ckch_conf loading is not that simple as it requires to check
- if the cert already exists in the ckchs_tree
- if the ckch_conf is compatible with an existing cert in ckchs_tree
- if the cert is a bundle which need to load multiple ckch_store
This logic could be reuse elsewhere, so this commit introduce the new
crtlist_load_crt() function which does that.
This patch allows the usage of "crt-store" keywords from a "crt-list".
The crtstore_parse_load() function was splitted into 2 functions, so the
keywords parsing is done in ckch_conf_parse().
With this patch, crt are loaded with ckch_store_new_load_files_conf() or
ckch_store_new_load_files_path() depending on weither or not there is a
"crt-store" keyword.
More checks need to be done on "crt" bind keywords to ensure that
keywords are compatible.
This patch does not introduce the feature on the CLI.
If an unknown CA file was first mentioned in an "add ssl crt-list" CLI
command, it would result in a call to X509_STORE_load_locations which
performs a disk access which is forbidden during runtime. The same would
happen if a "ca-verify-file" or "crl-file" was specified. This was due
to the fact that the crt-list file parsing and the crt-list related CLI
commands parsing use the same functions.
The patch simply adds a new parameter to all the ssl_bind parsing
functions so that they know if the call is made during init or by the
CLI, and the ssl_store_load_locations function can then reject any new
cafile_entry creation coming from a CLI call.
It can be backported as far as 2.2.
Add some functions to deinit the whole crtlist and ckch architecture.
It will free all crtlist, crtlist_entry, ckch_store, ckch_inst and their
associated SNI, ssl_conf and SSL_CTX.
The SSL_CTX in the default_ctx and initial_ctx still needs to be free'd
separately.
