使用 BouncyCastle 使用 RSA 对数据进行 C# 签名
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8830510/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
C# Sign Data with RSA using BouncyCastle
提问by w.donahue
Does anyone know of a simple tutorial or sample code of how to sign data in c# using bouncy castle. In Java there are tons of tutorials and samples. I can't find a single example in c#. Does anyone know how to do this?
有谁知道如何使用充气城堡在 c# 中签署数据的简单教程或示例代码。在 Java 中有大量的教程和示例。我在 c# 中找不到单个示例。有谁知道如何做到这一点？
采纳答案by w.donahue
Okay I could not find any documentation on how to do this. But I ended up figuring it out. I am pasting the full code here so hopefully it can help someone in the future.
好吧，我找不到有关如何执行此操作的任何文档。但我最终弄清楚了。我在这里粘贴了完整的代码，希望它可以在将来对某人有所帮助。
This class will calculate a RSA signature with a sha1 hash for the provided string and verify it as well.
此类将使用提供的字符串的 sha1 哈希计算 RSA 签名并对其进行验证。
using System;
using System.IO;
using System.Text;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities.Encoders;
namespace API.Crypto
{
public class RsaSha1Signing
{
private RsaKeyParameters MakeKey(String modulusHexString, String exponentHexString, bool isPrivateKey)
{
var modulus = new Org.BouncyCastle.Math.BigInteger(modulusHexString, 16);
var exponent = new Org.BouncyCastle.Math.BigInteger(exponentHexString, 16);
return new RsaKeyParameters(isPrivateKey, modulus, exponent);
}
public String Sign(String data, String privateModulusHexString, String privateExponentHexString)
{
/* Make the key */
RsaKeyParameters key = MakeKey(privateModulusHexString, privateExponentHexString, true);
/* Init alg */
ISigner sig = SignerUtilities.GetSigner("SHA1withRSA");
/* Populate key */
sig.Init(true, key);
/* Get the bytes to be signed from the string */
var bytes = Encoding.UTF8.GetBytes(data);
/* Calc the signature */
sig.BlockUpdate(bytes, 0, bytes.Length);
byte[] signature = sig.GenerateSignature();
/* Base 64 encode the sig so its 8-bit clean */
var signedString = Convert.ToBase64String(signature);
return signedString;
}
public bool Verify(String data, String expectedSignature, String publicModulusHexString, String publicExponentHexString)
{
/* Make the key */
RsaKeyParameters key = MakeKey(publicModulusHexString, publicExponentHexString, false);
/* Init alg */
ISigner signer = SignerUtilities.GetSigner("SHA1withRSA");
/* Populate key */
signer.Init(false, key);
/* Get the signature into bytes */
var expectedSig = Convert.FromBase64String(expectedSignature);
/* Get the bytes to be signed from the string */
var msgBytes = Encoding.UTF8.GetBytes(data);
/* Calculate the signature and see if it matches */
signer.BlockUpdate(msgBytes, 0, msgBytes.Length);
return signer.VerifySignature(expectedSig);
}
}
}
回答by Regfor
Look at Bouncy Castle web site. There is archive with sources and examples. http://www.bouncycastle.org/csharp/download/bccrypto-net-1.7-src-ext.zip
查看充气城堡网站。有包含来源和示例的存档。 http://www.bouncycastle.org/csharp/download/bccrypto-net-1.7-src-ext.zip
As a examples there are a lot of NUnit tests. Below is code of method to encrypt data byte array using RSA algorithm as a sample, but in Bouncy Castle sources and tests you can find more samples.
例如，有很多 NUnit 测试。下面是使用 RSA 算法加密数据字节数组的方法代码作为示例，但在 Bouncy Castle 源代码和测试中，您可以找到更多示例。
public static byte[] Encrypt(byte[] data, AsymmetricKeyParameter key)
{
RsaEngine e = new RsaEngine();
e.Init(true, key);
int blockSize = e.GetInputBlockSize();
List<byte> output = new List<byte>();
for (int chunkPosition = 0; chunkPosition < data.Length; chunkPosition += blockSize)
{
int chunkSize = Math.Min(blockSize, data.Length - (chunkPosition * blockSize));
output.AddRange(e.ProcessBlock(data, chunkPosition, chunkSize));
}
return output.ToArray();
}
