1/* 2 * Copyright (c) 2006-2008,2011-2012 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// detachedrep - prefix diskrep representing a detached signature stored in a file 26// 27#include "detachedrep.h" 28 29 30namespace Security { 31namespace CodeSigning { 32 33 34// 35// We construct a DetachedRep from the data blob of the detached signature 36// and a reference of the original DiskRep we chain to. 37// We accept an EmbeddedSignatureBlob (for a non-architected signature) 38// or a DetachedSignatureBlob (for architected signatures) that is a SuperBlob 39// of EmbeddedSignatureBlobs. 40// 41DetachedRep::DetachedRep(CFDataRef sig, DiskRep *orig, const std::string &source) 42 : FilterRep(orig), mSig(sig), mFull(true), mSource(source) 43{ 44 const BlobCore *sigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(sig)); 45 if (sigBlob->is<EmbeddedSignatureBlob>()) { // architecture-less 46 if ((mArch = EmbeddedSignatureBlob::specific(sigBlob))) { 47 mGlobal = NULL; 48 CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), NULL); 49 return; 50 } 51 } else if (sigBlob->is<DetachedSignatureBlob>()) // architecture collection 52 if (const DetachedSignatureBlob *dsblob = DetachedSignatureBlob::specific(sigBlob)) 53 if (Universal *fat = orig->mainExecutableImage()) 54 if (const BlobCore *blob = dsblob->find(fat->bestNativeArch().cpuType())) 55 if ((mArch = EmbeddedSignatureBlob::specific(blob))) 56 if ((mGlobal = EmbeddedSignatureBlob::specific(dsblob->find(0)))) { 57 CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), (void*)mGlobal); 58 return; 59 } 60 MacOSError::throwMe(errSecCSSignatureInvalid); 61} 62 63 64// 65// Here's a version to construct a DetachedRep if we already have the right architecture 66// and (optional) associated global blob. Just take them. 67// 68DetachedRep::DetachedRep(CFDataRef sig, CFDataRef gsig, DiskRep *orig, const std::string &source) 69 : FilterRep(orig), mSig(sig), mGSig(gsig), mFull(false), mSource(source) 70{ 71 const BlobCore *sigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(sig)); 72 mArch = EmbeddedSignatureBlob::specific(sigBlob); 73 if (!mArch) 74 MacOSError::throwMe(errSecCSSignatureInvalid); 75 if (gsig) { 76 const BlobCore *gsigBlob = reinterpret_cast<const BlobCore *>(CFDataGetBytePtr(gsig)); 77 mGlobal = EmbeddedSignatureBlob::specific(gsigBlob); 78 if (!mGlobal) 79 MacOSError::throwMe(errSecCSSignatureInvalid); 80 } else 81 mGlobal = NULL; 82 CODESIGN_DISKREP_CREATE_DETACHED(this, orig, (char*)source.c_str(), (void*)mGlobal); 83} 84 85 86// 87// We look up components by first checking for a per-architecture item, 88// then for a global item in the detached signature, and finally falling 89// back on the original DiskRep (for static components). 90// 91CFDataRef DetachedRep::component(CodeDirectory::SpecialSlot slot) 92{ 93 if (CFDataRef result = mArch->component(slot)) 94 return result; 95 if (mGlobal) 96 if (CFDataRef result = mGlobal->component(slot)) 97 return result; 98 return this->base()->component(slot); 99} 100 101 102} // end namespace CodeSigning 103} // end namespace Security 104