--- /dev/null
+/*
+ * Copyright (c) 2002-2004,2011-2014 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@
+ */
+
+//
+// TrustedApplication.cpp
+//
+#include <security_keychain/TrustedApplication.h>
+#include <security_keychain/ACL.h>
+#include <security_utilities/osxcode.h>
+#include <security_utilities/trackingallocator.h>
+#include <security_cdsa_utilities/acl_codesigning.h>
+#include <sys/syslimits.h>
+#include <memory>
+
+using namespace KeychainCore;
+
+
+//
+// Create a TrustedApplication from a code-signing ACL subject.
+// Throws ACL::ParseError if the subject is unexpected.
+//
+TrustedApplication::TrustedApplication(const TypedList &subject)
+{
+ try {
+ CodeSignatureAclSubject::Maker maker;
+ mForm = maker.make(subject);
+ secdebug("trustedapp", "%p created from list form", this);
+ IFDUMPING("codesign", mForm->AclSubject::dump("STApp created from list"));
+ } catch (...) {
+ throw ACL::ParseError();
+ }
+}
+
+
+//
+// Create a TrustedApplication from a path-to-object-on-disk
+//
+TrustedApplication::TrustedApplication(const std::string &path)
+{
+ RefPointer<OSXCode> code(OSXCode::at(path));
+ mForm = new CodeSignatureAclSubject(OSXVerifier(code));
+ secdebug("trustedapp", "%p created from path %s", this, path.c_str());
+ IFDUMPING("codesign", mForm->AclSubject::dump("STApp created from path"));
+}
+
+
+//
+// Create a TrustedApplication for the calling process
+//
+TrustedApplication::TrustedApplication()
+{
+ //@@@@ should use CS's idea of "self"
+ RefPointer<OSXCode> me(OSXCode::main());
+ mForm = new CodeSignatureAclSubject(OSXVerifier(me));
+ secdebug("trustedapp", "%p created from self", this);
+ IFDUMPING("codesign", mForm->AclSubject::dump("STApp created from self"));
+}
+
+
+//
+// Create a TrustedApplication from a SecRequirementRef.
+// Note that the path argument is only stored for documentation;
+// it is NOT used to denote anything on disk.
+//
+TrustedApplication::TrustedApplication(const std::string &path, SecRequirementRef reqRef)
+{
+ CFRef<CFDataRef> reqData;
+ MacOSError::check(SecRequirementCopyData(reqRef, kSecCSDefaultFlags, &reqData.aref()));
+ mForm = new CodeSignatureAclSubject(NULL, path);
+ mForm->add((const BlobCore *)CFDataGetBytePtr(reqData));
+ secdebug("trustedapp", "%p created from path %s and requirement %p",
+ this, path.c_str(), reqRef);
+ IFDUMPING("codesign", mForm->debugDump());
+}
+
+
+TrustedApplication::~TrustedApplication()
+{ /* virtual */ }
+
+
+//
+// Convert from/to external data form.
+//
+// Since a TrustedApplication's data is essentially a CodeSignatureAclSubject,
+// we just use the subject's externalizer to produce the data. That requires us
+// to use the somewhat idiosyncratic linearizer used by CSSM ACL subjects, but
+// that's a small price to pay for consistency.
+//
+TrustedApplication::TrustedApplication(CFDataRef external)
+{
+ AclSubject::Reader pubReader(CFDataGetBytePtr(external)), privReader;
+ mForm = CodeSignatureAclSubject::Maker().make(0, pubReader, privReader);
+}
+
+CFDataRef TrustedApplication::externalForm() const
+{
+ AclSubject::Writer::Counter pubCounter, privCounter;
+ mForm->exportBlob(pubCounter, privCounter);
+ if (privCounter > 0) // private exported data - format violation
+ CssmError::throwMe(CSSMERR_CSSM_INTERNAL_ERROR);
+ CFRef<CFMutableDataRef> data = CFDataCreateMutable(NULL, pubCounter);
+ CFDataSetLength(data, pubCounter);
+ if (CFDataGetLength(data) < CFIndex(pubCounter))
+ CFError::throwMe();
+ AclSubject::Writer pubWriter(CFDataGetMutableBytePtr(data)), privWriter;
+ mForm->exportBlob(pubWriter, privWriter);
+ return data.yield();
+}
+
+void TrustedApplication::data(CFDataRef data)
+{
+ const char *p = (const char *)CFDataGetBytePtr(data);
+ const std::string path(p, p + CFDataGetLength(data));
+ RefPointer<OSXCode> code(OSXCode::at(path));
+ mForm = new CodeSignatureAclSubject(OSXVerifier(code));
+}
+
+//
+// Direct verification interface.
+// If path == NULL, we verify against the running code itself.
+//
+bool TrustedApplication::verifyToDisk(const char *path)
+{
+ if (SecRequirementRef requirement = mForm->requirement()) {
+ secdebug("trustedapp", "%p validating requirement against path %s", this, path);
+ CFRef<SecStaticCodeRef> ondisk;
+ if (path)
+ MacOSError::check(SecStaticCodeCreateWithPath(CFTempURL(path),
+ kSecCSDefaultFlags, &ondisk.aref()));
+ else
+ MacOSError::check(SecCodeCopySelf(kSecCSDefaultFlags, (SecCodeRef *)&ondisk.aref()));
+ return SecStaticCodeCheckValidity(ondisk, kSecCSDefaultFlags, requirement) == errSecSuccess;
+ } else {
+ secdebug("trustedapp", "%p validating hash against path %s", this, path);
+ RefPointer<OSXCode> code = path ? OSXCode::at(path) : OSXCode::main();
+ SHA1::Digest ondiskDigest;
+ OSXVerifier::makeLegacyHash(code, ondiskDigest);
+ return memcmp(ondiskDigest, mForm->legacyHash(), sizeof(ondiskDigest)) == 0;
+ }
+}
+
+
+//
+// Produce a TypedList representing a code-signing ACL subject
+// for this application.
+// Memory is allocated from the allocator given, and belongs to
+// the caller.
+//
+CssmList TrustedApplication::makeSubject(Allocator &allocator)
+{
+ return mForm->toList(allocator);
+}
+
+
+//
+// On a completely different note...
+// Read a simple text file from disk and cache the lines in a set.
+// This is used during re-prebinding to cut down on the number of
+// equivalency records being generated.
+// This feature is otherwise completely unconnected to anything else here.
+//
+PathDatabase::PathDatabase(const char *path)
+{
+ if (FILE *f = fopen(path, "r")) {
+ mQualifyAll = false;
+ char path[PATH_MAX+1];
+ while (fgets(path, sizeof(path), f)) {
+ path[strlen(path)-1] = '\0'; // strip NL
+ mPaths.insert(path);
+ }
+ fclose(f);
+ secdebug("equivdb", "read %ld paths from %s", mPaths.size(), path);
+ } else {
+ mQualifyAll = true;
+ secdebug("equivdb", "cannot open %s, will qualify all application paths", path);
+ }
+}
+
+
+bool PathDatabase::lookup(const string &inPath)
+{
+ string path = inPath;
+ string::size_type lastSlash = path.rfind('/');
+ string::size_type bundleCore = path.find("/Contents/MacOS/");
+ if (lastSlash != string::npos && bundleCore != string::npos)
+ if (bundleCore + 15 == lastSlash)
+ path = path.substr(0, bundleCore); // @@@ path is being modified here so it can't be const.
+ return mPaths.find(path) != mPaths.end();
+}
projects / apple / security.git / blobdiff