hanfeng988914 2021-07-08 13:04 采纳率: 0%
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SM2、SM4加解密例子(vb.net开发语言)

vb.net开发语言,想实现SM2和SM4加解密例子

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  • 流水不腐程序 2023-06-14 10:39
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    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
    
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