added password generator

profile.d/pwd.sh

@@ -0,0 +1,144 @@
+# ------------------------------------------------------------------------------
+# genpwd : generate a password with different criteria
+# default 16 car with up and low car, symbol and number
+# The function is very slow on Windows
+# ------------------------------------------------------------------------------
+genpwd()
+{
+    local length=16
+    local occurs=2 # Bug, if set to 1, seems to be ignored
+    local symb=1 maj=1 min=1 numb=1
+    local nbpwd=1
+    
+    for opt in $@; do
+	case $opt in
+	    "-h"|"--help")
+		echo "genpwd: generate a secure random password."
+		echo
+		echo "Usage: genpwd [options] [--extracars=<cars>] [--length=<n>] [nb_passwd]"
+		echo
+		echo "Options:"
+		echo "	-h, --help	Display that help screen"
+		echo "	-s, --nosymbols	Exclude symbols"
+		echo "	-n, --nonumbers	Exclude numbers"
+		echo "	-u, --noup	Exclude uppercase letters"
+		echo "	-l, --nolow	Exclude lowercase letters"
+		echo "	-e=<c>, --extracars=<c>"
+		echo "			Add the given caracters to the possible caracter list"
+		echo "	-L=<n>, --length=<n>"
+		echo "			Set length of the password (default is $length)"
+		echo "	-o=<n>, --occurences=<n>"
+		echo "			Set the maximum occurences of a same caracter (default is $occurs)"
+		echo
+		echo "If the --extracars parameter is given, at least one of the given caracter will"
+		echo "be used in the final password."
+		echo
+		echo "Please note that some caracters might be interpreted by Bash or Awk programs,"
+		echo "and thus, cannot be used without provoquing errors. Those identified caracters"
+		echo "are :"
+		echo '	* ? \ $ { }'
+		echo 
+		return 0
+		;;
+	    "-s"|"--nosymbols")
+		symb=0
+		;;
+	    "-n"|"--nonumbers")
+		numb=0
+		;;
+	    "-u"|"--noup")
+		maj=0
+		;;
+	    "-l"|"--nolow")
+		min=0
+		;;
+	    "-e"?*|"--extracars"?*)
+		local extcar=$(echo "$opt" | cut -f 2- -d '=')
+		;;
+	    "-L"?*|"--length"?*)
+		local length=$(echo "$opt" | cut -f 2- -d '=')
+		if ! [[ $length =~ ^[0-9]+$ ]]; then
+		    echo "The --length parameter requires a number."
+		    return 1
+		fi
+		;;
+	    "-o"?*|"--occurences"?*)
+		local occurs=$(echo "$opt" | cut -f 2- -d '=')
+		if ! [[ $occurs =~ ^[1-9]+$ ]]; then
+		    echo "The --occurs parameter requires a number from 1 to 9."
+		    return 1
+		fi
+		;;
+	    "-*")
+		echo "Unknow parameter ${opt}."
+		return 1
+		;;
+	    *)
+		if ! [[ $opt =~ ^[1-9]+$ ]]; then
+		    echo "Unknow parameter ${opt}."
+		    return 1
+		else
+		    local nbpwd=$opt
+		fi
+		;;
+	esac
+    done
+
+    # Function selecting a random caracter from the list in parameter
+    pickcar()
+    {
+	# When a character is picked we check if it's not appearing already twice
+	# elsewhere, we choose an other char, to compensate weak bash randomizer
+	while [[ -z $char ]]; do
+	    local char=$(echo ${1:RANDOM%${#1}:1} $RANDOM)
+	    if [[ $(awk -F"$char" '{print NF-1}' <<< "$picked") -gt $occurs ]]; then
+		unset char
+	    fi
+	done
+	picked+="$char"
+	echo "$char"
+    }
+
+    echo "Generating $nbpwd passwords, please wait..."
+    for n in $( seq 1 $nbpwd ); do
+	{
+	    local carset='' # store final caracter set to use
+	    local picked='' # store already used caracter
+	    local rlength=0 # store already assigned length of caracters
+
+	    # ?, *, $ and \ impossible to use to my knowledge as it would be interpreted
+	    if [[ $symb == 1 ]]; then
+		pickcar '!.@#&%/^-_'
+		carset+='!.@#&%/^-_'
+		(( rlength++ ))
+	    fi
+	    if [[ $numb == 1 ]]; then
+		pickcar '0123456789'
+		carset+='0123456789'
+		(( rlength++ ))
+	    fi
+	    if [[ $maj == 1 ]]; then
+		pickcar 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+		carset+='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+		(( rlength++ ))
+	    fi
+	    if [[ $min == 1 ]]; then
+		pickcar 'abcdefghijklmnopqrstuvwxyz'
+		carset+='abcdefghijklmnopqrstuvwxyz'
+		(( rlength++ ))
+	    fi
+	    if [[ -n $extcar ]]; then
+		pickcar "$extcar"
+		carset+=$extcar
+		(( rlength++ ))
+	    fi
+
+	    for i in $( seq 1 $(( $length - $rlength )) ); do
+		pickcar "$carset"
+	    done
+	} | sort -R | awk '{printf "%s", $1}'
+	unset picked carset rlength
+	echo
+    done
+}
+export -f genpwd