Automatic GPG key generation script with fancy output

gen-key-script

Key-Type: 1
Key-Length: 4096
Subkey-Type: 1
Subkey-Length: 4096
Name-Real: John Doe
Name-Email: john.doe@example.com
Expire-Date: 0
%no-protection

gen-key.sh

#!/bin/bash

# Key creation
GPG_REVOKE_LOCATE="$(gpg --batch --gen-key gen-key-script 2>&1)"

# Cut GPG keyID from the key creation output (revoke location msg)
GPG_KEYID="$(echo "$GPG_REVOKE_LOCATE" | cut -d '/' -f 6 | cut -d  '.' -f 1)"

# ID Substrings from each 4 characters
GPG_KEYID4_1="${GPG_KEYID:0:4}"
GPG_KEYID4_2="${GPG_KEYID:4:4}"
GPG_KEYID4_3="${GPG_KEYID:8:4}"
GPG_KEYID4_4="${GPG_KEYID:12:4}"
GPG_KEYID4_5="${GPG_KEYID:16:4}"
GPG_KEYID4_6="${GPG_KEYID:20:4}"
GPG_KEYID4_7="${GPG_KEYID:24:4}"
GPG_KEYID4_8="${GPG_KEYID:28:4}"
GPG_KEYID4_9="${GPG_KEYID:32:4}"
GPG_KEYID4_10="${GPG_KEYID:36:4}"

# ID strings
GPG_KEYID_LAST8="                                        $GPG_KEYID4_9 $GPG_KEYID4_10"
GPG_KEYID_LAST16="                              $GPG_KEYID4_7 $GPG_KEYID4_8 $GPG_KEYID4_9 $GPG_KEYID4_10"
GPG_KEYID_ALL="$GPG_KEYID4_1 $GPG_KEYID4_2 $GPG_KEYID4_3 $GPG_KEYID4_4 $GPG_KEYID4_5 $GPG_KEYID4_6 $GPG_KEYID4_7 $GPG_KEYID4_8 $GPG_KEYID4_9 $GPG_KEYID4_10"

# Show ID strings
echo "$GPG_KEYID_LAST8"
echo "$GPG_KEYID_LAST16"
echo "$GPG_KEYID_ALL"

stdout

                                        E974 1914
                              4D4F 78F3 E974 1914
6C9A 2674 50A0 6B26 384C 4924 4D4F 78F3 E974 1914

Infinite loop example in bash:

$ while true; do ./gen-key.sh; echo ""; done

Output looks like:

                                        6D01 AD86
                              C82C E69F 6D01 AD86
EADF 6208 840C 46F6 3843 F414 C82C E69F 6D01 AD86

                                        8746 1B5B
                              1929 5E16 8746 1B5B
09C0 0483 637A 03AA CC06 FEF8 1929 5E16 8746 1B5B

                                        9F97 24DC
                              9077 70C2 9F97 24DC
7375 8A40 AEAD 7A52 6938 4F34 9077 70C2 9F97 24DC

(...snipped)