/*
* Copyright (C) 2015-2018 Tobias Brunner
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
* Copyright (C) 2009 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <time.h>
#include "revocation_validator.h"
#include <utils/debug.h>
#include <credentials/certificates/x509.h>
#include <credentials/certificates/crl.h>
#include <credentials/certificates/ocsp_request.h>
#include <credentials/certificates/ocsp_response.h>
#include <credentials/sets/ocsp_response_wrapper.h>
#include <selectors/traffic_selector.h>
#include <threading/spinlock.h>
typedef struct private_revocation_validator_t private_revocation_validator_t;
/**
* Private data of an revocation_validator_t object.
*/
struct private_revocation_validator_t {
/**
* Public revocation_validator_t interface.
*/
revocation_validator_t public;
/**
* Enable OCSP validation
*/
bool enable_ocsp;
/**
* Enable CRL validation
*/
bool enable_crl;
/**
* Lock to access flags
*/
spinlock_t *lock;
};
/**
* Do an OCSP request
*/
static certificate_t *fetch_ocsp(char *url, certificate_t *subject,
certificate_t *issuer)
{
certificate_t *request, *response;
ocsp_request_t *ocsp_request;
ocsp_response_t *ocsp_response;
chunk_t send, receive = chunk_empty;
/* TODO: requestor name, signature */
request = lib->creds->create(lib->creds,
CRED_CERTIFICATE, CERT_X509_OCSP_REQUEST,
BUILD_CA_CERT, issuer,
BUILD_CERT, subject, BUILD_END);
if (!request)
{
DBG1(DBG_CFG, "generating ocsp request failed");
return NULL;
}
if (!request->get_encoding(request, CERT_ASN1_DER, &send))
{
DBG1(DBG_CFG, "encoding ocsp request failed");
request->destroy(request);
return NULL;
}
DBG1(DBG_CFG, " requesting ocsp status from '%s' ...", url);
if (lib->fetcher->fetch(lib->fetcher, url, &receive,
FETCH_REQUEST_DATA, send,
FETCH_REQUEST_TYPE, "application/ocsp-request",
FETCH_END) != SUCCESS)
{
DBG1(DBG_CFG, "ocsp request to %s failed", url);
request->destroy(request);
chunk_free(&receive);
chunk_free(&send);
return NULL;
}
chunk_free(&send);
response = lib->creds->create(lib->creds,
CRED_CERTIFICATE, CERT_X509_OCSP_RESPONSE,
BUILD_BLOB_ASN1_DER, receive, BUILD_END);
chunk_free(&receive);
if (!response)
{
DBG1(DBG_CFG, "parsing ocsp response failed");
request->destroy(request);
return NULL;
}
ocsp_request = (ocsp_request_t*)request;
ocsp_response = (ocsp_response_t*)response;
if (ocsp_response->get_nonce(ocsp_response).len &&
!chunk_equals_const(ocsp_request->get_nonce(ocsp_request),
ocsp_response->get_nonce(ocsp_response)))
{
DBG1(DBG_CFG, "nonce in ocsp response doesn't match");
request->destroy(request);
return NULL;
}
request->destroy(request);
return response;
}
/**
* check the signature of an OCSP response
*/
static bool verify_ocsp(ocsp_response_t *response, certificate_t *ca)
{
certificate_t *issuer, *subject;
identification_t *responder;
ocsp_response_wrapper_t *wrapper;
enumerator_t *enumerator;
x509_t *x509;
bool verified = FALSE, found = FALSE;
wrapper = ocsp_response_wrapper_create((ocsp_response_t*)response);
lib->credmgr->add_local_set(lib->credmgr, &wrapper->set, FALSE);
subject = &response->certificate;
responder = subject->get_issuer(subject);
/* check OCSP response using CA or directly delegated OCSP signer */
enumerator = lib->credmgr->create_cert_enumerator(lib->credmgr, CERT_X509,
KEY_ANY, responder, FALSE);
while (enumerator->enumerate(enumerator, &issuer))
{
x509 = (x509_t*)issuer;
if (!issuer->get_validity(issuer, NULL, NULL, NULL))
{ /* OCSP signer currently invalid */
continue;
}
if (!ca->equals(ca, issuer))
{ /* delegated OCSP signer? */
if (!lib->credmgr->issued_by(lib->credmgr, issuer, ca, NULL))
{ /* OCSP response not signed by CA, nor delegated OCSP signer */
continue;
}
if (!(x509->get_flags(x509) & X509_OCSP_SIGNER))
{ /* delegated OCSP signer does not have OCSP signer flag */
continue;
}
}
found = TRUE;
if (lib->credmgr->issued_by(lib->credmgr, subject, issuer, NULL))
{
DBG1(DBG_CFG, " ocsp response correctly signed by \"%Y\"",
issuer->get_subject(issuer));
verified = TRUE;
break;
}
DBG1(DBG_CFG, "ocsp response verification failed, "
"invalid signature");
}
enumerator->destroy(enumerator);
if (!verified)
{
/* as fallback, use any locally installed OCSP signer certificate */
enumerator = lib->credmgr->create_cert_enumerator(lib->credmgr,
CERT_X509, KEY_ANY, responder, TRUE);
while (enumerator->enumerate(enumerator, &issuer))
{
x509 = (x509_t*)issuer;
/* while issued_by() accepts both OCSP signer or CA basic
* constraint flags to verify OCSP responses, unrelated but trusted
* OCSP signers must explicitly have the OCSP signer flag set. */
if ((x509->get_flags(x509) & X509_OCSP_SIGNER) &&
issuer->get_validity(issuer, NULL, NULL, NULL))
{
found = TRUE;
if (lib->credmgr->issued_by(lib->credmgr, subject, issuer, NULL))
{
DBG1(DBG_CFG, " ocsp response correctly signed by \"%Y\"",
issuer->get_subject(issuer));
verified = TRUE;
break;
}
DBG1(DBG_CFG, "ocsp response verification failed, "
"invalid signature");
}
}
enumerator->destroy(enumerator);
}
lib->credmgr->remove_local_set(lib->credmgr, &wrapper->set);
wrapper->destroy(wrapper);
if (!found)
{
DBG1(DBG_CFG, "ocsp response verification failed, "
"no signer certificate '%Y' found", responder);
}
return verified;
}
/**
* Get the better of two OCSP responses, and check for usable OCSP info
*/
static certificate_t *get_better_ocsp(certificate_t *cand, certificate_t *best,
x509_t *subject, x509_t *issuer,
cert_validation_t *valid, bool cache)
{
ocsp_response_t *response;
time_t revocation, this_update, next_update, valid_until;
crl_reason_t reason;
bool revoked = FALSE;
response = (ocsp_response_t*)cand;
/* check ocsp signature */
if (!verify_ocsp(response, &issuer->interface))
{
cand->destroy(cand);
return best;
}
/* check if response contains our certificate */
switch (response->get_status(response, subject, issuer, &revocation, &reason,
&this_update, &next_update))
{
case VALIDATION_REVOKED:
/* subject has been revoked by a valid OCSP response */
DBG1(DBG_CFG, "certificate was revoked on %T, reason: %N",
&revocation, TRUE, crl_reason_names, reason);
revoked = TRUE;
break;
case VALIDATION_GOOD:
/* results in either good or stale */
break;
default:
case VALIDATION_FAILED:
/* candidate unusable, does not contain our cert */
DBG1(DBG_CFG, " ocsp response contains no status on our certificate");
cand->destroy(cand);
return best;
}
/* select the better of the two responses */
if (best == NULL || certificate_is_newer(cand, best))
{
DESTROY_IF(best);
best = cand;
if (best->get_validity(best, NULL, NULL, &valid_until))
{
DBG1(DBG_CFG, " ocsp response is valid: until %T",
&valid_until, FALSE);
*valid = VALIDATION_GOOD;
if (cache)
{ /* cache non-stale only, stale certs get refetched */
lib->credmgr->cache_cert(lib->credmgr, best);
}
}
else
{
DBG1(DBG_CFG, " ocsp response is stale: since %T",
&valid_until, FALSE);
*valid = VALIDATION_STALE;
}
}
else
{
*valid = VALIDATION_STALE;
cand->destroy(cand);
}
if (revoked)
{ /* revoked always counts, even if stale */
*valid = VALIDATION_REVOKED;
}
return best;
}
/**
* validate a x509 certificate using OCSP
*/
static cert_validation_t check_ocsp(x509_t *subject, x509_t *issuer,
auth_cfg_t *auth)
{
enumerator_t *enumerator;
cert_validation_t valid = VALIDATION_SKIPPED;
certificate_t *best = NULL, *current;
identification_t *keyid = NULL;
public_key_t *public;
chunk_t chunk;
char *uri = NULL;
/** lookup cache for valid OCSP responses */
enumerator = lib->credmgr->create_cert_enumerator(lib->credmgr,
CERT_X509_OCSP_RESPONSE, KEY_ANY, NULL, FALSE);
while (enumerator->enumerate(enumerator, ¤t))
{
current->get_ref(current);
best = get_better_ocsp(current, best, subject, issuer, &valid, FALSE);
if (best && valid != VALIDATION_STALE)
{
DBG1(DBG_CFG, " using cached ocsp response");
break;
}
}
enumerator->destroy(enumerator);
/* derive the authorityKeyIdentifier from the issuer's public key */
current = &issuer->interface;
public = current->get_public_key(current);
if (public && public->get_fingerprint(public, KEYID_PUBKEY_SHA1, &chunk))
{
keyid = identification_create_from_encoding(ID_KEY_ID, chunk);
}
/** fetch from configured OCSP responder URLs */
if (keyid && valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED)
{
enumerator = lib->credmgr->create_cdp_enumerator(lib->credmgr,
CERT_X509_OCSP_RESPONSE, keyid);
while (enumerator->enumerate(enumerator, &uri))
{
current = fetch_ocsp(uri, &subject->interface, &issuer->interface);
if (current)
{
best = get_better_ocsp(current, best, subject, issuer,
&valid, TRUE);
if (best && valid != VALIDATION_STALE)
{
break;
}
}
}
enumerator->destroy(enumerator);
}
DESTROY_IF(public);
DESTROY_IF(keyid);
/* fallback to URL fetching from subject certificate's URIs */
if (valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED)
{
enumerator = subject->create_ocsp_uri_enumerator(subject);
while (enumerator->enumerate(enumerator, &uri))
{
current = fetch_ocsp(uri, &subject->interface, &issuer->interface);
if (current)
{
best = get_better_ocsp(current, best, subject, issuer,
&valid, TRUE);
if (best && valid != VALIDATION_STALE)
{
break;
}
}
}
enumerator->destroy(enumerator);
}
/* an uri was found, but no result. switch validation state to failed */
if (valid == VALIDATION_SKIPPED && uri)
{
valid = VALIDATION_FAILED;
}
auth->add(auth, AUTH_RULE_OCSP_VALIDATION, valid);
if (valid == VALIDATION_GOOD)
{ /* successful OCSP check fulfills also CRL constraint */
auth->add(auth, AUTH_RULE_CRL_VALIDATION, VALIDATION_GOOD);
}
DESTROY_IF(best);
return valid;
}
/**
* fetch a CRL from an URL
*/
static certificate_t* fetch_crl(char *url)
{
certificate_t *crl;
chunk_t chunk = chunk_empty;
DBG1(DBG_CFG, " fetching crl from '%s' ...", url);
if (lib->fetcher->fetch(lib->fetcher, url, &chunk, FETCH_END) != SUCCESS)
{
DBG1(DBG_CFG, "crl fetching failed");
chunk_free(&chunk);
return NULL;
}
crl = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509_CRL,
BUILD_BLOB_PEM, chunk, BUILD_END);
chunk_free(&chunk);
if (!crl)
{
DBG1(DBG_CFG, "crl fetched successfully but parsing failed");
return NULL;
}
return crl;
}
/**
* check the signature of an CRL
*/
static bool verify_crl(certificate_t *crl)
{
certificate_t *issuer;
enumerator_t *enumerator;
bool verified = FALSE;
enumerator = lib->credmgr->create_trusted_enumerator(lib->credmgr,
KEY_ANY, crl->get_issuer(crl), FALSE);
while (enumerator->enumerate(enumerator, &issuer, NULL))
{
if (lib->credmgr->issued_by(lib->credmgr, crl, issuer, NULL))
{
DBG1(DBG_CFG, " crl correctly signed by \"%Y\"",
issuer->get_subject(issuer));
verified = TRUE;
break;
}
}
enumerator->destroy(enumerator);
return verified;
}
/**
* Report the given CRL's validity and cache it if valid and requested
*/
static bool is_crl_valid(certificate_t *crl, time_t now, bool cache)
{
time_t valid_until;
if (crl->get_validity(crl, &now, NULL, &valid_until))
{
DBG1(DBG_CFG, " crl is valid: until %T", &valid_until, FALSE);
if (cache)
{
lib->credmgr->cache_cert(lib->credmgr, crl);
}
return TRUE;
}
DBG1(DBG_CFG, " crl is stale: since %T", &valid_until, FALSE);
return FALSE;
}
/**
* Check if the CRL should be used yet
*/
static bool is_crl_not_valid_yet(certificate_t *crl, time_t now)
{
time_t this_update;
if (!crl->get_validity(crl, &now, &this_update, NULL))
{
if (this_update > now)
{
DBG1(DBG_CFG, " crl is not valid: until %T", &this_update, FALSE);
return TRUE;
}
/* we accept stale CRLs */
}
return FALSE;
}
/**
* Get the better of two CRLs, and check for usable CRL info
*/
static certificate_t *get_better_crl(certificate_t *cand, certificate_t *best,
x509_t *subject, cert_validation_t *valid,
bool cache, crl_t *base)
{
enumerator_t *enumerator;
time_t now, revocation;
crl_reason_t reason;
chunk_t subject_serial, serial;
crl_t *crl = (crl_t*)cand;
if (base)
{
if (!crl->is_delta_crl(crl, &serial) ||
!chunk_equals(serial, base->get_serial(base)))
{
cand->destroy(cand);
return best;
}
}
else
{
if (crl->is_delta_crl(crl, NULL))
{
cand->destroy(cand);
return best;
}
}
/* check CRL signature */
if (!verify_crl(cand))
{
DBG1(DBG_CFG, "crl response verification failed");
cand->destroy(cand);
return best;
}
now = time(NULL);
if (is_crl_not_valid_yet(cand, now))
{
cand->destroy(cand);
return best;
}
subject_serial = chunk_skip_zero(subject->get_serial(subject));
enumerator = crl->create_enumerator(crl);
while (enumerator->enumerate(enumerator, &serial, &revocation, &reason))
{
if (chunk_equals(subject_serial, chunk_skip_zero(serial)))
{
if (reason != CRL_REASON_CERTIFICATE_HOLD)
{
*valid = VALIDATION_REVOKED;
}
else
{
/* if the cert is on hold, a newer CRL might not contain it */
*valid = VALIDATION_ON_HOLD;
}
is_crl_valid(cand, now, cache);
DBG1(DBG_CFG, "certificate was revoked on %T, reason: %N",
&revocation, TRUE, crl_reason_names, reason);
enumerator->destroy(enumerator);
DESTROY_IF(best);
return cand;
}
}
enumerator->destroy(enumerator);
/* select the better of the two CRLs */
if (best == NULL || crl_is_newer(crl, (crl_t*)best))
{
DESTROY_IF(best);
best = cand;
if (is_crl_valid(best, now, cache))
{
*valid = VALIDATION_GOOD;
}
else
{
*valid = VALIDATION_STALE;
}
}
else
{
*valid = VALIDATION_STALE;
cand->destroy(cand);
}
return best;
}
/**
* Find or fetch a certificate for a given crlIssuer
*/
static cert_validation_t find_crl(x509_t *subject, identification_t *issuer,
crl_t *base, certificate_t **best,
bool *uri_found)
{
cert_validation_t valid = VALIDATION_SKIPPED;
enumerator_t *enumerator;
certificate_t *current;
char *uri;
/* find a cached (delta) crl */
enumerator = lib->credmgr->create_cert_enumerator(lib->credmgr,
CERT_X509_CRL, KEY_ANY, issuer, FALSE);
while (enumerator->enumerate(enumerator, ¤t))
{
current->get_ref(current);
*best = get_better_crl(current, *best, subject, &valid, FALSE, base);
if (*best && valid != VALIDATION_STALE)
{
DBG1(DBG_CFG, " using cached crl");
break;
}
}
enumerator->destroy(enumerator);
/* fallback to fetching crls from credential sets cdps */
if (!base && valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED)
{
enumerator = lib->credmgr->create_cdp_enumerator(lib->credmgr,
CERT_X509_CRL, issuer);
while (enumerator->enumerate(enumerator, &uri))
{
*uri_found = TRUE;
current = fetch_crl(uri);
if (current)
{
if (!current->has_issuer(current, issuer))
{
DBG1(DBG_CFG, "issuer of fetched CRL '%Y' does not match CRL "
"issuer '%Y'", current->get_issuer(current), issuer);
current->destroy(current);
continue;
}
*best = get_better_crl(current, *best, subject,
&valid, TRUE, base);
if (*best && valid != VALIDATION_STALE)
{
break;
}
}
}
enumerator->destroy(enumerator);
}
return valid;
}
/**
* Check if the issuer of the given CRL matches
*/
static bool check_issuer(certificate_t *crl, x509_t *issuer, x509_cdp_t *cdp)
{
certificate_t *cissuer = (certificate_t*)issuer;
identification_t *id;
chunk_t chunk;
bool matches = FALSE;
if (cdp->issuer)
{
return crl->has_issuer(crl, cdp->issuer);
}
/* check SKI/AKI first, but fall back to DN matching */
chunk = issuer->get_subjectKeyIdentifier(issuer);
if (chunk.len)
{
id = identification_create_from_encoding(ID_KEY_ID, chunk);
matches = crl->has_issuer(crl, id);
id->destroy(id);
}
return matches || crl->has_issuer(crl, cissuer->get_subject(cissuer));
}
/**
* Look for a delta CRL for a given base CRL
*/
static cert_validation_t check_delta_crl(x509_t *subject, x509_t *issuer,
crl_t *base, cert_validation_t base_valid)
{
cert_validation_t valid = VALIDATION_SKIPPED;
certificate_t *best = NULL, *current, *cissuer = (certificate_t*)issuer;
enumerator_t *enumerator;
identification_t *id;
x509_cdp_t *cdp;
chunk_t chunk;
bool uri;
/* find cached delta CRL via subjectKeyIdentifier */
chunk = issuer->get_subjectKeyIdentifier(issuer);
if (chunk.len)
{
id = identification_create_from_encoding(ID_KEY_ID, chunk);
valid = find_crl(subject, id, base, &best, &uri);
id->destroy(id);
}
/* find delta CRL by CRLIssuer */
enumerator = subject->create_crl_uri_enumerator(subject);
while (valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED &&
enumerator->enumerate(enumerator, &cdp))
{
if (cdp->issuer)
{
valid = find_crl(subject, cdp->issuer, base, &best, &uri);
}
}
enumerator->destroy(enumerator);
/* fetch from URIs found in Freshest CRL extension */
enumerator = base->create_delta_crl_uri_enumerator(base);
while (valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED &&
enumerator->enumerate(enumerator, &cdp))
{
current = fetch_crl(cdp->uri);
if (current)
{
if (!check_issuer(current, issuer, cdp))
{
DBG1(DBG_CFG, "issuer of fetched delta CRL '%Y' does not match "
"certificate's %sissuer '%Y'",
current->get_issuer(current), cdp->issuer ? "CRL " : "",
cdp->issuer ?: cissuer->get_subject(cissuer));
current->destroy(current);
continue;
}
best = get_better_crl(current, best, subject, &valid, TRUE, base);
if (best && valid != VALIDATION_STALE)
{
break;
}
}
}
enumerator->destroy(enumerator);
if (best)
{
best->destroy(best);
return valid;
}
return base_valid;
}
/**
* validate a x509 certificate using CRL
*/
static cert_validation_t check_crl(x509_t *subject, x509_t *issuer,
auth_cfg_t *auth)
{
cert_validation_t valid = VALIDATION_SKIPPED;
certificate_t *best = NULL, *cissuer = (certificate_t*)issuer;
identification_t *id;
x509_cdp_t *cdp;
bool uri_found = FALSE;
certificate_t *current;
enumerator_t *enumerator;
chunk_t chunk;
/* use issuers subjectKeyIdentifier to find a cached CRL / fetch from CDP */
chunk = issuer->get_subjectKeyIdentifier(issuer);
if (chunk.len)
{
id = identification_create_from_encoding(ID_KEY_ID, chunk);
valid = find_crl(subject, id, NULL, &best, &uri_found);
id->destroy(id);
}
/* find a cached CRL or fetch via configured CDP via CRLIssuer */
enumerator = subject->create_crl_uri_enumerator(subject);
while (valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED &&
enumerator->enumerate(enumerator, &cdp))
{
if (cdp->issuer)
{
valid = find_crl(subject, cdp->issuer, NULL, &best, &uri_found);
}
}
enumerator->destroy(enumerator);
/* fallback to fetching CRLs from CDPs found in subjects certificate */
if (valid != VALIDATION_GOOD && valid != VALIDATION_REVOKED)
{
enumerator = subject->create_crl_uri_enumerator(subject);
while (enumerator->enumerate(enumerator, &cdp))
{
uri_found = TRUE;
current = fetch_crl(cdp->uri);
if (current)
{
if (!check_issuer(current, issuer, cdp))
{
DBG1(DBG_CFG, "issuer of fetched CRL '%Y' does not match "
"certificate's %sissuer '%Y'",
current->get_issuer(current), cdp->issuer ? "CRL " : "",
cdp->issuer ?: cissuer->get_subject(cissuer));
current->destroy(current);
continue;
}
best = get_better_crl(current, best, subject, &valid,
TRUE, NULL);
if (best && valid != VALIDATION_STALE)
{
break;
}
}
}
enumerator->destroy(enumerator);
}
/* look for delta CRLs */
if (best && (valid == VALIDATION_GOOD || valid == VALIDATION_STALE))
{
valid = check_delta_crl(subject, issuer, (crl_t*)best, valid);
}
/* an uri was found, but no result. switch validation state to failed */
if (valid == VALIDATION_SKIPPED && uri_found)
{
valid = VALIDATION_FAILED;
}
if (valid == VALIDATION_SKIPPED)
{ /* if we skipped CRL validation, we use the result of OCSP for
* constraint checking */
auth->add(auth, AUTH_RULE_CRL_VALIDATION,
auth->get(auth, AUTH_RULE_OCSP_VALIDATION));
}
else
{
auth->add(auth, AUTH_RULE_CRL_VALIDATION, valid);
}
DESTROY_IF(best);
return valid;
}
METHOD(cert_validator_t, validate, bool,
private_revocation_validator_t *this, certificate_t *subject,
certificate_t *issuer, bool online, u_int pathlen, bool anchor,
auth_cfg_t *auth)
{
bool enable_ocsp, enable_crl;
this->lock->lock(this->lock);
enable_ocsp = this->enable_ocsp;
enable_crl = this->enable_crl;
this->lock->unlock(this->lock);
if (online && (enable_ocsp || enable_crl) &&
subject->get_type(subject) == CERT_X509 &&
issuer->get_type(issuer) == CERT_X509)
{
DBG1(DBG_CFG, "checking certificate status of \"%Y\"",
subject->get_subject(subject));
if (enable_ocsp)
{
switch (check_ocsp((x509_t*)subject, (x509_t*)issuer, auth))
{
case VALIDATION_GOOD:
DBG1(DBG_CFG, "certificate status is good");
return TRUE;
case VALIDATION_REVOKED:
case VALIDATION_ON_HOLD:
/* has already been logged */
lib->credmgr->call_hook(lib->credmgr, CRED_HOOK_REVOKED,
subject);
return FALSE;
case VALIDATION_SKIPPED:
DBG2(DBG_CFG, "ocsp check skipped, no ocsp found");
break;
case VALIDATION_STALE:
DBG1(DBG_CFG, "ocsp information stale, fallback to crl");
break;
case VALIDATION_FAILED:
DBG1(DBG_CFG, "ocsp check failed, fallback to crl");
break;
}
}
else
{
auth->add(auth, AUTH_RULE_OCSP_VALIDATION, VALIDATION_SKIPPED);
}
if (enable_crl)
{
switch (check_crl((x509_t*)subject, (x509_t*)issuer, auth))
{
case VALIDATION_GOOD:
DBG1(DBG_CFG, "certificate status is good");
return TRUE;
case VALIDATION_REVOKED:
case VALIDATION_ON_HOLD:
/* has already been logged */
lib->credmgr->call_hook(lib->credmgr, CRED_HOOK_REVOKED,
subject);
return FALSE;
case VALIDATION_FAILED:
case VALIDATION_SKIPPED:
DBG1(DBG_CFG, "certificate status is not available");
break;
case VALIDATION_STALE:
DBG1(DBG_CFG, "certificate status is unknown, crl is stale");
break;
}
}
else
{
auth->add(auth, AUTH_RULE_CRL_VALIDATION,
auth->get(auth, AUTH_RULE_OCSP_VALIDATION));
}
lib->credmgr->call_hook(lib->credmgr, CRED_HOOK_VALIDATION_FAILED,
subject);
}
return TRUE;
}
METHOD(revocation_validator_t, reload, void,
private_revocation_validator_t *this)
{
bool enable_ocsp, enable_crl;
enable_ocsp = lib->settings->get_bool(lib->settings,
"%s.plugins.revocation.enable_ocsp", TRUE, lib->ns);
enable_crl = lib->settings->get_bool(lib->settings,
"%s.plugins.revocation.enable_crl", TRUE, lib->ns);
this->lock->lock(this->lock);
this->enable_ocsp = enable_ocsp;
this->enable_crl = enable_crl;
this->lock->unlock(this->lock);
if (!enable_ocsp)
{
DBG1(DBG_LIB, "all OCSP validation disabled");
}
if (!enable_crl)
{
DBG1(DBG_LIB, "all CRL validation disabled");
}
}
METHOD(revocation_validator_t, destroy, void,
private_revocation_validator_t *this)
{
this->lock->destroy(this->lock);
free(this);
}
/**
* See header
*/
revocation_validator_t *revocation_validator_create()
{
private_revocation_validator_t *this;
INIT(this,
.public = {
.validator.validate = _validate,
.reload = _reload,
.destroy = _destroy,
},
.lock = spinlock_create(),
);
reload(this);
return &this->public;
}
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