#include <AssertMacros.h>
#include <SecureObjectSync/SOSFullPeerInfo.h>
#include <SecureObjectSync/SOSCircle.h>
#include <SecureObjectSync/SOSInternal.h>
#include <Security/SecKeyPriv.h>
#include <Security/SecItemPriv.h>
#include <Security/SecOTR.h>
#include <CoreFoundation/CFArray.h>
#include <dispatch/dispatch.h>
#include <stdlib.h>
#include <assert.h>
#include <utilities/SecCFWrappers.h>
#include <utilities/SecCFRelease.h>
#include <utilities/der_plist.h>
#include <utilities/der_plist_internal.h>
#include <corecrypto/ccder.h>
#include <CommonCrypto/CommonDigest.h>
#include <CommonCrypto/CommonDigestSPI.h>
#include <CoreFoundation/CoreFoundation.h>
#include "utilities/iOSforOSX.h"
#include <AssertMacros.h>
#include <utilities/SecCFError.h>
#ifdef __cplusplus
extern "C" {
#endif
extern OSStatus SecKeyCopyPublicBytes(SecKeyRef key, CFDataRef* publicBytes);
extern SecKeyRef SecKeyCreatePublicFromPrivate(SecKeyRef privateKey);
#ifdef __cplusplus
}
#endif
struct __OpaqueSOSFullPeerInfo {
CFRuntimeBase _base;
SOSPeerInfoRef peer_info;
CFDataRef key_ref;
};
CFGiblisWithHashFor(SOSFullPeerInfo);
static CFStringRef sPublicKeyKey = CFSTR("PublicSigningKey");
static CFStringRef sNameKey = CFSTR("DeviceName");
static CFStringRef sVersionKey = CFSTR("ConflictVersion");
CFStringRef kSOSFullPeerInfoDescriptionKey = CFSTR("SOSFullPeerInfoDescription");
CFStringRef kSOSFullPeerInfoSignatureKey = CFSTR("SOSFullPeerInfoSignature");
CFStringRef kSOSFullPeerInfoNameKey = CFSTR("SOSFullPeerInfoName");
SOSFullPeerInfoRef SOSFullPeerInfoCreate(CFAllocatorRef allocator, CFDictionaryRef gestalt, SecKeyRef signingKey, CFErrorRef* error) {
SOSFullPeerInfoRef fpi = CFTypeAllocate(SOSFullPeerInfo, struct __OpaqueSOSFullPeerInfo, allocator);
fpi->peer_info = SOSPeerInfoCreate(allocator, gestalt, signingKey, error);
if (fpi->peer_info == NULL) {
CFReleaseNull(fpi);
goto exit;
}
OSStatus result = SecKeyCopyPersistentRef(signingKey, &fpi->key_ref);
if (result != errSecSuccess) {
CFReleaseNull(fpi);
goto exit;
}
exit:
return fpi;
}
SOSFullPeerInfoRef SOSFullPeerInfoCreateCloudIdentity(CFAllocatorRef allocator, SOSPeerInfoRef peer, CFErrorRef* error) {
SOSFullPeerInfoRef fpi = CFTypeAllocate(SOSFullPeerInfo, struct __OpaqueSOSFullPeerInfo, allocator);
SecKeyRef pubKey = NULL;
fpi->peer_info = peer;
CFRetainSafe(fpi->peer_info);
if (fpi->peer_info == NULL) {
CFReleaseNull(fpi);
goto exit;
}
pubKey = SOSPeerInfoCopyPubKey(peer);
fpi->key_ref = SecKeyCreatePersistentRefToMatchingPrivateKey(pubKey, error);
if (fpi->key_ref == NULL) {
CFReleaseNull(fpi);
goto exit;
}
exit:
CFReleaseNull(pubKey);
return fpi;
}
SOSFullPeerInfoRef SOSFullPeerInfoCreateFromDER(CFAllocatorRef allocator, CFErrorRef* error,
const uint8_t** der_p, const uint8_t *der_end) {
SOSFullPeerInfoRef fpi = CFTypeAllocate(SOSFullPeerInfo, struct __OpaqueSOSFullPeerInfo, allocator);
const uint8_t *sequence_end;
*der_p = ccder_decode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, &sequence_end, *der_p, der_end);
fpi->peer_info = SOSPeerInfoCreateFromDER(allocator, error, der_p, der_end);
require_quiet(fpi->peer_info != NULL, fail);
*der_p = der_decode_data(allocator, kCFPropertyListImmutable, &fpi->key_ref, error, *der_p, sequence_end);
require_quiet(*der_p != NULL, fail);
return fpi;
fail:
CFReleaseNull(fpi);
return NULL;
}
SOSFullPeerInfoRef SOSFullPeerInfoCreateFromData(CFAllocatorRef allocator, CFDataRef fullPeerData, CFErrorRef *error)
{
size_t size = CFDataGetLength(fullPeerData);
const uint8_t *der = CFDataGetBytePtr(fullPeerData);
SOSFullPeerInfoRef inflated = SOSFullPeerInfoCreateFromDER(allocator, error, &der, der + size);
return inflated;
}
static void SOSFullPeerInfoDestroy(CFTypeRef aObj) {
SOSFullPeerInfoRef fpi = (SOSFullPeerInfoRef) aObj;
CFReleaseNull(fpi->peer_info);
CFReleaseNull(fpi->key_ref);
}
static Boolean SOSFullPeerInfoCompare(CFTypeRef lhs, CFTypeRef rhs) {
SOSFullPeerInfoRef lpeer = (SOSFullPeerInfoRef) lhs;
SOSFullPeerInfoRef rpeer = (SOSFullPeerInfoRef) rhs;
if (!CFEqual(lpeer->peer_info, rpeer->peer_info))
return false;
if (CFEqual(lpeer->key_ref, rpeer->key_ref))
return true;
SecKeyRef lpk = SOSFullPeerInfoCopyDeviceKey(lpeer, NULL);
SecKeyRef rpk = SOSFullPeerInfoCopyDeviceKey(rpeer, NULL);
bool match = lpk && rpk && CFEqual(lpk, rpk);
CFReleaseNull(lpk);
CFReleaseNull(rpk);
return match;
}
static CFHashCode SOSFullPeerInfoHash(CFTypeRef cf) {
SOSFullPeerInfoRef peer = (SOSFullPeerInfoRef) cf;
return CFHash(peer->peer_info);
}
static CFStringRef SOSFullPeerInfoCopyDescription(CFTypeRef aObj) {
SOSFullPeerInfoRef fpi = (SOSFullPeerInfoRef) aObj;
return CFStringCreateWithFormat(NULL, NULL, CFSTR("<SOSFullPeerInfo@%p: \"%@\">"), fpi, fpi->peer_info);
}
bool SOSFullPeerInfoUpdateGestalt(SOSFullPeerInfoRef peer, CFDictionaryRef gestalt, CFErrorRef* error)
{
SecKeyRef device_key = SOSFullPeerInfoCopyDeviceKey(peer, error);
require_quiet(device_key, fail);
SOSPeerInfoRef newPeer = SOSPeerInfoCopyWithGestaltUpdate(kCFAllocatorDefault, peer->peer_info,
gestalt, device_key, error);
require_quiet(newPeer, fail);
CFReleaseNull(peer->peer_info);
peer->peer_info = newPeer;
newPeer = NULL;
CFReleaseNull(device_key);
return true;
fail:
CFReleaseNull(device_key);
return false;
}
bool SOSFullPeerInfoValidate(SOSFullPeerInfoRef peer, CFErrorRef* error) {
return true;
}
bool SOSFullPeerInfoPurgePersistentKey(SOSFullPeerInfoRef fullPeer, CFErrorRef* error) {
CFDictionaryRef query = CFDictionaryCreateForCFTypes(kCFAllocatorDefault,
kSecValuePersistentRef, fullPeer->key_ref,
kSecUseTombstones, kCFBooleanFalse,
NULL);
SecItemDelete(query);
CFReleaseNull(query);
return true;
}
SOSPeerInfoRef SOSFullPeerInfoGetPeerInfo(SOSFullPeerInfoRef fullPeer)
{
return fullPeer?fullPeer->peer_info:NULL;
}
SecKeyRef SOSFullPeerInfoCopyDeviceKey(SOSFullPeerInfoRef fullPeer, CFErrorRef* error)
{
SecKeyRef device_key = NULL;
require(fullPeer->key_ref, fail);
OSStatus result = SecKeyFindWithPersistentRef(fullPeer->key_ref, &device_key);
require_action_quiet(result == errSecSuccess, fail, SecError(result, error, CFSTR("Finding Persistent Ref")));
return device_key;
fail:
CFReleaseNull(device_key);
return NULL;
}
size_t SOSFullPeerInfoGetDEREncodedSize(SOSFullPeerInfoRef peer, CFErrorRef *error)
{
size_t peer_size = SOSPeerInfoGetDEREncodedSize(peer->peer_info, error);
if (peer_size == 0)
return 0;
size_t ref_size = der_sizeof_data(peer->key_ref, error);
if (ref_size == 0)
return 0;
return ccder_sizeof(CCDER_CONSTRUCTED_SEQUENCE,
peer_size + ref_size);
}
uint8_t* SOSFullPeerInfoEncodeToDER(SOSFullPeerInfoRef peer, CFErrorRef* error, const uint8_t* der, uint8_t* der_end)
{
return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, der_end, der,
SOSPeerInfoEncodeToDER(peer->peer_info, error, der,
der_encode_data(peer->key_ref, error, der, der_end)));
}
CFDataRef SOSFullPeerInfoCopyEncodedData(SOSFullPeerInfoRef peer, CFAllocatorRef allocator, CFErrorRef *error)
{
size_t size = SOSFullPeerInfoGetDEREncodedSize(peer, error);
if (size == 0)
return NULL;
uint8_t buffer[size];
uint8_t* start = SOSFullPeerInfoEncodeToDER(peer, error, buffer, buffer + sizeof(buffer));
CFDataRef result = CFDataCreate(kCFAllocatorDefault, start, size);
return result;
}
bool SOSFullPeerInfoPromoteToApplication(SOSFullPeerInfoRef fpi, SecKeyRef user_key, CFErrorRef *error)
{
bool success = false;
SOSPeerInfoRef old_pi = NULL;
SecKeyRef device_key = SOSFullPeerInfoCopyDeviceKey(fpi, error);
require_quiet(device_key, exit);
old_pi = fpi->peer_info;
fpi->peer_info = SOSPeerInfoCopyAsApplication(old_pi, user_key, device_key, error);
require_action_quiet(fpi->peer_info, exit, fpi->peer_info = old_pi; old_pi = NULL);
success = true;
exit:
CFReleaseSafe(old_pi);
CFReleaseSafe(device_key);
return success;
}
bool SOSFullPeerInfoUpgradeSignatures(SOSFullPeerInfoRef fpi, SecKeyRef user_key, CFErrorRef *error)
{
bool success = false;
SOSPeerInfoRef old_pi = NULL;
SecKeyRef device_key = SOSFullPeerInfoCopyDeviceKey(fpi, error);
require_quiet(device_key, exit);
old_pi = fpi->peer_info;
fpi->peer_info = SOSPeerInfoUpgradeSignatures(NULL, user_key, device_key, old_pi, error);
require_action_quiet(fpi->peer_info, exit, fpi->peer_info = old_pi; old_pi = NULL);
success = true;
exit:
CFReleaseSafe(old_pi);
CFReleaseSafe(device_key);
return success;
}
SOSPeerInfoRef SOSFullPeerInfoPromoteToRetiredAndCopy(SOSFullPeerInfoRef fpi, CFErrorRef *error)
{
SOSPeerInfoRef peer_to_free = NULL;
SOSPeerInfoRef retired_peer = NULL;
SecKeyRef key = SOSFullPeerInfoCopyDeviceKey(fpi, error);
require_quiet(key, error_out);
retired_peer = SOSPeerInfoCreateRetirementTicket(NULL, key, fpi->peer_info, error);
require_quiet(retired_peer, error_out);
peer_to_free = fpi->peer_info;
fpi->peer_info = retired_peer;
CFRetainSafe(fpi->peer_info);
error_out:
CFReleaseNull(key);
CFReleaseNull(peer_to_free);
return retired_peer;
}