OpenBSD Shell Password Generator

20.08.2023 — OpenBSD, Shell — 1 min read

This is the code I found online.

genpass.sh

#bin/sh

# copy to /usr/local/bin
# usage: genpass [length]

LENGTH=12
if [ 0 -lt $(($1)) ]; then
  LENGTH=$1
fi

# extract enough bytes from the random number generator
dd bs=$((80*$LENGTH)) count=1 if=/dev/random 2>/dev/null | LC_CTYPE=C tr -cd 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjklmnpqrstuvwxyz' | cut -b 1-$LENGTH

Alternatively, we can use AI generated code:

genpass_strong.sh

#!/bin/ksh

# Function to generate a secure random password
generate_password() {
    local length=$1
    local charset="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_=+[]{}|;:,.<>?~"

    while [ ${#password} -lt $length ]; do
        rand_char=$(dd if=/dev/urandom bs=1 count=1 2>/dev/null | LC_CTYPE=C tr -dc "$charset")
        password="${password}${rand_char}"
    done

    echo "$password"
}

# Generate a password with a length of 12 characters
password=$(generate_password 12)

echo "Generated password: $password"