OSX/libsecurity_codesigning/lib/kerneldiskrep.cpp

   1 /*
   2  * Copyright (c) 2006,2011,2014 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 #include "kerneldiskrep.h"
  24 #include <sys/utsname.h>
  25
  26 namespace Security {
  27 namespace CodeSigning {
  28
  29 using namespace UnixPlusPlus;
  30
  31
  32 //
  33 // Everything about the kernel is pretty much fixed, so there's
  34 // no state to maintain.
  35 //
  36 KernelDiskRep::KernelDiskRep()
  37 {
  38         CODESIGN_DISKREP_CREATE_KERNEL(this);
  39 }
  40
  41
  42 //
  43 // We can't pull any resources from the kernel.
  44 // And we know where it all is.
  45 //
  46 CFDataRef KernelDiskRep::component(CodeDirectory::SpecialSlot slot)
  47 {
  48         return NULL;
  49 }
  50
  51 CFDataRef KernelDiskRep::identification()
  52 {
  53         return NULL;
  54 }
  55
  56
  57 CFURLRef KernelDiskRep::copyCanonicalPath()
  58 {
  59         return makeCFURL("/mach_kernel");
  60 }
  61
  62 string KernelDiskRep::recommendedIdentifier(const SigningContext &)
  63 {
  64         utsname names;
  65         UnixError::check(::uname(&names));
  66         return string("kernel.") + names.sysname;
  67 }
  68
  69 size_t KernelDiskRep::signingLimit()
  70 {
  71         return 0;                               // don't bother
  72 }
  73
  74 size_t KernelDiskRep::execSegLimit(const Architecture *)
  75 {
  76         return 0;                               // don't bother
  77 }
  78
  79 string KernelDiskRep::format()
  80 {
  81         return "system kernel";
  82 }
  83
  84 UnixPlusPlus::FileDesc &KernelDiskRep::fd()
  85 {
  86         UnixError::throwMe(EINVAL);             // don't have one
  87 }
  88
  89 string KernelDiskRep::mainExecutablePath()
  90 {
  91         return "/mach_kernel";
  92 }
  93
  94
  95 } // end namespace CodeSigning
  96 } // end namespace Security