指定したドメインの DMARC のポリシーだけ取ってくるやつ

get_dmarc_policy.sh

#!/bin/bash
## how to use;
## get 1 domein;
# $ get_dmarc_policy.sh sasasin.net
# "_dmarc.sasasin.net.","reject"
## bulk get;
# $ cat domain_list.txt | xargs -L1 get_dmarc_policy.sh
# "_dmarc.example.com."
# "_dmarc.example.net.","none"
# "_dmarc.example.org.","reject"
# "_dmarc.example.jp.","quarantine"

DOMAIN_NAME="_dmarc.$1"

# requre; https://github.com/ogham/dog
timeout 2s dog --json "${DOMAIN_NAME}" TXT @1.1.1.1 \
| jq -r '.responses[].answers[].message 
    |= (
        gsub(" "; "")
        | split(";") 
        | map(select(length > 0)) 
        | map(split("=") 
        | {key: .[0], value: .[1]}) 
        | from_entries
    )' \
| jq -r '.responses[] 
    | [.queries[].name, .answers[].message.p, .answers[].message.sp]  
    | @csv'