This function was a wrapper around RSA_check_key() in openssl, which
checks for invalid RSA private keys (like those where p or q are
composite, or where d is not the inverse of e, or where n != p*q).
We don't need a function like this in NSS, since unlike OpenSSL, NSS
won't let you import a bogus private key.
I've renamed the function and changed its return type to make it
more reasonable, and added a unit test for trying to read a key
where n != p*q.
We used to link both libraries at once, but now that I'm working on
TLS, there's nothing left to keep OpenSSL around for when NSS is
enabled.
Note that this patch causes a couple of places that still assumed
OpenSSL to be disabled when NSS is enabled
- tor-gencert
- pbkdf2
This cleans up a lot of junk from crypto_rsa_openssl, and will
save us duplicated code in crypto_rsa_nss (when it exists).
(Actually, it already exists, but I am going to use git rebase so
that this commit precedes the creation of crypto_rsa_nss.)
This is comparatively straightforward too, except for a couple of
twists:
* For as long as we're building with two crypto libraries, we
want to seed _both_ their RNGs, and use _both_ their RNGs to
improve the output of crypto_strongest_rand()
* The NSS prng will sometimes refuse to generate huge outputs.
When it does, we stretch the output with SHAKE. We only need
this for the tests.
This is meant for use when encrypting the current time within the
period in order to get a monotonically increasing revision counter
without actually revealing our view of the time.
This scheme is far from the most state-of-the-art: don't use it for
anything else without careful analysis by somebody much smarter than
I am.
See ticket #25552 for some rationale for this logic.
We need this in our unit tests, since otherwise NSS will notice
we've forked and start cussing us out.
I suspect we'll need a different hack for daemonizing, but this
should be enough for tinytest to work.
These are now part of crypto_init.c. The openssl-only parts now
live in crypto_openssl_mgt.c.
I recommend reviewing this patch with -b and --color-moved.
We have to check for ERR_load_KDF_strings() here, since that's the
only one that's actually a function rather than a macro.
Fixes compilation with LibreSSL. Fixes bug 26712; bug not in
any released Tor.
Fun fact: these files used to be called log.[ch] until we ran into
conflicts with systems having a log.h file. But now that we always
include "lib/log/log.h", we should be fine.
Nick Mathewson
George Kadianakis