From 5b7c22450591a9e20ff54b970c11087ccfff563d Mon Sep 17 00:00:00 2001 From: Qin Long Date: Sun, 24 Sep 2017 23:42:16 +0800 Subject: [PATCH] CryptoPkg: Add new API to retrieve commonName of X.509 certificate v3: Add extra CommonNameSize check since OpenSSL didn't check this input parameter. (One openssl issue was filed to address this risk: https://github.com/openssl/openssl/issues/4392) v2: Update function interface to return RETURN_STATUS to represent different error cases. Add one new API (X509GetCommonName()) to retrieve the subject commonName string from one X.509 certificate. Cc: Laszlo Ersek Cc: Ting Ye Cc: Chao Zhang Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Qin Long Reviewed-by: Ye Ting Acked-by: Laszlo Ersek --- CryptoPkg/Application/Cryptest/RsaVerify2.c | 32 +++-- CryptoPkg/Include/Library/BaseCryptLib.h | 35 ++++++ CryptoPkg/Library/BaseCryptLib/Pk/CryptX509.c | 109 ++++++++++++++++++ .../Library/BaseCryptLib/Pk/CryptX509Null.c | 32 +++++ .../Pk/CryptX509Null.c | 34 +++++- 5 files changed, 234 insertions(+), 8 deletions(-) diff --git a/CryptoPkg/Application/Cryptest/RsaVerify2.c b/CryptoPkg/Application/Cryptest/RsaVerify2.c index 98b5aad900..9db43d6eef 100644 --- a/CryptoPkg/Application/Cryptest/RsaVerify2.c +++ b/CryptoPkg/Application/Cryptest/RsaVerify2.c @@ -204,13 +204,17 @@ ValidateCryptRsa2 ( VOID ) { - BOOLEAN Status; - VOID *RsaPrivKey; - VOID *RsaPubKey; - UINT8 *Signature; - UINTN SigSize; - UINT8 *Subject; - UINTN SubjectSize; + BOOLEAN Status; + VOID *RsaPrivKey; + VOID *RsaPubKey; + UINT8 *Signature; + UINTN SigSize; + UINT8 *Subject; + UINTN SubjectSize; + RETURN_STATUS ReturnStatus; + CHAR8 CommonName[64]; + CHAR16 CommonNameUnicode[64]; + UINTN CommonNameSize; Print (L"\nUEFI-OpenSSL RSA Key Retrieving Testing: "); @@ -286,6 +290,20 @@ ValidateCryptRsa2 ( Print (L"[Pass]"); } + // + // Get CommonName from X509 Certificate Subject + // + CommonNameSize = 64; + ZeroMem (CommonName, CommonNameSize); + ReturnStatus = X509GetCommonName (TestCert, sizeof (TestCert), CommonName, &CommonNameSize); + if (RETURN_ERROR (ReturnStatus)) { + Print (L"\n - Retrieving Common Name - [Fail]"); + return EFI_ABORTED; + } else { + AsciiStrToUnicodeStrS (CommonName, CommonNameUnicode, CommonNameSize); + Print (L"\n - Retrieving Common Name = \"%s\" (Size = %d)", CommonNameUnicode, CommonNameSize); + } + // // X509 Certificate Verification. // diff --git a/CryptoPkg/Include/Library/BaseCryptLib.h b/CryptoPkg/Include/Library/BaseCryptLib.h index 9c5ffcd9cf..5f67ecb709 100644 --- a/CryptoPkg/Include/Library/BaseCryptLib.h +++ b/CryptoPkg/Include/Library/BaseCryptLib.h @@ -2171,6 +2171,41 @@ X509GetSubjectName ( IN OUT UINTN *SubjectSize ); +/** + Retrieve the common name (CN) string from one X.509 certificate. + + @param[in] Cert Pointer to the DER-encoded X509 certificate. + @param[in] CertSize Size of the X509 certificate in bytes. + @param[out] CommonName Buffer to contain the retrieved certificate common + name string. At most CommonNameSize bytes will be + written and the string will be null terminated. May be + NULL in order to determine the size buffer needed. + @param[in,out] CommonNameSize The size in bytes of the CommonName buffer on input, + and the size of buffer returned CommonName on output. + If CommonName is NULL then the amount of space needed + in buffer (including the final null) is returned. + + @retval RETURN_SUCCESS The certificate CommonName retrieved successfully. + @retval RETURN_INVALID_PARAMETER If Cert is NULL. + If CommonNameSize is NULL. + If CommonName is not NULL and *CommonNameSize is 0. + If Certificate is invalid. + @retval RETURN_NOT_FOUND If no CommonName entry exists. + @retval RETURN_BUFFER_TOO_SMALL If the CommonName is NULL. The required buffer size + (including the final null) is returned in the + CommonNameSize parameter. + @retval RETURN_UNSUPPORTED The operation is not supported. + +**/ +RETURN_STATUS +EFIAPI +X509GetCommonName ( + IN CONST UINT8 *Cert, + IN UINTN CertSize, + OUT CHAR8 *CommonName, OPTIONAL + IN OUT UINTN *CommonNameSize + ); + /** Verify one X509 certificate was issued by the trusted CA. diff --git a/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509.c b/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509.c index 7d275977c5..bf7c4ccd42 100644 --- a/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509.c +++ b/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509.c @@ -297,6 +297,115 @@ _Exit: return Status; } +/** + Retrieve the common name (CN) string from one X.509 certificate. + + @param[in] Cert Pointer to the DER-encoded X509 certificate. + @param[in] CertSize Size of the X509 certificate in bytes. + @param[out] CommonName Buffer to contain the retrieved certificate common + name string. At most CommonNameSize bytes will be + written and the string will be null terminated. May be + NULL in order to determine the size buffer needed. + @param[in,out] CommonNameSize The size in bytes of the CommonName buffer on input, + and the size of buffer returned CommonName on output. + If CommonName is NULL then the amount of space needed + in buffer (including the final null) is returned. + + @retval RETURN_SUCCESS The certificate CommonName retrieved successfully. + @retval RETURN_INVALID_PARAMETER If Cert is NULL. + If CommonNameSize is NULL. + If CommonName is not NULL and *CommonNameSize is 0. + If Certificate is invalid. + @retval RETURN_NOT_FOUND If no CommonName entry exists. + @retval RETURN_BUFFER_TOO_SMALL If the CommonName is NULL. The required buffer size + (including the final null) is returned in the + CommonNameSize parameter. + @retval RETURN_UNSUPPORTED The operation is not supported. + +**/ +RETURN_STATUS +EFIAPI +X509GetCommonName ( + IN CONST UINT8 *Cert, + IN UINTN CertSize, + OUT CHAR8 *CommonName, OPTIONAL + IN OUT UINTN *CommonNameSize + ) +{ + RETURN_STATUS ReturnStatus; + BOOLEAN Status; + X509 *X509Cert; + X509_NAME *X509Name; + INTN Length; + + ReturnStatus = RETURN_INVALID_PARAMETER; + + // + // Check input parameters. + // + if ((Cert == NULL) || (CertSize > INT_MAX) || (CommonNameSize == NULL)) { + return ReturnStatus; + } + if ((CommonName != NULL) && (*CommonNameSize == 0)) { + return ReturnStatus; + } + + X509Cert = NULL; + // + // Read DER-encoded X509 Certificate and Construct X509 object. + // + Status = X509ConstructCertificate (Cert, CertSize, (UINT8 **) &X509Cert); + if ((X509Cert == NULL) || (!Status)) { + // + // Invalid X.509 Certificate + // + goto _Exit; + } + + Status = FALSE; + + // + // Retrieve subject name from certificate object. + // + X509Name = X509_get_subject_name (X509Cert); + if (X509Name == NULL) { + // + // Fail to retrieve subject name content + // + goto _Exit; + } + + // + // Retrieve the CommonName information from X.509 Subject + // + Length = (INTN) X509_NAME_get_text_by_NID (X509Name, NID_commonName, CommonName, (int)(*CommonNameSize)); + if (Length < 0) { + // + // No CommonName entry exists in X509_NAME object + // + *CommonNameSize = 0; + ReturnStatus = RETURN_NOT_FOUND; + goto _Exit; + } + + *CommonNameSize = (UINTN)(Length + 1); + if (CommonName == NULL) { + ReturnStatus = RETURN_BUFFER_TOO_SMALL; + } else { + ReturnStatus = RETURN_SUCCESS; + } + +_Exit: + // + // Release Resources. + // + if (X509Cert != NULL) { + X509_free (X509Cert); + } + + return ReturnStatus; +} + /** Retrieve the RSA Public Key from one DER-encoded X509 certificate. diff --git a/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509Null.c b/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509Null.c index 51aa0633a8..d00f38daa8 100644 --- a/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509Null.c +++ b/CryptoPkg/Library/BaseCryptLib/Pk/CryptX509Null.c @@ -127,6 +127,38 @@ X509GetSubjectName ( return FALSE; } +/** + Retrieve the common name (CN) string from one X.509 certificate. + + Return RETURN_UNSUPPORTED to indicate this interface is not supported. + + @param[in] Cert Pointer to the DER-encoded X509 certificate. + @param[in] CertSize Size of the X509 certificate in bytes. + @param[out] CommonName Buffer to contain the retrieved certificate common + name string. At most CommonNameSize bytes will be + written and the string will be null terminated. May be + NULL in order to determine the size buffer needed. + @param[in,out] CommonNameSize The size in bytes of the CommonName buffer on input, + and the size of buffer returned CommonName on output. + If CommonName is NULL then the amount of space needed + in buffer (including the final null) is returned. + + @retval RETURN_UNSUPPORTED The operation is not supported. + +**/ +RETURN_STATUS +EFIAPI +X509GetCommonName ( + IN CONST UINT8 *Cert, + IN UINTN CertSize, + OUT CHAR8 *CommonName, OPTIONAL + IN OUT UINTN *CommonNameSize + ) +{ + ASSERT (FALSE); + return RETURN_UNSUPPORTED; +} + /** Retrieve the RSA Public Key from one DER-encoded X509 certificate. diff --git a/CryptoPkg/Library/BaseCryptLibRuntimeCryptProtocol/Pk/CryptX509Null.c b/CryptoPkg/Library/BaseCryptLibRuntimeCryptProtocol/Pk/CryptX509Null.c index f5d9aa1076..d00f38daa8 100644 --- a/CryptoPkg/Library/BaseCryptLibRuntimeCryptProtocol/Pk/CryptX509Null.c +++ b/CryptoPkg/Library/BaseCryptLibRuntimeCryptProtocol/Pk/CryptX509Null.c @@ -127,6 +127,38 @@ X509GetSubjectName ( return FALSE; } +/** + Retrieve the common name (CN) string from one X.509 certificate. + + Return RETURN_UNSUPPORTED to indicate this interface is not supported. + + @param[in] Cert Pointer to the DER-encoded X509 certificate. + @param[in] CertSize Size of the X509 certificate in bytes. + @param[out] CommonName Buffer to contain the retrieved certificate common + name string. At most CommonNameSize bytes will be + written and the string will be null terminated. May be + NULL in order to determine the size buffer needed. + @param[in,out] CommonNameSize The size in bytes of the CommonName buffer on input, + and the size of buffer returned CommonName on output. + If CommonName is NULL then the amount of space needed + in buffer (including the final null) is returned. + + @retval RETURN_UNSUPPORTED The operation is not supported. + +**/ +RETURN_STATUS +EFIAPI +X509GetCommonName ( + IN CONST UINT8 *Cert, + IN UINTN CertSize, + OUT CHAR8 *CommonName, OPTIONAL + IN OUT UINTN *CommonNameSize + ) +{ + ASSERT (FALSE); + return RETURN_UNSUPPORTED; +} + /** Retrieve the RSA Public Key from one DER-encoded X509 certificate. @@ -203,4 +235,4 @@ X509GetTBSCert ( { ASSERT (FALSE); return FALSE; -} \ No newline at end of file +} -- 2.39.2