lib/SecCode.cpp

   1 /*
   2  * Copyright (c) 2006-2010 Apple Inc. All Rights Reserved.
   3  *
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   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
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   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
  36 using namespace CodeSigning;
  37
  38
  39 //
  40 // CFError user info keys
  41 //
  42 const CFStringRef kSecCFErrorArchitecture =             CFSTR("SecCSArchitecture");
  43 const CFStringRef kSecCFErrorPattern =                  CFSTR("SecCSPattern");
  44 const CFStringRef kSecCFErrorResourceSeal =             CFSTR("SecCSResourceSeal");
  45 const CFStringRef kSecCFErrorResourceAdded =    CFSTR("SecCSResourceAdded");
  46 const CFStringRef kSecCFErrorResourceAltered =  CFSTR("SecCSResourceAltered");
  47 const CFStringRef kSecCFErrorResourceMissing =  CFSTR("SecCSResourceMissing");
  48 const CFStringRef kSecCFErrorInfoPlist =                CFSTR("SecCSInfoPlist");
  49 const CFStringRef kSecCFErrorGuestAttributes =  CFSTR("SecCSGuestAttributes");
  50 const CFStringRef kSecCFErrorRequirementSyntax = CFSTR("SecRequirementSyntax");
  51
  52
  53 //
  54 // CF-standard type code functions
  55 //
  56 CFTypeID SecCodeGetTypeID(void)
  57 {
  58         BEGIN_CSAPI
  59         return gCFObjects().Code.typeID;
  60     END_CSAPI1(_kCFRuntimeNotATypeID)
  61 }
  62
  63
  64 //
  65 // Get a reference to the calling code.
  66 //
  67 OSStatus SecCodeCopySelf(SecCSFlags flags, SecCodeRef *selfRef)
  68 {
  69         BEGIN_CSAPI
  70
  71         checkFlags(flags);
  72         CFRef<CFMutableDictionaryRef> attributes = makeCFMutableDictionary(1,
  73                 kSecGuestAttributePid, CFTempNumber(getpid()).get());
  74         CodeSigning::Required(selfRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
  75
  76         END_CSAPI
  77 }
  78
  79
  80 //
  81 // Get the dynamic status of a code.
  82 //
  83 OSStatus SecCodeGetStatus(SecCodeRef codeRef, SecCSFlags flags, SecCodeStatus *status)
  84 {
  85         BEGIN_CSAPI
  86
  87         checkFlags(flags);
  88         CodeSigning::Required(status) = SecCode::required(codeRef)->status();
  89
  90         END_CSAPI
  91 }
  92
  93
  94 //
  95 // Change the dynamic status of a code
  96 //
  97 OSStatus SecCodeSetStatus(SecCodeRef codeRef, SecCodeStatusOperation operation,
  98         CFDictionaryRef arguments, SecCSFlags flags)
  99 {
 100         BEGIN_CSAPI
 101
 102         checkFlags(flags);
 103         SecCode::required(codeRef)->status(operation, arguments);
 104
 105         END_CSAPI
 106 }
 107
 108
 109 //
 110 // Get the StaticCode for an Code
 111 //
 112 OSStatus SecCodeCopyStaticCode(SecCodeRef codeRef, SecCSFlags flags, SecStaticCodeRef *staticCodeRef)
 113 {
 114         BEGIN_CSAPI
 115
 116         checkFlags(flags);
 117         SecPointer<SecStaticCode> staticCode = SecCode::required(codeRef)->staticCode();
 118         CodeSigning::Required(staticCodeRef) = staticCode ? staticCode->handle() : NULL;
 119
 120         END_CSAPI
 121 }
 122
 123
 124 //
 125 // Get the host for an Code
 126 //
 127 OSStatus SecCodeCopyHost(SecCodeRef guestRef, SecCSFlags flags, SecCodeRef *hostRef)
 128 {
 129         BEGIN_CSAPI
 130
 131         checkFlags(flags);
 132         SecPointer<SecCode> host = SecCode::required(guestRef)->host();
 133         CodeSigning::Required(hostRef) = host ? host->handle() : NULL;
 134
 135         END_CSAPI
 136 }
 137
 138
 139 //
 140 // Find a guest by attribute(s)
 141 //
 142 const CFStringRef kSecGuestAttributeCanonical =         CFSTR("canonical");
 143 const CFStringRef kSecGuestAttributeHash =                      CFSTR("codedirectory-hash");
 144 const CFStringRef kSecGuestAttributeMachPort =          CFSTR("mach-port");
 145 const CFStringRef kSecGuestAttributePid =                       CFSTR("pid");
 146 const CFStringRef kSecGuestAttributeArchitecture =      CFSTR("architecture");
 147 const CFStringRef kSecGuestAttributeSubarchitecture = CFSTR("subarchitecture");
 148
 149 OSStatus SecCodeCopyGuestWithAttributes(SecCodeRef hostRef,
 150         CFDictionaryRef attributes,     SecCSFlags flags, SecCodeRef *guestRef)
 151 {
 152         BEGIN_CSAPI
 153
 154         checkFlags(flags);
 155         if (hostRef) {
 156                 if (SecCode *guest = SecCode::required(hostRef)->locateGuest(attributes))
 157                         CodeSigning::Required(guestRef) = guest->handle(false);
 158                 else
 159                         return errSecCSNoSuchCode;
 160         } else
 161                 CodeSigning::Required(guestRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
 162
 163         END_CSAPI
 164 }
 165
 166
 167 //
 168 // Shorthand for getting the SecCodeRef for a UNIX process
 169 //
 170 OSStatus SecCodeCreateWithPID(pid_t pid, SecCSFlags flags, SecCodeRef *processRef)
 171 {
 172         BEGIN_CSAPI
 173
 174         checkFlags(flags);
 175         if (SecCode *guest = KernelCode::active()->locateGuest(CFTemp<CFDictionaryRef>("{%O=%d}", kSecGuestAttributePid, pid)))
 176                 CodeSigning::Required(processRef) = guest->handle(false);
 177         else
 178                 return errSecCSNoSuchCode;
 179
 180         END_CSAPI
 181 }
 182
 183
 184 //
 185 // Check validity of an Code
 186 //
 187 OSStatus SecCodeCheckValidity(SecCodeRef codeRef, SecCSFlags flags,
 188         SecRequirementRef requirementRef)
 189 {
 190         return SecCodeCheckValidityWithErrors(codeRef, flags, requirementRef, NULL);
 191 }
 192
 193 OSStatus SecCodeCheckValidityWithErrors(SecCodeRef codeRef, SecCSFlags flags,
 194         SecRequirementRef requirementRef, CFErrorRef *errors)
 195 {
 196         BEGIN_CSAPI
 197
 198         checkFlags(flags,
 199                 kSecCSConsiderExpiration);
 200         SecPointer<SecCode> code = SecCode::required(codeRef);
 201         code->checkValidity(flags);
 202         if (const SecRequirement *req = SecRequirement::optional(requirementRef))
 203                 code->staticCode()->validateRequirement(req->requirement(), errSecCSReqFailed);
 204
 205         END_CSAPI_ERRORS
 206 }
 207
 208
 209 //
 210 // Collect suitably laundered information about the code signature of a SecStaticCode
 211 // and return it as a CFDictionary.
 212 //
 213 // This API contracts to return a few pieces of information even for unsigned
 214 // code. This means that a SecStaticCodeRef is usable as a basic indentifier
 215 // (i.e. handle) for any code out there.
 216 //
 217 const CFStringRef kSecCodeInfoCertificates =    CFSTR("certificates");
 218 const CFStringRef kSecCodeInfoChangedFiles =    CFSTR("changed-files");
 219 const CFStringRef kSecCodeInfoCMS =                             CFSTR("cms");
 220 const CFStringRef kSecCodeInfoDesignatedRequirement = CFSTR("designated-requirement");
 221 const CFStringRef kSecCodeInfoEntitlements =    CFSTR("entitlements");
 222 const CFStringRef kSecCodeInfoFormat =                  CFSTR("format");
 223 const CFStringRef kSecCodeInfoDigestAlgorithm = CFSTR("digest-algorithm");
 224 const CFStringRef kSecCodeInfoIdentifier =              CFSTR("identifier");
 225 const CFStringRef kSecCodeInfoImplicitDesignatedRequirement = CFSTR("implicit-requirement");
 226 const CFStringRef kSecCodeInfoMainExecutable =  CFSTR("main-executable");
 227 const CFStringRef kSecCodeInfoPList =                   CFSTR("info-plist");
 228 const CFStringRef kSecCodeInfoRequirements =    CFSTR("requirements");
 229 const CFStringRef kSecCodeInfoRequirementData = CFSTR("requirement-data");
 230 const CFStringRef kSecCodeInfoSource =                  CFSTR("source");
 231 const CFStringRef kSecCodeInfoStatus =                  CFSTR("status");
 232 const CFStringRef kSecCodeInfoTime =                    CFSTR("signing-time");
 233 const CFStringRef kSecCodeInfoTrust =                   CFSTR("trust");
 234 const CFStringRef kSecCodeInfoUnique =                  CFSTR("unique");
 235
 236 const CFStringRef kSecCodeInfoCodeDirectory =   CFSTR("CodeDirectory");
 237 const CFStringRef kSecCodeInfoCodeOffset =              CFSTR("CodeOffset");
 238 const CFStringRef kSecCodeInfoResourceDirectory = CFSTR("ResourceDirectory");
 239
 240
 241 OSStatus SecCodeCopySigningInformation(SecStaticCodeRef codeRef, SecCSFlags flags,
 242         CFDictionaryRef *infoRef)
 243 {
 244         BEGIN_CSAPI
 245
 246         checkFlags(flags,
 247                   kSecCSInternalInformation
 248                 | kSecCSSigningInformation
 249                 | kSecCSRequirementInformation
 250                 | kSecCSDynamicInformation
 251                 | kSecCSContentInformation);
 252
 253         SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(codeRef);
 254         CFRef<CFDictionaryRef> info = code->signingInformation(flags);
 255
 256         if (flags & kSecCSDynamicInformation)
 257                 if (SecPointer<SecCode> dcode = SecStaticCode::optionalDynamic(codeRef))
 258                         info = cfmake<CFDictionaryRef>("{+%O,%O=%u}", info.get(),
 259                                 kSecCodeInfoStatus, dcode->status());
 260
 261         CodeSigning::Required(infoRef) = info.yield();
 262
 263         END_CSAPI
 264 }
 265