// SimpleHashcatRules applies the basic hashcat rules based on delete, insert, replace
func SimpleHashcatRules(word []rune, password []rune, operations []EditOp) []string {
if string(word) == string(password) {
return []string{":"}
}
temp := make([]rune, len(word))
copy(temp, word)
r := []string{}
for _, op := range operations {
if op.Op == "insert" {
r = append(r, fmt.Sprintf("i%d%c", op.P, password[op.P]))
temp = rules.InsertAtN(temp, op.P, password[op.P])
} else if op.Op == "delete" {
r = append(r, fmt.Sprintf("D%d", op.P))
temp = rules.DeleteN(temp, op.P)
} else if op.Op == "replace" {
r = append(r, fmt.Sprintf("o%d%c", op.P, password[op.P]))
temp = rules.OverwriteAtN(temp, op.P, password[op.P])
}
}
if string(temp) == string(password) {
return r
}
return nil
}
// RuleWorks tests if a rule results in the correct managled word
func RuleWorks(word []rune, password []rune, operations []EditOp) bool {
temp := make([]rune, len(word))
copy(temp, word)
for _, op := range operations {
if op.Op == "insert" {
rules.InsertAtN(temp, op.P, password[op.P])
} else if op.Op == "delete" {
rules.DeleteN(temp, op.P)
} else if op.Op == "replace" {
rules.OverwriteAtN(temp, op.P, password[op.P])
}
}
if string(temp) == string(password) {
return true
}
return false
}
// AdvancedHashcatRules applies all hashcat rules to a word
func AdvancedHashcatRules(passwordString, wordString string, perations []EditOp) []string {
// TODO
// can we do this earlier not in this function to save a fucntion call
if passwordString == wordString {
return []string{":"}
}
password := []rune(passwordString)
word := []rune(wordString)
needNewName := []string{}
// this holds the current mangled as rules are applied
wordRules := make([]rune, 0, len(word))
wordRules = append(wordRules, []rune(word)[:]...)
var passwordLower int
var passwordUpper int
for _, r := range password {
if unicode.IsLower(r) {
passwordLower++
} else if unicode.IsUpper(r) {
passwordUpper++
}
}
for i, op := range perations {
if op.Op == "insert" {
needNewName = append(needNewName, fmt.Sprintf("i%c%c", rules.ToAlpha(op.P), password[op.P]))
wordRules = rules.InsertAtN(wordRules, op.P, password[op.P])
} else if op.Op == "delete" {
needNewName = append(needNewName, fmt.Sprintf("D%c", rules.ToAlpha(op.P)))
wordRules = rules.DeleteN(wordRules, op.P)
} else if op.Op == "replace" {
// rule was made obsolete by prior global replacement
// test to see if word is greater than password to avoid index error
if len(wordRules) >= len(password) && wordRules[op.P] == password[op.P] {
if *debug {
fmt.Println("obsolete rule")
}
// Swapping rules
} else if op.P < len(password)-1 && op.P < len(word)-1 &&
word[op.P] == password[op.P+1] &&
word[op.P+1] == password[op.P] {
if op.P == 0 && RuleWorks(word, password, perations[i+1:]) {
needNewName = append(needNewName, "k")
wordRules = rules.SwapFront(wordRules)
} else if op.P == len(wordRules)-2 && RuleWorks(rules.SwapBack(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "K")
wordRules = rules.SwapBack(wordRules)
} else if RuleWorks(rules.SwapAtN(wordRules, op.P, op.P+1), password, perations[i+1:]) {
// Swap any two characters (only adjacent swapping is supported)
needNewName = append(needNewName, fmt.Sprintf("*%c%c", op.P, rules.ToAlpha(op.P+1)))
wordRules = rules.SwapAtN(wordRules, op.P, op.P+1)
} else {
needNewName = append(needNewName, fmt.Sprintf("o%c%c", rules.ToAlpha(op.P), password[op.P]))
wordRules = rules.OverwriteAtN(wordRules, op.P, password[op.P])
}
// Case Toggle: Uppercased a letter
} else if unicode.IsLower(wordRules[op.P]) && unicode.ToUpper(wordRules[op.P]) == password[op.P] {
// Toggle the case of all characters in word (mixed cases)
if passwordUpper > 0 && passwordLower > 0 && RuleWorks(rules.ToggleCase(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "t")
wordRules = rules.ToggleCase(wordRules)
// Capitalize all letters
} else if RuleWorks(rules.Uppercase(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "u")
wordRules = rules.Uppercase(wordRules)
// Capitalize the first letter
} else if op.P == 0 && RuleWorks(rules.Capitalize(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "c")
wordRules = rules.Capitalize(wordRules)
// Toggle the case of characters at position N
} else {
needNewName = append(needNewName, fmt.Sprintf("T%c", rules.ToAlpha(op.P)))
wordRules = rules.ToggleAt(wordRules, op.P)
}
// Case Toggle Lowercased a letter
} else if unicode.IsUpper(wordRules[op.P]) && unicode.ToLower(wordRules[op.P]) == password[op.P] {
// Toggle the case of all characters in word (mixed cases)
if passwordUpper > 0 && passwordLower > 0 && RuleWorks(rules.ToggleCase(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "t")
wordRules = rules.ToggleCase(wordRules)
// Lowercase all letters
} else if RuleWorks(rules.Lowercase(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "l")
wordRules = rules.Lowercase(wordRules)
// Lowercase the first found character, uppercase the rest
} else if op.P == 0 && RuleWorks(rules.InvertCapitalize(wordRules), password, perations[i+1:]) {
needNewName = append(needNewName, "C")
wordRules = rules.InvertCapitalize(wordRules)
// Toggle the case of characters at position N
} else {
needNewName = append(needNewName, fmt.Sprintf("T%c", rules.ToAlpha(op.P)))
wordRules = rules.ToggleAt(wordRules, op.P)
}
// Special case substitution of 'all' instances (1337 $p34k)
} else if unicode.IsLetter(wordRules[op.P]) && !unicode.IsLetter(password[op.P]) &&
RuleWorks(rules.Replace(wordRules[0:], wordRules[op.P], password[op.P]), password, perations[i+1:]) {
needNewName = append(needNewName, fmt.Sprintf("s%c%c", wordRules[op.P], password[op.P]))
wordRules = rules.Replace(wordRules, wordRules[op.P], password[op.P])
// Replace next character with current
} else if op.P < len(password)-1 && op.P < len(wordRules)-1 &&
password[op.P] == password[op.P+1] && password[op.P] == wordRules[op.P+1] {
needNewName = append(needNewName, fmt.Sprintf(".%c", rules.ToAlpha(op.P)))
wordRules = rules.ReplaceNPlus(wordRules, op.P)
// Replace previous character with current
} else if op.P > 0 && op.Word > 0 && password[op.P] == password[op.P-1] && password[op.P] == wordRules[op.P-1] {
needNewName = append(needNewName, fmt.Sprintf(",%c", rules.ToAlpha(op.P)))
wordRules = rules.ReplaceNMinus(wordRules, op.P)
// ASCII increment
} else if wordRules[op.P]+1 == password[op.P] {
needNewName = append(needNewName, fmt.Sprintf("+%c", rules.ToAlpha(op.P)))
wordRules = rules.ASCIIIncrementPlus(wordRules, op.P)
// ASCII decrement
} else if wordRules[op.P]-1 == password[op.P] {
needNewName = append(needNewName, fmt.Sprintf("-%c", rules.ToAlpha(op.P)))
wordRules = rules.ASCIIIncrementMinus(wordRules, op.P)
// SHIFT left
} else if wordRules[op.P]<<1 == password[op.P] {
needNewName = append(needNewName, fmt.Sprintf("L%c", rules.ToAlpha(op.P)))
wordRules = rules.BitwiseShiftLeft(wordRules, op.P)
// SHIFT right
} else if wordRules[op.P]>>1 == password[op.P] {
needNewName = append(needNewName, fmt.Sprintf("R%c", rules.ToAlpha(op.P)))
wordRules = rules.BitwiseShiftRight(wordRules, op.P)
// Position based replacements.
} else {
needNewName = append(needNewName, fmt.Sprintf("o%c%c", rules.ToAlpha(op.P), password[op.P]))
wordRules = rules.OverwriteAtN(wordRules, op.P, password[op.P])
}
}
}
// out of for loop
// these next things convert rules to append $ and prepend rules
// TODO
// possibility to have either what the rule is now or
// the rule swapped with these replacements
// Prefix rules
lastPrefix := 0
var prefixRules []string
for i, hashcatRule := range needNewName {
if hashcatRule[0] == 'i' && rules.ToNumByte(hashcatRule[1]) == lastPrefix {
prefixRules = append(prefixRules, fmt.Sprintf("^%c", hashcatRule[2]))
lastPrefix++
needNewName[i] = fmt.Sprintf("^%c", hashcatRule[2])
} else {
// TODO
// dont know about breaking early here
break
}
}
// Appendix rules
lastAppendix := len(password) - 1
var appendixRules []string
for i, hashcatRule := range needNewName {
if hashcatRule[0] == 'i' && rules.ToNumByte(hashcatRule[1]) == lastAppendix {
appendixRules = append(appendixRules, fmt.Sprintf("$%c", hashcatRule[2]))
lastAppendix--
needNewName[i] = fmt.Sprintf("$%c", hashcatRule[2])
} else {
break
}
}
// Truncate left rules
lastPrecut := 0
for i, hashcatRule := range needNewName {
if hashcatRule[0] == 'D' && rules.ToNumByte(hashcatRule[1]) == lastPrecut {
needNewName[i] = "["
} else {
break
}
}
// Truncate right rules
lastPostcut := len(password)
for i, hashcatRule := range needNewName {
if hashcatRule[0] == 'D' && rules.ToNumByte(hashcatRule[1]) >= lastPostcut {
needNewName[i] = "]"
} else {
break
}
}
/*
// naive implementation of OMN
// will only work if the first rule is a delete
overwrite := 0
for i, hashcatRule := range needNewName {
if hashcatRule[0] == 'D' && i < len(password)-1 && needNewName[i+1] == 'D' {
overwrite++
needNewName[i] = ""
} else {
break
}
}
if overwrite > 0 {
var temp []string
temp = append(temp, fmt.Sprintf("O%c%c", rules.ToAlpha(0), rules.ToAlpha(overwrite)))
temp = append(temp, needNewName[:]...)
needNewName = temp
}
*/
// Check if rules result in the correct password
if string(wordRules) == passwordString {
return needNewName
}
log.Printf("advanced processing failed: P: %s, M: %s, O: %s, %v\n", passwordString, string(wordRules), wordString, needNewName)
return nil
}
