标签:encryption asp-net c
我需要使用我公司的数字证书签名并验证字符串. VerifyHash(hash,CryptoConfig.MapNameToOID(“ SHA1”),签名);部分返回false,因此出现“签名无效”错误.我究竟做错了什么?此错误最可能的原因是什么?
using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
namespace ConsoleApplication1
{
class Program
{
static byte[] Sign(string text, string certSubject)
{
X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
X509Certificate2 myCert = null;
RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
store.Open(OpenFlags.ReadOnly);
foreach (X509Certificate2 cert in store.Certificates.Find(X509FindType.FindBySubjectName, certSubject, false))
{
myCert = cert;
break;
}
store.Close();
if (myCert == null)
{
throw new Exception("Certificate not found: " + certSubject, null);
}
// Hash the data
SHA1Managed sha1 = new SHA1Managed();
UnicodeEncoding encoding = new UnicodeEncoding();
byte[] data = encoding.GetBytes(text);
byte[] hash = sha1.ComputeHash(data);
// Sign the hash
return provider.SignHash(hash, CryptoConfig.MapNameToOID("SHA1"));
}
static bool Verify(string text, byte[] signature, string certPath)
{
// Load the certificate we'll use to verify the signature from a file
X509Certificate2 cert = new X509Certificate2(certPath);
// Note:
// If we want to use the client cert in an ASP.NET app, we may use something like this instead:
// X509Certificate2 cert = new X509Certificate2(Request.ClientCertificate.Certificate);
// Get its associated CSP and public key
RSACryptoServiceProvider csp = (RSACryptoServiceProvider)cert.PublicKey.Key;
// Hash the data
SHA1Managed sha1 = new SHA1Managed();
UnicodeEncoding encoding = new UnicodeEncoding();
byte[] data = encoding.GetBytes(text);
byte[] hash = sha1.ComputeHash(data);
// Verify the signature with the hash
return csp.VerifyHash(hash, CryptoConfig.MapNameToOID("SHA1"), signature);
}
static void Main(string[] args)
{
// Usage sample
try
{
// Sign text
byte[] signature = Sign("Test 123", "Ross cert");
// Verify signature.
if (Verify("Test 123", signature, @"C:\...RossTest.cer"))
{
Console.WriteLine("SUCCESS! Signature verified");
}
else
{
Console.WriteLine("ERROR: Signature not valid!");
}
}
catch (Exception ex)
{
Console.WriteLine("EXCEPTION: " + ex.Message);
}
Console.ReadKey();
}
}
}
解决方法:
我可以想象问题是在您的sign方法中,您花了很多精力来获取myCert,但后来却从未使用过它.您只需使用新创建的未初始化的RSACryptoServiceProvider对其进行签名.
我想象在store.Close()行之后,您需要类似以下内容的东西:
RSACryptoServiceProvider provider = (RSACryptoServiceProvider)cert.PrivateKey;
标签:encryption,asp-net,c 来源: https://codeday.me/bug/20191202/2084924.html
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