nvme-gen-dhchap-key(1)

# nvme-gen-dhchap-key(1) Manual Page

## NAME

nvme-gen-dhchap-key - Generate a host DH-HMAC-CHAP secret (deprecated)

## SYNOPSIS

    nvme [<global-options>] gen-dhchap-key [--hmac=<hmac-id> | -m <hmac-id>]
                            [--secret=<secret> | -s <secret>]
                            [--key-length=<len> | -l <len>]
                            [--nqn=<host-nqn> | -n <host-nqn>]

## DESCRIPTION

Deprecated alias for nvme-keys-gen-kxchap-secret(1), kept for scripts written against nvme-cli versions older than 3.0. It forwards to that command, with three differences from nvme-cli 2.x:

- --nqn/-n is accepted and ignored, with a warning.

- --secret/-s goes into the DHHC-1 string as it stands, where 2.x put the key transformed from it, so the output differs whenever --hmac is non-zero.

- --secret/-s with an odd number of hexadecimal characters is rejected, where 2.x padded the trailing one with a zero and emitted a secret that was never given.

New scripts should use nvme keys gen-kxchap-secret instead. This alias prints a deprecation warning on stderr and may be removed in a future release.

See nvme-keys-gen-kxchap-secret(1) for the full option reference.

## GLOBAL OPTIONS

The following options are defined at the top-level `nvme` command and are available to this subcommand:

--dry-run

  Print the command that would be executed, but do not actually execute it.

--no-ioctl-probing

  Disable probing for 64-bit IOCTL support.

--no-retries

  Disable retry logic on transient errors.

-o <fmt>
--output-format=<fmt>

  Set the reporting format to normal, tabular, 'json, or binary. Only one output format may be used at a time.

--output-format-version=<version>

  Select the output format version. Version 1 uses the original field naming, while version 2 (default) provides more consistent and script-friendly field names.

--timeout=<ms>

  Set the timeout for the command in milliseconds.

-v
--verbose

  Increase the level of detail in the output. May be specified multiple times to further increase verbosity.

These options can also be set as machine-wide defaults in nvme-cli.conf(5). A command-line flag always overrides the file.

## EXAMPLES

No Examples

## NVME

Part of the nvme-user suite

## SEE ALSO

nvme-keys-gen-kxchap-secret(1)