X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/OSX/utilities/src/der_set.c?ds=sidebyside

diff --git a/OSX/utilities/src/der_set.c b/OSX/utilities/src/der_set.c
new file mode 100644
index 00000000..8bf2a895
--- /dev/null
+++ b/OSX/utilities/src/der_set.c
@@ -0,0 +1,186 @@
+/*
+ * Copyright (c) 2015 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+#include <stdio.h>
+#include "der_set.h"
+
+#include "utilities/SecCFRelease.h"
+#include "utilities/der_plist.h"
+#include "utilities/der_plist_internal.h"
+#include "utilities/SecCFWrappers.h"
+
+#include <corecrypto/ccder.h>
+#include <CoreFoundation/CoreFoundation.h>
+
+const uint8_t* der_decode_set(CFAllocatorRef allocator, CFOptionFlags mutability,
+                                     CFSetRef* set, CFErrorRef *error,
+                                     const uint8_t* der, const uint8_t *der_end)
+{
+    if (NULL == der)
+        return NULL;
+    
+    const uint8_t *payload_end = 0;
+    const uint8_t *payload = ccder_decode_constructed_tl(CCDER_CONSTRUCTED_CFSET, &payload_end, der, der_end);
+    
+    if (NULL == payload) {
+        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown data encoding, expected CCDER_CONSTRUCTED_CFSET"), NULL, error);
+        return NULL;
+    }
+    
+    CFMutableSetRef theSet = (set && *set) ? CFSetCreateMutableCopy(allocator, 0, *set)
+                                           : CFSetCreateMutable(allocator, 0, &kCFTypeSetCallBacks);
+    
+    if (NULL == theSet) {
+        SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("Failed to create set"), NULL, error);
+        payload = NULL;
+        goto exit;
+    }
+    
+    while (payload != NULL && payload < payload_end) {
+        CFTypeRef value = NULL;
+        
+        payload = der_decode_plist(allocator, mutability, &value, error, payload, payload_end);
+        
+        if (payload) {
+            CFSetAddValue(theSet, value);
+        }
+        CFReleaseNull(value);
+    }
+    
+    
+exit:
+    if (payload == payload_end && set) {
+        CFTransferRetained(*set, theSet);
+    }
+    
+    CFReleaseNull(theSet);
+    
+    return payload;
+}
+
+struct size_context {
+    bool   success;
+    size_t size;
+    CFErrorRef *error;
+};
+
+static void add_value_size(const void *value_void, void *context_void)
+{
+    CFTypeRef value = (CFTypeRef) value_void;
+    struct size_context *context = (struct size_context*) context_void;
+    
+    if (!context->success)
+        return;
+    
+    size_t kv_size = der_sizeof_plist(value, context->error);
+    if (kv_size == 0) {
+        context->success = false;
+        return;
+    }
+    
+    context->size += kv_size;
+}
+
+size_t der_sizeof_set(CFSetRef dict, CFErrorRef *error)
+{
+    struct size_context context = { .success = true, .size = 0, .error = error };
+    
+    CFSetApplyFunction(dict, add_value_size, &context);
+    
+    if (!context.success)
+        return 0;
+    
+    return ccder_sizeof(CCDER_CONSTRUCTED_CFSET, context.size);
+}
+
+struct encode_context {
+    bool         success;
+    CFErrorRef * error;
+    CFMutableArrayRef list;
+    CFAllocatorRef allocator;
+};
+
+static void add_sequence_to_array(const void *value_void, void *context_void)
+{
+    struct encode_context *context = (struct encode_context *) context_void;
+    if (context->success) {
+        size_t der_size = der_sizeof_plist(value_void, context->error);
+        if (der_size == 0) {
+            context-> success = false;
+        } else {
+            CFMutableDataRef value = CFDataCreateMutable(context->allocator, der_size);
+            CFDataSetLength(value, der_size);
+            
+            uint8_t* const encode_begin = CFDataGetMutableBytePtr(value);
+            uint8_t *encode_end = encode_begin + der_size;
+            
+            encode_end = der_encode_plist(value_void, context->error, encode_begin, encode_end);
+            
+            if (encode_end != NULL) {
+                CFDataDeleteBytes(value, CFRangeMake(0, (encode_end - encode_begin)));
+                CFArrayAppendValue(context->list, value);
+            } else {
+                context-> success = false;
+            }
+            CFReleaseNull(value);
+        }
+    }
+}
+
+static CFComparisonResult cfdata_compare_contents(const void *val1, const void *val2, void *context __unused)
+{
+    return CFDataCompare((CFDataRef) val1, (CFDataRef) val2);
+}
+
+
+uint8_t* der_encode_set(CFSetRef set, 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 };
+    CFSetApplyFunction(set, 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_CFSET, original_der_end, der, der_end);
+    
+}