Security/libsecurity_cdsa_client/lib/securestorage.cpp

   1 /*
   2  * Copyright (c) 2000-2001,2011-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 #include "securestorage.h"
  20 #include <security_cdsa_client/genkey.h>
  21 //#include <Security/Access.h> //@@@CONV
  22 #include <security_utilities/osxcode.h>
  23 #include <memory>
  24
  25 using namespace CssmClient;
  26 //using namespace KeychainCore;
  27
  28 //
  29 // Manage CSPDL attachments
  30 //
  31 CSPDLImpl::CSPDLImpl(const Guid &guid)
  32 : CSPImpl(Cssm::standard()->autoModule(guid)),
  33 DLImpl(CSPImpl::module())
  34 {
  35 }
  36
  37 CSPDLImpl::CSPDLImpl(const Module &module)
  38 : CSPImpl(module),
  39 DLImpl(module)
  40 {
  41 }
  42
  43 CSPDLImpl::~CSPDLImpl()
  44 try
  45 {
  46 }
  47 catch (...)
  48 {
  49 }
  50
  51 Allocator &CSPDLImpl::allocator() const
  52 {
  53         DLImpl::allocator(); return CSPImpl::allocator();
  54 }
  55
  56 void CSPDLImpl::allocator(Allocator &alloc)
  57 {
  58         CSPImpl::allocator(alloc); DLImpl::allocator(alloc);
  59 }
  60
  61 bool CSPDLImpl::operator <(const CSPDLImpl &other) const
  62 {
  63         return (static_cast<const CSPImpl &>(*this) < static_cast<const CSPImpl &>(other) ||
  64                         (!(static_cast<const CSPImpl &>(other) < static_cast<const CSPImpl &>(*this))
  65                            && static_cast<const DLImpl &>(*this) < static_cast<const DLImpl &>(other)));
  66 }
  67
  68 bool CSPDLImpl::operator ==(const CSPDLImpl &other) const
  69 {
  70         return (static_cast<const CSPImpl &>(*this) == static_cast<const CSPImpl &>(other)
  71                         && static_cast<const DLImpl &>(*this) == static_cast<const DLImpl &>(other));
  72 }
  73
  74 CSSM_SERVICE_MASK CSPDLImpl::subserviceMask() const
  75 {
  76         return CSPImpl::subserviceType() | DLImpl::subserviceType();
  77 }
  78
  79 void CSPDLImpl::subserviceId(uint32 id)
  80 {
  81         CSPImpl::subserviceId(id); DLImpl::subserviceId(id);
  82 }
  83
  84
  85 //
  86 // Secure storage
  87 //
  88 SSCSPDLImpl::SSCSPDLImpl(const Guid &guid) : CSPDLImpl::CSPDLImpl(guid)
  89 {
  90 }
  91
  92 SSCSPDLImpl::SSCSPDLImpl(const Module &module) : CSPDLImpl::CSPDLImpl(module)
  93 {
  94 }
  95
  96 SSCSPDLImpl::~SSCSPDLImpl()
  97 {
  98 }
  99
 100 DbImpl *
 101 SSCSPDLImpl::newDb(const char *inDbName, const CSSM_NET_ADDRESS *inDbLocation)
 102 {
 103         return new SSDbImpl(SSCSPDL(this), inDbName, inDbLocation);
 104 }
 105
 106
 107 //
 108 // SSDbImpl -- Secure Storage Database Implementation
 109 //
 110 SSDbImpl::SSDbImpl(const SSCSPDL &cspdl, const char *inDbName,
 111                                    const CSSM_NET_ADDRESS *inDbLocation)
 112 : DbImpl(cspdl, inDbName, inDbLocation)
 113 {
 114 }
 115
 116 SSDbImpl::~SSDbImpl()
 117 {
 118 }
 119
 120 void
 121 SSDbImpl::create()
 122 {
 123         DbImpl::create();
 124 }
 125
 126 void
 127 SSDbImpl::open()
 128 {
 129         DbImpl::open();
 130 }
 131
 132 SSDbUniqueRecord
 133 SSDbImpl::insert(CSSM_DB_RECORDTYPE recordType,
 134                                  const CSSM_DB_RECORD_ATTRIBUTE_DATA *attributes,
 135                                  const CSSM_DATA *data,
 136                                  const CSSM_RESOURCE_CONTROL_CONTEXT *rc)
 137 {
 138         // Get the handle of the DL underlying this CSPDL.
 139         CSSM_DL_DB_HANDLE dldbh;
 140         passThrough(CSSM_APPLECSPDL_DB_GET_HANDLE, NULL,
 141                 reinterpret_cast<void **>(&dldbh));
 142
 143         // Turn off autocommit on the underlying DL and remember the old state.
 144         CSSM_BOOL autoCommit = CSSM_TRUE;
 145         check(CSSM_DL_PassThrough(dldbh, CSSM_APPLEFILEDL_TOGGLE_AUTOCOMMIT,
 146                 0, reinterpret_cast<void **>(&autoCommit)));
 147         SSGroup group(SSDb(this), rc);
 148         const CSSM_ACCESS_CREDENTIALS *cred = rc ? rc->AccessCred : NULL;
 149         try
 150         {
 151                 return insert(recordType, attributes, data, group, cred);
 152                 if (autoCommit)
 153                 {
 154                         // autoCommit was on so commit now that we are done and turn
 155                         // it back on.
 156                         check(CSSM_DL_PassThrough(dldbh, CSSM_APPLEFILEDL_COMMIT, NULL, NULL));
 157                         CSSM_DL_PassThrough(dldbh, CSSM_APPLEFILEDL_TOGGLE_AUTOCOMMIT,
 158                                 reinterpret_cast<const void *>(autoCommit), NULL);
 159                 }
 160         }
 161         catch(...)
 162         {
 163                 try { group->deleteKey(cred); } catch (...) {}
 164                 if (autoCommit)
 165                 {
 166                         // autoCommit was off so rollback since we failed and turn
 167                         // autoCommit back on.
 168                         CSSM_DL_PassThrough(dldbh, CSSM_APPLEFILEDL_ROLLBACK, NULL, NULL);
 169                         CSSM_DL_PassThrough(dldbh, CSSM_APPLEFILEDL_TOGGLE_AUTOCOMMIT,
 170                                 reinterpret_cast<const void *>(autoCommit), NULL);
 171                 }
 172                 throw;
 173         }
 174
 175         // keep the compiler happy -- this path is NEVER taken
 176         CssmError::throwMe(0);
 177 }
 178
 179 SSDbUniqueRecord
 180 SSDbImpl::insert(CSSM_DB_RECORDTYPE recordType,
 181                                  const CSSM_DB_RECORD_ATTRIBUTE_DATA *attributes,
 182                                  const CSSM_DATA *data, const SSGroup &group,
 183                                  const CSSM_ACCESS_CREDENTIALS *cred)
 184 {
 185         // Create an encoded dataBlob for this item.
 186         CssmDataContainer dataBlob(allocator());
 187         group->encodeDataBlob(data, cred, dataBlob);
 188
 189         // Insert the record with the new juicy dataBlob.
 190         return SSDbUniqueRecord(safe_cast<SSDbUniqueRecordImpl *>
 191             (&(*DbImpl::insert(recordType, attributes, &dataBlob))));
 192 }
 193
 194
 195 // DbCursorMaker
 196 DbCursorImpl *
 197 SSDbImpl::newDbCursor(const CSSM_QUERY &query, Allocator &allocator)
 198 {
 199         return new SSDbCursorImpl(Db(this), query, allocator);
 200 }
 201
 202 DbCursorImpl *
 203 SSDbImpl::newDbCursor(uint32 capacity, Allocator &allocator)
 204 {
 205         return new SSDbCursorImpl(Db(this), capacity, allocator);
 206 }
 207
 208
 209 // SSDbUniqueRecordMaker
 210 DbUniqueRecordImpl *
 211 SSDbImpl::newDbUniqueRecord()
 212 {
 213         return new SSDbUniqueRecordImpl(Db(this));
 214 }
 215
 216
 217 //
 218 // SSGroup -- Group key with acl, used to protect a group of items.
 219 //
 220 // @@@ Get this from a shared spot.
 221 CSSM_DB_NAME_ATTR(SSGroupImpl::kLabel, 6, (char*) "Label", 0, NULL, BLOB);
 222
 223 // Create a new group.
 224 SSGroupImpl::SSGroupImpl(const SSDb &ssDb,
 225                                                  const CSSM_RESOURCE_CONTROL_CONTEXT *credAndAclEntry)
 226 : KeyImpl(ssDb->csp()), mLabel(ssDb->allocator())
 227 {
 228         mLabel.Length = kLabelSize;
 229         mLabel.Data = reinterpret_cast<uint8 *>
 230                 (mLabel.mAllocator.malloc(mLabel.Length));
 231
 232         // Get our csp and set up a random number generation context.
 233         CSP csp(this->csp());
 234         Random random(csp, CSSM_ALGID_APPLE_YARROW);
 235
 236         // Generate a kLabelSize byte random number that will be the label of
 237         // the key which we store in the dataBlob.
 238         random.generate(mLabel, (uint32)mLabel.Length);
 239
 240         // Overwrite the first 4 bytes with the magic cookie for a group.
 241         reinterpret_cast<uint32 *>(mLabel.Data)[0] = h2n(uint32(kGroupMagic));
 242
 243         // @@@ Ensure that the label is unique (Chance of collision is 2^80 --
 244         // birthday paradox).
 245
 246         // Generate a permanent 3DES key that we will use to encrypt the data.
 247         GenerateKey genKey(csp, CSSM_ALGID_3DES_3KEY, 192);
 248         genKey.database(ssDb);
 249
 250         // Set the acl of the key correctly here
 251         genKey.rcc(credAndAclEntry);
 252
 253         // Generate the key
 254         genKey(*this, KeySpec(CSSM_KEYUSE_ENCRYPT|CSSM_KEYUSE_DECRYPT,
 255                                                   CSSM_KEYATTR_PERMANENT|CSSM_KEYATTR_SENSITIVE,
 256                                                   mLabel));
 257
 258         // Activate ourself so CSSM_FreeKey will get called when we go out of
 259         // scope.
 260         activate();
 261 }
 262
 263 // Lookup an existing group based on a dataBlob.
 264 SSGroupImpl::SSGroupImpl(const SSDb &ssDb, const CSSM_DATA &dataBlob)
 265 : KeyImpl(ssDb->csp()), mLabel(ssDb->allocator())
 266 {
 267         if (dataBlob.Length < kLabelSize + kIVSize)
 268                 CssmError::throwMe(CSSMERR_DL_RECORD_NOT_FOUND); // Not a SS record
 269
 270         mLabel = CssmData(dataBlob.Data, kLabelSize);
 271         if (*reinterpret_cast<const uint32 *>(mLabel.Data) != h2n (uint32(kGroupMagic)))
 272                 CssmError::throwMe(CSSMERR_DL_RECORD_NOT_FOUND); // Not a SS record
 273
 274         // Look up the symmetric key with that label.
 275         DbCursor cursor(new DbDbCursorImpl(ssDb, 0, Allocator::standard()));
 276         cursor->recordType(CSSM_DL_DB_RECORD_SYMMETRIC_KEY);
 277         cursor->add(CSSM_DB_EQUAL, kLabel, mLabel);
 278
 279         DbUniqueRecord keyId;
 280         CssmDataContainer keyData(ssDb->allocator());
 281         if (!cursor->next(NULL, &keyData, keyId))
 282                 CssmError::throwMe(CSSMERR_DL_RECORD_NOT_FOUND); // The key can't be found
 283
 284         // Set the key part of ourself.
 285         static_cast<CSSM_KEY &>(*this) =
 286                 *reinterpret_cast<const CSSM_KEY *>(keyData.Data);
 287
 288         // Activate ourself so CSSM_FreeKey will get called when we go out of
 289         // scope.
 290         activate();
 291 }
 292
 293 bool
 294 SSGroupImpl::isGroup(const CSSM_DATA &dataBlob)
 295 {
 296         return dataBlob.Length >= kLabelSize + kIVSize
 297                 && *reinterpret_cast<const uint32 *>(dataBlob.Data) == h2n(uint32(kGroupMagic));
 298 }
 299
 300 const CssmData
 301 SSGroupImpl::label() const
 302 {
 303         return mLabel;
 304 }
 305
 306 void
 307 SSGroupImpl::decodeDataBlob(const CSSM_DATA &dataBlob,
 308                                                         const CSSM_ACCESS_CREDENTIALS *cred,
 309                                                         Allocator &allocator, CSSM_DATA &data)
 310 {
 311         // First get the IV and the cipherText from the blob.
 312         CssmData iv(&dataBlob.Data[kLabelSize], kIVSize);
 313         CssmData cipherText(&dataBlob.Data[kLabelSize + kIVSize],
 314                                                 dataBlob.Length - (kLabelSize + kIVSize));
 315
 316         CssmDataContainer plainText1(allocator);
 317         CssmDataContainer plainText2(allocator);
 318         // Decrypt the data
 319         // @@@ Don't use staged decrypt once the AppleCSPDL can do combo
 320         // encryption.
 321         // Setup decryption context
 322         Decrypt decrypt(csp(), algorithm());
 323         decrypt.mode(CSSM_ALGMODE_CBCPadIV8);
 324         decrypt.padding(CSSM_PADDING_PKCS1);
 325         decrypt.initVector(iv);
 326         decrypt.key(Key(this));
 327         decrypt.cred(AccessCredentials::overlay(cred));
 328         decrypt.decrypt(&cipherText, 1, &plainText1, 1);
 329         decrypt.final(plainText2);
 330
 331         // Use DL allocator for allocating memory for data.
 332         CSSM_SIZE length = plainText1.Length + plainText2.Length;
 333         data.Data = allocator.alloc<uint8>((UInt32)length);
 334         data.Length = length;
 335         memcpy(data.Data, plainText1.Data, plainText1.Length);
 336         memcpy(&data.Data[plainText1.Length], plainText2.Data, plainText2.Length);
 337 }
 338
 339 void
 340 SSGroupImpl::encodeDataBlob(const CSSM_DATA *data,
 341                                                         const CSSM_ACCESS_CREDENTIALS *cred,
 342                                                         CssmDataContainer &dataBlob)
 343 {
 344         // Get our csp and set up a random number generation context.
 345         CSP csp(this->csp());
 346         Random random(csp, CSSM_ALGID_APPLE_YARROW);
 347
 348         // Encrypt data using key and encode it in a dataBlob.
 349
 350         // First calculate a random IV.
 351         uint8 ivBuf[kIVSize];
 352         CssmData iv(ivBuf, kIVSize);
 353         random.generate(iv, kIVSize);
 354
 355         // Setup encryption context
 356         Encrypt encrypt(csp, algorithm());
 357         encrypt.mode(CSSM_ALGMODE_CBCPadIV8);
 358         encrypt.padding(CSSM_PADDING_PKCS1);
 359         encrypt.initVector(iv);
 360         encrypt.key(Key(this));
 361         encrypt.cred(AccessCredentials::overlay(cred));
 362
 363         // Encrypt the data
 364         const CssmData nothing;
 365         const CssmData *plainText = data ? CssmData::overlay(data) : &nothing;
 366         // @@@ Don't use staged encrypt once the AppleCSPDL can do combo
 367         // encryption.
 368         CssmDataContainer cipherText1, cipherText2;
 369         encrypt.encrypt(plainText, 1, &cipherText1, 1);
 370         encrypt.final(cipherText2);
 371
 372         // Create a dataBlob containing the label followed by the IV followed
 373         // by the cipherText.
 374         CSSM_SIZE length = (kLabelSize + kIVSize
 375                                          + cipherText1.Length + cipherText2.Length);
 376         dataBlob.Data = dataBlob.mAllocator.alloc<uint8>((UInt32)length);
 377         dataBlob.Length = length;
 378         memcpy(dataBlob.Data, mLabel.Data, kLabelSize);
 379         memcpy(&dataBlob.Data[kLabelSize], iv.Data, kIVSize);
 380         memcpy(&dataBlob.Data[kLabelSize + kIVSize],
 381                    cipherText1.Data, cipherText1.Length);
 382         memcpy(&dataBlob.Data[kLabelSize + kIVSize + cipherText1.Length],
 383                    cipherText2.Data, cipherText2.Length);
 384 }
 385
 386
 387 //
 388 // SSDbCursorImpl -- Secure Storage Database Cursor Implementation.
 389 //
 390 SSDbCursorImpl::SSDbCursorImpl(const Db &db, const CSSM_QUERY &query,
 391                                                            Allocator &allocator)
 392 : DbDbCursorImpl(db, query, allocator)
 393 {
 394 }
 395
 396 SSDbCursorImpl::SSDbCursorImpl(const Db &db, uint32 capacity,
 397                                                            Allocator &allocator)
 398 : DbDbCursorImpl(db, capacity, allocator)
 399 {
 400 }
 401
 402 bool
 403 SSDbCursorImpl::next(DbAttributes *attributes, ::CssmDataContainer *data,
 404                                          DbUniqueRecord &uniqueId)
 405 {
 406         return next(attributes, data, uniqueId, NULL);
 407 }
 408
 409 bool
 410 SSDbCursorImpl::next(DbAttributes *attributes, ::CssmDataContainer *data,
 411                                          DbUniqueRecord &uniqueId,
 412                                          const CSSM_ACCESS_CREDENTIALS *cred)
 413 {
 414         if (!data)
 415                 return DbDbCursorImpl::next(attributes, data, uniqueId);
 416
 417         DbAttributes noAttrs, *attrs;
 418         attrs = attributes ? attributes : &noAttrs;
 419
 420         // Get the datablob for this record
 421         CssmDataContainer dataBlob(allocator());
 422         for (;;)
 423         {
 424                 if (!DbDbCursorImpl::next(attrs, &dataBlob, uniqueId))
 425                         return false;
 426
 427                 // Keep going until we find a non key type record.
 428                 CSSM_DB_RECORDTYPE rt = attrs->recordType();
 429                 if (rt != CSSM_DL_DB_RECORD_SYMMETRIC_KEY
 430                         && rt != CSSM_DL_DB_RECORD_PRIVATE_KEY
 431                         && rt != CSSM_DL_DB_RECORD_PUBLIC_KEY)
 432                 {
 433                         // @@@ Check the label and if it doesn't start with the magic for a SSKey return the key.
 434                         break;
 435                 }
 436                 else
 437                 {
 438                         // Free the key we just retrieved
 439                         database()->csp()->freeKey(*reinterpret_cast<CssmKey *>(dataBlob.Data));
 440                 }
 441         }
 442
 443         if (!SSGroupImpl::isGroup(dataBlob))
 444         {
 445                 data->Data = dataBlob.Data;
 446                 data->Length = dataBlob.Length;
 447                 dataBlob.Data = NULL;
 448                 dataBlob.Length = 0;
 449                 return true;
 450         }
 451
 452         // Get the group for dataBlob
 453         SSGroup group(database(), dataBlob);
 454
 455         // Decode the dataBlob, pass in the DL allocator.
 456         group->decodeDataBlob(dataBlob, cred, database()->allocator(), *data);
 457         return true;
 458 }
 459
 460 bool
 461 SSDbCursorImpl::nextKey(DbAttributes *attributes, Key &key,
 462                                                 DbUniqueRecord &uniqueId)
 463 {
 464         DbAttributes noAttrs, *attrs;
 465         attrs = attributes ? attributes : &noAttrs;
 466         CssmDataContainer keyData(database()->allocator());
 467         for (;;)
 468         {
 469                 if (!DbDbCursorImpl::next(attrs, &keyData, uniqueId))
 470                         return false;
 471                 // Keep going until we find a key type record.
 472                 CSSM_DB_RECORDTYPE rt = attrs->recordType();
 473                 if (rt == CSSM_DL_DB_RECORD_SYMMETRIC_KEY
 474                         || rt == CSSM_DL_DB_RECORD_PRIVATE_KEY
 475                         || rt == CSSM_DL_DB_RECORD_PUBLIC_KEY)
 476                         break;
 477         }
 478
 479         key = Key(database()->csp(), *reinterpret_cast<CSSM_KEY *>(keyData.Data));
 480         return true;
 481 }
 482
 483 void
 484 SSDbCursorImpl::activate()
 485 {
 486         return DbDbCursorImpl::activate();
 487 }
 488
 489 void
 490 SSDbCursorImpl::deactivate()
 491 {
 492         return DbDbCursorImpl::deactivate();
 493 }
 494
 495
 496 //
 497 // SSDbUniqueRecordImpl -- Secure Storage UniqueRecord Implementation.
 498 //
 499 SSDbUniqueRecordImpl::SSDbUniqueRecordImpl(const Db &db)
 500 : DbUniqueRecordImpl(db)
 501 {
 502 }
 503
 504 SSDbUniqueRecordImpl::~SSDbUniqueRecordImpl()
 505 {
 506 }
 507
 508 void
 509 SSDbUniqueRecordImpl::deleteRecord()
 510 {
 511         deleteRecord(NULL);
 512 }
 513
 514 void
 515 SSDbUniqueRecordImpl::deleteRecord(const CSSM_ACCESS_CREDENTIALS *cred)
 516 {
 517         // Get the datablob for this record
 518         // @@@ Fixme so we don't need to call DbUniqueRecordImpl::get
 519         CssmDataContainer dataBlob(allocator());
 520         DbAttributes attributes;
 521
 522         DbUniqueRecordImpl::get(&attributes, &dataBlob);
 523         CSSM_KEY_PTR keyPtr = (CSSM_KEY_PTR) dataBlob.data();
 524
 525         // delete data part first:
 526         // (1) don't leave data without keys around
 527         // (2) delete orphaned data anyway
 528         DbUniqueRecordImpl::deleteRecord();
 529
 530         // @@@ Use transactions?
 531         if (SSGroupImpl::isGroup(dataBlob))
 532         try {
 533                 // Get the group for dataBlob
 534                 SSGroup group(database(), dataBlob);
 535                 // Delete the group (key)
 536                 group->deleteKey(cred);
 537         } catch (const CssmError &err) {
 538                 switch (err.error) {
 539                 case CSSMERR_DL_RECORD_NOT_FOUND:
 540                         // Zombie item (no group key). Finally at peace! No error
 541                         break;
 542                 default:
 543
 544                         if (attributes.recordType() == CSSM_DL_DB_RECORD_PUBLIC_KEY ||
 545                                 attributes.recordType() == CSSM_DL_DB_RECORD_PRIVATE_KEY ||
 546                                 attributes.recordType() == CSSM_DL_DB_RECORD_SYMMETRIC_KEY)
 547                         {
 548                                 allocator().free(keyPtr->KeyData.Data);
 549                         }
 550
 551                         throw;
 552                 }
 553         }
 554
 555         if (attributes.recordType() == CSSM_DL_DB_RECORD_PUBLIC_KEY ||
 556                 attributes.recordType() == CSSM_DL_DB_RECORD_PRIVATE_KEY ||
 557                 attributes.recordType() == CSSM_DL_DB_RECORD_SYMMETRIC_KEY)
 558         {
 559                 allocator().free(keyPtr->KeyData.Data);
 560         }
 561 }
 562
 563 void
 564 SSDbUniqueRecordImpl::modify(CSSM_DB_RECORDTYPE recordType,
 565                                                          const CSSM_DB_RECORD_ATTRIBUTE_DATA *attributes,
 566                                                          const CSSM_DATA *data,
 567                                                          CSSM_DB_MODIFY_MODE modifyMode)
 568 {
 569         modify(recordType, attributes, data, modifyMode, NULL);
 570 }
 571
 572 void
 573 SSDbUniqueRecordImpl::modify(CSSM_DB_RECORDTYPE recordType,
 574                                                          const CSSM_DB_RECORD_ATTRIBUTE_DATA *attributes,
 575                                                          const CSSM_DATA *data,
 576                                                          CSSM_DB_MODIFY_MODE modifyMode,
 577                                                          const CSSM_ACCESS_CREDENTIALS *cred)
 578 {
 579         if (!data)
 580         {
 581                 DbUniqueRecordImpl::modify(recordType, attributes, NULL, modifyMode);
 582                 return;
 583         }
 584
 585         // Get the datablob for this record
 586         // @@@ Fixme so we don't need to call DbUniqueRecordImpl::get
 587         CssmDataContainer oldDataBlob(allocator());
 588         DbUniqueRecordImpl::get(NULL, &oldDataBlob);
 589
 590         if (!SSGroupImpl::isGroup(oldDataBlob))
 591         {
 592                 DbUniqueRecordImpl::modify(recordType, attributes, data, modifyMode);
 593                 return;
 594         }
 595
 596         // Get the group for oldDataBlob
 597         SSGroup group(database(), oldDataBlob);
 598
 599         // Create a new dataBlob.
 600         CssmDataContainer dataBlob(allocator());
 601         group->encodeDataBlob(data, cred, dataBlob);
 602         DbUniqueRecordImpl::modify(recordType, attributes, &dataBlob, modifyMode);
 603 }
 604
 605 void
 606 SSDbUniqueRecordImpl::get(DbAttributes *attributes, ::CssmDataContainer *data)
 607 {
 608         get(attributes, data, NULL);
 609 }
 610
 611 void
 612 SSDbUniqueRecordImpl::get(DbAttributes *attributes, ::CssmDataContainer *data,
 613                                                   const CSSM_ACCESS_CREDENTIALS *cred)
 614 {
 615         if (!data)
 616         {
 617                 DbUniqueRecordImpl::get(attributes, NULL);
 618                 return;
 619         }
 620
 621         // Get the datablob for this record
 622         // @@@ Fixme so we don't need to call DbUniqueRecordImpl::get
 623         CssmDataContainer dataBlob(allocator());
 624         DbUniqueRecordImpl::get(attributes, &dataBlob);
 625
 626         if (!SSGroupImpl::isGroup(dataBlob))
 627         {
 628                 data->Data = dataBlob.Data;
 629                 data->Length = dataBlob.Length;
 630                 dataBlob.Data = NULL;
 631                 dataBlob.Length = 0;
 632                 return;
 633         }
 634
 635         // Get the group for dataBlob
 636         SSGroup group(database(), dataBlob);
 637
 638         // Decode the dataBlob, pass in the DL allocator.
 639         group->decodeDataBlob(dataBlob, cred, allocator(), *data);
 640 }
 641
 642 SSGroup
 643 SSDbUniqueRecordImpl::group()
 644 {
 645         // Get the datablob for this record
 646         // @@@ Fixme so we don't need to call DbUniqueRecordImpl::get
 647         CssmDataContainer dataBlob(allocator());
 648         DbUniqueRecordImpl::get(NULL, &dataBlob);
 649         return SSGroup(database(), dataBlob);
 650 }