SOSAccountUpdate.m   [plain text]

//
// SOSAccountUpdate.c
// sec
//

#include "SOSAccountPriv.h"
#include "SOSAccountLog.h"

#include "keychain/SecureObjectSync/SOSTransportCircleKVS.h"
#include "keychain/SecureObjectSync/SOSTransport.h"
#include <Security/SecureObjectSync/SOSViews.h>
#include "keychain/SecureObjectSync/SOSPeerInfoCollections.h"
#include "keychain/SecureObjectSync/SOSPeerInfoPriv.h"
#include "keychain/SecureObjectSync/SOSPeerInfoV2.h"
#include "keychain/SecureObjectSync/SOSPeerInfoDER.h"
#include <Security/SecureObjectSync/SOSBackupSliceKeyBag.h>
#import "keychain/SecureObjectSync/SOSAccountGhost.h"

#import "keychain/SecureObjectSync/SOSAccountTrust.h"
#import "keychain/SecureObjectSync/SOSAccountTrustClassic+Circle.h"
#import "keychain/SecureObjectSync/SOSAccountTrustClassic+Expansion.h"

static void DifferenceAndCall(CFSetRef old_members, CFSetRef new_members, void (^updatedCircle)(CFSetRef additions, CFSetRef removals))
{
CFMutableSetRef additions = CFSetCreateMutableCopy(kCFAllocatorDefault, 0, new_members);
CFMutableSetRef removals = CFSetCreateMutableCopy(kCFAllocatorDefault, 0, old_members);

CFSetForEach(old_members, ^(const void * value) {
CFSetRemoveValue(additions, value);
});

CFSetForEach(new_members, ^(const void * value) {
CFSetRemoveValue(removals, value);
});

updatedCircle(additions, removals);

CFReleaseSafe(additions);
CFReleaseSafe(removals);
}
static CFMutableSetRef SOSAccountCopyIntersectedViews(CFSetRef peerViews, CFSetRef myViews) {
__block CFMutableSetRef views = CFSetCreateMutable(NULL, 0, &kCFTypeSetCallBacks);
if (peerViews && myViews) CFSetForEach(peerViews, ^(const void *view) {
if (CFSetContainsValue(myViews, view)) {
CFSetAddValue(views, view);
}
});
return views;
}

static inline bool isSyncing(SOSPeerInfoRef peer, SecKeyRef upub) {
if(!SOSPeerInfoApplicationVerify(peer, upub, NULL)) return false;
if(SOSPeerInfoIsRetirementTicket(peer)) return false;
return true;
}

static bool isBackupSOSRing(SOSRingRef ring)
{
return isSOSRing(ring) && (kSOSRingBackup == SOSRingGetType(ring));
}

static void SOSAccountAppendPeerMetasForViewBackups(SOSAccount* account, CFSetRef views, CFMutableArrayRef appendTo)
{
CFMutableDictionaryRef ringToViewTable = NULL;

if([account getCircleStatus:NULL] != kSOSCCInCircle)
return;

if(!(SOSAccountHasCompletedInitialSync(account))){
secnotice("backup", "Haven't finished initial backup syncing, not registering backup metas with engine");
return;
}
if(!SOSPeerInfoV2DictionaryHasData(account.peerInfo, sBackupKeyKey)){
secnotice("backup", "No key to backup to, we don't enable individual view backups");
return;
}
ringToViewTable = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);

CFSetForEach(views, ^(const void *value) {
CFStringRef viewName = value;
if (isString(viewName) && !CFEqualSafe(viewName, kSOSViewKeychainV0)) {
CFStringRef ringName = SOSBackupCopyRingNameForView(viewName);
viewName = ringName;
SOSRingRef ring = [account.trust copyRing:ringName err:NULL];
if (ring && isBackupSOSRing(ring)) {
CFTypeRef currentValue = (CFTypeRef) CFDictionaryGetValue(ringToViewTable, ring);

if (isSet(currentValue)) {
CFSetAddValue((CFMutableSetRef)currentValue, viewName);
} else {
CFMutableSetRef viewNameSet = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
CFSetAddValue(viewNameSet, viewName);

CFDictionarySetValue(ringToViewTable, ring, viewNameSet);
CFReleaseNull(viewNameSet);
}
} else {
secwarning("View '%@' not being backed up – ring %@:%@ not backup ring.", viewName, ringName, ring);
}
CFReleaseNull(ringName);
CFReleaseNull(ring);
}
});

CFDictionaryForEach(ringToViewTable, ^(const void *key, const void *value) {
SOSRingRef ring = (SOSRingRef) key;
CFSetRef viewNames = asSet(value, NULL);
if (isSOSRing(ring) && viewNames) {
if (SOSAccountIntersectsWithOutstanding(account, viewNames)) {
CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
secnotice("engine-notify", "Not ready, no peer meta: R: %@ Vs: %@", SOSRingGetName(ring), ringViews);
});
} else {
bool meta_added = false;
CFErrorRef create_error = NULL;
SOSBackupSliceKeyBagRef key_bag = NULL;
SOSPeerMetaRef newMeta = NULL;

CFDataRef ring_payload = SOSRingGetPayload(ring, NULL);
require_quiet(isData(ring_payload), skip);

key_bag = SOSBackupSliceKeyBagCreateFromData(kCFAllocatorDefault, ring_payload, &create_error);
require_quiet(key_bag, skip);

newMeta = SOSPeerMetaCreateWithComponents(SOSRingGetName(ring), viewNames, ring_payload);
require_quiet(SecAllocationError(newMeta, &create_error, CFSTR("Didn't make peer meta for: %@"), ring), skip);
CFArrayAppendValue(appendTo, newMeta);

CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
secnotice("engine-notify", "Backup peer meta: R: %@ Vs: %@ VD: %@", SOSRingGetName(ring), ringViews, ring_payload);
});

meta_added = true;

skip:
if (!meta_added) {
CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
secerror("Failed to register backup meta from %@ for views %@. Error (%@)", ring, ringViews, create_error);
});
}
CFReleaseNull(newMeta);
CFReleaseNull(key_bag);
CFReleaseNull(create_error);
}
}
});

CFReleaseNull(ringToViewTable);
}

bool SOSAccountSyncingV0(SOSAccount* account) {
__block bool syncingV0 = false;
SOSAccountForEachCirclePeerExceptMe(account, ^(SOSPeerInfoRef peer) {
if (SOSPeerInfoIsEnabledView(peer, kSOSViewKeychainV0)) {
syncingV0 = true;
}
});

return syncingV0;
}

void SOSAccountNotifyEngines(SOSAccount* account)
{
SOSAccountTrustClassic *trust = account.trust;
SOSFullPeerInfoRef identity = trust.fullPeerInfo;
SOSCircleRef circle = trust.trustedCircle;

SOSPeerInfoRef myPi = SOSFullPeerInfoGetPeerInfo(identity);
CFStringRef myPi_id = SOSPeerInfoGetPeerID(myPi);
CFMutableArrayRef syncing_peer_metas = NULL;
CFMutableArrayRef zombie_peer_metas = NULL;
CFErrorRef localError = NULL;
SOSPeerMetaRef myMeta = NULL;

if (myPi_id && isSyncing(myPi, account.accountKey) && SOSCircleHasPeer(circle, myPi, NULL)) {
CFMutableSetRef myViews = SOSPeerInfoCopyEnabledViews(myPi);

// We add V0 views to everyone if we see a V0 peer, or a peer with the view explicity enabled
// V2 peers shouldn't be explicity enabling the uber V0 view, though the seeds did.
__block bool addV0Views = SOSAccountSyncingV0(account);

syncing_peer_metas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
zombie_peer_metas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
SOSAccountForEachCirclePeerExceptMe(account, ^(SOSPeerInfoRef peer) {
CFMutableArrayRef arrayToAddTo = isSyncing(peer, account.accountKey) ? syncing_peer_metas : zombie_peer_metas;

// Compute views each peer is in that we are also in ourselves
CFMutableSetRef peerEnabledViews = SOSPeerInfoCopyEnabledViews(peer);
CFMutableSetRef views = SOSAccountCopyIntersectedViews(peerEnabledViews, myViews);
CFReleaseNull(peerEnabledViews);

if(addV0Views) {
CFSetAddValue(views, kSOSViewKeychainV0);
}

CFStringSetPerformWithDescription(views, ^(CFStringRef viewsDescription) {
secnotice("engine-notify", "Meta: %@: %@", SOSPeerInfoGetPeerID(peer), viewsDescription);
});

SOSPeerMetaRef peerMeta = SOSPeerMetaCreateWithComponents(SOSPeerInfoGetPeerID(peer), views, NULL);
CFReleaseNull(views);

CFArrayAppendValue(arrayToAddTo, peerMeta);
CFReleaseNull(peerMeta);
});

// We don't make a backup peer meta for the magic V0 peer
// Set up all the rest before we munge the set
SOSAccountAppendPeerMetasForViewBackups(account, myViews, syncing_peer_metas);

// If we saw someone else needing V0, we sync V0, too!
if (addV0Views) {
CFSetAddValue(myViews, kSOSViewKeychainV0);
}

CFStringSetPerformWithDescription(myViews, ^(CFStringRef viewsDescription) {
secnotice("engine-notify", "My Meta: %@: %@", myPi_id, viewsDescription);
});
myMeta = SOSPeerMetaCreateWithComponents(myPi_id, myViews, NULL);
CFReleaseSafe(myViews);
}

SOSEngineRef engine = SOSDataSourceFactoryGetEngineForDataSourceName(account.factory, SOSCircleGetName(circle), NULL);
if (engine) {
SOSEngineCircleChanged(engine, myMeta, syncing_peer_metas, zombie_peer_metas);
}

CFReleaseNull(myMeta);
CFReleaseSafe(localError);

CFReleaseNull(syncing_peer_metas);
CFReleaseNull(zombie_peer_metas);
}

// Upcoming call to View Changes Here
void SOSAccountNotifyOfChange(SOSAccount* account, SOSCircleRef oldCircle, SOSCircleRef newCircle)
{
account.circle_rings_retirements_need_attention = true;

CFMutableSetRef old_members = SOSCircleCopyPeers(oldCircle, kCFAllocatorDefault);
CFMutableSetRef new_members = SOSCircleCopyPeers(newCircle, kCFAllocatorDefault);

CFMutableSetRef old_applicants = SOSCircleCopyApplicants(oldCircle, kCFAllocatorDefault);
CFMutableSetRef new_applicants = SOSCircleCopyApplicants(newCircle, kCFAllocatorDefault);

SOSPeerInfoRef me = account.peerInfo;
if(me && CFSetContainsValue(new_members, me))
SOSAccountSetValue(account, kSOSEscrowRecord, kCFNull, NULL); //removing the escrow records from the account object

DifferenceAndCall(old_members, new_members, ^(CFSetRef added_members, CFSetRef removed_members) {
DifferenceAndCall(old_applicants, new_applicants, ^(CFSetRef added_applicants, CFSetRef removed_applicants) {
CFArrayForEach((__bridge CFArrayRef)(account.change_blocks), ^(const void * notificationBlock) {
secnotice("updates", "calling change block");
((__bridge SOSAccountCircleMembershipChangeBlock) notificationBlock)(account, newCircle, added_members, removed_members, added_applicants, removed_applicants);
});
});
});

CFReleaseNull(old_applicants);
CFReleaseNull(new_applicants);

CFReleaseNull(old_members);
CFReleaseNull(new_members);
}

CF_RETURNS_RETAINED
CFDictionaryRef SOSAccountHandleRetirementMessages(SOSAccount* account, CFDictionaryRef circle_retirement_messages, CFErrorRef *error) {
SOSAccountTrustClassic* trust = account.trust;
CFStringRef circle_name = SOSCircleGetName(trust.trustedCircle);
CFMutableArrayRef handledRetirementIDs = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
// We only handle one circle, look it up:

if(!trust.trustedCircle) // We don't fail, we intentionally handle nothing.
return CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL);

CFDictionaryRef retirement_dictionary = asDictionary(CFDictionaryGetValue(circle_retirement_messages, circle_name), NULL);
if(!retirement_dictionary)
return CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL);

CFDictionaryForEach(retirement_dictionary, ^(const void *key, const void *value) {
if(isData(value)) {
SOSPeerInfoRef pi = SOSPeerInfoCreateFromData(NULL, error, (CFDataRef) value);
if(pi && CFEqual(key, SOSPeerInfoGetPeerID(pi)) && SOSPeerInfoInspectRetirementTicket(pi, error)) {
[trust.retirees addObject: (__bridge id _Nonnull)(pi)];

account.circle_rings_retirements_need_attention = true; // Have to handle retirements.

CFArrayAppendValue(handledRetirementIDs, key);
}
CFReleaseNull(pi);
}
});

// If we are in the retiree list, we somehow got resurrected
// clearly we took care of proper departure before so leave
// and delcare that we withdrew this time.
SOSPeerInfoRef me = account.peerInfo;

if (me && [trust.retirees containsObject:(__bridge id _Nonnull)(me)]) {
SOSAccountPurgeIdentity(account);
trust.departureCode = kSOSDiscoveredRetirement;
}

CFDictionaryRef result = (CFArrayGetCount(handledRetirementIDs) == 0) ? CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL)
: CFDictionaryCreateForCFTypes(kCFAllocatorDefault, circle_name, handledRetirementIDs, NULL);

CFReleaseNull(handledRetirementIDs);
return result;
}

static SOSCircleRef SOSAccountCreateCircleFrom(CFStringRef circleName, CFTypeRef value, CFErrorRef *error) {
if (value && !isData(value) && !isNull(value)) {
secnotice("circleOps", "Value provided not appropriate for a circle");
CFStringRef description = CFCopyTypeIDDescription(CFGetTypeID(value));
SOSCreateErrorWithFormat(kSOSErrorUnexpectedType, NULL, error, NULL,
CFSTR("Expected data or NULL got %@"), description);
CFReleaseSafe(description);
return NULL;
}

SOSCircleRef circle = NULL;
if (!value || isNull(value)) {
secnotice("circleOps", "No circle found in data: %@", value);
circle = NULL;
} else {
circle = SOSCircleCreateFromData(NULL, (CFDataRef) value, error);
if (circle) {
CFStringRef name = SOSCircleGetName(circle);
if (!CFEqualSafe(name, circleName)) {
secnotice("circleOps", "Expected circle named %@, got %@", circleName, name);
SOSCreateErrorWithFormat(kSOSErrorNameMismatch, NULL, error, NULL,
CFSTR("Expected circle named %@, got %@"), circleName, name);
CFReleaseNull(circle);
}
} else {
secnotice("circleOps", "SOSCircleCreateFromData returned NULL.");
}
}
return circle;
}

bool SOSAccountHandleCircleMessage(SOSAccount* account,
CFStringRef circleName, CFDataRef encodedCircleMessage, CFErrorRef *error) {
bool success = false;
CFErrorRef localError = NULL;
SOSCircleRef circle = SOSAccountCreateCircleFrom(circleName, encodedCircleMessage, &localError);
if (circle) {
success = [account.trust updateCircleFromRemote:account.circle_transport newCircle:circle err:&localError];
CFReleaseSafe(circle);
} else {
secerror("NULL circle found, ignoring ...");
success = true; // don't pend this NULL thing.
}

if (!success) {
if (isSOSErrorCoded(localError, kSOSErrorIncompatibleCircle)) {
secerror("Incompatible circle found, abandoning membership: %@", circleName);
}

if (error) {
*error = localError;
localError = NULL;
}

}

CFReleaseNull(localError);

return success;
}

bool SOSAccountHandleParametersChange(SOSAccount* account, CFDataRef parameters, CFErrorRef *error){

SecKeyRef newKey = NULL;
CFDataRef newParameters = NULL;
bool success = false;

if(SOSAccountRetrieveCloudParameters(account, &newKey, parameters, &newParameters, error)) {
debugDumpUserParameters(CFSTR("SOSAccountHandleParametersChange got new user key parameters:"), parameters);
secnotice("circleOps", "SOSAccountHandleParametersChange got new public key: %@", newKey);

if (CFEqualSafe(account.accountKey, newKey)) {
secnotice("circleOps", "Got same public key sent our way. Ignoring.");
success = true;
} else if (CFEqualSafe(account.previousAccountKey, newKey)) {
secnotice("circleOps", "Got previous public key repeated. Ignoring.");
success = true;
} else {
SOSAccountSetUnTrustedUserPublicKey(account, newKey);
CFReleaseNull(newKey);
SOSAccountSetParameters(account, newParameters);

if(SOSAccountRetryUserCredentials(account)) {
secnotice("circleOps", "Successfully used cached password with new parameters");
SOSAccountGenerationSignatureUpdate(account, error);
} else {
secnotice("circleOps", "Got new parameters for public key - could not find or use cached password");
SOSAccountPurgePrivateCredential(account);
}
secnotice("circleop", "Setting account.key_interests_need_updating to true in SOSAccountHandleParametersChange");
account.circle_rings_retirements_need_attention = true;
account.key_interests_need_updating = true;

success = true;
}
}

CFReleaseNull(newKey);
CFReleaseNull(newParameters);

return success;
}