43 lines
1.0 KiB
Plaintext
43 lines
1.0 KiB
Plaintext
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dnspy
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DES Encrypt
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key,iv: Encoding.ASCII.GetBytes("ABugger2");
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加密结果以base64形式表示
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检查Key文本框是否为空
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检查DES加密(Key文本)==license文件内容
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检查DES加密(license文件路径)=="DIYCtpqJYWygsw1V7MbQdyxPnWMKkR4/"
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通过解密可得：
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license文件需要放C:\CrackMes\File
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其内容为DES加密的key的Base64，key和iv上面写了
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private void btnCheck_Click(object sender, EventArgs e)
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{
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if (this.open.ShowDialog() == DialogResult.OK)
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{
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string fileName = this.open.FileName;
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try
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{
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string text;
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using (StreamReader streamReader = new StreamReader(fileName))
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{
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text = streamReader.ReadLine();
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}
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if (this.txtName.Text != "" && Form1.EncryptDES(this.txtName.Text) == text && Form1.EncryptDES(fileName) == "DIYCtpqJYWygsw1V7MbQdyxPnWMKkR4/")
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{
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this.lblMode.Text = "Trial mode";
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this.lblMode.ForeColor = Color.Green;
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}
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else
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{
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MessageBox.Show("KeyFile is invalid");
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}
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}
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catch
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{
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MessageBox.Show("I can't open file! :(");
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}
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}
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}
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