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*) core/mod_ssl/mod_md: adding OCSP response provisioning as core feature. This
allows modules to access and provide OCSP response data without being tied
of each other. The data is exchanged in standard, portable formats (PEM encoded
certificates and DER encoded responses), so that the actual SSL/crypto
implementations used by the modules are independant of each other.
Registration and retrieval happen in the context of a server (server_rec)
which modules may use to decide if they are configured for this or not.
The area of changes:
1. core: defines 2 functions in include/http_ssl.h, so that modules may
register a certificate, together with its issuer certificate for OCSP
response provisioning and ask for current response data (DER bytes) later.
Also, 2 hooks are defined that allow modules to implement this OCSP
provisioning.
2. mod_ssl uses the new functions, in addition to what it did already, to
register its certificates this way. If no one is interested in providing
OCSP, it falls back to its own (if configured) stapling implementation.
3. mod_md registers itself at the core hooks for OCSP provisioning. Depending
on configuration, it will accept registrations of its own certificates only,
all certficates or none.
[Stefan Eissing]
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