user/bk-gpgfp-noemail

   1 #!/usr/bin/env bash
   2 # Desc: Gets gpg fingerprint but replaces uid email addresses with hashes
   3 # Usage: bk-gpgfp-noemail 0xdc3469c9 74810B012346C9A6
   4 # Depends: gpg, b2sum
   5 # Version: 0.0.2
   6
   7 yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
   8 die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
   9 try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
  10 check_resembles_gpg_fingerprint() {
  11     # Desc: Checks if input string looks like gpg fingerprint
  12     # Usage: check_resembles_gpg_fingerprint arg1
  13     # Input: arg1: string
  14     # Output: exit code: 0 if arg1 is fingerprint, 1 otherwise
  15     # Depends: yell(), die(), try()
  16     # Version: 0.0.1
  17     local pattern1 pattern2 input input_length
  18
  19     # Check args
  20     if [[ $# -ne 1 ]]; then
  21         die "ERROR:Invalid number of arguments:$#";
  22     else
  23         input="$1";
  24     fi;
  25
  26     ## Trim leading `0x`
  27     pattern1="(0x)(.*)";
  28     if [[ $input =~ $pattern1 ]]; then
  29         input="${input:2}";
  30         #yell "DEBUG:input:$input";
  31     fi;
  32
  33     ## Check if char count multiple of 8
  34     input_length="${#input}";
  35     if [[ ! $(( input_length % 8 )) -eq 0 ]]; then
  36         yell "DEBUG:Length not a multiple of 8:$input_length:$input";
  37         return 1;
  38     fi;
  39
  40     ## Check if hexadecimal
  41     pattern2="[0-9A-Fa-f]{8,40}";
  42     if [[ $1 =~ $pattern2 ]]; then
  43         #yell "DEBUG:is a fingerprint:$arg";
  44         return 0;
  45     else
  46         #yell "DEBUG:Not a fingerprint:$arg";
  47         return 1;
  48     fi;
  49 }; # Checks if input string looks like gpg fingerprint
  50 main() {
  51     # Desc: main program
  52     # Depends: gpg, b2sum
  53     # Ref/Attrib: [1] Manipulating Strings. https://tldp.org/LDP/abs/html/string-manipulation.html
  54     declare -a fingerprints
  55     local gpg_text gpg_text_buffer pattern email
  56
  57     # Check arguments
  58     n=0;
  59     for arg in "$@"; do
  60         ((n++));
  61         #yell "DEBUG:n:$n";
  62         #yell "DEBUG:arg:$arg";
  63
  64         # Check if arg resembles gpg fignerprint
  65         if check_resembles_gpg_fingerprint "$arg"; then
  66             #yell "DEBUG:Resembles a gpg fingerprint:$arg";
  67             fingerprints+=("$arg");
  68             #yell "DEBUG:fingerprints:$(declare -p fingerprints)";
  69         else
  70             die "ERROR:Doesn't resemble a gpg fingerprint:$arg";
  71         fi;
  72     done;
  73
  74     # Process fingerprints
  75     for arg in "${fingerprints[@]}"; do
  76         # Get gpg fingerprint text
  77         gpg_text="$(gpg --fingerprint --fingerprint "$arg" 2>&1)";
  78         #yell "DEBUG:gpg_text:$gpg_text";
  79
  80         # Trim emails
  81         gpg_text_buffer="";
  82         while IFS= read -r line; do
  83             #yell "DEBUG:line:$line";
  84             ## Read $gpg_text line-by-line
  85
  86             # Skip lines that don't start with 'uid'
  87             pattern="^uid";
  88             if [[ ! $line =~ $pattern ]]; then
  89                 #yell "DEBUG:line doesn't start with \"uid\":$line";
  90                 gpg_text_buffer="$(printf "%s\n%s" "$gpg_text_buffer" "$line")";
  91                 continue;
  92             fi;
  93
  94             # Trim email from $line
  95             ## Get email
  96             email="$(expr match "$line" '.*\(<.*$\)')";
  97             #yell "DEBUG:email1:$email";
  98             email="${email%>*}";
  99             #yell "DEBUG:email2:$email";
 100             email="${email#*<}";
 101             #yell "DEBUG:email3:$email";
 102
 103             ## Strip email from $line
 104             line="${line% <*}"; # See [1]
 105             #yell "DEBUG:line1:$line";
 106
 107             ## Add hashed email if $email length non-zero
 108             if [[ -n $email ]]; then
 109                 email_hash="$(echo -n "$email" | b2sum -l32 | cut -d' ' -f1)"; # hash email using b2sum
 110                 #yell "DEBUG:email_hash:$email_hash";
 111                 line="$line <$email_hash>";
 112                 #yell "DEBUG:line3:$line";
 113             fi;
 114
 115             ## Append $line to $gpg_text_buffer
 116             gpg_text_buffer="$(printf "%s\n%s" "$gpg_text_buffer" "$line")";
 117             #done < <(echo "$gpg_text");
 118         done < <(printf "%s" "$gpg_text");
 119         echo "$gpg_text_buffer";
 120     done;
 121 }; # main program
 122
 123 main "$@";
 124
 125 # Author: Steven Baltakatei Sandoval
 126 # License: GPLv3+
 127
 128 # Dependencies
 129
 130 #1
 131     # b2sum (GNU coreutils) 8.32
 132     # Copyright (C) 2020 Free Software Foundation, Inc.
 133     # License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
 134     # This is free software: you are free to change and redistribute it.
 135     # There is NO WARRANTY, to the extent permitted by law.
 136
 137     # Written by Padraig Brady and Samuel Neves.
 138
 139 #2
 140     # gpg (GnuPG) 2.2.20
 141     # libgcrypt 1.8.8
 142     # Copyright (C) 2020 Free Software Foundation, Inc.
 143     # License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
 144     # This is free software: you are free to change and redistribute it.
 145     # There is NO WARRANTY, to the extent permitted by law.
 146
 147     # Home: /home/baltakatei/.gnupg
 148     # Supported algorithms:
 149     # Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
 150     # Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
 151     #       CAMELLIA128, CAMELLIA192, CAMELLIA256
 152     # Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
 153     # Compression: Uncompressed, ZIP, ZLIB, BZIP2
 154
 155 #3
 156     # GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)
 157     # Copyright (C) 2020 Free Software Foundation, Inc.
 158     # License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 159
 160     # This is free software; you are free to change and redistribute it.
 161     # There is NO WARRANTY, to the extent permitted by law.