[mirror_edk2.git] / CryptoPkg / Library / BaseCryptLib / Pk / CryptX509.c

/** @file\r
  X.509 Certificate Handler Wrapper Implementation over OpenSSL.\r
\r
Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "InternalCryptLib.h"\r
#include <openssl/x509.h>\r
#include <openssl/rsa.h>\r
\r
/**\r
  Construct a X509 object from DER-encoded certificate data.\r
\r
  If Cert is NULL, then return FALSE.\r
  If SingleX509Cert is NULL, then return FALSE.\r
\r
  @param[in]  Cert            Pointer to the DER-encoded certificate data.\r
  @param[in]  CertSize        The size of certificate data in bytes.\r
  @param[out] SingleX509Cert  The generated X509 object.\r
\r
  @retval     TRUE            The X509 object generation succeeded.\r
  @retval     FALSE           The operation failed.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
X509ConstructCertificate (\r
  IN   CONST UINT8  *Cert,\r
  IN   UINTN        CertSize,\r
  OUT  UINT8        **SingleX509Cert\r
  )\r
{\r
  X509         *X509Cert;\r
  CONST UINT8  *Temp;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (Cert == NULL || SingleX509Cert == NULL || CertSize > INT_MAX) {\r
    return FALSE;\r
  }\r
\r
  //\r
  // Read DER-encoded X509 Certificate and Construct X509 object.\r
  //\r
  Temp     = Cert;\r
  X509Cert = d2i_X509 (NULL, &Temp, (long) CertSize);\r
  if (X509Cert == NULL) {\r
    return FALSE;\r
  }\r
\r
  *SingleX509Cert = (UINT8 *) X509Cert;\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Construct a X509 stack object from a list of DER-encoded certificate data.\r
\r
  If X509Stack is NULL, then return FALSE.\r
\r
  @param[in, out]  X509Stack  On input, pointer to an existing or NULL X509 stack object.\r
                              On output, pointer to the X509 stack object with new\r
                              inserted X509 certificate.\r
  @param           ...        A list of DER-encoded single certificate data followed\r
                              by certificate size. A NULL terminates the list. The\r
                              pairs are the arguments to X509ConstructCertificate().\r
\r
  @retval     TRUE            The X509 stack construction succeeded.\r
  @retval     FALSE           The construction operation failed.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
X509ConstructCertificateStack (\r
  IN OUT  UINT8  **X509Stack,\r
  ...\r
  )\r
{\r
  UINT8           *Cert;\r
  UINTN           CertSize;\r
  X509            *X509Cert;\r
  STACK_OF(X509)  *CertStack;\r
  BOOLEAN         Status;\r
  VA_LIST         Args;\r
  UINTN           Index;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (X509Stack == NULL) {\r
    return FALSE;\r
  }\r
\r
  Status = FALSE;\r
\r
  //\r
  // Initialize X509 stack object.\r
  //\r
  CertStack = (STACK_OF(X509) *) (*X509Stack);\r
  if (CertStack == NULL) {\r
    CertStack = sk_X509_new_null ();\r
    if (CertStack == NULL) {\r
      return Status;\r
    }\r
  }\r
\r
  VA_START (Args, X509Stack);\r
\r
  for (Index = 0; ; Index++) {\r
    //\r
    // If Cert is NULL, then it is the end of the list.\r
    //\r
    Cert = VA_ARG (Args, UINT8 *);\r
    if (Cert == NULL) {\r
      break;\r
    }\r
\r
    CertSize = VA_ARG (Args, UINTN);\r
    if (CertSize == 0) {\r
      break;\r
    }\r
\r
    //\r
    // Construct X509 Object from the given DER-encoded certificate data.\r
    //\r
    X509Cert = NULL;\r
    Status = X509ConstructCertificate (\r
               (CONST UINT8 *) Cert,\r
               CertSize,\r
               (UINT8 **) &X509Cert\r
               );\r
    if (!Status) {\r
      if (X509Cert != NULL) {\r
        X509_free (X509Cert);\r
      }\r
      break;\r
    }\r
\r
    //\r
    // Insert the new X509 object into X509 stack object.\r
    //\r
    sk_X509_push (CertStack, X509Cert);\r
  }\r
\r
  VA_END (Args);\r
\r
  if (!Status) {\r
    sk_X509_pop_free (CertStack, X509_free);\r
  } else {\r
    *X509Stack = (UINT8 *) CertStack;\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Release the specified X509 object.\r
\r
  If X509Cert is NULL, then return FALSE.\r
\r
  @param[in]  X509Cert  Pointer to the X509 object to be released.\r
\r
**/\r
VOID\r
EFIAPI\r
X509Free (\r
  IN  VOID  *X509Cert\r
  )\r
{\r
  //\r
  // Check input parameters.\r
  //\r
  if (X509Cert == NULL) {\r
    return;\r
  }\r
\r
  //\r
  // Free OpenSSL X509 object.\r
  //\r
  X509_free ((X509 *) X509Cert);\r
}\r
\r
/**\r
  Release the specified X509 stack object.\r
\r
  If X509Stack is NULL, then return FALSE.\r
\r
  @param[in]  X509Stack  Pointer to the X509 stack object to be released.\r
\r
**/\r
VOID\r
EFIAPI\r
X509StackFree (\r
  IN  VOID  *X509Stack\r
  )\r
{\r
  //\r
  // Check input parameters.\r
  //\r
  if (X509Stack == NULL) {\r
    return;\r
  }\r
\r
  //\r
  // Free OpenSSL X509 stack object.\r
  //\r
  sk_X509_pop_free ((STACK_OF(X509) *) X509Stack, X509_free);\r
}\r
\r
/**\r
  Retrieve the subject bytes from one X.509 certificate.\r
\r
  @param[in]      Cert         Pointer to the DER-encoded X509 certificate.\r
  @param[in]      CertSize     Size of the X509 certificate in bytes.\r
  @param[out]     CertSubject  Pointer to the retrieved certificate subject bytes.\r
  @param[in, out] SubjectSize  The size in bytes of the CertSubject buffer on input,\r
                               and the size of buffer returned CertSubject on output.\r
\r
  If Cert is NULL, then return FALSE.\r
  If SubjectSize is NULL, then return FALSE.\r
\r
  @retval  TRUE   The certificate subject retrieved successfully.\r
  @retval  FALSE  Invalid certificate, or the SubjectSize is too small for the result.\r
                  The SubjectSize will be updated with the required size.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
X509GetSubjectName (\r
  IN      CONST UINT8  *Cert,\r
  IN      UINTN        CertSize,\r
  OUT     UINT8        *CertSubject,\r
  IN OUT  UINTN        *SubjectSize\r
  )\r
{\r
  BOOLEAN    Status;\r
  X509       *X509Cert;\r
  X509_NAME  *X509Name;\r
  UINTN      X509NameSize;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (Cert == NULL || SubjectSize == NULL) {\r
    return FALSE;\r
  }\r
\r
  X509Cert = NULL;\r
\r
  //\r
  // Read DER-encoded X509 Certificate and Construct X509 object.\r
  //\r
  Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
  if ((X509Cert == NULL) || (!Status)) {\r
    Status = FALSE;\r
    goto _Exit;\r
  }\r
\r
  Status = FALSE;\r
\r
  //\r
  // Retrieve subject name from certificate object.\r
  //\r
  X509Name = X509_get_subject_name (X509Cert);\r
  if (X509Name == NULL) {\r
    goto _Exit;\r
  }\r
\r
  X509NameSize = i2d_X509_NAME(X509Name, NULL);\r
  if (*SubjectSize < X509NameSize) {\r
    *SubjectSize = X509NameSize;\r
    goto _Exit;\r
  }\r
  *SubjectSize = X509NameSize;\r
  if (CertSubject != NULL) {\r
    i2d_X509_NAME(X509Name, &CertSubject);\r
    Status = TRUE;\r
  }\r
\r
_Exit:\r
  //\r
  // Release Resources.\r
  //\r
  if (X509Cert != NULL) {\r
    X509_free (X509Cert);\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Retrieve the common name (CN) string from one X.509 certificate.\r
\r
  @param[in]      Cert             Pointer to the DER-encoded X509 certificate.\r
  @param[in]      CertSize         Size of the X509 certificate in bytes.\r
  @param[out]     CommonName       Buffer to contain the retrieved certificate common\r
                                   name string. At most CommonNameSize bytes will be\r
                                   written and the string will be null terminated. May be\r
                                   NULL in order to determine the size buffer needed.\r
  @param[in,out]  CommonNameSize   The size in bytes of the CommonName buffer on input,\r
                                   and the size of buffer returned CommonName on output.\r
                                   If CommonName is NULL then the amount of space needed\r
                                   in buffer (including the final null) is returned.\r
\r
  @retval RETURN_SUCCESS           The certificate CommonName retrieved successfully.\r
  @retval RETURN_INVALID_PARAMETER If Cert is NULL.\r
                                   If CommonNameSize is NULL.\r
                                   If CommonName is not NULL and *CommonNameSize is 0.\r
                                   If Certificate is invalid.\r
  @retval RETURN_NOT_FOUND         If no CommonName entry exists.\r
  @retval RETURN_BUFFER_TOO_SMALL  If the CommonName is NULL. The required buffer size\r
                                   (including the final null) is returned in the \r
                                   CommonNameSize parameter.\r
  @retval RETURN_UNSUPPORTED       The operation is not supported.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
X509GetCommonName (\r
  IN      CONST UINT8  *Cert,\r
  IN      UINTN        CertSize,\r
  OUT     CHAR8        *CommonName,  OPTIONAL\r
  IN OUT  UINTN        *CommonNameSize\r
  )\r
{\r
  RETURN_STATUS  ReturnStatus;\r
  BOOLEAN        Status;\r
  X509           *X509Cert;\r
  X509_NAME      *X509Name;\r
  INTN           Length;\r
\r
  ReturnStatus = RETURN_INVALID_PARAMETER;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if ((Cert == NULL) || (CertSize > INT_MAX) || (CommonNameSize == NULL)) {\r
    return ReturnStatus;\r
  }\r
  if ((CommonName != NULL) && (*CommonNameSize == 0)) {\r
    return ReturnStatus;\r
  }\r
\r
  X509Cert = NULL;\r
  //\r
  // Read DER-encoded X509 Certificate and Construct X509 object.\r
  //\r
  Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
  if ((X509Cert == NULL) || (!Status)) {\r
    //\r
    // Invalid X.509 Certificate\r
    //\r
    goto _Exit;\r
  }\r
\r
  Status = FALSE;\r
\r
  //\r
  // Retrieve subject name from certificate object.\r
  //\r
  X509Name = X509_get_subject_name (X509Cert);\r
  if (X509Name == NULL) {\r
    //\r
    // Fail to retrieve subject name content\r
    //\r
    goto _Exit;\r
  }\r
\r
  //\r
  // Retrieve the CommonName information from X.509 Subject\r
  //\r
  Length = (INTN) X509_NAME_get_text_by_NID (X509Name, NID_commonName, CommonName, (int)(*CommonNameSize));\r
  if (Length < 0) {\r
    //\r
    // No CommonName entry exists in X509_NAME object\r
    //\r
    *CommonNameSize = 0;\r
    ReturnStatus    = RETURN_NOT_FOUND;\r
    goto _Exit;\r
  }\r
\r
  *CommonNameSize = (UINTN)(Length + 1);\r
  if (CommonName == NULL) {\r
    ReturnStatus = RETURN_BUFFER_TOO_SMALL;\r
  } else {\r
    ReturnStatus = RETURN_SUCCESS;\r
  }\r
\r
_Exit:\r
  //\r
  // Release Resources.\r
  //\r
  if (X509Cert != NULL) {\r
    X509_free (X509Cert);\r
  }\r
\r
  return ReturnStatus;\r
}\r
\r
/**\r
  Retrieve the RSA Public Key from one DER-encoded X509 certificate.\r
\r
  @param[in]  Cert         Pointer to the DER-encoded X509 certificate.\r
  @param[in]  CertSize     Size of the X509 certificate in bytes.\r
  @param[out] RsaContext   Pointer to new-generated RSA context which contain the retrieved\r
                           RSA public key component. Use RsaFree() function to free the\r
                           resource.\r
\r
  If Cert is NULL, then return FALSE.\r
  If RsaContext is NULL, then return FALSE.\r
\r
  @retval  TRUE   RSA Public Key was retrieved successfully.\r
  @retval  FALSE  Fail to retrieve RSA public key from X509 certificate.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaGetPublicKeyFromX509 (\r
  IN   CONST UINT8  *Cert,\r
  IN   UINTN        CertSize,\r
  OUT  VOID         **RsaContext\r
  )\r
{\r
  BOOLEAN   Status;\r
  EVP_PKEY  *Pkey;\r
  X509      *X509Cert;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (Cert == NULL || RsaContext == NULL) {\r
    return FALSE;\r
  }\r
\r
  Pkey     = NULL;\r
  X509Cert = NULL;\r
\r
  //\r
  // Read DER-encoded X509 Certificate and Construct X509 object.\r
  //\r
  Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
  if ((X509Cert == NULL) || (!Status)) {\r
    Status = FALSE;\r
    goto _Exit;\r
  }\r
\r
  Status = FALSE;\r
\r
  //\r
  // Retrieve and check EVP_PKEY data from X509 Certificate.\r
  //\r
  Pkey = X509_get_pubkey (X509Cert);\r
  if ((Pkey == NULL) || (EVP_PKEY_id (Pkey) != EVP_PKEY_RSA)) {\r
    goto _Exit;\r
  }\r
\r
  //\r
  // Duplicate RSA Context from the retrieved EVP_PKEY.\r
  //\r
  if ((*RsaContext = RSAPublicKey_dup (EVP_PKEY_get0_RSA (Pkey))) != NULL) {\r
    Status = TRUE;\r
  }\r
\r
_Exit:\r
  //\r
  // Release Resources.\r
  //\r
  if (X509Cert != NULL) {\r
    X509_free (X509Cert);\r
  }\r
\r
  if (Pkey != NULL) {\r
    EVP_PKEY_free (Pkey);\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Verify one X509 certificate was issued by the trusted CA.\r
\r
  @param[in]      Cert         Pointer to the DER-encoded X509 certificate to be verified.\r
  @param[in]      CertSize     Size of the X509 certificate in bytes.\r
  @param[in]      CACert       Pointer to the DER-encoded trusted CA certificate.\r
  @param[in]      CACertSize   Size of the CA Certificate in bytes.\r
\r
  If Cert is NULL, then return FALSE.\r
  If CACert is NULL, then return FALSE.\r
\r
  @retval  TRUE   The certificate was issued by the trusted CA.\r
  @retval  FALSE  Invalid certificate or the certificate was not issued by the given\r
                  trusted CA.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
X509VerifyCert (\r
  IN  CONST UINT8  *Cert,\r
  IN  UINTN        CertSize,\r
  IN  CONST UINT8  *CACert,\r
  IN  UINTN        CACertSize\r
  )\r
{\r
  BOOLEAN         Status;\r
  X509            *X509Cert;\r
  X509            *X509CACert;\r
  X509_STORE      *CertStore;\r
  X509_STORE_CTX  *CertCtx;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (Cert == NULL || CACert == NULL) {\r
    return FALSE;\r
  }\r
\r
  Status     = FALSE;\r
  X509Cert   = NULL;\r
  X509CACert = NULL;\r
  CertStore  = NULL;\r
  CertCtx    = NULL;\r
\r
  //\r
  // Register & Initialize necessary digest algorithms for certificate verification.\r
  //\r
  if (EVP_add_digest (EVP_md5 ()) == 0) {\r
    goto _Exit;\r
  }\r
  if (EVP_add_digest (EVP_sha1 ()) == 0) {\r
    goto _Exit;\r
  }\r
  if (EVP_add_digest (EVP_sha256 ()) == 0) {\r
    goto _Exit;\r
  }\r
\r
  //\r
  // Read DER-encoded certificate to be verified and Construct X509 object.\r
  //\r
  Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
  if ((X509Cert == NULL) || (!Status)) {\r
    Status = FALSE;\r
    goto _Exit;\r
  }\r
\r
  //\r
  // Read DER-encoded root certificate and Construct X509 object.\r
  //\r
  Status = X509ConstructCertificate (CACert, CACertSize, (UINT8 **) &X509CACert);\r
  if ((X509CACert == NULL) || (!Status)) {\r
    Status = FALSE;\r
    goto _Exit;\r
  }\r
\r
  Status = FALSE;\r
\r
  //\r
  // Set up X509 Store for trusted certificate.\r
  //\r
  CertStore = X509_STORE_new ();\r
  if (CertStore == NULL) {\r
    goto _Exit;\r
  }\r
  if (!(X509_STORE_add_cert (CertStore, X509CACert))) {\r
    goto _Exit;\r
  }\r
\r
  //\r
  // Allow partial certificate chains, terminated by a non-self-signed but\r
  // still trusted intermediate certificate. Also disable time checks.\r
  //\r
  X509_STORE_set_flags (CertStore,\r
                        X509_V_FLAG_PARTIAL_CHAIN | X509_V_FLAG_NO_CHECK_TIME);\r
\r
  //\r
  // Set up X509_STORE_CTX for the subsequent verification operation.\r
  //\r
  CertCtx = X509_STORE_CTX_new ();\r
  if (CertCtx == NULL) {\r
    goto _Exit;\r
  }\r
  if (!X509_STORE_CTX_init (CertCtx, CertStore, X509Cert, NULL)) {\r
    goto _Exit;\r
  }\r
\r
  //\r
  // X509 Certificate Verification.\r
  //\r
  Status = (BOOLEAN) X509_verify_cert (CertCtx);\r
  X509_STORE_CTX_cleanup (CertCtx);\r
\r
_Exit:\r
  //\r
  // Release Resources.\r
  //\r
  if (X509Cert != NULL) {\r
    X509_free (X509Cert);\r
  }\r
\r
  if (X509CACert != NULL) {\r
    X509_free (X509CACert);\r
  }\r
\r
  if (CertStore != NULL) {\r
    X509_STORE_free (CertStore);\r
  }\r
\r
  X509_STORE_CTX_free (CertCtx);\r
\r
  return Status;\r
}\r
\r
/**\r
  Retrieve the TBSCertificate from one given X.509 certificate.\r
\r
  @param[in]      Cert         Pointer to the given DER-encoded X509 certificate.\r
  @param[in]      CertSize     Size of the X509 certificate in bytes.\r
  @param[out]     TBSCert      DER-Encoded To-Be-Signed certificate.\r
  @param[out]     TBSCertSize  Size of the TBS certificate in bytes.\r
\r
  If Cert is NULL, then return FALSE.\r
  If TBSCert is NULL, then return FALSE.\r
  If TBSCertSize is NULL, then return FALSE.\r
\r
  @retval  TRUE   The TBSCertificate was retrieved successfully.\r
  @retval  FALSE  Invalid X.509 certificate.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
X509GetTBSCert (\r
  IN  CONST UINT8  *Cert,\r
  IN  UINTN        CertSize,\r
  OUT UINT8        **TBSCert,\r
  OUT UINTN        *TBSCertSize\r
  )\r
{\r
  CONST UINT8  *Temp;\r
  UINT32       Asn1Tag;\r
  UINT32       ObjClass;\r
  UINTN        Length;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if ((Cert == NULL) || (TBSCert == NULL) ||\r
      (TBSCertSize == NULL) || (CertSize > INT_MAX)) {\r
    return FALSE;\r
  }\r
\r
  //\r
  // An X.509 Certificate is: (defined in RFC3280)\r
  //   Certificate  ::=  SEQUENCE  {\r
  //     tbsCertificate       TBSCertificate,\r
  //     signatureAlgorithm   AlgorithmIdentifier,\r
  //     signature            BIT STRING }\r
  //\r
  // and\r
  //\r
  //  TBSCertificate  ::=  SEQUENCE  {\r
  //    version         [0]  Version DEFAULT v1,\r
  //    ...\r
  //    }\r
  //\r
  // So we can just ASN1-parse the x.509 DER-encoded data. If we strip\r
  // the first SEQUENCE, the second SEQUENCE is the TBSCertificate.\r
  //\r
  Temp   = Cert;\r
  Length = 0;\r
  ASN1_get_object (&Temp, (long *)&Length, (int *)&Asn1Tag, (int *)&ObjClass, (long)CertSize);\r
\r
  if (Asn1Tag != V_ASN1_SEQUENCE) {\r
    return FALSE;\r
  }\r
\r
  *TBSCert = (UINT8 *)Temp;\r
\r
  ASN1_get_object (&Temp, (long *)&Length, (int *)&Asn1Tag, (int *)&ObjClass, (long)Length);\r
  //\r
  // Verify the parsed TBSCertificate is one correct SEQUENCE data.\r
  //\r
  if (Asn1Tag != V_ASN1_SEQUENCE) {\r
    return FALSE;\r
  }\r
\r
  *TBSCertSize = Length + (Temp - *TBSCert);\r
\r
  return TRUE;\r
}\r
Commit	Line	Data
4a567c96	1	/** @file\r
	2	X.509 Certificate Handler Wrapper Implementation over OpenSSL.\r
	3	\r
f56b11d2	4	Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
4a567c96	5	This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#include "InternalCryptLib.h"\r
	16	#include <openssl/x509.h>\r
1cae0c83	17	#include <openssl/rsa.h>\r
b7d320f8	18	\r
	19	/**\r
	20	Construct a X509 object from DER-encoded certificate data.\r
	21	\r
16d2c32c	22	If Cert is NULL, then return FALSE.\r
16d2c32c	23	If SingleX509Cert is NULL, then return FALSE.\r
b7d320f8	24	\r
	25	@param[in] Cert Pointer to the DER-encoded certificate data.\r
	26	@param[in] CertSize The size of certificate data in bytes.\r
	27	@param[out] SingleX509Cert The generated X509 object.\r
	28	\r
	29	@retval TRUE The X509 object generation succeeded.\r
	30	@retval FALSE The operation failed.\r
	31	\r
	32	**/\r
	33	BOOLEAN\r
	34	EFIAPI\r
	35	X509ConstructCertificate (\r
	36	IN CONST UINT8 *Cert,\r
	37	IN UINTN CertSize,\r
	38	OUT UINT8 **SingleX509Cert\r
	39	)\r
	40	{\r
1463ce18 QL	41	X509 *X509Cert;\r
1463ce18 QL	42	CONST UINT8 *Temp;\r
b7d320f8	43	\r
b7d320f8	44	//\r
16d2c32c	45	// Check input parameters.\r
b7d320f8	46	//\r
16d2c32c	47	if (Cert == NULL \|\| SingleX509Cert == NULL \|\| CertSize > INT_MAX) {\r
	48	return FALSE;\r
	49	}\r
da9e7418	50	\r
b7d320f8	51	//\r
	52	// Read DER-encoded X509 Certificate and Construct X509 object.\r
	53	//\r
1463ce18 QL	54	Temp = Cert;\r
1463ce18 QL	55	X509Cert = d2i_X509 (NULL, &Temp, (long) CertSize);\r
b7d320f8	56	if (X509Cert == NULL) {\r
02ee8d3b	57	return FALSE;\r
b7d320f8	58	}\r
	59	\r
	60	SingleX509Cert = (UINT8 ) X509Cert;\r
b7d320f8	61	\r
02ee8d3b	62	return TRUE;\r
b7d320f8	63	}\r
	64	\r
	65	/**\r
	66	Construct a X509 stack object from a list of DER-encoded certificate data.\r
	67	\r
16d2c32c	68	If X509Stack is NULL, then return FALSE.\r
b7d320f8	69	\r
952bd229	70	@param[in, out] X509Stack On input, pointer to an existing or NULL X509 stack object.\r
b7d320f8	71	On output, pointer to the X509 stack object with new\r
	72	inserted X509 certificate.\r
	73	@param ... A list of DER-encoded single certificate data followed\r
	74	by certificate size. A NULL terminates the list. The\r
	75	pairs are the arguments to X509ConstructCertificate().\r
f56b11d2	76	\r
b7d320f8	77	@retval TRUE The X509 stack construction succeeded.\r
	78	@retval FALSE The construction operation failed.\r
	79	\r
	80	**/\r
	81	BOOLEAN\r
	82	EFIAPI\r
	83	X509ConstructCertificateStack (\r
	84	IN OUT UINT8 **X509Stack,\r
f56b11d2	85	...\r
b7d320f8	86	)\r
	87	{\r
	88	UINT8 *Cert;\r
	89	UINTN CertSize;\r
	90	X509 *X509Cert;\r
	91	STACK_OF(X509) *CertStack;\r
	92	BOOLEAN Status;\r
	93	VA_LIST Args;\r
	94	UINTN Index;\r
	95	\r
	96	//\r
16d2c32c	97	// Check input parameters.\r
b7d320f8	98	//\r
16d2c32c	99	if (X509Stack == NULL) {\r
	100	return FALSE;\r
	101	}\r
b7d320f8	102	\r
	103	Status = FALSE;\r
	104	\r
	105	//\r
	106	// Initialize X509 stack object.\r
	107	//\r
	108	CertStack = (STACK_OF(X509) ) (X509Stack);\r
	109	if (CertStack == NULL) {\r
	110	CertStack = sk_X509_new_null ();\r
	111	if (CertStack == NULL) {\r
	112	return Status;\r
	113	}\r
	114	}\r
	115	\r
	116	VA_START (Args, X509Stack);\r
	117	\r
	118	for (Index = 0; ; Index++) {\r
	119	//\r
	120	// If Cert is NULL, then it is the end of the list.\r
	121	//\r
	122	Cert = VA_ARG (Args, UINT8 *);\r
	123	if (Cert == NULL) {\r
	124	break;\r
	125	}\r
	126	\r
	127	CertSize = VA_ARG (Args, UINTN);\r
1463ce18 QL	128	if (CertSize == 0) {\r
	129	break;\r
	130	}\r
b7d320f8	131	\r
	132	//\r
	133	// Construct X509 Object from the given DER-encoded certificate data.\r
	134	//\r
952bd229	135	X509Cert = NULL;\r
b7d320f8	136	Status = X509ConstructCertificate (\r
	137	(CONST UINT8 *) Cert,\r
	138	CertSize,\r
	139	(UINT8 **) &X509Cert\r
	140	);\r
	141	if (!Status) {\r
1463ce18 QL	142	if (X509Cert != NULL) {\r
	143	X509_free (X509Cert);\r
	144	}\r
b7d320f8	145	break;\r
	146	}\r
	147	\r
	148	//\r
	149	// Insert the new X509 object into X509 stack object.\r
	150	//\r
	151	sk_X509_push (CertStack, X509Cert);\r
	152	}\r
	153	\r
	154	VA_END (Args);\r
	155	\r
	156	if (!Status) {\r
	157	sk_X509_pop_free (CertStack, X509_free);\r
	158	} else {\r
	159	X509Stack = (UINT8 ) CertStack;\r
	160	}\r
	161	\r
	162	return Status;\r
	163	}\r
	164	\r
	165	/**\r
	166	Release the specified X509 object.\r
	167	\r
16d2c32c	168	If X509Cert is NULL, then return FALSE.\r
b7d320f8	169	\r
	170	@param[in] X509Cert Pointer to the X509 object to be released.\r
	171	\r
	172	**/\r
	173	VOID\r
	174	EFIAPI\r
	175	X509Free (\r
	176	IN VOID *X509Cert\r
	177	)\r
f56b11d2	178	{\r
16d2c32c	179	//\r
	180	// Check input parameters.\r
	181	//\r
	182	if (X509Cert == NULL) {\r
	183	return;\r
	184	}\r
f56b11d2	185	\r
b7d320f8	186	//\r
	187	// Free OpenSSL X509 object.\r
	188	//\r
	189	X509_free ((X509 *) X509Cert);\r
	190	}\r
	191	\r
	192	/**\r
	193	Release the specified X509 stack object.\r
	194	\r
16d2c32c	195	If X509Stack is NULL, then return FALSE.\r
b7d320f8	196	\r
	197	@param[in] X509Stack Pointer to the X509 stack object to be released.\r
	198	\r
	199	**/\r
	200	VOID\r
	201	EFIAPI\r
	202	X509StackFree (\r
	203	IN VOID *X509Stack\r
	204	)\r
	205	{\r
16d2c32c	206	//\r
	207	// Check input parameters.\r
	208	//\r
	209	if (X509Stack == NULL) {\r
	210	return;\r
	211	}\r
f56b11d2	212	\r
b7d320f8	213	//\r
	214	// Free OpenSSL X509 stack object.\r
	215	//\r
	216	sk_X509_pop_free ((STACK_OF(X509) *) X509Stack, X509_free);\r
	217	}\r
	218	\r
4a567c96	219	/**\r
	220	Retrieve the subject bytes from one X.509 certificate.\r
	221	\r
	222	@param[in] Cert Pointer to the DER-encoded X509 certificate.\r
	223	@param[in] CertSize Size of the X509 certificate in bytes.\r
	224	@param[out] CertSubject Pointer to the retrieved certificate subject bytes.\r
	225	@param[in, out] SubjectSize The size in bytes of the CertSubject buffer on input,\r
	226	and the size of buffer returned CertSubject on output.\r
	227	\r
16d2c32c	228	If Cert is NULL, then return FALSE.\r
16d2c32c	229	If SubjectSize is NULL, then return FALSE.\r
4a567c96	230	\r
	231	@retval TRUE The certificate subject retrieved successfully.\r
	232	@retval FALSE Invalid certificate, or the SubjectSize is too small for the result.\r
	233	The SubjectSize will be updated with the required size.\r
	234	\r
	235	**/\r
	236	BOOLEAN\r
	237	EFIAPI\r
	238	X509GetSubjectName (\r
	239	IN CONST UINT8 *Cert,\r
	240	IN UINTN CertSize,\r
	241	OUT UINT8 *CertSubject,\r
	242	IN OUT UINTN *SubjectSize\r
	243	)\r
	244	{\r
	245	BOOLEAN Status;\r
4a567c96	246	X509 *X509Cert;\r
4a567c96	247	X509_NAME *X509Name;\r
eeb8928a	248	UINTN X509NameSize;\r
4a567c96	249	\r
4a567c96	250	//\r
16d2c32c	251	// Check input parameters.\r
4a567c96	252	//\r
16d2c32c	253	if (Cert == NULL \|\| SubjectSize == NULL) {\r
	254	return FALSE;\r
	255	}\r
4a567c96	256	\r
4a567c96	257	X509Cert = NULL;\r
	258	\r
	259	//\r
	260	// Read DER-encoded X509 Certificate and Construct X509 object.\r
	261	//\r
b7d320f8	262	Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
b7d320f8	263	if ((X509Cert == NULL) \|\| (!Status)) {\r
dda39f3a	264	Status = FALSE;\r
4a567c96	265	goto _Exit;\r
	266	}\r
	267	\r
dda39f3a	268	Status = FALSE;\r
dda39f3a	269	\r
4a567c96	270	//\r
	271	// Retrieve subject name from certificate object.\r
	272	//\r
	273	X509Name = X509_get_subject_name (X509Cert);\r
dda39f3a	274	if (X509Name == NULL) {\r
	275	goto _Exit;\r
	276	}\r
	277	\r
eeb8928a DW	278	X509NameSize = i2d_X509_NAME(X509Name, NULL);\r
	279	if (*SubjectSize < X509NameSize) {\r
	280	*SubjectSize = X509NameSize;\r
4a567c96	281	goto _Exit;\r
4a567c96	282	}\r
eeb8928a	283	*SubjectSize = X509NameSize;\r
4a567c96	284	if (CertSubject != NULL) {\r
eeb8928a	285	i2d_X509_NAME(X509Name, &CertSubject);\r
4a567c96	286	Status = TRUE;\r
	287	}\r
	288	\r
	289	_Exit:\r
	290	//\r
	291	// Release Resources.\r
	292	//\r
dda39f3a	293	if (X509Cert != NULL) {\r
	294	X509_free (X509Cert);\r
	295	}\r
4a567c96	296	\r
	297	return Status;\r
	298	}\r
5b7c2245 QL	299	\r
	300	/**\r
	301	Retrieve the common name (CN) string from one X.509 certificate.\r
	302	\r
	303	@param[in] Cert Pointer to the DER-encoded X509 certificate.\r
	304	@param[in] CertSize Size of the X509 certificate in bytes.\r
	305	@param[out] CommonName Buffer to contain the retrieved certificate common\r
	306	name string. At most CommonNameSize bytes will be\r
	307	written and the string will be null terminated. May be\r
	308	NULL in order to determine the size buffer needed.\r
	309	@param[in,out] CommonNameSize The size in bytes of the CommonName buffer on input,\r
	310	and the size of buffer returned CommonName on output.\r
	311	If CommonName is NULL then the amount of space needed\r
	312	in buffer (including the final null) is returned.\r
	313	\r
	314	@retval RETURN_SUCCESS The certificate CommonName retrieved successfully.\r
	315	@retval RETURN_INVALID_PARAMETER If Cert is NULL.\r
	316	If CommonNameSize is NULL.\r
	317	If CommonName is not NULL and *CommonNameSize is 0.\r
	318	If Certificate is invalid.\r
	319	@retval RETURN_NOT_FOUND If no CommonName entry exists.\r
	320	@retval RETURN_BUFFER_TOO_SMALL If the CommonName is NULL. The required buffer size\r
	321	(including the final null) is returned in the \r
	322	CommonNameSize parameter.\r
	323	@retval RETURN_UNSUPPORTED The operation is not supported.\r
	324	\r
	325	**/\r
	326	RETURN_STATUS\r
	327	EFIAPI\r
	328	X509GetCommonName (\r
	329	IN CONST UINT8 *Cert,\r
	330	IN UINTN CertSize,\r
	331	OUT CHAR8 *CommonName, OPTIONAL\r
	332	IN OUT UINTN *CommonNameSize\r
	333	)\r
	334	{\r
	335	RETURN_STATUS ReturnStatus;\r
	336	BOOLEAN Status;\r
	337	X509 *X509Cert;\r
	338	X509_NAME *X509Name;\r
	339	INTN Length;\r
	340	\r
	341	ReturnStatus = RETURN_INVALID_PARAMETER;\r
	342	\r
	343	//\r
	344	// Check input parameters.\r
	345	//\r
	346	if ((Cert == NULL) \|\| (CertSize > INT_MAX) \|\| (CommonNameSize == NULL)) {\r
	347	return ReturnStatus;\r
	348	}\r
	349	if ((CommonName != NULL) && (*CommonNameSize == 0)) {\r
	350	return ReturnStatus;\r
	351	}\r
	352	\r
	353	X509Cert = NULL;\r
	354	//\r
	355	// Read DER-encoded X509 Certificate and Construct X509 object.\r
	356	//\r
	357	Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
	358	if ((X509Cert == NULL) \|\| (!Status)) {\r
	359	//\r
	360	// Invalid X.509 Certificate\r
	361	//\r
	362	goto _Exit;\r
363	}\r
364	\r
365	Status = FALSE;\r
366	\r
367	//\r
368	// Retrieve subject name from certificate object.\r
369	//\r
370	X509Name = X509_get_subject_name (X509Cert);\r
371	if (X509Name == NULL) {\r
372	//\r
373	// Fail to retrieve subject name content\r
374	//\r
375	goto _Exit;\r
376	}\r
377	\r
378	//\r
379	// Retrieve the CommonName information from X.509 Subject\r
380	//\r
381	Length = (INTN) X509_NAME_get_text_by_NID (X509Name, NID_commonName, CommonName, (int)(*CommonNameSize));\r
382	if (Length < 0) {\r
383	//\r
384	// No CommonName entry exists in X509_NAME object\r
385	//\r
386	*CommonNameSize = 0;\r
387	ReturnStatus = RETURN_NOT_FOUND;\r
388	goto _Exit;\r
389	}\r
390	\r
391	*CommonNameSize = (UINTN)(Length + 1);\r
392	if (CommonName == NULL) {\r
393	ReturnStatus = RETURN_BUFFER_TOO_SMALL;\r
394	} else {\r
395	ReturnStatus = RETURN_SUCCESS;\r
396	}\r
397	\r
398	_Exit:\r
399	//\r
400	// Release Resources.\r
401	//\r
402	if (X509Cert != NULL) {\r
403	X509_free (X509Cert);\r
404	}\r
405	\r
406	return ReturnStatus;\r
407	}\r
4a567c96	408	\r
	409	/**\r
	410	Retrieve the RSA Public Key from one DER-encoded X509 certificate.\r
	411	\r
	412	@param[in] Cert Pointer to the DER-encoded X509 certificate.\r
	413	@param[in] CertSize Size of the X509 certificate in bytes.\r
	414	@param[out] RsaContext Pointer to new-generated RSA context which contain the retrieved\r
	415	RSA public key component. Use RsaFree() function to free the\r
	416	resource.\r
	417	\r
16d2c32c	418	If Cert is NULL, then return FALSE.\r
16d2c32c	419	If RsaContext is NULL, then return FALSE.\r
4a567c96	420	\r
	421	@retval TRUE RSA Public Key was retrieved successfully.\r
	422	@retval FALSE Fail to retrieve RSA public key from X509 certificate.\r
	423	\r
	424	**/\r
	425	BOOLEAN\r
	426	EFIAPI\r
	427	RsaGetPublicKeyFromX509 (\r
	428	IN CONST UINT8 *Cert,\r
	429	IN UINTN CertSize,\r
	430	OUT VOID **RsaContext\r
	431	)\r
	432	{\r
	433	BOOLEAN Status;\r
	434	EVP_PKEY *Pkey;\r
4a567c96	435	X509 *X509Cert;\r
f56b11d2	436	\r
4a567c96	437	//\r
16d2c32c	438	// Check input parameters.\r
4a567c96	439	//\r
16d2c32c	440	if (Cert == NULL \|\| RsaContext == NULL) {\r
	441	return FALSE;\r
	442	}\r
4a567c96	443	\r
4a567c96	444	Pkey = NULL;\r
4a567c96	445	X509Cert = NULL;\r
	446	\r
	447	//\r
	448	// Read DER-encoded X509 Certificate and Construct X509 object.\r
	449	//\r
b7d320f8	450	Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
b7d320f8	451	if ((X509Cert == NULL) \|\| (!Status)) {\r
dda39f3a	452	Status = FALSE;\r
4a567c96	453	goto _Exit;\r
	454	}\r
	455	\r
dda39f3a	456	Status = FALSE;\r
dda39f3a	457	\r
4a567c96	458	//\r
	459	// Retrieve and check EVP_PKEY data from X509 Certificate.\r
	460	//\r
	461	Pkey = X509_get_pubkey (X509Cert);\r
f56b11d2	462	if ((Pkey == NULL) \|\| (EVP_PKEY_id (Pkey) != EVP_PKEY_RSA)) {\r
4a567c96	463	goto _Exit;\r
	464	}\r
	465	\r
	466	//\r
	467	// Duplicate RSA Context from the retrieved EVP_PKEY.\r
	468	//\r
f56b11d2	469	if ((*RsaContext = RSAPublicKey_dup (EVP_PKEY_get0_RSA (Pkey))) != NULL) {\r
4a567c96	470	Status = TRUE;\r
	471	}\r
	472	\r
	473	_Exit:\r
	474	//\r
	475	// Release Resources.\r
	476	//\r
dda39f3a	477	if (X509Cert != NULL) {\r
	478	X509_free (X509Cert);\r
	479	}\r
	480	\r
	481	if (Pkey != NULL) {\r
	482	EVP_PKEY_free (Pkey);\r
f56b11d2	483	}\r
4a567c96	484	\r
	485	return Status;\r
	486	}\r
	487	\r
	488	/**\r
	489	Verify one X509 certificate was issued by the trusted CA.\r
	490	\r
	491	@param[in] Cert Pointer to the DER-encoded X509 certificate to be verified.\r
	492	@param[in] CertSize Size of the X509 certificate in bytes.\r
	493	@param[in] CACert Pointer to the DER-encoded trusted CA certificate.\r
	494	@param[in] CACertSize Size of the CA Certificate in bytes.\r
	495	\r
16d2c32c	496	If Cert is NULL, then return FALSE.\r
16d2c32c	497	If CACert is NULL, then return FALSE.\r
4a567c96	498	\r
	499	@retval TRUE The certificate was issued by the trusted CA.\r
	500	@retval FALSE Invalid certificate or the certificate was not issued by the given\r
	501	trusted CA.\r
	502	\r
	503	**/\r
	504	BOOLEAN\r
	505	EFIAPI\r
	506	X509VerifyCert (\r
	507	IN CONST UINT8 *Cert,\r
	508	IN UINTN CertSize,\r
	509	IN CONST UINT8 *CACert,\r
	510	IN UINTN CACertSize\r
	511	)\r
	512	{\r
	513	BOOLEAN Status;\r
4a567c96	514	X509 *X509Cert;\r
	515	X509 *X509CACert;\r
	516	X509_STORE *CertStore;\r
f56b11d2 QL	517	X509_STORE_CTX *CertCtx;\r
f56b11d2 QL	518	\r
4a567c96	519	//\r
16d2c32c	520	// Check input parameters.\r
4a567c96	521	//\r
16d2c32c	522	if (Cert == NULL \|\| CACert == NULL) {\r
	523	return FALSE;\r
	524	}\r
4a567c96	525	\r
4a567c96	526	Status = FALSE;\r
4a567c96	527	X509Cert = NULL;\r
	528	X509CACert = NULL;\r
	529	CertStore = NULL;\r
f56b11d2	530	CertCtx = NULL;\r
4a567c96	531	\r
	532	//\r
	533	// Register & Initialize necessary digest algorithms for certificate verification.\r
	534	//\r
dda39f3a	535	if (EVP_add_digest (EVP_md5 ()) == 0) {\r
	536	goto _Exit;\r
	537	}\r
	538	if (EVP_add_digest (EVP_sha1 ()) == 0) {\r
	539	goto _Exit;\r
	540	}\r
	541	if (EVP_add_digest (EVP_sha256 ()) == 0) {\r
	542	goto _Exit;\r
	543	}\r
4a567c96	544	\r
	545	//\r
	546	// Read DER-encoded certificate to be verified and Construct X509 object.\r
	547	//\r
b7d320f8	548	Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert);\r
b7d320f8	549	if ((X509Cert == NULL) \|\| (!Status)) {\r
dda39f3a	550	Status = FALSE;\r
4a567c96	551	goto _Exit;\r
	552	}\r
	553	\r
	554	//\r
	555	// Read DER-encoded root certificate and Construct X509 object.\r
	556	//\r
b7d320f8	557	Status = X509ConstructCertificate (CACert, CACertSize, (UINT8 **) &X509CACert);\r
b7d320f8	558	if ((X509CACert == NULL) \|\| (!Status)) {\r
dda39f3a	559	Status = FALSE;\r
4a567c96	560	goto _Exit;\r
	561	}\r
	562	\r
dda39f3a	563	Status = FALSE;\r
dda39f3a	564	\r
4a567c96	565	//\r
	566	// Set up X509 Store for trusted certificate.\r
	567	//\r
	568	CertStore = X509_STORE_new ();\r
	569	if (CertStore == NULL) {\r
	570	goto _Exit;\r
	571	}\r
	572	if (!(X509_STORE_add_cert (CertStore, X509CACert))) {\r
	573	goto _Exit;\r
	574	}\r
	575	\r
68547181 DW	576	//\r
68547181 DW	577	// Allow partial certificate chains, terminated by a non-self-signed but\r
de0408be	578	// still trusted intermediate certificate. Also disable time checks.\r
68547181	579	//\r
de0408be DW	580	X509_STORE_set_flags (CertStore,\r
de0408be DW	581	X509_V_FLAG_PARTIAL_CHAIN \| X509_V_FLAG_NO_CHECK_TIME);\r
68547181	582	\r
4a567c96	583	//\r
	584	// Set up X509_STORE_CTX for the subsequent verification operation.\r
	585	//\r
f56b11d2 QL	586	CertCtx = X509_STORE_CTX_new ();\r
	587	if (CertCtx == NULL) {\r
	588	goto _Exit;\r
	589	}\r
	590	if (!X509_STORE_CTX_init (CertCtx, CertStore, X509Cert, NULL)) {\r
4a567c96	591	goto _Exit;\r
	592	}\r
	593	\r
	594	//\r
	595	// X509 Certificate Verification.\r
	596	//\r
f56b11d2 QL	597	Status = (BOOLEAN) X509_verify_cert (CertCtx);\r
f56b11d2 QL	598	X509_STORE_CTX_cleanup (CertCtx);\r
4a567c96	599	\r
	600	_Exit:\r
	601	//\r
	602	// Release Resources.\r
	603	//\r
dda39f3a	604	if (X509Cert != NULL) {\r
	605	X509_free (X509Cert);\r
	606	}\r
	607	\r
	608	if (X509CACert != NULL) {\r
	609	X509_free (X509CACert);\r
	610	}\r
4a567c96	611	\r
dda39f3a	612	if (CertStore != NULL) {\r
	613	X509_STORE_free (CertStore);\r
	614	}\r
f56b11d2 QL	615	\r
	616	X509_STORE_CTX_free (CertCtx);\r
	617	\r
4a567c96	618	return Status;\r
4a567c96	619	}\r
12d95665 LQ	620	\r
	621	/**\r
	622	Retrieve the TBSCertificate from one given X.509 certificate.\r
	623	\r
	624	@param[in] Cert Pointer to the given DER-encoded X509 certificate.\r
	625	@param[in] CertSize Size of the X509 certificate in bytes.\r
	626	@param[out] TBSCert DER-Encoded To-Be-Signed certificate.\r
	627	@param[out] TBSCertSize Size of the TBS certificate in bytes.\r
	628	\r
	629	If Cert is NULL, then return FALSE.\r
	630	If TBSCert is NULL, then return FALSE.\r
	631	If TBSCertSize is NULL, then return FALSE.\r
	632	\r
	633	@retval TRUE The TBSCertificate was retrieved successfully.\r
	634	@retval FALSE Invalid X.509 certificate.\r
	635	\r
	636	**/\r
	637	BOOLEAN\r
	638	EFIAPI\r
	639	X509GetTBSCert (\r
	640	IN CONST UINT8 *Cert,\r
	641	IN UINTN CertSize,\r
	642	OUT UINT8 **TBSCert,\r
	643	OUT UINTN *TBSCertSize\r
	644	)\r
	645	{\r
	646	CONST UINT8 *Temp;\r
2067d9f8 ZC	647	UINT32 Asn1Tag;\r
2067d9f8 ZC	648	UINT32 ObjClass;\r
12d95665 LQ	649	UINTN Length;\r
	650	\r
	651	//\r
	652	// Check input parameters.\r
	653	//\r
1463ce18 QL	654	if ((Cert == NULL) \|\| (TBSCert == NULL) \|\|\r
1463ce18 QL	655	(TBSCertSize == NULL) \|\| (CertSize > INT_MAX)) {\r
12d95665 LQ	656	return FALSE;\r
	657	}\r
	658	\r
	659	//\r
	660	// An X.509 Certificate is: (defined in RFC3280)\r
	661	// Certificate ::= SEQUENCE {\r
	662	// tbsCertificate TBSCertificate,\r
	663	// signatureAlgorithm AlgorithmIdentifier,\r
	664	// signature BIT STRING }\r
	665	//\r
	666	// and\r
	667	//\r
	668	// TBSCertificate ::= SEQUENCE {\r
	669	// version [0] Version DEFAULT v1,\r
	670	// ...\r
	671	// }\r
	672	//\r
	673	// So we can just ASN1-parse the x.509 DER-encoded data. If we strip\r
	674	// the first SEQUENCE, the second SEQUENCE is the TBSCertificate.\r
	675	//\r
2067d9f8 ZC	676	Temp = Cert;\r
2067d9f8 ZC	677	Length = 0;\r
12d95665 LQ	678	ASN1_get_object (&Temp, (long )&Length, (int )&Asn1Tag, (int *)&ObjClass, (long)CertSize);\r
	679	\r
	680	if (Asn1Tag != V_ASN1_SEQUENCE) {\r
	681	return FALSE;\r
	682	}\r
	683	\r
	684	TBSCert = (UINT8 )Temp;\r
	685	\r
	686	ASN1_get_object (&Temp, (long )&Length, (int )&Asn1Tag, (int *)&ObjClass, (long)Length);\r
	687	//\r
	688	// Verify the parsed TBSCertificate is one correct SEQUENCE data.\r
	689	//\r
	690	if (Asn1Tag != V_ASN1_SEQUENCE) {\r
	691	return FALSE;\r
	692	}\r
	693	\r
	694	TBSCertSize = Length + (Temp - TBSCert);\r
f56b11d2	695	\r
12d95665 LQ	696	return TRUE;\r
12d95665 LQ	697	}\r