ZeroSSL.com CA

Using ZeroSSL.com CA

ZeroSSL doesn't have rate limits. One can issue unlimited TLS/SSL certificate valid for 90 days (ref).

Note: Since v3, acme.sh uses Zerossl as the default Certificate Authority (CA). Account registration (one-time) is required before one can issue new certs. See also: https://github.com/acmesh-official/acme.sh/wiki/Change-default-CA-to-ZeroSSL

1. Register your account.

1a. With an email address

acme.sh  --register-account  -m [email protected] --server zerossl

1b. With EAB credentials

Alternatively, if you sign up for a ZeroSSL account, bootstrap acme.sh with External Account Binding (EAB) credentials, like so:

1. Generate your EAB credentials from https://app.zerossl.com/developer
2. Register your EAB credentials.

acme.sh  --register-account  --server zerossl \
        --eab-kid  xxxxxxxxxxxx  \
        --eab-hmac-key  xxxxxxxxx

Users with a ZeroSSL account can manage issued certificates from developer console.

2. Issue certificates

Use Zerossl.com with --server zerossl:

acme.sh --server zerossl  \
     --issue  -d  example.com \
     --dns dns_cf

If you don't want to specify --server zerossl every time you issue a cert, you can set zerossl as the default CA:

acme.sh --set-default-ca  --server zerossl

Read: https://github.com/acmesh-official/acme.sh/wiki/Server

Issue any cert from zerossl without having to specify --server:

acme.sh --issue -d  example.com --dns dns_cf

3. Troubleshooting

Le_OrderFinalize: A KeyID must be specified

If certificate issuance fails and you see something like this in the logs

[XYZ 18 09:50:07 -02 2020] Create new order error. Le_OrderFinalize not found. 
{"type":"urn:ietf:params:acme:error:malformed","status":400,"detail":"A Key ID MUST be specified"}

then, re-generate your EAB credentials (refer step #2) and re-run certificate issuance. See: acme.sh/issues/3310.

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