Programming Forums > Application Development > Java

smith.norton · Oct 15th, 2006, 8:52 AM

Can I create a certificate, that is, .cer and .pfx files using Java?

If so, can you please give me names of the classes from where I can start working?

smith.norton · Oct 15th, 2006, 10:42 AM

please help

Polyphemus_ · Oct 15th, 2006, 11:57 AM

Be patient, my boy. Find information about the file formats (structure, etcetera). Classes you will need are those to read and write files - probably in binary format, I don't know anything about .cer and .pfx files.

DaWei · Oct 15th, 2006, 12:24 PM

Starting place.

Arevos · Oct 15th, 2006, 5:00 PM

DaWei gives a good starting point. Try googling around for keytool and openssl - those are the programs most commonly used for this sort of thing. I'll warn you now, though, it's not an easy or intuitive process, and you can find yourself wondering why the hell your certificate isn't being validated.

Yes, I've had some bad experience with this

smith.norton · Oct 16th, 2006, 4:05 AM

Thank you everyone for replying. Actually, I know the concepts of CA, CA chains, certificates, PKCS #12, etc.

I have also tried to solve my problem with keytool before posting this. With keytool I could generate a self-signed CA certificate. But I couldn't create other certificates (web-site certificate as well as personal certificates for client authentication) signed with this CA certificate. So, I thought I would write my own Java program that would create these CA signed certificates.

I still couldn't figure how to do it using keytool or Java?

Arevos · Oct 16th, 2006, 5:27 AM

I'd be tempted to use OpenSSL. It's a little more reliable at certificate generation than keytool.

Eoin · Oct 16th, 2006, 5:37 AM

I second OpenSSL, on windows the prebuilt binaries by Shining Light Productions together with some web resources should be all you need.

Oct 15th, 2006, 12:24 PM	#4
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Starting place. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Oct 16th, 2006, 5:37 AM	#8
Eoin Hobbyist Programmer Join Date: Jun 2006 Location: Ireland Posts: 152 Rep Power: 3	I second OpenSSL, on windows the prebuilt binaries by Shining Light Productions together with some web resources should be all you need. __________________ Visit my website BinaryNotions.

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Oct 15th, 2006, 8:52 AM	#1
smith.norton Newbie Join Date: Jun 2006 Posts: 8 Rep Power: 0	Create certificates using Java Can I create a certificate, that is, .cer and .pfx files using Java? If so, can you please give me names of the classes from where I can start working?

Oct 15th, 2006, 10:42 AM	#2
smith.norton Newbie Join Date: Jun 2006 Posts: 8 Rep Power: 0	please help

Oct 15th, 2006, 11:57 AM	#3
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	Be patient, my boy. Find information about the file formats (structure, etcetera). Classes you will need are those to read and write files - probably in binary format, I don't know anything about .cer and .pfx files.

Oct 15th, 2006, 5:00 PM	#5
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	DaWei gives a good starting point. Try googling around for keytool and openssl - those are the programs most commonly used for this sort of thing. I'll warn you now, though, it's not an easy or intuitive process, and you can find yourself wondering why the hell your certificate isn't being validated. Yes, I've had some bad experience with this

Oct 16th, 2006, 4:05 AM	#6
smith.norton Newbie Join Date: Jun 2006 Posts: 8 Rep Power: 0	Thank you everyone for replying. Actually, I know the concepts of CA, CA chains, certificates, PKCS #12, etc. I have also tried to solve my problem with keytool before posting this. With keytool I could generate a self-signed CA certificate. But I couldn't create other certificates (web-site certificate as well as personal certificates for client authentication) signed with this CA certificate. So, I thought I would write my own Java program that would create these CA signed certificates. I still couldn't figure how to do it using keytool or Java?

Oct 16th, 2006, 5:27 AM	#7
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	I'd be tempted to use OpenSSL. It's a little more reliable at certificate generation than keytool.

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Programming Forums > Application Development > Java

Create certificates using Java