+++ /dev/null
-//
-// SOSGenCount.c
-// sec
-//
-// Created by Richard Murphy on 1/29/15.
-//
-//
-
-#include "SOSGenCount.h"
-#include <utilities/SecCFWrappers.h>
-#include <CoreFoundation/CFLocale.h>
-#include <utilities/der_plist.h>
-#include <utilities/der_plist_internal.h>
-
-
-static CFAbsoluteTime SOSGenerationCountGetDateBits(int64_t genValue) {
- return (uint32_t) ((((uint64_t) genValue) >> 32) << 1);
-}
-
-void SOSGenerationCountWithDescription(SOSGenCountRef gen, void (^operation)(CFStringRef description)) {
- CFStringRef description = SOSGenerationCountCopyDescription(gen);
-
- operation(description);
-
- CFReleaseSafe(description);
-}
-
-CFStringRef SOSGenerationCountCopyDescription(SOSGenCountRef gen) {
- int64_t value = SOSGetGenerationSint(gen);
-
- CFMutableStringRef gcDecsription = CFStringCreateMutableCopy(kCFAllocatorDefault, 0, CFSTR("["));
-
- withStringOfAbsoluteTime(SOSGenerationCountGetDateBits(value), ^(CFStringRef decription) {
- CFStringAppend(gcDecsription, decription);
- });
-
- CFStringAppendFormat(gcDecsription, NULL, CFSTR(" %u]"), (uint32_t)(value & 0xFFFFFFFF));
-
- return gcDecsription;
-}
-
-int64_t SOSGetGenerationSint(SOSGenCountRef gen) {
- int64_t value;
- if(!gen) return 0;
- CFNumberGetValue(gen, kCFNumberSInt64Type, &value);
- return value;
-}
-
-static int64_t sosGenerationSetHighBits(int64_t value, int32_t high_31)
-{
- value &= 0xFFFFFFFF; // Keep the low 32 bits.
- value |= ((int64_t) high_31) << 32;
-
- return value;
-}
-
-static SOSGenCountRef sosGenerationCreateOrIncrement(SOSGenCountRef gen) {
- int64_t value = 0;
-
- if(gen) {
- value = SOSGetGenerationSint(gen);
- }
-
- if((value >> 32) == 0) {
- uint32_t seconds = CFAbsoluteTimeGetCurrent(); // seconds
- value = sosGenerationSetHighBits(value, (seconds >> 1));
- }
-
- value++;
- return CFNumberCreate(NULL, kCFNumberSInt64Type, &value);
-}
-
-SOSGenCountRef SOSGenerationCreate() {
- return sosGenerationCreateOrIncrement(NULL);
-}
-
-
-// We need this for a circle gencount test
-SOSGenCountRef SOSGenerationCreateWithValue(int64_t value) {
- return CFNumberCreate(NULL, kCFNumberSInt64Type, &value);
-}
-
-SOSGenCountRef SOSGenerationIncrementAndCreate(SOSGenCountRef gen) {
- return sosGenerationCreateOrIncrement(gen);
-}
-
-SOSGenCountRef SOSGenerationCopy(SOSGenCountRef gen) {
- if(!gen) return NULL;
- int64_t value = SOSGetGenerationSint(gen);
- return CFNumberCreate(NULL, kCFNumberSInt64Type, &value);
-}
-
-// Is current older than proposed?
-bool SOSGenerationIsOlder(SOSGenCountRef older, SOSGenCountRef newer) {
- switch(CFNumberCompare(older, newer, NULL)) {
- case kCFCompareLessThan: return true;
- case kCFCompareEqualTo: return false;
- case kCFCompareGreaterThan: return false;
- }
- return false;
-}
-
-// Is current older than proposed?
-static bool SOSGenerationIsOlderOrEqual(SOSGenCountRef older, SOSGenCountRef newer) {
- switch(CFNumberCompare(older, newer, NULL)) {
- case kCFCompareLessThan: return true;
- case kCFCompareEqualTo: return true;
- case kCFCompareGreaterThan: return false;
- }
- return false;
-}
-
-
-SOSGenCountRef SOSGenerationCreateWithBaseline(SOSGenCountRef reference) {
- SOSGenCountRef retval = SOSGenerationCreate();
- if(SOSGenerationIsOlderOrEqual(retval, reference)) {
- CFReleaseNull(retval);
- retval = SOSGenerationIncrementAndCreate(reference);
- }
- return retval;
-}
-
-
-SOSGenCountRef SOSGenCountCreateFromDER(CFAllocatorRef allocator, CFErrorRef* error,
- const uint8_t** der_p, const uint8_t *der_end) {
- SOSGenCountRef retval = NULL;
- *der_p = der_decode_number(allocator, 0, &retval, error, *der_p, der_end);
- if(retval == NULL)
- retval = SOSGenerationCreate();
- return retval;
-}
-
-size_t SOSGenCountGetDEREncodedSize(SOSGenCountRef gencount, CFErrorRef *error) {
- return der_sizeof_number(gencount, error);
-}
-
-uint8_t *SOSGenCountEncodeToDER(SOSGenCountRef gencount, CFErrorRef* error, const uint8_t* der, uint8_t* der_end) {
- return der_encode_number(gencount, error, der, der_end);
-}
-
-
-