/** @file\r
X.509 Certificate Handler Wrapper Implementation over OpenSSL.\r
\r
-Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\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
\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
@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 ASSERT().\r
- If SubjectSize is NULL, then ASSERT().\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
)\r
{\r
BOOLEAN Status;\r
- BIO *CertBio;\r
X509 *X509Cert;\r
X509_NAME *X509Name;\r
+ UINTN X509NameSize;\r
\r
//\r
- // ASSERT if Cert is NULL or SubjectSize is NULL.\r
+ // Check input parameters.\r
//\r
- ASSERT (Cert != NULL);\r
- ASSERT (SubjectSize != NULL);\r
+ if (Cert == NULL || SubjectSize == NULL) {\r
+ return FALSE;\r
+ }\r
\r
- Status = FALSE;\r
X509Cert = NULL;\r
\r
//\r
// Read DER-encoded X509 Certificate and Construct X509 object.\r
//\r
- CertBio = BIO_new (BIO_s_mem ());\r
- BIO_write (CertBio, Cert, (int)CertSize);\r
- if (CertBio == NULL) {\r
- goto _Exit;\r
- }\r
- X509Cert = d2i_X509_bio (CertBio, NULL);\r
- if (Cert == NULL) {\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 (*SubjectSize < (UINTN) X509Name->bytes->length) {\r
- *SubjectSize = (UINTN) X509Name->bytes->length;\r
+ if (X509Name == NULL) {\r
goto _Exit;\r
}\r
- *SubjectSize = (UINTN) X509Name->bytes->length;\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
- CopyMem (CertSubject, (UINT8 *)X509Name->bytes->data, *SubjectSize);\r
+ i2d_X509_NAME(X509Name, &CertSubject);\r
Status = TRUE;\r
}\r
\r
//\r
// Release Resources.\r
//\r
- BIO_free (CertBio);\r
- X509_free (X509Cert);\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
RSA public key component. Use RsaFree() function to free the\r
resource.\r
\r
- If Cert is NULL, then ASSERT().\r
- If RsaContext is NULL, then ASSERT().\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
BOOLEAN Status;\r
EVP_PKEY *Pkey;\r
- BIO *CertBio;\r
X509 *X509Cert;\r
\r
//\r
- // ASSERT if Cert is NULL or RsaContext is NULL.\r
+ // Check input parameters.\r
//\r
- ASSERT (Cert != NULL);\r
- ASSERT (RsaContext != NULL);\r
+ if (Cert == NULL || RsaContext == NULL) {\r
+ return FALSE;\r
+ }\r
\r
- Status = FALSE;\r
Pkey = NULL;\r
- CertBio = NULL;\r
X509Cert = NULL;\r
\r
//\r
// Read DER-encoded X509 Certificate and Construct X509 object.\r
//\r
- CertBio = BIO_new (BIO_s_mem ());\r
- BIO_write (CertBio, Cert, (int)CertSize);\r
- if (CertBio == NULL) {\r
- goto _Exit;\r
- }\r
- X509Cert = d2i_X509_bio (CertBio, NULL);\r
- if (X509Cert == NULL) {\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) || (Pkey->type != EVP_PKEY_RSA)) {\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 (Pkey->pkey.rsa)) != NULL) {\r
+ if ((*RsaContext = RSAPublicKey_dup (EVP_PKEY_get0_RSA (Pkey))) != NULL) {\r
Status = TRUE;\r
}\r
\r
//\r
// Release Resources.\r
//\r
- BIO_free (CertBio);\r
- X509_free (X509Cert);\r
- EVP_PKEY_free (Pkey);\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
@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 ASSERT().\r
- If CACert is NULL, then ASSERT().\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
)\r
{\r
BOOLEAN Status;\r
- BIO *BioCert;\r
- BIO *BioCACert;\r
X509 *X509Cert;\r
X509 *X509CACert;\r
X509_STORE *CertStore;\r
- X509_STORE_CTX CertCtx;\r
+ X509_STORE_CTX *CertCtx;\r
\r
//\r
- // ASSERT if Cert is NULL or CACert is NULL.\r
+ // Check input parameters.\r
//\r
- ASSERT (Cert != NULL);\r
- ASSERT (CACert != NULL);\r
+ if (Cert == NULL || CACert == NULL) {\r
+ return FALSE;\r
+ }\r
\r
Status = FALSE;\r
- BioCert = NULL;\r
- BioCACert = NULL;\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
- EVP_add_digest (EVP_md5());\r
- EVP_add_digest (EVP_sha1());\r
- EVP_add_digest (EVP_sha256());\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
- BioCert = BIO_new (BIO_s_mem ());\r
- BIO_write (BioCert, Cert, (int)CertSize);\r
- if (BioCert == NULL) {\r
- goto _Exit;\r
- }\r
- X509Cert = d2i_X509_bio (BioCert, NULL);\r
- if (X509Cert == NULL) {\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
- BioCACert = BIO_new (BIO_s_mem());\r
- BIO_write (BioCACert, CACert, (int)CACertSize);\r
- if (BioCert == NULL) {\r
- goto _Exit;\r
- }\r
- X509CACert = d2i_X509_bio (BioCACert, NULL);\r
- if (CACert == NULL) {\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
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
- if (!X509_STORE_CTX_init (&CertCtx, CertStore, X509Cert, NULL)) {\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
+ Status = (BOOLEAN) X509_verify_cert (CertCtx);\r
+ X509_STORE_CTX_cleanup (CertCtx);\r
\r
_Exit:\r
//\r
// Release Resources.\r
//\r
- BIO_free (BioCert);\r
- BIO_free (BioCACert);\r
- X509_free (X509Cert);\r
- X509_free (X509CACert);\r
- X509_STORE_free (CertStore);\r
- X509_STORE_CTX_cleanup (&CertCtx);\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
+ INTN Asn1Tag;\r
+ INTN 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
+ 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
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