xref: /openbsd/lib/libcrypto/man/OCSP_SERVICELOC_new.3 (revision 69abbf6c)

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.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
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.Dd $Mdocdate: December 14 2016 $
.Dt OCSP_SERVICELOC_NEW 3
.Os
.Sh NAME
.Nm OCSP_SERVICELOC_new ,
.Nm OCSP_SERVICELOC_free ,
.Nm OCSP_url_svcloc_new
.Nd OCSP service locator extension
.Sh SYNOPSIS
.In openssl/ocsp.h
.Ft OCSP_SERVICELOC *
.Fn OCSP_SERVICELOC_new void
.Ft void
.Fn OCSP_SERVICELOC_free "OCSP_SERVICELOC *sloc"
.Ft X509_EXTENSION *
.Fo OCSP_url_svcloc_new
.Fa "X509_NAME *issuer"
.Fa "char **urls"
.Fc
.Sh DESCRIPTION
Due to restrictions of network routing, a client may be unable to
directly contact the authoritative OCSP server for a certificate
that needs to be checked.
In that case, the request can be sent via a proxy server.
An ASN.1 ServiceLocator structure is included in the
singleRequestExtensions field of the Request structure to indicate
where to forward the request.
The ServiceLocator is represented by a
.Vt OCSP_SERVICELOC
object, which will be stored inside the
.Vt OCSP_ONEREQ
object documented in
.Xr OCSP_ONEREQ_new 3 .
.Pp
.Fn OCSP_SERVICELOC_new
allocates and initializes an empty
.Vt OCSP_SERVICELOC
object.
.Fn OCSP_SERVICELOC_free
frees
.Fa sloc .
.Pp
.Fn OCSP_url_svcloc_new
requires an
.Fa issuer
name and optionally accepts an array of
.Fa urls .
If
.Fa urls
or its first element is
.Dv NULL ,
the locator field is omitted from the ServiceLocator structure
and only the issuer is included.
The resulting ServiceLocator structure is encoded in ASN.1 using
.Xr X509V3_EXT_i2d 3
with criticality 0.
.Sh RETURN VALUES
.Fn OCSP_SERVICELOC_new
returns a new
.Vt OCSP_SERVICELOC
object or
.Dv NULL
if an error occurred.
.Pp
.Fn OCSP_url_svcloc_new
returns a new
.Vt X509_EXTENSION
object or
.Dv NULL
if an error occurred.
.Sh SEE ALSO
.Xr OCSP_REQUEST_new 3 ,
.Xr X509_get_issuer_name 3 ,
.Xr X509_NAME_new 3
.Sh STANDARDS
RFC 6960: X.509 Internet Public Key Infrastructure Online Certificate
Status Protocol, section 4.4.6: Service Locator