NetworkPkg/IScsiDxe: assert that IScsiBinToHex() always succeeds
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>
Message-Id: <20210608121259.32451-7-lersek@redhat.com>
diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c
index 9e192ce..dbe3c8e 100644
--- a/NetworkPkg/IScsiDxe/IScsiCHAP.c
+++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c
@@ -391,6 +391,7 @@
UINT32 RspLen;
CHAR8 *Challenge;
UINT32 ChallengeLen;
+ EFI_STATUS BinToHexStatus;
ASSERT (Conn->CurrentStage == ISCSI_SECURITY_NEGOTIATION);
@@ -471,12 +472,13 @@
//
// 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 @@
// 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;