OSX/libsecurity_codesigning/lib/SecCode.cpp

   1 /*
   2  * Copyright (c) 2006-2015 Apple Inc. All Rights Reserved.
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   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,
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  18  * Please see the License for the specific language governing rights and
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  23
  24 //
  25 // SecCode - API frame for SecCode objects.
  26 //
  27 // Note that some SecCode* functions take SecStaticCodeRef arguments in order to
  28 // accept either static or dynamic code references, operating on the respective
  29 // StaticCode. Those functions are in SecStaticCode.cpp, not here, despite their name.
  30 //
  31 #include "cs.h"
  32 #include "Code.h"
  33 #include "cskernel.h"
  34 #include <security_utilities/cfmunge.h>
  35 #include <security_utilities/logging.h>
  36
  37 using namespace CodeSigning;
  38
  39
  40 //
  41 // CFError user info keys
  42 //
  43 const CFStringRef kSecCFErrorArchitecture =             CFSTR("SecCSArchitecture");
  44 const CFStringRef kSecCFErrorPattern =                  CFSTR("SecCSPattern");
  45 const CFStringRef kSecCFErrorResourceSeal =             CFSTR("SecCSResourceSeal");
  46 const CFStringRef kSecCFErrorResourceAdded =            CFSTR("SecCSResourceAdded");
  47 const CFStringRef kSecCFErrorResourceAltered =  CFSTR("SecCSResourceAltered");
  48 const CFStringRef kSecCFErrorResourceMissing =  CFSTR("SecCSResourceMissing");
  49 const CFStringRef kSecCFErrorResourceSideband = CFSTR("SecCSResourceHasSidebandData");
  50 const CFStringRef kSecCFErrorInfoPlist =                        CFSTR("SecCSInfoPlist");
  51 const CFStringRef kSecCFErrorGuestAttributes =  CFSTR("SecCSGuestAttributes");
  52 const CFStringRef kSecCFErrorRequirementSyntax = CFSTR("SecRequirementSyntax");
  53 const CFStringRef kSecCFErrorPath =                             CFSTR("SecComponentPath");
  54
  55
  56 //
  57 // CF-standard type code functions
  58 //
  59 CFTypeID SecCodeGetTypeID(void)
  60 {
  61         BEGIN_CSAPI
  62         return gCFObjects().Code.typeID;
  63     END_CSAPI1(_kCFRuntimeNotATypeID)
  64 }
  65
  66
  67 //
  68 // Get a reference to the calling code.
  69 //
  70 OSStatus SecCodeCopySelf(SecCSFlags flags, SecCodeRef *selfRef)
  71 {
  72         BEGIN_CSAPI
  73
  74         checkFlags(flags);
  75         CFRef<CFMutableDictionaryRef> attributes = makeCFMutableDictionary(1,
  76                 kSecGuestAttributePid, CFTempNumber(getpid()).get());
  77         CodeSigning::Required(selfRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
  78
  79         END_CSAPI
  80 }
  81
  82
  83 //
  84 // Get the dynamic status of a code.
  85 //
  86 OSStatus SecCodeGetStatus(SecCodeRef codeRef, SecCSFlags flags, SecCodeStatus *status)
  87 {
  88         BEGIN_CSAPI
  89
  90         checkFlags(flags);
  91         CodeSigning::Required(status) = SecCode::required(codeRef)->status();
  92
  93         END_CSAPI
  94 }
  95
  96
  97 //
  98 // Change the dynamic status of a code
  99 //
 100 OSStatus SecCodeSetStatus(SecCodeRef codeRef, SecCodeStatusOperation operation,
 101         CFDictionaryRef arguments, SecCSFlags flags)
 102 {
 103         BEGIN_CSAPI
 104
 105         checkFlags(flags);
 106         SecCode::required(codeRef)->status(operation, arguments);
 107
 108         END_CSAPI
 109 }
 110
 111
 112 //
 113 // Get the StaticCode for an Code
 114 //
 115 OSStatus SecCodeCopyStaticCode(SecCodeRef codeRef, SecCSFlags flags, SecStaticCodeRef *staticCodeRef)
 116 {
 117         BEGIN_CSAPI
 118
 119         checkFlags(flags, kSecCSUseAllArchitectures);
 120         SecPointer<SecStaticCode> staticCode = SecCode::required(codeRef)->staticCode();
 121         if (flags & kSecCSUseAllArchitectures)
 122                 if (Universal* macho = staticCode->diskRep()->mainExecutableImage())    // Mach-O main executable
 123                         if (macho->narrowed()) {
 124                                 // create a new StaticCode comprising the whole fat file
 125                                 RefPointer<DiskRep> rep = DiskRep::bestGuess(staticCode->diskRep()->mainExecutablePath());
 126                                 staticCode = new SecStaticCode(rep);
 127                         }
 128         CodeSigning::Required(staticCodeRef) = staticCode ? staticCode->handle() : NULL;
 129
 130         END_CSAPI
 131 }
 132
 133
 134 //
 135 // Get the host for an Code
 136 //
 137 OSStatus SecCodeCopyHost(SecCodeRef guestRef, SecCSFlags flags, SecCodeRef *hostRef)
 138 {
 139         BEGIN_CSAPI
 140
 141         checkFlags(flags);
 142         SecPointer<SecCode> host = SecCode::required(guestRef)->host();
 143         CodeSigning::Required(hostRef) = host ? host->handle() : NULL;
 144
 145         END_CSAPI
 146 }
 147
 148
 149 //
 150 // Find a guest by attribute(s)
 151 //
 152 const CFStringRef kSecGuestAttributeCanonical =         CFSTR("canonical");
 153 const CFStringRef kSecGuestAttributeHash =                      CFSTR("codedirectory-hash");
 154 const CFStringRef kSecGuestAttributeMachPort =          CFSTR("mach-port");
 155 const CFStringRef kSecGuestAttributePid =                       CFSTR("pid");
 156 const CFStringRef kSecGuestAttributeAudit =                     CFSTR("audit");
 157 const CFStringRef kSecGuestAttributeDynamicCode =       CFSTR("dynamicCode");
 158 const CFStringRef kSecGuestAttributeDynamicCodeInfoPlist = CFSTR("dynamicCodeInfoPlist");
 159 const CFStringRef kSecGuestAttributeArchitecture =      CFSTR("architecture");
 160 const CFStringRef kSecGuestAttributeSubarchitecture = CFSTR("subarchitecture");
 161
 162 OSStatus SecCodeCopyGuestWithAttributes(SecCodeRef hostRef,
 163         CFDictionaryRef attributes,     SecCSFlags flags, SecCodeRef *guestRef)
 164 {
 165         BEGIN_CSAPI
 166
 167         checkFlags(flags);
 168         if (hostRef) {
 169                 if (SecCode *guest = SecCode::required(hostRef)->locateGuest(attributes))
 170                         CodeSigning::Required(guestRef) = guest->handle(false);
 171                 else
 172                         return errSecCSNoSuchCode;
 173         } else
 174                 CodeSigning::Required(guestRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
 175
 176         END_CSAPI
 177 }
 178
 179
 180 //
 181 // Shorthand for getting the SecCodeRef for a UNIX process
 182 //
 183 OSStatus SecCodeCreateWithPID(pid_t pid, SecCSFlags flags, SecCodeRef *processRef)
 184 {
 185         BEGIN_CSAPI
 186
 187         checkFlags(flags);
 188         if (SecCode *guest = KernelCode::active()->locateGuest(CFTemp<CFDictionaryRef>("{%O=%d}", kSecGuestAttributePid, pid)))
 189                 CodeSigning::Required(processRef) = guest->handle(false);
 190         else
 191                 return errSecCSNoSuchCode;
 192
 193         END_CSAPI
 194 }
 195
 196
 197 //
 198 // Check validity of an Code
 199 //
 200 OSStatus SecCodeCheckValidity(SecCodeRef codeRef, SecCSFlags flags,
 201         SecRequirementRef requirementRef)
 202 {
 203         return SecCodeCheckValidityWithErrors(codeRef, flags, requirementRef, NULL);
 204 }
 205
 206 OSStatus SecCodeCheckValidityWithErrors(SecCodeRef codeRef, SecCSFlags flags,
 207         SecRequirementRef requirementRef, CFErrorRef *errors)
 208 {
 209         BEGIN_CSAPI
 210
 211         checkFlags(flags,
 212                   kSecCSConsiderExpiration
 213                 | kSecCSStrictValidate
 214                 | kSecCSRestrictSidebandData
 215                 | kSecCSEnforceRevocationChecks);
 216         SecPointer<SecCode> code = SecCode::required(codeRef);
 217         code->checkValidity(flags);
 218         if (const SecRequirement *req = SecRequirement::optional(requirementRef))
 219                 code->staticCode()->validateRequirement(req->requirement(), errSecCSReqFailed);
 220
 221         END_CSAPI_ERRORS
 222 }
 223
 224
 225 //
 226 // Collect suitably laundered information about the code signature of a SecStaticCode
 227 // and return it as a CFDictionary.
 228 //
 229 // This API contracts to return a few pieces of information even for unsigned
 230 // code. This means that a SecStaticCodeRef is usable as a basic indentifier
 231 // (i.e. handle) for any code out there.
 232 //
 233 const CFStringRef kSecCodeInfoCertificates =    CFSTR("certificates");
 234 const CFStringRef kSecCodeInfoChangedFiles =    CFSTR("changed-files");
 235 const CFStringRef kSecCodeInfoCMS =                             CFSTR("cms");
 236 const CFStringRef kSecCodeInfoDesignatedRequirement = CFSTR("designated-requirement");
 237 const CFStringRef kSecCodeInfoEntitlements =    CFSTR("entitlements");
 238 const CFStringRef kSecCodeInfoEntitlementsDict =        CFSTR("entitlements-dict");
 239 const CFStringRef kSecCodeInfoFlags =                   CFSTR("flags");
 240 const CFStringRef kSecCodeInfoFormat =                  CFSTR("format");
 241 const CFStringRef kSecCodeInfoDigestAlgorithm = CFSTR("digest-algorithm");
 242 const CFStringRef kSecCodeInfoDigestAlgorithms = CFSTR("digest-algorithms");
 243 const CFStringRef kSecCodeInfoPlatformIdentifier = CFSTR("platform-identifier");
 244 const CFStringRef kSecCodeInfoIdentifier =              CFSTR("identifier");
 245 const CFStringRef kSecCodeInfoImplicitDesignatedRequirement = CFSTR("implicit-requirement");
 246 const CFStringRef kSecCodeInfoMainExecutable =  CFSTR("main-executable");
 247 const CFStringRef kSecCodeInfoPList =                   CFSTR("info-plist");
 248 const CFStringRef kSecCodeInfoRequirements =    CFSTR("requirements");
 249 const CFStringRef kSecCodeInfoRequirementData = CFSTR("requirement-data");
 250 const CFStringRef kSecCodeInfoSource =                  CFSTR("source");
 251 const CFStringRef kSecCodeInfoStatus =                  CFSTR("status");
 252 const CFStringRef kSecCodeInfoTeamIdentifier =  CFSTR("teamid");
 253 const CFStringRef kSecCodeInfoTime =                    CFSTR("signing-time");
 254 const CFStringRef kSecCodeInfoTimestamp =               CFSTR("signing-timestamp");
 255 const CFStringRef kSecCodeInfoTrust =                   CFSTR("trust");
 256 const CFStringRef kSecCodeInfoUnique =                  CFSTR("unique");
 257 const CFStringRef kSecCodeInfoCdHashes =        CFSTR("cdhashes");
 258
 259
 260 const CFStringRef kSecCodeInfoCodeDirectory =   CFSTR("CodeDirectory");
 261 const CFStringRef kSecCodeInfoCodeOffset =              CFSTR("CodeOffset");
 262 const CFStringRef kSecCodeInfoDiskRepInfo =     CFSTR("DiskRepInfo");
 263 const CFStringRef kSecCodeInfoResourceDirectory = CFSTR("ResourceDirectory");
 264
 265 /* DiskInfoRepInfo types */
 266 const CFStringRef kSecCodeInfoDiskRepOSPlatform =          CFSTR("OSPlatform");
 267 const CFStringRef kSecCodeInfoDiskRepOSVersionMin =        CFSTR("OSVersionMin");
 268 const CFStringRef kSecCodeInfoDiskRepOSSDKVersion =        CFSTR("SDKVersion");
 269 const CFStringRef kSecCodeInfoDiskRepNoLibraryValidation = CFSTR("NoLibraryValidation");
 270
 271
 272 OSStatus SecCodeCopySigningInformation(SecStaticCodeRef codeRef, SecCSFlags flags,
 273         CFDictionaryRef *infoRef)
 274 {
 275         BEGIN_CSAPI
 276
 277         checkFlags(flags,
 278                   kSecCSInternalInformation
 279                 | kSecCSSigningInformation
 280                 | kSecCSRequirementInformation
 281                 | kSecCSDynamicInformation
 282                 | kSecCSContentInformation
 283         | kSecCSSkipResourceDirectory);
 284
 285         SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(codeRef);
 286         CFRef<CFDictionaryRef> info = code->signingInformation(flags);
 287
 288         if (flags & kSecCSDynamicInformation)
 289                 if (SecPointer<SecCode> dcode = SecStaticCode::optionalDynamic(codeRef))
 290                         info.take(cfmake<CFDictionaryRef>("{+%O,%O=%u}", info.get(), kSecCodeInfoStatus, dcode->status()));
 291
 292         CodeSigning::Required(infoRef) = info.yield();
 293
 294         END_CSAPI
 295 }