.\" $OpenBSD: tls_ocsp_process_response.3,v 1.4 2017/01/29 18:00:21 beck Exp $
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.\" Copyright (c) 2016 Bob Beck <beck@openbsd.org>
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.Dd $Mdocdate: January 29 2017 $
.Dt TLS_OCSP_PROCESS_RESPONSE 3
.Os
.Sh NAME
.Nm tls_ocsp_process_response ,
.Nm tls_peer_ocsp_cert_status ,
.Nm tls_peer_ocsp_crl_reason ,
.Nm tls_peer_ocsp_next_update ,
.Nm tls_peer_ocsp_response_status ,
.Nm tls_peer_ocsp_result_msg ,
.Nm tls_peer_ocsp_revocation_time ,
.Nm tls_peer_ocsp_this_update ,
.Nm tls_peer_ocsp_url
.Nd inspect an OCSP response
.Sh SYNOPSIS
.In tls.h
.Ft int
.Fo tls_ocsp_process_response
.Fa "struct tls *ctx"
.Fa "const unsigned char *response"
.Fa "size_t size"
.Fc
.Ft int
.Fn tls_peer_ocsp_cert_status "struct tls *ctx"
.Ft int
.Fn tls_peer_ocsp_crl_reason "struct tls *ctx"
.Ft time_t
.Fn tls_peer_ocsp_next_update "struct tls *ctx"
.Ft int
.Fn tls_peer_ocsp_response_status "struct tls *ctx"
.Ft const char *
.Fn tls_peer_ocsp_result_msg "struct tls *ctx"
.Ft time_t
.Fn tls_peer_ocsp_revocation_time "struct tls *ctx"
.Ft time_t
.Fn tls_peer_ocsp_this_update "struct tls *ctx"
.Ft const char *
.Fn tls_peer_ocsp_url "struct tls *ctx"
.Sh DESCRIPTION
.Fn tls_ocsp_process_response
processes a raw OCSP response in
.Ar response
of size
.Ar size
to check the revocation status of the peer certificate from
.Ar ctx .
A successful return code of 0 indicates that the certificate
has not been revoked.
.Pp
.Fn tls_peer_ocsp_url
returns the URL for OCSP validation of the peer certificate from
.Ar ctx .
.Pp
The following functions return information about the peer certificate from
.Ar ctx
that was obtained by validating a stapled OCSP response during the handshake,
or via a previous call to
.Fn tls_ocsp_process_response .
.Pp
.Fn tls_peer_ocsp_cert_status
returns the OCSP certificate status code as per RFC 6960 section 2.2.
.Pp
.Fn tls_peer_ocsp_crl_reason
returns the OCSP certificate revocation reason status code as per RFC 5280
section 5.3.1.
.Pp
.Fn tls_peer_ocsp_next_update
returns the OCSP next update time.
.Pp
.Fn tls_peer_ocsp_response_status
returns the OCSP response status as per RFC 6960 section 2.3.
.Pp
.\" XXX Fn tls_peer_ocsp_result_msg does what?
.Fn tls_peer_ocsp_revocation_time
returns the OCSP revocation time.
.Pp
.Fn tls_peer_ocsp_this_update
returns the OCSP this update time.
.Sh RETURN VALUES
.Fn tls_ocsp_process_response
returns 0 on success or -1 on error.
.Pp
The
.Fn tls_peer_ocsp_response_status
function returns one of
.Dv TLS_OCSP_RESPONSE_SUCCESSFUL ,
.Dv TLS_OCSP_RESPONSE_MALFORMED ,
.Dv TLS_OCSP_RESPONSE_INTERNALERROR ,
.Dv TLS_OCSP_RESPONSE_TRYLATER ,
.Dv TLS_OCSP_RESPONSE_SIGREQUIRED ,
or
.Dv TLS_OCSP_RESPONSE_UNAUTHORIZED
on success or -1 on error.
.Pp
The
.Fn tls_peer_ocsp_cert_status
function returns one of
.Dv TLS_OCSP_CERT_GOOD ,
.Dv TLS_OCSP_CERT_REVOKED ,
or
.Dv TLS_OCSP_CERT_UNKNOWN
on success, and -1 on error.
.Pp
The
.Fn tls_peer_ocsp_crl_reason
function returns one of
.Dv TLS_CRL_REASON_UNSPECIFIED ,
.Dv TLS_CRL_REASON_KEY_COMPROMISE ,
.Dv TLS_CRL_REASON_CA_COMPROMISE ,
.Dv TLS_CRL_REASON_AFFILIATION_CHANGED ,
.Dv TLS_CRL_REASON_SUPERSEDED ,
.Dv TLS_CRL_REASON_CESSATION_OF_OPERATION ,
.Dv TLS_CRL_REASON_CERTIFICATE_HOLD ,
.Dv TLS_CRL_REASON_REMOVE_FROM_CRL ,
.Dv TLS_CRL_REASON_PRIVILEGE_WITHDRAWN ,
or
.Dv  TLS_CRL_REASON_AA_COMPROMISE
on success or -1 on error.
.Pp
.Fn tls_peer_ocsp_next_update ,
.Fn tls_peer_ocsp_revocation_time ,
and
.Fn tls_peer_ocsp_this_update
return a time in epoch-seconds on success or -1 on error.
.Pp
.Fn tls_peer_ocsp_result_msg
and
.Fn tls_peer_ocsp_url
return
.Dv NULL
on error or an out of memory condition.
.Sh SEE ALSO
.Xr tls_client 3 ,
.Xr tls_config_ocsp_require_stapling 3 ,
.Xr tls_conn_version 3 ,
.Xr tls_connect 3 ,
.Xr tls_handshake 3 ,
.Xr tls_init 3
.Sh HISTORY
These functions appeared in
.Ox 6.1 .
.Sh AUTHORS
.An Bob Beck Aq Mt beck@openbsd.org
.An Marko Kreen Aq Mt markokr@gmail.com