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ACCESS_DESCRIPTION_NEW(3) DragonFly Library Functions Manual
AUTHORITY_INFO_ACCESS_new, AUTHORITY_INFO_ACCESS_free - X.509 information
Using the information access extensions, certificates and certificate
revocation lists can point to auxiliary information and services
available online, for example online validation services or CA policy
ACCESS_DESCRIPTION_new() allocates and initializes an empty
ACCESS_DESCRIPTION object, representing an ASN.1 AccessDescription
structure defined in RFC 5280 section 220.127.116.11. It can hold a pointer to
a GENERAL_NAME object documented in GENERAL_NAME_new(3) and an access
method identifier. ACCESS_DESCRIPTION_free() frees ad.
The access method identifier is somewhat misnamed; it identifies the type
and format of the information provided. How to access that information
is often obvious from the GENERAL_NAME which may for example include a
uniform resource identifier.
Four standard access method identifiers are defined in RFC 5280:
* "id-ad-caIssuers" can occur in the authority information access
extension of certificates and certificate revocation lists and
provides access to certificates issued to the CA that issued the
certificate, or provides access to certificates used for signing the
CRL, in order to help constructing a certification path.
* "id-ad-ocsp" can occur in the authority information access extension
of certificates and provides access to revocation information via the
Online Certificate Status Protocol (OCSP) defined in RFC 6960.
* "id-ad-caRepository" can occur in the subject information access
extension of CA certificates and provides access to an online
repository of certificates issued by the CA.
* "id-ad-timeStamping" can occur in the subject information access
extension of end entity certificates and indicates that the subject
offers timestamping services using the Time Stamp Protocol defined in
AUTHORITY_INFO_ACCESS_new() allocates and initializes an empty
AUTHORITY_INFO_ACCESS object, which is a STACK_OF(ACCESS_DESCRIPTION) and
represents an ASN.1 AuthorityInfoAccessSyntax structure defined in RFC
5280 section 18.104.22.168. If can be used for the authority information
access extension of certificates and certificate revocation lists and for
the subject information access extension of certificates.
AUTHORITY_INFO_ACCESS_free() frees aia.
ACCESS_DESCRIPTION_new() and AUTHORITY_INFO_ACCESS_new() return the new
ACCESS_DESCRIPTION or AUTHORITY_INFO_ACCESS object, respectively, or NULL
if an error occurs.
d2i_ACCESS_DESCRIPTION(3), DIST_POINT_new(3), GENERAL_NAME_new(3),
OCSP_REQUEST_new(3), TS_REQ_new(3), X509_CRL_new(3),
These extensions are only defined in the following RFC and not specified
in the underlying X.509 standard.
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile:
- section 22.214.171.124: Certificate Extensions: Authority Information Access
- section 126.96.36.199: Certificate Extensions: Subject Information Access
- section 5.2.7: CRL Extensions: Authority Information Access
Regarding OCSP and TSP, see:
RFC 6960: X.509 Internet Public Key Infrastructure Online Certificate
RFC 3161: Internet X.509 Public Key Infrastructure Time-Stamp Protocol
AUTHORITY_INFO_ACCESS_new(), and AUTHORITY_INFO_ACCESS_free() first
appeared in OpenSSL 0.9.5 and have been available since OpenBSD 2.7.
DragonFly 5.9-DEVELOPMENT June 6, 2019 DragonFly 5.9-DEVELOPMENT