使用RMS API 自定义Office（Word、Excel、PPT）加密策略

什么是RMS：

Microsoft Windows Rights Management 服务 (RMS），是一种与应用程序协作来保护数字内容（不论其何去何从）的安全技术，专为那些需要保护敏感的 Web 内容、文档和电子邮件的用户而设计。用户可以严格规定哪些用户可以打开、读取、修改和重新分发特定内容。组织可以创建权限策略模板，以实施用户应用于内容的策略。

准备工作1：

下载并添加引用以下3个DLL：

Microsoft.Office.Interop.Excel.dll

Microsoft.Office.Interop.PowerPoint.dll

Microsoft.Office.Interop.Word.dll

并在dll的属性中，把“嵌入互操作类型”设为False

添加以下引用：

在添加引用-程序集-扩展中，引用office       ,(或引用Microsoft Office 14.0 Object Library)

在添加引用-程序集-框架中，引用PresentationCore和PresentationFramework

准备工作2：

打开word或者Excel等office文件，在信息-保护文档-限制访问-选择连接到权限管理服务器并获取模版，登陆域账号，后续在RMS加密工作将会使用这个域账号进行：

 

代码：

EncryptFile.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Office.Core;

namespace WindowsFormsApplication1
{
    class EncryptFile
    {



        /// <summary>
        /// 加密Word
        /// </summary>
        /// <param name="filemodel">文件属性</param>
        /// <param name="path">文件路径</param>
        /// <returns>加密结果</returns>
        public static bool EncryptWord(RMSFileModel filemodel, string path)
        {
            var wordClass = new Microsoft.Office.Interop.Word.ApplicationClass();
            Microsoft.Office.Interop.Word.Document mydoc = wordClass.Documents.Open(filemodel.FSourcePath);
            try
            {
                DateTime exprieDateTime = new DateTime(2027, 05, 19);
                if (mydoc != null)
                {
                    mydoc.Activate();
                    var irmPremission = mydoc.Permission;
                    if (irmPremission.Enabled == true)
                    {
                        filemodel.FErrorMessage = "加密已加密的Word时错误";
                        filemodel.FContent = "当前文档已经加密，操作失败!";
                        return false;
                    }
                    mydoc.Application.Visible = false;
                    irmPremission.Enabled = true;
                    if (filemodel.Users != null && filemodel.Users.Length > 0)
                    {
                        foreach (var item in filemodel.Users)
                        {
                            if (!String.IsNullOrEmpty(ObjIsEmail(item)))
                            {
                                if (filemodel.FIsFullControl)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionFullControl, exprieDateTime);
                                }
                                if (filemodel.FIsPrint)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionPrint, exprieDateTime);
                                }
                                if (filemodel.FIsRead)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionRead, exprieDateTime);
                                }
                                if (filemodel.FIsSave)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionSave, exprieDateTime);
                                }
                                if (filemodel.FIsEdit)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionEdit, exprieDateTime);
                                }
                            }
                        }
                    }
                    else
                    {
                        irmPremission.Add("Everyone", MsoPermission.msoPermissionEdit, exprieDateTime);
                    }
                }

                string tempPath = path + filemodel.FTitle;
                mydoc.SaveAs(tempPath);
                filemodel.FRMSPath = tempPath;
                filemodel.FContent = "加密成功";
                return true;
            }
            catch (Exception ex)
            {
                filemodel.FErrorMessage = "加密Word时错误";
                filemodel.FContent = ex.ToString();
                return false;
            }
            finally
            {
                mydoc.Close();
                wordClass.Quit();
            }
        }

        /// <summary>
        /// 加密Excel
        /// </summary>
        /// <param name="filemodel">文件属性</param>
        /// <param name="path">文件路径</param>
        /// <returns>加密结果</returns>
        public static bool EncryptExcel(RMSFileModel filemodel, string path)
        {
            var excelClass = new Microsoft.Office.Interop.Excel.ApplicationClass();
            var myExecl = excelClass.Workbooks.Open(filemodel.FSourcePath);
            try
            {
                DateTime exprieDateTime = new DateTime(2027, 05, 19);
                if (myExecl != null)
                {
                    myExecl.Activate();
                    var irmPremission = myExecl.Permission;
                    if (irmPremission.Enabled == true)
                    {
                        filemodel.FErrorMessage = "加密已加密的Excel时错误";
                        filemodel.FContent = "当前文档已经加密，操作失败!";
                        return false;
                    }
                    myExecl.Application.Visible = false;
                    irmPremission.Enabled = true;
                    if (filemodel.Users != null && filemodel.Users.Length > 0)
                    {
                        foreach (var item in filemodel.Users)
                        {
                            if (!String.IsNullOrEmpty(ObjIsEmail(item)))
                            {
                                if (filemodel.FIsFullControl)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionFullControl, exprieDateTime);
                                }
                                if (filemodel.FIsPrint)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionPrint, exprieDateTime);
                                }
                                if (filemodel.FIsRead)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionRead, exprieDateTime);
                                }
                                if (filemodel.FIsSave)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionSave, exprieDateTime);
                                }
                                if (filemodel.FIsEdit)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionEdit, exprieDateTime);
                                }
                            }
                        }
                    }
                    else
                    {
                        irmPremission.Add("Everyone", MsoPermission.msoPermissionEdit, exprieDateTime);
                    }
                }
                string tempPath = path + filemodel.FTitle;
                myExecl.SaveAs(tempPath);
                filemodel.FRMSPath = tempPath;
                filemodel.FContent = "加密成功";
                return true;
            }
            catch (Exception ex)
            {
                filemodel.FErrorMessage = "加密Excel时错误";
                filemodel.FContent = ex.ToString();
                return false;
            }
            finally
            {
                myExecl.Close();
                excelClass.Quit();
            }
        }

        /// <summary>
        /// 加密PPT
        /// </summary>
        /// <param name="filemodel">文件属性</param>
        /// <param name="path">文件路径</param>
        /// <returns>加密结果</returns>
        public static bool EncryptPPT(RMSFileModel filemodel, string path)
        {
            var pptClass = new Microsoft.Office.Interop.PowerPoint.ApplicationClass();
            var myppt = pptClass.Presentations.Open(filemodel.FSourcePath, MsoTriState.msoCTrue, MsoTriState.msoCTrue, MsoTriState.msoFalse);
            try
            {
                DateTime exprieDateTime = new DateTime(2027, 05, 19);
                if (myppt != null)
                {
                    //myppt.Activate();
                    var irmPremission = myppt.Permission;
                    if (irmPremission.Enabled == true)
                    {
                        filemodel.FErrorMessage = "加密已加密的Excel时错误";
                        filemodel.FContent = "当前文档已经加密，操作失败!";
                        return false;
                    }
                    //myppt.Application.Visible = false;
                    irmPremission.Enabled = true;
                    if (filemodel.Users != null && filemodel.Users.Length > 0)
                    {
                        foreach (var item in filemodel.Users)
                        {
                            if (!String.IsNullOrEmpty(ObjIsEmail(item)))
                            {
                                if (filemodel.FIsFullControl)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionFullControl, exprieDateTime);
                                }
                                if (filemodel.FIsPrint)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionPrint, exprieDateTime);
                                }
                                if (filemodel.FIsRead)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionRead, exprieDateTime);
                                }
                                if (filemodel.FIsSave)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionSave, exprieDateTime);
                                }
                                if (filemodel.FIsEdit)
                                {
                                    irmPremission.Add(item, MsoPermission.msoPermissionEdit, exprieDateTime);
                                }
                            }
                        }
                    }
                    else
                    {
                        irmPremission.Add("Everyone", MsoPermission.msoPermissionEdit, exprieDateTime);
                    }
                }
                string tempPath = path + filemodel.FTitle;
                myppt.SaveAs(tempPath);
                filemodel.FRMSPath = tempPath;
                filemodel.FContent = "加密成功";
                return true;
            }
            catch (Exception ex)
            {
                filemodel.FErrorMessage = "加密PPT时错误";
                filemodel.FContent = ex.ToString();
                return false;
            }
            finally
            {
                myppt.Close();
                pptClass.Quit();
            }
        }

        /// <summary>
        /// 清理Office进程
        /// </summary>
        public static void KillOfficeProcess()
        {
            try
            {
                var proWord = System.Diagnostics.Process.GetProcessesByName("WinWord");
                foreach (var word in proWord)
                {
                    word.Kill();
                }
                var proExcel = System.Diagnostics.Process.GetProcessesByName("Excel");
                foreach (var excel in proExcel)
                {
                    excel.Kill();
                }
                var proPPT = System.Diagnostics.Process.GetProcessesByName("POWERPNT");
                foreach (var ppt in proPPT)
                {
                    ppt.Kill();
                }
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// Object判断并转为Email（String格式）
        /// </summary>
        /// <param name="o">Object</param>
        /// <returns>Email</returns>
        public static string ObjIsEmail(object o)
        {
            string email = ObjToStr(o);
            if (!String.IsNullOrEmpty(email))
            {
                if (email.IndexOf("@") > -1)
                {
                    return email;
                }
                else
                {
                    return "";
                }
            }
            else
            {
                return "";
            }
        }

        /// <summary>
        /// Object转String
        /// </summary>
        /// <param name="o">Object</param>
        /// <returns>String</returns>
        public static string ObjToStr(object o)
        {
            if (o == null)
            {
                return "";
            }
            else
            {
                return o.ToString();
            }
        }
    }
}

 

RMSFileModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WindowsFormsApplication1
{
    public class RMSFileModel
    {
        /// <summary>
        /// 文件ID
        /// </summary>
        public int FID { get; set; }
        /// <summary>
        /// 完全控制
        /// </summary>
        public bool FIsFullControl { get; set; }
        /// <summary>
        /// 只读
        /// </summary>
        public bool FIsRead { get; set; }
        /// <summary>
        /// 打印
        /// </summary>
        public bool FIsPrint { get; set; }
        /// <summary>
        /// 另存
        /// </summary>
        public bool FIsSave { get; set; }
        /// <summary>
        /// 编辑
        /// </summary>
        public bool FIsEdit { get; set; }
        /// <summary>
        /// 文件名
        /// </summary>
        public string FTitle { get; set; }
        /// <summary>
        /// 在线URL路径（源文件路径）
        /// </summary>
        public string FUrlSourcePath { get; set; }
        /// <summary>
        /// 在线URL路径（加密后的文件路径）
        /// </summary>
        public string FUrlRMSPath { get; set; }
        /// <summary>
        /// 应用到用户
        /// </summary>
        public string[] Users { get; set; }
        /// <summary>
        /// 加密状态
        /// </summary>
        public string FState { get; set; }
        /// <summary>
        /// 加密错误分类
        /// </summary>
        public string FErrorMessage { get; set; }
        /// <summary>
        /// 加密详情
        /// </summary>
        public string FContent { get; set; }
        /// <summary>
        /// 本地物理路径（源文件）
        /// </summary>
        public string FSourcePath { get; set; }
        /// <summary>
        /// 本地物理路径（加密后的文件）
        /// </summary>
        public string FRMSPath { get; set; }
    }
}

 

调用：

 

/// <summary>
        /// 执行加密操作
        /// </summary>
        /// <param name="fileModel">文件属性</param>
        /// <returns>加密结果</returns>
        private bool HandleRMS(RMSFileModel fileModel)
        {
            try
            {
                //确认路径及创建文件夹
                string path = System.Windows.Forms.Application.StartupPath + "\App_Data\RMSFile\";
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                //清理Office进程
                EncryptFile.KillOfficeProcess();
                string extension = Path.GetExtension(fileModel.FSourcePath).ToLower();//获取扩展名
                if (extension.IndexOf("doc") > -1)
                {
                    return Common.EncryptFile.EncryptWord(fileModel, path);
                }
                if (extension.IndexOf("xls") > -1)
                {
                    return Common.EncryptFile.EncryptExcel(fileModel, path);
                }
                if (extension.IndexOf("ppt") > -1)
                {
                    return Common.EncryptFile.EncryptPPT(fileModel, path);
                }
                fileModel.FErrorMessage = "格式错误";
                fileModel.FContent = "无法加密该格式的文件";
                return false;
            }
            catch (Exception ex)
            {
                fileModel.FErrorMessage = "获取文件扩展名错误";
                fileModel.FContent = ex.ToString();
                return false;
            }
        }

谢谢！