Letsencrypt-bot

Simple letsencrypt script - can be used with cron

Built on Greenlock!

Installation

Just install with npm:

npm install -g letsencrypt-bot

Usage

letsencrypt-bot [options] [command]

Commands:

• help : Display help
• version : Display version

Options:

• -c, --conf : Path to config file (defaults to /etc/letsencrypt-bot/config.json or ~/.letsencrypt-bot.json)
• -h, --help : Output usage information
• -v, --version : Output the version number

Configuration

Letsencrypt-bot reads all its settings from a configuration file.

By default letsencrypt-bot tries to load settings from /etc/letsencrypt-bot/config.json. If the file can't be read then it tries to load from .letsencrypt-bot.json in the user's home directory.

The config file location may be overridden using the --conf argument.

The format of the config file is as follows:

{
    "acme" : "/path/to/.well-known/acme-challenge",
    "workdir" : "/path/to/ssl/directory",
    "email" : "[e-mail]",
    "domains" : [ "your.domain.com", "domain2.com" ]
}

The "acme" directory

The acme directory is used to verify that you own the domain you are requesting the ssl certificate for. You must ensure that this directory is both writable by letsencrypt-bot and accessible over the internet via your web server.

The letsencrypt service will send a special file to letsencrypt-bot and then will try to download the file from http://your.domain.com/.well-known/acme-challenge/some_special_filename. The some_special_filename will be a long string of random characters. The file itself contains a long string of random characters.

Once the letsencrypt service is able to download the file and verify its contents it will issue a set of ssl certificate files for letsencrypt-bot to download.

Note: The "acme" directory must always end with ".well-known/acme-challenge"

The "workdir" directory

Letsencrypt-bot uses this directory to both store files to keep track of the state of the letsencrypt service and to download the ssl certificates.

Once letsencrypt-bot successfully downloads the certificates you may configure your web server to load the certificates from the workdir.

The structure of the workdir is as follows:

/path/to/workdir
├── accounts
├── archive
├── live
├── renewal
├── ssl.crt
│   └── your.domain.com.crt
├── ssl.key
│   └── your.domain.com.key
├── your.domain.com.ca_bundle
└── your.domain.com.full_ca_bundle

Notice that all generated files are named after the domain you registered.

Nginx setup

For Nginx, set your ssl_certificate to your.domain.com.full_ca_bundle. Then set your ssl_certificate_key to ssl.key/your.domain.com.key.

Apache setup

For Apache set your SSLCertificateFile to ssl.crt/your.domain.com.crt and your SSLCertificateChainFile to your.domain.com.ca_bundle. Then set your SSLCertificateKeyFile to ssl.key/your.domain.com.key.