KeyGenerator AES implementation not found

[CremaGames Studios]

Hi,

I'm trying to use AES for encyption and it seems that Robo isn't loading this implementation:

java.security.NoSuchAlgorithmException: KeyGenerator AES implementation not found
at org.apache.harmony.security.fortress.Engine.notFound(Engine.java)
at org.apache.harmony.security.fortress.Engine.getInstance(Engine.java)
at javax.crypto.KeyGenerator.getInstance(KeyGenerator.java)

I've tried adding some packages to the robo.xml but I can't find where is the one that has AES:

  <forceLinkClasses>
  <pattern>org.apache.harmony.xnet.provider.jsse.*</pattern>
  <pattern>com.android.org.bouncycastle.jce.provider.BouncyCastleProvider</pattern>
  <pattern>com.android.org.bouncycastle.jce.provider.JCERSACipher</pattern>
  <pattern>org.apache.harmony.security.*</pattern>
  <pattern>org.apache.harmony.security.fortress.*</pattern>
  <pattern>org.apache.harmony.security.fortress.Engine*</pattern>
  </forceLinkClasses>

Here is the relevant code:

KeyGenerator kgen = KeyGenerator.getInstance("AES"); 

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); 

try{ 

  sr = SecureRandom.getInstance("SHA1PRNG", "Crypto"); 

}catch(NoSuchProviderException ex){ 

  sr = SecureRandom.getInstance("SHA1PRNG"); 

}

[Niklas Therning]

You should see a WARN in the console when Class.forName() fails to load a class.

Another way to determine what you need to add to forceLinkClasses is to temporarily use **.* as pattern, i.e. link in everything, and then print out the name of the class returned by KeyGenerator.getInstance()

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[CremaGames Studios]

I've tried that but with no luck. With the pattern **.* the encrypt works, and here is the name of the class generated by KeyGenerator:

kgen.getClass().getName(): javax.crypto.KeyGenerator
kgen.getProvider().getInfo(): BouncyCastle Security Provider v1.46
kgen.getProvider().getName(): BC
kgen.getProvider().getClass().getName(): com.android.org.bouncycastle.jce.provider.BouncyCastleProvider
sr.getProvider().getClass().getCanonicalName(): org.apache.harmony.security.provider.crypto.CryptoProvider

Code:

KeyGenerator kgen = KeyGenerator.getInstance("AES");

System.out.println(kgen.getClass().getName());
System.out.println(kgen.getProvider().getInfo());
System.out.println(kgen.getProvider().getName());
System.out.println(kgen.getProvider().getClass().getName());

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
try{
sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");

}catch (NoSuchProviderException ex){

sr = SecureRandom.getInstance("SHA1PRNG");
}

System.out.println(sr.getProvider().getClass().getCanonicalName());

So I put the patterns:

  <forceLinkClasses>
<pattern>javax.crypto.KeyGenerator</pattern>
<pattern>com.android.org.bouncycastle.jce.provider.BouncyCastleProvider</pattern>
    <pattern>org.apache.harmony.security.provider.crypto.CryptoProvider</pattern>
  </forceLinkClasses>

But still don't work and the same error as before.

[Niklas Therning]

Symmetric cryptos such as AES are in the com.android.org.bouncycastle.jce.provider.symmetric package. Please try:

<forceLinkClasses>

  <pattern>com.android.org.bouncycastle.jce.provider.BouncyCastleProvider</pattern>

  <pattern>com.android.org.bouncycastle.jce.provider.symmetric.AES*</pattern>

</forceLinkClasses>

Let me know if it works.

[CremaGames Studios]

Thanks Niklas, it works.