audk/NetworkPkg
Laszlo Ersek b8649cf2a3 NetworkPkg/IScsiDxe: check IScsiHexToBin() return values
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>
Message-Id: <20210608121259.32451-11-lersek@redhat.com>
2021-06-09 17:25:03 +00:00
..
Application/VConfig
ArpDxe
Dhcp4Dxe
Dhcp6Dxe
DnsDxe
DpcDxe
HttpBootDxe
HttpDxe
HttpUtilitiesDxe
IScsiDxe NetworkPkg/IScsiDxe: check IScsiHexToBin() return values 2021-06-09 17:25:03 +00:00
Include
Ip4Dxe
Ip6Dxe
Library
MnpDxe
Mtftp4Dxe
Mtftp6Dxe
SnpDxe
TcpDxe
TlsAuthConfigDxe
TlsDxe
Udp4Dxe
Udp6Dxe
UefiPxeBcDxe
VlanConfigDxe
WifiConnectionManagerDxe
Network.dsc.inc
Network.fdf.inc
NetworkBuildOptions.dsc.inc
NetworkComponents.dsc.inc
NetworkDefines.dsc.inc
NetworkLibs.dsc.inc
NetworkPcds.dsc.inc
NetworkPkg.ci.yaml
NetworkPkg.dec
NetworkPkg.dsc
NetworkPkg.uni
NetworkPkgExtra.uni