Allowing this didn't do any actual harm, since there aren't any
shared structures or leakable objects here. Still, it's bad style
and might cause trouble in the future.
Closes ticket 27856.
The trunnel functions are written under the assumption that their
allocators can fail, so GCC LTO thinks they might return NULL. In
point of fact, they're using tor_malloc() and friends, which can't
fail, but GCC won't necessarily figure that out.
Fixes part of #27772.
Instead, have it call a mockable function. We don't want
crypto_strongest_rand() to be mockable, since doing so creates a
type error when we call it from ed25519-donna, which we do not build
in a test mode.
Fixes bug 27728; bugfix on 0.3.5.1-alpha
This shouldn't be a user-visible change: nobody has a 16 MB RSA
key that they're trying to use with Tor.
I'm doing this to fix CID 1439330 / ticket 27730, where coverity
complains (on 64-bit) that we are making a comparison that is never
true.
This is harder than with OpenSSL, since OpenSSL counts the bytes on
its own and NSS doesn't. To fix this, we need to define a new
PRFileDesc layer that has its own byte-counting support.
Closes ticket 27289.
This function tells the underlying TLS object that it shouldn't
close the fd on exit. Mostly, we hope not to have to use it, since
the NSS implementation is kludgey, but it should allow us to fix
This is an attempt to work around what I think may be a bug in
OSS-Fuzz, which thinks that uninitialized data might be passed to
the curve25519 functions.
This reverts commit b5fddbd241.
The commit here was supposed to be a solution for #27451 (fd
management with NSS), but instead it caused an assertion failure.
Fixes bug 27500; but not in any released Tor.
On new glibc versions, there's an explicit_bzero(). With openssl,
there's openssl_memwipe().
When no other approach works, use memwipe() and a memory barrier.
