gopi gakkam

I want to same type of code please help me,
how did you generate AES 128 encryption key dynamically which supports java and C/C++?

thanks,
Gopal

i am calling createTarGzArchive and paasing list contails 4 XML files path. I have written below method for creating TarGZ byte array.
public static byte[] createTarGzArchive(List compressedFileList) throws ContextException { ByteArrayOutputStream byteArrayOutputStream = null; File compressedFileEntry = null; FileOutputStream stream = null; TarGzOutputStream out = null; TarEntry tarEntry = null; FileInputStream fileInputStream = null; try{ String fileName = null; byteArrayOutputStream = new ByteArrayOutputStream(); out = new TarGzOutputStream(byteArrayOutputStream); tarEntry = null; int compressedFileListSize = 0; int nRead = 0; byte buffer[] = new byte[1024]; for(int fileCount = 0 ; fileCount < compressedFileList.size(); fileCount++){ fileName = (String)compressedFileList.get(fileCount); compressedFileEntry = new File(fileName); tarEntry = new TarEntry(compressedFileEntry); tarEntry.setModTime(compressedFileEntry.lastModified()); tarEntry.setName(compressedFileEntry.getName()); out.putNextEntry(tarEntry); fileInputStream = new FileInputStream(compressedFileEntry); while(true){ nRead = fileInputStream.read(buffer, 0, buffer.length); if (nRead <= 0) break; out.write(buffer, 0, nRead); } fileInputStream.close(); out.closeEntry(); } out.close(); }catch(Exception e){ ApplicationRegistry.getInstance().getLog().writeException(e,"Problem encounterd during compression of TarGZipping file.", IfcExceptionId.TAR_CREATION_FAILED); throw new ApplicationException(IfcExceptionId.TAR_CREATION_FAILED); }finally{ compressedFileEntry = null; out = null; tarEntry = null; fileInputStream = null; } return byteArrayOutputStream.toByteArray(); }

this method retunr successfully byte array.
After that i am doing Encryption here i am passing that byte array to encryptBundle(byte[] tarGzBytes) method.

public static byte[] encryptBundle(byte[] tarGzBytes)throws Exception { SecretKeySpec skeySpec = null; byte[] encrypted ; /*// Get the KeyGenerator KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128); // 192 and 256 bits may not be available // Generate the secret key specs. SecretKey skey = kgen.generateKey(); byte[] raw = skey.getEncoded(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");*/ String filename = ThreadLocalApplicationRegistry.getRealPath() + "/" + IfcApplicationLiterals.ZIP_BUNDLE_FOLDER_NAME + "/SupportToolsEncryptionKey.properties"; //String filename = "config/SupportToolsEncryptionKey.properties"; skeySpec = createKey(filename); // Instantiate the cipher Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); encrypted = cipher.doFinal(tarGzBytes); return encrypted ; }

after that i am getting Encrypted TarGz byte array put into session.

is above code right or any thing needs to be done here?

Now i want to download that tarGz from jsp. How should i download tarGz file from jsp help me any one on this?
Please provide sample code for this.


Thanks,
Gopal



[BSouther: Added UBB CODE tags]
[ July 31, 2007: Message edited by: Ben Souther ]

I want to sample code for creation of tarGZ file using AES 128 bit Encryption/Decryption and using "com.ibm.crypto.provider" this package.

Can any one explin Key classes are below:
AESCipher
AESKeyFactory
AESKeyGenerator
AESKeySpec

Thanks,
Gopal Jakkam

Hi,

i want to sample code for Encryption/Decryption of TarGz file use AES 128 bit and using "com.ibm.crypto.provider" package.

Thanks,
Gopal