SM2、SM4加解密例子(vb.net开发语言)

Question

vb.net开发语言,想实现SM2和SM4加解密例子

Answer 1

在VB.NET中实现国密算法SM2和SM4，您可以使用第三方库，如Bouncy Castle。首先需要安装这个库，通过NuGet包管理器添加"BouncyCastle.Crypto"包。然后参考下面的代码示例实现SM2和SM4的加解密：

1. 导入相关命名空间：

Imports Org.BouncyCastle.Crypto
Imports Org.BouncyCastle.Crypto.Engines
Imports Org.BouncyCastle.Crypto.Parameters
Imports Org.BouncyCastle.Math
Imports Org.BouncyCastle.Security
Imports System.Text

1. SM2加解密示例：

Public Sub SM2_Encrypt_Decrypt_Example()
    Dim generator As AsymmetricCipherKeyPairGenerator = New SM2KeyPairGenerator()
    Dim random As SecureRandom = New SecureRandom()
    Dim pair As AsymmetricCipherKeyPair = generator.GenerateKeyPair()
    Dim publicKey As ECPublicKeyParameters = DirectCast(pair.Public, ECPublicKeyParameters)
    Dim privateKey As ECPrivateKeyParameters = DirectCast(pair.Private, ECPrivateKeyParameters)
    Dim message As String = "Hello SM2"
    Dim cipher As Cipher.Crypto.Abstractions.ICipher(Of AsymmetricKeyParameter, AsymmetricKeyParameter) _
                          = New Cipher.SM2.SM2Cipher()
 
    ' 加密
    Dim encryptedData As Byte() = cipher.Encrypt(Encoding.UTF8.GetBytes(message), publicKey, random)
    
    ' 解密
    Dim decryptedData As Byte() = cipher.Decrypt(encryptedData, privateKey)
    Dim decryptedMessage As String = Encoding.UTF8.GetString(decryptedData)
    
    Console.WriteLine("SM2加解密示例：")
    Console.WriteLine("原始消息: " & message)
    Console.WriteLine("解密消息: " & decryptedMessage)
End Sub