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ovmf.27278
ovmf-bsc1186151-fix-iscsi-overflows.patch
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File ovmf-bsc1186151-fix-iscsi-overflows.patch of Package ovmf.27278
From 4be085cdcbca669eba89916b7d1b738b613e59c5 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Mon, 26 Apr 2021 19:05:20 +0200 Subject: [PATCH 01/10] NetworkPkg/IScsiDxe: wrap IScsiCHAP source files to 80 characters MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Working with overlong lines is difficult for me; rewrap the CHAP-related source files in IScsiDxe to 80 characters width. No functional changes. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiCHAP.c | 90 +++++++++++++++++++++++++-------- NetworkPkg/IScsiDxe/IScsiCHAP.h | 3 +- 2 files changed, 71 insertions(+), 22 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c index 355c6f129f68..cbbc56ae5b43 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.c +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c @@ -1,5 +1,6 @@ /** @file - This file is for Challenge-Handshake Authentication Protocol (CHAP) Configuration. + This file is for Challenge-Handshake Authentication Protocol (CHAP) + Configuration. Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR> SPDX-License-Identifier: BSD-2-Clause-Patent @@ -18,9 +19,11 @@ SPDX-License-Identifier: BSD-2-Clause-Patent @param[in] ChallengeLength The length of iSCSI CHAP challenge message. @param[out] ChapResponse The calculation of the expected hash value. - @retval EFI_SUCCESS The expected hash value was calculatedly successfully. - @retval EFI_PROTOCOL_ERROR The length of the secret should be at least the - length of the hash value for the hashing algorithm chosen. + @retval EFI_SUCCESS The expected hash value was calculatedly + successfully. + @retval EFI_PROTOCOL_ERROR The length of the secret should be at least + the length of the hash value for the hashing + algorithm chosen. @retval EFI_PROTOCOL_ERROR MD5 hash operation fail. @retval EFI_OUT_OF_RESOURCES Fail to allocate resource to complete MD5. @@ -94,8 +97,10 @@ Exit: @param[in] AuthData iSCSI CHAP authentication data. @param[in] TargetResponse The response from target. - @retval EFI_SUCCESS The response from target passed authentication. - @retval EFI_SECURITY_VIOLATION The response from target was not expected value. + @retval EFI_SUCCESS The response from target passed + authentication. + @retval EFI_SECURITY_VIOLATION The response from target was not expected + value. @retval Others Other errors as indicated. **/ @@ -193,7 +198,10 @@ IScsiCHAPOnRspReceived ( // // The first Login Response. // - Value = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_TARGET_PORTAL_GROUP_TAG); + Value = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_TARGET_PORTAL_GROUP_TAG + ); if (Value == NULL) { goto ON_EXIT; } @@ -205,13 +213,17 @@ IScsiCHAPOnRspReceived ( Session->TargetPortalGroupTag = (UINT16) Result; - Value = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_AUTH_METHOD); + Value = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_AUTH_METHOD + ); if (Value == NULL) { goto ON_EXIT; } // - // Initiator mandates CHAP authentication but target replies without "CHAP", or - // initiator suggets "None" but target replies with some kind of auth method. + // Initiator mandates CHAP authentication but target replies without + // "CHAP", or initiator suggets "None" but target replies with some kind of + // auth method. // if (Session->AuthType == ISCSI_AUTH_TYPE_NONE) { if (AsciiStrCmp (Value, ISCSI_KEY_VALUE_NONE) != 0) { @@ -236,7 +248,10 @@ IScsiCHAPOnRspReceived ( // // The Target replies with CHAP_A=<A> CHAP_I=<I> CHAP_C=<C> // - Value = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_CHAP_ALGORITHM); + Value = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_CHAP_ALGORITHM + ); if (Value == NULL) { goto ON_EXIT; } @@ -249,12 +264,18 @@ IScsiCHAPOnRspReceived ( goto ON_EXIT; } - Identifier = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_CHAP_IDENTIFIER); + Identifier = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_CHAP_IDENTIFIER + ); if (Identifier == NULL) { goto ON_EXIT; } - Challenge = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_CHAP_CHALLENGE); + Challenge = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_CHAP_CHALLENGE + ); if (Challenge == NULL) { goto ON_EXIT; } @@ -269,7 +290,11 @@ IScsiCHAPOnRspReceived ( AuthData->InIdentifier = (UINT32) Result; AuthData->InChallengeLength = ISCSI_CHAP_AUTH_MAX_LEN; - IScsiHexToBin ((UINT8 *) AuthData->InChallenge, &AuthData->InChallengeLength, Challenge); + IScsiHexToBin ( + (UINT8 *) AuthData->InChallenge, + &AuthData->InChallengeLength, + Challenge + ); Status = IScsiCHAPCalculateResponse ( AuthData->InIdentifier, AuthData->AuthConfig->CHAPSecret, @@ -303,7 +328,10 @@ IScsiCHAPOnRspReceived ( goto ON_EXIT; } - Response = IScsiGetValueByKeyFromList (KeyValueList, ISCSI_KEY_CHAP_RESPONSE); + Response = IScsiGetValueByKeyFromList ( + KeyValueList, + ISCSI_KEY_CHAP_RESPONSE + ); if (Response == NULL) { goto ON_EXIT; } @@ -341,7 +369,8 @@ ON_EXIT: @param[in, out] Pdu The PDU to send out. @retval EFI_SUCCESS All check passed and the phase-related CHAP - authentication info is filled into the iSCSI PDU. + authentication info is filled into the iSCSI + PDU. @retval EFI_OUT_OF_RESOURCES Failed to allocate memory. @retval EFI_PROTOCOL_ERROR Some kind of protocol error occurred. @@ -392,7 +421,11 @@ IScsiCHAPToSendReq ( // It's the initial Login Request. Fill in the key=value pairs mandatory // for the initial Login Request. // - IScsiAddKeyValuePair (Pdu, ISCSI_KEY_INITIATOR_NAME, mPrivate->InitiatorName); + IScsiAddKeyValuePair ( + Pdu, + ISCSI_KEY_INITIATOR_NAME, + mPrivate->InitiatorName + ); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_SESSION_TYPE, "Normal"); IScsiAddKeyValuePair ( Pdu, @@ -413,7 +446,8 @@ IScsiCHAPToSendReq ( case ISCSI_CHAP_STEP_ONE: // - // First step, send the Login Request with CHAP_A=<A1,A2...> key-value pair. + // First step, send the Login Request with CHAP_A=<A1,A2...> key-value + // pair. // AsciiSPrint (ValueStr, sizeof (ValueStr), "%d", ISCSI_CHAP_ALGORITHM_MD5); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_ALGORITHM, ValueStr); @@ -429,11 +463,20 @@ IScsiCHAPToSendReq ( // // CHAP_N=<N> // - IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_NAME, (CHAR8 *) &AuthData->AuthConfig->CHAPName); + IScsiAddKeyValuePair ( + Pdu, + ISCSI_KEY_CHAP_NAME, + (CHAR8 *) &AuthData->AuthConfig->CHAPName + ); // // CHAP_R=<R> // - IScsiBinToHex ((UINT8 *) AuthData->CHAPResponse, ISCSI_CHAP_RSP_LEN, Response, &RspLen); + IScsiBinToHex ( + (UINT8 *) AuthData->CHAPResponse, + ISCSI_CHAP_RSP_LEN, + Response, + &RspLen + ); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_RESPONSE, Response); if (AuthData->AuthConfig->CHAPType == ISCSI_CHAP_MUTUAL) { @@ -448,7 +491,12 @@ IScsiCHAPToSendReq ( // IScsiGenRandom ((UINT8 *) AuthData->OutChallenge, ISCSI_CHAP_RSP_LEN); AuthData->OutChallengeLength = ISCSI_CHAP_RSP_LEN; - IScsiBinToHex ((UINT8 *) AuthData->OutChallenge, ISCSI_CHAP_RSP_LEN, Challenge, &ChallengeLen); + IScsiBinToHex ( + (UINT8 *) AuthData->OutChallenge, + ISCSI_CHAP_RSP_LEN, + Challenge, + &ChallengeLen + ); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_CHALLENGE, Challenge); Conn->AuthStep = ISCSI_CHAP_STEP_FOUR; diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.h b/NetworkPkg/IScsiDxe/IScsiCHAP.h index 140bba0dcd76..5e59fb678bd7 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.h +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.h @@ -88,7 +88,8 @@ IScsiCHAPOnRspReceived ( @param[in, out] Pdu The PDU to send out. @retval EFI_SUCCESS All check passed and the phase-related CHAP - authentication info is filled into the iSCSI PDU. + authentication info is filled into the iSCSI + PDU. @retval EFI_OUT_OF_RESOURCES Failed to allocate memory. @retval EFI_PROTOCOL_ERROR Some kind of protocol error occurred. -- 2.31.1 From a8ed8eb33ed85e948845b0c4ad97f80518eb841d Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Mon, 26 Apr 2021 20:07:25 +0200 Subject: [PATCH 02/10] NetworkPkg/IScsiDxe: simplify "ISCSI_CHAP_AUTH_DATA.InChallenge" size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The ISCSI_CHAP_AUTH_MAX_LEN macro is defined with value 1024. The usage of this macro currently involves a semantic (not functional) bug, which we're going to fix in a subsequent patch, eliminating ISCSI_CHAP_AUTH_MAX_LEN altogether. For now, remove the macro's usage from all "ISCSI_CHAP_AUTH_DATA.InChallenge" contexts. This is doable without duplicating open-coded constants. No changes in functionality. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiCHAP.c | 2 +- NetworkPkg/IScsiDxe/IScsiCHAP.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c index cbbc56ae5b43..df3c2eb1200a 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.c +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c @@ -289,7 +289,7 @@ IScsiCHAPOnRspReceived ( } AuthData->InIdentifier = (UINT32) Result; - AuthData->InChallengeLength = ISCSI_CHAP_AUTH_MAX_LEN; + AuthData->InChallengeLength = (UINT32) sizeof (AuthData->InChallenge); IScsiHexToBin ( (UINT8 *) AuthData->InChallenge, &AuthData->InChallengeLength, diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.h b/NetworkPkg/IScsiDxe/IScsiCHAP.h index 5e59fb678bd7..1fc1d96ea3f3 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.h +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.h @@ -49,7 +49,7 @@ typedef struct _ISCSI_CHAP_AUTH_CONFIG_NVDATA { typedef struct _ISCSI_CHAP_AUTH_DATA { ISCSI_CHAP_AUTH_CONFIG_NVDATA *AuthConfig; UINT32 InIdentifier; - UINT8 InChallenge[ISCSI_CHAP_AUTH_MAX_LEN]; + UINT8 InChallenge[1024]; UINT32 InChallengeLength; // // Calculated CHAP Response (CHAP_R) value. -- 2.31.1 From 6e1ea5cfd7b4f4cfc4d3920a93351363a7a51361 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Mon, 26 Apr 2021 20:17:23 +0200 Subject: [PATCH 03/10] NetworkPkg/IScsiDxe: clean up "ISCSI_CHAP_AUTH_DATA.OutChallengeLength" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The "ISCSI_CHAP_AUTH_DATA.OutChallenge" field is declared as a UINT8 array with ISCSI_CHAP_AUTH_MAX_LEN (1024) elements. However, when the challenge is generated and formatted, only ISCSI_CHAP_RSP_LEN (16) octets are used in the array. Change the array size to ISCSI_CHAP_RSP_LEN, and remove the (now unused) ISCSI_CHAP_AUTH_MAX_LEN macro. Remove the "ISCSI_CHAP_AUTH_DATA.OutChallengeLength" field, which is superfluous too. Most importantly, explain in a new comment *why* tying the challenge size to the digest size (ISCSI_CHAP_RSP_LEN) has always made sense. (See also Linux kernel commit 19f5f88ed779, "scsi: target: iscsi: tie the challenge length to the hash digest size", 2019-11-06.) For sure, the motivation that the new comment now explains has always been there, and has always been the same, for IScsiDxe; it's just that now we spell it out too. No change in peer-visible behavior. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiCHAP.c | 3 +-- NetworkPkg/IScsiDxe/IScsiCHAP.h | 9 ++++++--- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c index df3c2eb1200a..9e192ce292e8 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.c +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c @@ -122,7 +122,7 @@ IScsiCHAPAuthTarget ( AuthData->AuthConfig->ReverseCHAPSecret, SecretSize, AuthData->OutChallenge, - AuthData->OutChallengeLength, + ISCSI_CHAP_RSP_LEN, // ChallengeLength VerifyRsp ); @@ -490,7 +490,6 @@ IScsiCHAPToSendReq ( // CHAP_C=<C> // IScsiGenRandom ((UINT8 *) AuthData->OutChallenge, ISCSI_CHAP_RSP_LEN); - AuthData->OutChallengeLength = ISCSI_CHAP_RSP_LEN; IScsiBinToHex ( (UINT8 *) AuthData->OutChallenge, ISCSI_CHAP_RSP_LEN, diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.h b/NetworkPkg/IScsiDxe/IScsiCHAP.h index 1fc1d96ea3f3..35d5d6ec29e3 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.h +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.h @@ -19,7 +19,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #define ISCSI_CHAP_ALGORITHM_MD5 5 -#define ISCSI_CHAP_AUTH_MAX_LEN 1024 /// /// MD5_HASHSIZE /// @@ -59,9 +58,13 @@ typedef struct _ISCSI_CHAP_AUTH_DATA { // // Auth-data to be sent out for mutual authentication. // + // While the challenge size is technically independent of the hashing + // algorithm, it is good practice to avoid hashing *fewer bytes* than the + // digest size. In other words, it's good practice to feed *at least as many + // bytes* to the hashing algorithm as the hashing algorithm will output. + // UINT32 OutIdentifier; - UINT8 OutChallenge[ISCSI_CHAP_AUTH_MAX_LEN]; - UINT32 OutChallengeLength; + UINT8 OutChallenge[ISCSI_CHAP_RSP_LEN]; } ISCSI_CHAP_AUTH_DATA; /** -- 2.31.1 From f3b4da06219178c6414d704b9588ec3bc05710bd Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 09:49:16 +0200 Subject: [PATCH 04/10] NetworkPkg/IScsiDxe: clean up library class dependencies MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sort the library class dependencies in the #include directives and in the INF file. Remove the DpcLib class from the #include directives -- it is not listed in the INF file, and IScsiDxe doesn't call either DpcLib API (QueueDpc(), DispatchDpc()). No functional changes. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiDxe.inf | 6 +++--- NetworkPkg/IScsiDxe/IScsiImpl.h | 17 ++++++++--------- 2 files changed, 11 insertions(+), 12 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiDxe.inf b/NetworkPkg/IScsiDxe/IScsiDxe.inf index 0ffb340ce05e..543c4083026a 100644 --- a/NetworkPkg/IScsiDxe/IScsiDxe.inf +++ b/NetworkPkg/IScsiDxe/IScsiDxe.inf @@ -65,6 +65,7 @@ [Packages] NetworkPkg/NetworkPkg.dec [LibraryClasses] + BaseCryptLib BaseLib BaseMemoryLib DebugLib @@ -72,14 +73,13 @@ [LibraryClasses] HiiLib MemoryAllocationLib NetLib - TcpIoLib PrintLib + TcpIoLib UefiBootServicesTableLib UefiDriverEntryPoint + UefiHiiServicesLib UefiLib UefiRuntimeServicesTableLib - UefiHiiServicesLib - BaseCryptLib [Protocols] gEfiAcpiTableProtocolGuid ## SOMETIMES_CONSUMES ## SystemTable diff --git a/NetworkPkg/IScsiDxe/IScsiImpl.h b/NetworkPkg/IScsiDxe/IScsiImpl.h index 387ab9765e9e..d895c7feb947 100644 --- a/NetworkPkg/IScsiDxe/IScsiImpl.h +++ b/NetworkPkg/IScsiDxe/IScsiImpl.h @@ -35,21 +35,20 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Protocol/AdapterInformation.h> #include <Protocol/NetworkInterfaceIdentifier.h> -#include <Library/HiiLib.h> -#include <Library/UefiHiiServicesLib.h> -#include <Library/DevicePathLib.h> -#include <Library/DebugLib.h> +#include <Library/BaseCryptLib.h> #include <Library/BaseLib.h> #include <Library/BaseMemoryLib.h> +#include <Library/DebugLib.h> +#include <Library/DevicePathLib.h> +#include <Library/HiiLib.h> #include <Library/MemoryAllocationLib.h> +#include <Library/NetLib.h> #include <Library/PrintLib.h> +#include <Library/TcpIoLib.h> #include <Library/UefiBootServicesTableLib.h> -#include <Library/UefiRuntimeServicesTableLib.h> +#include <Library/UefiHiiServicesLib.h> #include <Library/UefiLib.h> -#include <Library/DpcLib.h> -#include <Library/NetLib.h> -#include <Library/TcpIoLib.h> -#include <Library/BaseCryptLib.h> +#include <Library/UefiRuntimeServicesTableLib.h> #include <Guid/MdeModuleHii.h> #include <Guid/EventGroup.h> -- 2.31.1 From 280a895ae31afc91577e2e2ca3e146a48a2b8e68 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 10:10:42 +0200 Subject: [PATCH 05/10] NetworkPkg/IScsiDxe: fix potential integer overflow in IScsiBinToHex() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Considering IScsiBinToHex(): > if (((*HexLength) - 3) < BinLength * 2) { > *HexLength = BinLength * 2 + 3; > } the following subexpressions are problematic: (*HexLength) - 3 BinLength * 2 BinLength * 2 + 3 The first one may wrap under zero, the latter two may wrap over MAX_UINT32. Rewrite the calculation using SafeIntLib. While at it, change the type of the "Index" variable from UINTN to UINT32. The largest "Index"-based value that we calculate is Index * 2 + 2 (with (Index == BinLength)) Because the patch makes BinLength * 2 + 3 safe to calculate in UINT32, using UINT32 for Index * 2 + 2 (with (Index == BinLength)) is safe too. Consistently using UINT32 improves readability. This patch is best reviewed with "git show -W". The integer overflows that this patch fixes are theoretical; a subsequent patch in the series will audit the IScsiBinToHex() call sites, and show that none of them can fail. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiDxe.inf | 1 + NetworkPkg/IScsiDxe/IScsiImpl.h | 1 + NetworkPkg/IScsiDxe/IScsiMisc.c | 19 +++++++++++++++---- NetworkPkg/IScsiDxe/IScsiMisc.h | 1 + 4 files changed, 18 insertions(+), 4 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiDxe.inf b/NetworkPkg/IScsiDxe/IScsiDxe.inf index 543c4083026a..1dde56d00ca2 100644 --- a/NetworkPkg/IScsiDxe/IScsiDxe.inf +++ b/NetworkPkg/IScsiDxe/IScsiDxe.inf @@ -74,6 +74,7 @@ [LibraryClasses] MemoryAllocationLib NetLib PrintLib + SafeIntLib TcpIoLib UefiBootServicesTableLib UefiDriverEntryPoint diff --git a/NetworkPkg/IScsiDxe/IScsiImpl.h b/NetworkPkg/IScsiDxe/IScsiImpl.h index d895c7feb947..ac3a25730efb 100644 --- a/NetworkPkg/IScsiDxe/IScsiImpl.h +++ b/NetworkPkg/IScsiDxe/IScsiImpl.h @@ -44,6 +44,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Library/MemoryAllocationLib.h> #include <Library/NetLib.h> #include <Library/PrintLib.h> +#include <Library/SafeIntLib.h> #include <Library/TcpIoLib.h> #include <Library/UefiBootServicesTableLib.h> #include <Library/UefiHiiServicesLib.h> diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c index b8fef3ff6f5a..42988e15cb06 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.c +++ b/NetworkPkg/IScsiDxe/IScsiMisc.c @@ -316,6 +316,7 @@ IScsiMacAddrToStr ( @retval EFI_SUCCESS The binary data is converted to the hexadecimal string and the length of the string is updated. @retval EFI_BUFFER_TOO_SMALL The string is too small. + @retval EFI_BAD_BUFFER_SIZE BinLength is too large for hex encoding. @retval EFI_INVALID_PARAMETER The IP string is malformatted. **/ @@ -327,18 +328,28 @@ IScsiBinToHex ( IN OUT UINT32 *HexLength ) { - UINTN Index; + UINT32 HexLengthMin; + UINT32 HexLengthProvided; + UINT32 Index; if ((HexStr == NULL) || (BinBuffer == NULL) || (BinLength == 0)) { return EFI_INVALID_PARAMETER; } - if (((*HexLength) - 3) < BinLength * 2) { - *HexLength = BinLength * 2 + 3; + // + // Safely calculate: HexLengthMin := BinLength * 2 + 3. + // + if (RETURN_ERROR (SafeUint32Mult (BinLength, 2, &HexLengthMin)) || + RETURN_ERROR (SafeUint32Add (HexLengthMin, 3, &HexLengthMin))) { + return EFI_BAD_BUFFER_SIZE; + } + + HexLengthProvided = *HexLength; + *HexLength = HexLengthMin; + if (HexLengthProvided < HexLengthMin) { return EFI_BUFFER_TOO_SMALL; } - *HexLength = BinLength * 2 + 3; // // Prefix for Hex String. // diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.h b/NetworkPkg/IScsiDxe/IScsiMisc.h index 46c725aab3a4..231413993b08 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.h +++ b/NetworkPkg/IScsiDxe/IScsiMisc.h @@ -150,6 +150,7 @@ IScsiAsciiStrToIp ( @retval EFI_SUCCESS The binary data is converted to the hexadecimal string and the length of the string is updated. @retval EFI_BUFFER_TOO_SMALL The string is too small. + @retval EFI_BAD_BUFFER_SIZE BinLength is too large for hex encoding. @retval EFI_INVALID_PARAMETER The IP string is malformatted. **/ -- 2.31.1 From d6d9ae7b970fd980c004bff201eb1ce5ae72bde0 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 10:26:01 +0200 Subject: [PATCH 06/10] NetworkPkg/IScsiDxe: assert that IScsiBinToHex() always succeeds MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit IScsiBinToHex() is called for encoding: - the answer to the target's challenge; that is, CHAP_R; - the challenge for the target, in case mutual authentication is enabled; that is, CHAP_C. The initiator controls the size of both blobs, the sizes of their hex encodings are correctly calculated in "RspLen" and "ChallengeLen". Therefore the IScsiBinToHex() calls never fail; assert that. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiCHAP.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c index 9e192ce292e8..dbe3c8ef46f9 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.c +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c @@ -391,6 +391,7 @@ IScsiCHAPToSendReq ( UINT32 RspLen; CHAR8 *Challenge; UINT32 ChallengeLen; + EFI_STATUS BinToHexStatus; ASSERT (Conn->CurrentStage == ISCSI_SECURITY_NEGOTIATION); @@ -471,12 +472,13 @@ IScsiCHAPToSendReq ( // // CHAP_R=<R> // - IScsiBinToHex ( - (UINT8 *) AuthData->CHAPResponse, - ISCSI_CHAP_RSP_LEN, - Response, - &RspLen - ); + BinToHexStatus = IScsiBinToHex ( + (UINT8 *) AuthData->CHAPResponse, + ISCSI_CHAP_RSP_LEN, + Response, + &RspLen + ); + ASSERT_EFI_ERROR (BinToHexStatus); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_RESPONSE, Response); if (AuthData->AuthConfig->CHAPType == ISCSI_CHAP_MUTUAL) { @@ -490,12 +492,13 @@ IScsiCHAPToSendReq ( // CHAP_C=<C> // IScsiGenRandom ((UINT8 *) AuthData->OutChallenge, ISCSI_CHAP_RSP_LEN); - IScsiBinToHex ( - (UINT8 *) AuthData->OutChallenge, - ISCSI_CHAP_RSP_LEN, - Challenge, - &ChallengeLen - ); + BinToHexStatus = IScsiBinToHex ( + (UINT8 *) AuthData->OutChallenge, + ISCSI_CHAP_RSP_LEN, + Challenge, + &ChallengeLen + ); + ASSERT_EFI_ERROR (BinToHexStatus); IScsiAddKeyValuePair (Pdu, ISCSI_KEY_CHAP_CHALLENGE, Challenge); Conn->AuthStep = ISCSI_CHAP_STEP_FOUR; -- 2.31.1 From 5cb7be8c892d3579401f030fd0643c61fad95141 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 10:37:26 +0200 Subject: [PATCH 07/10] NetworkPkg/IScsiDxe: reformat IScsiHexToBin() leading comment block MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We'll need further return values for IScsiHexToBin() in a subsequent patch; make room for them in the leading comment block of the function. While at it, rewrap the comment block to 80 characters width. No functional changes. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiMisc.c | 14 +++++++------- NetworkPkg/IScsiDxe/IScsiMisc.h | 14 +++++++------- 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c index 42988e15cb06..014700e87a5f 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.c +++ b/NetworkPkg/IScsiDxe/IScsiMisc.c @@ -370,14 +370,14 @@ IScsiBinToHex ( /** Convert the hexadecimal string into a binary encoded buffer. - @param[in, out] BinBuffer The binary buffer. - @param[in, out] BinLength Length of the binary buffer. - @param[in] HexStr The hexadecimal string. - - @retval EFI_SUCCESS The hexadecimal string is converted into a binary - encoded buffer. - @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. + @param[in, out] BinBuffer The binary buffer. + @param[in, out] BinLength Length of the binary buffer. + @param[in] HexStr The hexadecimal string. + @retval EFI_SUCCESS The hexadecimal string is converted into a + binary encoded buffer. + @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the + converted data. **/ EFI_STATUS IScsiHexToBin ( diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.h b/NetworkPkg/IScsiDxe/IScsiMisc.h index 231413993b08..28cf408cd5c5 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.h +++ b/NetworkPkg/IScsiDxe/IScsiMisc.h @@ -165,14 +165,14 @@ IScsiBinToHex ( /** Convert the hexadecimal string into a binary encoded buffer. - @param[in, out] BinBuffer The binary buffer. - @param[in, out] BinLength Length of the binary buffer. - @param[in] HexStr The hexadecimal string. - - @retval EFI_SUCCESS The hexadecimal string is converted into a binary - encoded buffer. - @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. + @param[in, out] BinBuffer The binary buffer. + @param[in, out] BinLength Length of the binary buffer. + @param[in] HexStr The hexadecimal string. + @retval EFI_SUCCESS The hexadecimal string is converted into a + binary encoded buffer. + @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the + converted data. **/ EFI_STATUS IScsiHexToBin ( -- 2.31.1 From 9acfd2fa4d04943843ce48d2ce0555b3b8975aea Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 11:02:51 +0200 Subject: [PATCH 08/10] NetworkPkg/IScsiDxe: fix IScsiHexToBin() hex parsing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The IScsiHexToBin() function has the following parser issues: (1) If the *subject sequence* in "HexStr" is empty, the function returns EFI_SUCCESS (with "BinLength" set to 0 on output). Such inputs should be rejected. (2) The function mis-handles a "HexStr" that ends with a stray nibble. For example, if "HexStr" is "0xABC", the function decodes it to the bytes {0xAB, 0x0C}, sets "BinLength" to 2 on output, and returns EFI_SUCCESS. Such inputs should be rejected. (3) If an invalid hex char is found in "HexStr", the function treats it as end-of-hex-string, and returns EFI_SUCCESS. Such inputs should be rejected. All of the above cases are remotely triggerable, as shown in a subsequent patch, which adds error checking to the IScsiHexToBin() call sites. While the initiator is not immediately compromised, incorrectly parsing CHAP_R from the target, in case of mutual authentication, is not great. Extend the interface contract of IScsiHexToBin() with EFI_INVALID_PARAMETER, for reporting issues (1) through (3), and implement the new checks. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiMisc.c | 12 ++++++++++-- NetworkPkg/IScsiDxe/IScsiMisc.h | 1 + 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c index 014700e87a5f..f0f4992b07c7 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.c +++ b/NetworkPkg/IScsiDxe/IScsiMisc.c @@ -376,6 +376,7 @@ IScsiBinToHex ( @retval EFI_SUCCESS The hexadecimal string is converted into a binary encoded buffer. + @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. **/ @@ -402,14 +403,21 @@ IScsiHexToBin ( Length = AsciiStrLen (HexStr); + // + // Reject an empty hex string; reject a stray nibble. + // + if (Length == 0 || Length % 2 != 0) { + return EFI_INVALID_PARAMETER; + } + for (Index = 0; Index < Length; Index ++) { TemStr[0] = HexStr[Index]; Digit = (UINT8) AsciiStrHexToUint64 (TemStr); if (Digit == 0 && TemStr[0] != '0') { // - // Invalid Lun Char. + // Invalid Hex Char. // - break; + return EFI_INVALID_PARAMETER; } if ((Index & 1) == 0) { BinBuffer [Index/2] = Digit; diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.h b/NetworkPkg/IScsiDxe/IScsiMisc.h index 28cf408cd5c5..404a482e57f3 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.h +++ b/NetworkPkg/IScsiDxe/IScsiMisc.h @@ -171,6 +171,7 @@ IScsiBinToHex ( @retval EFI_SUCCESS The hexadecimal string is converted into a binary encoded buffer. + @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. **/ -- 2.31.1 From a22e1c0ea7359d9e48e23e07a15f3e4918aab4c6 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 11:02:51 +0200 Subject: [PATCH 09/10] NetworkPkg/IScsiDxe: fix IScsiHexToBin() buffer overflow MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The IScsiHexToBin() function documents the EFI_BUFFER_TOO_SMALL return condition, but never actually checks whether the decoded buffer fits into the caller-provided room (i.e., the input value of "BinLength"), and EFI_BUFFER_TOO_SMALL is never returned. The decoding of "HexStr" can overflow "BinBuffer". This is remotely exploitable, as shown in a subsequent patch, which adds error checking to the IScsiHexToBin() call sites. This issue allows the target to compromise the initiator. Introduce EFI_BAD_BUFFER_SIZE, in addition to the existent EFI_BUFFER_TOO_SMALL, for reporting a special case of the buffer overflow, plus actually catch the buffer overflow. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiMisc.c | 20 +++++++++++++++++--- NetworkPkg/IScsiDxe/IScsiMisc.h | 3 +++ 2 files changed, 20 insertions(+), 3 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c index f0f4992b07c7..406954786751 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.c +++ b/NetworkPkg/IScsiDxe/IScsiMisc.c @@ -377,6 +377,9 @@ IScsiBinToHex ( @retval EFI_SUCCESS The hexadecimal string is converted into a binary encoded buffer. @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. + @retval EFI_BAD_BUFFER_SIZE The length of HexStr is too large for decoding: + the decoded size cannot be expressed in + BinLength on output. @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. **/ @@ -387,6 +390,8 @@ IScsiHexToBin ( IN CHAR8 *HexStr ) { + UINTN BinLengthMin; + UINT32 BinLengthProvided; UINTN Index; UINTN Length; UINT8 Digit; @@ -409,6 +414,18 @@ IScsiHexToBin ( if (Length == 0 || Length % 2 != 0) { return EFI_INVALID_PARAMETER; } + // + // Check if the caller provides enough room for the decoded blob. + // + BinLengthMin = Length / 2; + if (BinLengthMin > MAX_UINT32) { + return EFI_BAD_BUFFER_SIZE; + } + BinLengthProvided = *BinLength; + *BinLength = (UINT32)BinLengthMin; + if (BinLengthProvided < BinLengthMin) { + return EFI_BUFFER_TOO_SMALL; + } for (Index = 0; Index < Length; Index ++) { TemStr[0] = HexStr[Index]; @@ -425,9 +442,6 @@ IScsiHexToBin ( BinBuffer [Index/2] = (UINT8) ((BinBuffer [Index/2] << 4) + Digit); } } - - *BinLength = (UINT32) ((Index + 1)/2); - return EFI_SUCCESS; } diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.h b/NetworkPkg/IScsiDxe/IScsiMisc.h index 404a482e57f3..fddef4f466dc 100644 --- a/NetworkPkg/IScsiDxe/IScsiMisc.h +++ b/NetworkPkg/IScsiDxe/IScsiMisc.h @@ -172,6 +172,9 @@ IScsiBinToHex ( @retval EFI_SUCCESS The hexadecimal string is converted into a binary encoded buffer. @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. + @retval EFI_BAD_BUFFER_SIZE The length of HexStr is too large for decoding: + the decoded size cannot be expressed in + BinLength on output. @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data. **/ -- 2.31.1 From f2257bbecb8ede099e55284ea1263677d87695d5 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek <lersek@redhat.com> Date: Tue, 27 Apr 2021 12:10:12 +0200 Subject: [PATCH 10/10] NetworkPkg/IScsiDxe: check IScsiHexToBin() return values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit IScsiDxe (that is, the initiator) receives two hex-encoded strings from the iSCSI target: - CHAP_C, where the target challenges the initiator, - CHAP_R, where the target answers the challenge from the initiator (in case the initiator wants mutual authentication). Accordingly, we have two IScsiHexToBin() call sites: - At the CHAP_C decoding site, check whether the decoding succeeds. The decoded buffer ("AuthData->InChallenge") can accommodate 1024 bytes, which is a permissible restriction on the target, per <https://tools.ietf.org/html/rfc7143#section-12.1.3>. Shorter challenges from the target are acceptable. - At the CHAP_R decoding site, enforce that the decoding both succeed, and provide exactly ISCSI_CHAP_RSP_LEN bytes. CHAP_R contains the digest calculated by the target, therefore it must be of fixed size. We may only call IScsiCHAPAuthTarget() if "TargetRsp" has been fully populated. Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> --- NetworkPkg/IScsiDxe/IScsiCHAP.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c index dbe3c8ef46f9..7e930c0d1eab 100644 --- a/NetworkPkg/IScsiDxe/IScsiCHAP.c +++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c @@ -290,11 +290,15 @@ IScsiCHAPOnRspReceived ( AuthData->InIdentifier = (UINT32) Result; AuthData->InChallengeLength = (UINT32) sizeof (AuthData->InChallenge); - IScsiHexToBin ( - (UINT8 *) AuthData->InChallenge, - &AuthData->InChallengeLength, - Challenge - ); + Status = IScsiHexToBin ( + (UINT8 *) AuthData->InChallenge, + &AuthData->InChallengeLength, + Challenge + ); + if (EFI_ERROR (Status)) { + Status = EFI_PROTOCOL_ERROR; + goto ON_EXIT; + } Status = IScsiCHAPCalculateResponse ( AuthData->InIdentifier, AuthData->AuthConfig->CHAPSecret, @@ -337,7 +341,11 @@ IScsiCHAPOnRspReceived ( } RspLen = ISCSI_CHAP_RSP_LEN; - IScsiHexToBin (TargetRsp, &RspLen, Response); + Status = IScsiHexToBin (TargetRsp, &RspLen, Response); + if (EFI_ERROR (Status) || RspLen != ISCSI_CHAP_RSP_LEN) { + Status = EFI_PROTOCOL_ERROR; + goto ON_EXIT; + } // // Check the CHAP Name and Response replied by Target. -- 2.31.1
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