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package matching
import (
"strings"
"github.com/nbutton23/zxcvbn-go/entropy"
"github.com/nbutton23/zxcvbn-go/match"
)
const REPEAT_MATCHER_NAME = "REPEAT"
func FilterRepeatMatcher(m match.Matcher) bool {
return m.ID == REPEAT_MATCHER_NAME
}
func repeatMatch(password string) []match.Match {
var matches []match.Match
//Loop through password. if current == prev currentStreak++ else if currentStreak > 2 {buildMatch; currentStreak = 1} prev = current
var current, prev string
currentStreak := 1
var i int
var char rune
for i, char = range password {
current = string(char)
if i == 0 {
prev = current
continue
}
if strings.ToLower(current) == strings.ToLower(prev) {
currentStreak++
} else if currentStreak > 2 {
iPos := i - currentStreak
jPos := i - 1
matchRepeat := match.Match{
Pattern: "repeat",
I: iPos,
J: jPos,
Token: password[iPos : jPos+1],
DictionaryName: prev}
matchRepeat.Entropy = entropy.RepeatEntropy(matchRepeat)
matches = append(matches, matchRepeat)
currentStreak = 1
} else {
currentStreak = 1
}
prev = current
}
if currentStreak > 2 {
iPos := i - currentStreak + 1
jPos := i
matchRepeat := match.Match{
Pattern: "repeat",
I: iPos,
J: jPos,
Token: password[iPos : jPos+1],
DictionaryName: prev}
matchRepeat.Entropy = entropy.RepeatEntropy(matchRepeat)
matches = append(matches, matchRepeat)
}
return matches
}
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