util/shlib_wrap.sh is now auto-generated so tell git to ignore it

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 6462876f8d9f6538ad0fcd70717077d9ae174e56)

Abort on unrecognised warning alerts

A peer continually sending unrecognised warning alerts could mean that we
make no progress on a connection. We should abort rather than continuing if
we receive an unrecognised warning alert.

Thanks to Shi Lei for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 77a6be4dfc2ecf406c2559a99bea51317ce0f533)

Add enginesdir to libcrypto.pc pkg-config file

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit cdbbf9900253e8006868eba948248b1092a057de)

Fix EC_KEY_print so it prints out private key information
even when the public key is not present in an EC_KEY

Reviewed-by: Stephen Henson <steve@openssl.org>
(cherry picked from commit 82f52631b21b021787f344733e08bb53f1e7f0ec)

If errno is ENXIO in BSS_new_file(), set BIO_R_NO_SUCH_FILE

VMS sets that errno when the device part of a file spec is malformed
or a logical name that doesn't exist.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit e82e2186e93e9a678dd8c0c5ba084d21d27d4d62)

Travis: Do asan and msan with shared libraries

Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit 047a5da2494abf565f5fb76f5cd92a05cd7fadd4)

Fix mem leaks during auto-deinit

Certain functions are automatically called during auto-deinit in order
to deallocate resources. However, if we have never entered a function which
marks lib crypto as inited then they never get called. This can happen if
the user only ever makes use of a small sub-set of functions that don't hit
the auto-init code.

This commit ensures all such resources deallocated by these functions also
init libcrypto when they are initially allocated.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Ben Laurie <ben@openssl.org>
(cherry picked from commit 135648bcd0e9db029582d3d7627a90a1b566c5d6)

Ensure trace recognises X25519

Using the -trace option to s_server or s_client was incorrectly printing
UNKNOWN for the X25519 curve.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 2d11f5b2ca863d4bd9e20b224932b247ed85842b)

engines/afalg: make it compile with backward compatibility headers.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 4e3997293b3825ed19de20d5484f8c0f66fce534)

Configurations/10-main.cf: AIX "facelift".

Improve interchangeability of aix*-gcc targets by linking shared
libraries with -static-libgcc, and address linking problems with
vendor compiler.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit f780eaad5be140cf192191b8d79dc3671443e0b2)

chacha/asm/chacha-ppc.pl: add missing .text directive.

RT#4667

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit abcbf7ed7ea249609d225e43e1bce3af1fa1028c)

Add missing debug strings.

Found by turning -Wswitch-enum on.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 252cfef151e302dce598503de09fd3a3341810d7)

Allow asan, msan and ubsan to be configured with shared libraries

The background story is that util/shlib_wrap.sh was setting LD_PRELOAD
or similar platform dependent variables, just in case the shared
libraries were built with -rpath.  Unfortunately, this doesn't work
too well with asan, msan or ubsan.

So, the solution is to forbid the combination of shared libraries,
-rpath and any of the sanity analyzers we can configure.

This changes util/shlib_wrap.sh so it only contains the code that sets
LD_PRELOAD when -rpath has been used when configuring.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 342a1a23793cb99921abeabe882adf8652ba715d)

Avoid EVP_PKEY_cmp() crash on EC keys without public component

Some hardware devices don't provide the public EC_POINT data. The only
way for X509_check_private_key() to validate that the key matches a
given certificate is to actually perform a sign operation and then
verify it using the public key in the certificate.

Maybe that can come later, as discussed in issue 1532. But for now let's
at least make it fail gracefully and not crash.

GH: 1532

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1547)

Configure: Reorganise the checking of disabled options

The way we figured out what options are crypto algorithms and what are
something other was somewhat sketchy.  This change bases the
distinction on available sdirs instead.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 3e2dd30d665f3a312a45f945ffafb74ff6c420d6)

GH1537: Avoid double-free in the EVP_PKEY API

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit d65c3615f6c658478503f4862f8055203a98038c)

Misc BN fixes

Never output -0; make "negative zero" an impossibility.
Do better checking on BN_rand top/bottom requirements and #bits.
Update doc.
Ignoring trailing garbage in BN_asc2bn.

Port this commit from boringSSL: https://boringssl.googlesource.com/boringssl/+/899b9b19a4cd3fe526aaf5047ab9234cdca19f7d%5E!/
        Ensure |BN_div| never gives negative zero in the no_branch code.

        Have |bn_correct_top| fix |bn->neg| if the input is zero so that we
        don't have negative zeros lying around.

        Thanks to Brian Smith for noticing.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 01c09f9fde5793e0b3712d602b02e2aed4908e8d)

Correct detection of group end in map file when testing symbol presence

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 77a42b5f177e308233ab108806c48b9590a780e2)

Unix build: have the makedepend and cc actions in one recipe

In the case of using an independent makedepend, we had split that into
two separate recipes, one depending on the other.  However, there are
cases where the makedepend recipe was always trying, but doesn't
update the time stamp of the .d file because there are no actual
changes, and thereby causing constant updates of the object files.

This change makes one recipe that takes care of both makedepend och
cc, thereby avoiding these extra updates.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 7e5b8b93f2ffa8300b992d2e79c50f0e5266c61b)

modes/asm/ghash-armv4.pl: improve interoperability with Android NDK.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 6cf412c473d8145562b76219ce3da73b201b3255)

Configurations/10-main.conf: fix omittions in commentary.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit d5a39c12f0331dd0d14dbfcf2b98921be4cbb1da)

Configurations/10-main.conf: remove solaris-x86-cc target.

Since vendor assembler can't assemble our modules with -KPIC flag,
it, assembly support, was not available as an option. But this
means lack of side-channel resistant code, which is incompatible
with security by todays standards.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 216a0cc4d6a35a21e613f1e7e9eee957768bf9dd)

Move 05-test_fuzz.t to 90-test_fuzz.t

This adheres much better to the documentation in test/README

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 377ab6d183453dac5454abf62d5341a559caa264)

Revert "INSTALL: add information on option no-fuzz-test"

This reverts commit 7f9ae88817ddf0aac5c6bd95d9a5af1c54ed5bbf.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit 967e831e88bc45ea32e5b3c762945859996771ff)

Revert "Make it possible to disable fuzz testing"

This reverts commit eb40eaed727500bf4a15f848c99e37edd18e142e.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit a5e1f1230e09b249ff94cc48aeffd1b874cb937e)

INSTALL: add information on option no-fuzz-test

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 7f9ae88817ddf0aac5c6bd95d9a5af1c54ed5bbf)

INSTALL: add information on the environment variable BUILDFILE

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit ed43fe73ea30eae1506f0f6618a09d6a5819fc28)

INSTALL: clarify OPENSSL_LOCAL_CONFIG_DIR

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit bf98d9dab5a03b59ca45333b74ba51f58f57243b)

Have Configure's HASH or TABLE produce complete lists

Because some targets execute perl code that might die, we risk
incomplete lists.  Make it so dying doesn't happen when we're listing
targets.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit d63c12c697faa4e2fa0e5d7565521a5813c86415)

Configure's print_table_entry printed incorrect information

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 0c0d78b88d0bc4171b577ba3877c7b7ed0e91935)

Make it possible to disable fuzz testing

These tests take a very long time on some platforms, and arent't
always strictly necessary.  This makes it possible to turn them
off.  The necessary binaries are still built, though, in case
someone still wants to do a manual run.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit eb40eaed727500bf4a15f848c99e37edd18e142e)

crypto/bn/*: x86[_64] division instruction doesn't handle constants, change constraint from 'g' to 'r'.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 68b4a6e91f5acd42489bb9d1c580acc5ae457cad)

The Perl interpreter might be in a path with spaces, so maybe quote it

Note: some shells do not like the command verb to be quoted, so we avoid
it unless it's actually necessary.

RT#4665

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit f879d5ff38d3c2283db968ea57c7a3207cc05889)

Code cleanup UI

Remove NULL check on parameter, and use NULL not ! on buffer.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit bde588df8a4d9f714cefe9cfd1a3931558de4c3c)

Add some CertStatus tests

The previous commit revealed a long standing problem where CertStatus
processing was broken in DTLS. This would have been revealed by better
testing - so add some!

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 767ccc3b77cde82c46ab4af541663f6c80e538d3)

Ensure the CertStatus message adds a DTLS message header where needed

The function tls_construct_cert_status() is called by both TLS and DTLS
code. However it only ever constructed a TLS message header for the message
which obviously failed in DTLS.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit f046afb0663fc4514f7fc5d1724439caa6858932)

Configure: save away the value of OPENSSL_LOCAL_CONFIG_DIR for reconf

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit ee4cdb7fdbdc46f931cb6e2eca109cc92832eb33)

Configure: Redo the logic for finding build file templates

Build file templates would be looked up like this if the user gave us
an additional directory to look for configuration files and build file
templates:

    $OPENSSL_LOCAL_CONFIG_DIR/$OSTYPE-Makefile.tmpl
    $SOURCEDIR/Configurations/$OSTYPE-Makefile.tmpl
    $OPENSSL_LOCAL_CONFIG_DIR/Makefile.tmpl
    $SOURCEDIR/Configurations/Makefile.tmpl

So for example, if the user created his own Makefile.tmpl and tried to
use it with a unixly config, it would never be user because we have a
unix-Makefile.tmpl in our Configurations directory.  This is clearly
wrong, and this change makes it look in this order instead:

    $OPENSSL_LOCAL_CONFIG_DIR/$OSTYPE-Makefile.tmpl
    $OPENSSL_LOCAL_CONFIG_DIR/Makefile.tmpl
    $SOURCEDIR/Configurations/$OSTYPE-Makefile.tmpl
    $SOURCEDIR/Configurations/Makefile.tmpl

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 79822c3cd55b9241187123fd016cb3c9a3beffbb)

Configure: clean away temporary section of code

We've done away with Makefile as source of information and now use
configdata.pm exclusively.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit acc63c7d6d4ea28497a6192a3445b40f2af88133)

Make it possible for the user to specify a different default build file

Make sure the information is kept for reconfiguration too.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 8b5156d18855f536cf5ceac10f5781e19fa8f1ea)

Remove comment tags from structs (coding style)

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit d196305aa0de1fc38837c27cb1ea6e60af9dd98d)

Use uppercase name for PCT_ enum

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 66117ab0f6c21a7c123becd58bd38a736e551c43)

VMS: honor --openssldir setting

Because of a perl operator priority mixup, the --openssldir argument
wasn't honored.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 661a396373fbd2082eee4ad6829336219ec7dac6)

Remove trailing zeros

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit e5f969a82fa81fad8d1721fc0bc915ad3eea927c)

Improve the definition of STITCHED_CALL in e_rc4_hmac_md5.c

The definition of STITCHED_CALL relies on OPENSSL_NO_ASM.  However,
when a configuration simply lacks the assembler implementation for RC4
(which is where we have implemented the stitched call), OPENSSL_NO_ASM
isn't implemented.  Better, then, to rely on specific macros that
indicated that RC4 (and MD5) are implemented in assembler.

For this to work properly, we must also make sure Configure adds the
definition of RC4_ASM among the C flags.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 216e8d91033d237880cff7da0d02d46d47bae41b)

Remove note from CHANGES about EC DRBG

EC DRBG support was added in 7fdcb457 in 2011 and then later removed.
However the CHANGES entry for its original addition was left behind.
This just removes the spurious CHANGES entry.

Reviewed-by: Stephen Henson <steve@openssl.org>
(cherry picked from commit bbf73f84fc42628cb619f9e8e02691530cfeb08e)

Prepare for 1.1.0a-dev

Reviewed-by: Richard Levitte <levitte@openssl.org>

Prepare for 1.1.0 release

Reviewed-by: Richard Levitte <levitte@openssl.org>

Fix uninit read in sslapitest

msan detected an uninit read.

Reviewed-by: Richard Levitte <levitte@openssl.org>

CHANGES: mention Windows UTF-8 opt-in option.

Reviewed-by: Richard Levitte <levitte@openssl.org>

Windows: UTF-8 opt-in for command-line arguments and console input.

User can make Windows openssl.exe to treat command-line arguments
and console input as UTF-8 By setting OPENSSL_WIN32_UTF8 environment
variable (to any value). This is likely to be required for data
interchangeability with other OSes and PKCS#12 containers generated
with Windows CryptoAPI.

Reviewed-by: Richard Levitte <levitte@openssl.org>

Support broken PKCS#12 key generation.

OpenSSL versions before 1.1.0 didn't convert non-ASCII
UTF8 PKCS#12 passwords to Unicode correctly.

To correctly decrypt older files, if MAC verification fails
with the supplied password attempt to use the broken format
which is compatible with earlier versions of OpenSSL.

Reviewed-by: Richard Levitte <levitte@openssl.org>

Don't switch password formats using global state.

To avoid possible race conditions don't switch password format using
global state in crypto/pkcs12

Reviewed-by: Richard Levitte <levitte@openssl.org>

Fix an uninitialised read on an error path

Found by Coverity.

Reviewed-by: Richard Levitte <levitte@openssl.org>

NEWS: add a number of the types that were made opaque

Reviewed-by: Matt Caswell <matt@openssl.org>

Un-delete still documented X509_STORE_CTX_set_verify

It should not have been removed.

Reviewed-by: Rich Salz <rsalz@openssl.org>

Configurations/10-main.conf: fix solaris64-*-cc link problems.

Reviewed-by: Richard Levitte <levitte@openssl.org>

ec/asm/ecp_nistz256-x86_64.pl: /cmovb/cmovc/ as nasm doesn't recognize cmovb.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Clarify the error messages in 08f6ae5b28

Ensure it is clear to the user why there has been an error.

Reviewed-by: Rich Salz <rsalz@openssl.org>

Fix no-ec2m

The new curves test did not take into account no-ec2m

Reviewed-by: Richard Levitte <levitte@openssl.org>

CRYPTO_atomic_add(): check that the object is lock free

If not, fall back to our own code, using the given mutex

Reviewed-by: Andy Polyakov <appro@openssl.org>

CRYPTO_atomic_add(): use acquire release memory order rather than relaxed

For increments, the relaxed model is fine.  For decrements, it's
recommended to use the acquire release model.  We therefore go for the
latter.

Reviewed-by: Andy Polyakov <appro@openssl.org>

Check for __GNUC__ to use GNU C atomic buildins

Note: we trust any other compiler that fully implements GNU extension
to define __GNUC__

RT#4642

Reviewed-by: Andy Polyakov <appro@openssl.org>

Trust RSA_check_key() to return correct values

In apps/rsa.c, we were second guessing RSA_check_key() to leave error
codes lying around without returning -1 properly.  However, this also
catches other errors that are lying around and that we should not care
about.

Reviewed-by: Rich Salz <rsalz@openssl.org>

Avoid overflow in MDC2_Update()

Thanks to Shi Lei for reporting this issue.

CVE-2016-6303

Reviewed-by: Matt Caswell <matt@openssl.org>

Put DES into "not default" category.

Add CVE to CHANGES

Reviewed-by: Emilia Käsper <emilia@openssl.org>

To avoid SWEET32 attack, move 3DES to weak

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>

Typo fixes

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Updates the CT_POLICY_EVAL_CTX POD

Ownership semantics and function names have changed.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Correct documentation about SCT setters resetting validation status

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Removes the SCT_verify* POD

SCT_verify_v1 has been removed and SCT_verify is no longer part of the
public API.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Documents the SCT validation functions

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Removes {o2i,i2o}_SCT_signature from PODs

These functions have been removed from the public API.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Documents the CTLOG functions

CTLOG_new_null() has been removed from the code, so it has also been
removed from this POD.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Document the i2o and o2i SCT functions

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Removes d2i_SCT_LIST.pod

This is covered by d2i_X509.pod.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Document that SCT_set_source returns 0 on failure.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Clarifies the format of a log's public key in the CONF file

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Refer to OPENSSLDIR rather than "the OpenSSL install directory"

The prior wording was less accurate.
See https://github.com/openssl/openssl/pull/1372#discussion_r73127000.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Adds history section to CT PODs

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Fixes final issue in CT PODs highlighted by util/find-doc-nits.pl

Fixes complaint "ct missing from SYNOPSIS".

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Renames CT_POLICY_EVAL_CTX.pod to CT_POLICY_EVAL_CTX_new.pod

util/fix-doc-nits.pl complains that
"CT_POLICY_EVAL_CTX (filename) missing from NAME section".

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Adds copyright section to ct.pod

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Adds newline after =cut in PODs

util/find-doc-nits.pl complains that the file "doesn't end with =cut".

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Adds missing function names to NAME section of PODs

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Add enum definitions to CT pods

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Remove unnecessary bold tags in CT pods

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Add comment about calling CT_POLICY_EVAL_CTX_free

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Fix comment about what SCT_LIST_validate does.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Add SSL_get0_peer_scts to ssl.pod

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Fix comment about return value of ct_extract_tls_extension_scts

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

First draft of CT documentation

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Remove some dead code from rec_layer_s3.c

It is never valid to call ssl3_read_bytes with
type == SSL3_RT_CHANGE_CIPHER_SPEC, and in fact we check for valid values
for type near the beginning of the function. Therefore this check will never
be true and can be removed.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Remove useless assignment

The variable assignment c1 is never read before it is overwritten.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix some resource leaks in the apps

Reviewed-by: Tim Hudson <tjh@openssl.org>

ec/ecp_nistz256: harmonize is_infinity with ec_GFp_simple_is_at_infinity.

RT#4625

Reviewed-by: Rich Salz <rsalz@openssl.org>

ec/ecp_nistz256: harmonize is_infinity with ec_GFp_simple_is_at_infinity.

RT#4625

Reviewed-by: Rich Salz <rsalz@openssl.org>

ec/asm/ecp_nistz256-*.pl: addition to perform stricter reduction.

Addition was not preserving inputs' property of being fully reduced.

Thanks to Brian Smith for reporting this.

Reviewed-by: Rich Salz <rsalz@openssl.org>

ec/asm/ecp_nistz256-x86_64.pl: addition to perform stricter reduction.

Addition was not preserving inputs' property of being fully reduced.

Thanks to Brian Smith for reporting this.

Reviewed-by: Rich Salz <rsalz@openssl.org>

evp/bio_enc.c: stop using pointer arithmetic for error detection.

Thanks to David Benjamin for reporting this.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>