asp.net如何?數位簽章(DSACryptoServiceProvider)

數位簽章簡單的說過程如下：

寄件者A向接受者B發送資料，A首先將資料進行散列函數運算，產生資訊摘要，然後用私密金鑰進行加密，產生簽名資訊，A將要發送的資訊與簽名資訊一起發送給B，B接收到後，也將資料進行散列運行，並產生資訊摘要，然後用公開金鑰與簽名進行驗證核對資訊是否被撰改。

asp.net實現數位簽章執行個體代碼：

需引入命名空間：using System.Security.Cryptography;

以下為引用的內容：  /// <summary>     /// 產生簽名     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     protected void Button1_Click(object sender, EventArgs e)     {         DSACryptoServiceProvider objdsa = new DSACryptoServiceProvider();         objdsa.FromXmlString(tbxKey.Text);         byte[] source = System.Text.UTF8Encoding.UTF8.GetBytes(tbxContent.Text);         //數位簽章         tbxSign.Text = BitConverter.ToString(objdsa.SignData(source));     }     /// <summary>     /// 隨機產生密鑰     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     protected void btncreateMY_Click(object sender, EventArgs e)     {         DSACryptoServiceProvider objdsa = new DSACryptoServiceProvider();         tbxcreateMY_publicKey.Text = objdsa.ToXmlString(false);         tbxcreateMY_key.Text = objdsa.ToXmlString(true);     }     /// <summary>     /// 驗證簽名     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     protected void Button3_Click(object sender, EventArgs e)     {         DSACryptoServiceProvider objdsa = new DSACryptoServiceProvider();         byte[] fileHashValue = new SHA1CryptoServiceProvider().ComputeHash(System.Text.UTF8Encoding.UTF8.GetBytes(tbxContentYZ.Text));                string[] strSplit = tbxSignYZ.Text.Split('-');         byte[] SignedHash = new byte[strSplit.Length];         for (int i = 0; i < strSplit.Length; i++)             SignedHash[i] = byte.Parse(strSplit[i], System.Globalization.NumberStyles.AllowHexSpecifier);         objdsa.FromXmlString(tbxPublickeyYZ.Text);         bool ret = objdsa.VerifySignature(fileHashValue, SignedHash);         Qcd.Core.Web.Messages.ShowDialog(ret.ToString());     }

html頁面代碼:

以下為引用的內容：   <form id="form1" runat="server">         隨機產生密鑰：<asp:Button ID="btncreateMY" runat="server" Text="隨機產生密鑰" OnClick="btncreateMY_Click" /><br />         公開金鑰：<asp:TextBox ID="tbxcreateMY_publicKey" runat="server" TextMode="MultiLine" Height="59px" ReadOnly="True" Width="711px"></asp:TextBox><br />         私密金鑰：<asp:TextBox ID="tbxcreateMY_key" runat="server" TextMode="MultiLine" Height="59px" ReadOnly="True" Width="710px"></asp:TextBox><br /><hr />         <br />         產生簽名：<br />         原文：&nbsp;         <asp:TextBox ID="tbxContent" runat="server" TextMode="MultiLine" Height="59px" Width="711px"></asp:TextBox>&nbsp;<br />         私密金鑰：         <asp:TextBox ID="tbxKey" runat="server" TextMode="MultiLine" Height="59px" Width="711px"></asp:TextBox><br />         簽名：         <asp:TextBox ID="tbxSign" runat="server" TextMode="MultiLine" Height="59px" ReadOnly="True" Width="711px"></asp:TextBox>         <br />         <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="產生簽名" />         <br />         <br /><hr />         <br />         驗證簽名：<br />         原文：<asp:TextBox ID="tbxContentYZ" runat="server" TextMode="MultiLine" Height="59px" Width="711px"></asp:TextBox><br />         公開金鑰：<asp:TextBox ID="tbxPublickeyYZ" runat="server" TextMode="MultiLine" Height="59px" Width="711px"></asp:TextBox><br />         簽名：<asp:TextBox ID="tbxSignYZ" runat="server" TextMode="MultiLine" Height="59px" Width="711px"></asp:TextBox>         <br />                 <asp:Button ID="Button3" runat="server" OnClick="Button3_Click" Text="驗證簽名" />     </form>

 

http://www.cn-web.com/shtml/article/net/quer/2009/07/28/921.shtml