如何在C#中使用BouncyCastle dll签署文件 [英] how can sign a file with BouncyCastle dll in c#
本文介绍了如何在C#中使用BouncyCastle dll签署文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我从BouncyCastle Crypto dll开始,但找不到足够的文档。
我需要一个示例,说明如何使用不同的算法对文件进行签名
像sha1 sha256和其他文件一样,并获取.p7m文件。
有人可以帮助我吗?
预先感谢
Piercarlo
I starting with BouncyCastle Crypto dll and I'n not found enought documentation. I need one example of how can I sign a file with different alghoritms Like sha1 sha256 and other and obtain .p7m file. Can somebody help to me ? Many thanks in advance Piercarlo
推荐答案
我为您整理了这个小例子:
I put together this little example for you:
using System;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using Org.BouncyCastle.Cms;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.X509;
namespace ConsoleApplicationSignWithBouncyCastle
{
class Program
{
[STAThread]
static void Main(string[] args)
{
try
{
// First load a Certificate, filename/path and certificate password
Cert = ReadCertFromFile("./test.pfx", "test");
// Select a binary file
var dialog = new OpenFileDialog
{
Filter = "All files (*.*)|*.*",
InitialDirectory = "./",
Title = "Select a text file"
};
var filename = (dialog.ShowDialog() == DialogResult.OK) ? dialog.FileName : null;
// Get the file
var f = new FileStream(filename, System.IO.FileMode.Open);
// Reading through this code stub to be sure I get it all :-) [ Different subject entirely ]
var fileContent = ReadFully(f);
// Create the generator
var dataGenerator = new CmsEnvelopedDataStreamGenerator();
// Add receiver
// Cert is the user's X.509 Certificate set bellow
dataGenerator.AddKeyTransRecipient(Cert);
// Make the output stream
var outStream = new FileStream(filename + ".p7m", FileMode.Create);
// Sign the stream
var cryptoStream = dataGenerator.Open(outStream, CmsEnvelopedGenerator.Aes128Cbc);
// Store in our binary stream writer and write the signed content
var binWriter = new BinaryWriter(cryptoStream);
binWriter.Write(fileContent);
}
catch (Exception ex)
{
Console.WriteLine("So, you wanna make an exception huh! : " + ex.ToString());
Console.ReadKey();
}
}
public static byte[] ReadFully(Stream stream)
{
stream.Seek(0, 0);
var buffer = new byte[32768];
using (var ms = new MemoryStream())
{
while (true)
{
int read = stream.Read(buffer, 0, buffer.Length);
if (read <= 0)
return ms.ToArray();
ms.Write(buffer, 0, read);
}
}
}
public static Org.BouncyCastle.X509.X509Certificate Cert { get; set; }
// This reads a certificate from a file.
// Thanks to: http://blog.softwarecodehelp.com/2009/06/23/CodeForRetrievePublicKeyFromCertificateAndEncryptUsingCertificatePublicKeyForBothJavaC.aspx
public static X509Certificate ReadCertFromFile(string strCertificatePath, string strCertificatePassword)
{
try
{
// Create file stream object to read certificate
var keyStream = new FileStream(strCertificatePath, FileMode.Open, FileAccess.Read);
// Read certificate using BouncyCastle component
var inputKeyStore = new Pkcs12Store();
inputKeyStore.Load(keyStream, strCertificatePassword.ToCharArray());
//Close File stream
keyStream.Close();
var keyAlias = inputKeyStore.Aliases.Cast<string>().FirstOrDefault(n => inputKeyStore.IsKeyEntry(n));
// Read Key from Alieases
if (keyAlias == null)
throw new NotImplementedException("Alias");
//Read certificate into 509 format
return (X509Certificate)inputKeyStore.GetCertificate(keyAlias).Certificate;
}
catch (Exception ex)
{
Console.WriteLine("So, you wanna make an exception huh! : " + ex.ToString());
Console.ReadKey();
return null;
}
}
} }
希望这会有所帮助。
我还在我的博客上发布了。
这篇关于如何在C#中使用BouncyCastle dll签署文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文