---
name: "swtpm-localca.conf"
section: "5"
platform: "linux"
package: "swtpm"
version: "0.10.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/swtpm-localca.conf"
---

# swtpm-localca.conf(5)

Configuration file for swtpm\_localca

## NAME

swtpm-localca.conf - Configuration file for swtpm\_localca

## DESCRIPTION

The file */etc/swtpm-localca.conf* contains configuration variables for the *swtpm\_localca* program.

Entries may contain environment variables that will be resolved. All environment variables must be formatted like this: '${varname}'.

Users may write their own configuration into *${XDG\_CONFIG\_HOME}/swtpm-localca.conf* or if XDG\_CONFIG\_HOME is not set it may be in *${HOME}/.config/swtpm-localca.conf*.

The following configuration variables are supported:

- **statedir**

  The name of a directory where to store data into. A lock will be created in this directory.

- **signinkey**

  The file containing the key used for signing the certificates. Provide a key in PEM format or a pkcs11 URI.

- **signingkey\_password**

  The password to use for the signing key.

- **issuercert**

  The file containing the certificate for this CA. Provide a certificate in PEM format.

- **certserial**

  The name of file containing the serial number for the next certificate.

  The serial number must be a decimal number and must be representable with 20 bytes or less. Once 21 bytes are used a new random serial number with 20 decimal digits will be created.

- **TSS\_TCSD\_HOSTNAME**

  This variable can be set to the host where **tcsd** is running on in case the signing key is a GnuTLS TPM 1.2 key. By default *localhost* will be used.

- **TSS\_TCSD\_PORT**

  This variable can be set to the port on which  **tcsd** is listening for connections. By default port *30003* will be used.

- **env:\<environment variable name**=\<value\>\>

  Environment variables, that are needed by pkcs11 modules, can be set using this format. An example for such an environment variable may look like this:

  ```
      env:MY_MODULE_PKCS11_CONFIG = /tmp/mymodule-pkcs11.conf
  ```

  The line must not contain any trailing spaces.

## EXAMPLE

An example *swtpm-localca.conf* file may look as follows:

```
 statedir = /var/lib/swtpm_localca
 signingkey = /var/lib/swtpm_localca/signkey.pem
 issuercert = /var/lib/swtpm_localca/issuercert.pem
 certserial = /var/lib/swtpm_localca/certserial
```

With a PKCS11 URI it may look like this:

```
 statedir = /var/lib/swtpm-localca
 signingkey = pkcs11:model=SoftHSM%20v2;manufacturer=SoftHSM%20project;serial=891b99c169e41301;token=mylabel;id=%00;object=mykey;type=public
 issuercert = /var/lib/swtpm-localca/swtpm-localca-tpmca-cert.pem
 certserial = /var/lib/swtpm-localca/certserial
 SWTPM_PKCS11_PIN = 1234
```

## SEE ALSO

**swtpm\_localca**

## REPORTING BUGS

Report bugs to Stefan Berger \<stefanb@linux.vnet.ibm.com\>