[MacPorts] #68483: hashcat @6.2.5_0: "No devices found/left" message on Apple M1 Max chip

[MacPorts]

#68483: hashcat @6.2.5_0: "No devices found/left" message on Apple M1 Max chip
--------------------+---------------------------
 Reporter:  JDLH    |      Owner:  gaming-hacker
     Type:  defect  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.8.1
 Keywords:          |       Port:  hashcat
--------------------+---------------------------
 hashcat is a tool designed to run on GPUs, not CPUs. It has a range of
 code to detect available GPUs. It appears to be unable to use the GPU of
 the Apple M1 Max chip on my mac.

 **To reproduce**: Perform any crack attempt, e.g. the one described in
 their [https://github.com/hashcat/hashcat/blob/master/example0.sh
 example0.sh]:
 {{{
 % hashcat -m 0 -t 32 -a 7 /opt/local/share/doc/hashcat/example0.hash
 '?a?a?a?a' /opt/local/share/doc/hashcat/example.dict
 }}}

 **Observed behaviour**:
 {{{
 % hashcat -m 0 -t 32 -a 7 /opt/local/share/doc/hashcat/example0.hash
 '?a?a?a?a' /opt/local/share/doc/hashcat/example.dict
 hashcat (v6.2.5) starting

 No devices found/left.

 Started: Sun Oct 15 18:21:43 2023
 Stopped: Sun Oct 15 18:21:43 2023
 }}}

 The message "No devices found/left" seems to say that hashcat was unable
 to find the M1 Max GPU, so gave up.

 **Expected behaviour**:
 No error message, "No devices found/left".

 Hashcat successfully cracks the example password.

 **Discussion**:

 My Mac is a MacBookPro18,2, with an Apple M1 Max chip having 10 cores (8
 performance and 2 efficiency).

 This is what Hashcat detects for my GPUs:

 {{{
 % hashcat -I
 hashcat (v6.2.5) starting in backend information mode

 OpenCL Info:
 ============

 OpenCL Platform ID #1
   Vendor..: Apple
   Name....: Apple
   Version.: OpenCL 1.2 (Aug 17 2023 05:46:52)

   Backend Device ID #1
     Type...........: GPU
     Vendor.ID......: 2
     Vendor.........: Apple
     Name...........: Apple M1 Max
     Version........: OpenCL 1.2
     Processor(s)...: 32
     Clock..........: 1000
     Memory.Total...: 49152 MB (limited to 4608 MB allocatable in one
 block)
     Memory.Free....: 24512 MB
     OpenCL.Version.: OpenCL C 1.2
     Driver.Version.: 1.2 1.0
 }}}

 The `-D 2` option apparently forces hashcat to choose a GPU over a CPU to
 use for its work. When I include that option, I get a runtime error:
 {{{
 % hashcat -D 2 -m 0 -t 32 -a 7 /opt/local/share/doc/hashcat/example0.hash
 '?a?a?a?a' /opt/local/share/doc/hashcat/example.dict
 hashcat (v6.2.5) starting

 * Device #1: Apple's OpenCL drivers (GPU) are known to be unreliable.
              You have been warned.

 OpenCL API (OpenCL 1.2 (Aug 17 2023 05:46:52)) - Platform #1 [Apple]
 ====================================================================
 * Device #1: Apple M1 Max, 24512/49152 MB (4608 MB allocatable), 32MCU

 Minimum password length supported by kernel: 0
 Maximum password length supported by kernel: 256

 Dictionary cache built:
 * Filename..: /opt/local/share/doc/hashcat/example.dict
 * Passwords.: 128416
 * Bytes.....: 1069601
 * Keyspace..: 128416
 * Runtime...: 0 secs

 Hashes: 6494 digests; 6494 unique digests, 1 unique salts
 Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13
 rotates

 Optimizers applied:
 * Zero-Byte
 * Early-Skip
 * Not-Salted
 * Not-Iterated
 * Single-Salt
 * Raw-Hash

 ATTENTION! Pure (unoptimized) backend kernels selected.
 Pure kernels can crack longer passwords, but drastically reduce
 performance.
 If you want to switch to optimized kernels, append -O to your commandline.
 See the above message to find out about the exact limits.

 Watchdog: Hardware monitoring interface not found on your system.
 Watchdog: Temperature abort trigger disabled.

 Initializing backend runtime for device #1. Please be
 patient...UNSUPPORTED (log once): buildComputeProgram: cl2Metal failed
 clBuildProgram(): CL_BUILD_PROGRAM_FAILURE

 Compilation failed:

 program_source:7:10: fatal error: 'inc_vendor.h' file not found
 #include "inc_vendor.h"
          ^~~~~~~~~~~~~~

 * Device #1: Kernel /opt/local/share/hashcat/OpenCL/shared.cl build
 failed.

 Started: Sun Oct 15 18:30:21 2023
 Stopped: Sun Oct 15 18:30:25 2023
 }}}

 Adding the `-O` option does not change the end result: failure, with the
 same message.

 The
 [​https://hashcat.net/wiki/doku.php?id=frequently_asked_questions#installation
 Hashcat project's installation FAQ] mentions Windows and Linux, but not
 macOS. It mentions OpenCL, AMD, and nVidia, but not Apple or Apple's
 [https://developer.apple.com/documentation/metal/ Metal framework]. Their
 [https://hashcat.net/wiki/doku.php?id=frequently_asked_questions#how_can_i_make_sure_that_my_gpu_is_supported
 Supported GPUs FAQ] similarly does not mention Apple or Apple Silicon or
 M1. It is interesting that the error message does mention "metal",
 however.

-- 
Ticket URL: <https://trac.macports.org/ticket/68483>
MacPorts <https://www.macports.org/>
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