AES encrypt C# decrypt Java? -

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i'm trying decrypt c# encrypted data in java without success. i'm using 128 bit key&block size pkcs7 padding. here's c# code:

    public byte[] encrypt(byte[] data, byte[] key)     {         using (var ms = new memorystream())         {             using (var aes = rijndaelmanaged.create())             {                 aes.key = key;                 aes.iv = key;                 var stream = new cryptostream(ms, aes.createencryptor(aes.key, aes.iv), cryptostreammode.write);                 stream.write(data, 0, data.length);                 stream.flushfinalblock();                 return ms.toarray();             }         }     }

and java code:

private static key generatekey() throws exception {      key key = new secretkeyspec(files.readallbytes(paths.get("d:/temp/cr.key")), "aes");      return key; }  public static byte[] decrypt(byte[] encrypteddata) throws exception {     key key = generatekey();      cipher c = cipher.getinstance("aes/cbc/pkcs7padding", "bc");      ivparameterspec ivspec = new ivparameterspec(key.getencoded());     c.init(cipher.decrypt_mode, key, ivspec);      system.out.println(c.getblocksize());       c.update(encrypteddata);     byte[] decvalue = c.dofinal();     return decvalue; }  public static void main(string[] args) throws exception {     security.addprovider(new org.bouncycastle.jce.provider.bouncycastleprovider());      byte[] bb = decrypt(files.readallbytes(paths.get("d:\\temp\\cr~\\oebps\\chapter001.html")));            //decompressfile(bb, new file("d:\\temp\\enc.html")); }

any idea wrong?

thanks

update

sorry, how dumb of me, forgot write actual error message. here is:

exception in thread "main" javax.crypto.badpaddingexception: pad block corrupted @ org.bouncycastle.jcajce.provider.symmetric.util.baseblockcipher.enginedofinal(unknown source) @ javax.crypto.cipher.dofinal(cipher.java:1970)

thanks

you forgetting cipher.update(byte[]): byte[] return data whenever full block of ciphertext has been processed.

note: apparently not answer question, exception points error. bug in above code none-the-less.


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