In order to connect to brokers that support both websockets and
mqtt on the same port (such as Amazon IoT), we need to set an
application for the SSL context. This change allows the specification
of an application by using the `bridge_alpn` configuration token.
Signed-off-by: John Hickey <jjh-github@daedalian.us>
Some OpenSSL engines (selectable via tls_engine option) may require a
password to make use of private keys created with them in the first place.
The TPM engine for example, will require a password to access the underlying
TPM's Storage Root Key (SRK), which is the root key of a hierarchy of keys
associated with a TPM; it is generated within a TPM and is a non-migratable
key. Each owned TPM contains a SRK, generated by the TPM at the request
of the Owner. [1]
By default, the engine will prompt the user to introduce the SRK password
before any private keys created with the engine can be used. This could
be inconvenient when running on an unattended system.
Here's where the new tls_engine_kpass_sha option comes in handy. The user
can specify a SHA1 hash of its engine private key password via command
line or config file and it will be passed on to the engine directly.
This commit adds support for both clients (libmosquitto) and broker.
[1] https://goo.gl/qQoXBY
Signed-off-by: Nicolás Pernas Maradei <nicopernas@gmail.com>
- Clients can now offload crypto tasks to an external crypto device through
the OpenSSL ENGINE API.
- The keyfiles can now be treated as PEM or ENGINE keys.
- Two new functions were added to libmosquitto to set up the previously
mentioned features.
- Both mosquitto_sub and mosquitto_pub include support to turn on the mentioned
features through command line options.
Signed-off-by: Nicolás Pernas Maradei <nicopernas@gmail.com>
Previous behaviour would clear the external SSL_CTX provided by
MOSQ_OPT_SSL_CTX. This required the user to reset the SSL_CTX every
disconnect, and trust that they were not leaking references.
Recreating the SSL context for every connection is not necessary, and the
SSL context is freed in mosquitto_destroy, which is sufficient.
Signed-off-by: Matthias Stone <matthias@bellstone.ca>
Roger A. Light
Karl Palsson
John Hickey
krismattheus
Nicolás Pernas Maradei
Matthias Stone
Fredrik Fornwall
Thomas Beckmann (M-Way)