Проверка силы пароля средствами bash

ps=`echo "435Gdf-3+=534+++34-5 dfg dfg ddf 345" | sed 's/[^a-zA-Z0-9@#$%&*+-=]//g'`; if  [[ $ps =~ ([0-9]+) ]] && [[ $ps =~ ([a-z]+) ]] && [[ $ps =~ ([A-Z]+) ]] && [[ $ps =~ ([@#$%&*+-=]+) ]] && [[ ${#ps} -ge 8 ]]; then echo "password_valid" else echo "password_unvalid" fi

#!/bin/bash
pwi="$1"
rms=0
pw="${pwi:8}"
test "$pw" || { echo \""$pwi"\": shorter than 8 characters 1>&2 ; let rms="$rms|1" ; }
pw="${pwi//[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]/}"
test "$pw" || { echo \""$pwi"\": only alpha and/or digits 1>&2 ; let rms="$rms|2" ; }
pw="${pwi//[0123456789@#\$%\&*\+\-=]/}"
test "$pw" || { echo \""$pwi"\": only digits and/or symbols 1>&2 ; let rms="$rms|4" ; }
pw="${pwi//[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@#\$%\&*\+\-=]/}"
test "$pw" || { echo \""$pwi"\": only alpha and/or symbols 1>&2 ; let rms="$rms|8" ; }
exit $rms

 
#!/bin/bash
echo "enter password"
read pas

if [[ $pas =~ ([0-9]+) ]]; 
	if [[ $pas =~ ([a-z]+) ]];
		if [[ $pas =~ ([A-Z]+) ]]; 
			if [[ ${#pas} -ge 8 ]];
				if [[ $pas =~ ([\@ \$ \# \% \& \* \+ \- \=]+) ]];
				then echo "password valid"
				else echo "no punctuation"
				fi
			else echo "too short"
			fi
		else echo "no capital letters"		
		fi
	else echo "no character"
	fi
else echo "no digits"
fi

passwd.sh: line 13: syntax error near unexpected token `else'
passwd.sh: line 13: `			else echo "too short"'

#!/bin/bash

echo "enter password"
read pas

if [[ $pas =~ ([0-9]+) ]]
then
    if [[ $pas =~ ([a-z]+) ]]
    then
        if [[ $pas =~ ([A-Z]+) ]]
        then
            if [[ ${#pas} -ge 8 ]]
            then
                if [[ $pas =~ ([@$#%&*+-=]+) ]]
                then
                    echo "password valid"
                else
                    echo "no punctuation"
                fi
            else
                echo "too short"
            fi
        else
            echo "no capital letters"       
        fi
    else
        echo "no character"
    fi
else
    echo "no digits"
fi

#=/bin/bash

echo "enter password"
read PASS

RESULT=''

if [[ $PASS =~ ([0-9]+) ]]
then
	RESULT=''
else
	RESULT="no digits"
	echo $RESULT
	exit 0
fi
if [[ $PASS =~ ([a-z]+) ]]
then
	RESULT=''
else
	RESULT="no character"
	echo $RESULT
	exit 0
fi
if [[ $PASS =~ ([A-Z]+) ]]
then
	RESULT=''
else
	RESULT="no capital letters"		
	echo $RESULT
	exit 0
fi
if [[ ${#PASS} -ge 8 ]]
then
	RESULT=''
else
	RESULT="too short"
	echo $RESULT
	exit 0
fi
if [[ $PASS =~ ([[:punct:]]+) ]]
then 
	RESULT=''
else
	RESULT="no punctuation"
	echo $RESULT
	exit 0
fi

echo "Password OK"
exit 0

echo 'password' | sed -r '/[[:punct:]]/!d; /[[:lower:]]/!d; /[[:upper:]]/!d; /[[:digit:]]/!d; /.{8}+/!d; s/^.*$/OK/'

...
if [[ ! $pas =~ ([0-9]+) ]]; then echo no digits; exit; fi
if [[ ! $pas =~ ([a-z]+) ]]; then echo no lower alpha; exit; fi
...

...
test ! $pas =~ ([0-9]+) && { echo no digits; exit; }
test ! $pas =~ ([a-z]+) && { echo no lower alpha; exit; }
...