# letsencrypt.sh [](https://travis-ci.org/lukas2511/letsencrypt.sh)
+[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=EL9BQ5FQGG73Y)
+
This is a client for signing certificates with an ACME-server (currently only provided by letsencrypt) implemented as a relatively simple bash-script.
It uses the `openssl` utility for everything related to actually handling keys and certificates, so you need to have that installed.
-Other dependencies are (for now): curl, sed
-
-Perl no longer is a dependency.
-The only remaining perl code in this repository is the script you can use to convert your existing letsencrypt-keyfile into something openssl (and this script) can read.
+Other dependencies are: curl, sed, grep, mktemp (all found on almost any system, curl being the only exception)
Current features:
- Signing of a list of domains
-- Renewal if a certificate is about to expire
+- Signing of a CSR
+- Renewal if a certificate is about to expire or SAN (subdomains) changed
- Certificate revocation
Please keep in mind that this software and even the acme-protocol are relatively young and may still have some unresolved issues.
Feel free to report any issues you find with this script or contribute by submitting a pullrequest.
-## Usage:
-
-Add domains to domains.txt like in this example:
+### Getting started
-```
-example.com www.example.com
-example.net www.example.net wiki.example.net
-```
+For getting started I recommend taking a look at [docs/domains_txt.md](docs/domains_txt.md), [docs/wellknown.md](docs/wellknown.md) and the [Usage](#usage) section on this page (you'll probably only need the `-c` option).
-This states that there should be two certificates `example.com` and `example.net`,
-with the other domains in the corresponding line being their alternative names.
+Generally you want to set up your WELLKNOWN path first, and then fill in domains.txt.
-You'll also need to set up a webserver to serve the challenge-response directory as configured with `$WELLKNOWN`,
-or you can use the hook in the script if you want to deploy it some other way (e.g. copy it to a server via scp).
+**Please note that you should use the staging URL when experimenting with this script to not hit letsencrypts rate limits.** See [docs/staging.md](docs/staging.md).
-After doing those two things you can just `./letsencrypt.sh`, and it should generate certificates.
+If you have any problems take a look at our [Troubleshooting](docs/troubleshooting.md) guide.
-It can be used inside a cronjob as it automatically detects if a certificate is about to expire.
-
-### Certificate revocation
-
-Usage: `./letsencrypt.sh revoke path/to/cert.pem`
-
-### nginx config
-
-If you want to use nginx you can set up a location block to serve your challenge responses:
+## Usage:
+```text
+Usage: ./letsencrypt.sh [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...
+
+Default command: help
+
+Commands:
+ --cron (-c) Sign/renew non-existant/changed/expiring certificates.
+ --signcsr (-s) path/to/csr.pem Sign a given CSR, output CRT on stdout (advanced usage)
+ --revoke (-r) path/to/cert.pem Revoke specified certificate
+ --cleanup (-gc) Move unused certificate files to archive directory
+ --help (-h) Show help text
+ --env (-e) Output configuration variables for use in other scripts
+
+Parameters:
+ --domain (-d) domain.tld Use specified domain name(s) instead of domains.txt entry (one certificate!)
+ --force (-x) Force renew of certificate even if it is longer valid than value in RENEW_DAYS
+ --privkey (-p) path/to/key.pem Use specified private key instead of account key (useful for revocation)
+ --config (-f) path/to/config.sh Use specified config file
+ --hook (-k) path/to/hook.sh Use specified script for hooks
+ --challenge (-t) http-01|dns-01 Which challenge should be used? Currently http-01 and dns-01 are supported
+ --algo (-a) rsa|prime256v1|secp384r1 Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
```
-location /.well-known/acme-challenge {
- root /var/www/letsencrypt;
-}
-```
-
-## Import
-
-### import-account.pl
-
-This perl-script can be used to import the account key from the original letsencrypt client.
-
-You should copy `private_key.json` to the same directory as the script.
-The json-file can be found in a subdirectory of `/etc/letsencrypt/accounts/acme-v01.api.letsencrypt.org/directory`.
-
-Usage: `./import-account.pl`
-
-### import-certs.sh
-
-This script can be used to import private keys and certificates created by the original letsencrypt client.
-
-By default it expects the certificates to be found under `/etc/letsencrypt`, which is the default output directory of the original client.
-You can change the path by setting LETSENCRYPT in your config file: ```LETSENCRYPT="/etc/letsencrypt"```.
-
-Usage: `./import-certs.sh`
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