Check a pwned password from the macOS / bash command line

pwned-passwd.sh

pwned-passwd () 
{
    history -d $((HISTCMD - 1));
    sha=$(printf $1 | sha1sum | cut -d' ' -f1 | tr [:lower:] [:upper:]);
    prefix=${sha:0:5};
    suffix=${sha:5};
    count=$(curl -Ss https://api.pwnedpasswords.com/range/$prefix | grep $suffix | cut -d':' -f2);
    [ -n "$count" ] && echo $count >&2 && return 1;
    return 0;

# Usage:
#  $ pwned-passwd Today1234
#  147
#  $ echo $?
#  1
#  $ pwned-passwd not-tonight-josephine
#  $ echo $?
#  0
}

This is a shell function so the history can be amended, removing the password from the history file.