feat(user/bkytpldl-generic):Limit channel name to 32 bytes
[BK-2020-03.git] / user / 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: 0.0.3
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 "$gpg_text");
118 echo "$gpg_text_buffer";
119 done;
120 }; # main program
121
122 main "$@";
123
124 # Author: Steven Baltakatei Sandoval
125 # License: GPLv3+
126
127 # Dependencies
128
129 #1
130 # b2sum (GNU coreutils) 8.32
131 # Copyright (C) 2020 Free Software Foundation, Inc.
132 # License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
133 # This is free software: you are free to change and redistribute it.
134 # There is NO WARRANTY, to the extent permitted by law.
135
136 # Written by Padraig Brady and Samuel Neves.
137
138 #2
139 # gpg (GnuPG) 2.2.20
140 # libgcrypt 1.8.8
141 # Copyright (C) 2020 Free Software Foundation, Inc.
142 # License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
143 # This is free software: you are free to change and redistribute it.
144 # There is NO WARRANTY, to the extent permitted by law.
145
146 # Home: /home/baltakatei/.gnupg
147 # Supported algorithms:
148 # Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
149 # Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
150 # CAMELLIA128, CAMELLIA192, CAMELLIA256
151 # Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
152 # Compression: Uncompressed, ZIP, ZLIB, BZIP2
153
154 #3
155 # GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)
156 # Copyright (C) 2020 Free Software Foundation, Inc.
157 # License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
158
159 # This is free software; you are free to change and redistribute it.
160 # There is NO WARRANTY, to the extent permitted by law.