BERViewer

BERViewer is a program that allows the user to "view" BER/DER encoded files such as X.509 certificates and S/MIME messages. It comes in a Windows 9x/NT/2K version and a Mac OS X version. It is absolutely FREE! Below is a screen shot, showing two open files:

Windows Version

Mac OS X Version

For more information on ASN.1 see the following links:

• • A free program by Peter Gutman, under "Security Standards", halfway down the page. The program is called "dumpasn1.c". No, I didn't use it to write BERViewer, but I do use his dumpasn1.cfg for the OIDs. BTW, Peter does have a quote from me concerning PKIX on his page.

  • If you want to pay for an ASN.1 compiler, here's the one to get: OSS Nokalva

  • Good web site for Object Identifiers (OIDs)

  • Another viewer that allows editing Asn1Editor. For Windows only and requires .NET.