X509證書公鑰加密

Question

我將一些Java代碼移植到C＃，但它看起來好像Java和C＃之間的公鑰填充不一致。

這裏是我的Java代碼：

package Encryption; 
import java.security.cert.X509Certificate; 
import java.security.interfaces.RSAPublicKey; 
import java.io.ByteArrayInputStream; 
import java.security.cert.CertificateException; 
import java.security.cert.CertificateFactory; 
import javax.xml.bind.DatatypeConverter; 
/** 
* 
* @author Cameron 
*/ 
public class Encryptiontest { 

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String[] args) { 
     // TODO code application logic here 

     String publicKey = "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"; 
     ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(DatatypeConverter.parseBase64Binary(publicKey)); 
     X509Certificate x509certificate; 
     try 
     { 
      x509certificate = (X509Certificate)CertificateFactory.getInstance("X.509").generateCertificate(bytearrayinputstream); 
      RSAPublicKey key = (RSAPublicKey)x509certificate.getPublicKey(); 
      System.out.println(DatatypeConverter.printBase64Binary(key.getEncoded())); 
     } 
     catch (CertificateException certificateexception) 
     { 
     } 
    } 

} 

當我打印RSAPublicKey的Base64表示，這就是我得到：

MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvUihVNnWYpu3uJmcLy + PBecKu4ziVD7OIeZ/V + tJkXbc5 + 6OW8G + QDtJKuJkkuxGNLBNmLHbCyXsJ/US3kKkU7/7yK7jfWRNdqAKJdDTVxsWnxlo +/+ 28ScGrAV6wK2bbK8GQBpsYRn1HKGCGceWIBCSqUfI7rwgwDnvqcW5PeivORd4 + or5DdhgUMwiV5Vr2fvdcAiQR1CKgMphxO4 OmZ4khpB/HT/xS4FscvfFsSBLM37jBMrnhY5yNKPeHZB2eYvehnnw22NFHJNksa + vVFXL9aJcZWJc/bqqlhlhL8eLdYSR/KA006PSInW8yWtd4IFVKJ1Moa41gCUZL8 1voQIDAQAB

但是，結果與具有相同base64公鑰的C＃不同。這是我的C＃代碼：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Security.Cryptography.X509Certificates; 
using System.Text; 
using System.Threading.Tasks; 

namespace EncryptionTest 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      String publicKey = "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"; 
      byte[] data = Convert.FromBase64String(publicKey); 

      X509Certificate x509certificate = new X509Certificate(data); 
      byte[] rsaPublicKey = x509certificate.GetPublicKey(); 

      string base64 = Convert.ToBase64String(rsaPublicKey); 

      Console.WriteLine(base64); 
      Console.ReadKey(); 
     } 
    } 
} 

C＃輸出：

MIIBCgKCAQEAvUihVNnWYpu3uJmcLy + PBecKu4ziVD7OIeZ/V + tJkXbc5 + 6OW8G + QDtJKuJkkuxGNLBNmLHbCyXsJ/US3kKkU7/7yK7jfWRNdqAKJdDTVxsWnxlo +/28ScGrAV6wK2bbK8GQBpsYRn1HKGCGceWIBCSqUfI7rwgwDnvqcW5PeivORd4 + or5DdhgUMwiV5Vr2fvdcAiQR1CKgMphxO4 + OmZ4khpB/HT/xS4FscvfFsSBLM37jBMrnhY5yNKPeHZB2eYvehnnw22NFHJNksa + vVFXL9aJcZWJc/bqqlhlhL8eLdYSR/KA006PSInW8yWtd4IFVKJ1Moa41gCUZL81voQIDAQAB

爲什麼是兩個相似的，但墊戴德不同？我如何使C＃輸出看起來像Java輸出？

Answer 1

Java輸出是ASN.1 SubjectPublicKeyInfo的DER編碼，如RFC 5280, section 4.1中所述。 C＃輸出是ASN.1 RSAPublicKey的DER編碼，因爲許多地方都包含RFC 2313, section 7.。

Here是一個易於使用的在線ASN.1解碼器，我覺得很方便。您可以將base64直接粘貼到表單中並將其解碼。

我不是一個真正的.NET專家，但打獵周圍我想你可能得到的東西更接近，如果不相同，通過作爲替代使用X509Certificate2類。你可以construct an X509Certificate2 object from an X509Certificate object。 X509Certificate2類包含您可以訪問的PublicKey屬性。該對象似乎有一個EncodedKeyValue，並且在這個看似無限的鏈條之後可以獲得原始數據。換句話說，就像：

X509Certificate2 x509certificate2 = new X509Certificate2(data); 
byte[] rsaPublicKey = x509certificate2.PublicKey.EncodedKeyValue.RawData; 

應該工作。但我沒有測試過它。