and bn_add_words to avoid using fake bignums to window other bignums that
can lead to corruption. This change allows all bignum tests to pass with
BN_DEBUG and BN_DEBUG_RAND debugging and valgrind. NB: This should be
tested on a few different architectures and configuration targets, as the
bignum code this deals with is quite preprocessor (and assembly) sensitive.

Submitted by: Nils Narsch
Reviewed by: Geoff Thorpe, Ulf Moeller

sure the current length is used to calculate the new buffer length instead
of using the old length (prior to any variable substitution).

Submitted by: Nils Larsch

Max req -x509 use V1 if extensions section absent.

be modified to choose it instead of hpux64-parisc-gcc, which should
then be removed. hpux64-parisc-cc is removed already now as redundant
[in case you wonder, 64-bit HP-UX ABI *implies* PA-RISC2.0].

PR: 772

Submitted by: Kirill Kochetkov <kochet@ixbt.com>

PR: #748

which is used by BN_DEBUG_RAND
Submitted by: Nils Larsch

Submitted by: Goetz Babin-Ebell <babin-ebell@trustcenter.de>

PR: #766

Submitted by: Tim Rice <tim@multitalents.net>

PR: #735, #765

so don't run them if BN_DEBUG_RAND is defined.

Also, fix another small bug.

Submitted by: Nils Larsch

Keep it as is to avoid an API change, but check for negativ values.

Submitted by: Nils Larsch

generally a more efficient comparison than comparing two integers, and the
first of these two loops was off-by-one (copying one too many values). This
change also removes a superfluous assignment that would set an unused word
to zero (and potentially allow an overrun in some cases).

Submitted by: Nils Larsch
Reviewed by: Geoff Thorpe

(where it was impossible to create an EC certificate with a compressed
public key), and has some style improvements based on some comments from
Steve Henson about use of the ASN1 macros.

Submitted by: Nils Larsch
Reviewed by: Geoff Thorpe

Submitted by: Nils Larsch
Reviewed by: Geoff Thorpe

bn_correct_top(), previously only bn_check_top() did this.

before.

constant BIGNUMs. It turns out that this trips up different but equally
useful compiler warnings to -Wcast-qual, and so wasn't worth the ugliness
it created. (Thanks to Ulf for the forehead-slap.)

is itself experimental, and in addition may cause execution to break on
existing openssl "bugs" that previously were harmless or at least
invisible.

Submitted by: Nils Larsch

and structures as constant without having to cast away const at any point.
There is still plenty of other code that makes gcc's "-Wcast-qual" unhappy,
but crypto/bn/ is now ok. Purists are welcome to suggest alternatives.

rather than OPENSSLDIR.

constructing BIGNUM structures with pointers offset into other bignums
(among other things). This corrects some of it that is too plainly insane,
and tries to ensure that bignums are normalised when passed to other
functions.

left in an inconsistent state when they are released for later reuse. This
change resets the BIGNUMs when they are released back to the context.

input to a function.

Obtained from: Stephen Henson <steve@openssl.org>

callback structure just before it is needed.

requires -DPEDANTIC and was hidden at the bottom of the file. This moves it
to the top and removes the redundant declaration.

Obtained from: Andy Polyakov <appro@openssl.org>

structures being passed in to or out of API functions, and this corrects a
couple of cases found so far.

Also, lop off a couple of bytes of white-space.