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Java Forum / Security / August 2005JCE - load key from string
Hi All, We're trying to use JCE to encrypt some data. The issue is key storage. We want to store it in some database, so the question is how to re-create the key for decryption from varchar2 column? The key in string form looks like this: cryptix.jce.provider.key.RawSecretKey@3bfce353 This can be stored in the database easily. But how to load this into KeyStore back? TIA Michael Hello, Most samples you'll find store the key in a file. It's as simple as new ObjectOutputStream(new FileOutputStream(file)).writeObject(key). Now, you want to save a string into a database. So you'd need to serialize the object into a ByteArrayOutputStream, convert the bytes with Base64 and save the resulting string. And the other way round to load it. Just out of my head, not verified... :-) Hi Ben, Yes, I know how to create key from file :-) The solution I found looks like this (example is for TripleDES encryption key): DESedeKeySpec desKeySpec = new DESedeKeySpec("[24-bit key string]".getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede"); SecretKey key = keyFactory.generateSecret(desKeySpec); This way the key is restored correctly. I think your solution works too, but I haven't tried it - I'm not sure it's any smaller or quicker?... Thanks a lot Michael Hi Ben, Yes, I know how to create key from file :-) The solution I found looks like this (example is for TripleDES encryption key): DESedeKeySpec desKeySpec = new DESedeKeySpec("[24-bit key string]".getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede"); SecretKey key = keyFactory.generateSecret(desKeySpec); This way the key is restored correctly. I think your solution works too, but I haven't tried it - I'm not sure it's any smaller or quicker?... Thanks a lot Michael > Hello, > [quoted text clipped - 8 lines] > > Just out of my head, not verified... :-) Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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