---
name: "nvme-gen-dhchap-key"
section: "1"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nvme-gen-dhchap-key"
---

# nvme-gen-dhchap-key(1)

Generate a host DH-HMAC-CHAP secret (deprecated)

## 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)](/nvme-keys-gen-kxchap-secret/1.md), 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)](/nvme-keys-gen-kxchap-secret/1.md) 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. Other versions are rejected.

- \--quiet

  Suppress informational messages. Errors are still reported, and --quiet cancels any --verbose for the library log level.

- \--set-options=\<key=value\>\[,\<key=value\>...\]

  Set libnvme library options for this invocation. Supported keys are *force-4k*, *mi-probe-enabled*, *test-base-dir* and *test-sysfs-dir*.

- \--timeout=\<ms\>

  Set the timeout for the command in milliseconds. *infinite* or *-1* waits without a time limit (0xffffffff).

- \-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)](/nvme-cli.conf/5.md). 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)](/nvme-keys-gen-kxchap-secret/1.md)