#!/bin/bash
# info: get user salt
# options: USER [IP] [FORMAT]
#
# The function provides users salt


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument definition
user=$1
ip=${2-127.0.0.1}
format=${3-shell}

# Includes
source $HESTIA/func/main.sh
source $HESTIA/conf/hestia.conf

time_n_date=$(date +'%T %F')
time=$(echo "$time_n_date" |cut -f 1 -d \ )
date=$(echo "$time_n_date" |cut -f 2 -d \ )

# JSON list function
json_list() {
    echo '{'
    echo '    "'$user'": {
        "METHOD": "'$method'",
        "SALT": "'$salt'",
        "TIME": "'$time'",
        "DATE": "'$date'"
        }'
    echo '}'
}

# SHELL list function
shell_list() {
    echo "METHOD:         $method"
    echo "SALT:           $salt"
}

# PLAIN list function
plain_list() {
    echo -e "$method\t$salt"
}

# CSV list function
csv_list() {
    echo "METHOD,SALT"
    echo "$method, $salt"
}


#----------------------------------------------------------#
#                    Verifications                         #
#----------------------------------------------------------#


check_args '1' "$#" 'USER [IP] [SALT]'
is_format_valid 'user'

# Checking user
if [ ! -d "$HESTIA/data/users/$user" ]; then
    echo "Error: password missmatch"
    echo "$date $time $user $ip failed to login" >> $HESTIA/log/auth.log
    exit 9
fi


#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Parsing user's salt
shadow=$(grep "^$user:" /etc/shadow | cut -f 2 -d :)

if echo "$shadow" | grep -qE '^\$[0-9a-z]+\$[^\$]+\$'
then
    salt=$(echo "$shadow" |cut -f 3 -d \$)
    method=$(echo "$shadow" |cut -f 2 -d \$)
    if [ "$method" -eq '1' ]; then
        method='md5'
    elif [ "$method" -eq '6' ]; then
        method='sha-512'
    else
        echo "Error: password missmatch"
        echo "$date $time $user $ip failed to login" >> $HESTIA/log/auth.log
        exit 9
    fi
else
    salt=${shadow:0:2}
    method='des'
fi

if [ -z "$salt" ]; then
    echo "Error: password missmatch"
    echo "$date $time $user $ip failed to login" >> $HESTIA/log/auth.log
    exit 9
fi


# Listing data
case $format in
    json)   json_list ;;
    plain)  plain_list ;;
    csv)    csv_list ;;
    shell)  shell_list ;;
esac


#----------------------------------------------------------#
#                       Hestia                             #
#----------------------------------------------------------#

# Logging

exit
