Security-55471.tar.gz

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

diff --git a/utilities/src/der_array.c b/utilities/src/der_array.c
new file mode 100644 (file)
index 0000000..4ca54f6
--- /dev/null
+++ b/utilities/src/der_array.c
@@ -0,0 +1,75 @@
+//
+//  der_array.c
+//  utilities
+//
+//  Created by Mitch Adler on 7/2/12.
+//  Copyright (c) 2012 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_array(CFAllocatorRef allocator, CFOptionFlags mutability,
+                                CFArrayRef* array, CFErrorRef *error,
+                                const uint8_t* der, const uint8_t *der_end)
+{
+    if (NULL == der)
+        return NULL;
+
+    CFMutableArrayRef result = CFArrayCreateMutable(allocator, 0, &kCFTypeArrayCallBacks);
+
+    const uint8_t *elements_end;
+    const uint8_t *current_element = ccder_decode_sequence_tl(&elements_end, der, der_end);
+    
+    while (current_element != NULL && current_element < elements_end) {
+        CFPropertyListRef element = NULL;
+        current_element = der_decode_plist(allocator, mutability, &element, error, current_element, elements_end);
+        if (current_element) {
+            CFArrayAppendValue(result, element);
+            CFReleaseNull(element);
+        }
+    }
+
+    if (current_element) {
+        *array = result;
+        result = NULL;
+    }
+
+    CFReleaseNull(result);
+    return current_element;
+}
+
+
+size_t der_sizeof_array(CFArrayRef data, CFErrorRef *error)
+{
+    size_t body_size = 0;
+    for(CFIndex position = CFArrayGetCount(data) - 1;
+        position >= 0;
+        --position)
+    {
+        body_size += der_sizeof_plist(CFArrayGetValueAtIndex(data, position), error);
+    }
+    return ccder_sizeof(CCDER_CONSTRUCTED_SEQUENCE, body_size);
+}
+
+
+uint8_t* der_encode_array(CFArrayRef array, CFErrorRef *error,
+                          const uint8_t *der, uint8_t *der_end)
+{
+    uint8_t* original_der_end = der_end;
+    for(CFIndex position = CFArrayGetCount(array) - 1;
+        position >= 0;
+        --position)
+    {
+        der_end = der_encode_plist(CFArrayGetValueAtIndex(array, position), error, der, der_end);
+    }
+    
+    return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, original_der_end, der, der_end);
+}