ricochet-go/vendor/github.com/nbutton23/zxcvbn-go/matching/dateMatchers.go

190 lines
5.5 KiB
Go

package matching
import (
"github.com/nbutton23/zxcvbn-go/entropy"
"github.com/nbutton23/zxcvbn-go/match"
"regexp"
"strconv"
"strings"
)
func checkDate(day, month, year int64) (bool, int64, int64, int64) {
if (12 <= month && month <= 31) && day <= 12 {
day, month = month, day
}
if day > 31 || month > 12 {
return false, 0, 0, 0
}
if !((1900 <= year && year <= 2019) || (0 <= year && year <= 99)) {
return false, 0, 0, 0
}
return true, day, month, year
}
func dateSepMatcher(password string) []match.Match {
dateMatches := dateSepMatchHelper(password)
var matches []match.Match
for _, dateMatch := range dateMatches {
match := match.Match{
I: dateMatch.I,
J: dateMatch.J,
Entropy: entropy.DateEntropy(dateMatch),
DictionaryName: "date_match",
Token: dateMatch.Token,
}
matches = append(matches, match)
}
return matches
}
func dateSepMatchHelper(password string) []match.DateMatch {
var matches []match.DateMatch
matcher := regexp.MustCompile(DATE_RX_YEAR_SUFFIX)
for _, v := range matcher.FindAllString(password, len(password)) {
splitV := matcher.FindAllStringSubmatch(v, len(v))
i := strings.Index(password, v)
j := i + len(v)
day, _ := strconv.ParseInt(splitV[0][4], 10, 16)
month, _ := strconv.ParseInt(splitV[0][2], 10, 16)
year, _ := strconv.ParseInt(splitV[0][6], 10, 16)
match := match.DateMatch{Day: day, Month: month, Year: year, Separator: splitV[0][5], I: i, J: j, Token: password[i:j]}
matches = append(matches, match)
}
matcher = regexp.MustCompile(DATE_RX_YEAR_PREFIX)
for _, v := range matcher.FindAllString(password, len(password)) {
splitV := matcher.FindAllStringSubmatch(v, len(v))
i := strings.Index(password, v)
j := i + len(v)
day, _ := strconv.ParseInt(splitV[0][4], 10, 16)
month, _ := strconv.ParseInt(splitV[0][6], 10, 16)
year, _ := strconv.ParseInt(splitV[0][2], 10, 16)
match := match.DateMatch{Day: day, Month: month, Year: year, Separator: splitV[0][5], I: i, J: j, Token: password[i:j]}
matches = append(matches, match)
}
var out []match.DateMatch
for _, match := range matches {
if valid, day, month, year := checkDate(match.Day, match.Month, match.Year); valid {
match.Pattern = "date"
match.Day = day
match.Month = month
match.Year = year
out = append(out, match)
}
}
return out
}
type DateMatchCandidate struct {
DayMonth string
Year string
I, J int
}
type DateMatchCandidateTwo struct {
Day string
Month string
Year string
I, J int
}
func dateWithoutSepMatch(password string) []match.Match {
dateMatches := dateWithoutSepMatchHelper(password)
var matches []match.Match
for _, dateMatch := range dateMatches {
match := match.Match{
I: dateMatch.I,
J: dateMatch.J,
Entropy: entropy.DateEntropy(dateMatch),
DictionaryName: "date_match",
Token: dateMatch.Token,
}
matches = append(matches, match)
}
return matches
}
//TODO Has issues with 6 digit dates
func dateWithoutSepMatchHelper(password string) (matches []match.DateMatch) {
matcher := regexp.MustCompile(DATE_WITHOUT_SEP_MATCH)
for _, v := range matcher.FindAllString(password, len(password)) {
i := strings.Index(password, v)
j := i + len(v)
length := len(v)
lastIndex := length - 1
var candidatesRoundOne []DateMatchCandidate
if length <= 6 {
//2-digit year prefix
candidatesRoundOne = append(candidatesRoundOne, buildDateMatchCandidate(v[2:], v[0:2], i, j))
//2-digityear suffix
candidatesRoundOne = append(candidatesRoundOne, buildDateMatchCandidate(v[0:lastIndex-2], v[lastIndex-2:], i, j))
}
if length >= 6 {
//4-digit year prefix
candidatesRoundOne = append(candidatesRoundOne, buildDateMatchCandidate(v[4:], v[0:4], i, j))
//4-digit year sufix
candidatesRoundOne = append(candidatesRoundOne, buildDateMatchCandidate(v[0:lastIndex-3], v[lastIndex-3:], i, j))
}
var candidatesRoundTwo []DateMatchCandidateTwo
for _, c := range candidatesRoundOne {
if len(c.DayMonth) == 2 {
candidatesRoundTwo = append(candidatesRoundTwo, buildDateMatchCandidateTwo(c.DayMonth[0:0], c.DayMonth[1:1], c.Year, c.I, c.J))
} else if len(c.DayMonth) == 3 {
candidatesRoundTwo = append(candidatesRoundTwo, buildDateMatchCandidateTwo(c.DayMonth[0:2], c.DayMonth[2:2], c.Year, c.I, c.J))
candidatesRoundTwo = append(candidatesRoundTwo, buildDateMatchCandidateTwo(c.DayMonth[0:0], c.DayMonth[1:3], c.Year, c.I, c.J))
} else if len(c.DayMonth) == 4 {
candidatesRoundTwo = append(candidatesRoundTwo, buildDateMatchCandidateTwo(c.DayMonth[0:2], c.DayMonth[2:4], c.Year, c.I, c.J))
}
}
for _, candidate := range candidatesRoundTwo {
intDay, err := strconv.ParseInt(candidate.Day, 10, 16)
if err != nil {
continue
}
intMonth, err := strconv.ParseInt(candidate.Month, 10, 16)
if err != nil {
continue
}
intYear, err := strconv.ParseInt(candidate.Year, 10, 16)
if err != nil {
continue
}
if ok, _, _, _ := checkDate(intDay, intMonth, intYear); ok {
matches = append(matches, match.DateMatch{Token: password, Pattern: "date", Day: intDay, Month: intMonth, Year: intYear, I: i, J: j})
}
}
}
return matches
}
func buildDateMatchCandidate(dayMonth, year string, i, j int) DateMatchCandidate {
return DateMatchCandidate{DayMonth: dayMonth, Year: year, I: i, J: j}
}
func buildDateMatchCandidateTwo(day, month string, year string, i, j int) DateMatchCandidateTwo {
return DateMatchCandidateTwo{Day: day, Month: month, Year: year, I: i, J: j}
}