Find if a certificate is self signed or CA signed

Question

I have a web app, which allows user to upload pkcs12. I store the pkcs12 as binary in database. Is there any way for me to know if the certificate in the pkcs12 is self signed

Answer 1

Have you tried the BouncyCastle lib?

http://www.bouncycastle.org/wiki/display/JA1/Frequently+Asked+Questions

" There are specific example programs for dealing with Attribute Certificates, PKCS12, SMIME and OpenPGP. They can be found in the packages:

org.bouncycastle.jce.examples org.bouncycastle.mail.smime.examples org.bouncycastle.openpgp.examples Another useful source of examples is the test packages:

org.bouncycastle.crypto.test org.bouncycastle.jce.provider.test org.bouncycastle.cms.test org.bouncycastle.mail.smime.test org.bouncycastle.openpgp.test org.bouncycastle.cert.test org.bouncycastle.pkcs.test org.bouncycastle.tsp.test "