Security-55471.tar.gz

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

diff --git a/utilities/src/der_data.c b/utilities/src/der_data.c
new file mode 100644 (file)
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+++ b/utilities/src/der_data.c
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+//
+//  der_data.c
+//  utilities
+//
+//  Created by Mitch Adler on 6/18/12.
+//  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_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(kSecDERErrorUnderlyingError, 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(kSecDERErrorUnderlyingError, 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));
+
+}