OSX/libsecurity_keychain/lib/TokenLogin.cpp

   1 /*
   2  * Copyright (c) 2016 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 "TokenLogin.h"
  25
  26 #include <Security/SecItem.h>
  27 #include <Security/SecItemPriv.h>
  28 #include <Security/SecKeyPriv.h>
  29 #include "SecBase64P.h"
  30 #include <Security/SecIdentity.h>
  31 #include <Security/SecCertificatePriv.h>
  32 #include <Security/SecKeychainPriv.h>
  33 #include <security_utilities/cfutilities.h>
  34 #include <libaks.h>
  35 #include <libaks_smartcard.h>
  36
  37 extern "C" {
  38 #include <ctkclient.h>
  39 #include <coreauthd_spi.h>
  40 }
  41
  42 #define kSecTokenLoginDomain CFSTR("com.apple.security.tokenlogin")
  43
  44 static CFStringRef CF_RETURNS_RETAINED cfDataToHex(CFDataRef bin)
  45 {
  46     size_t len = CFDataGetLength(bin) * 2;
  47     CFMutableStringRef str = CFStringCreateMutable(NULL, len);
  48
  49     static const char* digits[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"};
  50
  51     const uint8_t* data = CFDataGetBytePtr(bin);
  52     for (size_t i = 0; i < CFDataGetLength(bin); i++) {
  53         CFStringAppendCString(str, digits[data[i] >> 4], 1);
  54         CFStringAppendCString(str, digits[data[i] & 0xf], 1);
  55     }
  56     return str;
  57 }
  58
  59 static CFStringRef getPin(CFDictionaryRef context)
  60 {
  61         if (!context) {
  62                 return NULL;
  63         }
  64
  65         CFStringRef pin = (CFStringRef)CFDictionaryGetValue(context, kSecAttrService);
  66         if (!pin || CFGetTypeID(pin) != CFStringGetTypeID()) {
  67                 return NULL;
  68         }
  69         return pin;
  70 }
  71
  72 static CFStringRef getTokenId(CFDictionaryRef context)
  73 {
  74         if (!context) {
  75                 return NULL;
  76         }
  77
  78         CFStringRef tokenId = (CFStringRef)CFDictionaryGetValue(context, kSecAttrTokenID);
  79         if (!tokenId || CFGetTypeID(tokenId) != CFStringGetTypeID()) {
  80                 secinfo("TokenLogin", "Invalid tokenId");
  81                 return NULL;
  82         }
  83         return tokenId;
  84 }
  85
  86 static CFDataRef getPubKeyHash(CFDictionaryRef context)
  87 {
  88         if (!context) {
  89                 return NULL;
  90         }
  91
  92         CFDataRef pubKeyHash = (CFDataRef)CFDictionaryGetValue(context, kSecAttrPublicKeyHash);
  93         if (!pubKeyHash || CFGetTypeID(pubKeyHash) != CFDataGetTypeID()) {
  94                 secinfo("TokenLogin", "Invalid pubkeyhash");
  95                 return NULL;
  96         }
  97         return pubKeyHash;
  98 }
  99
 100 static CFDataRef getPubKeyHashWrap(CFDictionaryRef context)
 101 {
 102         if (!context) {
 103                 return NULL;
 104         }
 105
 106         CFDataRef pubKeyHashWrap = (CFDataRef)CFDictionaryGetValue(context, kSecAttrAccount);
 107         if (!pubKeyHashWrap || CFGetTypeID(pubKeyHashWrap) != CFDataGetTypeID()) {
 108                 secinfo("TokenLogin", "Invalid pubkeyhashwrap");
 109                 return NULL;
 110         }
 111         return pubKeyHashWrap;
 112 }
 113
 114 static OSStatus privKeyForPubKeyHash(CFDictionaryRef context, SecKeyRef *privKey, CFTypeRef *laCtx)
 115 {
 116         if (!context) {
 117                 return errSecParam;
 118         }
 119
 120     CFRef<CFMutableDictionaryRef> tokenAttributes = makeCFMutableDictionary(1, kSecAttrTokenID, getTokenId(context));
 121     CFRef<CFErrorRef> error;
 122
 123         CFStringRef pin = getPin(context);
 124         if (pin) {
 125                 CFRef<CFTypeRef> LAContext = LACreateNewContextWithACMContext(NULL, error.take());
 126                 if (!LAContext) {
 127                         secinfo("TokenLogin", "Failed to LA Context: %@", error.get());
 128                         return errSecParam;
 129                 }
 130                 if (laCtx)
 131                         *laCtx = (CFTypeRef)CFRetain(LAContext);
 132         CFRef<CFDataRef> externalizedContext = LACopyACMContext(LAContext, error.take());
 133         if (!externalizedContext) {
 134             secinfo("TokenLogin", "Failed to get externalized context: %@", error.get());
 135             return errSecParam;
 136         }
 137         CFDictionarySetValue(tokenAttributes, kSecUseCredentialReference, externalizedContext.get());
 138         CFDictionarySetValue(tokenAttributes, CFSTR("PIN"), pin);
 139     }
 140
 141     CFRef<TKTokenRef> token = TKTokenCreate(tokenAttributes, error.take());
 142     if (!token) {
 143         secinfo("TokenLogin", "Failed to create token: %@", error.get());
 144         return errSecParam;
 145     }
 146
 147     CFRef<CFArrayRef> identities = TKTokenCopyIdentities(token, TKTokenKeyUsageAny, error.take());
 148     if (!identities || !CFArrayGetCount(identities)) {
 149         secinfo("TokenLogin", "No identities found for token: %@", error.get());
 150         return errSecParam;
 151     }
 152
 153         CFDataRef desiredHash = getPubKeyHashWrap(context);
 154     CFIndex idx, count = CFArrayGetCount(identities);
 155     for (idx = 0; idx < count; ++idx) {
 156         SecIdentityRef identity = (SecIdentityRef)CFArrayGetValueAtIndex(identities, idx);
 157         CFRef<SecCertificateRef> certificate;
 158         OSStatus result = SecIdentityCopyCertificate(identity, certificate.take());
 159         if (result != errSecSuccess) {
 160             secinfo("TokenLogin", "Failed to get certificate for identity: %d", (int) result);
 161             continue;
 162         }
 163
 164         CFRef<CFDataRef> identityHash = SecCertificateCopyPublicKeySHA1Digest(certificate);
 165         if (identityHash && CFEqual(desiredHash, identityHash)) {
 166             result = SecIdentityCopyPrivateKey(identity, privKey);
 167             if (result != errSecSuccess) {
 168                 secinfo("TokenLogin", "Failed to get identity private key: %d", (int) result);
 169             }
 170             return result;
 171         }
 172     }
 173
 174     return errSecParam;
 175 }
 176
 177 OSStatus TokenLoginGetContext(const void *base64TokenLoginData, UInt32 base64TokenLoginDataLength, CFDictionaryRef *context)
 178 {
 179         if (!base64TokenLoginData || !context) {
 180                 return errSecParam;
 181         }
 182
 183         // Token data are base64 encoded in password.
 184         size_t dataLen = SecBase64Decode((const char *)base64TokenLoginData, base64TokenLoginDataLength, NULL, 0);
 185         if (!dataLen) {
 186                 secinfo("TokenLogin", "Invalid base64 encoded token data");
 187                 return errSecParam;
 188         }
 189
 190         CFRef<CFMutableDataRef> data = CFDataCreateMutable(kCFAllocatorDefault, dataLen);
 191         dataLen = SecBase64Decode((const char *)base64TokenLoginData, base64TokenLoginDataLength, CFDataGetMutableBytePtr(data), dataLen);
 192         if (!dataLen) {
 193                 secinfo("TokenLogin", "Invalid base64 encoded token data");
 194                 return errSecParam;
 195         }
 196         CFDataSetLength(data, dataLen);
 197
 198         // Content of the password consists of a serialized dictionary containing token ID, PIN, wrap key hash etc.
 199         CFRef<CFErrorRef> error;
 200         *context = (CFDictionaryRef)CFPropertyListCreateWithData(kCFAllocatorDefault,
 201                                                                                                                          data,
 202                                                                                                                          kCFPropertyListImmutable,
 203                                                                                                                          NULL,
 204                                                                                                                          error.take());
 205         if (!*context || CFGetTypeID(*context) != CFDictionaryGetTypeID()) {
 206                 secinfo("TokenLogin", "Invalid token login data property list, %@", error.get());
 207                 return errSecParam;
 208         }
 209
 210         if (!getPin(*context) || !getTokenId(*context) || !getPubKeyHash(*context) || !getPubKeyHashWrap(*context)) {
 211                 secinfo("TokenLogin", "Invalid token login data context, %@", error.get());
 212                 return errSecParam;
 213         }
 214
 215         return errSecSuccess;
 216 }
 217
 218 OSStatus TokenLoginGetUnlockKey(CFDictionaryRef context, CFDataRef *unlockKey)
 219 {
 220         if (!context || !unlockKey) {
 221                 return errSecParam;
 222         }
 223
 224         CFRef<CFDictionaryRef> loginData;
 225         OSStatus result = TokenLoginGetLoginData(context, loginData.take());
 226         if (result != errSecSuccess) {
 227                 secinfo("TokenLogin", "Failed to get login data: %d", (int)result);
 228                 return result;
 229         }
 230
 231         CFDataRef wrappedUnlockKey = (CFDataRef)CFDictionaryGetValue(loginData, kSecValueData);
 232         if (!wrappedUnlockKey) {
 233                 secinfo("TokenLogin", "Wrapped unlock key not found in unlock key data");
 234                 return errSecParam;
 235         }
 236         SecKeyAlgorithm algorithm = (SecKeyAlgorithm)CFDictionaryGetValue(loginData, kSecAttrService);
 237         if (!algorithm) {
 238                 secinfo("TokenLogin", "Algorithm not found in unlock key data");
 239                 return errSecParam;
 240         }
 241
 242         CFRef<SecKeyRef> privKey;
 243         CFRef<CFTypeRef> LAContext;
 244         result = privKeyForPubKeyHash(context, privKey.take(), LAContext.take());
 245         if (result != errSecSuccess) {
 246                 secinfo("TokenLogin", "Failed to get private key for public key hash: %d", (int)result);
 247                 return result;
 248         }
 249
 250         CFRef<SecKeyRef> pubKey = SecKeyCopyPublicKey(privKey);
 251         if (!pubKey) {
 252                 secinfo("TokenLogin", "Failed to get public key from private key");
 253                 return errSecParam;
 254         }
 255         CFRef<CFErrorRef> error;
 256         *unlockKey = SecKeyCreateDecryptedData(privKey,
 257                                                                                    algorithm,
 258                                                                                    wrappedUnlockKey,
 259                                                                                    error.take());
 260         if (!*unlockKey) {
 261                 secinfo("TokenLogin", "Failed to unwrap unlock key: %@", error.get());
 262                 return errSecDecode;
 263         }
 264
 265         // we need to re-wrap already unwrapped data to avoid capturing and reusing communication with the smartcard
 266         CFRef<CFDataRef> reWrappedUnlockKey = SecKeyCreateEncryptedData(pubKey, algorithm, *unlockKey, error.take());
 267         if (!reWrappedUnlockKey) {
 268                 secinfo("TokenLogin", "Failed to rewrap unlock key: %@", error.get());
 269                 TokenLoginDeleteUnlockData(getPubKeyHash(context));
 270                 return errSecParam;
 271         }
 272
 273         CFRef<CFMutableDictionaryRef> newDict = CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 4, loginData);
 274         if (newDict) {
 275                 CFDictionarySetValue(newDict, kSecValueData, reWrappedUnlockKey);
 276                 TokenLoginStoreUnlockData(context, newDict);
 277         }
 278
 279         return errSecSuccess;
 280 }
 281
 282 OSStatus TokenLoginGetLoginData(CFDictionaryRef context, CFDictionaryRef *loginData)
 283 {
 284         if (!loginData || !context) {
 285                 return errSecParam;
 286         }
 287
 288         CFRef<CFStringRef> pubKeyHashHex = cfDataToHex(getPubKeyHash(context));
 289         CFPreferencesSynchronize(kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 290         CFRef<CFDataRef> storedData = (CFDataRef)CFPreferencesCopyValue(pubKeyHashHex, kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 291         if (!storedData) {
 292                 secinfo("TokenLogin", "Failed to read token login plist");
 293                 return errSecIO;
 294         }
 295
 296         CFRef<CFErrorRef> error;
 297         *loginData = (CFDictionaryRef)CFPropertyListCreateWithData(kCFAllocatorDefault,
 298                                                                                                                            storedData,
 299                                                                                                                            kCFPropertyListImmutable,
 300                                                                                                                            NULL,
 301                                                                                                                            error.take());
 302         if (!*loginData || CFGetTypeID(*loginData) != CFDictionaryGetTypeID()) {
 303                 secinfo("TokenLogin", "Failed to deserialize unlock key data: %@", error.get());
 304                 return errSecParam;
 305         }
 306
 307         return errSecSuccess;
 308 }
 309
 310 OSStatus TokenLoginGetPin(CFDictionaryRef context, CFStringRef *pin)
 311 {
 312         if (!pin || !context) {
 313                 return errSecParam;
 314         }
 315         *pin = getPin(context);
 316
 317         return errSecSuccess;
 318 }
 319
 320 OSStatus TokenLoginUpdateUnlockData(CFDictionaryRef context, CFStringRef password)
 321 {
 322         if (!context) {
 323                 return errSecParam;
 324         }
 325
 326         CFRef<SecKeychainRef> loginKeychain;
 327         OSStatus result = SecKeychainCopyLogin(loginKeychain.take());
 328         if (result != errSecSuccess) {
 329                 secinfo("TokenLogin", "Failed to get user keychain: %d", (int) result);
 330                 return result;
 331         }
 332
 333     return SecKeychainStoreUnlockKeyWithPubKeyHash(getPubKeyHash(context), getTokenId(context), getPubKeyHashWrap(context), loginKeychain, password);
 334 }
 335
 336 OSStatus TokenLoginCreateLoginData(CFStringRef tokenId, CFDataRef pubKeyHash, CFDataRef pubKeyHashWrap, CFDataRef unlockKey, CFDataRef scBlob)
 337 {
 338         if (!tokenId || !pubKeyHash || !pubKeyHashWrap || !unlockKey || !scBlob)
 339                 return errSecParam;
 340
 341         CFRef<CFDictionaryRef> ctx = makeCFDictionary(3,
 342                                                                                                   kSecAttrTokenID,                      tokenId,
 343                                                                                                   kSecAttrPublicKeyHash,        pubKeyHash,
 344                                                                                                   kSecAttrAccount,                      pubKeyHashWrap
 345                                                                                                   );
 346         CFRef<SecKeyRef> privKey;
 347         OSStatus result = privKeyForPubKeyHash(ctx, privKey.take(), NULL);
 348         if (result != errSecSuccess) {
 349                 secinfo("TokenLogin", "Failed to get private key for public key hash: %d", (int) result);
 350                 return result;
 351         }
 352
 353         CFRef<SecKeyRef> pubKey = SecKeyCopyPublicKey(privKey);
 354         if (!pubKey) {
 355                 secinfo("TokenLogin", "Failed to get public key from private key");
 356                 return errSecParam;
 357         }
 358
 359         SecKeyAlgorithm algorithms[] = {
 360                 kSecKeyAlgorithmECIESEncryptionStandardX963SHA512AESGCM,
 361                 kSecKeyAlgorithmECIESEncryptionStandardX963SHA384AESGCM,
 362                 kSecKeyAlgorithmECIESEncryptionStandardX963SHA256AESGCM,
 363                 kSecKeyAlgorithmECIESEncryptionStandardX963SHA224AESGCM,
 364                 kSecKeyAlgorithmECIESEncryptionStandardX963SHA1AESGCM,
 365                 kSecKeyAlgorithmRSAEncryptionOAEPSHA512AESGCM,
 366                 kSecKeyAlgorithmRSAEncryptionOAEPSHA384AESGCM,
 367                 kSecKeyAlgorithmRSAEncryptionOAEPSHA256AESGCM,
 368                 kSecKeyAlgorithmRSAEncryptionOAEPSHA224AESGCM,
 369                 kSecKeyAlgorithmRSAEncryptionOAEPSHA1AESGCM
 370         };
 371
 372         SecKeyAlgorithm algorithm = NULL;
 373         for (size_t i = 0; i < sizeof(algorithms) / sizeof(*algorithms); i++) {
 374                 if (SecKeyIsAlgorithmSupported(pubKey, kSecKeyOperationTypeEncrypt, algorithms[i])
 375                         && SecKeyIsAlgorithmSupported(privKey, kSecKeyOperationTypeDecrypt, algorithms[i])) {
 376                         algorithm = algorithms[i];
 377                         break;
 378                 }
 379         }
 380         if (algorithm == NULL) {
 381                 secinfo("SecKeychain", "Failed to find supported wrap algorithm");
 382                 return errSecParam;
 383         }
 384
 385         CFRef<CFErrorRef> error;
 386         CFRef<CFDataRef> wrappedUnlockKey = SecKeyCreateEncryptedData(pubKey, algorithm, unlockKey, error.take());
 387         if (!wrappedUnlockKey) {
 388                 secinfo("TokenLogin", "Failed to wrap unlock key: %@", error.get());
 389                 return errSecParam;
 390         }
 391
 392         CFRef<CFDictionaryRef> loginData = makeCFDictionary(4,
 393                                                                                                                 kSecAttrService,                algorithm,
 394                                                                                                                 kSecAttrPublicKeyHash,  pubKeyHashWrap,
 395                                                                                                                 kSecValueData,                  wrappedUnlockKey.get(),
 396                                                                                                                 kSecClassKey,                   scBlob
 397                                                                                                                 );
 398         return TokenLoginStoreUnlockData(ctx, loginData);
 399 }
 400
 401 OSStatus TokenLoginStoreUnlockData(CFDictionaryRef context, CFDictionaryRef loginData)
 402 {
 403
 404         CFRef<CFErrorRef> error;
 405         CFRef<CFDataRef> data = CFPropertyListCreateData(kCFAllocatorDefault,
 406                                                                                    loginData,
 407                                                                                    kCFPropertyListBinaryFormat_v1_0,
 408                                                                                    0,
 409                                                                                    error.take());
 410         if (!data) {
 411                 secdebug("TokenLogin", "Failed to create unlock data: %@", error.get());
 412                 return errSecInternal;
 413         }
 414     CFRef<CFStringRef> pubKeyHashHex = cfDataToHex(getPubKeyHash(context));
 415         CFPreferencesSetValue(pubKeyHashHex, data, kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 416         CFPreferencesSynchronize(kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 417         CFRef<CFDataRef> storedData = (CFDataRef)CFPreferencesCopyValue(pubKeyHashHex, kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 418
 419         if (!storedData || !CFEqual(storedData, data)) {
 420         secinfo("TokenLogin", "Failed to write token login plist");
 421         return errSecIO;
 422     }
 423
 424     return errSecSuccess;
 425 }
 426
 427 OSStatus TokenLoginDeleteUnlockData(CFDataRef pubKeyHash)
 428 {
 429     CFRef<CFStringRef> pubKeyHashHex = cfDataToHex(pubKeyHash);
 430         CFPreferencesSetValue(pubKeyHashHex, NULL, kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 431         CFPreferencesSynchronize(kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 432         CFRef<CFDataRef> storedData = (CFDataRef)CFPreferencesCopyValue(pubKeyHashHex, kSecTokenLoginDomain, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
 433
 434         if (storedData) {
 435                 secinfo("TokenLogin", "Failed to remove unlock data");
 436                 return errSecIO;
 437         }
 438
 439     return errSecSuccess;
 440 }
 441
 442 OSStatus TokenLoginGetScBlob(CFDataRef pubKeyHashWrap, CFStringRef tokenId, CFStringRef password, CFDataRef *scBlob)
 443 {
 444         if (scBlob == NULL || password == NULL || pubKeyHashWrap == NULL || tokenId == NULL) {
 445                 secinfo("TokenLogin", "TokenLoginGetScBlob wrong params");
 446                 return errSecParam;
 447         }
 448
 449         CFRef<CFDictionaryRef> ctx = makeCFDictionary(2,
 450                                                                                                   kSecAttrTokenID,                      tokenId,
 451                                                                                                   kSecAttrAccount,                      pubKeyHashWrap
 452                                                                                                   );
 453
 454         CFRef<SecKeyRef> privKey;
 455         OSStatus retval = privKeyForPubKeyHash(ctx, privKey.take(), NULL);
 456         if (retval != errSecSuccess) {
 457                 secinfo("TokenLogin", "TokenLoginGetScBlob failed to get private key for public key hash: %d", (int) retval);
 458                 return retval;
 459         }
 460
 461         CFRef<SecKeyRef> pubKey = SecKeyCopyPublicKey(privKey);
 462         if (!pubKey) {
 463                 secinfo("TokenLogin", "TokenLoginGetScBlob no pubkey");
 464                 return errSecInternal;
 465         }
 466
 467         CFRef<CFDictionaryRef> attributes = SecKeyCopyAttributes(pubKey);
 468         if (!attributes) {
 469                 secinfo("TokenLogin", "TokenLoginGetScBlob no attributes");
 470                 return errSecInternal;
 471         }
 472
 473         aks_smartcard_mode_t mode;
 474         CFRef<CFStringRef> type = (CFStringRef)CFDictionaryGetValue(attributes, kSecAttrKeyType);
 475         if (CFEqual(type, kSecAttrKeyTypeRSA))
 476                 mode = AKS_SMARTCARD_MODE_RSA;
 477         else if (CFEqual(type, kSecAttrKeyTypeEC))
 478                 mode = AKS_SMARTCARD_MODE_ECDH;
 479         else {
 480                 secinfo("TokenLogin", "TokenLoginGetScBlob bad type");
 481                 return errSecNotAvailable;
 482         }
 483
 484         CFRef<CFDataRef> publicBytes = SecKeyCopyExternalRepresentation(pubKey, NULL);
 485         if (!publicBytes) {
 486                 secinfo("TokenLogin", "TokenLoginGetScBlob cannot get public bytes");
 487                 return retval;
 488         }
 489
 490         CFIndex maxLength = CFStringGetMaximumSizeForEncoding(CFStringGetLength(password), kCFStringEncodingUTF8) + 1;
 491         char* buf = (char*)malloc(maxLength);
 492         if (buf == NULL) {
 493                 secinfo("TokenLogin", "TokenLoginGetScBlob no mem for buffer");
 494                 return retval;
 495         }
 496
 497         if (CFStringGetCString(password, buf, maxLength, kCFStringEncodingUTF8) == FALSE) {
 498                 secinfo("TokenLogin", "TokenLoginGetScBlob no pwd cstr");
 499                 free(buf);
 500                 return retval;
 501         }
 502
 503         void *sc_blob = NULL;
 504         size_t sc_len = 0;
 505         aks_smartcard_unregister(session_keybag_handle); // just to be sure no previous registration exist
 506         kern_return_t aks_retval = aks_smartcard_register(session_keybag_handle, (uint8_t *)buf, strlen(buf), mode, (uint8_t *)CFDataGetBytePtr(publicBytes), (size_t)CFDataGetLength(publicBytes), &sc_blob, &sc_len);
 507         free(buf);
 508         secinfo("TokenLogin", "TokenLoginGetScBlob register result %d", aks_retval);
 509
 510         if (sc_blob) {
 511                 *scBlob = CFDataCreate(kCFAllocatorDefault, (const UInt8 *)sc_blob, (CFIndex)sc_len);
 512                 free(sc_blob);
 513         }
 514         return aks_retval;
 515 }
 516
 517 OSStatus TokenLoginUnlockKeybag(CFDictionaryRef context, CFDictionaryRef loginData)
 518 {
 519         if (!loginData || !context) {
 520                 return errSecParam;
 521         }
 522
 523         CFDataRef scBlob = (CFDataRef)CFDictionaryGetValue(loginData, kSecClassKey);
 524         if (scBlob == NULL) {
 525                 secinfo("TokenLogin", "Failed to get scblob");
 526                 return errSecInternal;
 527         }
 528
 529         CFRef<CFErrorRef> error;
 530         CFRef<SecKeyRef> privKey;
 531         CFRef<CFTypeRef> LAContext;
 532         OSStatus retval = privKeyForPubKeyHash(context, privKey.take(), LAContext.take());
 533         if (retval != errSecSuccess) {
 534                 secinfo("TokenLogin", "Failed to get private key for public key hash: %d", (int) retval);
 535                 return retval;
 536         }
 537
 538         CFRef<SecKeyRef> pubKey = SecKeyCopyPublicKey(privKey);
 539         if (!pubKey) {
 540                 secinfo("TokenLogin", "Failed to get pubkey");
 541                 return retval;
 542         }
 543
 544         CFRef<CFDictionaryRef> attributes = SecKeyCopyAttributes(pubKey);
 545         if (!attributes) {
 546                 secinfo("TokenLogin", "TokenLoginUnlockKeybag no attributes");
 547                 return errSecInternal;
 548         }
 549
 550         aks_smartcard_mode_t mode;
 551         CFStringRef type = (CFStringRef)CFDictionaryGetValue(attributes, kSecAttrKeyType);
 552         if (CFEqual(type, kSecAttrKeyTypeRSA))
 553                 mode = AKS_SMARTCARD_MODE_RSA;
 554         else if (CFEqual(type, kSecAttrKeyTypeEC))
 555                 mode = AKS_SMARTCARD_MODE_ECDH;
 556         else {
 557                 secinfo("TokenLogin", "TokenLoginUnlockKeybag bad type");
 558                 return errSecNotAvailable;
 559         }
 560
 561         void *scChallenge = NULL;
 562         size_t scChallengeLen = 0;
 563         int res = aks_smartcard_request_unlock(session_keybag_handle, (uint8_t *)CFDataGetBytePtr(scBlob), (size_t)CFDataGetLength(scBlob), &scChallenge, &scChallengeLen);
 564         if (res != 0) {
 565                 secinfo("TokenLogin", "TokenLoginUnlockKeybag cannot request unlock: %x", res);
 566                 return errSecInternal;
 567         }
 568         const void *scUsk = NULL;
 569         size_t scUskLen = 0;
 570         res = aks_smartcard_get_sc_usk(scChallenge, scChallengeLen, &scUsk, &scUskLen);
 571
 572         if (res != 0 || scUsk == NULL) {
 573                 free(scChallenge);
 574                 secinfo("TokenLogin", "TokenLoginUnlockKeybag cannot get usk: %x", res);
 575                 return errSecInternal;
 576         }
 577
 578         CFRef<CFTypeRef> wrappedUsk;
 579         if (mode == AKS_SMARTCARD_MODE_ECDH) {
 580                 const void *ecPub = NULL;
 581                 size_t ecPubLen = 0;
 582                 res = aks_smartcard_get_ec_pub(scChallenge, scChallengeLen, &ecPub, &ecPubLen);
 583                 if (res != 0 || ecPub == NULL) {
 584                         free(scChallenge);
 585                         secinfo("TokenLogin", "TokenLoginUnlockKeybag cannot get ecpub: %x", res);
 586                         return errSecInternal;
 587                 }
 588                 wrappedUsk = CFDataCreateMutable(kCFAllocatorDefault, ecPubLen + scUskLen);
 589                 if (!wrappedUsk) {
 590                         free(scChallenge);
 591                         secinfo("TokenLogin", "TokenLoginUnlockKeybag no mem for ecpubusk");
 592                         return errSecInternal;
 593                 }
 594                 CFDataAppendBytes((CFMutableDataRef)wrappedUsk.get(), (const UInt8 *)ecPub, (CFIndex)ecPubLen);
 595                 CFDataAppendBytes((CFMutableDataRef)wrappedUsk.get(), (const UInt8 *)scUsk, (CFIndex)scUskLen);
 596         } else {
 597                 wrappedUsk = CFDataCreate(kCFAllocatorDefault, (const UInt8 *)scUsk, (CFIndex)scUskLen);
 598         }
 599         free(scChallenge);
 600         // decrypt Usk with SC
 601         CFRef<CFDataRef> unwrappedUsk = SecKeyCreateDecryptedData(privKey,
 602                                                                                                         mode == AKS_SMARTCARD_MODE_RSA ? kSecKeyAlgorithmRSAEncryptionOAEPSHA256 : kSecKeyAlgorithmECIESEncryptionAKSSmartCard,
 603                                                                                                         (CFDataRef)wrappedUsk.get(),
 604                                                                                                         error.take());
 605         if (!unwrappedUsk) {
 606                 secinfo("TokenLogin", "TokenLoginUnlockKeybag failed to unwrap blob: %@", error.get());
 607                 return errSecInternal;
 608         }
 609
 610         void *scNewBlob = NULL;
 611         size_t scNewLen = 0;
 612         res = aks_smartcard_unlock(session_keybag_handle, (uint8_t *)CFDataGetBytePtr(scBlob), (size_t)CFDataGetLength(scBlob), (uint8_t *)CFDataGetBytePtr(unwrappedUsk), (size_t)CFDataGetLength(unwrappedUsk), &scNewBlob, &scNewLen);
 613         if (scNewBlob) {
 614                 CFRef<CFDataRef> newBlobData = CFDataCreate(kCFAllocatorDefault, (const UInt8 *)scNewBlob, (CFIndex)scNewLen);
 615                 free(scNewBlob);
 616                 CFRef<CFMutableDictionaryRef> newDict = CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 4, loginData);
 617                 if (newDict) {
 618                         CFDictionarySetValue(newDict, kSecClassKey, newBlobData.get());
 619                         TokenLoginStoreUnlockData(context, newDict);
 620                 }
 621         }
 622         return res;
 623 }