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 <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     CFIndex rightsSize = numAcls > 0 ? numAcls : 1;
 325
 326         std::vector<CSSM_ACL_AUTHORIZATION_TAG> rights(numAcls);
 327
 328         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 329         {
 330                 CFStringRef aclStr = (CFStringRef)CFArrayGetValueAtIndex(acls, iCnt);
 331
 332 #ifndef NDEBUG
 333                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 334                         CFSTR("SecAccessCreateWithOwnerAndACL: acls[%d] = %@"), (int)iCnt, aclStr);
 335
 336                 CFShow(debugStr);
 337                 CFRelease(debugStr);
 338 #endif
 339
 340                 CSSM_ACL_AUTHORIZATION_TAG aTag = GetACLAuthorizationTagFromString(aclStr);
 341
 342 #ifndef NDEBUG
 343                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 344                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d] = %d"), (int)iCnt, aTag);
 345
 346                 CFShow(debugStr);
 347                 CFRelease(debugStr);
 348 #endif
 349
 350                 rights[iCnt] = aTag;
 351         }
 352
 353
 354         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 355         {
 356 #ifndef NDEBUG
 357                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 358                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d]  = %d"), (int)iCnt, rights[iCnt]);
 359
 360                 CFShow(debugStr);
 361                 CFRelease(debugStr);
 362 #endif
 363
 364
 365         }
 366
 367         CSSM_ACL_OWNER_PROTOTYPE owner =
 368         {
 369                 // TypedSubject
 370                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 371                 // Delegate
 372                 false
 373         };
 374
 375
 376         // ACL entries (any number, just one here)
 377         CSSM_ACL_ENTRY_INFO acl_rights[] =
 378         {
 379                 {
 380                         // prototype
 381                         {
 382                                 // TypedSubject
 383                                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 384                                 false,  // Delegate
 385                                 // rights for this entry
 386                                 { (uint32)numAcls, rights.data() },
 387                                 // rest is defaulted
 388                         }
 389                 }
 390         };
 391
 392         OSStatus err = SecAccessCreateFromOwnerAndACL(&owner,
 393                 sizeof(acl_rights) / sizeof(acl_rights[0]), acl_rights, &result);
 394
 395         if (errSecSuccess != err)
 396         {
 397                 result = NULL;
 398                 if (NULL != error)
 399                 {
 400                         *error  = CFErrorCreate(kCFAllocatorDefault, CFSTR("FIX ME"), err, NULL);
 401                 }
 402         }
 403         return result;
 404 }
 405
 406
 407 /*!
 408  */
 409 OSStatus SecAccessGetOwnerAndACL(SecAccessRef accessRef,
 410         CSSM_ACL_OWNER_PROTOTYPE_PTR *owner,
 411         uint32 *aclCount, CSSM_ACL_ENTRY_INFO_PTR *acls)
 412 {
 413         BEGIN_SECAPI
 414         Access::required(accessRef)->copyOwnerAndAcl(
 415                 Required(owner), Required(aclCount), Required(acls));
 416         END_SECAPI
 417 }
 418
 419 OSStatus SecAccessCopyOwnerAndACL(SecAccessRef accessRef, uid_t* userId, gid_t* groupId, SecAccessOwnerType* ownerType, CFArrayRef* aclList)
 420 {
 421         CSSM_ACL_OWNER_PROTOTYPE_PTR owner = NULL;
 422         CSSM_ACL_ENTRY_INFO_PTR acls = NULL;
 423         uint32 aclCount = 0;
 424         OSStatus result = SecAccessGetOwnerAndACL(accessRef, &owner, &aclCount, &acls);
 425         if (errSecSuccess != result )
 426         {
 427                 return result;
 428         }
 429
 430         if (NULL != owner)
 431         {
 432                 CSSM_LIST_ELEMENT_PTR listHead = owner->TypedSubject.Head;
 433                 if (listHead != NULL && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 434                 {
 435                         CSSM_LIST_ELEMENT_PTR nextElement = listHead->NextElement;
 436                         if (listHead->WordID == CSSM_ACL_SUBJECT_TYPE_PROCESS && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 437                         {
 438                                 // nextElement contains the required data
 439                                 CSSM_ACL_PROCESS_SUBJECT_SELECTOR* selectorPtr = (CSSM_ACL_PROCESS_SUBJECT_SELECTOR*)nextElement->Element.Word.Data;
 440                                 if (NULL != selectorPtr)
 441                                 {
 442                                         if (NULL != userId)
 443                                         {
 444                                                 *userId = (uid_t)selectorPtr->uid;
 445                                         }
 446
 447                                         if (NULL != groupId)
 448                                         {
 449                                                 *groupId = (gid_t)selectorPtr->gid;
 450                                         }
 451
 452                                         if (NULL != ownerType)
 453                                         {
 454                                                 *ownerType = (SecAccessOwnerType)selectorPtr->mask;
 455                                         }
 456                                 }
 457                         }
 458
 459                 }
 460
 461         }
 462
 463         if (NULL != aclList)
 464         {
 465 #ifndef NDEBUG
 466                 CFShow(CFSTR("SecAccessCopyOwnerAndACL: processing the ACL list"));
 467 #endif
 468
 469                 CFMutableArrayRef stringArray = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
 470                 CSSM_ACL_OWNER_PROTOTYPE_PTR protoPtr = NULL;
 471                 uint32 numAcls = 0L;
 472                 CSSM_ACL_ENTRY_INFO_PTR aclEntry = NULL;
 473
 474                 result = SecAccessGetOwnerAndACL(accessRef, &protoPtr, &numAcls, &aclEntry);
 475                 if (errSecSuccess == result)
 476                 {
 477 #ifndef NDEBUG
 478                         CFStringRef tempStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("SecAccessCopyOwnerAndACL: numAcls = %d"), numAcls);
 479                         CFShow(tempStr);
 480                         CFRelease(tempStr);
 481 #endif
 482
 483                         for (uint32 iCnt = 0; iCnt < numAcls; iCnt++)
 484                         {
 485                                 CSSM_ACL_ENTRY_PROTOTYPE prototype = aclEntry[iCnt].EntryPublicInfo;
 486                                 CSSM_AUTHORIZATIONGROUP authGroup = prototype.Authorization;
 487                                 int numAuthTags = (int)authGroup.NumberOfAuthTags;
 488
 489                                 for (int jCnt = 0; jCnt < numAuthTags; jCnt++)
 490                                 {
 491
 492                                         sint32 aTag = authGroup.AuthTags[jCnt];
 493                                         CFStringRef aString = GetAuthStringFromACLAuthorizationTag(aTag);
 494
 495                                         CFArrayAppendValue(stringArray, aString);
 496                                 }
 497                         }
 498                 }
 499
 500                 if (NULL != stringArray)
 501                 {
 502                         if (0 < CFArrayGetCount(stringArray))
 503                         {
 504                                 *aclList = CFArrayCreateCopy(kCFAllocatorDefault, stringArray);
 505                         }
 506                         CFRelease(stringArray);
 507                 }
 508         }
 509
 510         return result;
 511 }
 512
 513 /*!
 514  */
 515 OSStatus SecAccessCopyACLList(SecAccessRef accessRef,
 516         CFArrayRef *aclList)
 517 {
 518         BEGIN_SECAPI
 519         Required(aclList) = Access::required(accessRef)->copySecACLs();
 520         END_SECAPI
 521 }
 522
 523
 524 /*!
 525  */
 526 OSStatus SecAccessCopySelectedACLList(SecAccessRef accessRef,
 527         CSSM_ACL_AUTHORIZATION_TAG action,
 528         CFArrayRef *aclList)
 529 {
 530         BEGIN_SECAPI
 531         Required(aclList) = Access::required(accessRef)->copySecACLs(action);
 532         END_SECAPI
 533 }
 534
 535 CFArrayRef SecAccessCopyMatchingACLList(SecAccessRef accessRef, CFTypeRef authorizationTag)
 536 {
 537         CFArrayRef result = NULL;
 538         CSSM_ACL_AUTHORIZATION_TAG tag = GetACLAuthorizationTagFromString((CFStringRef)authorizationTag);
 539         OSStatus err = SecAccessCopySelectedACLList(accessRef, tag, &result);
 540         if (errSecSuccess != err)
 541         {
 542                 result = NULL;
 543         }
 544         return result;
 545 }
 546
 547 CFArrayRef copyTrustedAppListFromBundle(CFStringRef bundlePath, CFStringRef trustedAppListFileName)
 548 {
 549         CFStringRef errorString = nil;
 550     CFURLRef bundleURL,trustedAppsURL = NULL;
 551     CFBundleRef secBundle = NULL;
 552         CFPropertyListRef trustedAppsPlist = NULL;
 553         CFDataRef xmlDataRef = NULL;
 554         SInt32 errorCode;
 555     CFArrayRef trustedAppList = NULL;
 556         CFMutableStringRef trustedAppListFileNameWithoutExtension = NULL;
 557
 558     // Make a CFURLRef from the CFString representation of the bundleÕs path.
 559     bundleURL = CFURLCreateWithFileSystemPath(
 560         kCFAllocatorDefault,bundlePath,kCFURLPOSIXPathStyle,true);
 561
 562         CFRange wholeStrRange;
 563
 564         if (!bundleURL)
 565         goto xit;
 566
 567     // Make a bundle instance using the URLRef.
 568     secBundle = CFBundleCreate(kCFAllocatorDefault,bundleURL);
 569     if (!secBundle)
 570         goto xit;
 571
 572         trustedAppListFileNameWithoutExtension =
 573                 CFStringCreateMutableCopy(NULL,CFStringGetLength(trustedAppListFileName),trustedAppListFileName);
 574         wholeStrRange = CFStringFind(trustedAppListFileName,CFSTR(".plist"),0);
 575
 576         CFStringDelete(trustedAppListFileNameWithoutExtension,wholeStrRange);
 577
 578     // Look for a resource in the bundle by name and type
 579     trustedAppsURL = CFBundleCopyResourceURL(secBundle,trustedAppListFileNameWithoutExtension,CFSTR("plist"),NULL);
 580     if (!trustedAppsURL)
 581         goto xit;
 582
 583         if (!CFURLCreateDataAndPropertiesFromResource(kCFAllocatorDefault,trustedAppsURL,&xmlDataRef,NULL,NULL,&errorCode))
 584         goto xit;
 585
 586         trustedAppsPlist = CFPropertyListCreateFromXMLData(kCFAllocatorDefault,xmlDataRef,kCFPropertyListImmutable,&errorString);
 587     trustedAppList = (CFArrayRef)trustedAppsPlist;
 588
 589 xit:
 590     CFReleaseNull(trustedAppListFileNameWithoutExtension);
 591     if (bundleURL)
 592         CFRelease(bundleURL);
 593     if (secBundle)
 594         CFRelease(secBundle);
 595     if (trustedAppsURL)
 596         CFRelease(trustedAppsURL);
 597     if (xmlDataRef)
 598         CFRelease(xmlDataRef);
 599     if (errorString)
 600         CFRelease(errorString);
 601
 602     return trustedAppList;
 603 }
 604
 605 OSStatus SecAccessCreateWithTrustedApplications(CFStringRef trustedApplicationsPListPath, CFStringRef accessLabel, Boolean allowAny, SecAccessRef* returnedAccess)
 606 {
 607         OSStatus err = errSecSuccess;
 608         SecAccessRef accessToReturn=nil;
 609         CFMutableArrayRef trustedApplications=nil;
 610
 611         if (!allowAny) // use default access ("confirm access")
 612         {
 613                 // make an exception list of applications you want to trust,
 614                 // which are allowed to access the item without requiring user confirmation
 615                 SecTrustedApplicationRef myself=NULL, someOther=NULL;
 616         CFArrayRef trustedAppListFromBundle=NULL;
 617
 618         trustedApplications=CFArrayCreateMutable(kCFAllocatorDefault,0,&kCFTypeArrayCallBacks);
 619         err = SecTrustedApplicationCreateFromPath(NULL, &myself);
 620         if (!err)
 621             CFArrayAppendValue(trustedApplications,myself);
 622
 623                 CFURLRef url = CFURLCreateWithFileSystemPath(NULL, trustedApplicationsPListPath, kCFURLPOSIXPathStyle, 0);
 624                 CFStringRef leafStr = NULL;
 625                 leafStr = CFURLCopyLastPathComponent(url);
 626
 627                 CFURLRef bndlPathURL = NULL;
 628                 bndlPathURL = CFURLCreateCopyDeletingLastPathComponent(NULL, url);
 629                 CFStringRef bndlPath = NULL;
 630                 bndlPath = CFURLCopyFileSystemPath(bndlPathURL, kCFURLPOSIXPathStyle);
 631         trustedAppListFromBundle=copyTrustedAppListFromBundle(bndlPath, leafStr);
 632                 if ( leafStr )
 633                         CFRelease(leafStr);
 634                 if ( bndlPath )
 635                         CFRelease(bndlPath);
 636                 if ( url )
 637                         CFRelease(url);
 638                 if ( bndlPathURL )
 639                         CFRelease(bndlPathURL);
 640         if (trustedAppListFromBundle)
 641         {
 642             CFIndex ix,top;
 643             char buffer[MAXPATHLEN];
 644             top = CFArrayGetCount(trustedAppListFromBundle);
 645             for (ix=0;ix<top;ix++)
 646             {
 647                 CFStringRef filename = (CFStringRef)CFArrayGetValueAtIndex(trustedAppListFromBundle,ix);
 648                 CFIndex stringLength = CFStringGetLength(filename);
 649                 CFIndex usedBufLen;
 650
 651                 if (stringLength != CFStringGetBytes(filename,CFRangeMake(0,stringLength),kCFStringEncodingUTF8,0,
 652                     false,(UInt8 *)&buffer,MAXPATHLEN, &usedBufLen))
 653                     break;
 654                 buffer[usedBufLen] = 0;
 655                                 //
 656                                 // Support specification of trusted applications by either
 657                                 // a full pathname or a code requirement string.
 658                                 //
 659                                 if (buffer[0]=='/')
 660                                 {
 661                                         err = SecTrustedApplicationCreateFromPath(buffer,&someOther);
 662                                 }
 663                                 else
 664                                 {
 665                                         char *buf = NULL;
 666                                         CFStringRef reqStr = filename;
 667                                         CFArrayRef descArray = CFStringCreateArrayBySeparatingStrings(NULL, reqStr, CFSTR("\""));
 668                                         if (descArray && (CFArrayGetCount(descArray) > 1))
 669                                         {
 670                                                 CFStringRef descStr = (CFStringRef) CFArrayGetValueAtIndex(descArray, 1);
 671                                                 if (descStr)
 672                                                         buf = CFStringToCString(descStr);
 673                                         }
 674                                         SecRequirementRef reqRef = NULL;
 675                                         err = SecRequirementCreateWithString(reqStr, kSecCSDefaultFlags, &reqRef);
 676                                         if (!err)
 677                                                 err = SecTrustedApplicationCreateFromRequirement((const char *)buf, reqRef, &someOther);
 678                                         if (buf)
 679                                                 free(buf);
 680                                         CFReleaseSafe(reqRef);
 681                                         CFReleaseSafe(descArray);
 682                                 }
 683                 if (!err)
 684                     CFArrayAppendValue(trustedApplications,someOther);
 685
 686                                 if (someOther)
 687                                         CFReleaseNull(someOther);
 688             }
 689             CFRelease(trustedAppListFromBundle);
 690         }
 691         }
 692
 693         err = SecAccessCreate((CFStringRef)accessLabel, (CFArrayRef)trustedApplications, &accessToReturn);
 694     if (!err)
 695         {
 696                 if (allowAny) // change access to be wide-open for decryption ("always allow access")
 697                 {
 698                         // get the access control list for decryption operations
 699                         CFArrayRef aclList=nil;
 700                         err = SecAccessCopySelectedACLList(accessToReturn, CSSM_ACL_AUTHORIZATION_DECRYPT, &aclList);
 701                         if (!err)
 702                         {
 703                                 // get the first entry in the access control list
 704                                 SecACLRef aclRef=(SecACLRef)CFArrayGetValueAtIndex(aclList, 0);
 705                                 CFArrayRef appList=nil;
 706                                 CFStringRef promptDescription=nil;
 707                                 CSSM_ACL_KEYCHAIN_PROMPT_SELECTOR promptSelector;
 708                                 err = SecACLCopySimpleContents(aclRef, &appList, &promptDescription, &promptSelector);
 709
 710                                 // modify the default ACL to not require the passphrase, and have a nil application list
 711                                 promptSelector.flags &= ~CSSM_ACL_KEYCHAIN_PROMPT_REQUIRE_PASSPHRASE;
 712                                 err = SecACLSetSimpleContents(aclRef, NULL, promptDescription, &promptSelector);
 713
 714                                 if (appList) CFRelease(appList);
 715                                 if (promptDescription) CFRelease(promptDescription);
 716                         }
 717                 }
 718         }
 719         *returnedAccess = accessToReturn;
 720         return err;
 721 }