密码学应用（DES，AES， MD5， SHA1， RSA， Salt， Pkcs8）
作者：互联网
目录
数据加密标准 - Data Encryption Standard（DES）
高级加密标准 - Advanced Encryption Standard（AES）
消息摘要算法第五版 - Message-Digest Algorithm 5（MD5）
安全哈希算法 - Secure Hash Algorithm（SHA1）
数据加密标准 - Data Encryption Standard（DES）
简介
DES全称为Data Encryption Standard，即数据加密标准，是一种使用密钥加密的块算法，1976年被美国联邦政府的国家标准局确定为联邦资料处理标准（FIPS），随后在国际上广泛流传开来。
核心代码
public class DesCryptoUtil : IDesCryptoUtil
{
/// <summary>
/// The key, length is 8, generated on https://www.random.org/strings/
/// You can also use the GenerateKey method in the DESCryptoServiceProvider to generate the key.
/// </summary>
private static readonly byte[] Key = Encoding.ASCII.GetBytes("0e3Nl9Z9");
/// <summary>
/// The iv, length is 8, generated on https://www.random.org/strings/
/// You can also use the GenerateIV method in the DESCryptoServiceProvider to generate the iv.
/// </summary>
private static readonly byte[] Iv = Encoding.ASCII.GetBytes("62EcX79F");
public byte[] Encrypt(byte[] plainBytes)
{
using (var provider = new DESCryptoServiceProvider())
{
provider.Key = Key;
provider.IV = Iv;
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, provider.CreateEncryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
}
return memoryStream.ToArray();
}
}
}
public byte[] Decrypt(byte[] encryptedBytes)
{
using (var provider = new DESCryptoServiceProvider())
{
provider.Key = Key;
provider.IV = Iv;
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, provider.CreateDecryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(encryptedBytes, 0, encryptedBytes.Length);
cryptoStream.FlushFinalBlock();
}
return memoryStream.ToArray();
}
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = Encoding.UTF8.GetBytes(plainText);
var encryptedBytes = _desCryptoUtil.Encrypt(plainBytes);
var encryptedText = Convert.ToBase64String(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
[TestCase("ecIwYJUsLa0=")]
[TestCase("iPsXCjS+O0c=")]
public void Decrypt(string encryptedText)
{
var encryptedBytes = Convert.FromBase64String(encryptedText);
var plainBytes = _desCryptoUtil.Decrypt(encryptedBytes);
var plainText = Encoding.UTF8.GetString(plainBytes);
Console.WriteLine("Encrypted text:{0}, plain text:{1}", encryptedText, plainText);
}
高级加密标准 - Advanced Encryption Standard（AES）
简介
高级加密标准（英语：Advanced Encryption Standard，缩写：AES），在密码学中又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES，已经被多方分析且广为全世界所使用。经过五年的甄选流程，高级加密标准由美国国家标准与技术研究院（NIST）于2001年11月26日发布于FIPS PUB 197，并在2002年5月26日成为有效的标准。2006年，高级加密标准已然成为对称密钥加密中最流行的算法之一。
核心代码
public class AesCryptoUtil : IAesCryptoUtil
{
/// <summary>
/// A system key and the length should be 16.
/// You can use tool to generate the string on https://www.random.org/strings/ or other website.
/// </summary>
private const string SystemKeyPart = "84ImUeBn432oPkqo";
/// <summary>
/// A custom key and the lenth should between 4 and 16. You can use the project name as the custom key.
/// </summary>
private const string UserKeyPart = "AecCrypto";
/// <summary>
/// The combine key.
/// </summary>
private static readonly byte[] Key = Encoding.ASCII.GetBytes(UserKeyPart.PadRight(16, '#') + SystemKeyPart);
/// <summary>
/// Please indicate a random string here, and the length must be 16.
/// You can use tool to generate the string on https://www.random.org/strings/ or other website.
/// </summary>
private static readonly byte[] Iv = Encoding.ASCII.GetBytes("bCNtStALc7bRqREq");
public byte[] Encrypt(byte[] plainBytes)
{
return Encrypt(plainBytes, CipherMode.CBC, PaddingMode.PKCS7);
}
public byte[] Decrypt(byte[] encryptedBytes)
{
return Decrypt(encryptedBytes, CipherMode.CBC, PaddingMode.PKCS7);
}
private static byte[] Encrypt(byte[] plainBytes, CipherMode cipher, PaddingMode padding)
{
using (var aes = Rijndael.Create())
{
aes.Mode = cipher;
aes.Padding = padding;
using (var transform = aes.CreateEncryptor(Key, Iv))
{
var encryptedBytes = transform.TransformFinalBlock(plainBytes, 0, plainBytes.Length);
return encryptedBytes;
}
}
}
private static byte[] Decrypt(byte[] encryptedBytes, CipherMode cipher, PaddingMode padding)
{
using (var aes = Rijndael.Create())
{
aes.Mode = cipher;
aes.Padding = padding;
using (var transform = aes.CreateDecryptor(Key, Iv))
{
var plainBytes = transform.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);
return plainBytes;
}
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = Encoding.UTF8.GetBytes(plainText);
var encryptedBytes = _aesCryptoUtil.Encrypt(plainBytes);
var encryptedText = Convert.ToBase64String(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
[TestCase("HDHlYOQuENPmtjFKvLZIEA==")]
[TestCase("YO3ErLZ5/izaDgD0M0uYDg==")]
public void Decrypt(string encryptedText)
{
var encryptedBytes = Convert.FromBase64String(encryptedText);
var plainBytes = _aesCryptoUtil.Decrypt(encryptedBytes);
var plainText = Encoding.UTF8.GetString(plainBytes);
Console.WriteLine("Encrypted text:{0}, plain text:{1}", encryptedText, plainText);
}
消息摘要算法第五版 - Message-Digest Algorithm 5（MD5）
简介
MD5即Message-Digest Algorithm 5（信息-摘要算法5），用于确保信息传输完整一致。是计算机广泛使用的杂凑算法之一（又译摘要算法、哈希算法），主流编程语言普遍已有MD5实现。将数据（如汉字）运算为另一固定长度值，是杂凑算法的基础原理，MD5的前身有MD2、MD3和MD4。
MD5算法具有以下特点：
1、压缩性：任意长度的数据，算出的MD5值长度都是固定的。
2、容易计算：从原数据计算出MD5值很容易。
3、抗修改性：对原数据进行任何改动，哪怕只修改1个字节，所得到的MD5值都有很大区别。
4、强抗碰撞：已知原数据和其MD5值，想找到一个具有相同MD5值的数据（即伪造数据）是非常困难的。
注：MD5常用于密码加密。
核心代码
public class Md5CryptoUtil : IMd5CryptoUtil
{
public byte[] Encrypt(byte[] plainBytes)
{
using (var md5 = MD5.Create())
{
var encryptedBytes = md5.ComputeHash(plainBytes);
return encryptedBytes;
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = Encoding.UTF8.GetBytes(plainText);
var encryptedBytes = _md5CryptoUtil.Encrypt(plainBytes);
var stringBuilder = new StringBuilder();
foreach (var b in encryptedBytes)
{
stringBuilder.AppendFormat("{0:X2}", b);
}
var encryptedText = stringBuilder.ToString();
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
安全哈希算法 - Secure Hash Algorithm（SHA1）
简介
安全哈希算法（Secure Hash Algorithm）主要适用于数字签名标准 （Digital Signature Standard DSS）里面定义的数字签名算法（Digital Signature Algorithm DSA）。对于长度小于2^64位的消息，SHA1会产生一个160位的消息摘要。当接收到消息的时候，这个消息摘要可以用来验证数据的完整性。在传输的过程中，数据很可能会发生变化，那么这时候就会产生不同的消息摘要。 SHA1有如下特性：不可以从消息摘要中复原信息；两个不同的消息不会产生同样的消息摘要,(但会有1x10 ^ 48分之一的机率出现相同的消息摘要,一般使用时忽略)。
核心代码
public class Sha1CryptoUtil : ISha1CryptoUtil
{
public byte[] Encrypt(byte[] plainBytes)
{
using (var sha1 = SHA1.Create())
{
var encryptedBytes = sha1.ComputeHash(plainBytes);
return encryptedBytes;
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = _bytesUtil.FromString(plainText);
var encryptedBytes = _sha1CryptoUtil.Encrypt(plainBytes);
var encryptedText = _bytesUtil.ToHex(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
公钥加密算法（RSA）
简介
RSA公钥加密算法是1977年由罗纳德·李维斯特（Ron Rivest）、阿迪·萨莫尔（Adi Shamir）和伦纳德·阿德曼（Leonard Adleman）一起提出的。
RSA是目前最有影响力的公钥加密算法，它能够抵抗到目前为止已知的绝大多数密码攻击，已被ISO推荐为公钥数据加密标准。
RSA算法基于一个十分简单的数论事实：将两个大素数相乘十分容易，但是想要对其乘积进行因式分解却极其困难，因此可以将乘积公开作为加密密钥。
核心代码
public class RsaCryptoUtil : IRsaCryptoUtil
{
public RsaKey GenerateKeys()
{
using (var rsa = new RSACryptoServiceProvider())
{
var key = new RsaKey
{
Private = rsa.ToXmlString(true),
Public = rsa.ToXmlString(false)
};
return key;
}
}
public byte[] Sign(byte[] bytes, string privateKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(privateKey);
var signature = rsa.SignData(bytes, new MD5CryptoServiceProvider());
return signature;
}
}
public bool Verify(byte[] bytes, byte[] signature, string publicKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(publicKey);
return rsa.VerifyData(bytes, new MD5CryptoServiceProvider(), signature);
}
}
public byte[] Encrypt(byte[] plainBytes, string publicKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(publicKey);
var encryptedBytes = rsa.Encrypt(plainBytes, false);
return encryptedBytes;
}
}
public byte[] Decrypt(byte[] encryptedBytes, string privateKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(privateKey);
var decryptedBytes = rsa.Decrypt(encryptedBytes, false);
return decryptedBytes;
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Sign(string text)
{
var bytes = _bytesUtil.FromString(text);
var signatureBytes = _rsaCryptoUtil.Sign(bytes, _key.Private);
var signature = _bytesUtil.ToBase64(signatureBytes);
Console.WriteLine("Text:{0}, signature:{1}", text, signature);
}
[TestCase("123456", "T5BS2WHA2ZvDexuEIPRSbnB7SlC1blNPi4BGcwiGovE54bmAiLIqf6p9dmsMMS+wgyKX2JPKkiNKtzts+q1yVmosqqjcmrNZbP+YF9YNqbO4Da0CJRjH1rwCa+XC7cJFKIDn85KQqtLpdr7yong0SjtXA+cDMD3dP9RoZLb+k/k=")]
[TestCase("abcdef", "Gxf9LGx2AFmW114ex7nemDXIiEXkYmBA4bR0SMWp4M/uule171rtPIyZlX17CeNM2kmNKtxYAqsJj0Pfxb1znydtNLo/lFNkZDZkxAMx7uTLdw9Os4g5ZKXKkBbYi3aYBNY0bbICfetGRNGaGU4p8HlKm+KrijbURBKH6wE1DyI=")]
public void Verify(string text, string signature)
{
var bytes = _bytesUtil.FromString(text);
var signatureBytes = _bytesUtil.FromBase64(signature);
var isVerified = _rsaCryptoUtil.Verify(bytes, signatureBytes, _key.Public);
Console.WriteLine("Text:{0}, signature:{1}, is verified:{2}", text, signature, isVerified);
}
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = _bytesUtil.FromString(plainText);
var encryptedBytes = _rsaCryptoUtil.Encrypt(plainBytes, _key.Public);
var encryptedText = _bytesUtil.ToBase64(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
[TestCase("ZfT/2r0VqY6LX8eL+rfgufT/q+kMZsvRcDK6NafoHb+zvBN5KNxI5MAIG07Oqe3EiRH3yXrjKnePUiVvPJGW40xHm6S2yRBar61ZB3DONavwjlKQBBPGJNuW1S8aevdxFIGHazFjzv7FMCcJaAFrnNlZlkdsk67z0FbubPylPbY=")]
[TestCase("m8rS9i1DGE6MqW0L6vcS+lthiBzFTWrfK4XS97TDyC8t0xecNsLteIGEDgrzUMVf9j0ue0HpGHslYiOUAiX1wnFcVM0aX3SAZ1NmsIFEoYhz3av3lPj/tX9Ccirn7YhQw/N5BHwxPYT3ZcRfy+ozVXBo0EFDNGoJMcysfA0u5Uk=")]
public void Decrypt(string encryptedText)
{
var encryptedBytes = _bytesUtil.FromBase64(encryptedText);
var plainBytes = _rsaCryptoUtil.Decrypt(encryptedBytes, _key.Private);
var plainText = _bytesUtil.ToString(plainBytes);
Console.WriteLine("Encrypted text:{0}, plain text:{1}", encryptedText, plainText);
}
干扰项 - 盐（Salt）
简介
相同的明文用同样的加密方法（如MD5）进行加密会得到相同的密文。
如用MD5的方式加密“123456”，你总会得到密文“E10ADC3949BA59ABBE56E057F20F883E”。
那么，当数据库信息泄漏时，如果你的密码设置的比较简单，对方是很容易猜到你的密码，或者通过彩虹表来破解你的密码。
因此，你需要在明文中添加干扰项-盐（Salt）。
对于加盐的方式，我认为有两种。
1.对于只加密，但不解密的算法，如MD5，SHA1。我们需要把盐和密文都存在数据库中，用户输入密码时，我们把用户密码和盐组成新的明文，进行加密，然后得到密文，最后对比该密文是否与库中密文匹配。
2.对于可加解密的算法，我们可以定义一些规则，如明文前加长度为3的盐，在明文后加长度为5的盐，然后进行加密。解密的时候可以按预先设置的规则把盐去掉就能得到真正的明文。
核心代码
public class SaltUtil : ISaltUtil
{
public byte[] GenerateSalt(int size)
{
using (var rng = new RNGCryptoServiceProvider())
{
var salt = new byte[size];
rng.GetBytes(salt);
return salt;
}
}
}
调用示例
MD5
[TestCase("123456")]
[TestCase("abcdef")]
public void EncryptWithSalt(string plainText)
{
var plainBytes = _bytesUtil.FromString(plainText);
var headSalt = _saltUtil.GenerateSalt(SaltSetting.HeadSize);
var tailSalt = _saltUtil.GenerateSalt(SaltSetting.TailSize);
var plainBytesWithSalts = _bytesUtil.Combine(headSalt, plainBytes, tailSalt);
var encryptedBytes = _md5CryptoUtil.Encrypt(plainBytesWithSalts);
var encryptedText = _bytesUtil.ToHex(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
AES
[TestCase("123456")]
[TestCase("abcdef")]
public void EncryptWithSalt(string plainText)
{
var plainBytes = _bytesUtil.FromString(plainText);
var headSalt = _saltUtil.GenerateSalt(SaltSetting.HeadSize);
var tailSalt = _saltUtil.GenerateSalt(SaltSetting.TailSize);
var plainBytesWithSalts = _bytesUtil.Combine(headSalt, plainBytes, tailSalt);
var encryptedBytes = _aesCryptoUtil.Encrypt(plainBytesWithSalts);
var encryptedText = _bytesUtil.ToBase64(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
[TestCase("Leu9NnY9qA3/9u5uUZoXGQ==")]
[TestCase("eqcbaEOL9mHlQh3ERnGNeA==")]
public void DecryptWithSalt(string encryptedText)
{
var encryptedBytes = _bytesUtil.FromBase64(encryptedText);
var plainBytesWithSalts = _aesCryptoUtil.Decrypt(encryptedBytes);
var plainBytes = plainBytesWithSalts.Skip(SaltSetting.HeadSize).Take(plainBytesWithSalts.Length - SaltSetting.HeadSize - SaltSetting.TailSize).ToArray();
var plainText = _bytesUtil.ToString(plainBytes);
Console.WriteLine("Encrypted text:{0}, plain text:{1}", encryptedText, plainText);
}
RSA密钥格式Pkcs8
简介
对于RSA密钥的格式，不同的语言是不同的，如C#是xml格式，Java是二进制流，其他语言又可能是另外一种格式。为了解决这个问题，一种统一的密钥格式Pkcs8应运而生。
核心代码
public class RsaPkcs8CryptoUtil : IRsaCryptoUtil
{
public RsaKey GenerateKeys()
{
using (var rsa = new RSACryptoServiceProvider())
{
var keyPair = DotNetUtilities.GetRsaKeyPair(rsa);
var key = new RsaKey
{
Private = GeneratePrivateKey(keyPair.Private),
Public = GeneratePublicKey(keyPair.Public)
};
return key;
}
}
public byte[] Sign(byte[] bytes, string privateKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
var key = ParsePrivateKey(privateKey);
rsa.ImportParameters(key);
var signature = rsa.SignData(bytes, new MD5CryptoServiceProvider());
return signature;
}
}
public bool Verify(byte[] bytes, byte[] signature, string publicKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
var key = ParsePublicKey(publicKey);
rsa.ImportParameters(key);
return rsa.VerifyData(bytes, new MD5CryptoServiceProvider(), signature);
}
}
public byte[] Encrypt(byte[] plainBytes, string publicKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
var key = ParsePublicKey(publicKey);
rsa.ImportParameters(key);
var encryptedBytes = rsa.Encrypt(plainBytes, false);
return encryptedBytes;
}
}
public byte[] Decrypt(byte[] encryptedBytes, string privateKey)
{
using (var rsa = new RSACryptoServiceProvider())
{
var key = ParsePrivateKey(privateKey);
rsa.ImportParameters(key);
var decryptedBytes = rsa.Decrypt(encryptedBytes, false);
return decryptedBytes;
}
}
private static string GeneratePrivateKey(AsymmetricKeyParameter key)
{
var builder = new StringBuilder();
using (var writer = new StringWriter(builder))
{
var pkcs8Gen = new Pkcs8Generator(key);
var pemObj = pkcs8Gen.Generate();
var pemWriter = new PemWriter(writer);
pemWriter.WriteObject(pemObj);
}
return builder.ToString();
}
private static string GeneratePublicKey(AsymmetricKeyParameter key)
{
var builder = new StringBuilder();
using (var writer = new StringWriter(builder))
{
var pemWriter = new PemWriter(writer);
pemWriter.WriteObject(key);
}
return builder.ToString();
}
private static RSAParameters ParsePrivateKey(string privateKey)
{
using (var reader = new StringReader(privateKey))
{
var pemReader = new PemReader(reader);
var key = (RsaPrivateCrtKeyParameters)pemReader.ReadObject();
var parameter = new RSAParameters
{
Modulus = key.Modulus.ToByteArrayUnsigned(),
Exponent = key.PublicExponent.ToByteArrayUnsigned(),
D = key.Exponent.ToByteArrayUnsigned(),
P = key.P.ToByteArrayUnsigned(),
Q = key.Q.ToByteArrayUnsigned(),
DP = key.DP.ToByteArrayUnsigned(),
DQ = key.DQ.ToByteArrayUnsigned(),
InverseQ = key.QInv.ToByteArrayUnsigned()
};
return parameter;
}
}
private static RSAParameters ParsePublicKey(string publicKey)
{
using (var reader = new StringReader(publicKey))
{
var pemReader = new PemReader(reader);
var key = (RsaKeyParameters)pemReader.ReadObject();
var parameter = new RSAParameters
{
Modulus = key.Modulus.ToByteArrayUnsigned(),
Exponent = key.Exponent.ToByteArrayUnsigned()
};
return parameter;
}
}
}
调用示例
[TestCase("123456")]
[TestCase("abcdef")]
public void Sign(string text)
{
var bytes = _bytesUtil.FromString(text);
var signatureBytes = _rsaCryptoUtil.Sign(bytes, _key.Private);
var signature = _bytesUtil.ToBase64(signatureBytes);
Console.WriteLine("Text:{0}, signature:{1}", text, signature);
}
[TestCase("123456", "Pj4Z4P1ktNM+MLoqO3WUBZogZjVcjz5cvMVBJ741d2wq1X8UuI2AclZueltRahGHURiJ8djTYCSEGG1oHSc1K0ilk4lz40HFu1mqv65bwglqKrX2ks1wnwnBHusbfiu4HYXNy5HN/fcjB1ah8MxZSofxaGth1xAygY9bKkIBFS0=")]
[TestCase("abcdef", "UUOTnyWRU/b4CvALxw4VHusKBXjv32RTjuTVyZHeBaQKvlqVuMCwrdey0Z9wrh20GRspA2Je3uUfbFSxYStDnzVsXJLB3wtNvWX+NcE+h1g1LXijnediJKn6uh4UorCpVru0tZX3XrMJPeY5u8+ZBFMUP8zw078t7w1c60XpioQ=")]
public void Verify(string text, string signature)
{
var bytes = _bytesUtil.FromString(text);
var signatureBytes = _bytesUtil.FromBase64(signature);
var isVerified = _rsaCryptoUtil.Verify(bytes, signatureBytes, _key.Public);
Console.WriteLine("Text:{0}, signature:{1}, is verified:{2}", text, signature, isVerified);
}
[TestCase("123456")]
[TestCase("abcdef")]
public void Encrypt(string plainText)
{
var plainBytes = _bytesUtil.FromString(plainText);
var encryptedBytes = _rsaCryptoUtil.Encrypt(plainBytes, _key.Public);
var encryptedText = _bytesUtil.ToBase64(encryptedBytes);
Console.WriteLine("Plain text:{0}, encrypted text:{1}", plainText, encryptedText);
}
[TestCase("Ku82IhLYSuthVU1uN5NvUAFImWLwqaHmSuWA8dlTBLjYcJdGJmfY/BMK4JULBUauFDIyYHkFZ2j2oK+lQDw2UuXWbojLrnPZAvAbW+HB/5nuCS1mElVJr7YTq3tHb2mjcwAKx2qSnWgDO9V8akCnMMNVGLg9IN5gnjctlgu44iU=")]
[TestCase("hBWYekZUiEiPgQTgVtVB+Ax1UOa6tKkVk4UMU2CjwFpYoOndtJu/Frs/woRdvfJBZbD/lmMOpGoK35mlX9Y0RKrZdLRM0RG8/maiQQFWCM3ELgBWqYkdVLc4RQULxfWaVFuQolXWwVk+gCUaWeCaaMEBZ28dXiUP7npaWexEcB8=")]
public void Decrypt(string encryptedText)
{
var encryptedBytes = _bytesUtil.FromBase64(encryptedText);
var plainBytes = _rsaCryptoUtil.Decrypt(encryptedBytes, _key.Private);
var plainText = _bytesUtil.ToString(plainBytes);
Console.WriteLine("Encrypted text:{0}, plain text:{1}", encryptedText, plainText);
}
标签：AES,SHA1,encryptedBytes,key,plainBytes,var,new,密码学,public 来源： https://blog.csdn.net/qq_15427331/article/details/123594066