1 /** @file 2 X.509 Certificate Handler Wrapper Implementation over OpenSSL. 3 4 Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include "InternalCryptLib.h" 16 #include <openssl/x509.h> 17 #include <openssl/rsa.h> 18 19 /** 20 Construct a X509 object from DER-encoded certificate data. 21 22 If Cert is NULL, then return FALSE. 23 If SingleX509Cert is NULL, then return FALSE. 24 25 @param[in] Cert Pointer to the DER-encoded certificate data. 26 @param[in] CertSize The size of certificate data in bytes. 27 @param[out] SingleX509Cert The generated X509 object. 28 29 @retval TRUE The X509 object generation succeeded. 30 @retval FALSE The operation failed. 31 32 **/ 33 BOOLEAN 34 EFIAPI 35 X509ConstructCertificate ( 36 IN CONST UINT8 *Cert, 37 IN UINTN CertSize, 38 OUT UINT8 **SingleX509Cert 39 ) 40 { 41 X509 *X509Cert; 42 CONST UINT8 *Temp; 43 44 // 45 // Check input parameters. 46 // 47 if (Cert == NULL || SingleX509Cert == NULL || CertSize > INT_MAX) { 48 return FALSE; 49 } 50 51 // 52 // Read DER-encoded X509 Certificate and Construct X509 object. 53 // 54 Temp = Cert; 55 X509Cert = d2i_X509 (NULL, &Temp, (long) CertSize); 56 if (X509Cert == NULL) { 57 return FALSE; 58 } 59 60 *SingleX509Cert = (UINT8 *) X509Cert; 61 62 return TRUE; 63 } 64 65 /** 66 Construct a X509 stack object from a list of DER-encoded certificate data. 67 68 If X509Stack is NULL, then return FALSE. 69 70 @param[in, out] X509Stack On input, pointer to an existing or NULL X509 stack object. 71 On output, pointer to the X509 stack object with new 72 inserted X509 certificate. 73 @param ... A list of DER-encoded single certificate data followed 74 by certificate size. A NULL terminates the list. The 75 pairs are the arguments to X509ConstructCertificate(). 76 77 @retval TRUE The X509 stack construction succeeded. 78 @retval FALSE The construction operation failed. 79 80 **/ 81 BOOLEAN 82 EFIAPI 83 X509ConstructCertificateStack ( 84 IN OUT UINT8 **X509Stack, 85 ... 86 ) 87 { 88 UINT8 *Cert; 89 UINTN CertSize; 90 X509 *X509Cert; 91 STACK_OF(X509) *CertStack; 92 BOOLEAN Status; 93 VA_LIST Args; 94 UINTN Index; 95 96 // 97 // Check input parameters. 98 // 99 if (X509Stack == NULL) { 100 return FALSE; 101 } 102 103 Status = FALSE; 104 105 // 106 // Initialize X509 stack object. 107 // 108 CertStack = (STACK_OF(X509) *) (*X509Stack); 109 if (CertStack == NULL) { 110 CertStack = sk_X509_new_null (); 111 if (CertStack == NULL) { 112 return Status; 113 } 114 } 115 116 VA_START (Args, X509Stack); 117 118 for (Index = 0; ; Index++) { 119 // 120 // If Cert is NULL, then it is the end of the list. 121 // 122 Cert = VA_ARG (Args, UINT8 *); 123 if (Cert == NULL) { 124 break; 125 } 126 127 CertSize = VA_ARG (Args, UINTN); 128 if (CertSize == 0) { 129 break; 130 } 131 132 // 133 // Construct X509 Object from the given DER-encoded certificate data. 134 // 135 X509Cert = NULL; 136 Status = X509ConstructCertificate ( 137 (CONST UINT8 *) Cert, 138 CertSize, 139 (UINT8 **) &X509Cert 140 ); 141 if (!Status) { 142 if (X509Cert != NULL) { 143 X509_free (X509Cert); 144 } 145 break; 146 } 147 148 // 149 // Insert the new X509 object into X509 stack object. 150 // 151 sk_X509_push (CertStack, X509Cert); 152 } 153 154 VA_END (Args); 155 156 if (!Status) { 157 sk_X509_pop_free (CertStack, X509_free); 158 } else { 159 *X509Stack = (UINT8 *) CertStack; 160 } 161 162 return Status; 163 } 164 165 /** 166 Release the specified X509 object. 167 168 If X509Cert is NULL, then return FALSE. 169 170 @param[in] X509Cert Pointer to the X509 object to be released. 171 172 **/ 173 VOID 174 EFIAPI 175 X509Free ( 176 IN VOID *X509Cert 177 ) 178 { 179 // 180 // Check input parameters. 181 // 182 if (X509Cert == NULL) { 183 return; 184 } 185 186 // 187 // Free OpenSSL X509 object. 188 // 189 X509_free ((X509 *) X509Cert); 190 } 191 192 /** 193 Release the specified X509 stack object. 194 195 If X509Stack is NULL, then return FALSE. 196 197 @param[in] X509Stack Pointer to the X509 stack object to be released. 198 199 **/ 200 VOID 201 EFIAPI 202 X509StackFree ( 203 IN VOID *X509Stack 204 ) 205 { 206 // 207 // Check input parameters. 208 // 209 if (X509Stack == NULL) { 210 return; 211 } 212 213 // 214 // Free OpenSSL X509 stack object. 215 // 216 sk_X509_pop_free ((STACK_OF(X509) *) X509Stack, X509_free); 217 } 218 219 /** 220 Retrieve the subject bytes from one X.509 certificate. 221 222 @param[in] Cert Pointer to the DER-encoded X509 certificate. 223 @param[in] CertSize Size of the X509 certificate in bytes. 224 @param[out] CertSubject Pointer to the retrieved certificate subject bytes. 225 @param[in, out] SubjectSize The size in bytes of the CertSubject buffer on input, 226 and the size of buffer returned CertSubject on output. 227 228 If Cert is NULL, then return FALSE. 229 If SubjectSize is NULL, then return FALSE. 230 231 @retval TRUE The certificate subject retrieved successfully. 232 @retval FALSE Invalid certificate, or the SubjectSize is too small for the result. 233 The SubjectSize will be updated with the required size. 234 235 **/ 236 BOOLEAN 237 EFIAPI 238 X509GetSubjectName ( 239 IN CONST UINT8 *Cert, 240 IN UINTN CertSize, 241 OUT UINT8 *CertSubject, 242 IN OUT UINTN *SubjectSize 243 ) 244 { 245 BOOLEAN Status; 246 X509 *X509Cert; 247 X509_NAME *X509Name; 248 UINTN X509NameSize; 249 250 // 251 // Check input parameters. 252 // 253 if (Cert == NULL || SubjectSize == NULL) { 254 return FALSE; 255 } 256 257 X509Cert = NULL; 258 259 // 260 // Read DER-encoded X509 Certificate and Construct X509 object. 261 // 262 Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert); 263 if ((X509Cert == NULL) || (!Status)) { 264 Status = FALSE; 265 goto _Exit; 266 } 267 268 Status = FALSE; 269 270 // 271 // Retrieve subject name from certificate object. 272 // 273 X509Name = X509_get_subject_name (X509Cert); 274 if (X509Name == NULL) { 275 goto _Exit; 276 } 277 278 X509NameSize = i2d_X509_NAME(X509Name, NULL); 279 if (*SubjectSize < X509NameSize) { 280 *SubjectSize = X509NameSize; 281 goto _Exit; 282 } 283 *SubjectSize = X509NameSize; 284 if (CertSubject != NULL) { 285 i2d_X509_NAME(X509Name, &CertSubject); 286 Status = TRUE; 287 } 288 289 _Exit: 290 // 291 // Release Resources. 292 // 293 if (X509Cert != NULL) { 294 X509_free (X509Cert); 295 } 296 297 return Status; 298 } 299 300 /** 301 Retrieve the RSA Public Key from one DER-encoded X509 certificate. 302 303 @param[in] Cert Pointer to the DER-encoded X509 certificate. 304 @param[in] CertSize Size of the X509 certificate in bytes. 305 @param[out] RsaContext Pointer to new-generated RSA context which contain the retrieved 306 RSA public key component. Use RsaFree() function to free the 307 resource. 308 309 If Cert is NULL, then return FALSE. 310 If RsaContext is NULL, then return FALSE. 311 312 @retval TRUE RSA Public Key was retrieved successfully. 313 @retval FALSE Fail to retrieve RSA public key from X509 certificate. 314 315 **/ 316 BOOLEAN 317 EFIAPI 318 RsaGetPublicKeyFromX509 ( 319 IN CONST UINT8 *Cert, 320 IN UINTN CertSize, 321 OUT VOID **RsaContext 322 ) 323 { 324 BOOLEAN Status; 325 EVP_PKEY *Pkey; 326 X509 *X509Cert; 327 328 // 329 // Check input parameters. 330 // 331 if (Cert == NULL || RsaContext == NULL) { 332 return FALSE; 333 } 334 335 Pkey = NULL; 336 X509Cert = NULL; 337 338 // 339 // Read DER-encoded X509 Certificate and Construct X509 object. 340 // 341 Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert); 342 if ((X509Cert == NULL) || (!Status)) { 343 Status = FALSE; 344 goto _Exit; 345 } 346 347 Status = FALSE; 348 349 // 350 // Retrieve and check EVP_PKEY data from X509 Certificate. 351 // 352 Pkey = X509_get_pubkey (X509Cert); 353 if ((Pkey == NULL) || (Pkey->type != EVP_PKEY_RSA)) { 354 goto _Exit; 355 } 356 357 // 358 // Duplicate RSA Context from the retrieved EVP_PKEY. 359 // 360 if ((*RsaContext = RSAPublicKey_dup (Pkey->pkey.rsa)) != NULL) { 361 Status = TRUE; 362 } 363 364 _Exit: 365 // 366 // Release Resources. 367 // 368 if (X509Cert != NULL) { 369 X509_free (X509Cert); 370 } 371 372 if (Pkey != NULL) { 373 EVP_PKEY_free (Pkey); 374 } 375 376 return Status; 377 } 378 379 /** 380 Verify one X509 certificate was issued by the trusted CA. 381 382 @param[in] Cert Pointer to the DER-encoded X509 certificate to be verified. 383 @param[in] CertSize Size of the X509 certificate in bytes. 384 @param[in] CACert Pointer to the DER-encoded trusted CA certificate. 385 @param[in] CACertSize Size of the CA Certificate in bytes. 386 387 If Cert is NULL, then return FALSE. 388 If CACert is NULL, then return FALSE. 389 390 @retval TRUE The certificate was issued by the trusted CA. 391 @retval FALSE Invalid certificate or the certificate was not issued by the given 392 trusted CA. 393 394 **/ 395 BOOLEAN 396 EFIAPI 397 X509VerifyCert ( 398 IN CONST UINT8 *Cert, 399 IN UINTN CertSize, 400 IN CONST UINT8 *CACert, 401 IN UINTN CACertSize 402 ) 403 { 404 BOOLEAN Status; 405 X509 *X509Cert; 406 X509 *X509CACert; 407 X509_STORE *CertStore; 408 X509_STORE_CTX CertCtx; 409 410 // 411 // Check input parameters. 412 // 413 if (Cert == NULL || CACert == NULL) { 414 return FALSE; 415 } 416 417 Status = FALSE; 418 X509Cert = NULL; 419 X509CACert = NULL; 420 CertStore = NULL; 421 422 // 423 // Register & Initialize necessary digest algorithms for certificate verification. 424 // 425 if (EVP_add_digest (EVP_md5 ()) == 0) { 426 goto _Exit; 427 } 428 if (EVP_add_digest (EVP_sha1 ()) == 0) { 429 goto _Exit; 430 } 431 if (EVP_add_digest (EVP_sha256 ()) == 0) { 432 goto _Exit; 433 } 434 435 // 436 // Read DER-encoded certificate to be verified and Construct X509 object. 437 // 438 Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert); 439 if ((X509Cert == NULL) || (!Status)) { 440 Status = FALSE; 441 goto _Exit; 442 } 443 444 // 445 // Read DER-encoded root certificate and Construct X509 object. 446 // 447 Status = X509ConstructCertificate (CACert, CACertSize, (UINT8 **) &X509CACert); 448 if ((X509CACert == NULL) || (!Status)) { 449 Status = FALSE; 450 goto _Exit; 451 } 452 453 Status = FALSE; 454 455 // 456 // Set up X509 Store for trusted certificate. 457 // 458 CertStore = X509_STORE_new (); 459 if (CertStore == NULL) { 460 goto _Exit; 461 } 462 if (!(X509_STORE_add_cert (CertStore, X509CACert))) { 463 goto _Exit; 464 } 465 466 // 467 // Allow partial certificate chains, terminated by a non-self-signed but 468 // still trusted intermediate certificate. Also disable time checks. 469 // 470 X509_STORE_set_flags (CertStore, 471 X509_V_FLAG_PARTIAL_CHAIN | X509_V_FLAG_NO_CHECK_TIME); 472 473 // 474 // Set up X509_STORE_CTX for the subsequent verification operation. 475 // 476 if (!X509_STORE_CTX_init (&CertCtx, CertStore, X509Cert, NULL)) { 477 goto _Exit; 478 } 479 480 // 481 // X509 Certificate Verification. 482 // 483 Status = (BOOLEAN) X509_verify_cert (&CertCtx); 484 X509_STORE_CTX_cleanup (&CertCtx); 485 486 _Exit: 487 // 488 // Release Resources. 489 // 490 if (X509Cert != NULL) { 491 X509_free (X509Cert); 492 } 493 494 if (X509CACert != NULL) { 495 X509_free (X509CACert); 496 } 497 498 if (CertStore != NULL) { 499 X509_STORE_free (CertStore); 500 } 501 502 return Status; 503 } 504 505 /** 506 Retrieve the TBSCertificate from one given X.509 certificate. 507 508 @param[in] Cert Pointer to the given DER-encoded X509 certificate. 509 @param[in] CertSize Size of the X509 certificate in bytes. 510 @param[out] TBSCert DER-Encoded To-Be-Signed certificate. 511 @param[out] TBSCertSize Size of the TBS certificate in bytes. 512 513 If Cert is NULL, then return FALSE. 514 If TBSCert is NULL, then return FALSE. 515 If TBSCertSize is NULL, then return FALSE. 516 517 @retval TRUE The TBSCertificate was retrieved successfully. 518 @retval FALSE Invalid X.509 certificate. 519 520 **/ 521 BOOLEAN 522 EFIAPI 523 X509GetTBSCert ( 524 IN CONST UINT8 *Cert, 525 IN UINTN CertSize, 526 OUT UINT8 **TBSCert, 527 OUT UINTN *TBSCertSize 528 ) 529 { 530 CONST UINT8 *Temp; 531 INTN Asn1Tag; 532 INTN ObjClass; 533 UINTN Length; 534 535 // 536 // Check input parameters. 537 // 538 if ((Cert == NULL) || (TBSCert == NULL) || 539 (TBSCertSize == NULL) || (CertSize > INT_MAX)) { 540 return FALSE; 541 } 542 543 // 544 // An X.509 Certificate is: (defined in RFC3280) 545 // Certificate ::= SEQUENCE { 546 // tbsCertificate TBSCertificate, 547 // signatureAlgorithm AlgorithmIdentifier, 548 // signature BIT STRING } 549 // 550 // and 551 // 552 // TBSCertificate ::= SEQUENCE { 553 // version [0] Version DEFAULT v1, 554 // ... 555 // } 556 // 557 // So we can just ASN1-parse the x.509 DER-encoded data. If we strip 558 // the first SEQUENCE, the second SEQUENCE is the TBSCertificate. 559 // 560 Temp = Cert; 561 ASN1_get_object (&Temp, (long *)&Length, (int *)&Asn1Tag, (int *)&ObjClass, (long)CertSize); 562 563 if (Asn1Tag != V_ASN1_SEQUENCE) { 564 return FALSE; 565 } 566 567 *TBSCert = (UINT8 *)Temp; 568 569 ASN1_get_object (&Temp, (long *)&Length, (int *)&Asn1Tag, (int *)&ObjClass, (long)Length); 570 // 571 // Verify the parsed TBSCertificate is one correct SEQUENCE data. 572 // 573 if (Asn1Tag != V_ASN1_SEQUENCE) { 574 return FALSE; 575 } 576 577 *TBSCertSize = Length + (Temp - *TBSCert); 578 579 return TRUE; 580 } 581
