The cache is stored per connection object and is cleared on
* entry of wrong password
* release of connection object
* successful connection
It can be configured that libstrophe retries the password entry in case
the user entered a wrong password.
Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>
In order to be able to load password-protected key files a password
callback was added.
This also adds support for PKCS#12 containers instead of certificate+key.
Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>
Const variables in prototypes don't add much value, but make the code
larger and redundant. Remove these const keywords.
Note, this doesn't apply to pointers to const memory.
Make it possible to reset password to NULL. It is not required for
ANONYMOUS authentication. Also, report an error and disconnect if
password is not set and libstrophe should try authentication mechanisms
other than ANONYMOUS.
Introduced UNUSED macro with cast to void in commoh.h for internal
use. Used cast to void directly in those files which do not
include common.h. Although this change doesn't fix semantic issues
with unused function parameters, it does explicitly mark all those
places, which might require attention in future.
* Add SCRAM_DIGEST_SIZE macro for maximum possible digest size. It will
avoid new buffer overflow errors when new digests are added.
* Fix buffer overflow in sasl_scram(). Buffers were allocated for SHA1
digest size.
* Fix bug with handler re-registration when a SASL SCRAM mechanism
fails.
@sjaeckel integrated clang-format with formal coding style. Run his
script and commit changes.
There are pros and cons of this commit.
Mixed coding style is a "broken window". A good single style simplifies
reading and writing code.
On the other hand, this is a big change which will lead to conflicts.
PLAIN mechanism sends password in BASE64 encoding which everyone can
read. As result, debug logs expose password and users often don't remove
it when post the logs in the Internet.
Usually, both a secure mechanism and PLAIN are used in the scenario when
username or password is incorrect. PLAIN fails in this scenario anyway.
Legacy authentication can expose password in plaintext. Since this is
not widely used mechanism, disable it by default. It can be enabled back
with connection option XMPP_CONN_FLAG_LEGACY_AUTH.
There are places where code relies on well-formed stanzas and expects
that ns attribute is always present. Check whether ns NULL or not before
passing it to strcmp().
Fixes#121.
RFC6121 removes the precondition of establishing a session before a client
may exchange XML stanzas on an XMPP network.
This PR allows libstrophe to not request session where it is indicated
as optional by the server, saving a round trip.
https://tools.ietf.org/html/rfc6121#section-1.4
Instead, keep the same handler until connection is disconnected. Stream
is opened 3 times during usual workflow. Deleting/restoring the handler
every time brings more places for possible mistakes.
Default opening tag doesn't allow to implement XEP-0174. In this case
client needs to send specific attributes. As solution user passes
attributes that are sent inside opening tag. Previous variant of this
function is renamed to xmpp_conn_open_stream_default().
The way to pass attributes is not the best one, but it's used to conform
existent interface of xmpp_stanza_get_attributes().
Remove "raw" suffix from functions that work with a raw connection.
This function is similar to xmpp_connect_client(), but doesn't perform
authentication. Instead, it calls user's connection handler immediately
after establishing the connection. Hence, user can implement own
authendication or registration procedures.
Such a "raw" connection can be useful when user interaction is required
(e.g. Data Forms in XEP-0077, OAuth2).
* Removed dependency from internal headers in rand.h. xmpp_rand
interface can be public in the future;
* xmpp_rand functions accept xmpp_rand_t object instead of xmpp_ctx_t.
If interface function returns char* the result must be freed with
xmpp_free().
In case of const char* the result must not be changed by user. Also, the
result is valid only during stanza lifetime.
xmpp_conn_set_flags() and xmpp_conn_get_flags() unify interface of
connection configuration.
This interface allows compile-time check of supported features or even
run-time check. Therefore, applications can be built with older
libstrophe which doesn't support some optional flags.
sha1.c contains symbols that overlap with libcrypto. This patch
fixes linking with libstrophe as static library.
Prefix crypto_ will help to group other crypto API in the future.
This pseudo-random number generator solves problem with
platform-independent generation of randomized nonces.
Current implementation uses weak entropy, especially when
kernel.randomize_va_space = 0. But it can be improved by
adding new sources to xmpp_rand_reseed().
New internal API introduced:
xmpp_rand_new
xmpp_rand_free
xmpp_rand
xmpp_rand_bytes
xmpp_rand_nonce
