+++ /dev/null
-//
-// SOSRingConcordanceTrust.c
-// sec
-//
-// Created by Richard Murphy on 3/15/15.
-//
-//
-
-#include <AssertMacros.h>
-
-#include <Security/SecureObjectSync/SOSInternal.h>
-#include <Security/SecureObjectSync/SOSPeer.h>
-#include <Security/SecureObjectSync/SOSPeerInfoInternal.h>
-#include <Security/SecureObjectSync/SOSPeerInfoCollections.h>
-#include <Security/SecureObjectSync/SOSCircle.h>
-#include <Security/SecFramework.h>
-
-#include <Security/SecKey.h>
-#include <Security/SecKeyPriv.h>
-#include <CoreFoundation/CoreFoundation.h>
-
-#include <utilities/SecCFWrappers.h>
-
-//#include "ckdUtilities.h"
-
-#include <corecrypto/ccder.h>
-#include <corecrypto/ccdigest.h>
-#include <corecrypto/ccsha2.h>
-
-
-#include <utilities/der_plist.h>
-#include <utilities/der_plist_internal.h>
-#include <corecrypto/ccder.h>
-#include <utilities/der_date.h>
-
-#include <stdlib.h>
-#include <assert.h>
-
-#include "SOSRing.h"
-#include "SOSRingUtils.h"
-
-static inline CFDictionaryRef SOSPeerInfoDictionaryCreate(CFSetRef peers) {
- size_t n = CFSetGetCount(peers);
- SOSPeerInfoRef peerInfos[n];
- CFStringRef peerIDs[n];
- CFSetGetValues(peers, (const void **) peerInfos);
- for(size_t i = 0; i < n; i++) peerIDs[i] = SOSPeerInfoGetPeerID(peerInfos[i]);
- return CFDictionaryCreate(NULL, (const void **)peerIDs, (const void **)peerInfos, n, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
-}
-
-static inline SOSConcordanceStatus CheckPeerStatus(CFStringRef peerID, SOSPeerInfoRef peer, SOSRingRef ring, SecKeyRef userPub, CFErrorRef *error) {
- SOSConcordanceStatus result = kSOSConcordanceNoPeer;
- SecKeyRef pubKey = NULL;
-
- require_action_quiet(peer, exit, result = kSOSConcordanceNoPeer);
- pubKey = SOSPeerInfoCopyPubKey(peer, error);
- require_quiet(pubKey, exit);
- require_action_quiet(SOSRingHasPeerID(ring, peerID), exit, result = kSOSConcordanceNoPeer);
- require_action_quiet(SOSPeerInfoApplicationVerify(peer, userPub, NULL), exit, result = kSOSConcordanceNoPeer);
- require_action_quiet(SOSRingVerifySignatureExists(ring, pubKey, error), exit, result = kSOSConcordanceNoPeerSig);
- require_action_quiet(SOSRingVerify(ring, pubKey, error), exit, result = kSOSConcordanceBadPeerSig);
-
- result = kSOSConcordanceTrusted;
-
-exit:
- CFReleaseNull(pubKey);
- return result;
-}
-
-static inline SOSConcordanceStatus CombineStatus(SOSConcordanceStatus status1, SOSConcordanceStatus status2)
-{
- if (status1 == kSOSConcordanceTrusted || status2 == kSOSConcordanceTrusted)
- return kSOSConcordanceTrusted;
-
- if (status1 == kSOSConcordanceBadPeerSig || status2 == kSOSConcordanceBadPeerSig)
- return kSOSConcordanceBadPeerSig;
-
- if (status1 == kSOSConcordanceNoPeerSig || status2 == kSOSConcordanceNoPeerSig)
- return kSOSConcordanceNoPeerSig;
-
- return status1;
-}
-
-SOSConcordanceStatus GetSignersStatus(CFSetRef peers, SOSRingRef signersRing, SOSRingRef statusRing,
- SecKeyRef userPubkey, CFStringRef excludePeerID, CFErrorRef *error) {
- CFDictionaryRef ringPeerInfos = SOSPeerInfoDictionaryCreate(peers);
- __block SOSConcordanceStatus status = kSOSConcordanceNoPeer;
- SOSRingForEachPeerID(signersRing, ^(CFStringRef peerID) {
- SOSPeerInfoRef pi = (SOSPeerInfoRef) CFDictionaryGetValue(ringPeerInfos, peerID);
- SOSConcordanceStatus peerStatus = CheckPeerStatus(peerID, pi, statusRing, userPubkey, error);
-
- secnotice("ring", "concordance-signer-status: %@ -> %d", peerID, peerStatus);
-
- if (peerStatus == kSOSConcordanceNoPeerSig &&
- (CFEqualSafe(SOSPeerInfoGetPeerID(pi), excludePeerID) || SOSPeerInfoIsCloudIdentity(pi)))
- peerStatus = kSOSConcordanceNoPeer;
-
- status = CombineStatus(status, peerStatus);
- });
-
- return status;
-}
-
-
-SOSConcordanceStatus GetSignersStatus_Transitive(CFSetRef peers, SOSRingRef signersRing, SOSRingRef statusRing,
- SecKeyRef userPubkey, CFStringRef excludePeerID, CFErrorRef *error) {
- __block SOSConcordanceStatus status = kSOSConcordanceNoPeer;
-
- CFSetForEach(peers, ^(const void *value) {
- SOSPeerInfoRef pi = (SOSPeerInfoRef) value;
- CFStringRef peerID = SOSPeerInfoGetPeerID(pi);
- if(SOSRingHasPeerWithID(statusRing, peerID, NULL)) {
- SOSConcordanceStatus peerStatus = CheckPeerStatus(peerID, pi, statusRing, userPubkey, error);
-
- if (peerStatus == kSOSConcordanceNoPeerSig &&
- (CFEqualSafe(SOSPeerInfoGetPeerID(pi), excludePeerID) || SOSPeerInfoIsCloudIdentity(pi)))
- peerStatus = kSOSConcordanceNoPeer;
-
- status = CombineStatus(status, peerStatus);
- }
- });
-
- return status;
-}
-
-
-SOSConcordanceStatus SOSRingUserKeyConcordanceTrust(SOSFullPeerInfoRef me, CFSetRef peers, SOSRingRef knownRing, SOSRingRef proposedRing,
- SecKeyRef knownPubkey, SecKeyRef userPubkey,
- CFStringRef excludePeerID, CFErrorRef *error) {
- if(userPubkey == NULL) {
- SOSCreateError(kSOSErrorPublicKeyAbsent, CFSTR("Concordance with no public key"), NULL, error);
- return kSOSConcordanceNoUserKey;
- }
-
- if (SOSRingIsEmpty_Internal(proposedRing)) {
- return kSOSConcordanceTrusted;
- }
-
- if(!SOSRingVerifySignatureExists(proposedRing, userPubkey, error)) {
- SOSCreateError(kSOSErrorBadSignature, CFSTR("No public signature"), (error != NULL) ? *error : NULL, error);
- return kSOSConcordanceNoUserSig;
- }
-
- if(!SOSRingVerify(proposedRing, userPubkey, error)) {
- SOSCreateError(kSOSErrorBadSignature, CFSTR("Bad public signature"), (error != NULL) ? *error : NULL, error);
- return kSOSConcordanceBadUserSig;
- }
-
- if (SOSRingIsEmpty_Internal(knownRing) || SOSRingIsOffering_Internal(proposedRing)) {
- return GetSignersStatus(peers, proposedRing, proposedRing, userPubkey, NULL, error);
- }
-
- if(SOSRingIsOlderGeneration(proposedRing, knownRing)) {
- SOSCreateError(kSOSErrorReplay, CFSTR("Bad generation"), NULL, error);
- return kSOSConcordanceGenOld;
- }
-
- if(knownPubkey == NULL) knownPubkey = userPubkey;
- if(!SOSRingVerify(knownRing, knownPubkey, error)) knownPubkey = userPubkey;
- return GetSignersStatus(peers, knownRing, proposedRing, knownPubkey, CFSTR("novalue"), error);
-}
-
-
-SOSConcordanceStatus SOSRingPeerKeyConcordanceTrust(SOSFullPeerInfoRef me, CFSetRef peers, SOSRingRef knownRing, SOSRingRef proposedRing,
- __unused SecKeyRef knownPubkey, SecKeyRef userPubkey,
- CFStringRef excludePeerID, CFErrorRef *error) {
- if(userPubkey == NULL) {
- SOSCreateError(kSOSErrorPublicKeyAbsent, CFSTR("Concordance with no public key - need to validate application"), NULL, error);
- return kSOSConcordanceNoUserKey;
- }
-
- if (SOSRingIsEmpty_Internal(proposedRing)) {
- secnotice("ring", "ring empty -> trusted");
- return kSOSConcordanceTrusted;
- }
-
- if (SOSRingIsEmpty_Internal(knownRing) || SOSRingIsOffering_Internal(proposedRing)) {
- return GetSignersStatus(peers, proposedRing, proposedRing, userPubkey, NULL, error);
- }
-
- if(SOSRingIsOlderGeneration(proposedRing, knownRing)) {
- SOSCreateError(kSOSErrorReplay, CFSTR("Bad generation"), NULL, error);
- return kSOSConcordanceGenOld;
- }
- return GetSignersStatus(peers, knownRing, proposedRing, userPubkey, excludePeerID, error);
-}