with arbitrary arguments instead of just a string.
- Change the key loaders to take a UI_METHOD instead of a callback
function pointer. NOTE: this breaks binary compatibility with
earlier versions of OpenSSL [engine].
- Addapt the nCipher code for these new conditions and add a card
insertion callback.
prompting, application-defined prompts, the possibility to use
defaults (for example default passwords from somewhere else) and
interrupts/cancelations.
In the new crypto/ui/, this was changed into tty (which is usually
/dev/tty), i.e. the FILE * used for reading passwords from the user.
However stdio buffering for read/write streams is not without pitfalls
(passwords would be echoed on some systems).
To avoid problems, split tty into tty_in and tty_out (which are
opened separately).
(for new functions...). One might still want to be able to pass down
a user-data pointer to be used by the UI. However, ex_data doesn't
quite cut it, since that means the appropriate index to it might need
to be shared between parts that aren't really related in that sense,
and would require the currently hidden (static) index holders to be
uncovered. Not a good thing. Therefore, add the possibility to add a
user-data pointer to a UI.
string (some engines may have certificates protected by a PIN!) and
a description to put into error messages.
Also, have our own password callback that we can send both a password
and some prompt info to. The default password callback in EVP assumes
that the passed parameter is a password, which isn't always the right
thing, and the ENGINE code (at least the nCipher one) makes other
assumptions...
Also, in spite of having the functions to load keys, some utilities
did the loading all by themselves... That's changed too.
details (performance numbers and accompanying discussions:-). Note that
the code is not engaged in ./Configure yet. I'll add it later this week
along with updates for .spec file.
Submitted by:
Reviewed by:
PR:
passwords that were given to the key loading functions were completely
ignored, at least in the ncipher code, and then we made the assumption
that the callback wanted a prompt as user argument.
All that is now changed, and the application author is forced to give
a callback function of type pem_callback_cb and possibly an argument
for it, just as for all other functions that want to generate password
prompting.
NOTE: this change creates binary and source incompatibilities with
previous versions of OpenSSL [engine]. It's worth it this time, to
get it right (or at least better and with a chance that it'll work).
