Security-55471.tar.gz

[apple/security.git] / utilities / src / der_null.c

diff --git a/utilities/src/der_null.c b/utilities/src/der_null.c
new file mode 100644 (file)
index 0000000..52e3944
--- /dev/null
+++ b/utilities/src/der_null.c
@@ -0,0 +1,50 @@
+//
+//  der_null.c
+//  utilities
+//
+//  Created by Josh Osborne on 4/30/13.
+//  Copyright (c) 2013 Apple Inc. All rights reserved.
+//
+
+#include <stdio.h>
+
+#include "utilities/SecCFRelease.h"
+#include "utilities/der_plist.h"
+#include "utilities/der_plist_internal.h"
+
+#include <corecrypto/ccder.h>
+#include <CoreFoundation/CoreFoundation.h>
+
+
+const uint8_t* der_decode_null(CFAllocatorRef allocator, CFOptionFlags mutability,
+                                  CFNullRef* nul, CFErrorRef *error,
+                                  const uint8_t* der, const uint8_t *der_end)
+{
+    if (NULL == der)
+        return NULL;
+       
+    size_t payload_size = 0;
+    const uint8_t *payload = ccder_decode_tl(CCDER_NULL, &payload_size, der, der_end);
+       
+       if (NULL == payload || payload_size != 0) {
+        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown null encoding"), NULL, error);
+        return NULL;
+    }
+       
+    *nul = kCFNull;
+       
+    return payload + payload_size;
+}
+
+
+size_t der_sizeof_null(CFNullRef data __unused, CFErrorRef *error)
+{
+    return ccder_sizeof(CCDER_NULL, 0);
+}
+
+
+uint8_t* der_encode_null(CFNullRef boolean __unused, CFErrorRef *error,
+                            const uint8_t *der, uint8_t *der_end)
+{
+       return ccder_encode_tl(CCDER_NULL, 0, der, der_end);
+}