ssl_crl_cache_api

Module

ssl_crl_cache_api

Module Summary

API for a SSL/TLS CRL (Certificate Revocation List) cache.

Description

When SSL/TLS performs certificate path validation according to RFC 5280 it should also perform CRL validation checks. To enable the CRL checks the application needs access to CRLs. A database of CRLs can be set up in many different ways. This module provides the behavior of the API needed to integrate an arbitrary CRL cache with the erlang ssl application. It is also used by the application itself to provide a simple default implementation of a CRL cache.

Data types

The following data types are used in the functions below:

cache_ref() =: opaque()
dist_point() =: #'DistributionPoint'{} see X509 certificates records

Exports

`fresh_crl(DistributionPoint, CRL) -> FreshCRL`

Types

fun fresh_crl/2 will be used as input option update_crl to public_key:pkix_crls_validate/3

`lookup(DistributionPoint, Issuer, DbHandle) -> not_available | CRLslookup(DistributionPoint, DbHandle) -> not_available | CRLs`

Types

Lookup the CRLs belonging to the distribution point Distributionpoint. This function may choose to only look in the cache or to follow distribution point links depending on how the cache is administrated.

The Issuer argument contains the issuer name of the certificate to be checked. Normally the returned CRL should be issued by this issuer, except if the cRLIssuer field of DistributionPoint has a value, in which case that value should be used instead.

In an earlier version of this API, the lookup function received two arguments, omitting Issuer. For compatibility, this is still supported: if there is no lookup/3 function in the callback module, lookup/2 is called instead.

`select(Issuer, DbHandle) -> CRLs`

Types

Select the CRLs in the cache that are issued by Issuer