--- /dev/null
+/*
+ * Copyright (c) 2005,2011-2015 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+ * SecTrustSettings.cpp - Public interface for manipulation of Trust Settings.
+ *
+ */
+
+#include "SecBridge.h"
+#include "SecCertificatePriv.h"
+#include "SecTrustSettings.h"
+#include "SecTrustSettingsPriv.h"
+#include "SecTrustSettingsCertificates.h"
+#include "TrustSettingsUtils.h"
+#include "TrustSettings.h"
+#include "TrustSettingsSchema.h"
+#include "TrustKeychains.h"
+#include "Trust.h"
+#include "SecKeychainPriv.h"
+#include "Globals.h"
+#include <security_utilities/threading.h>
+#include <security_utilities/globalizer.h>
+#include <security_utilities/errors.h>
+#include <security_cdsa_utilities/cssmerrors.h>
+#include <security_utilities/logging.h>
+#include <security_utilities/debugging.h>
+#include <security_utilities/simpleprefs.h>
+#include <securityd_client/dictionary.h>
+#include <securityd_client/ssclient.h>
+#include <assert.h>
+#include <dlfcn.h>
+#include <libproc.h>
+#include <syslog.h>
+#include <vector>
+#include <CommonCrypto/CommonDigest.h>
+#include <CoreFoundation/CFPreferences.h>
+#include <CoreServices/CoreServicesPriv.h> /* for _CSCheckFix */
+
+#define trustSettingsDbg(args...) secdebug("trustSettings", ## args)
+
+/*
+ * Ideally we'd like to implement our own lock to protect the state of the cert stores
+ * without grabbing the global Sec API lock, but we deal with SecCFObjects, so we'll have
+ * to bite the bullet and grab the big lock. We also have our own lock protecting the
+ * global trust settings cache which is also used by the keychain callback function
+ * (which does not grab the Sec API lock).
+ */
+
+#define BEGIN_RCSAPI \
+ OSStatus __secapiresult; \
+ try {
+#define END_RCSAPI \
+ __secapiresult=errSecSuccess; \
+ } \
+ catch (const MacOSError &err) { __secapiresult=err.osStatus(); } \
+ catch (const CommonError &err) { __secapiresult=SecKeychainErrFromOSStatus(err.osStatus()); } \
+ catch (const std::bad_alloc &) { __secapiresult=errSecAllocate; } \
+ catch (...) { __secapiresult=errSecInternalComponent; } \
+ return __secapiresult;
+
+#define END_RCSAPI0 \
+ catch (...) {} \
+ return;
+
+
+#pragma mark --- TrustSettings preferences ---
+
+/*
+ * If Colonel Klink wants to disable user-level Trust Settings, he'll have
+ * to restart the apps which will be affected after he does so. We are not
+ * going to consult system prefs every time we do a cert evaluation. We
+ * consult it once per process and cache the results here.
+ */
+static bool tsUserTrustDisableValid = false; /* true once we consult prefs */
+static bool tsUserTrustDisable = false; /* the cached value */
+
+/*
+ * Determine whether user-level Trust Settings disabled.
+ */
+static bool tsUserTrustSettingsDisabled()
+{
+ if(tsUserTrustDisableValid) {
+ return tsUserTrustDisable;
+ }
+ tsUserTrustDisable = false;
+
+ Dictionary* dictionary = Dictionary::CreateDictionary(kSecTrustSettingsPrefsDomain, Dictionary::US_System);
+ if (dictionary)
+ {
+ auto_ptr<Dictionary> prefsDict(dictionary);
+ /* this returns false if the pref isn't there, just like we want */
+ tsUserTrustDisable = prefsDict->getBoolValue(kSecTrustSettingsDisableUserTrustSettings);
+ }
+
+ tsUserTrustDisableValid = true;
+ return tsUserTrustDisable;
+}
+
+#pragma mark --- TrustSettings global cache ---
+
+/***
+ *** cache submodule - keeps per-app copy of zero or one TrustSettings
+ *** for each domain. Used only by SecTrustSettingsEvaluateCert()
+ *** and SecTrustSettingsCopyQualifiedCerts(); results of
+ *** manipulation by public API functions are not cached.
+ ***/
+
+/*
+ * API/client code has to hold this lock when doing anything with any of
+ * the TrustSettings maintained here.
+ * It's recursive to accomodate CodeSigning's need to do cert verification
+ * (while we evaluate app equivalence).
+ */
+static ModuleNexus<RecursiveMutex> sutCacheLock;
+
+#define TRUST_SETTINGS_NUM_DOMAINS 3
+
+/*
+ * The three global TrustSettings.
+ * We rely on the fact the the domain enums start with 0; we use
+ * the domain value as an index into the following two arrays.
+ */
+static TrustSettings *globalTrustSettings[TRUST_SETTINGS_NUM_DOMAINS] =
+ {NULL, NULL, NULL};
+
+/*
+ * Indicates "the associated global here is currently valid; if there isn't a
+ * globalTrustSettings[domain], don't try to find one"
+ */
+static bool globalTrustSettingsValid[TRUST_SETTINGS_NUM_DOMAINS] =
+ {false, false, false};
+
+/* remember the fact that we've registered our KC callback */
+static bool sutRegisteredCallback = false;
+
+static void tsRegisterCallback();
+
+/*
+ * Assign global TrustSetting to new incoming value, which may be NULL.
+ * Caller holds sutCacheLock.
+ */
+static void tsSetGlobalTrustSettings(
+ TrustSettings *ts,
+ SecTrustSettingsDomain domain)
+{
+ assert(((int)domain >= 0) && ((int)domain < TRUST_SETTINGS_NUM_DOMAINS));
+
+ trustSettingsDbg("tsSetGlobalTrustSettings domain %d: caching TS %p old TS %p",
+ (int)domain, ts, globalTrustSettings[domain]);
+ delete globalTrustSettings[domain];
+ globalTrustSettings[domain] = ts;
+ globalTrustSettingsValid[domain] = ts ? true : false;
+ tsRegisterCallback();
+}
+
+/*
+ * Obtain global TrustSettings for specified domain if it exists.
+ * Returns NULL if there is simply no TS for that domain.
+ * The TS, if returned, belongs to this cache module.
+ * Caller holds sutCacheLock.
+ */
+static TrustSettings *tsGetGlobalTrustSettings(
+ SecTrustSettingsDomain domain)
+{
+ assert(((int)domain >= 0) && ((int)domain < TRUST_SETTINGS_NUM_DOMAINS));
+
+ if((domain == kSecTrustSettingsDomainUser) && tsUserTrustSettingsDisabled()) {
+ trustSettingsDbg("tsGetGlobalTrustSettings: skipping DISABLED user domain");
+ return NULL;
+ }
+
+ if(globalTrustSettingsValid[domain]) {
+ // ready or not, use this
+ return globalTrustSettings[domain];
+ }
+ assert(globalTrustSettings[domain] == NULL);
+
+ /* try to find one */
+ OSStatus result = errSecSuccess;
+ TrustSettings *ts = NULL;
+ /* don't create; trim if found */
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_NO, TRIM_YES, ts);
+ if ( (domain != kSecTrustSettingsDomainSystem)
+ && (result == errSecInternalComponent)) {
+ /*
+ * Could not connect to ocspd to get the user/admin domain trust settings
+ * This happens in single user mode for example.
+ * Valid flag is set to false and continue.
+ */
+ trustSettingsDbg("tsGetGlobalTrustSettings: could not connect to ocspd for domain (%d)",(int)domain);
+ globalTrustSettingsValid[domain] = false;
+ tsRegisterCallback();
+ return NULL;
+ }
+ else if (result == errSecNoTrustSettings) {
+ /*
+ * No TrustSettings for this domain, actually a fairly common case.
+ * Optimize: don't bother trying this again.
+ */
+ trustSettingsDbg("tsGetGlobalTrustSettings: flagging known NULL");
+ globalTrustSettingsValid[domain] = true;
+ tsRegisterCallback();
+ return NULL;
+ }
+ else if(result != errSecSuccess) {
+ /* gross error */
+ MacOSError::throwMe(result);
+ }
+
+ tsSetGlobalTrustSettings(ts, domain);
+ return ts;
+}
+
+/*
+ * Purge TrustSettings cache.
+ * Called by Keychain Event callback and by our API functions that
+ * modify trust settings.
+ * Caller can NOT hold sutCacheLock.
+ */
+static void tsPurgeCache()
+{
+ int domain;
+
+ StLock<Mutex> _(sutCacheLock());
+ trustSettingsDbg("tsPurgeCache");
+ for(domain=0; domain<TRUST_SETTINGS_NUM_DOMAINS; domain++) {
+ tsSetGlobalTrustSettings(NULL, domain);
+ }
+}
+
+/*
+ * Keychain event callback function, for notification by other processes that
+ * user trust list(s) has/have changed.
+ */
+static OSStatus tsTrustSettingsCallback (
+ SecKeychainEvent keychainEvent,
+ SecKeychainCallbackInfo *info,
+ void *context)
+{
+ trustSettingsDbg("tsTrustSettingsCallback, event %d", (int)keychainEvent);
+ if(keychainEvent != kSecTrustSettingsChangedEvent) {
+ /* should not happen, right? */
+ return errSecSuccess;
+ }
+ if(info->pid == getpid()) {
+ /*
+ * Avoid dup cache invalidates: we already dealt with this event.
+ */
+ trustSettingsDbg("cacheEventCallback: our pid, skipping");
+ }
+ else {
+ tsPurgeCache();
+ }
+ return errSecSuccess;
+}
+
+/*
+ * Ensure that we've registered for kSecTrustSettingsChangedEvent callbacks
+ */
+static void tsRegisterCallback()
+{
+ if(sutRegisteredCallback) {
+ return;
+ }
+ trustSettingsDbg("tsRegisterCallback: registering callback");
+ OSStatus ortn = SecKeychainAddCallback(tsTrustSettingsCallback,
+ kSecTrustSettingsChangedEventMask, NULL);
+ if(ortn) {
+ trustSettingsDbg("tsRegisterCallback: SecKeychainAddCallback returned %d", (int)ortn);
+ /* Not sure how this could ever happen - maybe if there is no run loop active? */
+ }
+ sutRegisteredCallback = true;
+}
+
+#pragma mark --- Static functions ---
+
+
+/*
+ * Called by API code when a trust list has changed; we notify other processes
+ * and purge our own cache.
+ */
+static void tsTrustSettingsChanged()
+{
+ tsPurgeCache();
+
+ /* The only interesting data is our pid */
+ NameValueDictionary nvd;
+ pid_t ourPid = getpid();
+ nvd.Insert (new NameValuePair (PID_KEY,
+ CssmData (reinterpret_cast<void*>(&ourPid), sizeof (pid_t))));
+ CssmData data;
+ nvd.Export (data);
+
+ trustSettingsDbg("tsTrustSettingsChanged: posting notification");
+ SecurityServer::ClientSession cs (Allocator::standard(), Allocator::standard());
+ cs.postNotification (SecurityServer::kNotificationDomainDatabase,
+ kSecTrustSettingsChangedEvent, data);
+ free (data.data ());
+}
+
+/*
+ * Common code for SecTrustSettingsCopyTrustSettings(),
+ * SecTrustSettingsCopyModificationDate().
+ */
+static OSStatus tsCopyTrustSettings(
+ SecCertificateRef cert,
+ SecTrustSettingsDomain domain,
+ CFArrayRef *trustSettings, /* optionally RETURNED */
+ CFDateRef *modDate) /* optionally RETURNED */
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(cert)
+
+ /* obtain fresh full copy from disk */
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_NO, TRIM_NO, ts);
+
+ // rather than throw these results, just return them because we are at the top level
+ if (result == errSecNoTrustSettings) {
+ return errSecItemNotFound;
+ }
+ else if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts); // make sure this gets deleted just in case something throws underneath
+
+ if(trustSettings) {
+ *trustSettings = ts->copyTrustSettings(cert);
+ }
+ if(modDate) {
+ *modDate = ts->copyModDate(cert);
+ }
+
+ END_RCSAPI
+}
+
+static void tsAddConditionalCerts(CFMutableArrayRef certArray);
+
+/*
+ * Common code for SecTrustSettingsCopyQualifiedCerts() and
+ * SecTrustSettingsCopyUnrestrictedRoots().
+ */
+static OSStatus tsCopyCertsCommon(
+ /* usage constraints, all optional */
+ const CSSM_OID *policyOID,
+ const char *policyString,
+ SecTrustSettingsKeyUsage keyUsage,
+ /* constrain to only roots */
+ bool onlyRoots,
+ /* per-domain enables */
+ bool user,
+ bool admin,
+ bool system,
+ CFArrayRef *certArray) /* RETURNED */
+{
+ StLock<Mutex> _TC(sutCacheLock());
+ StLock<Mutex> _TK(SecTrustKeychainsGetMutex());
+
+ TS_REQUIRED(certArray)
+
+ /* this relies on the domain enums being numbered 0..2, user..system */
+ bool domainEnable[3] = {user, admin, system};
+
+ /* we'll retain it again before successful exit */
+ CFRef<CFMutableArrayRef> outArray(CFArrayCreateMutable(NULL, 0,
+ &kCFTypeArrayCallBacks));
+
+ /*
+ * Search all keychains - user's, System.keychain, system root store,
+ * system intermdiates as appropriate
+ */
+ StorageManager::KeychainList keychains;
+ Keychain adminKc;
+ if(user) {
+ globals().storageManager.getSearchList(keychains);
+ }
+ if(user || admin) {
+ adminKc = globals().storageManager.make(ADMIN_CERT_STORE_PATH, false);
+ keychains.push_back(adminKc);
+ }
+ Keychain sysRootKc = globals().storageManager.make(SYSTEM_ROOT_STORE_PATH, false);
+ keychains.push_back(sysRootKc);
+ Keychain sysCertKc = globals().storageManager.make(SYSTEM_CERT_STORE_PATH, false);
+ keychains.push_back(sysCertKc);
+
+ assert(kSecTrustSettingsDomainUser == 0);
+ for(unsigned domain=0; domain<TRUST_SETTINGS_NUM_DOMAINS; domain++) {
+ if(!domainEnable[domain]) {
+ continue;
+ }
+ TrustSettings *ts = tsGetGlobalTrustSettings(domain);
+ if(ts == NULL) {
+ continue;
+ }
+ ts->findQualifiedCerts(keychains,
+ false, /* !findAll */
+ onlyRoots,
+ policyOID, policyString, keyUsage,
+ outArray);
+ }
+ if (system) {
+ tsAddConditionalCerts(outArray);
+ }
+ *certArray = outArray;
+ CFRetain(*certArray);
+ trustSettingsDbg("tsCopyCertsCommon: %ld certs found",
+ CFArrayGetCount(outArray));
+ return errSecSuccess;
+}
+
+#if TARGET_OS_MAC && !TARGET_IPHONE_SIMULATOR && !TARGET_OS_IPHONE && !TARGET_OS_NANO
+/*
+ * _CSCheckFix is implemented in CarbonCore and exported via CoreServices.
+ * To avoid a circular dependency with Security, load this symbol dynamically.
+ */
+typedef Boolean (*CSCheckFix_f)(CFStringRef str);
+
+static dispatch_once_t sTSInitializeOnce = 0;
+static void * sCSCheckFixLibrary = NULL;
+static CSCheckFix_f sCSCheckFix_f = NULL;
+
+static OSStatus _tsEnsuredInitialized(void);
+
+static OSStatus _tsEnsuredInitialized(void)
+{
+ __block OSStatus status = errSecNotAvailable;
+
+ dispatch_once(&sTSInitializeOnce, ^{
+ sCSCheckFixLibrary = dlopen("/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Versions/A/CarbonCore", RTLD_LAZY | RTLD_LOCAL);
+ assert(sCSCheckFixLibrary);
+ if (sCSCheckFixLibrary) {
+ sCSCheckFix_f = (CSCheckFix_f)(uintptr_t) dlsym(sCSCheckFixLibrary, "_CSCheckFix");
+ }
+ });
+
+ if (sCSCheckFix_f) {
+ status = noErr;
+ }
+ return status;
+}
+
+#define APPNAMEWORKAROUND_KEY CFSTR("WorkaroundAppNames")
+#define APPNAMEWORKAROUND_DOMAIN CFSTR("com.apple.security")
+
+static bool tsCheckAppNameWorkaround(const char *name)
+{
+ bool result = false;
+ CFIndex idx, count;
+ CFStringRef str =
+ CFStringCreateWithCString (NULL, name, kCFStringEncodingUTF8);
+ CFArrayRef value = (CFArrayRef)
+ CFPreferencesCopyValue (APPNAMEWORKAROUND_KEY,
+ APPNAMEWORKAROUND_DOMAIN,
+ kCFPreferencesCurrentUser,
+ kCFPreferencesAnyHost);
+ if (!str || !value ||
+ !(CFArrayGetTypeID() == CFGetTypeID(value))) {
+ goto cleanup;
+ }
+ count = CFArrayGetCount(value);
+ for (idx = 0; idx < count; idx++) {
+ CFStringRef appstr = (CFStringRef) CFArrayGetValueAtIndex(value, idx);
+ if (!(appstr) || !(CFStringGetTypeID() == CFGetTypeID(appstr))) {
+ continue;
+ }
+ if (!CFStringCompare(str, appstr, 0)) {
+ result = true;
+ break;
+ }
+ }
+
+cleanup:
+ if (str) {
+ CFRelease(str);
+ }
+ if (value) {
+ CFRelease(value);
+ }
+ return result;
+}
+#endif
+
+static void tsAddConditionalCerts(CFMutableArrayRef certArray)
+{
+#if TARGET_OS_MAC && !TARGET_IPHONE_SIMULATOR && !TARGET_OS_IPHONE && !TARGET_OS_NANO
+ struct certmap_entry_s {
+ const UInt8* data;
+ const CFIndex length;
+ };
+ typedef struct certmap_entry_s certmap_entry_t;
+
+ if (!certArray) { return; }
+
+ pid_t pid = getpid();
+ char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
+ int ret = proc_name(pid, pathbuf, sizeof(pathbuf));
+ if (ret <= 0) { return; }
+
+ OSStatus status = _tsEnsuredInitialized();
+ if ((status == 0 && sCSCheckFix_f(CFSTR("21946795"))) ||
+ tsCheckAppNameWorkaround(pathbuf)) {
+ // conditionally include these 1024-bit roots
+ const certmap_entry_t certmap[] = {
+ { _GTECyberTrustGlobalRootCA, sizeof(_GTECyberTrustGlobalRootCA) },
+ { _VeriSignClass3CA, sizeof(_VeriSignClass3CA) },
+ };
+ unsigned int i, certmaplen = sizeof(certmap) / sizeof(certmap_entry_t);
+ for (i=0; i<certmaplen; i++) {
+ SecCertificateRef cert = SecCertificateCreateWithBytes(NULL,
+ certmap[i].data, certmap[i].length);
+ if (cert) {
+ CFArrayAppendValue(certArray, cert);
+ CFRelease(cert);
+ cert = NULL;
+ }
+ }
+ }
+#else
+ // this function is a no-op on iOS platforms
+#endif
+}
+
+
+#pragma mark --- SPI functions ---
+
+
+/*
+ * Fundamental routine used by TP to ascertain status of one cert.
+ *
+ * Returns true in *foundMatchingEntry if a trust setting matching
+ * specific constraints was found for the cert. Returns true in
+ * *foundAnyEntry if any entry was found for the cert, even if it
+ * did not match the specified constraints. The TP uses this to
+ * optimize for the case where a cert is being evaluated for
+ * one type of usage, and then later for another type. If
+ * foundAnyEntry is false, the second evaluation need not occur.
+ *
+ * Returns the domain in which a setting was found in *foundDomain.
+ *
+ * Allowed errors applying to the specified cert evaluation
+ * are returned in a mallocd array in *allowedErrors and must
+ * be freed by caller.
+ *
+ * The design of the entire TrustSettings module is centered around
+ * optimizing the performance of this routine (security concerns
+ * aside, that is). It's why the per-cert dictionaries are stored
+ * as a dictionary, keyed off of the cert hash. It's why TrustSettings
+ * are cached in memory by tsGetGlobalTrustSettings(), and why those
+ * cached TrustSettings objects are 'trimmed' of dictionary fields
+ * which are not needed to verify a cert.
+ *
+ * The API functions which are used to manipulate Trust Settings
+ * are called infrequently and need not be particularly fast since
+ * they result in user interaction for authentication. Thus they do
+ * not use cached TrustSettings as this function does.
+ */
+OSStatus SecTrustSettingsEvaluateCert(
+ CFStringRef certHashStr,
+ /* parameters describing the current cert evalaution */
+ const CSSM_OID *policyOID,
+ const char *policyString, /* optional */
+ uint32 policyStringLen,
+ SecTrustSettingsKeyUsage keyUsage, /* optional */
+ bool isRootCert, /* for checking default setting */
+ /* RETURNED values */
+ SecTrustSettingsDomain *foundDomain,
+ CSSM_RETURN **allowedErrors, /* mallocd */
+ uint32 *numAllowedErrors,
+ SecTrustSettingsResult *resultType,
+ bool *foundMatchingEntry,
+ bool *foundAnyEntry)
+{
+ BEGIN_RCSAPI
+
+ StLock<Mutex> _(sutCacheLock());
+
+ TS_REQUIRED(certHashStr)
+ TS_REQUIRED(foundDomain)
+ TS_REQUIRED(allowedErrors)
+ TS_REQUIRED(numAllowedErrors)
+ TS_REQUIRED(resultType)
+ TS_REQUIRED(foundMatchingEntry)
+ TS_REQUIRED(foundAnyEntry)
+
+ /* ensure a NULL_terminated string */
+ auto_array<char> polStr;
+ if(policyString != NULL && policyStringLen > 0) {
+ polStr.allocate(policyStringLen + 1);
+ memmove(polStr.get(), policyString, policyStringLen);
+ if(policyString[policyStringLen - 1] != '\0') {
+ (polStr.get())[policyStringLen] = '\0';
+ }
+ }
+
+ /* initial condition - this can grow if we inspect multiple TrustSettings */
+ *allowedErrors = NULL;
+ *numAllowedErrors = 0;
+
+ /*
+ * This loop relies on the ordering of the SecTrustSettingsDomain enum:
+ * search user first, then admin, then system.
+ */
+ assert(kSecTrustSettingsDomainAdmin == (kSecTrustSettingsDomainUser + 1));
+ assert(kSecTrustSettingsDomainSystem == (kSecTrustSettingsDomainAdmin + 1));
+ bool foundAny = false;
+ for(unsigned domain=kSecTrustSettingsDomainUser;
+ domain<=kSecTrustSettingsDomainSystem;
+ domain++) {
+ TrustSettings *ts = tsGetGlobalTrustSettings(domain);
+ if(ts == NULL) {
+ continue;
+ }
+
+ /* validate cert returns true if matching entry was found */
+ bool foundAnyHere = false;
+ bool found = ts->evaluateCert(certHashStr, policyOID,
+ polStr.get(), keyUsage, isRootCert,
+ allowedErrors, numAllowedErrors, resultType, &foundAnyHere);
+
+ if(found) {
+ /*
+ * Note this, even though we may overwrite it later if this
+ * is an Unspecified entry and we find a definitive entry
+ * later
+ */
+ *foundDomain = domain;
+ }
+ if(found && (*resultType != kSecTrustSettingsResultUnspecified)) {
+ trustSettingsDbg("SecTrustSettingsEvaluateCert: found in domain %d", domain);
+ *foundAnyEntry = true;
+ *foundMatchingEntry = true;
+ return errSecSuccess;
+ }
+ foundAny |= foundAnyHere;
+ }
+ trustSettingsDbg("SecTrustSettingsEvaluateCert: NOT FOUND");
+ *foundAnyEntry = foundAny;
+ *foundMatchingEntry = false;
+ return errSecSuccess;
+ END_RCSAPI
+}
+
+/*
+ * Obtain trusted certs which match specified usage.
+ * Only certs with a SecTrustSettingsResult of
+ * kSecTrustSettingsResultTrustRoot or
+ * or kSecTrustSettingsResultTrustAsRoot will be returned.
+ * To be used by SecureTransport for its SSLSetTrustedRoots() call;
+ * I hope nothing else has to use this...
+ * Caller must CFRelease the returned CFArrayRef.
+ */
+OSStatus SecTrustSettingsCopyQualifiedCerts(
+ const CSSM_OID *policyOID,
+ const char *policyString, /* optional */
+ uint32 policyStringLen,
+ SecTrustSettingsKeyUsage keyUsage, /* optional */
+ CFArrayRef *certArray) /* RETURNED */
+{
+ BEGIN_RCSAPI
+
+ /* ensure a NULL_terminated string */
+ auto_array<char> polStr;
+ if(policyString != NULL) {
+ polStr.allocate(policyStringLen + 1);
+ memmove(polStr.get(), policyString, policyStringLen);
+ if(policyString[policyStringLen - 1] != '\0') {
+ (polStr.get())[policyStringLen] = '\0';
+ }
+ }
+
+ return tsCopyCertsCommon(policyOID, polStr.get(), keyUsage,
+ false, /* !onlyRoots */
+ true, true, true, /* all domains */
+ certArray);
+
+ END_RCSAPI
+}
+
+/*
+ * Obtain unrestricted root certs from the specified domain(s).
+ * Only returns roots with no usage constraints.
+ * Caller must CFRelease the returned CFArrayRef.
+ */
+OSStatus SecTrustSettingsCopyUnrestrictedRoots(
+ Boolean user,
+ Boolean admin,
+ Boolean system,
+ CFArrayRef *certArray) /* RETURNED */
+{
+ BEGIN_RCSAPI
+
+ return tsCopyCertsCommon(NULL, NULL, NULL, /* no constraints */
+ true, /* onlyRoots */
+ user, admin, system,
+ certArray);
+
+ END_RCSAPI
+}
+
+static const char hexChars[16] = {
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+};
+
+/*
+ * Obtain a string representing a cert's SHA1 digest. This string is
+ * the key used to look up per-cert trust settings in a TrustSettings record.
+ */
+CFStringRef SecTrustSettingsCertHashStrFromCert(
+ SecCertificateRef certRef)
+{
+ if(certRef == NULL) {
+ return NULL;
+ }
+
+ if(certRef == kSecTrustSettingsDefaultRootCertSetting) {
+ /* use this string instead of the cert hash as the dictionary key */
+ trustSettingsDbg("SecTrustSettingsCertHashStrFromCert: DefaultSetting");
+ return kSecTrustRecordDefaultRootCert;
+ }
+
+ CSSM_DATA certData;
+ OSStatus ortn = SecCertificateGetData(certRef, &certData);
+ if(ortn) {
+ return NULL;
+ }
+ return SecTrustSettingsCertHashStrFromData(certData.Data, certData.Length);
+}
+
+CFStringRef SecTrustSettingsCertHashStrFromData(
+ const void *cert,
+ size_t certLen)
+{
+ unsigned char digest[CC_SHA1_DIGEST_LENGTH];
+ char asciiDigest[(2 * CC_SHA1_DIGEST_LENGTH) + 1];
+ unsigned dex;
+ char *outp = asciiDigest;
+ unsigned char *inp = digest;
+
+ if(cert == NULL) {
+ return NULL;
+ }
+
+ CC_SHA1(cert, (CC_LONG)certLen, digest);
+
+ for(dex=0; dex<CC_SHA1_DIGEST_LENGTH; dex++) {
+ unsigned c = *inp++;
+ outp[1] = hexChars[c & 0xf];
+ c >>= 4;
+ outp[0] = hexChars[c];
+ outp += 2;
+ }
+ *outp = 0;
+ return CFStringCreateWithCString(NULL, asciiDigest, kCFStringEncodingASCII);
+}
+
+/*
+ * Add a cert's TrustSettings to a non-persistent TrustSettings record.
+ * No locking or cache flushing here; it's all local to the TrustSettings
+ * we construct here.
+ */
+OSStatus SecTrustSettingsSetTrustSettingsExternal(
+ CFDataRef settingsIn, /* optional */
+ SecCertificateRef certRef, /* optional */
+ CFTypeRef trustSettingsDictOrArray, /* optional */
+ CFDataRef *settingsOut) /* RETURNED */
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(settingsOut)
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(kSecTrustSettingsDomainMemory, settingsIn, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ if(certRef != NULL) {
+ ts->setTrustSettings(certRef, trustSettingsDictOrArray);
+ }
+ *settingsOut = ts->createExternal();
+ return errSecSuccess;
+
+ END_RCSAPI
+}
+
+#pragma mark --- API functions ---
+
+OSStatus SecTrustSettingsCopyTrustSettings(
+ SecCertificateRef certRef,
+ SecTrustSettingsDomain domain,
+ CFArrayRef *trustSettings) /* RETURNED */
+{
+ TS_REQUIRED(certRef)
+ TS_REQUIRED(trustSettings)
+
+ OSStatus result = tsCopyTrustSettings(certRef, domain, trustSettings, NULL);
+ if (result == errSecSuccess && *trustSettings == NULL) {
+ result = errSecItemNotFound; /* documented result if no trust settings exist */
+ }
+ return result;
+}
+
+OSStatus SecTrustSettingsCopyModificationDate(
+ SecCertificateRef certRef,
+ SecTrustSettingsDomain domain,
+ CFDateRef *modificationDate) /* RETURNED */
+{
+ TS_REQUIRED(certRef)
+ TS_REQUIRED(modificationDate)
+
+ OSStatus result = tsCopyTrustSettings(certRef, domain, NULL, modificationDate);
+ if (result == errSecSuccess && *modificationDate == NULL) {
+ result = errSecItemNotFound; /* documented result if no trust settings exist */
+ }
+ return result;
+}
+
+/* works with existing and with new cert */
+OSStatus SecTrustSettingsSetTrustSettings(
+ SecCertificateRef certRef,
+ SecTrustSettingsDomain domain,
+ CFTypeRef trustSettingsDictOrArray)
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(certRef)
+
+ if(domain == kSecTrustSettingsDomainSystem) {
+ return errSecDataNotModifiable;
+ }
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_YES, TRIM_NO, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ ts->setTrustSettings(certRef, trustSettingsDictOrArray);
+ ts->flushToDisk();
+ tsTrustSettingsChanged();
+ return errSecSuccess;
+
+ END_RCSAPI
+}
+
+OSStatus SecTrustSettingsRemoveTrustSettings(
+ SecCertificateRef cert,
+ SecTrustSettingsDomain domain)
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(cert)
+
+ if(domain == kSecTrustSettingsDomainSystem) {
+ return errSecDataNotModifiable;
+ }
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_NO, TRIM_NO, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ /* deleteTrustSettings throws if record not found */
+ trustSettingsDbg("SecTrustSettingsRemoveTrustSettings: deleting from domain %d",
+ (int)domain);
+ ts->deleteTrustSettings(cert);
+ ts->flushToDisk();
+ tsTrustSettingsChanged();
+ return errSecSuccess;
+
+ END_RCSAPI
+}
+
+/* get all certs listed in specified domain */
+OSStatus SecTrustSettingsCopyCertificates(
+ SecTrustSettingsDomain domain,
+ CFArrayRef *certArray)
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(certArray)
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_NO, TRIM_NO, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ CFMutableArrayRef outArray = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
+
+ /*
+ * Keychains to search: user's search list, System.keychain, system root store,
+ * system intermediates, as appropriate
+ */
+ StorageManager::KeychainList keychains;
+ Keychain adminKc;
+ Keychain sysCertKc;
+ Keychain sysRootKc;
+ switch(domain) {
+ case kSecTrustSettingsDomainUser:
+ /* user search list */
+ globals().storageManager.getSearchList(keychains);
+ /* drop thru to next case */
+ case kSecTrustSettingsDomainAdmin:
+ /* admin certs in system keychain */
+ adminKc = globals().storageManager.make(ADMIN_CERT_STORE_PATH, false);
+ keychains.push_back(adminKc);
+ /* system-wide intermediate certs */
+ sysCertKc = globals().storageManager.make(SYSTEM_CERT_STORE_PATH, false);
+ keychains.push_back(sysCertKc);
+ /* drop thru to next case */
+ case kSecTrustSettingsDomainSystem:
+ /* and, for all cases, immutable system root store */
+ sysRootKc = globals().storageManager.make(SYSTEM_ROOT_STORE_PATH, false);
+ keychains.push_back(sysRootKc);
+ default:
+ /* already validated when we created the TrustSettings */
+ break;
+ }
+ ts->findCerts(keychains, outArray);
+ if(CFArrayGetCount(outArray) == 0) {
+ CFRelease(outArray);
+ return errSecNoTrustSettings;
+ }
+ tsAddConditionalCerts(outArray);
+ *certArray = outArray;
+ END_RCSAPI
+}
+
+/*
+ * Obtain an external, portable representation of the specified
+ * domain's TrustSettings. Caller must CFRelease the returned data.
+ */
+OSStatus SecTrustSettingsCreateExternalRepresentation(
+ SecTrustSettingsDomain domain,
+ CFDataRef *trustSettings)
+{
+ BEGIN_RCSAPI
+
+ TS_REQUIRED(trustSettings)
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, CREATE_NO, TRIM_NO, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ *trustSettings = ts->createExternal();
+ return errSecSuccess;
+
+ END_RCSAPI
+}
+
+/*
+ * Import trust settings, obtained via SecTrustSettingsCreateExternalRepresentation,
+ * into the specified domain.
+ */
+OSStatus SecTrustSettingsImportExternalRepresentation(
+ SecTrustSettingsDomain domain,
+ CFDataRef trustSettings) /* optional - NULL means empty settings */
+{
+ BEGIN_RCSAPI
+
+ if(domain == kSecTrustSettingsDomainSystem) {
+ return errSecDataNotModifiable;
+ }
+
+ OSStatus result;
+ TrustSettings* ts;
+
+ result = TrustSettings::CreateTrustSettings(domain, trustSettings, ts);
+ if (result != errSecSuccess) {
+ return result;
+ }
+
+ auto_ptr<TrustSettings>_(ts);
+
+ ts->flushToDisk();
+ tsTrustSettingsChanged();
+ return errSecSuccess;
+
+ END_RCSAPI
+}
+
projects / apple / security.git / blobdiff