Store PrivateKey PublicKey in DB

[Lasse Bergstr�m]

Hi,

I am trying to store PrivateKey and PublicKey objects in a MySQL database. From an example in another post here at the forum:
http://www.coderanch.com/t/134195/Security/store-PublicKey-PrivateKey-database

The code example from that posts are:

Use the getEncoded() method to get the byte[] from the keys. To go the other way, getting an RSAPublicKey or RSAPrivateKey from a byte[], use the appropriate KeyFactory methods and encoded key specs, e.g. for RSAPrivateKey

    // byte [] encodedKey contains the RSA private key retrieved from the DB
    KeyFactory rsaKeyFac = KeyFactory.getInstance("RSA");
    PKCS8EncodedKeySpec encodedKeySpec = new PKCS8EncodedKeySpec(encodedKey);
    RSAPrivateKey privKey = (RSAPrivateKey)rsaKeyFac.generatePrivate(encodedKeySpec);

and for RSAPublicKey

    KeyFactory rsaKeyFac = KeyFactory.getInstance("RSA");
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encKey);
    RSAPublicKey pubKey = (RSAPublicKey )rsaKeyFac .generatePublic(keySpec);

I succeed in storing and retreiving the private key as in the first example. But when I try the public key conversion from byte array to a PublicKey object I get the following exception:

Exception in thread "main" java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException: algid parse error, not a sequence
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(RSAKeyFactory.java:163)
at java.security.KeyFactory.generatePublic(KeyFactory.java:304)

Somebody have a clue why the PublicKey example does not work?

Best regards

Lasse

[greg stark]

I cannot be sure without looking at the file in question. I would have to guess that the encoded public key is not in the correct format or has simply been retrieved incorrectly.