为什么 java.security.NoSuchProviderException 没有这样的提供程序: BC？

Jar (bcprov-jdk16-145.jar)已经被添加到项目中，Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider())已经被添加到类中，而且 BouncyCastleProvider.PROVIDER_NAME确实返回“ BC”，但是存储文件()仍然抛出 java.security.NoSuchProviderException No such provider: BC。有什么想法吗？

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);
}
}
}
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最佳答案

Im not very familiar with the Android sdk, but it seems 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

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

小开

you can add security provider by editing java.security by adding security.provider.=org.bouncycastle.jce.provider.BouncyCastleProvider

or add a line in your top of your class

Security.addProvider(new BouncyCastleProvider());

you can use below line to specify provider while specifying algorithms

Cipher cipher = Cipher.getInstance("AES", "SunJCE");

if you are using other provider like Bouncy Castle then

Cipher cipher =  Cipher.getInstance("AES", "BC");
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For those who are using web servers make sure that the bcprov-jdk16-145.jar has been installed in you servers lib, for weblogic had to put the jar in:

<weblogic_jdk_home>\jre\lib\ext
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You can add security provider by editing java.security with using following code with creating static block:

static {
Security.addProvider(new BouncyCastleProvider());
}

If you are using maven project, then you will have to add dependency for BouncyCastleProvider as follows in pom.xml file of your project.

<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.47</version>
</dependency>

If you are using normal java project, then you can add download bcprov-jdk15on-147.jar from the link given below and edit your classpath.

http://www.java2s.com/Code/Jar/b/Downloadbcprovextjdk15on147jar.htm

小开

My experience with this was that when I had this in every execution it was fine using the provider as a string like this

Security.addProvider(new BounctCastleProvider());
new JcaPEMKeyConverter().setProvider("BC");

But when I optimized and put the following in the constructor:

   if(bounctCastleProvider == null) {
bounctCastleProvider = new BouncyCastleProvider();
}


if(Security.getProvider(bouncyCastleProvider.getName()) == null) {
Security.addProvider(bouncyCastleProvider);
}

Then I had to use provider like this or I would get the above error:

new JcaPEMKeyConverter().setProvider(bouncyCastleProvider);

I am using bcpkix-jdk15on version 1.65


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