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Date: Mon, 13 Jul 2009 08:21:29 -0700 (PDT)
From: nitingautam <gautam.nitin@gmail.com>
To: users@tomcat.apache.org
Subject: Re: [OT] java.security.NoSuchAlgorithmException: No implementation
 for AES/CBC/NoPad
In-Reply-To: <4A5B4443.30208@christopherschultz.net>
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References: <24410804.post@talk.nabble.com>
 <4A5B4443.30208@christopherschultz.net>


I am using JAVA  1.4.2_17-b06
I face this issue sometimes only. Now days coming regularly :(
how to fix then


Christopher Schultz-2 wrote:
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> To whom it may concern,
> 
> (Marked as OT since this is a JVM issue, not a Tomcat issue).
> 
> On 7/9/2009 11:01 AM, nitingautam wrote:
>> In my web application i am using ldap authentication. I am using tomcat
>> 5.5
>> with jdk 1.4. From some days when I try to login it throw the following
>> error and rest of the time it works fine. What can be the issue...
> 
> [snip]
> 
>> Caused by: java.security.NoSuchAlgorithmException: No implementation for
>> AES/CBC/NoPadding found
>> 	at com.sun.net.ssl.internal.ssl.SunJSSE_i.d(Unknown Source)
>> 	at com.sun.net.ssl.internal.ssl.SunJSSE_i.a(Unknown Source)
> 
> Looks like your JVM doesn't have this cipher, which is weird if it only
> happens some times. What is your exact JVM version? You might want to
> upgrade, as things like this tend to get fixed. 1.4 is nearly dead.
> 
> Try running this code:
> 
>         String providerName = null;
>         Provider providers[];
>         if(null != args && 0 < args.length)
>         {
>             providers = new Provider[args.length];
>             for(int i = 0; i < args.length; i++)
>                 providers[i] = Security.getProvider(args[i]);
> 
>         } else
>         {
>             providers = Security.getProviders();
>         }
>         for(int i = 0; i < providers.length; i++)
>         {
>             Provider p = providers[i];
>             System.out.println("Provider: " + p);
>             System.out.println("===============================");
>             System.out.println("provider properties:");
>             ArrayList keys = new ArrayList(p.keySet());
>             Collections.sort(keys);
>             String key;
>             for(Iterator j = keys.iterator(); j.hasNext();
> System.out.println(key + "=" + p.get(key)))
>                 key = (String)j.next();
> 
>             System.out.println("-------------------------------");
>         }
> 
> This will tell you all the crypto providers, ciphers, etc. that are
> supported by your JVM. I ran this against my own JVM:
> 
> $ java -version
> java version "1.6.0_13"
> Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
> Java HotSpot(TM) Client VM (build 11.3-b02, mixed mode, sharing)
> $ java GetProviderInfo | grep AES
> Alg.Alias.AlgorithmParameters.Rijndael=AES
> Alg.Alias.Cipher.Rijndael=AES
> Alg.Alias.KeyGenerator.Rijndael=AES
> AlgorithmParameters.AES=com.sun.crypto.provider.AESParameters
> Cipher.AES=com.sun.crypto.provider.AESCipher
> Cipher.AES SupportedKeyFormats=RAW
> Cipher.AES
> SupportedModes=ECB|CBC|PCBC|CTR|CTS|CFB|OFB|CFB8|CFB16|CFB24|CFB32|CFB40|CFB48|CFB56|CFB64|OFB8|OFB16|OFB24|OFB32|OFB40|OFB48|OFB56|OFB64|CFB72|CFB80|CFB88|CFB96|CFB104|CFB112|CFB120|CFB128|OFB72|OFB80|OFB88|OFB96|OFB104|OFB112|OFB120|OFB128
> Cipher.AES SupportedPaddings=NOPADDING|PKCS5PADDING|ISO10126PADDING
> Cipher.AESWrap=com.sun.crypto.provider.AESWrapCipher
> Cipher.AESWrap SupportedKeyFormats=RAW
> Cipher.AESWrap SupportedModes=ECB
> Cipher.AESWrap SupportedPaddings=NOPADDING
> KeyGenerator.AES=com.sun.crypto.provider.AESKeyGenerator
> Provider.id info=SunJCE Provider (implements RSA, DES, Triple DES, AES,
> Blowfish, ARCFOUR, RC2, PBE, Diffie-Hellman, HMAC)
> 
> You can see in there that AES supports the CBC mode as well as the
> NOPADDING padding (though I didn't actually try to create an
> AES/CBC/NOPADDING cipher just to make sure).
> 
> I wonder if your JVM is broken?
> 
> - -chris
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