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# Config Vault (cfgvault)
[cfgvault](https://code.kevwe.com/cfgvault.git) is a minimalistic configuration vault for your application secrets.
## A Configuration Vault Service
Config Vault exposes a Rest interface to retrieve secrets from a KeePass keystore.
## Quick Start
### Minimal Configuration File
Create the following example configuration file:
```
$ cat $HOME/.config/cfgvault/config.json
{
"endpoint":"127.0.0.1:8080",
"keystore":"/path/to/keystore.kdbx",
"secretkey":"/path/to/secretkey.keyx"
}
```
this is the minimal configuration file needed to test cfgvault locally over http or behind a reverse proxy.
The keystore and secretkey files must be created beforehand with KeePass or some compatible tool.
A proper configuration file for a production deployment should include TLS certificates and keys.
```
$ cat $HOME/.config/cfgvault/config.json
{
"endpoint":"127.0.0.1:8433",
"keystore":"/path/to/keystore.kdbx",
"secretkey":"/path/to/secretkey.keyx",
"server_tls_certificate":"/path/to/server.crt",
"server_tls_key":"/path/to/server.key"
}
```
You can enable mutual TLS by providing a CA certificate to validate client certificates against, and switching mutual
authentication on:
```
$ cat $HOME/.config/cfgvault/config.json
{
"endpoint":"127.0.0.1:8433",
"keystore":"/path/to/keystore.kdbx",
"secretkey":"/path/to/secretkey.keyx",
"server_tls_certificate":"/path/to/server.crt",
"server_tls_key":"/path/to/server.key",
"server_ca":"/path/to/ca.crt",
"validate_client_cert":true
}
```
The application allows you also to specify an array of IP subnets that are allowed to connect to the service:
```
$ cat $HOME/.config/cfgvault/config.json
{
"endpoint":"127.0.0.1:8080",
"keystore":"/path/to/keystore.kdbx",
"secretkey":"/path/to/secretkey.keyx",
"server_tls_certificate":"/path/to/server.crt",
"server_tls_key":"/path/to/server.key",
"allowlist":["127.0.0.1/8","10.2.3.4/24"],
"server_ca":"/path/to/ca.crt",
"validate_client_cert":true
}
```
All IP addresses not in the allowlist will be rejected with a 403 Forbidden response.
### Building cfgvault
```bash
cd cfgvault
cargo build --release
```
### Running cfgvault
You can just run the executable:
```bash
$ ./target/release/cfgvault
```
## Creating a Keystore file
cfgvault uses a KeePass keystore file to store your secrets.
You can create a new KeePass keystore file using the KeePass application or any compatible tool.
A lesser-known way to create a KeePass keystore file is to use the `keepassxc-cli` command-line tool.
Following we provide some examples on how to create/manage secrets in KeePass with the CLI.
### Create a Password Database
Make sure you have the `keepassxc-cli` command-line tool installed. You can create a new KeePass database with the
following command:
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
test -f ${KEYPASS_DB} && echo "db exists"
test -f ${KEYPASS_DB} && exit 1
keepassxc-cli db-create --set-key-file ${KEYPASS_FILE} ${KEYPASS_DB}
```
### Add an entry to your Passwords Database
You can do it like this:
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry_user=$1
entry=$2
keepassxc-cli add --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB} -u ${entry_user} ${entry} --password-prompt
```
or you can have your password manager to generate a password for you:
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry_user=$1
entry=$2
#keepassxc-cli add Passwords.kdbx -u larry -g wiki.gentoo.org
keepassxc-cli add --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB} -u ${entry_user} --generate ${entry}
```
### List all of the entries in your password database
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
keepassxc-cli ls --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB}
```
### Retrieve an entry
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry=$1
keepassxc-cli show -s --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB} ${entry} -a Password
```
### Delete an entry
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry=$1
keepassxc-cli rm --key-file ${KEEPASS_FILE} --no-password ${KEEPASS_DB} ${entry}
```
### Show a custom field from the selected entry
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry=$1
keepassxc-cli show -s --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB} ${entry} -a UserName
```
### Copy Secret to Clipboard
```
#! /bin/bash -x
KEYPASS_FILE=keepass.keyx
KEYPASS_DB=$HOME/.config/secure-passwords.kdbx
entry=$1
keepassxc-cli clip --key-file ${KEYPASS_FILE} --no-password ${KEYPASS_DB} ${entry}
```
## License
[cfgvault](https://code.kevwe.com/cfgvault.git) is authored by [Paolo Lulli](https://lulli.net/about) 2026 and is
publicly available under the Affero GPL license.
|