I think you need to implement that yourself. It doesn't seem "that hard". You can use the SSL_verify_callback callback of IO::Socket::SSL to do the store and verification. You can get at the certificate with Net::SSLeay::PEM_get_string_X509() (according to the documentation) and then compare or store.

In reply to Re: Designating Trust on First Use with IO::Socket::SSL SSL_verify_mode by Corion
in thread Designating Trust on First Use with IO::Socket::SSL SSL_verify_mode by mldvx4

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