This Go program queries the crt.sh online certificate database for SSL/TLS certificates associated with a specific domain. It outputs the certificates' details in JSON format.

• Query SSL/TLS certificates by domain.
• Outputs detailed information about each certificate in JSON format.
• Easy to use command-line interface.

• Go 1.15 or newer

Clone this repository to your local machine using:

git clone https://github.com/storbeck/crtsh-query.git
cd crtsh-query

To run the program, use the following command in the terminal:

go run main.go -domain=insecure.com

Replace insecure.com with the domain you wish to query. The program will output the certificates' details in JSON format.

[
  {
    "issuer_ca_id": 16418,
    "issuer_name": "C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3",
    "common_name": "insecure.com",
    "name_value": "issues.nmap.org\nnmap.org\nsvn.nmap.org\nwww.nmap.org",
    "id": 2549490984,
    "entry_timestamp": "2020-03-07T00:14:48.255",
    "not_before": "2020-03-06T23:14:48",
    "not_after": "2020-06-04T23:14:48",
    "serial_number": "03b5914e5f28724457a5a51ad2c494d040f6",
    "result_count": 4
  },
  ...
]

Contributions are welcome. Please open an issue first to discuss what you would like to change.

MIT