OCSP_resp_find_status, OCSP_resp_count, OCSP_resp_get0, OCSP_resp_find, OCSP_single_get0_status, OCSP_resp_get0_produced_at, OCSP_resp_get0_signature, OCSP_resp_get0_tbs_sigalg, OCSP_resp_get0_respdata, OCSP_resp_get0_certs, OCSP_resp_get0_signer, OCSP_resp_get0_id, OCSP_resp_get1_id, OCSP_check_validity, OCSP_basic_verify - OCSP response utility functions
#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);
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 via the 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() is the same as OCSP_resp_get0_id() but leaves ownership of *pid and *pname with the caller, who is responsible for freeing them unless the function returns 0.
OCSP_check_validity()
checks the validity of its thisupd and nextupd
arguments, 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 then searches the certificates the responder may have included
in bs unless flags contains OCSP_NOINTERN.
It fails if the signer certificate cannot be found.
Next, unless flags contains OCSP_NOSIGS, the function checks
the signature of bs and fails on error. Then the function already returns
success if flags contains OCSP_NOVERIFY or if the signer certificate
was found in certs and flags contains OCSP_TRUSTOTHER.
Otherwise the function continues by validating the signer certificate.
If flags contains OCSP_PARTIAL_CHAIN it takes intermediate CA
certificates in st as trust anchors.
For more details, see the description of X509_V_FLAG_PARTIAL_CHAIN
in X509_VERIFY_PARAM_set_flags(3)/VERIFICATION FLAGS.
If flags contains OCSP_NOCHAIN it ignores all certificates in certs
and in bs, else it takes them as untrusted intermediate CA certificates
and uses them for constructing the validation path for the signer certificate.
Certificate revocation status checks using CRLs is disabled during path validation
if the signer certificate contains the id-pkix-ocsp-no-check extension.
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
OCSP_NOEXPLICIT flag is not set the function checks for explicit
trust for OCSP signing in the root CA certificate.
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
or -1 on error.
OCSP_resp_get0() returns a pointer to an OCSP_SINGLERESP structure or NULL on error, such as idx being out of range.
OCSP_resp_find()
returns the index of id in bs (which may be 0)
or -1 on error, such as when id was not found.
OCSP_single_get0_status() returns the status of single or -1 if an error occurred.
OCSP_resp_get0_produced_at() returns the producedAt field from bs.
OCSP_resp_get0_signature() returns the signature from bs.
OCSP_resp_get0_tbs_sigalg() returns the signatureAlgorithm field from bs.
OCSP_resp_get0_respdata() returns the tbsResponseData field from bs.
OCSP_resp_get0_certs() returns any certificates included in bs.
OCSP_resp_get0_signer() returns 1 if the signing certificate was located, or 0 if not found or on error.
OCSP_resp_get0_id() and OCSP_resp_get1_id() return 1 on success, 0 on failure.
OCSP_check_validity()
returns 1 if thisupd and nextupd are valid time
values and the current time + sec is not before thisupd and,
if maxsec >= 0, the current time - maxsec is not past nextupd.
Otherwise it returns 0 to indicate an error.
OCSP_basic_verify()
returns 1 on success, 0 on verification not successful,
or -1 on a fatal error such as malloc failure.
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.
crypto(7), OCSP_cert_to_id(3), OCSP_request_add1_nonce(3), OCSP_REQUEST_new(3), OCSP_response_status(3), OCSP_sendreq_new(3), X509_VERIFY_PARAM_set_flags(3)
Copyright 2015-2022 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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.