static void serializeAndDeserialize(SecOTRSessionRef* thisOne) { CFMutableDataRef serialized = CFDataCreateMutable(kCFAllocatorDefault, 0); SecOTRSAppendSerialization(*thisOne, serialized); CFReleaseNull(*thisOne); *thisOne = SecOTRSessionCreateFromData(kCFAllocatorDefault, serialized); CFReleaseSafe(serialized); }
SOSCoderRef SOSCoderCreateFromData(CFDataRef exportedData, CFErrorRef *error) { SOSCoderRef p = calloc(1, sizeof(struct __OpaqueSOSCoder)); const uint8_t *der = CFDataGetBytePtr(exportedData); const uint8_t *der_end = der + CFDataGetLength(exportedData); CFDataRef otr_data = NULL; ccder_tag tag; require(ccder_decode_tag(&tag, der, der_end),fail); switch (tag) { case CCDER_OCTET_STRING: // TODO: this code is safe to delete? { der = der_decode_data(kCFAllocatorDefault, 0, &otr_data, error, der, der_end); p->waitingForDataPacket = false; } break; case CCDER_CONSTRUCTED_SEQUENCE: { const uint8_t *sequence_end = NULL; der = ccder_decode_sequence_tl(&sequence_end, der, der_end); require_action_quiet(sequence_end == der_end, fail, SecCFDERCreateError(kSOSErrorDecodeFailure, CFSTR("Extra data in SOS coder"), NULL, error)); der = der_decode_data(kCFAllocatorDefault, 0, &otr_data, error, der, sequence_end); der = der_decode_bool(&p->waitingForDataPacket, der, sequence_end); if (der != sequence_end) { // optionally a pending response der = der_decode_data(kCFAllocatorDefault, 0, &p->pendingResponse, error, der, sequence_end); } } break; default: SecCFDERCreateError(kSOSErrorDecodeFailure, CFSTR("Unsupported SOS Coder DER"), NULL, error); goto fail; } require(der, fail); p->sessRef = SecOTRSessionCreateFromData(NULL, otr_data); require(p->sessRef, fail); CFReleaseSafe(otr_data); return p; fail: SOSCoderDispose(p); CFReleaseSafe(otr_data); return NULL; }
bool _SecOTRSessionProcessPacketRemote(CFDataRef sessionData, CFDataRef inputPacket, CFDataRef* outputSessionData, CFDataRef* outputPacket, bool *readyForMessages, CFErrorRef *error) { SecOTRSessionRef session = SecOTRSessionCreateFromData(kCFAllocatorDefault, sessionData); CFMutableDataRef negotiationResponse = CFDataCreateMutable(kCFAllocatorDefault, 0); if (inputPacket) { SecOTRSProcessPacket(session, inputPacket, negotiationResponse); } else { SecOTRSAppendStartPacket(session, negotiationResponse); } CFMutableDataRef outputSession = CFDataCreateMutable(kCFAllocatorDefault, 0); SecOTRSAppendSerialization(session, outputSession); *outputSessionData = outputSession; *outputPacket = negotiationResponse; *readyForMessages = SecOTRSGetIsReadyForMessages(session); return true; }