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OCSP_check_validity.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>OCSP_resp_find_status</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>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</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #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);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>OCSP_resp_find_status() searches <b>bs</b> for an OCSP response for <b>id</b>. If it is successful the fields of the response are returned in <b>*status</b>, <b>*reason</b>, <b>*revtime</b>, <b>*thisupd</b> and <b>*nextupd</b>. The <b>*status</b> value will be one of <b>V_OCSP_CERTSTATUS_GOOD</b>, <b>V_OCSP_CERTSTATUS_REVOKED</b> or <b>V_OCSP_CERTSTATUS_UNKNOWN</b>. The <b>*reason</b> and <b>*revtime</b> fields are only set if the status is <b>V_OCSP_CERTSTATUS_REVOKED</b>. If set the <b>*reason</b> field will be set to the revocation reason which will be one of <b>OCSP_REVOKED_STATUS_NOSTATUS</b>, <b>OCSP_REVOKED_STATUS_UNSPECIFIED</b>, <b>OCSP_REVOKED_STATUS_KEYCOMPROMISE</b>, <b>OCSP_REVOKED_STATUS_CACOMPROMISE</b>, <b>OCSP_REVOKED_STATUS_AFFILIATIONCHANGED</b>, <b>OCSP_REVOKED_STATUS_SUPERSEDED</b>, <b>OCSP_REVOKED_STATUS_CESSATIONOFOPERATION</b>, <b>OCSP_REVOKED_STATUS_CERTIFICATEHOLD</b> or <b>OCSP_REVOKED_STATUS_REMOVEFROMCRL</b>.</p> <p>OCSP_resp_count() returns the number of <b>OCSP_SINGLERESP</b> structures in <b>bs</b>.</p> <p>OCSP_resp_get0() returns the <b>OCSP_SINGLERESP</b> structure in <b>bs</b> corresponding to index <b>idx</b>. Where <b>idx</b> runs from 0 to OCSP_resp_count(bs) - 1.</p> <p>OCSP_resp_find() searches <b>bs</b> for <b>id</b> and returns the index of the first matching entry after <b>last</b> or starting from the beginning if <b>last</b> is -1.</p> <p>OCSP_single_get0_status() extracts the fields of <b>single</b> in <b>*reason</b>, <b>*revtime</b>, <b>*thisupd</b> and <b>*nextupd</b>.</p> <p>OCSP_resp_get0_produced_at() extracts the <b>producedAt</b> field from the single response <b>bs</b>.</p> <p>OCSP_resp_get0_signature() returns the signature from <b>bs</b>.</p> <p>OCSP_resp_get0_tbs_sigalg() returns the <b>signatureAlgorithm</b> from <b>bs</b>.</p> <p>OCSP_resp_get0_respdata() returns the <b>tbsResponseData</b> from <b>bs</b>.</p> <p>OCSP_resp_get0_certs() returns any certificates included in <b>bs</b>.</p> <p>OCSP_resp_get0_signer() attempts to retrieve the certificate that directly signed <b>bs</b>. The OCSP protocol does not require that this certificate is included in the <b>certs</b> field of the response, so additional certificates can be supplied in <b>extra_certs</b> if the certificates that may have signed the response are known via some out-of-band mechanism.</p> <p>OCSP_resp_get0_id() gets the responder id of <b>bs</b>. If the responder ID is a name then <*pname> is set to the name and <b>*pid</b> is set to NULL. If the responder ID is by key ID then <b>*pid</b> is set to the key ID and <b>*pname</b> is set to NULL. OCSP_resp_get1_id() leaves ownership of <b>*pid</b> and <b>*pname</b> 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.</p> <p>OCSP_check_validity() checks the validity of <b>thisupd</b> and <b>nextupd</b> values which will be typically obtained from OCSP_resp_find_status() or OCSP_single_get0_status(). If <b>sec</b> is nonzero it indicates how many seconds leeway should be allowed in the check. If <b>maxsec</b> is positive it indicates the maximum age of <b>thisupd</b> in seconds.</p> <p>OCSP_basic_verify() checks that the basic response message <b>bs</b> is correctly signed and that the signer certificate can be validated. It takes <b>st</b> as the trusted store and <b>certs</b> 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 <b>bs</b> unless the <b>flags</b> contain <b>OCSP_NOINTERN</b>. It fails if the signer certificate cannot be found. Next, the function checks the signature of <b>bs</b> and fails on error unless the <b>flags</b> contain <b>OCSP_NOSIGS</b>. Then the function already returns success if the <b>flags</b> contain <b>OCSP_NOVERIFY</b> or if the signer certificate was found in <b>certs</b> and the <b>flags</b> contain <b>OCSP_TRUSTOTHER</b>. Otherwise the function continues by validating the signer certificate. To this end, all certificates in <b>cert</b> and in <b>bs</b> are considered as untrusted certificates for the construction of the validation path for the signer certificate unless the <b>OCSP_NOCHAIN</b> flag is set. After successful path validation the function returns success if the <b>OCSP_NOCHECKS</b> 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 <b>flags</b> do not contain <b>OCSP_NOEXPLICIT</b> the function checks for explicit trust for OCSP signing in the root CA certificate.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>OCSP_resp_find_status() returns 1 if <b>id</b> is found in <b>bs</b> and 0 otherwise.</p> <p>OCSP_resp_count() returns the total number of <b>OCSP_SINGLERESP</b> fields in <b>bs</b>.</p> <p>OCSP_resp_get0() returns a pointer to an <b>OCSP_SINGLERESP</b> structure or <b>NULL</b> if <b>idx</b> is out of range.</p> <p>OCSP_resp_find() returns the index of <b>id</b> in <b>bs</b> (which may be 0) or -1 if <b>id</b> was not found.</p> <p>OCSP_single_get0_status() returns the status of <b>single</b> or -1 if an error occurred.</p> <p>OCSP_resp_get0_signer() returns 1 if the signing certificate was located, or 0 on error.</p> <p>OCSP_basic_verify() returns 1 on success, 0 on error, or -1 on fatal error such as malloc failure.</p> <h1 id="NOTES">NOTES</h1> <p>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.</p> <p>An OCSP response for a certificate contains <b>thisUpdate</b> and <b>nextUpdate</b> fields. Normally the current time should be between these two values. To account for clock skew the <b>maxsec</b> field can be set to nonzero in OCSP_check_validity(). Some responders do not set the <b>nextUpdate</b> field, this would otherwise mean an ancient response would be considered valid: the <b>maxsec</b> parameter to OCSP_check_validity() can be used to limit the permitted age of responses.</p> <p>The values written to <b>*revtime</b>, <b>*thisupd</b> and <b>*nextupd</b> by OCSP_resp_find_status() and OCSP_single_get0_status() are internal pointers which <b>MUST NOT</b> be freed up by the calling application. Any or all of these parameters can be set to NULL if their value is not required.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man7/crypto.html">crypto(7)</a>, <a href="../man3/OCSP_cert_to_id.html">OCSP_cert_to_id(3)</a>, <a href="../man3/OCSP_request_add1_nonce.html">OCSP_request_add1_nonce(3)</a>, <a href="../man3/OCSP_REQUEST_new.html">OCSP_REQUEST_new(3)</a>, <a href="../man3/OCSP_response_status.html">OCSP_response_status(3)</a>, <a href="../man3/OCSP_sendreq_new.html">OCSP_sendreq_new(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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