/usr/bin/keyart is in signing-party 2.7-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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"""This script takes a key ID, fingerprint, email address, publicly exported
key, or a keyring, and prints the random ASCII art visualization of the key
as per the Drunken Bishop algorithm as applied to OpenSSH keys by Dirk Loss."""
import argparse
import os
import re
import subprocess
import sys
PARSER = argparse.ArgumentParser(
description='Creates ASCII art from OpenPGP keys.')
PARSER.add_argument('-c', '--color', help='Print the art with ANSI color.',
action='store_true')
PARSER.add_argument('-l', '--longid', action='store_true',
help='Print the 16-character long ID of a key.')
PARSER.add_argument('-f', '--fingerprint', type=str, metavar=('HEX'),
action='append',
help='A hexadecimal string representing a fingerprint.')
PARSER.add_argument('-k', '--keyring', type=str, metavar=('KEYRING'),
action='append',
help='A publicly exported OpenPGP key or keyring.')
PARSER.add_argument('keyid', type=str, nargs='*', metavar=('KEYID'),
help='A key identifier (email, ID, fingerprint, etc.).')
ARGS = PARSER.parse_args()
def draw_art(key_size, key_algo, key_curve, key_fpr):
"""Execute the Drunken Bishop algorithm on a key."""
art = ''
f_bytes = []
pos = 104
walk = [pos]
visits = [0]*209
temp = ''
try:
key_bin = bin(int(key_fpr, 16))[2:].zfill(len(key_fpr)*4)
except ValueError:
print("The supplied fingerprint is not a hexadecimal string.")
sys.exit(3)
for i, char in enumerate(key_bin):
temp += char
if i % 2 == 1:
f_bytes.append(temp)
temp = ''
# create a little-endian bit-pair array
for i in range(0, len(f_bytes), 4):
f_bytes[i], f_bytes[i+3] = f_bytes[i+3], f_bytes[i]
f_bytes[i+1], f_bytes[i+2] = f_bytes[i+2], f_bytes[i+1]
for pair in f_bytes:
if (20 <= pos <= 36 or 39 <= pos <= 55 or 58 <= pos <= 74 or
77 <= pos <= 93 or 96 <= pos <= 112 or 115 <= pos <= 131 or
134 <= pos <= 150 or 153 <= pos <= 169 or 172 <= pos <= 188):
if pair == '00':
pos -= 20 # Square 'M'
elif pair == '01':
pos -= 18
elif pair == '10':
pos += 18
else:
pos += 20
elif 1 <= pos <= 17: # Square 'T'
if pair == '00':
pos -= 1
elif pair == '01':
pos += 1
elif pair == '10':
pos += 18
else:
pos += 20
elif 191 <= pos <= 207: # Square 'B'
if pair == '00':
pos -= 20
elif pair == '01':
pos -= 18
elif pair == '10':
pos -= 1
else:
pos += 1
elif pos in [19, 38, 57, 76, 95, 114, 133, 152, 171]: # Square 'L'
if pair == '00':
pos -= 19
elif pair == '01':
pos -= 18
elif pair == '10':
pos += 19
else:
pos += 20
elif pos in [37, 56, 75, 94, 113, 132, 151, 170, 189]: # Square 'R'
if pair == '00':
pos -= 20
elif pair == '01':
pos -= 19
elif pair == '10':
pos += 18
else:
pos += 19
elif pos == 0: # Square 'a'
if pair == '01':
pos += 1
elif pair == '10':
pos += 19
elif pair == '11':
pos += 20
elif pos == 18: # Square 'b'
if pair == '00':
pos -= 1
elif pair == '10':
pos += 18
elif pair == '11':
pos += 19
elif pos == 190: # Square 'c'
if pair == '00':
pos -= 19
elif pair == '01':
pos -= 18
elif pair == '11':
pos += 1
else: # Square 'd'
if pair == '00':
pos -= 20
elif pair == '01':
pos -= 19
elif pair == '10':
pos -= 1
walk.append(pos)
for square in walk:
visits[square] += 1
if visits[square] > 18:
visits[square] = 18
# See https://tools.ietf.org/html/rfc4880#section-9.1
# Also https://tools.ietf.org/html/rfc6637#section4
if key_algo == '1' or key_algo == '2' or key_algo == '3':
header = 'rsa' + key_size # RSA
elif key_algo == '16':
header = 'elg' + key_size # Elgamal encrypt only
elif key_algo == '17':
header = 'dsa' + key_size # DSA
elif key_algo == '20':
header = 'xxx' + key_size # Elgamal encrypt+sign (legacy)
elif key_algo == '18' or key_algo == '19' or key_algo == '22':
if key_curve is not None and key_curve != '':
header = key_curve
elif key_algo == '18':
header = 'ecdh' + key_size
elif key_algo == '19':
header = 'ecdsa' + key_size
elif key_algo == '22':
header = 'eddsa' + key_size
else:
header = 'N/A'
header = "[%s]" % header
if len(header) > 19:
header = ''
art += '+' + header.center(19, '-') + '+\n'
for i, visit in enumerate(visits):
# Build up the art with the boundaries and newlines
if i % 19 == 0:
art += "|{}"
elif i % 19 == 18:
art += "{}|\n"
else:
art += '{}'
# Insert the 'coin' into the art at this position
if i == 104: # Starting position
art = art.format(_get_coin(visit, ARGS.color, coin='S'))
elif i == walk[len(walk)-1]: # Ending position
art = art.format(_get_coin(visit, ARGS.color, coin='E'))
else:
art = art.format(_get_coin(visit, ARGS.color))
if key_size and ARGS.longid:
footer = "["+key_fpr[-16:]+"]"
elif key_size:
footer = "["+key_fpr[-8:]+"]"
else:
footer = ''
art += '+' + footer.center(19, '-') + '+'
return art
def _get_coin(num_of_hits, ansi_art=False, coin=None):
"""Returns the coin for this humber of hits. If ansi_art is enabled the coin
will be colorized with ansi codes. If coin is not None, it will use that
coin instead of the default (used for the 'S' and 'E', start end coins)."""
coins = [' ', '.', '^', ':', 'l', 'i', '?', '(', 'f', 'x', 'X', 'Z', '#',
'M', 'W', '&', '8', '%', '@']
colors = ['', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '']
reset = ''
if ansi_art:
colors = [
'', # no coin
'\033[38;5;21m', # blue (cold)
'\033[38;5;39m',
'\033[38;5;50m',
'\033[38;5;48m',
'\033[38;5;46m', # green
'\033[38;5;118m',
'\033[38;5;190m',
'\033[38;5;226m', # yellow
'\033[38;5;220m',
'\033[38;5;214m', # orange
'\033[38;5;208m',
'\033[38;5;202m',
'\033[38;5;196m', # red
'\033[38;5;203m',
'\033[38;5;210m',
'\033[38;5;217m', # pink
'\033[38;5;224m',
'\033[38;5;231m' # white (hot)
]
reset = '\033[0m'
color = colors[num_of_hits]
if not coin:
coin = coins[num_of_hits]
return '{}{}{}'.format(color, coin, reset)
def gpg_cmd(cmd):
gpg = subprocess.Popen(cmd, stdout=subprocess.PIPE)
for lines in gpg.communicate()[0].decode('ascii').split('\n'):
colons = lines.split(':')
if colons[0] == 'pub':
size = colons[2]
algo = colons[3]
curve = colons[16] if 16 < len(colons) else None
elif colons[0] == 'fpr':
print(draw_art(size, algo, curve, colons[9]))
size = None
algo = None
curve = None
if __name__ == '__main__':
gpg_bin = os.getenv('GNUPGBIN', 'gpg')
strip_nonhex = re.compile('[^a-fA-F0-9]+')
cmd = [gpg_bin, '--no-options', '--with-colons', '--fingerprint']
if ARGS.fingerprint:
for fpr in ARGS.fingerprint:
fpr = strip_nonhex.sub('',fpr)
if len(fpr) % 8 != 0:
print("Hex string must be a multiple of 8 bytes.")
sys.exit(2)
print(draw_art(None, None, fpr))
if ARGS.keyring:
cmd.append('--no-default-keyring')
cmd.extend(['--keyring=%s' % os.path.abspath(keyring)
for keyring in ARGS.keyring])
gpg_cmd(cmd)
if ARGS.keyid:
cmd.append('--')
cmd.extend(ARGS.keyid)
gpg_cmd(cmd)
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