static uint8_t* der_encode_cloud_parameters(SecKeyRef publicKey, CFDataRef paramters, CFErrorRef* error,
const uint8_t* der, uint8_t* der_end)
{
uint8_t* original_der_end = der_end;
return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, original_der_end, der,
der_encode_public_bytes(publicKey, error, der,
der_encode_data_or_null(paramters, error, der, der_end)));
}
static uint8_t *der_encode_pbkdf2_params(size_t saltLen, const uint8_t *salt,
unsigned long iterationCount,
unsigned long keyLength,
const uint8_t *der, uint8_t *der_end)
{
uint8_t* original_der_end = der_end;
return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, original_der_end, der,
ccder_encode_raw_octet_string(saltLen, salt, der,
ccder_encode_uint64(iterationCount, der,
ccder_encode_uint64(keyLength, der,
der_encode_SecAsn1Oid(&CSSMOID_PKCS5_HMAC_SHA1, der, der_end)))));
}
static uint8_t* SOSCoderEncodeToDER(SOSCoderRef coder, CFErrorRef* error, const uint8_t* der, uint8_t* der_end) {
if(!der_end) return NULL;
uint8_t* result = NULL;
CFMutableDataRef otr_state = sessSerialized(coder, error);
if(otr_state) {
result = ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, der_end, der,
der_encode_data(otr_state, error, der,
der_encode_bool(coder->waitingForDataPacket, der,
der_encode_optional_data(coder->pendingResponse, error, der, der_end))));
CFReleaseSafe(otr_state);
}
return result;
}
uint8_t* der_encode_RecoveryKeyBag(SOSRecoveryKeyBagRef RecoveryKeyBag, CFErrorRef *error,
const uint8_t *der, uint8_t *der_end) {
uint8_t *result = NULL;
if (der_end == NULL) return der_end;
if(RecoveryKeyBag && RecoveryKeyBag->recoveryKeyBag && RecoveryKeyBag->accountDSID && RecoveryKeyBag->generation) {
der_end = ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, der_end, der,
der_encode_string(RecoveryKeyBag->accountDSID, error, der,
SOSGenCountEncodeToDER(RecoveryKeyBag->generation, error, der,
ccder_encode_uint64(RecoveryKeyBag->rkbVersion, der,
der_encode_data(RecoveryKeyBag->recoveryKeyBag, error, der, der_end)))));
require_quiet(der_end == der, errOut);
result = der_end;
} else {
SOSCreateError(kSOSErrorEncodeFailure, CFSTR("Null RecoveryKeyBag"), NULL, error);
}
errOut:
return result;
}
uint8_t* der_encode_generalizedtime(CFAbsoluteTime at, CFErrorRef *error,
const uint8_t *der, uint8_t *der_end)
{
return ccder_encode_constructed_tl(CCDER_GENERALIZED_TIME, der_end, der,
der_encode_generalizedtime_body(at, error, der, der_end));
}
size_t der_sizeof_dictionary(CFDictionaryRef dict, CFErrorRef *error)
{
struct size_context context = { .success = true, .size = 0, .error = error };
CFDictionaryApplyFunction(dict, add_key_value_size, &context);
if (!context.success)
return 0;
return ccder_sizeof(CCDER_CONSTRUCTED_SET, context.size);
}
static uint8_t* der_encode_key_value(CFPropertyListRef key, CFPropertyListRef value, CFErrorRef *error,
const uint8_t* der, uint8_t *der_end)
{
return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, der_end, der,
der_encode_plist(key, error, der,
der_encode_plist(value, error, der, der_end)));
}
struct encode_context {
bool success;
CFErrorRef * error;
CFMutableArrayRef list;
CFAllocatorRef allocator;
};
static void add_sequence_to_array(const void *key_void, const void *value_void, void *context_void)
{
struct encode_context *context = (struct encode_context *) context_void;
if (context->success) {
CFTypeRef key = (CFTypeRef) key_void;
CFTypeRef value = (CFTypeRef) value_void;
size_t der_size = der_sizeof_key_value(key, value, context->error);
if (der_size == 0) {
context-> success = false;
} else {
CFMutableDataRef encoded_kv = CFDataCreateMutable(context->allocator, der_size);
CFDataSetLength(encoded_kv, der_size);
uint8_t* const encode_begin = CFDataGetMutableBytePtr(encoded_kv);
uint8_t* encode_end = encode_begin + der_size;
encode_end = der_encode_key_value(key, value, context->error, encode_begin, encode_end);
if (encode_end != NULL) {
CFDataDeleteBytes(encoded_kv, CFRangeMake(0, (encode_end - encode_begin)));
CFArrayAppendValue(context->list, encoded_kv);
} else {
context-> success = false;
}
CFReleaseNull(encoded_kv);
}
}
}
static CFComparisonResult cfdata_compare_contents(const void *val1, const void *val2, void *context __unused)
{
return CFDataCompare((CFDataRef) val1, (CFDataRef) val2);
}
uint8_t* der_encode_dictionary(CFDictionaryRef dictionary, CFErrorRef *error,
const uint8_t *der, uint8_t *der_end)
{
CFMutableArrayRef elements = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
struct encode_context context = { .success = true, .error = error, .list = elements };
CFDictionaryApplyFunction(dictionary, add_sequence_to_array, &context);
if (!context.success) {
CFReleaseNull(elements);
return NULL;
}
CFRange allOfThem = CFRangeMake(0, CFArrayGetCount(elements));
CFArraySortValues(elements, allOfThem, cfdata_compare_contents, NULL);
uint8_t* original_der_end = der_end;
for(CFIndex position = CFArrayGetCount(elements); position > 0;) {
--position;
CFDataRef data = CFArrayGetValueAtIndex(elements, position);
der_end = ccder_encode_body(CFDataGetLength(data), CFDataGetBytePtr(data), der, der_end);
}
CFReleaseNull(elements);
return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SET, original_der_end, der, der_end);
}
