OCSP_RESP_FIND_STATUS(3) OpenSSL OCSP_RESP_FIND_STATUS(3)
NAME
OCSP_resp_get0_certs, OCSP_resp_get0_signer, OCSP_resp_get0_id,
OCSP_resp_get1_id, OCSP_resp_get0_produced_at,
OCSP_resp_get0_signature, OCSP_resp_get0_tbs_sigalg,
OCSP_resp_get0_respdata, OCSP_resp_find_status, OCSP_resp_count,
OCSP_resp_get0, OCSP_resp_find, OCSP_single_get0_status,
OCSP_check_validity, OCSP_basic_verify - OCSP response utility
functions
SYNOPSIS
#include <openssl/ocsp.h>
int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
int *reason,
ASN1_GENERALIZEDTIME **revtime,
ASN1_GENERALIZEDTIME **thisupd,
ASN1_GENERALIZEDTIME **nextupd);
int OCSP_resp_count(OCSP_BASICRESP *bs);
OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx);
int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last);
int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
ASN1_GENERALIZEDTIME **revtime,
ASN1_GENERALIZEDTIME **thisupd,
ASN1_GENERALIZEDTIME **nextupd);
const ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(
const OCSP_BASICRESP* single);
const ASN1_OCTET_STRING *OCSP_resp_get0_signature(const OCSP_BASICRESP *bs);
const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *bs);
const OCSP_RESPDATA *OCSP_resp_get0_respdata(const OCSP_BASICRESP *bs);
const STACK_OF(X509) *OCSP_resp_get0_certs(const OCSP_BASICRESP *bs);
int OCSP_resp_get0_signer(OCSP_BASICRESP *bs, X509 **signer,
STACK_OF(X509) *extra_certs);
int OCSP_resp_get0_id(const OCSP_BASICRESP *bs,
const ASN1_OCTET_STRING **pid,
const X509_NAME **pname);
int OCSP_resp_get1_id(const OCSP_BASICRESP *bs,
ASN1_OCTET_STRING **pid,
X509_NAME **pname);
int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,
ASN1_GENERALIZEDTIME *nextupd,
long sec, long maxsec);
int OCSP_basic_verify(OCSP_BASICRESP *bs, STACK_OF(X509) *certs,
X509_STORE *st, unsigned long flags);
DESCRIPTION
OCSP_resp_find_status() searches bs for an OCSP response for id. If it
is successful the fields of the response are returned in *status,
*reason, *revtime, *thisupd and *nextupd. The *status value will be
one of V_OCSP_CERTSTATUS_GOOD, V_OCSP_CERTSTATUS_REVOKED or
V_OCSP_CERTSTATUS_UNKNOWN. The *reason and *revtime fields are only set
if the status is V_OCSP_CERTSTATUS_REVOKED. If set the *reason field
will be set to the revocation reason which will be one of
OCSP_REVOKED_STATUS_NOSTATUS, OCSP_REVOKED_STATUS_UNSPECIFIED,
OCSP_REVOKED_STATUS_KEYCOMPROMISE, OCSP_REVOKED_STATUS_CACOMPROMISE,
OCSP_REVOKED_STATUS_AFFILIATIONCHANGED, OCSP_REVOKED_STATUS_SUPERSEDED,
OCSP_REVOKED_STATUS_CESSATIONOFOPERATION,
OCSP_REVOKED_STATUS_CERTIFICATEHOLD or
OCSP_REVOKED_STATUS_REMOVEFROMCRL.
OCSP_resp_count() returns the number of OCSP_SINGLERESP structures in
bs.
OCSP_resp_get0() returns the OCSP_SINGLERESP structure in bs
corresponding to index idx. Where idx runs from 0 to
OCSP_resp_count(bs) - 1.
OCSP_resp_find() searches bs for id and returns the index of the first
matching entry after last or starting from the beginning if last is -1.
OCSP_single_get0_status() extracts the fields of single in *reason,
*revtime, *thisupd and *nextupd.
OCSP_resp_get0_produced_at() extracts the producedAt field from the
single response bs.
OCSP_resp_get0_signature() returns the signature from bs.
OCSP_resp_get0_tbs_sigalg() returns the signatureAlgorithm from bs.
OCSP_resp_get0_respdata() returns the tbsResponseData from bs.
OCSP_resp_get0_certs() returns any certificates included in bs.
OCSP_resp_get0_signer() attempts to retrieve the certificate that
directly signed bs. The OCSP protocol does not require that this
certificate is included in the certs field of the response, so
additional certificates can be supplied in extra_certs if the
certificates that may have signed the response are known via some out-
of-band mechanism.
OCSP_resp_get0_id() gets the responder id of bs. If the responder ID is
a name then <*pname> is set to the name and *pid is set to NULL. If the
responder ID is by key ID then *pid is set to the key ID and *pname is
set to NULL. OCSP_resp_get1_id() leaves ownership of *pid and *pname
with the caller, who is responsible for freeing them. Both functions
return 1 in case of success and 0 in case of failure. If
OCSP_resp_get1_id() returns 0, no freeing of the results is necessary.
OCSP_check_validity() checks the validity of thisupd and nextupd values
which will be typically obtained from OCSP_resp_find_status() or
OCSP_single_get0_status(). If sec is nonzero it indicates how many
seconds leeway should be allowed in the check. If maxsec is positive it
indicates the maximum age of thisupd in seconds.
OCSP_basic_verify() checks that the basic response message bs is
correctly signed and that the signer certificate can be validated. It
takes st as the trusted store and certs as a set of untrusted
intermediate certificates. The function first tries to find the signer
certificate of the response in <certs>. It also searches the
certificates the responder may have included in bs unless the flags
contain OCSP_NOINTERN. It fails if the signer certificate cannot be
found. Next, the function checks the signature of bs and fails on
error unless the flags contain OCSP_NOSIGS. Then the function already
returns success if the flags contain OCSP_NOVERIFY or if the signer
certificate was found in certs and the flags contain OCSP_TRUSTOTHER.
Otherwise the function continues by validating the signer certificate.
To this end, all certificates in cert and in bs are considered as
untrusted certificates for the construction of the validation path for
the signer certificate unless the OCSP_NOCHAIN flag is set. After
successful path validation the function returns success if the
OCSP_NOCHECKS flag is set. Otherwise it verifies that the signer
certificate meets the OCSP issuer criteria including potential
delegation. If this does not succeed and the flags do not contain
OCSP_NOEXPLICIT the function checks for explicit trust for OCSP signing
in the root CA certificate.
RETURN VALUES
OCSP_resp_find_status() returns 1 if id is found in bs and 0 otherwise.
OCSP_resp_count() returns the total number of OCSP_SINGLERESP fields in
bs.
OCSP_resp_get0() returns a pointer to an OCSP_SINGLERESP structure or
NULL if idx is out of range.
OCSP_resp_find() returns the index of id in bs (which may be 0) or -1
if id was not found.
OCSP_single_get0_status() returns the status of single or -1 if an
error occurred.
OCSP_resp_get0_signer() returns 1 if the signing certificate was
located, or 0 on error.
OCSP_basic_verify() returns 1 on success, 0 on error, or -1 on fatal
error such as malloc failure.
NOTES
Applications will typically call OCSP_resp_find_status() using the
certificate ID of interest and then check its validity using
OCSP_check_validity(). They can then take appropriate action based on
the status of the certificate.
An OCSP response for a certificate contains thisUpdate and nextUpdate
fields. Normally the current time should be between these two values.
To account for clock skew the maxsec field can be set to nonzero in
OCSP_check_validity(). Some responders do not set the nextUpdate field,
this would otherwise mean an ancient response would be considered
valid: the maxsec parameter to OCSP_check_validity() can be used to
limit the permitted age of responses.
The values written to *revtime, *thisupd and *nextupd by
OCSP_resp_find_status() and OCSP_single_get0_status() are internal
pointers which MUST NOT be freed up by the calling application. Any or
all of these parameters can be set to NULL if their value is not
required.
SEE ALSO
crypto(7), OCSP_cert_to_id(3), OCSP_request_add1_nonce(3),
OCSP_REQUEST_new(3), OCSP_response_status(3), OCSP_sendreq_new(3)
COPYRIGHT
Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>;.
1.1.1k 2021-03-25 OCSP_RESP_FIND_STATUS(3)
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