using System;
using System.Windows.Forms;
using nsoftware.SecureBlackbox;

namespace PDFDecryptorDemo
{
    public class EncPropsForm : Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.btnCancel = new System.Windows.Forms.Button();
            this.btnOK = new System.Windows.Forms.Button();
            this.gbEncProps = new System.Windows.Forms.GroupBox();
            this.lProvideCertificate = new System.Windows.Forms.Label();
            this.lProvidePassword = new System.Windows.Forms.Label();
            this.lMetadataStatus = new System.Windows.Forms.Label();
            this.tbCertPassword = new System.Windows.Forms.TextBox();
            this.btnBrowseCert = new System.Windows.Forms.Button();
            this.lCertPassword = new System.Windows.Forms.Label();
            this.lCertificate = new System.Windows.Forms.Label();
            this.tbCert = new System.Windows.Forms.TextBox();
            this.tbPassword = new System.Windows.Forms.TextBox();
            this.lEncryptionAlgorithm = new System.Windows.Forms.Label();
            this.openCertDialog = new System.Windows.Forms.OpenFileDialog();
            this.lInfo = new System.Windows.Forms.Label();
            this.gbEncProps.SuspendLayout();
            this.SuspendLayout();
            // 
            // btnCancel
            // 
            this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.btnCancel.Location = new System.Drawing.Point(204, 296);
            this.btnCancel.Name = "btnCancel";
            this.btnCancel.Size = new System.Drawing.Size(75, 23);
            this.btnCancel.TabIndex = 3;
            this.btnCancel.Text = "Cancel";
            // 
            // btnOK
            // 
            this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
            this.btnOK.Location = new System.Drawing.Point(124, 296);
            this.btnOK.Name = "btnOK";
            this.btnOK.Size = new System.Drawing.Size(75, 23);
            this.btnOK.TabIndex = 2;
            this.btnOK.Text = "OK";
            // 
            // gbEncProps
            // 
            this.gbEncProps.Controls.Add(this.lProvideCertificate);
            this.gbEncProps.Controls.Add(this.lProvidePassword);
            this.gbEncProps.Controls.Add(this.lMetadataStatus);
            this.gbEncProps.Controls.Add(this.tbCertPassword);
            this.gbEncProps.Controls.Add(this.btnBrowseCert);
            this.gbEncProps.Controls.Add(this.lCertPassword);
            this.gbEncProps.Controls.Add(this.lCertificate);
            this.gbEncProps.Controls.Add(this.tbCert);
            this.gbEncProps.Controls.Add(this.tbPassword);
            this.gbEncProps.Controls.Add(this.lEncryptionAlgorithm);
            this.gbEncProps.Location = new System.Drawing.Point(12, 45);
            this.gbEncProps.Name = "gbEncProps";
            this.gbEncProps.Size = new System.Drawing.Size(367, 243);
            this.gbEncProps.TabIndex = 1;
            this.gbEncProps.TabStop = false;
            // 
            // lProvideCertificate
            // 
            this.lProvideCertificate.AutoSize = true;
            this.lProvideCertificate.Location = new System.Drawing.Point(16, 129);
            this.lProvideCertificate.Name = "lProvideCertificate";
            this.lProvideCertificate.Size = new System.Drawing.Size(162, 13);
            this.lProvideCertificate.TabIndex = 4;
            this.lProvideCertificate.Text = "Provide certificate for decryption:";
            // 
            // lProvidePassword
            // 
            this.lProvidePassword.AutoSize = true;
            this.lProvidePassword.Location = new System.Drawing.Point(16, 78);
            this.lProvidePassword.Name = "lProvidePassword";
            this.lProvidePassword.Size = new System.Drawing.Size(161, 13);
            this.lProvidePassword.TabIndex = 2;
            this.lProvidePassword.Text = "Provide password for decryption:";
            // 
            // lMetadataStatus
            // 
            this.lMetadataStatus.AutoSize = true;
            this.lMetadataStatus.Location = new System.Drawing.Point(16, 45);
            this.lMetadataStatus.Name = "lMetadataStatus";
            this.lMetadataStatus.Size = new System.Drawing.Size(86, 13);
            this.lMetadataStatus.TabIndex = 1;
            this.lMetadataStatus.Text = "Metadata status:";
            // 
            // tbCertPassword
            // 
            this.tbCertPassword.Enabled = false;
            this.tbCertPassword.Location = new System.Drawing.Point(32, 211);
            this.tbCertPassword.Name = "tbCertPassword";
            this.tbCertPassword.PasswordChar = '*';
            this.tbCertPassword.Size = new System.Drawing.Size(128, 20);
            this.tbCertPassword.TabIndex = 9;
            // 
            // btnBrowseCert
            // 
            this.btnBrowseCert.Enabled = false;
            this.btnBrowseCert.Location = new System.Drawing.Point(286, 163);
            this.btnBrowseCert.Name = "btnBrowseCert";
            this.btnBrowseCert.Size = new System.Drawing.Size(75, 27);
            this.btnBrowseCert.TabIndex = 7;
            this.btnBrowseCert.Text = "Browse...";
            this.btnBrowseCert.Click += new System.EventHandler(this.btnBrowseCert_Click);
            // 
            // lCertPassword
            // 
            this.lCertPassword.AutoSize = true;
            this.lCertPassword.Enabled = false;
            this.lCertPassword.Location = new System.Drawing.Point(32, 195);
            this.lCertPassword.Name = "lCertPassword";
            this.lCertPassword.Size = new System.Drawing.Size(105, 13);
            this.lCertPassword.TabIndex = 8;
            this.lCertPassword.Text = "Certificate password:";
            // 
            // lCertificate
            // 
            this.lCertificate.AutoSize = true;
            this.lCertificate.Enabled = false;
            this.lCertificate.Location = new System.Drawing.Point(32, 149);
            this.lCertificate.Name = "lCertificate";
            this.lCertificate.Size = new System.Drawing.Size(110, 13);
            this.lCertificate.TabIndex = 5;
            this.lCertificate.Text = "Decryption certificate:";
            // 
            // tbCert
            // 
            this.tbCert.Enabled = false;
            this.tbCert.Location = new System.Drawing.Point(32, 167);
            this.tbCert.Name = "tbCert";
            this.tbCert.Size = new System.Drawing.Size(248, 20);
            this.tbCert.TabIndex = 6;
            // 
            // tbPassword
            // 
            this.tbPassword.Location = new System.Drawing.Point(35, 97);
            this.tbPassword.Name = "tbPassword";
            this.tbPassword.PasswordChar = '*';
            this.tbPassword.Size = new System.Drawing.Size(128, 20);
            this.tbPassword.TabIndex = 3;
            // 
            // lEncryptionAlgorithm
            // 
            this.lEncryptionAlgorithm.AutoSize = true;
            this.lEncryptionAlgorithm.Location = new System.Drawing.Point(16, 19);
            this.lEncryptionAlgorithm.Name = "lEncryptionAlgorithm";
            this.lEncryptionAlgorithm.Size = new System.Drawing.Size(105, 13);
            this.lEncryptionAlgorithm.TabIndex = 0;
            this.lEncryptionAlgorithm.Text = "Encryption algorithm:";
            // 
            // openCertDialog
            // 
            this.openCertDialog.Filter = "Raw X.509 certificate (*.cer, *.csr, *.crt)|*.CER;*.CSR;*.CRT|Base64-encoded X.50" +
    "9 certificate (*.pem)|*.PEM|PKCS#12 certificate (*.pfx, *.p12)|*.PFX; *.P12|All " +
    "files (*.*)|*.*";
            this.openCertDialog.InitialDirectory = ".";
            // 
            // lInfo
            // 
            this.lInfo.ForeColor = System.Drawing.SystemColors.Highlight;
            this.lInfo.Location = new System.Drawing.Point(9, 9);
            this.lInfo.Name = "lInfo";
            this.lInfo.Size = new System.Drawing.Size(371, 35);
            this.lInfo.TabIndex = 0;
            this.lInfo.Text = "The PDF document is encrypted. Depending on the document\'s encryption type you wo" +
    "uld need to provide a decryption password or decryption certificate.";
            this.lInfo.UseMnemonic = false;
            // 
            // EncPropsForm
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(389, 327);
            this.Controls.Add(this.lInfo);
            this.Controls.Add(this.btnCancel);
            this.Controls.Add(this.btnOK);
            this.Controls.Add(this.gbEncProps);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
            this.Name = "EncPropsForm";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
            this.Text = "Encryption properties";
            this.gbEncProps.ResumeLayout(false);
            this.gbEncProps.PerformLayout();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button btnCancel;
        private System.Windows.Forms.Button btnOK;
        private System.Windows.Forms.GroupBox gbEncProps;
        private System.Windows.Forms.TextBox tbCertPassword;
        private System.Windows.Forms.Button btnBrowseCert;
        private System.Windows.Forms.Label lCertPassword;
        private System.Windows.Forms.Label lCertificate;
        private System.Windows.Forms.TextBox tbCert;
        private System.Windows.Forms.TextBox tbPassword;
        private System.Windows.Forms.OpenFileDialog openCertDialog;
        private System.Windows.Forms.Label lProvideCertificate;
        private System.Windows.Forms.Label lProvidePassword;
        private System.Windows.Forms.Label lMetadataStatus;
        private System.Windows.Forms.Label lInfo;
        private System.Windows.Forms.Label lEncryptionAlgorithm;

        public EncPropsForm()
        {
            InitializeComponent();
        }

        private void btnBrowseCert_Click(object sender, EventArgs e)
        {
            openCertDialog.FileName = tbCert.Text;
            if (openCertDialog.ShowDialog() == DialogResult.OK)
                tbCert.Text = openCertDialog.FileName;
        }

        private int m_Count = 0;

        public void SetPDFEncryptionProps(PDFDecryptor PDFDecryptor)
        {
            string Alg = PDFDecryptor.DocumentInfo.EncryptionAlgorithm;
            if (Alg == "RC4")
            {
                Alg = Alg + "/" + PDFDecryptor.Config("RC4KeyBits");
            }

            lEncryptionAlgorithm.Text = "Encryption algorithm: " + Alg;
            if (PDFDecryptor.DocumentInfo.EncryptionType == PDFEncryptionTypes.petPassword)
            {
                if (m_Count > 0)
                    MessageBox.Show("Invalid password", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);

                if (PDFDecryptor.DocumentInfo.MetadataEncrypted)
                    lMetadataStatus.Text = "Metadata status: encrypted";
                else
                    lMetadataStatus.Text = "Metadata status: not encrypted";

                lProvidePassword.Enabled = true;
                tbPassword.Enabled = true;
                lProvideCertificate.Enabled = false;
                tbCert.Enabled = false;
                tbCertPassword.Enabled = false;
                btnBrowseCert.Enabled = false;
            }
            else
            {
                lMetadataStatus.Text = ""; // metadata status could be read only after decryption

                lProvidePassword.Enabled = false;
                tbPassword.Enabled = false;
                lProvideCertificate.Enabled = true;
                tbCert.Enabled = true;
                tbCertPassword.Enabled = true;
                btnBrowseCert.Enabled = true;
            }
        }

        public Certificate LoadCertificate(string file, string password)
        {
            Certificate cert = null;

            if (file.Length > 0)
            {
                try
                {
                    CertificateManager certmanager = new CertificateManager();

                    certmanager.ImportFromFile(file, password);

                    cert = certmanager.Certificate;
                }
                catch (Exception e)
                {
                    MessageBox.Show("Cannot load certificate!");
                }
            }

            return cert;
        }

        public void GetPDFDecryptionInfo(PDFDecryptor PDFDecryptor)
        {
            if (PDFDecryptor.DocumentInfo.EncryptionType == PDFEncryptionTypes.petPassword)
                PDFDecryptor.Password = tbPassword.Text;
            else
            {
                try
                {
                    PDFDecryptor.DecryptionCertificate = LoadCertificate(tbCert.Text, tbCertPassword.Text);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }

                m_Count++;
            }
        }
    }
}