15];
var x509Key = Convert.FromBase64String(publicKeyString);
// --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
using (MemoryStream mem = new MemoryStream(x509Key))
{
using (BinaryReader binr = new BinaryReader(mem)) //wrap Memory Stream with BinaryReader for easy reading
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, seqOid)) //make sure Sequence for OID is correct
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8203)
binr.ReadInt16(); //advance 2 bytes
else
return null;
bt = binr.ReadByte();
if (bt != 0x00) //expect null byte next
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
twobytes = binr.ReadUInt16();
byte lowbyte = 0x00;
byte highbyte = 0x00;
if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus
else if (twobytes == 0x8202)
{
highbyte = binr.ReadByte(); //advance 2 bytes
lowbyte = binr.ReadByte();
}
else
return null;
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order
int modsize = BitConverter.ToInt32(modint, 0);
int firstbyte = binr.PeekChar();
if (firstbyte == 0x00)
{ //if first byte (highest order) of modulus is zero, don't include it
binr.ReadByte(); //skip this null byte
modsize -= 1; //reduce modulus buffer size by 1
}
byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytes
if (binr.ReadByte() != 0x02) //expect an Integer for the exponent data
return null;
int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values)
byte[] exponent = binr.ReadBytes(expbytes);
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
var rsa = RSA.Create();
RSAParameters rsaKeyInfo = new RSAParameters
{
Modulus = modulus,
Exponent = exponent
};
rsa.ImportParameters(rsaKeyInfo);
return rsa;
}
}
}
/// <summary>
/// RSA 加密字符串
/// </summary>
/// <param name="text">明文</param>
/// <param name="public_key">公钥</param>
/// <returns>密文</returns>
public static byte[] Encrypt(string text, string public_key)
{
RSA _publicKeyRsaProvider = CreateRsaProviderFromPublicKey(public_key);
byte[] bytes = Encoding.UTF8.GetBytes(text);
return _publicKeyRsaProvider.Encrypt(bytes, RSAEncryptionPadding.Pkcs1);
}
/// <summary>
/// RSA 加密字符串
/// </summary>
/// <param name="text">明文</param>
/// <param name="public_key">公钥</param>
/// <param name="padding">填充模式（默认：RSAEncryptionPadding.Pkcs1）</param>
/// <returns>密文</returns>
public static byte[] Encrypt(string text, string public_key, RSAEncryptionPadding padding)
{
RSA _publicKeyRsaProvider = CreateRsaProviderFromPublicKey(public_key);
byte[] bytes = Encoding.UTF8.GetBytes(text);
return _publicKeyRsaProvider.Encrypt(bytes, padding);
}
#endregion
#region 解密字符串
private static int GetIntegerSize(BinaryReader binr)
{
byte bt = 0;
int count = 0;
bt = binr.ReadByte();
if (bt != 0x02)
return 0;
bt = binr.ReadByte();
if (bt == 0x81)
count = binr.ReadByte();
else
if (bt == 0x82)
{
var highbyte = binr.ReadByte();
var lowbyte = binr.ReadByte();
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
count = BitConverter.ToInt32(modint, 0);
}
else
{
count = bt;
}
while (binr.ReadByte() == 0x00)
{
count -= 1;
}
binr.BaseStream.Seek(-1, SeekOrigin.Current);
return count;
}
public static RSA CreateRsaProviderFromPrivateKey(string privateKey)
{
var privateKeyBits = Convert.FromBase64String(privateKey);
var rsa = RSA.Create();
var rsaParameters = new RSAParameters();
using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyBits)))
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130)
binr.ReadByte();
else if (twobytes == 0x8230)
binr.ReadInt16();
else
throw new Exception("Unexpected value read binr.ReadUInt16()");
twobytes = binr.ReadUInt16();
if (twobytes != 0x0102)
throw new Exception("Unexpected version");
bt = binr.ReadByte();
if (bt != 0x00)
throw new Exception("Unexpected value read binr.ReadByte()");
rsaParameters.Modulus = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.Exponent = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.D = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.P = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.Q = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.DP = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.DQ = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.InverseQ = binr.ReadBytes(GetIntegerSize(binr));
}
rsa.ImportParameters(rsaParameters);
return rsa;
}
/// <summary>
/// RSA 解密字符串
/// </summary>
/// <param name="text">明文</param>
/// <param name="private_key">私钥</param>
/// <param name="padding">填充模式（默认：RSAEncryptionPadding.Pkcs1）</param>
/// <returns>密文</returns>
public static byte[] Decrypt(string text, string private_key)
{
RSA _privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(private_key);
byte[] bytes = Encoding.UTF8.GetBytes(text);
return _privateKeyRsaProvider.Decrypt(bytes, RSAEncryptionPadding.Pkcs1);
}
/// <summary>
/// RSA 解密字符串
/// </summary>
/// <param name="text">明文</param>
/// <param name="private_key">私钥</param>
/// <param name="padding">填充模式（默认：RSAEncryptionPadding.Pkcs1）</param>
/// <returns>密文</returns>
public static byte[] Decrypt(string text, string private_key, RSAEncryptionPadding padding)
{
RSA _privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(private_key);
byte[] bytes = Encoding.UTF8.GetBytes(text);
return _privateKeyRsaProvider.Decrypt(bytes, padding);
}
#endregion
}
/// <summary>
/// RSA算法类型
/// </summary>
public enum RSAType
{
/// <summary>
/// SHA1
/// </summary>
RSA = 0,
/// <summary>
/// RSA2 密钥长度至少为2048
/// SHA256
/// </summary>
RSA2
}
/// <summary>
/// https://www.cnblogs.com/stulzq/p/7757915.html
///
/// RSA加解密 使用OpenSSL的公钥加密/私钥解密
/// 作者：李志强
/// 创建时间：2017年10月30日15:50:14
/// QQ:501232752
/// </summary>
public class RSAHelper
{
private readonly RSA _privateKeyRsaProvider;
private readonly RSA _publicKeyRsaProvider;
private readonly HashAlgorithmName _hashAlgorithmName;
private readonly Encoding _encoding;
/// <summary>
/// 实例化RSAHelper
/// </summary>
/// <param name="rsaType">加密算法类型 RSA SHA1;RSA2 SHA256 密钥长度至少为2048</param>
/// <param name="encoding">编码类型</param>
/// <param name="privateKey">私钥</param>
/// <param name="publicKey">公钥</param>
public RSAHelper(RSAType rsaType, Encoding encoding, string privateKey, string publicKey = null)
{
_encoding = encoding;
if (!string.IsNullOrEmpty(privateKey))
{
_privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(privateKey);
}
if (!string.IsNullOrEmpty(publicKey))
{
_publicKeyRsaProvider = CreateRsaProviderFromPublicKey(publicKey);
}
_hashAlgorithmName = rsaType == RSAType.RSA ? HashAlgorithmName.SHA1 : HashAlgorithmName.SHA256;
}
#region 使用私钥签名
/// <summary>
/// 使用私钥签名
/// </summary>
/// <param name="data">原始数据</param>
/// <returns></returns>
public string Sign(string data)
{
byte[] dataBytes = _encoding.GetBytes(data);
var signatureBytes = _privateKeyRsaProvider.SignData(dataBytes, _hashAlgorithmName, RSASignaturePadding.Pkcs1);
return Convert.ToBase64String(signatureBytes);
}
#endregion
#region 使用公钥验证签名
/// <summary>
/// 使用公钥验证签名
/// </summary>
/// <param name="data">原始数据</param>
/// <param name="sign">签名</param>
/// <returns></returns>
public bool Verify(string data, string sign)
{
byte[] dataBytes = _encoding.GetBytes(data);
byte[] signBytes = Convert.FromBase64String(sign);
var verify = _publicKeyRsaProvider.VerifyData(dataBytes, signBytes, _hashAlgorithmName, RSASignaturePadding.Pkcs1);
return verify;
}
#endregion
#region 解密
public string Decrypt(string cipherText)
{
if (_privateKeyRsaProvider == null)
{
throw new Exception("_privateKeyRsaProvider is null");
}
return Encoding.UTF8.GetString(_privateKeyRsaProvider.Decrypt(Convert.FromBase64String(cipherText), RSAEncryptionPadding.Pkcs1));
}
#endregion
#region 加密
public string Encrypt(string text)
{
if (_publicKeyRsaProvider == null)
{
throw new Exception("_publicKeyRsaProvider is null");
}
return Convert.ToBase64String(_publicKeyRsaProvider.Encrypt(Encoding.UTF8.GetBytes(text), RSAEncryptionPadding.Pkcs1));
}
#endregion
#region 使用私钥创建RSA实例
public RSA CreateRsaProviderFromPrivateKey(string privateKey)
{
var privateKeyBits = Convert.FromBase64String(privateKey);
var rsa = RSA.Create();
var rsaParameters = new RSAParameters();
using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyBits)))
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130)
binr.ReadByte();
else if (twobytes == 0x8230)
binr.ReadInt16();
else
throw new Exception("Unexpected value read binr.ReadUInt16()");
twobytes = binr.ReadUInt16();
if (twobytes != 0x0102)
throw new Exception("Unexpected version");
bt = binr.ReadByte();
if (bt != 0x00)
throw new Exception("Unexpected value read binr.ReadByte()");
rsaParameters.Modulus = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.Exponent = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.D = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.P = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.Q = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.DP = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.DQ = binr.ReadBytes(GetIntegerSize(binr));
rsaParameters.InverseQ = binr.ReadBytes(GetIntegerSize(binr));
}
rsa.ImportParameters(rsaParameters);
return rsa;
}
#endregion
#region 使用公钥创建RSA实例
public RSA CreateRsaProviderFromPublicKey(string publicKeyString)
{
// encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
byte[] seqOid = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] seq = new byte[15];
var x509Key = Convert.FromBase64String(publicKeyString);
// --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
using (MemoryStream mem = new MemoryStream(x509Key))
{
using (BinaryReader binr = new BinaryReader(mem)) //wrap Memory Stream with BinaryReader for easy reading
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, seqOid)) //make sure Sequence for OID is correct
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8203)
binr.ReadInt16(); //advance 2 bytes
else
return null;
bt = binr.ReadByte();
if (bt != 0x00) //expect null byte next
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
twobytes = binr.ReadUInt16();
byte lowbyte = 0x00;
byte highbyte = 0x00;
if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus
else if (twobytes == 0x8202)
{
highbyte = binr.ReadByte(); //advance 2 bytes
lowbyte = binr.ReadByte();
}
else
return null;
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order
int modsize = BitConverter.ToInt32(modint, 0);
int firstbyte = binr.PeekChar();
if (firstbyte == 0x00)
{ //if first byte (highest order) of modulus is zero, don't include it
binr.ReadByte(); //skip this null byte
modsize -= 1; //reduce modulus buffer size by 1
}
byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytes
if (binr.ReadByte() != 0x02) //expect an Integer for the exponent data
return null;
int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values)
byte[] exponent = binr.ReadBytes(expbytes);
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
var rsa = RSA.Create();
RSAParameters rsaKeyInfo = new RSAParameters
{
Modulus = modulus,
Exponent = exponent
};
rsa.ImportParameters(rsaKeyInfo);
return rsa;
}
}
}
#endregion
#region 导入密钥算法
private int GetIntegerSize(BinaryReader binr)
{
byte bt = 0;
int count = 0;
bt = binr.ReadByte();
if (bt != 0x02)
return 0;
bt = binr.ReadByte();
if (bt == 0x81)
count = binr.ReadByte();
else
if (bt == 0x82)
{
var highbyte = binr.ReadByte();
var lowbyte = binr.ReadByte();
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
count = BitConverter.ToInt32(modint, 0);
}
else
{
count = bt;
}
while (binr.ReadByte() == 0x00)
{
count -= 1;
}
binr.BaseStream.Seek(-1, SeekOrigin.Current);
return count;
}
private bool CompareBytearrays(byte[] a, byte[] b)
{
if (a.Length != b.Length)
return false;
int i = 0;
foreach (byte c in a)
{
if (c != b[i])
return false;
i++;
}
return true;
}
#endregion
}
/// <summary>
/// https://www.cnblogs.com/CreateMyself/p/9853736.html
/// </summary>
public static class RSAHelper1
{
private const string privateKey = "<RSAKeyValue><Modulus>0wE26IHp4U9OLtPhJ+fT8ej6aWORFP8pd++MjUuhkQQm/zhcImbxQbjxtSAftz+kkDwGDFJpSldQPyigOGcUx7PofTc6VhiFik9E9SsxV9n0iEEtqUndDfmBJfPAWt+4UDMwKakgZqFoapDuwjKlTErFvKCyKCs+qN9OZvZwKWk=</Modulus><Exponent>AQAB</Exponent><P>8Ei6NIsZtgV3DQjuGHfGLS6o1O+IUXxzjqLxdMm77yhEPUxR9YPIxODJ2VVTddXSAHxViJJt30yJ7JhVz6cpQw==</P><Q>4M49NrmalgVQFMsea2RMB1qN8fAPfIw5G9q9hzsLcWSCmkeRRIQlvPYflVEKAYKiDVVzENETbnnduFXWBABx4w==</Q><DP>t+JQbemN0Zi5FQaif6MZzHYKynpNTl75aE0Wj5Pa+RlNr8N6bXNe8Bw/HM2Jw4HQ5oJASvYUk3DVlHS4JuP8VQ==</DP><DQ>lT62iv9brp9mU/epgVh71SH8PJPIZEJfo6tryjyb0zMMNcqvmZI1z6aCv0mm3+vPFBUXqCF1yhFj7n4l8FAvSw==</DQ><InverseQ>flrvgxHvf4l+fdymEVDgKjsfGqshOpppoNgZj9kpeWBto3o8z++Ki6eSLQT3nVnpx2QCZeTWkxTED4nhSLKscw==</InverseQ><D>cQTCg1Eqk7sltmFYxUYgOP/AOPjSufteG9acYwYymPkvZh6rAuY+rSRBmvGE62NUYskzuB/gM6iG2/2HrA5SixfNgCvZ+nsK+kX5pzQRsYdD71ViQW0hOanXwj45I2zHRgBiuTtCUP0fs5pISmQkaeJkDL5pO2l+wvlgl+wunj0=</D></RSAKeyValue>";
private const string publicKey = "<RSAKeyValue><Modulus>0wE26IHp4U9OLtPhJ+fT8ej6aWORFP8pd++MjUuhkQQm/zhcImbxQbjxtSAftz+kkDwGDFJpSldQPyigOGcUx7PofTc6VhiFik9E9SsxV9n0iEEtqUndDfmBJfPAWt+4UDMwKakgZqFoapDuwjKlTErFvKCyKCs+qN9OZvZwKWk=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
public static byte[] Encrypt(byte[] encryptBytes, RSAEncryptionPadding padding)
{
using (var rsa = RSA.Create())
{
FromXmlString(rsa, publicKey);
var maxBlockSize = GetMaxBlockSize(rsa, padding);
if (encryptBytes.Length <= maxBlockSize)
{
var @bytes = rsa.Encrypt(encryptBytes, padding);
return @bytes;
}
using (var memoryStream = new MemoryStream(encryptBytes))
{
using (var readStream = new MemoryStream())
{
byte[] buffer = new byte[maxBlockSize];
int blockSize = memoryStream.Read(buffer, 0, maxBlockSize);
while (blockSize > 0)
{
var blockByte = new byte[blockSize];
Array.Copy(buffer, 0, blockByte, 0, blockSize);
var encrypts = rsa.Encrypt(blockByte, padding);
readStream.Write(encrypts, 0, encrypts.Length);
blockSize = memoryStream.Read(buffer, 0, maxBlockSize);
}
return readStream.ToArray();
}
}
}
}
public static byte[] Decrypt(byte[] decryptBytes, RSAEncryptionPadding padding)
{
using (var rsa = RSA.Create())
{
FromXmlString(rsa, privateKey);
var maxBlockSize = rsa.KeySize / 8;
if (decryptBytes.Length <= maxBlockSize)
{
var @bytes = rsa.Decrypt(decryptBytes, padding);
return @bytes;
}
using (var memoryStream = new MemoryStream(decryptBytes))
{
using (var readStream = new MemoryStream())
{
var buffer = new byte[maxBlockSize];
var blockSize = memoryStream.Read(buffer, 0, maxBlockSize);
while (blockSize > 0)
{
var blockByte = new byte[blockSize];
Array.Copy(buffer, 0, blockByte, 0, blockSize);
var decrypts = rsa.Decrypt(blockByte, padding);
readStream.Write(decrypts, 0, decrypts.Length);
blockSize = memoryStream.Read(buffer, 0, maxBlockSize);
}
return readStream.ToArray();
}
}
}
}
public static void FromXmlString(RSA rsa, string xmlString)
{
RSAParameters parameters = new RSAParameters();
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlString);
if (xmlDoc.DocumentElement.Name.Equals("RSAKeyValue"))
{
foreach (XmlNode node in xmlDoc.DocumentElement.ChildNodes)
{
switch (node.Name)
{
case "Modulus": parameters.Modulus = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "Exponent": parameters.Exponent = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "P": parameters.P = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "Q": parameters.Q = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "DP": parameters.DP = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "DQ": parameters.DQ = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "InverseQ": parameters.InverseQ = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "D": parameters.D = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
}
}
}
else
{
throw new Exception("Invalid XML RSA key.");
}
rsa.ImportParameters(parameters);
}
static int GetMaxBlockSize(RSA rsa, RSAEncryptionPadding padding)
{
var offset = 0;
if (padding.Mode == RSAEncryptionPaddingMode.Pkcs1)
{
offset = 11;
}
else
{
if (padding.Equals(RSAEncryptionPadding.OaepSHA1))
{
offset = 42;
}
if (padding.Equals(RSAEncryptionPadding.OaepSHA256))
{
offset = 66;
}
if (padding.Equals(RSAEncryptionPadding.OaepSHA384))
{
offset = 98;
}
if (padding.Equals(RSAEncryptionPadding.OaepSHA512))
{
offset = 130;
}
}
return rsa.KeySize / 8 - offset;
}
public static void Main(string[] args)
{
var encryptString = "0";
for (int i = 1; i < 2000; i++)
{
encryptString += i;
}
Console.WriteLine(encryptString.Length);
var encryptBytes = Encoding.UTF8.GetBytes(encryptString);
//加密后字节数组
var resultBytes = RSAHelper1.Encrypt(encryptBytes, RSAEncryptionPadding.Pkcs1);
//解密后字节数组
var decryptBytes = RSAHelper1.Decrypt(resultBytes, RSAEncryptionPadding.Pkcs1);
//解密结果
var result = Encoding.UTF8.GetString(decryptBytes);
//比较加密字符串和解密结果是否相等
Console.WriteLine(encryptString == result);
Console.ReadKey();
}
}
}本文来自博客园，作者：꧁执笔小白꧂，转载请注明原文链接：https://www.cnblogs.com/qq2806933146xiaobai/p/16035012.html
【推荐】国内首个AI IDE，深度理解中文开发场景，立即下载体验Trae
【推荐】编程新体验，更懂你的AI，立即体验豆包MarsCode编程助手
【推荐】抖音旗下AI助手豆包，你的智能百科全书，全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell：AI 加持，快人一步
· 全程不用写代码，我用AI程序员写了一个飞机大战
· DeepSeek 开源周回顾「GitHub 热点速览」
· MongoDB 8.0这个新功能碉堡了，比商业数据库还牛
· 记一次.NET内存居高不下排查解决与启示
· 白话解读 Dapr 1.15：你的「微服务管家」又秀新绝活了