This tool retrieves SSL/TLS certificate reports information from the Google Transparency Report for a given domain.
Then it does a DNS resolution and HTTP/S GET requests for filtering and information purposes if the -r argument is provided.
It also performs a recursive domain discovery with a configurable depth level.
The final report is sent to stdout and the progression to stderr.
The HTML report provides a force-directed tree graph to analyze the results (thanks NorthBlue333 🎉) :
docker run --rm hessman/gcert -t root-me.org -r -l 1 -d cloudflare.com cloudflaressl.com -o html > sample.html
The sample.html HTML is available here.
The tree graph is collapsed by default only if there are more than 500 subdomains found.
By domain :
By IP :
By word :
It can be filtered by DNS resolution and last certificate issuance date.
docker pull hessman/gcert:latest
docker run --rm hessman/gcert -h
Usage: gcert -t domain.tld -r -d google.com google.fr -o html > report.html
Retrieves SSL/TLS certificate reports information from the Google Transparency Report for a given domain.
Options:
-v, --version output the current version
-t, --target [domain] set the target domain
-l, --depth-level <level> set the depth level for the recursive domain discovery (default: "0")
-o, --output-format [format] set the format for the report sent to stdout (choices: "csv", "html", "json", "none", default: "none")
-R, --only-resolved only output resolved domains
-r, --resolve perform DNS and HTTP/S checks on domains
-d, --domain-deny-list [domain...] set the deny list for domains
-wd, --word-deny-list [word...] set the deny list for words
-h, --help output usage information
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