Security-57031.1.35.tar.gz

[apple/security.git] / Security / utilities / src / der_data.c

diff --git a/Security/utilities/src/der_data.c b/Security/utilities/src/der_data.c
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+++ b/Security/utilities/src/der_data.c
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+/*
+ * Copyright (c) 2012-2014 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 "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_data_mutable(CFAllocatorRef allocator, CFOptionFlags mutability,
+                                       CFMutableDataRef* data, 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_OCTET_STRING, &payload_size, der, der_end);
+
+    if (NULL == payload || (der_end - payload) < payload_size) {
+        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown data encoding"), NULL, error);
+        return NULL;
+    }
+
+    *data = CFDataCreateMutable(allocator, 0);
+
+    if (NULL == *data) {
+        SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("Failed to create data"), NULL, error);
+        return NULL;
+    }
+
+    CFDataAppendBytes(*data, payload, payload_size);
+
+    return payload + payload_size;
+}
+
+
+const uint8_t* der_decode_data(CFAllocatorRef allocator, CFOptionFlags mutability,
+                               CFDataRef* data, 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_OCTET_STRING, &payload_size, der, der_end);
+
+    if (NULL == payload || (der_end - payload) < payload_size) {
+        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown data encoding"), NULL, error);
+        return NULL;
+    }
+    
+    *data = CFDataCreate(allocator, payload, payload_size);
+
+    if (NULL == *data) {
+        SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("Failed to create data"), NULL, error);
+        return NULL;
+    }
+
+    return payload + payload_size;
+}
+
+
+size_t der_sizeof_data(CFDataRef data, CFErrorRef *error)
+{
+    return ccder_sizeof_raw_octet_string(CFDataGetLength(data));
+}
+
+
+uint8_t* der_encode_data(CFDataRef data, CFErrorRef *error,
+                         const uint8_t *der, uint8_t *der_end)
+{
+    const CFIndex data_length = CFDataGetLength(data);
+
+    return ccder_encode_tl(CCDER_OCTET_STRING, data_length, der,
+           ccder_encode_body(data_length, CFDataGetBytePtr(data), der, der_end));
+
+}