+++ /dev/null
-//
-// SOSAccountRingUpdate.c
-// sec
-//
-//
-
-#include <stdio.h>
-
-#include "SOSAccountPriv.h"
-#include <Security/SecureObjectSync/SOSTransportCircle.h>
-#include <Security/SecureObjectSync/SOSTransport.h>
-#include <Security/SecureObjectSync/SOSViews.h>
-#include <Security/SecureObjectSync/SOSRing.h>
-#include <Security/SecureObjectSync/SOSRingUtils.h>
-#include <Security/SecureObjectSync/SOSPeerInfoCollections.h>
-
-#if 0
-static inline bool SOSAccountHasLeft(SOSAccountRef account) {
- switch(account->departure_code) {
- case kSOSWithdrewMembership: /* Fallthrough */
- case kSOSMembershipRevoked: /* Fallthrough */
- case kSOSLeftUntrustedCircle:
- return true;
- case kSOSNeverAppliedToCircle: /* Fallthrough */
- case kSOSNeverLeftCircle: /* Fallthrough */
- default:
- return false;
- }
-}
-#endif
-
-static const char *concordstring[] = {
- "kSOSConcordanceTrusted",
- "kSOSConcordanceGenOld", // kSOSErrorReplay
- "kSOSConcordanceNoUserSig", // kSOSErrorBadSignature
- "kSOSConcordanceNoUserKey", // kSOSErrorNoKey
- "kSOSConcordanceNoPeer", // kSOSErrorPeerNotFound
- "kSOSConcordanceBadUserSig", // kSOSErrorBadSignature
- "kSOSConcordanceBadPeerSig", // kSOSErrorBadSignature
- "kSOSConcordanceNoPeerSig",
- "kSOSConcordanceWeSigned",
- "kSOSConcordanceInvalidMembership",
- "kSOSConcordanceMissingMe",
- "kSOSConcordanceImNotWorthy",
-};
-
-
-static bool SOSAccountIsPeerRetired(SOSAccountRef account, CFSetRef peers){
- CFMutableArrayRef peerIDs = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
- bool result = false;
-
- CFSetForEach(peers, ^(const void *value) {
- SOSPeerInfoRef peer = (SOSPeerInfoRef)value;
- if(SOSPeerInfoIsRetirementTicket(peer))
- CFArrayAppendValue(peerIDs, peer);
- });
- if(CFArrayGetCount(peerIDs) > 0){
- if(!SOSAccountRemoveBackupPeers(account, peerIDs, NULL))
- secerror("Could not remove peers: %@, from the backup", peerIDs);
- else
- return true;
- }
- else
- result = true;
-
- return result;
-}
-
-static bool SOSAccountBackupSliceKeyBagNeedsFix(SOSAccountRef account, SOSBackupSliceKeyBagRef bskb) {
-
- if (SOSBSKBIsDirect(bskb) || account->backup_key == NULL)
- return false;
-
- CFSetRef peers = SOSBSKBGetPeers(bskb);
-
- /* first scan for retired peers, and kick'em out!*/
- SOSAccountIsPeerRetired(account, peers);
-
- SOSPeerInfoRef myPeer = SOSAccountGetMyPeerInfo(account);
- bool needsFix = true;
-
- if (myPeer) {
- SOSPeerInfoRef meInBag = (SOSPeerInfoRef) CFSetGetValue(peers, myPeer);
- CFDataRef myBK = SOSPeerInfoCopyBackupKey(myPeer);
- CFDataRef meInBagBK = SOSPeerInfoCopyBackupKey(meInBag);
- needsFix = !(meInBag && CFEqualSafe(myBK,
- meInBagBK));
- CFReleaseNull(myBK);
- CFReleaseNull(meInBagBK);
- }
-
- return needsFix;
-}
-
-
-bool SOSAccountHandleUpdateRing(SOSAccountRef account, SOSRingRef prospectiveRing, bool writeUpdate, CFErrorRef *error) {
- bool success = true;
- bool haveOldRing = true;
- const char *localRemote = writeUpdate ? "local": "remote";
- SOSFullPeerInfoRef fpi = account->my_identity;
- SOSPeerInfoRef pi = SOSFullPeerInfoGetPeerInfo(fpi);
- CFStringRef peerID = SOSPeerInfoGetPeerID(pi);
- bool neverWrite = !(fpi && pi && peerID && SOSAccountIsInCircle(account, NULL));
-
- secinfo("signing", "start:[%s] %@", localRemote, prospectiveRing);
-
- require_action_quiet(!(writeUpdate && neverWrite), errOut, SOSCreateError(kSOSErrorNotReady, CFSTR("Can't update from local if FullPeerInfo not present"), NULL, error));
-
- require_quiet(SOSAccountHasPublicKey(account, error), errOut);
-
- require_action_quiet(prospectiveRing, errOut,
- SOSCreateError(kSOSErrorIncompatibleCircle, CFSTR("No Ring to work with"), NULL, error));
-
- // We should at least have a sane ring system in the account object
- require_quiet(SOSAccountCheckForRings(account, error), errOut);
-
- CFStringRef ringName = SOSRingGetName(prospectiveRing);
- SOSRingRef oldRing = SOSAccountGetRing(account, ringName, NULL);
-
- SOSTransportCircleRef transport = account->circle_transport;
-
- // SOSAccountScanForRetired(account, prospectiveRing, error);
-
- SOSRingRef newRing = CFRetainSafe(prospectiveRing); // TODO: SOSAccountCloneRingWithRetirement(account, prospectiveRing, error);
-
- typedef enum {
- accept,
- countersign,
- leave,
- revert,
- modify,
- ignore
- } ringAction_t;
-
- static const char *actionstring[] = {
- "accept", "countersign", "leave", "revert", "modify", "ignore",
- };
-
- ringAction_t ringAction = ignore;
- enum DepartureReason leaveReason = kSOSNeverLeftCircle;
-
- bool userTrustedoldRing = true;
-
- SOSCircleRef circle = SOSAccountGetCircle(account, NULL);
- CFSetRef peers = SOSCircleCopyPeers(circle, kCFAllocatorDefault);
-
- SecKeyRef oldKey = account->user_public;
-
-#if 0
- // for now user keys aren't explored.
- // we should ask the ring if it cares about it and then do the magic to find the right user keys.
- SecKeyRef oldKey = account->user_public;
-
- if(SOSRingPKTrusted(oldRing, account->user_public, NULL)) oldKey = account->user_public;
- else if(account->previous_public && SOSRingPKTrusted(oldRing, account->previous_public, NULL)) oldKey = account->previous_public;
- bool userTrustedoldRing = (oldKey != NULL) && haveOldRing;
-
-#endif
-
- if (!oldRing) {
- oldRing = newRing;
- }
-
- SOSConcordanceStatus concstat = SOSRingConcordanceTrust(fpi, peers, oldRing, newRing, oldKey, account->user_public, peerID, error);
- CFReleaseNull(peers);
-
- CFStringRef concStr = NULL;
- switch(concstat) {
- case kSOSConcordanceTrusted:
- ringAction = countersign;
- concStr = CFSTR("Trusted");
- break;
- case kSOSConcordanceGenOld:
- ringAction = userTrustedoldRing ? revert : ignore;
- concStr = CFSTR("Generation Old");
- break;
- case kSOSConcordanceBadUserSig:
- case kSOSConcordanceBadPeerSig:
- ringAction = userTrustedoldRing ? revert : accept;
- concStr = CFSTR("Bad Signature");
- break;
- case kSOSConcordanceNoUserSig:
- ringAction = userTrustedoldRing ? revert : accept;
- concStr = CFSTR("No User Signature");
- break;
- case kSOSConcordanceNoPeerSig:
- ringAction = accept; // We might like this one eventually but don't countersign.
- concStr = CFSTR("No trusted peer signature");
- secerror("##### No trusted peer signature found, accepting hoping for concordance later %@", newRing);
- break;
- case kSOSConcordanceNoPeer:
- ringAction = leave;
- leaveReason = kSOSLeftUntrustedCircle;
- concStr = CFSTR("No trusted peer left");
- break;
- case kSOSConcordanceNoUserKey:
- secerror("##### No User Public Key Available, this shouldn't ever happen!!!");
- ringAction = ignore;
- break;
-
- case kSOSConcordanceMissingMe:
- case kSOSConcordanceImNotWorthy:
- ringAction = modify;
- concStr = CFSTR("Incorrect membership for me");
- break;
- case kSOSConcordanceInvalidMembership:
- ringAction = userTrustedoldRing ? revert : ignore;
- concStr = CFSTR("Invalid Ring Membership");
- break;
- default:
- secerror("##### Bad Error Return from ConcordanceTrust");
- ringAction = ignore;
- break;
- }
-
- secnotice("signing", "Decided on action [%s] based on concordance state [%s] and [%s] circle.", actionstring[ringAction], concordstring[concstat], userTrustedoldRing ? "trusted" : "untrusted");
-
- SOSRingRef ringToPush = NULL;
- bool iWasInOldRing = peerID && SOSRingHasPeerID(oldRing, peerID);
- bool iAmInNewRing = peerID && SOSRingHasPeerID(newRing, peerID);
- bool ringIsBackup = SOSRingGetType(newRing) == kSOSRingBackup;
-
- if (ringIsBackup && !neverWrite) {
- if (ringAction == accept || ringAction == countersign) {
- CFErrorRef localError = NULL;
- SOSBackupSliceKeyBagRef bskb = SOSRingCopyBackupSliceKeyBag(newRing, &localError);
-
- if(!bskb) {
- secnotice("signing", "Backup ring with no backup slice keybag (%@)", localError);
- } else if (SOSAccountBackupSliceKeyBagNeedsFix(account, bskb)) {
- ringAction = modify;
- }
- CFReleaseSafe(localError);
- CFReleaseSafe(bskb);
- }
-
- if (ringAction == modify) {
- CFErrorRef updateError = NULL;
- CFDictionarySetValue(account->trusted_rings, ringName, newRing);
-
- if(SOSAccountUpdateOurPeerInBackup(account, newRing, &updateError)) {
- secdebug("signing", "Modified backup ring to include us");
- } else {
- secerror("Could not add ourselves to the backup: (%@)", updateError);
- }
- CFReleaseSafe(updateError);
-
- // Fall through to normal modify handling.
- }
- }
-
- if (ringAction == modify) {
- ringAction = ignore;
- }
-
- if (ringAction == leave) {
- if (iWasInOldRing) {
- if (sosAccountLeaveRing(account, newRing, error)) {
- ringToPush = newRing;
- } else {
- secnotice("signing", "Can't leave ring %@", oldRing);
- success = false;
- }
- account->departure_code = leaveReason;
- ringAction = accept;
- } else {
- // We are not in this ring, but we need to update account with it, since we got it from cloud
- secnotice("signing", "We are not in this ring, but we need to update account with it");
- ringAction = accept;
- }
- }
-
- if (ringAction == countersign) {
- if (iAmInNewRing) {
- if (SOSRingPeerTrusted(newRing, fpi, NULL)) {
- secinfo("signing", "Already concur with: %@", newRing);
- } else {
- CFErrorRef signingError = NULL;
-
- if (fpi && SOSRingConcordanceSign(newRing, fpi, &signingError)) {
- ringToPush = newRing;
- secinfo("signing", "Concurred with: %@", newRing);
- } else {
- secerror("Failed to concurrence sign, error: %@ Old: %@ New: %@", signingError, oldRing, newRing);
- success = false;
- }
- CFReleaseSafe(signingError);
- }
- } else {
- secnotice("signing", "Not countersigning, not in ring: %@", newRing);
- }
- ringAction = accept;
- }
-
- if (ringAction == accept) {
- if (iWasInOldRing && !iAmInNewRing) {
-
- // Don't destroy evidence of other code determining reason for leaving.
- //if(!SOSAccountHasLeft(account)) account->departure_code = kSOSMembershipRevoked;
- // TODO: LeaveReason for rings
- }
-
- if (pi && SOSRingHasRejection(newRing, peerID)) {
- // TODO: ReasonForLeaving for rings
- SOSRingRemoveRejection(newRing, peerID);
- }
-
- CFRetainSafe(oldRing);
- CFDictionarySetValue(account->trusted_rings, ringName, newRing);
- // TODO: Why was this? SOSAccountSetPreviousPublic(account);
-
- secnotice("signing", "%@, Accepting ring: %@", concStr, newRing);
-
- if (pi && account->user_public_trusted
- && SOSRingHasApplicant(oldRing, peerID)
- && SOSRingCountPeers(newRing) > 0
- && !iAmInNewRing && !SOSRingHasApplicant(newRing, peerID)) {
- // We weren't rejected (above would have set me to NULL.
- // We were applying and we weren't accepted.
- // Our application is declared lost, let us reapply.
-
- if (SOSRingApply(newRing, account->user_public, fpi, NULL))
- writeUpdate = true;
- }
-
- if (pi && SOSRingHasPeerID(oldRing, peerID)) {
- SOSAccountCleanupRetirementTickets(account, RETIREMENT_FINALIZATION_SECONDS, NULL);
- }
-
- CFReleaseNull(oldRing);
-
- account->circle_rings_retirements_need_attention = true;
-
- if (writeUpdate && !neverWrite)
- ringToPush = newRing;
- SOSUpdateKeyInterest();
- }
-
- /*
- * In the revert section we'll guard the KVS idea of circles by rejecting "bad" new rings
- * and pushing our current view of the ring (oldRing). We'll only do this if we actually
- * are a member of oldRing - never for an empty ring.
- */
-
- if (ringAction == revert) {
- if(haveOldRing && !neverWrite && SOSRingHasPeerID(oldRing, peerID)) {
- secnotice("signing", "%@, Rejecting: %@ re-publishing %@", concStr, newRing, oldRing);
- ringToPush = oldRing;
- } else {
- secnotice("canary", "%@, Rejecting: %@ Have no old circle - would reset", concStr, newRing);
- }
- }
-
-
- if (ringToPush != NULL) {
- secnotice("signing", "Pushing:[%s] %@", localRemote, ringToPush);
- CFDataRef ringData = SOSRingCopyEncodedData(ringToPush, error);
- if (ringData) {
- success &= SOSTransportCircleRingPostRing(transport, SOSRingGetName(ringToPush), ringData, error);
- } else {
- success = false;
- }
- CFReleaseNull(ringData);
- }
-
- CFReleaseSafe(newRing);
- return success;
-errOut:
- return false;
-}
projects / apple / security.git / blobdiff