C#加密知識整合 (AES,MD5,RSA,SHA256)
更新時(shí)間：2022年01月14日 16:00:38 作者：高1234
這篇文章主要介紹了c#對于加密的一點(diǎn)整合 (AES,MD5,RSA,SHA256),本文給大家介紹的非常詳細(xì)，對大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下
aes 對稱加密密鑰必須是32字節(jié)
using System;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
public class AES
{
/// <summary>
/// 獲取密鑰 必須是32字節(jié)
/// </summary>
private static string Key
{
get { return @"abcdefghijklmnopqrstuvwxyz123456"; }
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="plainStr">明文字符串</param>
/// <returns>密文</returns>
public static string AESEncrypt(string encryptStr)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(encryptStr);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
public static string AESDEncrypt(string encryptStr)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key);
byte[] toEncryptArray = Convert.FromBase64String(encryptStr);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return UTF8Encoding.UTF8.GetString(resultArray);
}
}
}調(diào)用方式：
/// aes 對稱加密解密
string s = AES.AESEncrypt("202201131552測試數(shù)據(jù)");
Console.WriteLine(s);
Console.WriteLine(AES.AESDEncrypt(s));
Console.WriteLine("------------------------------------------------------");MD5 不可逆加密
using System;
using System.Security.Cryptography;
namespace ConsoleApp1
{
public class MD5Helper
{
public static string md5(string str)
{
try
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] bytValue, bytHash;
bytValue = System.Text.Encoding.UTF8.GetBytes(str);
bytHash = md5.ComputeHash(bytValue);
md5.Clear();
string sTemp = "";
for (int i = 0; i < bytHash.Length; i++)
{
sTemp += bytHash[i].ToString("X").PadLeft(2, '0');
}
str = sTemp.ToLower();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
return str;
}
}
}調(diào)用方式：
/// MD5 不可逆加密
var MD5 = MD5Helper.md5("123456");
Console.WriteLine("------------------------------------------------------");SHA 256 不可逆加密
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
public class SHA256Helper
{
/// <summary>
/// SHA256加密
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static string SHA256EncryptString(string data)
{
byte[] bytes = Encoding.UTF8.GetBytes(data);
byte[] hash = SHA256Managed.Create().ComputeHash(bytes);
StringBuilder builder = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
builder.Append(hash[i].ToString("x2"));
}
return builder.ToString();
}
}
}調(diào)用方式：
///SHA 256 不可逆加密
var sha256 = SHA256Helper.SHA256EncryptString("1111");
Console.WriteLine("------------------------------------------------------");RSA 非對稱加密解密
百度rsa密鑰在線生成 http://web.chacuo.net/netrsakeypair/ 填入公私鑰到變量publickey, privatekey
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
public class RSAPkcs8Helper
{
/// <summary>
/// 簽名
/// </summary>
/// <param name="content">待簽名字符串</param>
/// <param name="privateKey">私鑰</param>
/// <param name="input_charset">編碼格式</param>
/// <returns>簽名后字符串</returns>
public static string sign(string content, string privateKey, string input_charset)
{
byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey); //MD5 sh = new MD5CryptoServiceProvider();//這里也可以使用MD5加密方式
SHA1 sh = new SHA1CryptoServiceProvider();
byte[] signData = rsa.SignData(Data, sh);
return Convert.ToBase64String(signData);
}
/// <summary>
/// 驗(yàn)簽
/// </summary>
/// <param name="content">待驗(yàn)簽字符串</param>
/// <param name="signedString">簽名</param>
/// <param name="publicKey">公鑰</param>
/// <param name="input_charset">編碼格式</param>
/// <returns>true(通過)，false(不通過)</returns>
public static bool verify(string content, string signedString, string publicKey, string input_charset)
{
bool result = false;
byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
byte[] data = Convert.FromBase64String(signedString);
RSAParameters paraPub = ConvertFromPublicKey(publicKey);
RSACryptoServiceProvider rsaPub = new RSACryptoServiceProvider();
rsaPub.ImportParameters(paraPub); //MD5 sh = new MD5CryptoServiceProvider();//這里可以使用MD5加密方式
SHA1 sh = new SHA1CryptoServiceProvider();
result = rsaPub.VerifyData(Data, sh, data);
return result;
}
/// <summary>
/// 加密
/// </summary>
/// <param name="resData">需要加密的字符串</param>
/// <param name="publicKey">公鑰</param>
/// <param name="input_charset">編碼格式</param>
/// <returns>明文</returns>
public static string encryptData(string resData, string publicKey, string input_charset)
{
byte[] DataToEncrypt = Encoding.GetEncoding(input_charset).GetBytes(resData);
string result = encrypt(DataToEncrypt, publicKey, input_charset);
return result;
}
/// <summary>
/// 解密
/// </summary>
/// <param name="resData">加密字符串</param>
/// <param name="privateKey">私鑰</param>
/// <param name="input_charset">編碼格式</param>
/// <returns>明文</returns>
public static string decryptData(string resData, string privateKey, string input_charset)
{
byte[] DataToDecrypt = Convert.FromBase64String(resData);
string result = "";
for (int j = 0; j < DataToDecrypt.Length / 128; j++)
{
byte[] buf = new byte[128];
for (int i = 0; i < 128; i++)
{
buf[i] = DataToDecrypt[i + 128 * j];
}
result += decrypt(buf, privateKey, input_charset);
}
return result;
}
#region 內(nèi)部方法
private static string encrypt(byte[] data, string publicKey, string input_charset)
{
RSACryptoServiceProvider rsa = DecodePemPublicKey(publicKey); //MD5 sh = new MD5CryptoServiceProvider();//這里也可以使用MD5加密方式
SHA1 sh = new SHA1CryptoServiceProvider();
byte[] result = rsa.Encrypt(data, false);
return Convert.ToBase64String(result);
}
private static string decrypt(byte[] data, string privateKey, string input_charset)
{
string result = "";
RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey); //MD5 sh = new MD5CryptoServiceProvider();//這里也可以替換使用MD5方式
SHA1 sh = new SHA1CryptoServiceProvider();
byte[] source = rsa.Decrypt(data, false);
char[] asciiChars = new char[Encoding.GetEncoding(input_charset).GetCharCount(source, 0, source.Length)];
Encoding.GetEncoding(input_charset).GetChars(source, 0, source.Length, asciiChars, 0);
result = new string(asciiChars);
//result = ASCIIEncoding.ASCII.GetString(source);
return result;
}
private static RSACryptoServiceProvider DecodePemPublicKey(String pemstr)
{
byte[] pkcs8publickkey;
pkcs8publickkey = Convert.FromBase64String(pemstr);
if (pkcs8publickkey != null)
{
RSACryptoServiceProvider rsa = DecodeRSAPublicKey(pkcs8publickkey);
return rsa;
}
else
return null;
}
private static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr)
{
byte[] pkcs8privatekey;
pkcs8privatekey = Convert.FromBase64String(pemstr);
if (pkcs8privatekey != null)
{
RSACryptoServiceProvider rsa = DecodePrivateKeyInfo(pkcs8privatekey);
return rsa;
}
else
return null;
}
private static RSACryptoServiceProvider DecodePrivateKeyInfo(byte[] pkcs8)
{
byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] seq = new byte[15];
MemoryStream mem = new MemoryStream(pkcs8);
int lenstream = (int)mem.Length;
BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 0;
try
{
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;
bt = binr.ReadByte();
if (bt != 0x02)
return null;
twobytes = binr.ReadUInt16();
if (twobytes != 0x0001)
return null;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct
return null;
bt = binr.ReadByte();
if (bt != 0x04) //expect an Octet string
return null;
bt = binr.ReadByte(); //read next byte, or next 2 bytes is 0x81 or 0x82; otherwise bt is the byte count
if (bt == 0x81)
binr.ReadByte();
else
if (bt == 0x82)
binr.ReadUInt16();
//------ at this stage, the remaining sequence should be the RSA private key
byte[] rsaprivkey = binr.ReadBytes((int)(lenstream - mem.Position));
RSACryptoServiceProvider rsacsp = DecodeRSAPrivateKey(rsaprivkey);
return rsacsp;
}
catch (Exception)
{
return null;
}
finally { binr.Close(); }
}
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;
}
private static RSACryptoServiceProvider DecodeRSAPublicKey(byte[] publickey)
{
// 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];
// --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
MemoryStream mem = new MemoryStream(publickey);
BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 0;
try
{
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);
byte firstbyte = binr.ReadByte();
binr.BaseStream.Seek(-1, SeekOrigin.Current);
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 -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAKeyInfo = new RSAParameters();
RSAKeyInfo.Modulus = modulus;
RSAKeyInfo.Exponent = exponent;
RSA.ImportParameters(RSAKeyInfo);
return RSA;
}
catch (Exception)
{
return null;
}
finally { binr.Close(); }
}
private static RSACryptoServiceProvider DecodeRSAPrivateKey(byte[] privkey)
{
byte[] MODULUS, E, D, P, Q, DP, DQ, IQ;
// --------- Set up stream to decode the asn.1 encoded RSA private key ------
MemoryStream mem = new MemoryStream(privkey);
BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 0;
int elems = 0;
try
{
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();
if (twobytes != 0x0102) //version number
return null;
bt = binr.ReadByte();
if (bt != 0x00)
return null;
//------ all private key components are Integer sequences ----
elems = GetIntegerSize(binr);
MODULUS = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
E = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
D = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
P = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
Q = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
DP = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
DQ = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
IQ = binr.ReadBytes(elems);
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAparams = new RSAParameters();
RSAparams.Modulus = MODULUS;
RSAparams.Exponent = E;
RSAparams.D = D;
RSAparams.P = P;
RSAparams.Q = Q;
RSAparams.DP = DP;
RSAparams.DQ = DQ;
RSAparams.InverseQ = IQ;
RSA.ImportParameters(RSAparams);
return RSA;
}
catch (Exception)
{
return null;
}
finally { binr.Close(); }
}
private static int GetIntegerSize(BinaryReader binr)
{
byte bt = 0;
byte lowbyte = 0x00;
byte highbyte = 0x00;
int count = 0;
bt = binr.ReadByte();
if (bt != 0x02) //expect integer
return 0;
bt = binr.ReadByte();
if (bt == 0x81)
count = binr.ReadByte(); // data size in next byte
else
if (bt == 0x82)
{
highbyte = binr.ReadByte(); // data size in next 2 bytes
lowbyte = binr.ReadByte();
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
count = BitConverter.ToInt32(modint, 0);
}
else
{
count = bt; // we already have the data size
}
while (binr.ReadByte() == 0x00)
{ //remove high order zeros in data
count -= 1;
}
binr.BaseStream.Seek(-1, SeekOrigin.Current); //last ReadByte wasn't a removed zero, so back up a byte
return count;
}
#endregion
#region 解析.net 生成的Pem
private static RSAParameters ConvertFromPublicKey(string pemFileConent)
{
byte[] keyData = Convert.FromBase64String(pemFileConent);
if (keyData.Length < 162)
{
throw new ArgumentException("pem file content is incorrect.");
}
byte[] pemModulus = new byte[128];
byte[] pemPublicExponent = new byte[3];
Array.Copy(keyData, 29, pemModulus, 0, 128);
Array.Copy(keyData, 159, pemPublicExponent, 0, 3);
RSAParameters para = new RSAParameters();
para.Modulus = pemModulus;
para.Exponent = pemPublicExponent;
return para;
}
private static RSAParameters ConvertFromPrivateKey(string pemFileConent)
{
byte[] keyData = Convert.FromBase64String(pemFileConent);
if (keyData.Length < 609)
{
throw new ArgumentException("pem file content is incorrect.");
}
int index = 11;
byte[] pemModulus = new byte[128];
Array.Copy(keyData, index, pemModulus, 0, 128);
index += 128;
index += 2;//141
byte[] pemPublicExponent = new byte[3];
Array.Copy(keyData, index, pemPublicExponent, 0, 3);
index += 3;
index += 4;//148
byte[] pemPrivateExponent = new byte[128];
Array.Copy(keyData, index, pemPrivateExponent, 0, 128);
index += 128;
index += ((int)keyData[index + 1] == 64 ? 2 : 3);//279
byte[] pemPrime1 = new byte[64];
Array.Copy(keyData, index, pemPrime1, 0, 64);
index += 64;
index += ((int)keyData[index + 1] == 64 ? 2 : 3);//346
byte[] pemPrime2 = new byte[64];
Array.Copy(keyData, index, pemPrime2, 0, 64);
index += 64;
index += ((int)keyData[index + 1] == 64 ? 2 : 3);//412/413
byte[] pemExponent1 = new byte[64];
Array.Copy(keyData, index, pemExponent1, 0, 64);
index += 64;
index += ((int)keyData[index + 1] == 64 ? 2 : 3);//479/480
byte[] pemExponent2 = new byte[64];
Array.Copy(keyData, index, pemExponent2, 0, 64);
index += 64;
index += ((int)keyData[index + 1] == 64 ? 2 : 3);//545/546
byte[] pemCoefficient = new byte[64];
Array.Copy(keyData, index, pemCoefficient, 0, 64);
RSAParameters para = new RSAParameters();
para.Modulus = pemModulus;
para.Exponent = pemPublicExponent;
para.D = pemPrivateExponent;
para.P = pemPrime1;
para.Q = pemPrime2;
para.DP = pemExponent1;
para.DQ = pemExponent2;
para.InverseQ = pemCoefficient;
return para;
}
#endregion
}
}調(diào)用方式：
string publickey = "";
string privatekey = "";
publickey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDDLA7Of0H4g+WaAToFCdmLDP4DbCc161JcSr0t+XlMSCEiglFhTOh4+HtCWSpVKhwzTO9ShYwWooTqGpfl1LbLg+RhBXtbMq1M+HaVVkscbbDz3xS6ngUMssktw+Q+9rYtGor+lNGSJHF7HnaTJ6Qyv1oUYiIap4oi1sLPMQDIDwIDAQAB";
privatekey = "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";
//加密字符串
string data = "202201131819gao";
Console.WriteLine("原始：" + data);
//加密
string encrypteddata = RSAPkcs8Helper.encryptData(data, publickey, "UTF-8");
Console.WriteLine("加密：" + encrypteddata);
Console.WriteLine("解密：" + RSAPkcs8Helper.decryptData(encrypteddata, privatekey, "UTF-8"));
Console.WriteLine("------------------------------------------------------");
//解密
string endata = "WI8eYavWOasyYjgWn8r9SXSvW18dmzmlSY4CrWXoTmqHbPCE6iWGYOzes4QOrPDKDPPpHdEpfMYPQZPs2BX84bvpohOejKKQS2TE0hEutk0RMX76ltuFpR51SLqe+TqSEMDbkyoaJRb2OlGA1SqTC+uDpZA1tbofB5v/+5mB5o8=";
string datamw = RSAPkcs8Helper.decryptData(endata, privatekey, "UTF-8");
Console.WriteLine("提前獲知解密：" + datamw);到此這篇關(guān)于c#對于加密的一點(diǎn)整合 (AES,MD5,RSA,SHA256)的文章就介紹到這了,更多相關(guān)c#加密內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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