为什么java.security.NoSuchProviderException没有这样的提供者：BC？ [英] Why java.security.NoSuchProviderException No such provider: BC?

问题描述

jar（bcprov-jdk16-145.jar）已添加到项目中， Security.addProvider（new org.bouncycastle.jce.provider.BouncyCastleProvider（））已添加到类中， BouncyCastleProvider.PROVIDER_NAME 会返回BC，但AesFileIo.writeFile（）仍然会引发 java.security.NoSuchProviderException否这样的提供者：BC 。任何想法？

  import java.io.FileOutputStream; 
 import java.io.InputStreamReader; 
 import java.io.ObjectOutputStream; 
 import javax.crypto.Cipher; 
 import javax.crypto.spec.IvParameterSpec; 
 import javax.crypto.spec.SecretKeySpec; 
 import org.bouncycastle.jce.provider.BouncyCastleProvider; 
 
 public class AesFileIo {
 
 private static final String AES_ALGORITHM =AES / CTR / NoPadding; 
 private static final String PROVIDER = BouncyCastleProvider.PROVIDER_NAME; 
 private static final byte [] AES_KEY_128 = {//现在硬编码
 78，-90，42，70，-5，20，-114，103，
 -99， 25，76，95，-85，94，57，54} 
 private static final byte [] IV = {//现在硬编码
 -85，-67，-5，88，28，49，49，85，
 114，83， -40，119，-65，91，76，108}; 
 private static final SecretKeySpec secretKeySpec = 
 new SecretKeySpec（AES_KEY_128，AES）; 
 private static final IvParameterSpec ivSpec = new IvParameterSpec（IV）; 
 
 public void AesFileIo（）{
 Security.addProvider（new org.bouncycastle.jce.provider 
 .BouncyCastleProvider（））; 
} 
 
 public void writeFile（String fileName，String theFile）{
 try {
 Cipher cipher = Cipher.getInstance（AES_ALGORITHM，PROVIDER）; 
 cipher.init（Cipher.ENCRYPT_MODE，secretKeySpec，ivSpec）; 
 byte [] encrypted = cipher.doFinal（theFile.getBytes（））; 
 ObjectOutputStream os = new ObjectOutputStream（
 new FileOutputStream（fileName））; 
 os.write（encrypted）; 
 os.flush（）; 
 os.close（）; 
} catch（Exception e）{
 StackTraceElement se = new Exception（）。getStackTrace（）[0]; 
 System.err.println（se.getFileName（）++ se.getLineNumber（）
 ++ e）; 
} 
} 
} 
  

解决方案>

我不是很熟悉 android sdk，但它认为 android-sdk BouncyCastle 提供商已添加到安全性。

您将在PC环境中做什么只是添加手动，

  Security.addProvider（new org.bouncycastle.jce.provider.BouncyCastleProvider（））;如果您可以访问策略文件，则
  

< ，只需添加一个条目：

  security.provider.5 = org.bouncycastle.jce.provider.BouncyCastleProvider 
  

请注意 .5 的已添加的提供商。

The jar (bcprov-jdk16-145.jar) has been added to the project, Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()) has been added to the class, and BouncyCastleProvider.PROVIDER_NAME does return "BC" but AesFileIo.writeFile() still throws java.security.NoSuchProviderException No such provider: BC. Any ideas?

import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class AesFileIo {

    private static final String AES_ALGORITHM = "AES/CTR/NoPadding";
    private static final String PROVIDER = BouncyCastleProvider.PROVIDER_NAME;
    private static final byte[] AES_KEY_128 = { // Hard coded for now
        78, -90, 42, 70, -5, 20, -114, 103,
        -99, -25, 76, 95, -85, 94, 57, 54};
    private static final byte[] IV = { // Hard coded for now
        -85, -67, -5, 88, 28, 49, 49, 85,
        114, 83, -40, 119, -65, 91, 76, 108};
    private static final SecretKeySpec secretKeySpec =
            new SecretKeySpec(AES_KEY_128, "AES");
    private static final IvParameterSpec ivSpec = new IvParameterSpec(IV);

    public void AesFileIo() {
        Security.addProvider(new org.bouncycastle.jce.provider
                .BouncyCastleProvider());
    }

    public void writeFile(String fileName, String theFile) {
        try {
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER);
            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
            byte[] encrypted = cipher.doFinal(theFile.getBytes());
            ObjectOutputStream os = new ObjectOutputStream(
                new FileOutputStream(fileName));
            os.write(encrypted);
            os.flush();
            os.close();
        } catch (Exception e) {
            StackTraceElement se = new Exception().getStackTrace()[0];
            System.err.println(se.getFileName() + " " + se.getLineNumber()
                    + " " + e);
        }
    }
}

解决方案

Im not very familiar with the android sdk, but it seeems that the android-sdk comes with the BouncyCastle provider already added to the security.

What you will have to do in the PC environment is just add it manually,

Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

if you have access to the policy file, just add an entry like:

security.provider.5=org.bouncycastle.jce.provider.BouncyCastleProvider 

Please notice the .5 it is equal to a sequential number of the already added providers.

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