/usr/share/Crack/scripts/shadmrg.sv is in crack-common 5.0a-9.3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | #!/bin/sh
###
# This program was written by and is copyright Alec Muffett 1991,
# 1992, 1993, 1994, 1995, and 1996, and is provided as part of the
# Crack v5.0 Password Cracking package.
#
# The copyright holder disclaims all responsibility or liability with
# respect to its usage or its effect upon hardware or computer
# systems, and maintains copyright as set out in the "LICENCE"
# document which accompanies distributions of Crack v5.0 and upwards.
###
SHADOW=/etc/shadow
PASSWD=/etc/passwd
(
sed -e 's/^/STAG:/' < $SHADOW
sed -e 's/^/PTAG:/' < $PASSWD
) |
awk -F: '
BEGIN {
OFS=":";
}
$1 == "STAG" {
pw[$2] = $3;
next;
}
$1 == "PTAG"{
$3 = pw[$2];
print $0;
}' |
sed -e 's/^PTAG://'
|