OSX/libsecurity_keychain/lib/SecAccess.cpp

   1 /*
   2  * Copyright (c) 2002-2004,2011-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   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,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <Security/SecBase.h>
  25 #include <Security/SecAccess.h>
  26 #include <Security/SecAccessPriv.h>
  27 #include <Security/SecTrustedApplication.h>
  28 #include <Security/SecTrustedApplicationPriv.h>
  29 #include <security_keychain/Access.h>
  30 #include <security_utilities/casts.h>
  31 #include <utilities/SecCFRelease.h>
  32 #include "SecBridge.h"
  33 #include <sys/param.h>
  34
  35 #include <utilities/SecCFWrappers.h>
  36
  37
  38 /* No restrictions. Permission to perform all operations on
  39    the resource or available to an ACL owner.  */
  40
  41
  42 const CFStringRef kSecACLAuthorizationAny = CFSTR("ACLAuthorizationAny");
  43
  44 const CFStringRef kSecACLAuthorizationLogin = CFSTR("ACLAuthorizationLogin");
  45 const CFStringRef kSecACLAuthorizationGenKey = CFSTR("ACLAuthorizationGenKey");
  46 const CFStringRef kSecACLAuthorizationDelete = CFSTR("ACLAuthorizationDelete");
  47 const CFStringRef kSecACLAuthorizationExportWrapped = CFSTR("ACLAuthorizationExportWrapped");
  48 const CFStringRef kSecACLAuthorizationExportClear = CFSTR("ACLAuthorizationExportClear");
  49 const CFStringRef kSecACLAuthorizationImportWrapped = CFSTR("ACLAuthorizationImportWrapped");
  50 const CFStringRef kSecACLAuthorizationImportClear = CFSTR("ACLAuthorizationImportClear");
  51 const CFStringRef kSecACLAuthorizationSign = CFSTR("ACLAuthorizationSign");
  52 const CFStringRef kSecACLAuthorizationEncrypt = CFSTR("ACLAuthorizationEncrypt");
  53 const CFStringRef kSecACLAuthorizationDecrypt = CFSTR("ACLAuthorizationDecrypt");
  54 const CFStringRef kSecACLAuthorizationMAC = CFSTR("ACLAuthorizationMAC");
  55 const CFStringRef kSecACLAuthorizationDerive = CFSTR("ACLAuthorizationDerive");
  56
  57 /* Defined authorization tag values for Keychain */
  58
  59
  60
  61 const CFStringRef kSecACLAuthorizationKeychainCreate = CFSTR("ACLAuthorizationKeychainCreate");
  62 const CFStringRef kSecACLAuthorizationKeychainDelete = CFSTR("ACLAuthorizationKeychainDelete");
  63 const CFStringRef kSecACLAuthorizationKeychainItemRead = CFSTR("ACLAuthorizationKeychainItemRead");
  64 const CFStringRef kSecACLAuthorizationKeychainItemInsert = CFSTR("ACLAuthorizationKeychainItemInsert");
  65 const CFStringRef kSecACLAuthorizationKeychainItemModify = CFSTR("ACLAuthorizationKeychainItemModify");
  66 const CFStringRef kSecACLAuthorizationKeychainItemDelete = CFSTR("ACLAuthorizationKeychainItemDelete");
  67
  68 const CFStringRef kSecACLAuthorizationChangeACL = CFSTR("ACLAuthorizationChangeACL");
  69 const CFStringRef kSecACLAuthorizationChangeOwner = CFSTR("ACLAuthorizationChangeOwner");
  70 const CFStringRef kSecACLAuthorizationPartitionID = CFSTR("ACLAuthorizationPartitionID");
  71 const CFStringRef kSecACLAuthorizationIntegrity = CFSTR("ACLAuthorizationIntegrity");
  72
  73
  74 static CFArrayRef copyTrustedAppListFromBundle(CFStringRef bundlePath, CFStringRef trustedAppListFileName);
  75
  76 static CFStringRef gKeys[] =
  77 {
  78         kSecACLAuthorizationAny,
  79         kSecACLAuthorizationLogin,
  80         kSecACLAuthorizationGenKey,
  81         kSecACLAuthorizationDelete,
  82         kSecACLAuthorizationExportWrapped,
  83         kSecACLAuthorizationExportClear,
  84         kSecACLAuthorizationImportWrapped,
  85         kSecACLAuthorizationImportClear,
  86         kSecACLAuthorizationSign,
  87         kSecACLAuthorizationEncrypt,
  88         kSecACLAuthorizationDecrypt,
  89         kSecACLAuthorizationMAC,
  90         kSecACLAuthorizationDerive,
  91
  92         /* Defined authorization tag values for Keychain */
  93         kSecACLAuthorizationKeychainCreate,
  94         kSecACLAuthorizationKeychainDelete,
  95         kSecACLAuthorizationKeychainItemRead,
  96         kSecACLAuthorizationKeychainItemInsert,
  97         kSecACLAuthorizationKeychainItemModify,
  98         kSecACLAuthorizationKeychainItemDelete,
  99
 100         kSecACLAuthorizationChangeACL,
 101         kSecACLAuthorizationChangeOwner,
 102     kSecACLAuthorizationPartitionID,
 103     kSecACLAuthorizationIntegrity
 104 };
 105
 106 static sint32 gValues[] =
 107 {
 108         CSSM_ACL_AUTHORIZATION_ANY,
 109         CSSM_ACL_AUTHORIZATION_LOGIN,
 110         CSSM_ACL_AUTHORIZATION_GENKEY,
 111         CSSM_ACL_AUTHORIZATION_DELETE,
 112         CSSM_ACL_AUTHORIZATION_EXPORT_WRAPPED,
 113         CSSM_ACL_AUTHORIZATION_EXPORT_CLEAR,
 114         CSSM_ACL_AUTHORIZATION_IMPORT_WRAPPED,
 115         CSSM_ACL_AUTHORIZATION_IMPORT_CLEAR,
 116         CSSM_ACL_AUTHORIZATION_SIGN,
 117         CSSM_ACL_AUTHORIZATION_ENCRYPT,
 118         CSSM_ACL_AUTHORIZATION_DECRYPT,
 119         CSSM_ACL_AUTHORIZATION_MAC,
 120         CSSM_ACL_AUTHORIZATION_DERIVE,
 121         CSSM_ACL_AUTHORIZATION_DBS_CREATE,
 122         CSSM_ACL_AUTHORIZATION_DBS_DELETE,
 123         CSSM_ACL_AUTHORIZATION_DB_READ,
 124         CSSM_ACL_AUTHORIZATION_DB_INSERT,
 125         CSSM_ACL_AUTHORIZATION_DB_MODIFY,
 126         CSSM_ACL_AUTHORIZATION_DB_DELETE,
 127         CSSM_ACL_AUTHORIZATION_CHANGE_ACL,
 128         CSSM_ACL_AUTHORIZATION_CHANGE_OWNER,
 129     CSSM_ACL_AUTHORIZATION_PARTITION_ID,
 130     CSSM_ACL_AUTHORIZATION_INTEGRITY
 131 };
 132
 133 static
 134 CFDictionaryRef CreateStringToNumDictionary()
 135 {
 136         int numItems = (sizeof(gValues) / sizeof(sint32));
 137         CFMutableDictionaryRef tempDict = CFDictionaryCreateMutable(kCFAllocatorDefault, numItems, &kCFCopyStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 138
 139         for (int iCnt = 0; iCnt < numItems; iCnt++)
 140         {
 141                 sint32 aNumber = gValues[iCnt];
 142                 CFNumberRef aNum = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &aNumber);
 143
 144                 CFStringRef aString = gKeys[iCnt];
 145                 CFDictionaryAddValue(tempDict, aString, aNum);
 146                 CFRelease(aNum);
 147         }
 148
 149         CFDictionaryRef result = CFDictionaryCreateCopy(kCFAllocatorDefault, tempDict);
 150         CFRelease(tempDict);
 151         return result;
 152
 153 }
 154
 155 static
 156 CFDictionaryRef CreateNumToStringDictionary()
 157 {
 158         int numItems = (sizeof(gValues) / sizeof(sint32));
 159
 160         CFMutableDictionaryRef tempDict = CFDictionaryCreateMutable(kCFAllocatorDefault, numItems, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 161
 162         for (int iCnt = 0; iCnt < numItems; iCnt++)
 163         {
 164                 sint32 aNumber = gValues[iCnt];
 165                 CFNumberRef aNum = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &aNumber);
 166
 167                 CFStringRef aString = gKeys[iCnt];
 168                 CFDictionaryAddValue(tempDict, aNum, aString);
 169                 CFRelease(aNum);
 170
 171         }
 172
 173         CFDictionaryRef result = CFDictionaryCreateCopy(kCFAllocatorDefault, tempDict);
 174         CFRelease(tempDict);
 175         return result;
 176 }
 177
 178
 179 /* TODO: This should be in some header */
 180 sint32 GetACLAuthorizationTagFromString(CFStringRef aclStr);
 181 sint32 GetACLAuthorizationTagFromString(CFStringRef aclStr)
 182 {
 183         if (NULL == aclStr)
 184         {
 185 #ifndef NDEBUG
 186                 CFShow(CFSTR("GetACLAuthorizationTagFromString aclStr is NULL"));
 187 #endif
 188                 return 0;
 189         }
 190
 191         static CFDictionaryRef gACLMapping = NULL;
 192
 193         if (NULL == gACLMapping)
 194         {
 195                 gACLMapping = CreateStringToNumDictionary();
 196         }
 197
 198         sint32 result = 0;
 199         CFNumberRef valueResult = (CFNumberRef)CFDictionaryGetValue(gACLMapping, aclStr);
 200         if (NULL != valueResult)
 201         {
 202                 if (!CFNumberGetValue(valueResult, kCFNumberSInt32Type, &result))
 203                 {
 204                         return 0;
 205                 }
 206
 207         }
 208         else
 209         {
 210                 return 0;
 211         }
 212
 213         return result;
 214
 215 }
 216
 217 /* TODO: This should be in some header */
 218 CFStringRef GetAuthStringFromACLAuthorizationTag(sint32 tag);
 219 CFStringRef GetAuthStringFromACLAuthorizationTag(sint32 tag)
 220 {
 221         static CFDictionaryRef gTagMapping = NULL;
 222         CFNumberRef aNum = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &tag);
 223
 224         if (NULL == gTagMapping)
 225         {
 226                 gTagMapping = CreateNumToStringDictionary();
 227         }
 228
 229         CFStringRef result = (CFStringRef)kSecACLAuthorizationAny;
 230
 231         if (NULL != gTagMapping && CFDictionaryContainsKey(gTagMapping, aNum))
 232         {
 233                 result = (CFStringRef)CFDictionaryGetValue(gTagMapping, aNum);
 234         }
 235     CFReleaseSafe(aNum);
 236         return result;
 237 }
 238
 239 //
 240 // CF boilerplate
 241 //
 242 CFTypeID SecAccessGetTypeID(void)
 243 {
 244         BEGIN_SECAPI
 245         return gTypes().Access.typeID;
 246         END_SECAPI1(_kCFRuntimeNotATypeID)
 247 }
 248
 249
 250 //
 251 // API bridge calls
 252 //
 253 /*!
 254  *      Create a new SecAccessRef that is set to the default configuration
 255  *      of a (newly created) security object.
 256  */
 257 OSStatus SecAccessCreate(CFStringRef descriptor, CFArrayRef trustedList, SecAccessRef *accessRef)
 258 {
 259         BEGIN_SECAPI
 260         Required(descriptor);
 261         SecPointer<Access> access;
 262         if (trustedList) {
 263                 CFIndex length = CFArrayGetCount(trustedList);
 264                 ACL::ApplicationList trusted;
 265                 for (CFIndex n = 0; n < length; n++)
 266                         trusted.push_back(TrustedApplication::required(
 267                                 SecTrustedApplicationRef(CFArrayGetValueAtIndex(trustedList, n))));
 268                 access = new Access(cfString(descriptor), trusted);
 269         } else {
 270                 access = new Access(cfString(descriptor));
 271         }
 272         Required(accessRef) = access->handle();
 273         END_SECAPI
 274 }
 275
 276
 277 /*!
 278  */
 279 OSStatus SecAccessCreateFromOwnerAndACL(const CSSM_ACL_OWNER_PROTOTYPE *owner,
 280         uint32 aclCount, const CSSM_ACL_ENTRY_INFO *acls,
 281         SecAccessRef *accessRef)
 282 {
 283         BEGIN_SECAPI
 284         Required(accessRef);    // preflight
 285         SecPointer<Access> access = new Access(Required(owner), aclCount, &Required(acls));
 286         *accessRef = access->handle();
 287         END_SECAPI
 288 }
 289
 290 SecAccessRef SecAccessCreateWithOwnerAndACL(uid_t userId, gid_t groupId, SecAccessOwnerType ownerType, CFArrayRef acls, CFErrorRef *error)
 291 {
 292         SecAccessRef result = NULL;
 293
 294         CSSM_ACL_PROCESS_SUBJECT_SELECTOR selector =
 295         {
 296                 CSSM_ACL_PROCESS_SELECTOR_CURRENT_VERSION,      // selector version
 297                 int_cast<UInt32, uint16>(ownerType),
 298                 userId,
 299                 groupId
 300         };
 301
 302         CSSM_LIST_ELEMENT subject2 = { NULL, 0 };
 303         subject2.Element.Word.Data = (UInt8 *)&selector;
 304         subject2.Element.Word.Length = sizeof(selector);
 305         CSSM_LIST_ELEMENT subject1 =
 306         {
 307                 &subject2, CSSM_ACL_SUBJECT_TYPE_PROCESS, CSSM_LIST_ELEMENT_WORDID
 308         };
 309
 310         CFIndex numAcls = 0;
 311
 312         if (NULL != acls)
 313         {
 314                 numAcls = CFArrayGetCount(acls);
 315         }
 316
 317 #ifndef NDEBUG
 318         CFStringRef debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 319                 CFSTR("SecAccessCreateWithOwnerAndACL: processing %d acls"), (int)numAcls);
 320         CFShow(debugStr);
 321         CFRelease(debugStr);
 322 #endif
 323
 324         std::vector<CSSM_ACL_AUTHORIZATION_TAG> rights(numAcls);
 325
 326         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 327         {
 328                 CFStringRef aclStr = (CFStringRef)CFArrayGetValueAtIndex(acls, iCnt);
 329
 330 #ifndef NDEBUG
 331                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 332                         CFSTR("SecAccessCreateWithOwnerAndACL: acls[%d] = %@"), (int)iCnt, aclStr);
 333
 334                 CFShow(debugStr);
 335                 CFRelease(debugStr);
 336 #endif
 337
 338                 CSSM_ACL_AUTHORIZATION_TAG aTag = GetACLAuthorizationTagFromString(aclStr);
 339
 340 #ifndef NDEBUG
 341                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 342                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d] = %d"), (int)iCnt, aTag);
 343
 344                 CFShow(debugStr);
 345                 CFRelease(debugStr);
 346 #endif
 347
 348                 rights[iCnt] = aTag;
 349         }
 350
 351
 352         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 353         {
 354 #ifndef NDEBUG
 355                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 356                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d]  = %d"), (int)iCnt, rights[iCnt]);
 357
 358                 CFShow(debugStr);
 359                 CFRelease(debugStr);
 360 #endif
 361
 362
 363         }
 364
 365         CSSM_ACL_OWNER_PROTOTYPE owner =
 366         {
 367                 // TypedSubject
 368                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 369                 // Delegate
 370                 false
 371         };
 372
 373
 374         // ACL entries (any number, just one here)
 375         CSSM_ACL_ENTRY_INFO acl_rights[] =
 376         {
 377                 {
 378                         // prototype
 379                         {
 380                                 // TypedSubject
 381                                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 382                                 false,  // Delegate
 383                                 // rights for this entry
 384                                 { (uint32)numAcls, rights.data() },
 385                                 // rest is defaulted
 386                         }
 387                 }
 388         };
 389
 390         OSStatus err = SecAccessCreateFromOwnerAndACL(&owner,
 391                 sizeof(acl_rights) / sizeof(acl_rights[0]), acl_rights, &result);
 392
 393         if (errSecSuccess != err)
 394         {
 395                 result = NULL;
 396                 if (NULL != error)
 397                 {
 398                         *error  = CFErrorCreate(kCFAllocatorDefault, CFSTR("FIX ME"), err, NULL);
 399                 }
 400         }
 401         return result;
 402 }
 403
 404
 405 /*!
 406  */
 407 OSStatus SecAccessGetOwnerAndACL(SecAccessRef accessRef,
 408         CSSM_ACL_OWNER_PROTOTYPE_PTR *owner,
 409         uint32 *aclCount, CSSM_ACL_ENTRY_INFO_PTR *acls)
 410 {
 411         BEGIN_SECAPI
 412         Access::required(accessRef)->copyOwnerAndAcl(
 413                 Required(owner), Required(aclCount), Required(acls));
 414         END_SECAPI
 415 }
 416
 417 OSStatus SecAccessCopyOwnerAndACL(SecAccessRef accessRef, uid_t* userId, gid_t* groupId, SecAccessOwnerType* ownerType, CFArrayRef* aclList)
 418 {
 419         CSSM_ACL_OWNER_PROTOTYPE_PTR owner = NULL;
 420         CSSM_ACL_ENTRY_INFO_PTR acls = NULL;
 421         uint32 aclCount = 0;
 422         OSStatus result = SecAccessGetOwnerAndACL(accessRef, &owner, &aclCount, &acls);
 423         if (errSecSuccess != result )
 424         {
 425                 return result;
 426         }
 427
 428         if (NULL != owner)
 429         {
 430                 CSSM_LIST_ELEMENT_PTR listHead = owner->TypedSubject.Head;
 431                 if (listHead != NULL && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 432                 {
 433                         CSSM_LIST_ELEMENT_PTR nextElement = listHead->NextElement;
 434                         if (listHead->WordID == CSSM_ACL_SUBJECT_TYPE_PROCESS && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 435                         {
 436                                 // nextElement contains the required data
 437                                 CSSM_ACL_PROCESS_SUBJECT_SELECTOR* selectorPtr = (CSSM_ACL_PROCESS_SUBJECT_SELECTOR*)nextElement->Element.Word.Data;
 438                                 if (NULL != selectorPtr)
 439                                 {
 440                                         if (NULL != userId)
 441                                         {
 442                                                 *userId = (uid_t)selectorPtr->uid;
 443                                         }
 444
 445                                         if (NULL != groupId)
 446                                         {
 447                                                 *groupId = (gid_t)selectorPtr->gid;
 448                                         }
 449
 450                                         if (NULL != ownerType)
 451                                         {
 452                                                 *ownerType = (SecAccessOwnerType)selectorPtr->mask;
 453                                         }
 454                                 }
 455                         }
 456
 457                 }
 458
 459         }
 460
 461         if (NULL != aclList)
 462         {
 463 #ifndef NDEBUG
 464                 CFShow(CFSTR("SecAccessCopyOwnerAndACL: processing the ACL list"));
 465 #endif
 466
 467                 CFMutableArrayRef stringArray = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
 468                 CSSM_ACL_OWNER_PROTOTYPE_PTR protoPtr = NULL;
 469                 uint32 numAcls = 0L;
 470                 CSSM_ACL_ENTRY_INFO_PTR aclEntry = NULL;
 471
 472                 result = SecAccessGetOwnerAndACL(accessRef, &protoPtr, &numAcls, &aclEntry);
 473                 if (errSecSuccess == result)
 474                 {
 475 #ifndef NDEBUG
 476                         CFStringRef tempStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("SecAccessCopyOwnerAndACL: numAcls = %d"), numAcls);
 477                         CFShow(tempStr);
 478                         CFRelease(tempStr);
 479 #endif
 480
 481                         for (uint32 iCnt = 0; iCnt < numAcls; iCnt++)
 482                         {
 483                                 CSSM_ACL_ENTRY_PROTOTYPE prototype = aclEntry[iCnt].EntryPublicInfo;
 484                                 CSSM_AUTHORIZATIONGROUP authGroup = prototype.Authorization;
 485                                 int numAuthTags = (int)authGroup.NumberOfAuthTags;
 486
 487                                 for (int jCnt = 0; jCnt < numAuthTags; jCnt++)
 488                                 {
 489
 490                                         sint32 aTag = authGroup.AuthTags[jCnt];
 491                                         CFStringRef aString = GetAuthStringFromACLAuthorizationTag(aTag);
 492
 493                                         CFArrayAppendValue(stringArray, aString);
 494                                 }
 495                         }
 496                 }
 497
 498                 if (NULL != stringArray)
 499                 {
 500                         if (0 < CFArrayGetCount(stringArray))
 501                         {
 502                                 *aclList = CFArrayCreateCopy(kCFAllocatorDefault, stringArray);
 503                         }
 504                         CFRelease(stringArray);
 505                 }
 506         }
 507
 508         return result;
 509 }
 510
 511 /*!
 512  */
 513 OSStatus SecAccessCopyACLList(SecAccessRef accessRef,
 514         CFArrayRef *aclList)
 515 {
 516         BEGIN_SECAPI
 517         Required(aclList) = Access::required(accessRef)->copySecACLs();
 518         END_SECAPI
 519 }
 520
 521
 522 /*!
 523  */
 524 OSStatus SecAccessCopySelectedACLList(SecAccessRef accessRef,
 525         CSSM_ACL_AUTHORIZATION_TAG action,
 526         CFArrayRef *aclList)
 527 {
 528         BEGIN_SECAPI
 529         Required(aclList) = Access::required(accessRef)->copySecACLs(action);
 530         END_SECAPI
 531 }
 532
 533 CFArrayRef SecAccessCopyMatchingACLList(SecAccessRef accessRef, CFTypeRef authorizationTag)
 534 {
 535         CFArrayRef result = NULL;
 536         CSSM_ACL_AUTHORIZATION_TAG tag = GetACLAuthorizationTagFromString((CFStringRef)authorizationTag);
 537         OSStatus err = SecAccessCopySelectedACLList(accessRef, tag, &result);
 538         if (errSecSuccess != err)
 539         {
 540                 result = NULL;
 541         }
 542         return result;
 543 }
 544
 545 CFArrayRef copyTrustedAppListFromBundle(CFStringRef bundlePath, CFStringRef trustedAppListFileName)
 546 {
 547         CFStringRef errorString = nil;
 548     CFURLRef bundleURL,trustedAppsURL = NULL;
 549     CFBundleRef secBundle = NULL;
 550         CFPropertyListRef trustedAppsPlist = NULL;
 551         CFDataRef xmlDataRef = NULL;
 552         SInt32 errorCode;
 553     CFArrayRef trustedAppList = NULL;
 554         CFMutableStringRef trustedAppListFileNameWithoutExtension = NULL;
 555
 556     // Make a CFURLRef from the CFString representation of the bundleÕs path.
 557     bundleURL = CFURLCreateWithFileSystemPath(
 558         kCFAllocatorDefault,bundlePath,kCFURLPOSIXPathStyle,true);
 559
 560         CFRange wholeStrRange;
 561
 562         if (!bundleURL)
 563         goto xit;
 564
 565     // Make a bundle instance using the URLRef.
 566     secBundle = CFBundleCreate(kCFAllocatorDefault,bundleURL);
 567     if (!secBundle)
 568         goto xit;
 569
 570         trustedAppListFileNameWithoutExtension =
 571                 CFStringCreateMutableCopy(NULL,CFStringGetLength(trustedAppListFileName),trustedAppListFileName);
 572         wholeStrRange = CFStringFind(trustedAppListFileName,CFSTR(".plist"),0);
 573
 574         CFStringDelete(trustedAppListFileNameWithoutExtension,wholeStrRange);
 575
 576     // Look for a resource in the bundle by name and type
 577     trustedAppsURL = CFBundleCopyResourceURL(secBundle,trustedAppListFileNameWithoutExtension,CFSTR("plist"),NULL);
 578     if (!trustedAppsURL)
 579         goto xit;
 580
 581         if (!CFURLCreateDataAndPropertiesFromResource(kCFAllocatorDefault,trustedAppsURL,&xmlDataRef,NULL,NULL,&errorCode))
 582         goto xit;
 583
 584         trustedAppsPlist = CFPropertyListCreateFromXMLData(kCFAllocatorDefault,xmlDataRef,kCFPropertyListImmutable,&errorString);
 585     trustedAppList = (CFArrayRef)trustedAppsPlist;
 586
 587 xit:
 588     CFReleaseNull(trustedAppListFileNameWithoutExtension);
 589     if (bundleURL)
 590         CFRelease(bundleURL);
 591     if (secBundle)
 592         CFRelease(secBundle);
 593     if (trustedAppsURL)
 594         CFRelease(trustedAppsURL);
 595     if (xmlDataRef)
 596         CFRelease(xmlDataRef);
 597     if (errorString)
 598         CFRelease(errorString);
 599
 600     return trustedAppList;
 601 }
 602
 603 OSStatus SecAccessCreateWithTrustedApplications(CFStringRef trustedApplicationsPListPath, CFStringRef accessLabel, Boolean allowAny, SecAccessRef* returnedAccess)
 604 {
 605         OSStatus err = errSecSuccess;
 606         SecAccessRef accessToReturn=nil;
 607         CFMutableArrayRef trustedApplications=nil;
 608
 609         if (!allowAny) // use default access ("confirm access")
 610         {
 611                 // make an exception list of applications you want to trust,
 612                 // which are allowed to access the item without requiring user confirmation
 613                 SecTrustedApplicationRef myself=NULL, someOther=NULL;
 614         CFArrayRef trustedAppListFromBundle=NULL;
 615
 616         trustedApplications=CFArrayCreateMutable(kCFAllocatorDefault,0,&kCFTypeArrayCallBacks);
 617         err = SecTrustedApplicationCreateFromPath(NULL, &myself);
 618         if (!err)
 619             CFArrayAppendValue(trustedApplications,myself);
 620
 621                 CFURLRef url = CFURLCreateWithFileSystemPath(NULL, trustedApplicationsPListPath, kCFURLPOSIXPathStyle, 0);
 622                 CFStringRef leafStr = NULL;
 623                 leafStr = CFURLCopyLastPathComponent(url);
 624
 625                 CFURLRef bndlPathURL = NULL;
 626                 bndlPathURL = CFURLCreateCopyDeletingLastPathComponent(NULL, url);
 627                 CFStringRef bndlPath = NULL;
 628                 bndlPath = CFURLCopyFileSystemPath(bndlPathURL, kCFURLPOSIXPathStyle);
 629         trustedAppListFromBundle=copyTrustedAppListFromBundle(bndlPath, leafStr);
 630                 if ( leafStr )
 631                         CFRelease(leafStr);
 632                 if ( bndlPath )
 633                         CFRelease(bndlPath);
 634                 if ( url )
 635                         CFRelease(url);
 636                 if ( bndlPathURL )
 637                         CFRelease(bndlPathURL);
 638         if (trustedAppListFromBundle)
 639         {
 640             CFIndex ix,top;
 641             char buffer[MAXPATHLEN];
 642             top = CFArrayGetCount(trustedAppListFromBundle);
 643             for (ix=0;ix<top;ix++)
 644             {
 645                 CFStringRef filename = (CFStringRef)CFArrayGetValueAtIndex(trustedAppListFromBundle,ix);
 646                 CFIndex stringLength = CFStringGetLength(filename);
 647                 CFIndex usedBufLen;
 648
 649                 if (stringLength != CFStringGetBytes(filename,CFRangeMake(0,stringLength),kCFStringEncodingUTF8,0,
 650                     false,(UInt8 *)&buffer,MAXPATHLEN, &usedBufLen))
 651                     break;
 652                 buffer[usedBufLen] = 0;
 653                                 //
 654                                 // Support specification of trusted applications by either
 655                                 // a full pathname or a code requirement string.
 656                                 //
 657                                 if (buffer[0]=='/')
 658                                 {
 659                                         err = SecTrustedApplicationCreateFromPath(buffer,&someOther);
 660                                 }
 661                                 else
 662                                 {
 663                                         char *buf = NULL;
 664                                         CFStringRef reqStr = filename;
 665                                         CFArrayRef descArray = CFStringCreateArrayBySeparatingStrings(NULL, reqStr, CFSTR("\""));
 666                                         if (descArray && (CFArrayGetCount(descArray) > 1))
 667                                         {
 668                                                 CFStringRef descStr = (CFStringRef) CFArrayGetValueAtIndex(descArray, 1);
 669                                                 if (descStr)
 670                                                         buf = CFStringToCString(descStr);
 671                                         }
 672                                         SecRequirementRef reqRef = NULL;
 673                                         err = SecRequirementCreateWithString(reqStr, kSecCSDefaultFlags, &reqRef);
 674                                         if (!err)
 675                                                 err = SecTrustedApplicationCreateFromRequirement((const char *)buf, reqRef, &someOther);
 676                                         if (buf)
 677                                                 free(buf);
 678                                         CFReleaseSafe(reqRef);
 679                                         CFReleaseSafe(descArray);
 680                                 }
 681                 if (!err)
 682                     CFArrayAppendValue(trustedApplications,someOther);
 683
 684                                 if (someOther)
 685                                         CFReleaseNull(someOther);
 686             }
 687             CFRelease(trustedAppListFromBundle);
 688         }
 689         }
 690
 691         err = SecAccessCreate((CFStringRef)accessLabel, (CFArrayRef)trustedApplications, &accessToReturn);
 692     if (!err)
 693         {
 694                 if (allowAny) // change access to be wide-open for decryption ("always allow access")
 695                 {
 696                         // get the access control list for decryption operations
 697                         CFArrayRef aclList=nil;
 698                         err = SecAccessCopySelectedACLList(accessToReturn, CSSM_ACL_AUTHORIZATION_DECRYPT, &aclList);
 699                         if (!err)
 700                         {
 701                                 // get the first entry in the access control list
 702                                 SecACLRef aclRef=(SecACLRef)CFArrayGetValueAtIndex(aclList, 0);
 703                                 CFArrayRef appList=nil;
 704                                 CFStringRef promptDescription=nil;
 705                                 CSSM_ACL_KEYCHAIN_PROMPT_SELECTOR promptSelector;
 706                                 err = SecACLCopySimpleContents(aclRef, &appList, &promptDescription, &promptSelector);
 707
 708                                 // modify the default ACL to not require the passphrase, and have a nil application list
 709                                 promptSelector.flags &= ~CSSM_ACL_KEYCHAIN_PROMPT_REQUIRE_PASSPHRASE;
 710                                 err = SecACLSetSimpleContents(aclRef, NULL, promptDescription, &promptSelector);
 711
 712                                 if (appList) CFRelease(appList);
 713                                 if (promptDescription) CFRelease(promptDescription);
 714                         }
 715                 }
 716         }
 717         *returnedAccess = accessToReturn;
 718         return err;
 719 }