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[apple/security.git] / Security / libsecurity_codesigning / lib / SecStaticCode.cpp
diff --git a/Security/libsecurity_codesigning/lib/SecStaticCode.cpp b/Security/libsecurity_codesigning/lib/SecStaticCode.cpp
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+/*
+ * Copyright (c) 2006-2007,2011-2014 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@
+ */
+
+//
+// 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");
+const CFStringRef kSecCodeAttributeUniversalFileOffset =       CFSTR("UniversalFileOffset");
+
+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, offset;
+               if (cfscan(attributes, "{%O=%d}", kSecCodeAttributeUniversalFileOffset, &offset)) {
+                       ctx.offset = offset;
+               } else 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
+//
+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,
+                 kSecCSReportProgress
+               | kSecCSCheckAllArchitectures
+               | kSecCSDoNotValidateExecutable
+               | kSecCSDoNotValidateResources
+               | kSecCSConsiderExpiration
+        | kSecCSEnforceRevocationChecks
+               | kSecCSNoNetworkAccess
+               | kSecCSCheckNestedCode
+               | kSecCSStrictValidate);
+       
+       if (errors)
+               flags |= kSecCSFullReport;      // internal-use flag
+
+       SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(staticCodeRef);
+       code->setValidationFlags(flags);
+       const SecRequirement *req = SecRequirement::optional(requirementRef);
+       DTRACK(CODESIGN_EVAL_STATIC, code, (char*)code->mainExecutablePath().c_str());
+       code->staticValidate(flags, req);
+
+       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->copyCanonicalPath();
+
+       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);
+
+       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
+}
+
+
+//
+// Attach a callback block to a code object
+//
+OSStatus SecStaticCodeSetCallback(SecStaticCodeRef codeRef, SecCSFlags flags, SecCodeCallback *old, SecCodeCallback monitor)
+{
+       BEGIN_CSAPI
+
+       checkFlags(flags);
+       SecStaticCode *code = SecStaticCode::requiredStatic(codeRef);
+       if (old)
+               *old = code->monitor();
+       code->setMonitor(monitor);
+
+       END_CSAPI
+}
+
+
+OSStatus SecStaticCodeSetValidationConditions(SecStaticCodeRef codeRef, CFDictionaryRef conditions)
+{
+       BEGIN_CSAPI
+       
+       checkFlags(0);
+       SecStaticCode *code = SecStaticCode::requiredStatic(codeRef);
+       code->setValidationModifiers(conditions);
+       
+       END_CSAPI
+}
+
+
+//
+// Set cancellation flag on a static code object.
+//
+OSStatus SecStaticCodeCancelValidation(SecStaticCodeRef codeRef, SecCSFlags flags)
+{
+       BEGIN_CSAPI
+       
+       checkFlags(0);
+       SecStaticCode *code = SecStaticCode::requiredStatic(codeRef);
+       code->cancelValidation();
+       
+       END_CSAPI
+}