Needed by HPE NonStop NSE and NSX systems

Fixes #2146
Closes #2155

Lists all SSL backends that were enabled at build-time.

Suggested-by: Oleg Pudeyev
Fixes #2128

Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing
only get additional transfers added to them if the existing connection
is held by the same multi or easy handle. libcurl does not support doing
HTTP/2 streams in different threads using a shared connection.

Closes #2152

If the lock is released before the dealings with the bundle is over, it may
have changed by another thread in the mean time.

Fixes #2132
Fixes #2151
Closes #2139

... by removing a superfluous NULL pointer check that also confuses
Coverity.

Fixes #2143
Closes #2153

For pop3/imap/smtp, added test 891 to somewhat verify the pop3
case.

For this, I enhanced the pingpong test server to be able to send back
responses with LF-only instead of always using CRLF.

Closes #2150

Figured out while reviewing code in the libssh backend. The pointer was
checked for NULL after having been dereferenced, so we know it would
always equal true or it would've crashed.

Pointed-out-by: Nikos Mavrogiannopoulos

Bug #2143
Closes #2148

The behavior is now equivalent to ssh.c when SSH_SFTP_QUOTE_STATVFS
handling fails.

Fixes #2142

Closes #2145

The previous code was incorrectly following the libssh2 error detection
for libssh2_sftp_statvfs, which is not correct for libssh's sftp_statvfs.

Fixes #2142

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

Fixes #2141

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

- remove superfluous NULL check which otherwise tricks the static code
analyzers to assume NULL pointer dereferences.

- fix fallthrough in switch()

- indent mistake

Removes another #ifdef for BoringSSL

Pointed-out-by: David Benjamin

Closes #2134

.. since now mac osx image expects pip2 or pip3, and doesn't know pip:

0.01s$ pip install --user cpp-coveralls
/Users/travis/.travis/job_stages: line 57: pip: command not found

Ref: https://github.com/travis-ci/travis-ci/issues/8829

Closes https://github.com/curl/curl/pull/2133

This SFTP test fails with libssh back-end due to failure to verify
the peer. Disable peer verification in the test as there seems to
be the intention of the test.

Note that the libssh back-end automatically verifies the peer's
host using the default known_hosts file.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

The SFTP back-end supports asynchronous reading only, limited
to 32-bit file length. Writing is synchronous with no other
limitations.

This also brings keyboard-interactive authentication.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

This brings its in sync with the error code returned by the
libssh backend.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

That also updates tests to expect the right error code

libssh2 back-end returns CURLE_SSH error if the remote file
is not found. Expect instead CURLE_REMOTE_FILE_NOT_FOUND
which is sent by the libssh backend.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

libssh is an alternative library to libssh2.
https://www.libssh.org/



That patch set also introduces support for ECDSA
ed25519 keys, as well as gssapi authentication.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

Absent any 'symbol map' or script to limit what gets exported, static
linking of libraries previously resulted in a libcurl with curl's and
those other symbols being (re-)exported.

This did not happen if 'versioned symbols' were enabled (which is not
the default) because then a version script is employed.

This limits exports to everything starting in 'curl_*'., which is
what "libcurl.vers" exports.

This avoids strange side-effects such as with mixing methods
from system libraries and those erroneously offered by libcurl.

Closes #2127

Originally, my idea was to allocate the two structures (or more
precisely, the connectdata structure and the four SSL backend-specific
strucutres required for ssl[0..1] and proxy_ssl[0..1]) in one go, so
that they all could be free()d together.

However, getting the alignment right is tricky. Too tricky.

So let's just bite the bullet and allocate the SSL backend-specific
data separately.

As a consequence, we now have to be very careful to release the memory
allocated for the SSL backend-specific data whenever we release any
connectdata.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Closes #2119

Reported-by: Dima Tisnek

Uses a separate build without --enable-debug and no valgrind.

The debug option causes far too many warnings in boringssl's headers
(C++ comments, trailing commas etc).  Valgrind triggers some false
positive errors in thread-local data used by boringssl.

Closes #2118

commit d3ab7c5a broke the boringssl build since it doesn't have
RSA_flags(), so we disable that code block for boringssl builds.

Reported-by: W. Mark Kubacki
Fixes #2117

This bit is no longer used. It is not clear what it meant for users to
"init the TLS" in a world with different TLS backends and since the
introduction of multissl, libcurl didn't properly work if inited without
this bit set.

Not a single user responded to the call for users of it:
https://curl.haxx.se/mail/lib-2017-11/0072.html

Reported-by: Evgeny Grin
Assisted-by: Jay Satiro

Fixes #2089
Fixes #2083
Closes #2107

Reported-by: Alex Nichols
Assisted-by: Kamil Dudka and Max Dymond

CVE-2017-8816

Bug: https://curl.haxx.se/docs/adv_2017-11e7.html

The code would previous read beyond the end of the pattern string if the
match pattern ends with an open bracket when the default pattern
matching function is used.

Detected by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4161

CVE-2017-8817

Bug: https://curl.haxx.se/docs/adv_2017-ae72.html

- Align the array of ssl_backend_data on a max 32 byte boundary.

8 is likely to be ok but I went with 32 for posterity should one of
the ssl_backend_data structs change to contain a larger sized variable
in the future.

Prior to this change (since dev 70f1db32, release 7.56) the connectdata
structure was undersized by 4 bytes in 32-bit builds with ssl enabled
because long long * was mistakenly used for alignment instead of
long long, with the intention being an 8 byte boundary. Also long long
may not be an available type.

The undersized connectdata could lead to oob read/write past the end in
what was expected to be the last 4 bytes of the connection's secondary
socket https proxy ssl_backend_data struct (the secondary socket in a
connection is used by ftp, others?).

Closes https://github.com/curl/curl/issues/2093

CVE-2017-8818

Bug: https://curl.haxx.se/docs/adv_2017-af0a.html

With this check present, scan-build warns that we might dereference this
point in other places where it isn't first checked for NULL. Thus, if it
*can* be NULL we have a problem on a few places. However, this pointer
should not be possible to be NULL here so I remove the check and thus
also three different scan-build warnings.

Closes #2111