--- /dev/null
+/*
+ * 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 <security_utilities/cfmunge.h>
+#include <fcntl.h>
+#include <dirent.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);
+ CodeSigning::Required(staticCodeRef) = (new SecStaticCode(DiskRep::bestGuess(cfString(path).c_str())))->handle();
+
+ END_CSAPI
+}
+
+const CFStringRef kSecCodeAttributeArchitecture = CFSTR("architecture");
+const CFStringRef kSecCodeAttributeSubarchitecture =CFSTR("subarchitecture");
+const CFStringRef kSecCodeAttributeBundleVersion = CFSTR("bundleversion");
+
+OSStatus SecStaticCodeCreateWithPathAndAttributes(CFURLRef path, SecCSFlags flags, CFDictionaryRef attributes,
+ SecStaticCodeRef *staticCodeRef)
+{
+ BEGIN_CSAPI
+
+ checkFlags(flags);
+ DiskRep::Context ctx;
+ std::string version; // holds memory placed into ctx
+ if (attributes) {
+ std::string archName;
+ int archNumber, subarchNumber;
+ if (cfscan(attributes, "{%O=%s}", kSecCodeAttributeArchitecture, &archName)) {
+ ctx.arch = Architecture(archName.c_str());
+ } else if (cfscan(attributes, "{%O=%d,%O=%d}",
+ kSecCodeAttributeArchitecture, &archNumber, kSecCodeAttributeSubarchitecture, &subarchNumber))
+ ctx.arch = Architecture(archNumber, subarchNumber);
+ else if (cfscan(attributes, "{%O=%d}", kSecCodeAttributeArchitecture, &archNumber))
+ ctx.arch = Architecture(archNumber);
+ if (cfscan(attributes, "{%O=%s}", kSecCodeAttributeBundleVersion, &version))
+ ctx.version = version.c_str();
+ }
+
+ CodeSigning::Required(staticCodeRef) = (new SecStaticCode(DiskRep::bestGuess(cfString(path).c_str(), &ctx)))->handle();
+
+ END_CSAPI
+}
+
+
+//
+// Check static validity of a StaticCode
+//
+static void validate(SecStaticCode *code, const SecRequirement *req, SecCSFlags flags);
+static void validateNested(string location, const SecRequirement *req, SecCSFlags flags, string exclude = "/");
+
+static void validate(SecStaticCode *code, const SecRequirement *req, SecCSFlags flags)
+{
+ try {
+ code->validateNonResourceComponents(); // also validates the CodeDirectory
+ if (!(flags & kSecCSDoNotValidateExecutable))
+ code->validateExecutable();
+ if (!(flags & kSecCSDoNotValidateResources))
+ code->validateResources();
+ if (req)
+ code->validateRequirement(req->requirement(), errSecCSReqFailed);
+ if (flags & kSecCSCheckNestedCode)
+ if (CFURLRef baseUrl = code->resourceBase()) {
+ // CFBundle has no orderly enumerator of these things, so this is somewhat ad-hoc.
+ // (It should be augmented by information in ResourceDirectory.)
+ string base = cfString(baseUrl) + "/";
+ validateNested(base + "Frameworks", req, flags);
+ validateNested(base + "SharedFrameworks", req, flags);
+ validateNested(base + "PlugIns", req, flags);
+ validateNested(base + "Plug-ins", req, flags);
+ validateNested(base + "XPCServices", req, flags);
+ validateNested(base + "MacOS", req, flags, code->mainExecutablePath()); // helpers
+ }
+ } catch (CSError &err) {
+ if (Universal *fat = code->diskRep()->mainExecutableImage()) // Mach-O
+ if (MachO *mach = fat->architecture()) {
+ err.augment(kSecCFErrorArchitecture, CFTempString(mach->architecture().displayName()));
+ delete mach;
+ }
+ throw;
+ } catch (const MacOSError &err) {
+ // add architecture information if we can get it
+ if (Universal *fat = code->diskRep()->mainExecutableImage())
+ if (MachO *mach = fat->architecture()) {
+ CFTempString arch(mach->architecture().displayName());
+ delete mach;
+ CSError::throwMe(err.error, kSecCFErrorArchitecture, arch);
+ }
+ // else just pass it on
+ throw;
+ }
+}
+
+static void validateNested(string location, const SecRequirement *req, SecCSFlags flags, string exclude)
+{
+ DIR *dir = opendir(location.c_str());
+ if (dir == 0) {
+ if (errno == ENOENT) // nothing there (okay)
+ return;
+ UnixError::throwMe();
+ }
+ while (struct dirent *dp = readdir(dir)) {
+ switch (dp->d_type) {
+ case DT_REG:
+ case DT_LNK:
+ case DT_DIR:
+ break;
+ default:
+ continue;
+ }
+ if (dp->d_name[0] == '.')
+ continue;
+ string path = location + "/" + dp->d_name;
+ if (path == exclude) // main executable; skip
+ continue;
+ try {
+ SecPointer<SecStaticCode> code = new SecStaticCode(DiskRep::bestGuess(path));
+ validate(code, req, flags);
+ } catch (CSError &err) {
+ err.augment(kSecCFErrorPath, CFTempURL(path));
+ throw;
+ }
+ }
+ closedir(dir);
+}
+
+
+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
+ | kSecCSEnforceRevocationChecks
+ | kSecCSCheckNestedCode);
+
+ SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(staticCodeRef);
+ const SecRequirement *req = SecRequirement::optional(requirementRef);
+ DTRACK(CODESIGN_EVAL_STATIC, code, (char*)code->mainExecutablePath().c_str());
+ if (flags & kSecCSCheckAllArchitectures) {
+ SecStaticCode::AllArchitectures archs(code);
+ while (SecPointer<SecStaticCode> scode = archs())
+ validate(scode, req, flags);
+ } else
+ validate(code, req, flags);
+
+ 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);
+ CodeSigning::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();
+ CodeSigning::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);
+ CodeSigning::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
+}
projects / apple / security.git / blobdiff