Hashcat on VPS (CPU only)

[Nism0]

Hi folks,

I'm struggling a bit with running hashcat on VPS with KVM in CPU only mode.
I installed opencl from Intel and here are some major command's output:

clinfo:

Code:

Number of platforms                              2   Platform Name                                  Intel(R) OpenCL   Platform Vendor                                Intel(R) Corporation   Platform Version                                OpenCL 1.2 LINUX   Platform Profile                                FULL_PROFILE   Platform Extensions                            cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_intel_vec_len_hint   Platform Extensions function suffix            INTEL   Platform Name                                  Clover   Platform Vendor                                Mesa   Platform Version                                OpenCL 1.1 Mesa 13.0.6   Platform Profile                                FULL_PROFILE   Platform Extensions                            cl_khr_icd   Platform Extensions function suffix            MESA   Platform Name                                  Intel(R) OpenCL Number of devices                                1   Device Name                                    Common KVM processor   Device Vendor                                  Intel(R) Corporation   Device Vendor ID                                0x8086   Device Version                                  OpenCL 1.2 (Build 37)   Driver Version                                  1.2.0.37   Device OpenCL C Version                        OpenCL C 1.2   Device Type                                    CPU   Device Profile                                  FULL_PROFILE   Max compute units                              2   Max clock frequency                            0MHz   Device Partition                                (core)     Max number of sub-devices                    2     Supported partition types                    by counts, equally, by names (Intel)   Max work item dimensions                        3   Max work item sizes                            8192x8192x8192   Max work group size                            8192   Preferred work group size multiple              <getWGsizes:494: create context : error -2>   Preferred / native vector sizes                    char                                                1 / 16          short                                                1 / 8          int                                                  1 / 4          long                                                1 / 2          half                                                0 / 0        (n/a)     float                                                1 / 4          double                                              0 / 0        (n/a)   Half-precision Floating-point support          (n/a)   Single-precision Floating-point support        (core)     Denormals                                    Yes     Infinity and NANs                            Yes     Round to nearest                              Yes     Round to zero                                No     Round to infinity                            No     IEEE754-2008 fused multiply-add              No     Support is emulated in software              No     Correctly-rounded divide and sqrt operations  No   Double-precision Floating-point support        (n/a)   Address bits                                    64, Little-Endian   Global memory size                              2101669888 (1.957GiB)   Error Correction support                        No   Max memory allocation                          525417472 (501.1MiB)   Unified memory for Host and Device              Yes   Minimum alignment for any data type            128 bytes   Alignment of base address                      1024 bits (128 bytes)   Global Memory cache type                        Read/Write   Global Memory cache size                        524288   Global Memory cache line                        64 bytes   Image support                                  Yes     Max number of samplers per kernel            480     Max size for 1D images from buffer            32838592 pixels     Max 1D or 2D image array size                2048 images     Max 2D image size                            16384x16384 pixels     Max 3D image size                            2048x2048x2048 pixels     Max number of read image args                480     Max number of write image args                480   Local memory type                              Global   Local memory size                              32768 (32KiB)   Max constant buffer size                        131072 (128KiB)   Max number of constant args                    480   Max size of kernel argument                    3840 (3.75KiB)   Queue properties                                    Out-of-order execution                        Yes     Profiling                                    Yes     Local thread execution (Intel)                Yes   Prefer user sync for interop                    No   Profiling timer resolution                      1ns   Execution capabilities                              Run OpenCL kernels                            Yes     Run native kernels                            Yes     SPIR versions                                1.2   printf() buffer size                            1048576 (1024KiB)   Built-in kernels                                  Device Available                                Yes   Compiler Available                              Yes   Linker Available                                Yes   Device Extensions                              cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_intel_vec_len_hint   Platform Name                                  Clover Number of devices                                0 NULL platform behavior   clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  Intel(R) OpenCL   clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)  Success [INTEL]   clCreateContext(NULL, ...) [default]            <checkNullCtx:2241: create context with device from default platform : error -2>   clCreateContext(NULL, ...) [other]              <error: no devices in non-default plaforms>   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  No devices available in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL)  No devices available in platform ICD loader properties   ICD loader Name                                OpenCL ICD Loader   ICD loader Vendor                              OCL Icd free software   ICD loader Version                              2.2.11   ICD loader Profile                              OpenCL 2.1

lscpu:

Code:

Architecture:          x86_64 CPU op-mode(s):        32-bit, 64-bit Byte Order:            Little Endian CPU(s):                2 On-line CPU(s) list:  0,1 Thread(s) per core:    1 Core(s) per socket:    2 Socket(s):            1 NUMA node(s):          1 Vendor ID:            GenuineIntel CPU family:            15 Model:                6 Model name:            Common KVM processor Stepping:              1 CPU MHz:              2599.998 BogoMIPS:              5199.99 Hypervisor vendor:    KVM Virtualization type:  full L1d cache:            32K L1i cache:            32K L2 cache:              4096K L3 cache:              16384K NUMA node0 CPU(s):    0,1

hashcat -I

Code:

hashcat (v3.30) starting... clGetDeviceIDs(): CL_DEVICE_NOT_FOUND OpenCL Info: Platform ID #1   Vendor  : Intel(R) Corporation   Name    : Intel(R) OpenCL   Version : OpenCL 1.2 LINUX   Device ID #1     Type          : CPU     Vendor ID      : 8     Vendor        : Intel(R) Corporation     Name          : Common KVM processor     Version        : OpenCL 1.2 (Build 37)     Processor(s)  : 2     Clock          : 0     Memory        : 501/2004 MB allocatable     OpenCL Version : OpenCL C 1.2     Driver Version : 1.2.0.37 Platform ID #2   Vendor  : Mesa   Name    : Clover   Version : OpenCL 1.1 Mesa 13.0.6

Note, that I also tried HC 4 and 5 but none of this seemed to work.
I tried running a benchmark like this:

Code:

nism0@smoke:~$ hashcat -b -D1 hashcat (v3.30) starting in benchmark mode... clGetDeviceIDs(): CL_DEVICE_NOT_FOUND OpenCL Platform #1: Intel(R) Corporation ======================================== * Device #1: Common KVM processor, 501/2004 MB allocatable, 2MCU OpenCL Platform #2: Mesa, skipped or no OpenCL compatible devices found Hashtype: MD4 clCreateContext(): CL_UNKNOWN_ERROR Started: Mon Jan 13 14:53:03 2020 Stopped: Mon Jan 13 14:53:04 2020 nism0@smoke:~$

Any help would be apprecieated.

[blacktraffic]

undeath edit: removed completely useless and excessive quote

I have to add "--force" on mine to get it to run on Intel at all... but I don't have hc 3.3 to test with I'm afraid.

[Nism0]

--force does not work either...

[philsmd]

Why would you even think about using these old versions of hashcat ?

Do not use --force

uninstall all the non-vendor drivers (the open source drivers like Mesa/Pocl etc)

Try to fix the clinfo error first, clinfo clearly says it failed to use this device

Code:

clCreateContext(NULL, ...) [default] <checkNullCtx:2241: create context with device from default platform : error -2>

clCreateContext failed with error code -2

even a tool as simple as clinfo failed to use your devices

What hardware do you even use ?

You should probably better test with release, or beta version from https://hashcat.net/beta), not with older versions of hashcat.

[dizcza]

Dear hashcat folks,
I experience a similar issue with hashcat (master branch) on CPU-only VPS. Here is my OS & CPU info:

Code:

$ lsb_release -a LSB Version: core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch Distributor ID: Ubuntu Description: Ubuntu 18.04.4 LTS Release: 18.04 Codename: bionic $ lscpu Architecture:        x86_64 CPU op-mode(s):      32-bit, 64-bit Byte Order:          Little Endian CPU(s):              2 On-line CPU(s) list: 0,1 Thread(s) per core:  1 Core(s) per socket:  2 Socket(s):          1 NUMA node(s):        1 Vendor ID:          GenuineIntel CPU family:          15 Model:              6 Model name:          Common KVM processor Stepping:            1 CPU MHz:            1795.672 BogoMIPS:            3591.34 Hypervisor vendor:  KVM Virtualization type: full L1d cache:          32K L1i cache:          32K L2 cache:            4096K L3 cache:            16384K NUMA node0 CPU(s):  0,1 Flags:              fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx lm constant_tsc nopl xtopology cpuid tsc_known_freq pni cx16 x2apic hypervisor lahf_lm cpuid_fault pti

In all three experiments below the master branch of hashcat is built and used.

1. Installing official Intel OpenCL CPU runtime (l_opencl_p_18.1.0.015) makes hashcat still complaining:

Code:

$ hashcat -m2500 -b hashcat (v5.1.0-1861-g323e7463) starting in benchmark mode... Benchmarking uses hand-optimized kernel code by default. You can use it in your cracking session by setting the -O option. Note: Using optimized kernel code limits the maximum supported password length. To disable the optimized kernel code in benchmark mode, use the -w option. Kernel /usr/local/share/hashcat/OpenCL/m02500-optimized.cl: Optimized kernel requested but not needed - falling back to pure kernel clCreateContext(): CL_DEVICE_NOT_AVAILABLE Started: Fri Jun 12 09:08:03 2020 Stopped: Fri Jun 12 09:08:03 2020

Hashcat hangs at this point and I CTRL+C the execution. Also, clinfo hangs as well:

Code:

$ clinfo Number of platforms                              1   Platform Name                                  Intel(R) CPU Runtime for OpenCL(TM) Applications   Platform Vendor                                Intel(R) Corporation   Platform Version                                OpenCL 2.1 LINUX   Platform Profile                                FULL_PROFILE   Platform Extensions                            cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_khr_image2d_from_buffer cl_intel_vec_len_hint   Platform Host timer resolution                  1ns   Platform Extensions function suffix            INTEL   Platform Name                                  Intel(R) CPU Runtime for OpenCL(TM) Applications Number of devices                                1   Device Name                                    Common KVM processor   Device Vendor                                  Intel(R) Corporation   Device Vendor ID                                0x8086   Device Version                                  OpenCL 2.1 (Build 0)   Driver Version                                  18.1.0.0920   Device OpenCL C Version                        OpenCL C 2.0   Device Type                                    CPU   Device Profile                                  FULL_PROFILE   Device Available                                Yes   Compiler Available                              Yes   Linker Available                                Yes   Max compute units                              2   Max clock frequency                            0MHz   Device Partition                                (core)     Max number of sub-devices                    2     Supported partition types                    by counts, equally, by names (Intel)   Max work item dimensions                        3   Max work item sizes                            8192x8192x8192   Max work group size                            8192   Preferred work group size multiple              <getWGsizes:671: create context : error -2>   Max sub-groups per work group                  1   Preferred / native vector sizes                    char                                                1 / 16          short                                                1 / 8          int                                                  1 / 4          long                                                1 / 2          half                                                0 / 0        (n/a)     float                                                1 / 4          double                                              0 / 0        (n/a)   Half-precision Floating-point support          (n/a)   Single-precision Floating-point support        (core)     Denormals                                    Yes     Infinity and NANs                            Yes     Round to nearest                              Yes     Round to zero                                No     Round to infinity                            No     IEEE754-2008 fused multiply-add              No     Support is emulated in software              No     Correctly-rounded divide and sqrt operations  No   Double-precision Floating-point support        (n/a)   Address bits                                    64, Little-Endian   Global memory size                              4136087552 (3.852GiB)   Error Correction support                        No   Max memory allocation                          1034021888 (986.1MiB)   Unified memory for Host and Device              Yes   Shared Virtual Memory (SVM) capabilities        (core)     Coarse-grained buffer sharing                Yes     Fine-grained buffer sharing                  Yes     Fine-grained system sharing                  Yes     Atomics                                      Yes   Minimum alignment for any data type            128 bytes   Alignment of base address                      1024 bits (128 bytes)   Preferred alignment for atomics                    SVM                                          64 bytes     Global                                        64 bytes     Local                                        0 bytes   Max size for global variable                    65536 (64KiB)   Preferred total size of global vars            65536 (64KiB)   Global Memory cache type                        Read/Write   Global Memory cache size                        524288 (512KiB)   Global Memory cache line size                  64 bytes   Image support                                  Yes     Max number of samplers per kernel            480     Max size for 1D images from buffer            64626368 pixels     Max 1D or 2D image array size                2048 images     Base address alignment for 2D image buffers  64 bytes     Pitch alignment for 2D image buffers          64 pixels     Max 2D image size                            16384x16384 pixels     Max 3D image size                            2048x2048x2048 pixels     Max number of read image args                480     Max number of write image args                480     Max number of read/write image args          480   Max number of pipe args                        16   Max active pipe reservations                    131071   Max pipe packet size                            1024   Local memory type                              Global   Local memory size                              32768 (32KiB)   Max number of constant args                    480   Max constant buffer size                        131072 (128KiB)   Max size of kernel argument                    3840 (3.75KiB)   Queue properties (on host)                          Out-of-order execution                        Yes     Profiling                                    Yes     Local thread execution (Intel)                Yes   Queue properties (on device)                        Out-of-order execution                        Yes     Profiling                                    Yes     Preferred size                                4294967295 (4GiB)     Max size                                      4294967295 (4GiB)   Max queues on device                            4294967295   Max events on device                            4294967295   Prefer user sync for interop                    No   Profiling timer resolution                      1ns   Execution capabilities                              Run OpenCL kernels                            Yes     Run native kernels                            Yes     Sub-group independent forward progress        No     IL version                                    SPIR-V_1.0     SPIR versions                                1.2   printf() buffer size                            1048576 (1024KiB)   Built-in kernels                                  Device Extensions                              cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_khr_image2d_from_buffer cl_intel_vec_len_hint NULL platform behavior   clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  No platform   clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)  No platform   clCreateContext(NULL, ...) [default]            No platform   clCreateContext(NULL, ...) [other]              <checkNullCtx:2694: create context with device from non-default platform : error -2>   clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT)  No platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  No platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  No platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR)  No platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM)  No platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL)  No platform

2. I tried mesa-opencl-icd driver with no luck.

Code:

$ hashcat -m2500 -b hashcat (v5.1.0-1855-g5775231c) starting in benchmark mode... Benchmarking uses hand-optimized kernel code by default. You can use it in your cracking session by setting the -O option. Note: Using optimized kernel code limits the maximum supported password length. To disable the optimized kernel code in benchmark mode, use the -w option. Kernel /usr/local/share/hashcat/OpenCL/m02500-optimized.cl: Optimized kernel requested but not needed - falling back to pure kernel clGetDeviceIDs(): CL_DEVICE_NOT_FOUND clGetDeviceIDs(): CL_DEVICE_NOT_FOUND Started: Thu Jun 11 22:15:50 2020 Stopped: Thu Jun 11 22:15:50 2020

The output of clinfo:

Code:

$ clinfo Number of platforms                              1   Platform Name                                  Clover   Platform Vendor                                Mesa   Platform Version                                OpenCL 1.1 Mesa 20.0.4   Platform Profile                                FULL_PROFILE   Platform Extensions                            cl_khr_icd   Platform Extensions function suffix            MESA   Platform Name                                  Clover Number of devices                                0 NULL platform behavior   clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  Clover   clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)    clCreateContext(NULL, ...) [default]            No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL)  No devices found in platform ICD loader properties   ICD loader Name                                OpenCL ICD Loader   ICD loader Vendor                              OCL Icd free software   ICD loader Version                              2.2.11   ICD loader Profile                              OpenCL 2.1

At least, both clinfo and hashcat commands do not hang.

3. At last, I tried pocl-opencl-icd driver. But hashcat complains about an outdated driver:

Code:

$ hashcat -m2500 -b hashcat (v5.1.0-1861-g323e7463) starting in benchmark mode... Benchmarking uses hand-optimized kernel code by default. You can use it in your cracking session by setting the -O option. Note: Using optimized kernel code limits the maximum supported password length. To disable the optimized kernel code in benchmark mode, use the -w option. Kernel /usr/local/share/hashcat/OpenCL/m02500-optimized.cl: Optimized kernel requested but not needed - falling back to pure kernel * Device #1: Outdated POCL OpenCL driver detected! This OpenCL driver has been marked as likely to fail kernel compilation or to produce false negatives. You can use --force to override this, but do not report related errors. No devices found/left. Started: Fri Jun 12 09:29:39 2020 Stopped: Fri Jun 12 09:29:39 2020

So I ran with --force flag and got the speed of

Code:

Speed.#1.........:      333 H/s (86.02ms) @ Accel:128 Loops:1024 Thr:1 Vec:4

The output of clinfo is

Code:

$ clinfo Number of platforms                              1   Platform Name                                  Portable Computing Language   Platform Vendor                                The pocl project   Platform Version                                OpenCL 1.2 pocl 1.4, None+Asserts, LLVM 9.0.1, RELOC, SLEEF, DISTRO, POCL_DEBUG   Platform Profile                                FULL_PROFILE   Platform Extensions                            cl_khr_icd   Platform Extensions function suffix            POCL   Platform Name                                  Portable Computing Language Number of devices                                1   Device Name                                    pthread-Common KVM processor   Device Vendor                                  GenuineIntel   Device Vendor ID                                0x6c636f70   Device Version                                  OpenCL 1.2 pocl HSTR: pthread-x86_64-pc-linux-gnu-nocona   Driver Version                                  1.4   Device OpenCL C Version                        OpenCL C 1.2 pocl   Device Type                                    CPU   Device Profile                                  FULL_PROFILE   Device Available                                Yes   Compiler Available                              Yes   Linker Available                                Yes   Max compute units                              2   Max clock frequency                            1795MHz   Device Partition                                (core)     Max number of sub-devices                    2     Supported partition types                    equally, by counts     Supported affinity domains                    (n/a)   Max work item dimensions                        3   Max work item sizes                            4096x4096x4096   Max work group size                            4096   Preferred work group size multiple              8   Preferred / native vector sizes                    char                                                16 / 16          short                                                8 / 8          int                                                  4 / 4          long                                                2 / 2          half                                                0 / 0        (n/a)     float                                                4 / 4          double                                              2 / 2        (cl_khr_fp64)   Half-precision Floating-point support          (n/a)   Single-precision Floating-point support        (core)     Denormals                                    Yes     Infinity and NANs                            Yes     Round to nearest                              Yes     Round to zero                                Yes     Round to infinity                            Yes     IEEE754-2008 fused multiply-add              No     Support is emulated in software              No     Correctly-rounded divide and sqrt operations  Yes   Double-precision Floating-point support        (cl_khr_fp64)     Denormals                                    Yes     Infinity and NANs                            Yes     Round to nearest                              Yes     Round to zero                                Yes     Round to infinity                            Yes     IEEE754-2008 fused multiply-add              Yes     Support is emulated in software              No   Address bits                                    64, Little-Endian   Global memory size                              3102065664 (2.889GiB)   Error Correction support                        No   Max memory allocation                          1073741824 (1024MiB)   Unified memory for Host and Device              Yes   Minimum alignment for any data type            128 bytes   Alignment of base address                      1024 bits (128 bytes)   Global Memory cache type                        Read/Write   Global Memory cache size                        16777216 (16MiB)   Global Memory cache line size                  64 bytes   Image support                                  Yes     Max number of samplers per kernel            16     Max size for 1D images from buffer            67108864 pixels     Max 1D or 2D image array size                2048 images     Max 2D image size                            8192x8192 pixels     Max 3D image size                            2048x2048x2048 pixels     Max number of read image args                128     Max number of write image args                128   Local memory type                              Global   Local memory size                              8388608 (8MiB)   Max number of constant args                    8   Max constant buffer size                        8388608 (8MiB)   Max size of kernel argument                    1024   Queue properties                                    Out-of-order execution                        Yes     Profiling                                    Yes   Prefer user sync for interop                    Yes   Profiling timer resolution                      1ns   Execution capabilities                              Run OpenCL kernels                            Yes     Run native kernels                            Yes   printf() buffer size                            16777216 (16MiB)   Built-in kernels                                (n/a)   Device Extensions                              cl_khr_byte_addressable_store cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_3d_image_writes cl_khr_fp64 cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_fp64 NULL platform behavior   clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  Portable Computing Language   clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)  Success [POCL]   clCreateContext(NULL, ...) [default]            Success [POCL]   clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT)  Success (1)     Platform Name                                Portable Computing Language     Device Name                                  pthread-Common KVM processor   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  Success (1)     Platform Name                                Portable Computing Language     Device Name                                  pthread-Common KVM processor   clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM)  No devices found in platform   clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL)  Success (1)     Platform Name                                Portable Computing Language     Device Name                                  pthread-Common KVM processor ICD loader properties   ICD loader Name                                OpenCL ICD Loader   ICD loader Vendor                              OCL Icd free software   ICD loader Version                              2.2.11   ICD loader Profile                              OpenCL 2.1

But I don't want to use the outdated POCL driver, obviously. What would you suggest to try else?

Thank you.

[philsmd]

try latest beta version of hashcat from https://hashcat.net/beta/

if it's really an intel CPU, you should install the intel OpenCL runtime from: https://software.intel.com/content/www/u...pu-section

if you really want to use POCL, use the latest version. Compile it like this (after uninstalling all the other drivers and older versions of POCL):

Code:

sudo apt install -y build-essential ocl-icd-libopencl1 cmake git pkg-config libclang-dev clang llvm make ninja-build ocl-icd-libopencl1 ocl-icd-dev ocl-icd-opencl-dev libhwloc-dev zlib1g zlib1g-dev clinfo dialog apt-utils git clone https://github.com/pocl/pocl cd pocl/ mkdir build/ cd build/ cmake .. make sudo make install sudo cp pocl.icd /etc/OpenCL/vendors/

(see https://github.com/hashcat/hashcat/issue...-628732757)

[dizcza]

 try latest beta version of hashcat from https://hashcat.net/beta/

This is equivalent to building the hashcat master branch, isn't it? Anyway, I tried it and got the same results.

if it's really an intel CPU, you should install the intel OpenCL runtime from: https://software.intel.com/content/www/u...pu-section

This is exactly what I've done. Eventually, you need to download the 'l_opencl_p_18.1.0.015' file from their website. But then even clinfo fails to recognize the driver (it hangs). But, I mean, if my CPU is not Intel, what else could it be?

if you really want to use POCL, use the latest version. Compile it like this (after uninstalling all the other drivers and older versions of POCL):

Thank you, that worked out. I get the same benchmark speed though, but at least I don't need the --force flag. In the issue you quoted you said that POCL v1.5 with LLVM 9 works as fast as Intel and may be even faster. So I guess I'll stick to POCL for a while.