Security-57031.1.35.tar.gz

[apple/security.git] / Security / sec / SOSCircle / SecureObjectSync / SOSAccountDer.c

diff --git a/Security/sec/SOSCircle/SecureObjectSync/SOSAccountDer.c b/Security/sec/SOSCircle/SecureObjectSync/SOSAccountDer.c
new file mode 100644 (file)
index 0000000..fc41dcd
--- /dev/null
+++ b/Security/sec/SOSCircle/SecureObjectSync/SOSAccountDer.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2013-2014 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 "SOSAccountPriv.h"
+
+//
+// DER Encoding utilities
+//
+
+//
+// Encodes data or a zero length data
+//
+size_t der_sizeof_data_or_null(CFDataRef data, CFErrorRef* error)
+{
+       if (data) {
+               return der_sizeof_data(data, error);
+       } else {
+               return der_sizeof_null(kCFNull, error);
+       }
+}
+
+uint8_t* der_encode_data_or_null(CFDataRef data, CFErrorRef* error, const uint8_t* der, uint8_t* der_end)
+{
+    if (data) {
+               return der_encode_data(data, error, der, der_end);
+       } else {
+               return der_encode_null(kCFNull, error, der, der_end);
+       }
+}
+
+
+const uint8_t* der_decode_data_or_null(CFAllocatorRef allocator, CFDataRef* data,
+                                              CFErrorRef* error,
+                                              const uint8_t* der, const uint8_t* der_end)
+{
+    CFTypeRef value = NULL;
+       der = der_decode_plist(allocator, 0, &value, error, der, der_end);
+       if (value && CFGetTypeID(value) != CFDataGetTypeID()) {
+               CFReleaseNull(value);
+       }
+       if (data) {
+               *data = value;
+       }
+       return der;
+}
+
+
+//
+// Mark: public_bytes encode/decode
+//
+
+size_t der_sizeof_public_bytes(SecKeyRef publicKey, CFErrorRef* error)
+{
+    CFDataRef publicData = NULL;
+    
+    if (publicKey)
+        SecKeyCopyPublicBytes(publicKey, &publicData);
+    
+    size_t size = der_sizeof_data_or_null(publicData, error);
+    
+    CFReleaseNull(publicData);
+    
+    return size;
+}
+
+uint8_t* der_encode_public_bytes(SecKeyRef publicKey, CFErrorRef* error, const uint8_t* der, uint8_t* der_end)
+{
+    CFDataRef publicData = NULL;
+    
+    if (publicKey)
+        SecKeyCopyPublicBytes(publicKey, &publicData);
+    
+    uint8_t *result = der_encode_data_or_null(publicData, error, der, der_end);
+    
+    CFReleaseNull(publicData);
+    
+    return result;
+}
+
+const uint8_t* der_decode_public_bytes(CFAllocatorRef allocator, CFIndex algorithmID, SecKeyRef* publicKey, CFErrorRef* error, const uint8_t* der, const uint8_t* der_end)
+{
+    CFDataRef dataFound = NULL;
+    der = der_decode_data_or_null(allocator, &dataFound, error, der, der_end);
+    
+    if (der && dataFound && publicKey) {
+        *publicKey = SecKeyCreateFromPublicData(allocator, algorithmID, dataFound);
+    }
+    CFReleaseNull(dataFound);
+    
+    return der;
+}
+
+
+
+
+//
+// bool encoding/decoding
+//
+
+
+const uint8_t* ccder_decode_bool(bool* boolean, 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_BOOLEAN, &payload_size, der, der_end);
+    
+    if (NULL == payload || (der_end - payload) < 1 || payload_size != 1) {
+        return NULL;
+    }
+    
+    if (boolean)
+        *boolean = (*payload != 0);
+    
+    return payload + payload_size;
+}
+
+
+size_t ccder_sizeof_bool(bool value __unused, CFErrorRef *error)
+{
+    return ccder_sizeof(CCDER_BOOLEAN, 1);
+}
+
+
+uint8_t* ccder_encode_bool(bool value, const uint8_t *der, uint8_t *der_end)
+{
+    uint8_t value_byte = value;
+    
+    return ccder_encode_tl(CCDER_BOOLEAN, 1, der,
+                           ccder_encode_body(1, &value_byte, der, der_end));
+}