没有提供Bouncycastle加密算法 [英] Bouncycastle encryption algorithms not provided

问题描述

我正在尝试使用BouncyCastle与Android来实现ECDH和EL Gamal。我添加了bouncycastle jar文件（bcprov-jdk16-144.jar），并编写了一些可用于我的电脑jvm的代码，但是当我尝试将其移植到我的Android应用程序时，它会抛出：

  java.security.NoSuchAlgorithmException：KeyPairGenerator ECDH实现未找到
  

代码示例是：

  Security.addProvider（new org.bouncycastle.jce.provider.BouncyCastleProvider （））; 
 
 java.security.KeyPairGenerator keyGen = org.bouncycastle.jce.provider.asymmetric.ec.KeyPairGenerator.getInstance（ECDH，BC）; 
 ECGenParameterSpec ecSpec = new ECGenParameterSpec（prime192v1）; 
 
 keyGen.initialize（ecSpec，SecureRandom.getInstance（SHA1PRNG））; 
 
 
 
 KeyPair对= keyGen.generateKeyPair（）; 
 PublicKey pubk = pair.getPublic（）; 
 PrivateKey prik = pair.getPrivate（）; 
  

然后，我写了一个简单的程序，看看什么加密算法可用，并在我的android模拟器和在我的电脑上，jvm的代码是：

  Set< Provider.Service> rar = new org.bouncycastle.jce.provider.BouncyCastleProvider（）。getServices（）; 
迭代器< Provider.Service> ir = rar.iterator（）; 
 while（ir.hasNext（））
 System.out.println（ir.next（）。getAlgorithm（））; 
  

在android上我没有得到任何EC算法，而在我的电脑上正常运行，这是很好的。 / p>

当编译很多弹性城堡类时，我还会收到以下两个错误：

01 -07 17：17：42.548：INFO / dalvikvm（1054）：DexOpt：不解析模糊类'Lorg / bouncycastle / asn1 / ASN1Encodable;'

01-07 17 ：17：42.548：DEBUG / dalvikvm（1054）：DexOpt：不验证'Lorg / bouncycastle / asn1 / ess / OtherSigningCertificate;'：多个定义

解决方案

你可能想要海绵城堡 - 由Bouncy Castle制作的重新包装专门针对Android。如下所述：

http://code.google.com/p/android/issues/detail?id=3280

... Android平台不幸融入Bouncy Castle的一个缩小版本，这也使得由于类加载器冲突而使安装更新版本的库变得困难 - 即使添加完整的BC jar也不会得到您添加的其他类。

海绵城堡是Android随附的Bouncy Castle加密库的残缺版本的完全替代品。有一些小的更改可以在Android上运行：

• 所有包名都已从org.bouncycastle。*移动到org .spongycastle。* - 所以没有类加载器冲突


• Java Security API提供者名称现在是 SC 而不是 BC

I'm trying to use BouncyCastle with android to implement ECDH and EL Gamal. I've added the bouncycastle jar file (bcprov-jdk16-144.jar) and written some code that works with my computers jvm however when I try and port it to my android application it throws:

java.security.NoSuchAlgorithmException: KeyPairGenerator ECDH implementation not found

A sample of the code is:

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

java.security.KeyPairGenerator keyGen = org.bouncycastle.jce.provider.asymmetric.ec.KeyPairGenerator.getInstance("ECDH", "BC");
                ECGenParameterSpec ecSpec = new ECGenParameterSpec("prime192v1");

                keyGen.initialize(ecSpec, SecureRandom.getInstance("SHA1PRNG"));



                KeyPair pair = keyGen.generateKeyPair();
                PublicKey pubk = pair.getPublic();
                PrivateKey prik = pair.getPrivate();

I then wrote a simple program to see what encryption algorithms are available and ran it on my android emulator and on my computers jvm the code was:

Set<Provider.Service> rar = new org.bouncycastle.jce.provider.BouncyCastleProvider().getServices();
    Iterator<Provider.Service> ir = rar.iterator();
    while(ir.hasNext())
        System.out.println(ir.next().getAlgorithm());

On android I do not get any of the EC algorithms while ran normally on my computer it's fine.

I'm also getting the following two errors when compiling for a lot of the bouncy castle classes:

01-07 17:17:42.548: INFO/dalvikvm(1054): DexOpt: not resolving ambiguous class 'Lorg/bouncycastle/asn1/ASN1Encodable;'

01-07 17:17:42.548: DEBUG/dalvikvm(1054): DexOpt: not verifying 'Lorg/bouncycastle/asn1/ess/OtherSigningCertificate;': multiple definitions

What am I doing wrong?

解决方案

You probably want Spongy Castle - a repackage I made of Bouncy Castle specifically targeted for Android. As noted here:

http://code.google.com/p/android/issues/detail?id=3280

...the Android platform unfortunately incorporates a cut-down version of Bouncy Castle, which also makes installing an updated version of the libraries difficult due to classloader conflicts - even when you add your full BC jar, you don't get the additional classes you added.

Spongy Castle is a full replacement for the crippled versions of the Bouncy Castle cryptographic libraries which ship with Android. There are a couple of small changes to make it work on Android:

• all package names have been moved from org.bouncycastle.* to org.spongycastle.* - so no classloader conflicts
• the Java Security API Provider name is now SC rather than BC

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