Security/libsecurity_codesigning/lib/xar++.cpp

   1 /*
   2  * Copyright (c) 2011-2012 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 //
  25 // xar++ - interface to XAR-format archive files
  26 //
  27 #include "xar++.h"
  28 #include <security_utilities/cfutilities.h>
  29 #include <Security/Security.h>
  30
  31
  32 namespace Security {
  33 namespace CodeSigning {
  34
  35
  36 Xar::Xar(const char *path)
  37 {
  38         mXar = 0;
  39         mSigCMS = 0;
  40         mSigClassic = 0;
  41         if (path)
  42                 open(path);
  43 }
  44
  45 void Xar::open(const char *path)
  46 {
  47         if ((mXar = ::xar_open(path, READ)) == NULL)
  48             return;
  49
  50         xar_signature_t sig = ::xar_signature_first(mXar);
  51         // read signatures until we find a CMS signature
  52         while (sig && mSigCMS == NULL) {
  53                 const char *type = ::xar_signature_type(sig);
  54                 if (strcmp(type, "CMS") == 0) {
  55                         mSigCMS = sig;
  56                 } else if (strcmp(type, "RSA") == 0) {
  57                         mSigClassic = sig;
  58                 }
  59                 sig = ::xar_signature_next(sig);
  60         }
  61 }
  62
  63 Xar::~Xar()
  64 {
  65         if (mXar)
  66                 ::xar_close(mXar);
  67 }
  68
  69 static CFArrayRef copyCertChainFromSignature(xar_signature_t sig)
  70 {
  71         unsigned count = xar_signature_get_x509certificate_count(sig);
  72         CFRef<CFMutableArrayRef> certs = makeCFMutableArray(0);
  73         for (unsigned ix = 0; ix < count; ix++) {
  74                 const uint8_t *data;
  75                 uint32_t length;
  76                 if (xar_signature_get_x509certificate_data(sig, ix, &data, &length) == 0) {
  77                         CFTempData cdata(data, length);
  78                         CFRef<SecCertificateRef> cert = SecCertificateCreateWithData(NULL, cdata);
  79                         CFArrayAppendValue(certs, cert.get());
  80                 }
  81         }
  82         return certs.yield();
  83 }
  84
  85 CFArrayRef Xar::copyCertChain()
  86 {
  87         if (mSigCMS)
  88                 return copyCertChainFromSignature(mSigCMS);
  89         else if (mSigClassic)
  90                 return copyCertChainFromSignature(mSigClassic);
  91         return NULL;
  92 }
  93
  94
  95 } // end namespace CodeSigning
  96 } // end namespace Security