Security-55163.44.tar.gz

[apple/security.git] / libsecurity_codesigning / lib / xar++.cpp

diff --git a/libsecurity_codesigning/lib/xar++.cpp b/libsecurity_codesigning/lib/xar++.cpp
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+++ b/libsecurity_codesigning/lib/xar++.cpp
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+/*
+ * Copyright (c) 2011 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@
+ */
+
+//
+// xar++ - interface to XAR-format archive files
+//
+#include "xar++.h"
+#include <security_utilities/cfutilities.h>
+#include <Security/Security.h>
+
+
+namespace Security {
+namespace CodeSigning {
+
+
+Xar::Xar(const char *path)
+{
+       mXar = 0;
+       mSigCMS = 0;
+       mSigClassic = 0;
+       if (path)
+               open(path);
+}
+
+void Xar::open(const char *path)
+{
+       if ((mXar = ::xar_open(path, READ)) == NULL)
+           return;
+    
+       xar_signature_t sig = ::xar_signature_first(mXar);
+       // read signatures until we find a CMS signature
+       while (sig && mSigCMS == NULL) {
+               const char *type = ::xar_signature_type(sig);
+               if (strcmp(type, "CMS") == 0) {
+                       mSigCMS = sig;
+               } else if (strcmp(type, "RSA") == 0) {
+                       mSigClassic = sig;
+               }
+               sig = ::xar_signature_next(sig);
+       }
+}
+
+Xar::~Xar()
+{
+       if (mXar)
+               ::xar_close(mXar);
+}
+
+static CFArrayRef copyCertChainFromSignature(xar_signature_t sig)
+{
+       unsigned count = xar_signature_get_x509certificate_count(sig);
+       CFRef<CFMutableArrayRef> certs = makeCFMutableArray(0);
+       for (unsigned ix = 0; ix < count; ix++) {
+               const uint8_t *data;
+               uint32_t length;
+               if (xar_signature_get_x509certificate_data(sig, ix, &data, &length) == 0) {
+                       CFTempData cdata(data, length);
+                       CFRef<SecCertificateRef> cert = SecCertificateCreateWithData(NULL, cdata);
+                       CFArrayAppendValue(certs, cert.get());
+               }
+       }
+       return certs.yield();
+}
+
+CFArrayRef Xar::copyCertChain()
+{
+       if (mSigCMS)
+               return copyCertChainFromSignature(mSigCMS);
+       else if (mSigClassic)
+               return copyCertChainFromSignature(mSigClassic);
+       return NULL;
+}
+
+
+} // end namespace CodeSigning
+} // end namespace Security