File Integrity

File Integrity (PDF)

NVIDIA DOCA File Integrity Application Guide

This guide provides a file integrity implementation on top of NVIDIA® BlueField® DPU.

The file integrity application exhibits how to use the DOCA Comm Channel and DOCA SHA libraries to send and receive a file securely.

The application's logic includes both a client and a server:

  • Client side – the application opens a file, calculates the SHA (secure hash algorithm) digest on it, and sends to the server the digest of the source file alongside the file itself
  • Server side – the application calculates the SHA on the received file and compares the received digest to the calculated one to check if the file has been compromised
Note:

SHA hardware acceleration is only available on the BlueField-2 DPU. The application is not supported on BlueField-3.


The file integrity application runs in both client mode (host) and server mode (DPU).

system-design-diagram.png

The file integrity application runs on top of the DOCA Comm Channel API to send and receive files from the host and DPU.

app-arch.png

  1. Connection is established on both sides by the Comm Channel API.
  2. Client submits SHA job with the DOCA SHA Library and sends the result to the server.
  3. Client sends the number of messages needed to send the content of the file.
  4. Client sends data segments in size of up to 4032 bytes.
  5. Server submits a partial SHA job on each received segment.
  6. Server sends an ACK message to the client when all parts of the file are received successfully.
  7. Server compares the received SHA to the calculated SHA.

This application leverages the following DOCA libraries:

  1. Parse application argument.
    1. Initialize arg parser resources and register DOCA general parameters.
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      doca_argp_init();

    2. Register file integrity application parameters.
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      register_file_integrity_params();

    3. Parse the arguments.
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      doca_argp_start();

      1. Parse app flags.
  2. Set queue-pair attributes.
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    set_endpoint_properties();

    1. Set maximum message size of 4032 bytes.
    2. Set maximum messages allowed on queue pair.
  3. Create Comm Channel endpoint.
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    doca_comm_channel_ep_create();

    1. Create endpoint for client/server.
  4. Create SHA context.
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    doca_sha_create();

    1. Create SHA context for submitting SHA jobs for client/server.
  5. Run client/server main logic.
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    file_integrity_client/server();

  6. Clean up the application.
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    file_integrity_cleanup();

    1. Free all application resources.

  1. Refer to the following documents:
  2. The file compression binary is located under /opt/mellanox/doca/applications/file_integrity/bin/doca_file_integrity. To build all the applications together, run:
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    cd /opt/mellanox/doca/applications/ meson build ninja -C build

  3. To build only the file integrity application:
    1. Edit the following flags in /opt/mellanox/doca/applications/meson_options.txt:
      • Set enable_all_applications to false
      • Set enable_file_integrity to true
    2. Run the commands in step 2.
      Note:

      doca_file_integrity is created under ./build/file_integrity/src/.

    Application usage:

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    Usage: doca_file_integrity [DOCA Flags] [Program Flags] DOCA Flags: -h, --help Print a help synopsis -v, --version Print program version information -l, --log-level Set the log level for the program <CRITICAL=20, ERROR=30, WARNING=40, INFO=50, DEBUG=60> Program Flags: -p, --pci-addr DOCA Comm Channel device PCI address -r, --rep-pci DOCA Comm Channel device representor PCI address -f, --file File to send by the client / File to write by the server -t, --timeout Application timeout for receiving file content messages, default is 5 sec

    Note:

    For additional information on the application, use -h option:

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    /opt/mellanox/doca/applications/file_integrity/bin/doca_file_integrity -h


  4. CLI example for running the application on BlueField:
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    /opt/mellanox/doca/applications/file_integrity/bin/doca_file_integrity -p 03:00.0 -r b1:00.0 -f recieved_data.txt

  5. CLI example for running the application on the host:
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    /opt/mellanox/doca/applications/file_integrity/bin/doca_file_integrity -p b1:00.0 -f file_data.txt

    Note:

    Refer to section "Running DOCA Application on Host" in NVIDIA DOCA Virtual Functions User Guide.

  6. To run doca_file_compression using a JSON file:
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    doca_file_integrity --json [json_file]

    For example:
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    cd /opt/mellanox/doca/applications/file_integrity/bin ./doca_file_integrity --json file_integrity_params.json


For more information, refer to NVIDIA DOCA Arg Parser Programming Guide.
Flag Type Short Flag Long Flag/JSON Key Description JSON Content
General Flags l log-level Set the log level for the application:
  • CRITICAL=20
  • ERROR=30
  • WARNING=40
  • INFO=50
  • DEBUG=60
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"log-level": 60

v version Print program version information N/A
h help Print a help synopsis N/A
Program Flags f file

For client – path to the file to be sent

For server – path to write the file into

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"file": "/tmp/data.txt"

p pci-addr DOCA Comm Channel device PCIe address
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"pci-addr": 03:00.1

r rep-pci DOCA Comm Channel device representor PCIe address
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"rep-pci": b1:00.1


  • /opt/mellanox/doca/applications/file_integrity/src

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