163 lines
5.1 KiB
JavaScript
163 lines
5.1 KiB
JavaScript
// Password strength meter
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// This jQuery plugin is written by firas kassem [2007.04.05]
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// Firas Kassem phiras.wordpress.com || phiras at gmail {dot} com
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// for more information : http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
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var shortPass = 'Too short'
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var badPass = 'Bad'
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var goodPass = 'Good'
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var strongPass = 'Strong'
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function passwordStrength(password,username)
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{
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score = 0
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//password < 4
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if (password.length < 4 ) { return shortPass }
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//password == username
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if (password.toLowerCase()==username.toLowerCase()) return badPass
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//password length
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score += password.length * 4
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score += ( checkRepetition(1,password).length - password.length ) * 1
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score += ( checkRepetition(2,password).length - password.length ) * 1
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score += ( checkRepetition(3,password).length - password.length ) * 1
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score += ( checkRepetition(4,password).length - password.length ) * 1
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//password has 3 numbers
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if (password.match(/(.*[0-9].*[0-9].*[0-9])/)) score += 5
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//password has 2 sybols
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if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) score += 5
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//password has Upper and Lower chars
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if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)) score += 10
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//password has number and chars
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if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)) score += 15
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//
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//password has number and symbol
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if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)) score += 15
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//password has char and symbol
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if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)) score += 15
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//password is just a nubers or chars
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if (password.match(/^\w+$/) || password.match(/^\d+$/) ) score -= 10
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//verifing 0 < score < 100
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if ( score < 0 ) score = 0
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if ( score > 100 ) score = 100
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if (score < 34 ) return badPass
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if (score < 68 ) return goodPass
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return strongPass
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}
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// checkRepetition(1,'aaaaaaabcbc') = 'abcbc'
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// checkRepetition(2,'aaaaaaabcbc') = 'aabc'
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// checkRepetition(2,'aaaaaaabcdbcd') = 'aabcd'
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function checkRepetition(pLen,str) {
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res = ""
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for ( i=0; i<str.length ; i++ ) {
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repeated=true
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for (j=0;j < pLen && (j+i+pLen) < str.length;j++)
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repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen))
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if (j<pLen) repeated=false
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if (repeated) {
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i+=pLen-1
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repeated=false
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}
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else {
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res+=str.charAt(i)
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}
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}
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return res
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}
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// Password strength meter
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// This jQuery plugin is written by firas kassem [2007.04.05]
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// Firas Kassem phiras.wordpress.com || phiras at gmail {dot} com
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// for more information : http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
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var shortPass = 'Too short'
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var badPass = 'Bad'
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var goodPass = 'Good'
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var strongPass = 'Strong'
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function passwordStrength(password,username)
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{
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score = 0
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//password < 4
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if (password.length < 4 ) { return shortPass }
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//password == username
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if (password.toLowerCase()==username.toLowerCase()) return badPass
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//password length
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score += password.length * 4
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score += ( checkRepetition(1,password).length - password.length ) * 1
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score += ( checkRepetition(2,password).length - password.length ) * 1
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score += ( checkRepetition(3,password).length - password.length ) * 1
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score += ( checkRepetition(4,password).length - password.length ) * 1
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//password has 3 numbers
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if (password.match(/(.*[0-9].*[0-9].*[0-9])/)) score += 5
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//password has 2 sybols
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if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) score += 5
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//password has Upper and Lower chars
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if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)) score += 10
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//password has number and chars
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if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)) score += 15
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//
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//password has number and symbol
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if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)) score += 15
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//password has char and symbol
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if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)) score += 15
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//password is just a nubers or chars
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if (password.match(/^\w+$/) || password.match(/^\d+$/) ) score -= 10
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//verifing 0 < score < 100
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if ( score < 0 ) score = 0
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if ( score > 100 ) score = 100
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if (score < 34 ) return badPass
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if (score < 68 ) return goodPass
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return strongPass
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}
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// checkRepetition(1,'aaaaaaabcbc') = 'abcbc'
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// checkRepetition(2,'aaaaaaabcbc') = 'aabc'
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// checkRepetition(2,'aaaaaaabcdbcd') = 'aabcd'
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function checkRepetition(pLen,str) {
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res = ""
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for ( i=0; i<str.length ; i++ ) {
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repeated=true
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for (j=0;j < pLen && (j+i+pLen) < str.length;j++)
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repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen))
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if (j<pLen) repeated=false
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if (repeated) {
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i+=pLen-1
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repeated=false
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}
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else {
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res+=str.charAt(i)
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}
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}
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return res
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}
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