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Less known Solaris Features: Signed binaries
One of problems in computer security is the validation of binaries: Is this the original binary or is it a counterfeit binary? Since Solaris 10 Sun electronically signs the binaries of the Solaris Operating Environment. You can check the signature of the binaries with the
Obviously you have to trust the
elfsign. But you can check it, when you boot the system from a trusted media (like a original media kit or a checksum validated iso-image. This enables you to check the signature of the
elfsign independently from the system.
By the way: This certificate and the signature is very important for crypto modules. The crypto framework of solaris just loads modules signed by Sun to prevent the usage of malicious modules (for example to read out the key store and send it somewhere) into the framework.