libsecurity_codesigning/lib/SecCode.cpp

   1 /*
   2  * Copyright (c) 2006-2010 Apple Inc. All Rights Reserved.
   3  *
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   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 const CFStringRef kSecCFErrorPath =                             CFSTR("SecComponentPath");
  52
  53
  54 //
  55 // CF-standard type code functions
  56 //
  57 CFTypeID SecCodeGetTypeID(void)
  58 {
  59         BEGIN_CSAPI
  60         return gCFObjects().Code.typeID;
  61     END_CSAPI1(_kCFRuntimeNotATypeID)
  62 }
  63
  64
  65 //
  66 // Get a reference to the calling code.
  67 //
  68 OSStatus SecCodeCopySelf(SecCSFlags flags, SecCodeRef *selfRef)
  69 {
  70         BEGIN_CSAPI
  71
  72         checkFlags(flags);
  73         CFRef<CFMutableDictionaryRef> attributes = makeCFMutableDictionary(1,
  74                 kSecGuestAttributePid, CFTempNumber(getpid()).get());
  75         CodeSigning::Required(selfRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
  76
  77         END_CSAPI
  78 }
  79
  80
  81 //
  82 // Get the dynamic status of a code.
  83 //
  84 OSStatus SecCodeGetStatus(SecCodeRef codeRef, SecCSFlags flags, SecCodeStatus *status)
  85 {
  86         BEGIN_CSAPI
  87
  88         checkFlags(flags);
  89         CodeSigning::Required(status) = SecCode::required(codeRef)->status();
  90
  91         END_CSAPI
  92 }
  93
  94
  95 //
  96 // Change the dynamic status of a code
  97 //
  98 OSStatus SecCodeSetStatus(SecCodeRef codeRef, SecCodeStatusOperation operation,
  99         CFDictionaryRef arguments, SecCSFlags flags)
 100 {
 101         BEGIN_CSAPI
 102
 103         checkFlags(flags);
 104         SecCode::required(codeRef)->status(operation, arguments);
 105
 106         END_CSAPI
 107 }
 108
 109
 110 //
 111 // Get the StaticCode for an Code
 112 //
 113 OSStatus SecCodeCopyStaticCode(SecCodeRef codeRef, SecCSFlags flags, SecStaticCodeRef *staticCodeRef)
 114 {
 115         BEGIN_CSAPI
 116
 117         checkFlags(flags);
 118         SecPointer<SecStaticCode> staticCode = SecCode::required(codeRef)->staticCode();
 119         CodeSigning::Required(staticCodeRef) = staticCode ? staticCode->handle() : NULL;
 120
 121         END_CSAPI
 122 }
 123
 124
 125 //
 126 // Get the host for an Code
 127 //
 128 OSStatus SecCodeCopyHost(SecCodeRef guestRef, SecCSFlags flags, SecCodeRef *hostRef)
 129 {
 130         BEGIN_CSAPI
 131
 132         checkFlags(flags);
 133         SecPointer<SecCode> host = SecCode::required(guestRef)->host();
 134         CodeSigning::Required(hostRef) = host ? host->handle() : NULL;
 135
 136         END_CSAPI
 137 }
 138
 139
 140 //
 141 // Find a guest by attribute(s)
 142 //
 143 const CFStringRef kSecGuestAttributeCanonical =         CFSTR("canonical");
 144 const CFStringRef kSecGuestAttributeHash =                      CFSTR("codedirectory-hash");
 145 const CFStringRef kSecGuestAttributeMachPort =          CFSTR("mach-port");
 146 const CFStringRef kSecGuestAttributePid =                       CFSTR("pid");
 147 const CFStringRef kSecGuestAttributeArchitecture =      CFSTR("architecture");
 148 const CFStringRef kSecGuestAttributeSubarchitecture = CFSTR("subarchitecture");
 149
 150 OSStatus SecCodeCopyGuestWithAttributes(SecCodeRef hostRef,
 151         CFDictionaryRef attributes,     SecCSFlags flags, SecCodeRef *guestRef)
 152 {
 153         BEGIN_CSAPI
 154
 155         checkFlags(flags);
 156         if (hostRef) {
 157                 if (SecCode *guest = SecCode::required(hostRef)->locateGuest(attributes))
 158                         CodeSigning::Required(guestRef) = guest->handle(false);
 159                 else
 160                         return errSecCSNoSuchCode;
 161         } else
 162                 CodeSigning::Required(guestRef) = SecCode::autoLocateGuest(attributes, flags)->handle(false);
 163
 164         END_CSAPI
 165 }
 166
 167
 168 //
 169 // Shorthand for getting the SecCodeRef for a UNIX process
 170 //
 171 OSStatus SecCodeCreateWithPID(pid_t pid, SecCSFlags flags, SecCodeRef *processRef)
 172 {
 173         BEGIN_CSAPI
 174
 175         checkFlags(flags);
 176         if (SecCode *guest = KernelCode::active()->locateGuest(CFTemp<CFDictionaryRef>("{%O=%d}", kSecGuestAttributePid, pid)))
 177                 CodeSigning::Required(processRef) = guest->handle(false);
 178         else
 179                 return errSecCSNoSuchCode;
 180
 181         END_CSAPI
 182 }
 183
 184
 185 //
 186 // Check validity of an Code
 187 //
 188 OSStatus SecCodeCheckValidity(SecCodeRef codeRef, SecCSFlags flags,
 189         SecRequirementRef requirementRef)
 190 {
 191         return SecCodeCheckValidityWithErrors(codeRef, flags, requirementRef, NULL);
 192 }
 193
 194 OSStatus SecCodeCheckValidityWithErrors(SecCodeRef codeRef, SecCSFlags flags,
 195         SecRequirementRef requirementRef, CFErrorRef *errors)
 196 {
 197         BEGIN_CSAPI
 198
 199         checkFlags(flags,
 200                   kSecCSConsiderExpiration
 201                 | kSecCSEnforceRevocationChecks);
 202         SecPointer<SecCode> code = SecCode::required(codeRef);
 203         code->checkValidity(flags);
 204         if (const SecRequirement *req = SecRequirement::optional(requirementRef))
 205                 code->staticCode()->validateRequirement(req->requirement(), errSecCSReqFailed);
 206
 207         END_CSAPI_ERRORS
 208 }
 209
 210
 211 //
 212 // Collect suitably laundered information about the code signature of a SecStaticCode
 213 // and return it as a CFDictionary.
 214 //
 215 // This API contracts to return a few pieces of information even for unsigned
 216 // code. This means that a SecStaticCodeRef is usable as a basic indentifier
 217 // (i.e. handle) for any code out there.
 218 //
 219 const CFStringRef kSecCodeInfoCertificates =    CFSTR("certificates");
 220 const CFStringRef kSecCodeInfoChangedFiles =    CFSTR("changed-files");
 221 const CFStringRef kSecCodeInfoCMS =                             CFSTR("cms");
 222 const CFStringRef kSecCodeInfoDesignatedRequirement = CFSTR("designated-requirement");
 223 const CFStringRef kSecCodeInfoEntitlements =    CFSTR("entitlements");
 224 const CFStringRef kSecCodeInfoEntitlementsDict =        CFSTR("entitlements-dict");
 225 const CFStringRef kSecCodeInfoFormat =                  CFSTR("format");
 226 const CFStringRef kSecCodeInfoDigestAlgorithm = CFSTR("digest-algorithm");
 227 const CFStringRef kSecCodeInfoIdentifier =              CFSTR("identifier");
 228 const CFStringRef kSecCodeInfoImplicitDesignatedRequirement = CFSTR("implicit-requirement");
 229 const CFStringRef kSecCodeInfoMainExecutable =  CFSTR("main-executable");
 230 const CFStringRef kSecCodeInfoPList =                   CFSTR("info-plist");
 231 const CFStringRef kSecCodeInfoRequirements =    CFSTR("requirements");
 232 const CFStringRef kSecCodeInfoRequirementData = CFSTR("requirement-data");
 233 const CFStringRef kSecCodeInfoSource =                  CFSTR("source");
 234 const CFStringRef kSecCodeInfoStatus =                  CFSTR("status");
 235 const CFStringRef kSecCodeInfoTime =                    CFSTR("signing-time");
 236 const CFStringRef kSecCodeInfoTimestamp =               CFSTR("signing-timestamp");
 237 const CFStringRef kSecCodeInfoTrust =                   CFSTR("trust");
 238 const CFStringRef kSecCodeInfoUnique =                  CFSTR("unique");
 239
 240 const CFStringRef kSecCodeInfoCodeDirectory =   CFSTR("CodeDirectory");
 241 const CFStringRef kSecCodeInfoCodeOffset =              CFSTR("CodeOffset");
 242 const CFStringRef kSecCodeInfoResourceDirectory = CFSTR("ResourceDirectory");
 243
 244
 245 OSStatus SecCodeCopySigningInformation(SecStaticCodeRef codeRef, SecCSFlags flags,
 246         CFDictionaryRef *infoRef)
 247 {
 248         BEGIN_CSAPI
 249
 250         checkFlags(flags,
 251                   kSecCSInternalInformation
 252                 | kSecCSSigningInformation
 253                 | kSecCSRequirementInformation
 254                 | kSecCSDynamicInformation
 255                 | kSecCSContentInformation);
 256
 257         SecPointer<SecStaticCode> code = SecStaticCode::requiredStatic(codeRef);
 258         CFRef<CFDictionaryRef> info = code->signingInformation(flags);
 259
 260         if (flags & kSecCSDynamicInformation)
 261                 if (SecPointer<SecCode> dcode = SecStaticCode::optionalDynamic(codeRef))
 262                         info.take(cfmake<CFDictionaryRef>("{+%O,%O=%u}", info.get(), kSecCodeInfoStatus, dcode->status()));
 263
 264         CodeSigning::Required(infoRef) = info.yield();
 265
 266         END_CSAPI
 267 }
 268