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Ein einfacher Passwortgenerator
+
Ein "einfacher" Passwortgenerator
  
 
  #!/bin/bash
 
  #!/bin/bash
Zeile 7: Zeile 7:
 
  # $1 number of characters; defaults to 20
 
  # $1 number of characters; defaults to 20
 
  #
 
  #
  # $2 charset  
+
  # $2 charset
 
  # 0 = special characters, numbers and letters (default)
 
  # 0 = special characters, numbers and letters (default)
 
  # 1 = numbers and letters
 
  # 1 = numbers and letters
 
  # 2 = letters only
 
  # 2 = letters only
 +
# 3 = numbers only
 
  #
 
  #
 
  #
 
  #
 
  # usage: pwgen.sh <LENGTH> <CHARS>
 
  # usage: pwgen.sh <LENGTH> <CHARS>
 
  #
 
  #
  # examples:  
+
  # examples:
 
  #
 
  #
 
  # length = 20, special characters, numbers and letters
 
  # length = 20, special characters, numbers and letters
  # pwgen.sh  
+
  # pwgen.sh
 
  #
 
  #
 
  # length = 10, special characters, numbers and letters
 
  # length = 10, special characters, numbers and letters
Zeile 30: Zeile 31:
 
   
 
   
 
   
 
   
 
+
_output_()
  if [ "$1" = "" ]; then
+
{
  LENGTH=20;
+
    echo
else
+
    echo "Length: $LENGTH chars"
  LENGTH=$1
+
    echo -n "Charset: "
  fi
+
    case "$CHARS" in
 +
"[:graph:]") echo "special characters, numbers and letters" ;;
 +
"[:alnum:]") echo "numbers and letters" ;;
 +
  "[:alpha:]") echo "letters only" ;;
 +
"[:digit:]") echo "numbers only" ;;
 +
    esac
 +
echo "Password:"
 +
cat /dev/urandom | tr -dc $CHARS | head -c $LENGTH
 +
echo
 +
echo
 +
  }
 +
 +
 +
_helptext_()
 +
{
 +
    echo
 +
    echo "\"pwgen.sh\" generate a random password."
 +
    echo "usage: pwgen.sh {[LENGTH] [CHARS]} {-h} {-r}"
 +
    echo
 +
    echo "LENGTH Number of characters; default is 20"
 +
    echo "CHARS 0 = special characters, numbers and letters (default)"
 +
    echo " 1 = numbers and letters"
 +
    echo " 2 = letters only"
 +
    echo " 3 = numbers only"
 +
    echo "-h Show this text"
 +
    echo "-r Randomize the \"LENGTH\" and \"CHARS\" options"
 +
    echo
 +
    echo "If one introduces \"pwgen.sh\" from without \"LENGTH\" and \"CHARS\" options, then the default values are used."
 +
    echo "The default values use a length of 20 characters and use 'special characters, numbers and letters'"
 +
    echo "In random mode (-r option) is the max password length 1000 characters."
 +
    echo
 +
    echo "Examples:"
 +
    echo
 +
    echo "\"pwgen.sh\" OR \"pwgen.sh 20\" OR \"pwgen.sh 20 0\""
 +
    echo "  length: 20 characters"
 +
    echo "  charset: special characters, numbers and letters"
 +
    echo "  example: "`cat /dev/urandom | tr -dc [:graph:] | head -c 20`
 +
    echo
 +
    echo "pwgen.sh 8 1"
 +
    echo "  length: 8 characters"
 +
    echo "  charset: numbers and letters"
 +
    echo "  example: "`cat /dev/urandom | tr -dc [:alnum:] | head -c 8`
 +
    echo
 +
    echo "pwgen.sh 25 2"
 +
    echo "  length: 25 characters"
 +
    echo "  charset: letters only"
 +
    echo "  example: "`cat /dev/urandom | tr -dc [:alpha:] | head -c 25`
 +
    echo
 +
    echo "pwgen.sh 4 3"
 +
    echo "  length: 4 characters"
 +
    echo "  charset: numbers only"
 +
    echo "  example: "`cat /dev/urandom | tr -dc [:digit:] | head -c 4`
 +
    echo
 +
    exit 0
 +
}
 +
 +
 +
_invalid_()
 +
{
 +
    if [ "$1" = "length" ]; then
 +
  echo
 +
        echo "Invalid value for parameter \"LENGTH\". For more information use \"pwgen.sh -h\""
 +
echo
 +
    elif [ "$1" = "chars" ]; then
 +
echo
 +
        echo "Invalid value for parameter \"CHARS\". For more information use \"pwgen.sh -h\""
 +
  echo
 +
    fi
 +
    exit 1
 +
  }
 +
 
   
 
   
 +
_random_()
 +
{
 +
    LENGTH=$((RANDOM % 999 +1))
 +
    case `echo $((RANDOM % 2 +1))` in
 +
0) CHARS="[:graph:]" ;;
 +
1) CHARS="[:alnum:]" ;;
 +
2) CHARS="[:alpha:]" ;;
 +
3) CHARS="[:digit:]" ;;
 +
    esac
 +
    _output_
 +
    exit 0
 +
}
 
   
 
   
if [ "$2" = "" ]; then
 
CHARS="[:graph:]"
 
fi
 
 
   
 
   
  if [ "$2" = "1" ]; then
+
  <Nowiki>if [[ `echo "$1" | grep -E ^[[:digit:]]+$` ]]; then</Nowiki>
  CHARS="[:alnum:]"
+
    LENGTH=$1
 +
else
 +
    case $1 in
 +
  "") LENGTH=20 ;;
 +
-h) _helptext_ ;;
 +
-r) _random_ ;;
 +
*) _invalid_ length ;;
 +
    esac
 
  fi
 
  fi
 
   
 
   
if [ "$2" = "2" ]; then
 
CHARS="[:alpha:]"
 
fi
 
 
   
 
   
 +
case $2 in
 +
    "") CHARS="[:graph:]" ;;
 +
    0) CHARS="[:graph:]" ;;
 +
    1) CHARS="[:alnum:]" ;;
 +
    2) CHARS="[:alpha:]" ;;
 +
    3) CHARS="[:digit:]" ;;
 +
    *) _invalid_ chars ;;
 +
esac
 
   
 
   
  cat /dev/urandom | tr -dc $CHARS | head -c $LENGTH
+
  _output_
echo
 
  
 
[[Kategorie:Scripte]]
 
[[Kategorie:Scripte]]

Aktuelle Version vom 4. März 2014, 12:59 Uhr

Ein "einfacher" Passwortgenerator

#!/bin/bash

# Generate a random password
#
# $1 number of characters; defaults to 20
#
# $2 charset
# 0 = special characters, numbers and letters (default)
# 1 = numbers and letters
# 2 = letters only
# 3 = numbers only
#
#
# usage: pwgen.sh <LENGTH> <CHARS>
#
# examples:
#
# length = 20, special characters, numbers and letters
# pwgen.sh
#
# length = 10, special characters, numbers and letters
# pwgen.sh 10
#
# length = 8, numbers and letters
# pwgen.sh 8 1
#
# length = 25, letters only
# pwgen.sh 25 2


_output_()
{
    echo
    echo "Length:		$LENGTH chars"
    echo -n "Charset:	"
    case "$CHARS" in
	"[:graph:]") echo "special characters, numbers and letters" ;;
	"[:alnum:]") echo "numbers and letters" ;;
	"[:alpha:]") echo "letters only" ;;
	"[:digit:]") echo "numbers only" ;;
    esac
echo "Password:"
cat /dev/urandom | tr -dc $CHARS | head -c $LENGTH
echo
echo
}


_helptext_()
{
    echo
    echo "\"pwgen.sh\" generate a random password."
    echo "usage: pwgen.sh {[LENGTH] [CHARS]} {-h} {-r}"
    echo
    echo "LENGTH		Number of characters; default is 20"
    echo "CHARS		0 = special characters, numbers and letters (default)"
    echo "		1 = numbers and letters"
    echo "		2 = letters only"
    echo "		3 = numbers only"
    echo "-h		Show this text"
    echo "-r		Randomize the \"LENGTH\" and \"CHARS\" options"
    echo
    echo "If one introduces \"pwgen.sh\" from without \"LENGTH\" and \"CHARS\" options, then the default values are used."
    echo "The default values use a length of 20 characters and use 'special characters, numbers and letters'"
    echo "In random mode (-r option) is the max password length 1000 characters."
    echo
    echo "Examples:"
    echo
    echo "\"pwgen.sh\" OR \"pwgen.sh 20\" OR \"pwgen.sh 20 0\""
    echo "   length:	20 characters"
    echo "   charset:	special characters, numbers and letters"
    echo "   example:	"`cat /dev/urandom | tr -dc [:graph:] | head -c 20`
    echo
    echo "pwgen.sh 8 1"
    echo "   length:	8 characters"
    echo "   charset:	numbers and letters"
    echo "   example:	"`cat /dev/urandom | tr -dc [:alnum:] | head -c 8`
    echo
    echo "pwgen.sh 25 2"
    echo "   length:	25 characters"
    echo "   charset:	letters only"
    echo "   example:	"`cat /dev/urandom | tr -dc [:alpha:] | head -c 25`
    echo
    echo "pwgen.sh 4 3"
    echo "   length:	4 characters"
    echo "   charset:	numbers only"
    echo "   example:	"`cat /dev/urandom | tr -dc [:digit:] | head -c 4`
    echo
    exit 0
}


_invalid_()
{
    if [ "$1" = "length" ]; then
	echo
        echo "Invalid value for parameter \"LENGTH\". For more information use \"pwgen.sh -h\""
	echo
    elif [ "$1" = "chars" ]; then
	echo
        echo "Invalid value for parameter \"CHARS\". For more information use \"pwgen.sh -h\""
	echo
    fi
    exit 1
}


_random_()
{
    LENGTH=$((RANDOM % 999 +1))
    case `echo $((RANDOM % 2 +1))` in
	0) CHARS="[:graph:]" ;;
	1) CHARS="[:alnum:]" ;;
	2) CHARS="[:alpha:]" ;;
	3) CHARS="[:digit:]" ;;
    esac
    _output_
    exit 0
}


if [[ `echo "$1" | grep -E ^[[:digit:]]+$` ]]; then
    LENGTH=$1
else
    case $1 in
	"") LENGTH=20 ;;
	-h) _helptext_ ;;
	-r) _random_ ;;
	*) _invalid_ length ;;
    esac
fi


case $2 in
    "") CHARS="[:graph:]" ;;
    0) CHARS="[:graph:]" ;;
    1) CHARS="[:alnum:]" ;;
    2) CHARS="[:alpha:]" ;;
    3) CHARS="[:digit:]" ;;
    *) _invalid_ chars ;;
esac

_output_