openssl s_client -showcerts -connect google.com:443 </dev/null 2>/dev/null|openssl x509 -outform PEM | python3 -c "

import sys

import json

body = {}

body['cert'] = sys.stdin.read()

json.dump(body, sys.stdout)

" | python3 -c "

import sys

import json

body = json.load(sys.stdin)

print(body['cert'])

" | openssl x509 -text; echo $?

Certificate:

Data:

    Version: 3 (0x2)

    Serial Number:

        fa:bc:89:f7:bf:33:10:94:0a:00:00:00:01:25:fd:32

    Signature Algorithm: sha256WithRSAEncryption

...

0