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         CSSM_ACL_AUTHORIZATION_TAG rights[numAcls];
 325         memset(rights, 0, sizeof(rights));
 326
 327         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 328         {
 329                 CFStringRef aclStr = (CFStringRef)CFArrayGetValueAtIndex(acls, iCnt);
 330
 331 #ifndef NDEBUG
 332                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 333                         CFSTR("SecAccessCreateWithOwnerAndACL: acls[%d] = %@"), (int)iCnt, aclStr);
 334
 335                 CFShow(debugStr);
 336                 CFRelease(debugStr);
 337 #endif
 338
 339                 CSSM_ACL_AUTHORIZATION_TAG aTag = GetACLAuthorizationTagFromString(aclStr);
 340
 341 #ifndef NDEBUG
 342                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 343                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d] = %d"), (int)iCnt, aTag);
 344
 345                 CFShow(debugStr);
 346                 CFRelease(debugStr);
 347 #endif
 348
 349                 rights[iCnt] = aTag;
 350         }
 351
 352
 353         for (CFIndex iCnt = 0; iCnt < numAcls; iCnt++)
 354         {
 355 #ifndef NDEBUG
 356                 debugStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL,
 357                         CFSTR("SecAccessCreateWithOwnerAndACL: rights[%d]  = %d"), (int)iCnt, rights[iCnt]);
 358
 359                 CFShow(debugStr);
 360                 CFRelease(debugStr);
 361 #endif
 362
 363
 364         }
 365
 366         CSSM_ACL_OWNER_PROTOTYPE owner =
 367         {
 368                 // TypedSubject
 369                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 370                 // Delegate
 371                 false
 372         };
 373
 374
 375         // ACL entries (any number, just one here)
 376         CSSM_ACL_ENTRY_INFO acl_rights[] =
 377         {
 378                 {
 379                         // prototype
 380                         {
 381                                 // TypedSubject
 382                                 { CSSM_LIST_TYPE_UNKNOWN, &subject1, &subject2 },
 383                                 false,  // Delegate
 384                                 // rights for this entry
 385                                 { (uint32)(sizeof(rights) / sizeof(rights[0])), rights },
 386                                 // rest is defaulted
 387                         }
 388                 }
 389         };
 390
 391         OSStatus err = SecAccessCreateFromOwnerAndACL(&owner,
 392                 sizeof(acl_rights) / sizeof(acl_rights[0]), acl_rights, &result);
 393
 394         if (errSecSuccess != err)
 395         {
 396                 result = NULL;
 397                 if (NULL != error)
 398                 {
 399                         *error  = CFErrorCreate(kCFAllocatorDefault, CFSTR("FIX ME"), err, NULL);
 400                 }
 401         }
 402         return result;
 403 }
 404
 405
 406 /*!
 407  */
 408 OSStatus SecAccessGetOwnerAndACL(SecAccessRef accessRef,
 409         CSSM_ACL_OWNER_PROTOTYPE_PTR *owner,
 410         uint32 *aclCount, CSSM_ACL_ENTRY_INFO_PTR *acls)
 411 {
 412         BEGIN_SECAPI
 413         Access::required(accessRef)->copyOwnerAndAcl(
 414                 Required(owner), Required(aclCount), Required(acls));
 415         END_SECAPI
 416 }
 417
 418 OSStatus SecAccessCopyOwnerAndACL(SecAccessRef accessRef, uid_t* userId, gid_t* groupId, SecAccessOwnerType* ownerType, CFArrayRef* aclList)
 419 {
 420         CSSM_ACL_OWNER_PROTOTYPE_PTR owner = NULL;
 421         CSSM_ACL_ENTRY_INFO_PTR acls = NULL;
 422         uint32 aclCount = 0;
 423         OSStatus result = SecAccessGetOwnerAndACL(accessRef, &owner, &aclCount, &acls);
 424         if (errSecSuccess != result )
 425         {
 426                 return result;
 427         }
 428
 429         if (NULL != owner)
 430         {
 431                 CSSM_LIST_ELEMENT_PTR listHead = owner->TypedSubject.Head;
 432                 if (listHead != NULL && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 433                 {
 434                         CSSM_LIST_ELEMENT_PTR nextElement = listHead->NextElement;
 435                         if (listHead->WordID == CSSM_ACL_SUBJECT_TYPE_PROCESS && listHead->ElementType == CSSM_LIST_ELEMENT_WORDID)
 436                         {
 437                                 // nextElement contains the required data
 438                                 CSSM_ACL_PROCESS_SUBJECT_SELECTOR* selectorPtr = (CSSM_ACL_PROCESS_SUBJECT_SELECTOR*)nextElement->Element.Word.Data;
 439                                 if (NULL != selectorPtr)
 440                                 {
 441                                         if (NULL != userId)
 442                                         {
 443                                                 *userId = (uid_t)selectorPtr->uid;
 444                                         }
 445
 446                                         if (NULL != groupId)
 447                                         {
 448                                                 *groupId = (gid_t)selectorPtr->gid;
 449                                         }
 450
 451                                         if (NULL != ownerType)
 452                                         {
 453                                                 *ownerType = (SecAccessOwnerType)selectorPtr->mask;
 454                                         }
 455                                 }
 456                         }
 457
 458                 }
 459
 460         }
 461
 462         if (NULL != aclList)
 463         {
 464 #ifndef NDEBUG
 465                 CFShow(CFSTR("SecAccessCopyOwnerAndACL: processing the ACL list"));
 466 #endif
 467
 468                 CFMutableArrayRef stringArray = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
 469                 CSSM_ACL_OWNER_PROTOTYPE_PTR protoPtr = NULL;
 470                 uint32 numAcls = 0L;
 471                 CSSM_ACL_ENTRY_INFO_PTR aclEntry = NULL;
 472
 473                 result = SecAccessGetOwnerAndACL(accessRef, &protoPtr, &numAcls, &aclEntry);
 474                 if (errSecSuccess == result)
 475                 {
 476 #ifndef NDEBUG
 477                         CFStringRef tempStr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("SecAccessCopyOwnerAndACL: numAcls = %d"), numAcls);
 478                         CFShow(tempStr);
 479                         CFRelease(tempStr);
 480 #endif
 481
 482                         for (uint32 iCnt = 0; iCnt < numAcls; iCnt++)
 483                         {
 484                                 CSSM_ACL_ENTRY_PROTOTYPE prototype = aclEntry[iCnt].EntryPublicInfo;
 485                                 CSSM_AUTHORIZATIONGROUP authGroup = prototype.Authorization;
 486                                 int numAuthTags = (int)authGroup.NumberOfAuthTags;
 487
 488                                 for (int jCnt = 0; jCnt < numAuthTags; jCnt++)
 489                                 {
 490
 491                                         sint32 aTag = authGroup.AuthTags[jCnt];
 492                                         CFStringRef aString = GetAuthStringFromACLAuthorizationTag(aTag);
 493
 494                                         CFArrayAppendValue(stringArray, aString);
 495                                 }
 496                         }
 497                 }
 498
 499                 if (NULL != stringArray)
 500                 {
 501                         if (0 < CFArrayGetCount(stringArray))
 502                         {
 503                                 *aclList = CFArrayCreateCopy(kCFAllocatorDefault, stringArray);
 504                         }
 505                         CFRelease(stringArray);
 506                 }
 507         }
 508
 509         return result;
 510 }
 511
 512 /*!
 513  */
 514 OSStatus SecAccessCopyACLList(SecAccessRef accessRef,
 515         CFArrayRef *aclList)
 516 {
 517         BEGIN_SECAPI
 518         Required(aclList) = Access::required(accessRef)->copySecACLs();
 519         END_SECAPI
 520 }
 521
 522
 523 /*!
 524  */
 525 OSStatus SecAccessCopySelectedACLList(SecAccessRef accessRef,
 526         CSSM_ACL_AUTHORIZATION_TAG action,
 527         CFArrayRef *aclList)
 528 {
 529         BEGIN_SECAPI
 530         Required(aclList) = Access::required(accessRef)->copySecACLs(action);
 531         END_SECAPI
 532 }
 533
 534 CFArrayRef SecAccessCopyMatchingACLList(SecAccessRef accessRef, CFTypeRef authorizationTag)
 535 {
 536         CFArrayRef result = NULL;
 537         CSSM_ACL_AUTHORIZATION_TAG tag = GetACLAuthorizationTagFromString((CFStringRef)authorizationTag);
 538         OSStatus err = SecAccessCopySelectedACLList(accessRef, tag, &result);
 539         if (errSecSuccess != err)
 540         {
 541                 result = NULL;
 542         }
 543         return result;
 544 }
 545
 546 CFArrayRef copyTrustedAppListFromBundle(CFStringRef bundlePath, CFStringRef trustedAppListFileName)
 547 {
 548         CFStringRef errorString = nil;
 549     CFURLRef bundleURL,trustedAppsURL = NULL;
 550     CFBundleRef secBundle = NULL;
 551         CFPropertyListRef trustedAppsPlist = NULL;
 552         CFDataRef xmlDataRef = NULL;
 553         SInt32 errorCode;
 554     CFArrayRef trustedAppList = NULL;
 555         CFMutableStringRef trustedAppListFileNameWithoutExtension = NULL;
 556
 557     // Make a CFURLRef from the CFString representation of the bundleÕs path.
 558     bundleURL = CFURLCreateWithFileSystemPath(
 559         kCFAllocatorDefault,bundlePath,kCFURLPOSIXPathStyle,true);
 560
 561         CFRange wholeStrRange;
 562
 563         if (!bundleURL)
 564         goto xit;
 565
 566     // Make a bundle instance using the URLRef.
 567     secBundle = CFBundleCreate(kCFAllocatorDefault,bundleURL);
 568     if (!secBundle)
 569         goto xit;
 570
 571         trustedAppListFileNameWithoutExtension =
 572                 CFStringCreateMutableCopy(NULL,CFStringGetLength(trustedAppListFileName),trustedAppListFileName);
 573         wholeStrRange = CFStringFind(trustedAppListFileName,CFSTR(".plist"),0);
 574
 575         CFStringDelete(trustedAppListFileNameWithoutExtension,wholeStrRange);
 576
 577     // Look for a resource in the bundle by name and type
 578     trustedAppsURL = CFBundleCopyResourceURL(secBundle,trustedAppListFileNameWithoutExtension,CFSTR("plist"),NULL);
 579     if (!trustedAppsURL)
 580         goto xit;
 581
 582     if ( trustedAppListFileNameWithoutExtension )
 583                 CFRelease(trustedAppListFileNameWithoutExtension);
 584
 585         if (!CFURLCreateDataAndPropertiesFromResource(kCFAllocatorDefault,trustedAppsURL,&xmlDataRef,NULL,NULL,&errorCode))
 586         goto xit;
 587
 588         trustedAppsPlist = CFPropertyListCreateFromXMLData(kCFAllocatorDefault,xmlDataRef,kCFPropertyListImmutable,&errorString);
 589     trustedAppList = (CFArrayRef)trustedAppsPlist;
 590
 591 xit:
 592     if (bundleURL)
 593         CFRelease(bundleURL);
 594     if (secBundle)
 595         CFRelease(secBundle);
 596     if (trustedAppsURL)
 597         CFRelease(trustedAppsURL);
 598     if (xmlDataRef)
 599         CFRelease(xmlDataRef);
 600     if (errorString)
 601         CFRelease(errorString);
 602
 603     return trustedAppList;
 604 }
 605
 606 OSStatus SecAccessCreateWithTrustedApplications(CFStringRef trustedApplicationsPListPath, CFStringRef accessLabel, Boolean allowAny, SecAccessRef* returnedAccess)
 607 {
 608         OSStatus err = errSecSuccess;
 609         SecAccessRef accessToReturn=nil;
 610         CFMutableArrayRef trustedApplications=nil;
 611
 612         if (!allowAny) // use default access ("confirm access")
 613         {
 614                 // make an exception list of applications you want to trust,
 615                 // which are allowed to access the item without requiring user confirmation
 616                 SecTrustedApplicationRef myself=NULL, someOther=NULL;
 617         CFArrayRef trustedAppListFromBundle=NULL;
 618
 619         trustedApplications=CFArrayCreateMutable(kCFAllocatorDefault,0,&kCFTypeArrayCallBacks);
 620         err = SecTrustedApplicationCreateFromPath(NULL, &myself);
 621         if (!err)
 622             CFArrayAppendValue(trustedApplications,myself);
 623
 624                 CFURLRef url = CFURLCreateWithFileSystemPath(NULL, trustedApplicationsPListPath, kCFURLPOSIXPathStyle, 0);
 625                 CFStringRef leafStr = NULL;
 626                 leafStr = CFURLCopyLastPathComponent(url);
 627
 628                 CFURLRef bndlPathURL = NULL;
 629                 bndlPathURL = CFURLCreateCopyDeletingLastPathComponent(NULL, url);
 630                 CFStringRef bndlPath = NULL;
 631                 bndlPath = CFURLCopyFileSystemPath(bndlPathURL, kCFURLPOSIXPathStyle);
 632         trustedAppListFromBundle=copyTrustedAppListFromBundle(bndlPath, leafStr);
 633                 if ( leafStr )
 634                         CFRelease(leafStr);
 635                 if ( bndlPath )
 636                         CFRelease(bndlPath);
 637                 if ( url )
 638                         CFRelease(url);
 639                 if ( bndlPathURL )
 640                         CFRelease(bndlPathURL);
 641         if (trustedAppListFromBundle)
 642         {
 643             CFIndex ix,top;
 644             char buffer[MAXPATHLEN];
 645             top = CFArrayGetCount(trustedAppListFromBundle);
 646             for (ix=0;ix<top;ix++)
 647             {
 648                 CFStringRef filename = (CFStringRef)CFArrayGetValueAtIndex(trustedAppListFromBundle,ix);
 649                 CFIndex stringLength = CFStringGetLength(filename);
 650                 CFIndex usedBufLen;
 651
 652                 if (stringLength != CFStringGetBytes(filename,CFRangeMake(0,stringLength),kCFStringEncodingUTF8,0,
 653                     false,(UInt8 *)&buffer,MAXPATHLEN, &usedBufLen))
 654                     break;
 655                 buffer[usedBufLen] = 0;
 656                                 //
 657                                 // Support specification of trusted applications by either
 658                                 // a full pathname or a code requirement string.
 659                                 //
 660                                 if (buffer[0]=='/')
 661                                 {
 662                                         err = SecTrustedApplicationCreateFromPath(buffer,&someOther);
 663                                 }
 664                                 else
 665                                 {
 666                                         char *buf = NULL;
 667                                         CFStringRef reqStr = filename;
 668                                         CFArrayRef descArray = CFStringCreateArrayBySeparatingStrings(NULL, reqStr, CFSTR("\""));
 669                                         if (descArray && (CFArrayGetCount(descArray) > 1))
 670                                         {
 671                                                 CFStringRef descStr = (CFStringRef) CFArrayGetValueAtIndex(descArray, 1);
 672                                                 if (descStr)
 673                                                         buf = CFStringToCString(descStr);
 674                                         }
 675                                         SecRequirementRef reqRef = NULL;
 676                                         err = SecRequirementCreateWithString(reqStr, kSecCSDefaultFlags, &reqRef);
 677                                         if (!err)
 678                                                 err = SecTrustedApplicationCreateFromRequirement((const char *)buf, reqRef, &someOther);
 679                                         if (buf)
 680                                                 free(buf);
 681                                         CFReleaseSafe(reqRef);
 682                                         CFReleaseSafe(descArray);
 683                                 }
 684                 if (!err)
 685                     CFArrayAppendValue(trustedApplications,someOther);
 686
 687                                 if (someOther)
 688                                         CFReleaseNull(someOther);
 689             }
 690             CFRelease(trustedAppListFromBundle);
 691         }
 692         }
 693
 694         err = SecAccessCreate((CFStringRef)accessLabel, (CFArrayRef)trustedApplications, &accessToReturn);
 695     if (!err)
 696         {
 697                 if (allowAny) // change access to be wide-open for decryption ("always allow access")
 698                 {
 699                         // get the access control list for decryption operations
 700                         CFArrayRef aclList=nil;
 701                         err = SecAccessCopySelectedACLList(accessToReturn, CSSM_ACL_AUTHORIZATION_DECRYPT, &aclList);
 702                         if (!err)
 703                         {
 704                                 // get the first entry in the access control list
 705                                 SecACLRef aclRef=(SecACLRef)CFArrayGetValueAtIndex(aclList, 0);
 706                                 CFArrayRef appList=nil;
 707                                 CFStringRef promptDescription=nil;
 708                                 CSSM_ACL_KEYCHAIN_PROMPT_SELECTOR promptSelector;
 709                                 err = SecACLCopySimpleContents(aclRef, &appList, &promptDescription, &promptSelector);
 710
 711                                 // modify the default ACL to not require the passphrase, and have a nil application list
 712                                 promptSelector.flags &= ~CSSM_ACL_KEYCHAIN_PROMPT_REQUIRE_PASSPHRASE;
 713                                 err = SecACLSetSimpleContents(aclRef, NULL, promptDescription, &promptSelector);
 714
 715                                 if (appList) CFRelease(appList);
 716                                 if (promptDescription) CFRelease(promptDescription);
 717                         }
 718                 }
 719         }
 720         *returnedAccess = accessToReturn;
 721         return err;
 722 }