# An ACME Shell script: acme.sh
- An ACME protocol client written purely in Shell (Unix shell) language.
- Fully ACME protocol implementation.
- Simple, powerful and very easy to use. You only need 3 minutes to learn.
- Bash, dash and sh compatible. 
- Simplest shell script for Let's Encrypt free certificate client.
- Purely written in Shell with no dependencies on python or Let's Encrypt official client.
- Just one script, to issue, renew and install your certificates automatically.
- DOES NOT require `root/sudoer` access.

It's probably the `easiest&smallest&smartest` shell script to automatically issue & renew the free certificates from Let's Encrypt.


Wiki: https://github.com/Neilpang/acme.sh/wiki

# [中文说明](https://github.com/Neilpang/acme.sh/wiki/%E8%AF%B4%E6%98%8E)

#Tested OS
| NO | Status| Platform|
|----|-------|---------|
|1|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/ubuntu-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)| Ubuntu
|2|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/debian-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)| Debian
|3|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/centos-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|CentOS
|4|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/windows-cygwin.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Windows (cygwin with curl, openssl and crontab included)
|5|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/freebsd.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|FreeBSD
|6|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/pfsense.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|pfsense
|7|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/opensuse-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|openSUSE
|8|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/alpine-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Alpine Linux (with curl)
|9|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/base-archlinux.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Archlinux
|10|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/fedora-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|fedora
|11|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/kalilinux-kali-linux-docker.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Kali Linux
|12|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/oraclelinux-latest.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Oracle Linux
|13|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/proxmox.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)| Proxmox https://pve.proxmox.com/wiki/HTTPSCertificateConfiguration#Let.27s_Encrypt_using_acme.sh
|14|-----| Cloud Linux  https://github.com/Neilpang/le/issues/111
|15|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/openbsd.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|OpenBSD
|16|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/mageia.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Mageia
|17|-----| OpenWRT: Tested and working. See [wiki page](https://github.com/Neilpang/acme.sh/wiki/How-to-run-on-OpenWRT)
|18|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/solaris.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|SunOS/Solaris
|19|[![](https://cdn.rawgit.com/Neilpang/acmetest/master/status/gentoo-stage3-amd64.svg)](https://github.com/Neilpang/letest#here-are-the-latest-status)|Gentoo Linux

For all build statuses, check our [daily build project](https://github.com/Neilpang/acmetest): 

https://github.com/Neilpang/acmetest

# Supported Mode

1. Webroot mode
2. Standalone mode
3. Apache mode
4. Dns mode



# 1. How to install

### 1. Install online:

Check this project: https://github.com/Neilpang/get.acme.sh

```bash
curl https://get.acme.sh | sh

```

Or:

```bash
wget -O -  https://get.acme.sh | sh

```


### 2. Or, Install from git:

Clone this project: 

```bash
git clone https://github.com/Neilpang/acme.sh.git
cd ./acme.sh
./acme.sh --install
```

You `don't have to be root` then, although `it is recommended`.

Advanced Installation:  https://github.com/Neilpang/acme.sh/wiki/How-to-install

The installer will perform 3 actions:

1. Create and copy `acme.sh` to your home dir (`$HOME`):  `~/.acme.sh/`.
All certs will be placed in this folder.
2. Create alias for: `acme.sh=~/.acme.sh/acme.sh`. 
3. Create everyday cron job to check and renew the cert if needed.

Cron entry example:

```bash
0 0 * * * "/home/user/.acme.sh"/acme.sh --cron --home "/home/user/.acme.sh" > /dev/null
```

After the installation, you must close current terminal and reopen again to make the alias take effect.

Ok, you are ready to issue cert now.
Show help message:

```

root@v1:~# acme.sh -h

```
 
# 2. Just issue a cert:

**Example 1:** Single domain.

```bash
acme.sh --issue -d example.com -w /home/wwwroot/example.com
```

**Example 2:** Multiple domains in the same cert.

```bash
acme.sh --issue -d example.com -d www.example.com -d cp.example.com -w /home/wwwroot/example.com 
```

The parameter `/home/wwwroot/example.com` is the web root folder. You **MUST** have `write access` to this folder.

Second argument **"example.com"** is the main domain you want to issue cert for.
You must have at least a domain there.

You must point and bind all the domains to the same webroot dir: `/home/wwwroot/example.com`.

Generate/issued certs will be placed in `~/.acme.sh/example.com/`

The issued cert will be renewed every **60** days automatically.

More examples: https://github.com/Neilpang/acme.sh/wiki/How-to-issue-a-cert


# 3. Install the issued cert to apache/nginx etc.

After you issue a cert, you probably want to install/copy the cert to your nginx/apache or other servers. 
You **MUST** use this command to copy the certs to the target files,  **Do NOT** use the certs files in **.acme.sh/** folder, they are for internal use only, the folder structure may change in future.

**nginx** example
```bash
acme.sh --installcert -d example.com \
--keypath  /path/to/keyfile/in/nginx/key.pem  \
--fullchainpath path/to/fullchain/nginx/cert.pem \
--reloadcmd  "service nginx restart"
```

**apache** example
```bash
acme.sh --installcert -d example.com \
--certpath /path/to/certfile/in/apache/cert.pem  \
--keypath  /path/to/keyfile/in/apache/key.pem  \
--fullchainpath path/to/fullchain/certfile/apache/fullchain.pem \
--reloadcmd  "service apache2 restart"
```

Only the domain is required, all the other parameters are optional.

Install/copy the issued cert/key to the production apache or nginx path.

The cert will be `renewed every **60** days by default` (which is configurable). Once the cert is renewed, the apache/nginx will be automatically reloaded by the command: `service apache2 reload` or `service nginx reload`.

# 4. Use Standalone server to issue cert

**(requires you be root/sudoer, or you have permission to listen tcp 80 port)**

The tcp `80` port **MUST** be free to listen, otherwise you will be prompted to free the `80` port and try again.

```bash
acme.sh --issue --standalone -d example.com -d www.example.com -d cp.example.com
```

More examples: https://github.com/Neilpang/acme.sh/wiki/How-to-issue-a-cert

# 5. Use Standalone tls server to issue cert

**(requires you be root/sudoer, or you have permission to listen tcp 443 port)**

acme.sh supports `tls-sni-01` validation.

The tcp `443` port **MUST** be free to listen, otherwise you will be prompted to free the `443` port and try again.

```bash
acme.sh --issue --tls -d example.com -d www.example.com -d cp.example.com
```

More examples: https://github.com/Neilpang/acme.sh/wiki/How-to-issue-a-cert

# 6. Use Apache mode

**(requires you be root/sudoer, since it is required to interact with apache server)**

If you are running a web server, apache or nginx, it is recommended to use the `Webroot mode`.

Particularly, if you are running an apache server, you should use apache mode instead. This mode doesn't write any files to your web root folder.

Just set string "apache" as the second argument, it will force use of apache plugin automatically.

```
acme.sh --issue --apache -d example.com -d www.example.com -d user.example.com
```

More examples: https://github.com/Neilpang/acme.sh/wiki/How-to-issue-a-cert

# 7. Use DNS mode:

Support the `dns-01` challenge.

```bash
acme.sh --issue --dns -d example.com -d www.example.com -d user.example.com
```

You should get the output like below:

```
Add the following txt record:
Domain:_acme-challenge.example.com
Txt value:9ihDbjYfTExAYeDs4DBUeuTo18KBzwvTEjUnSwd32-c

Add the following txt record:
Domain:_acme-challenge.www.example.com
Txt value:9ihDbjxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Please add those txt records to the domains. Waiting for the dns to take effect.

```

Then just rerun with `renew` argument:

```bash
acme.sh --renew -d example.com
```

Ok, it's finished.

# 8. Automatic DNS API integration

If your DNS provider supports API access, we can use API to automatically issue the certs.

You don't have do anything manually!

### Currently acme.sh supports:

1. Cloudflare.com API
2. Dnspod.cn API
3. Cloudxns.com API
4. Godaddy.com API
5. OVH, kimsufi, soyoustart and runabove API
6. AWS Route 53, see: https://github.com/Neilpang/acme.sh/issues/65
7. PowerDNS API
8. lexicon dns api: https://github.com/Neilpang/acme.sh/wiki/How-to-use-lexicon-dns-api
   (DigitalOcean, DNSimple, DnsMadeEasy, DNSPark, EasyDNS, Namesilo, NS1, PointHQ, Rage4 and Vultr etc.)

##### More APIs are coming soon...

If your DNS provider is not on the supported list above, you can write your own script API easily. If you do please consider submitting a [Pull Request](https://github.com/Neilpang/acme.sh/pulls) and contribute to the project.

For more details: [How to use dns api](dnsapi)

# 9. Issue ECC certificate:

`Let's Encrypt` now can issue **ECDSA** certificates.

And we also support it.

Just set the `length` parameter with a prefix `ec-`.

For example:

### Single domain ECC cerfiticate:

```bash
acme.sh --issue -w /home/wwwroot/example.com -d example.com --keylength  ec-256
```

SAN multi domain ECC certificate:

```bash
acme.sh --issue -w /home/wwwroot/example.com -d example.com -d www.example.com --keylength  ec-256
```

Please look at the last parameter above.

Valid values are:

1. **ec-256 (prime256v1, "ECDSA P-256")**
2. **ec-384 (secp384r1,  "ECDSA P-384")**
3. **ec-521 (secp521r1,  "ECDSA P-521", which is not supported by Let's Encrypt yet.)**


# 10. How to renew the cert

No, you don't need to renew the certs manually.  All the certs will be renewed automatically every **60** days.

However, you can also force to renew any cert:

```
acme.sh --renew  -d  example.com --force
```

or, for ECC cert:
```
acme.sh --renew  -d  example.com  --force --ecc
```

# 11. How to upgrade `acme.sh`
acme.sh is in developing, it's strongly recommended to use the latest code.

You can update acme.sh to the latest code:
```
acme.sh --upgrade
```

You can enable auto upgrade:
```
acme.sh  --upgrade  --auto-upgrade
```
Then **acme.sh** will keep up to date automatically.

Disable auto upgrade:
```
acme.sh  --upgrade  --auto-upgrade 0
```

# 12. Issue a cert from an existing CSR

https://github.com/Neilpang/acme.sh/wiki/Issue-a-cert-from-existing-CSR


# Under the Hood

Speak ACME language using shell, directly to "Let's Encrypt".

TODO:

# Acknowledgment
1. Acme-tiny: https://github.com/diafygi/acme-tiny
2. ACME protocol: https://github.com/ietf-wg-acme/acme
3. Certbot: https://github.com/certbot/certbot

# License & Others

License is GPLv3

Please Star and Fork me.

[Issues](https://github.com/Neilpang/acme.sh/issues) and [pull requests](https://github.com/Neilpang/acme.sh/pulls) are welcomed.


# Donate
1. PayPal:  donate@acme.sh

[Donate List](https://github.com/Neilpang/acme.sh/wiki/Donate-list)

