SecStaticCode.cpp   [plain text]

/*
 * Copyright (c) 2006-2007 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@
 */

//
// SecStaticCode - API frame for SecStaticCode objects
//
#include "cs.h"
#include "StaticCode.h"
#include <fcntl.h>

using namespace CodeSigning;


//
// CF-standard type code function
//
CFTypeID SecStaticCodeGetTypeID(void)
{
	BEGIN_CSAPI
	return gCFObjects().StaticCode.typeID;
    END_CSAPI1(_kCFRuntimeNotATypeID)
}


//
// Create an StaticCode directly from disk path.
//
OSStatus SecStaticCodeCreateWithPath(CFURLRef path, SecCSFlags flags, SecStaticCodeRef *staticCodeRef)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	Required(staticCodeRef) = (new SecStaticCode(DiskRep::bestGuess(cfString(path).c_str())))->handle();

	END_CSAPI
}


//
// Check static validity of a StaticCode
//
OSStatus SecStaticCodeCheckValidity(SecStaticCodeRef staticCodeRef, SecCSFlags flags,
	SecRequirementRef requirementRef)
{
	return SecStaticCodeCheckValidityWithErrors(staticCodeRef, flags, requirementRef, NULL);
}

OSStatus SecStaticCodeCheckValidityWithErrors(SecStaticCodeRef staticCodeRef, SecCSFlags flags,
	SecRequirementRef requirementRef, CFErrorRef *errors)
{
	BEGIN_CSAPI
	
	checkFlags(flags,
		  kSecCSCheckAllArchitectures
		| kSecCSDoNotValidateExecutable
		| kSecCSDoNotValidateResources
		| kSecCSConsiderExpiration);

	SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(staticCodeRef);
	DTRACK(CODESIGN_EVAL_STATIC, code, (char*)code->mainExecutablePath().c_str());
	code->validateDirectory();
	if (!(flags & kSecCSDoNotValidateExecutable))
		code->validateExecutable();
	if (!(flags & kSecCSDoNotValidateResources))
		code->validateResources();
	if (const SecRequirement *req = SecRequirement::optional(requirementRef))
		code->validateRequirements(req->requirement(), errSecCSReqFailed);

	END_CSAPI_ERRORS
}


//
// ====================================================================================
//
// The following API functions are called SecCode* but accept both SecCodeRef and
// SecStaticCodeRef arguments, operating on the implied SecStaticCodeRef as appropriate.
// Hence they're here, rather than in SecCode.cpp.
//


//
// Retrieve location information for an StaticCode.
//
OSStatus SecCodeCopyPath(SecStaticCodeRef staticCodeRef, SecCSFlags flags, CFURLRef *path)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	SecPointer<SecStaticCode> staticCode = SecStaticCode::requiredStatic(staticCodeRef);
	Required(path) = staticCode->canonicalPath();

	END_CSAPI
}


//
// Fetch or make up a designated requirement
//
OSStatus SecCodeCopyDesignatedRequirement(SecStaticCodeRef staticCodeRef, SecCSFlags flags,
	SecRequirementRef *requirementRef)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	const Requirement *req =
		SecStaticCode::requiredStatic(staticCodeRef)->designatedRequirement();
	Required(requirementRef) = (new SecRequirement(req))->handle();

	END_CSAPI
}


//
// Fetch a particular internal requirement, if present
//
OSStatus SecCodeCopyInternalRequirement(SecStaticCodeRef staticCodeRef, SecRequirementType type,
	SecCSFlags flags, SecRequirementRef *requirementRef)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	const Requirement *req =
		SecStaticCode::requiredStatic(staticCodeRef)->internalRequirement(type);
	Required(requirementRef) = req ? (new SecRequirement(req))->handle() : NULL;

	END_CSAPI
}


//
// Record for future use a detached code signature.
//
OSStatus SecCodeSetDetachedSignature(SecStaticCodeRef codeRef, CFDataRef signature,
	SecCSFlags flags)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(codeRef);

	if (signature)
		CFRetain(signature);	// own a reference...
	code->detachedSignature(signature); // ... and pass it to the code
	code->resetValidity();

	END_CSAPI
}


//
// Attach a code signature to a kernel memory mapping for page-in validation.
//
OSStatus SecCodeMapMemory(SecStaticCodeRef codeRef, SecCSFlags flags)
{
	BEGIN_CSAPI
	
	checkFlags(flags);
	SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(codeRef);
	if (const CodeDirectory *cd = code->codeDirectory(false)) {
		fsignatures args = { code->diskRep()->signingBase(), (void *)cd, cd->length() };
		UnixError::check(::fcntl(code->diskRep()->fd(), F_ADDSIGS, &args));
	} else
		MacOSError::throwMe(errSecCSUnsigned);

	END_CSAPI
}