---
name: "nvme-keys-check-kxchap-secret"
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-keys-check-kxchap-secret"
---

# nvme-keys-check-kxchap-secret(1)

Check a host KX-HMAC-CHAP secret

## NAME

nvme-keys-check-kxchap-secret - Check a host KX-HMAC-CHAP secret

## SYNOPSIS

```
nvme [<global-options>] keys check-kxchap-secret [--keydata=<secret> | -d <secret>]
                        [--keyring=<name> | -k <name>]
                        [--keytype=<type> | -t <type>]
                        [--identity=<identity> | -i <identity>]
```

## DESCRIPTION

Checks if the given string is a valid KX-HMAC-CHAP host secret of the form: DHHC-1:00:ia6zGodOr4SEG0Zzaw398rpY0wqipUWj4jWjUh4HWUz6aQ2n: and prints the hash algorithm it records, the secret length, and the CRC.

If *--keydata* is not given the secret is read from stdin, which also allows checking a secret stored in a file, e.g. *nvme keys check-kxchap-secret \< keyfile*.

If *--identity* is given the specified keyring is also checked for a secret already stored under that identity (as inserted by [**nvme-keys-import**(1)](/nvme-keys-import/1.md)); the result (not loaded, loaded and matching, or loaded but different) is reported. This command never modifies the keyring.

Looking up a secret requires the *kxchap* keyring key type, which is not yet provided by any released Linux kernel; see [**nvme-keys-import**(1)](/nvme-keys-import/1.md) for details.

## OPTIONS

- \-d \<secret\>, --keydata=\<secret\>

  Secret to be checked. If not given, the secret is read from stdin.

- \-k \<name\>, --keyring=\<name\>

  Name of the keyring to check for an already loaded secret. Default is *.nvme*.

- \-t \<type\>, --keytype=\<type\>

  Key type of the secret to look up. Default is *kxchap*.

- \-i \<identity\>, --identity=\<identity\>

  Identity to look up in the keyring to check if the secret is already loaded. If not given, only the secret format is validated.

## 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