Encrypting / decrypting without importing keys?

[Atom 'Smasher']

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> I'm new to GnuPG and was wondering if it was possible to encrypt and/or 
> decrypt without needing to first import the keys into gpg.  I'm looking 
> to use gpg to encrypt data from a web page, where the user specifies the 
> public key to encrypt data, and then eventually a private key to decrypt 
> it.
>
> Additionally, is there anyway I can specify the keys to use as coming 
> from standard in or standard out instead of being file based?
====================

you can save a key into a file and use something like:

   gpg --no-default-keyring --keyring key-file --trust-model always -ear user

this hack allows an encryption key to be used without importing it. how to 
convert an ascii key into a binary key is an exercise i leave to the 
reader; it isn't that hard to do but an ascii key won't work.

also, see if <http://business-php.com/opensource/gpg_encrypt/> does most 
of what you need. it sounds like you'd have to tweak this, but the major 
work is done.


         ...atom

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