Parallel brute force: Difference between revisions
added elixir solution
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{{
;Task:
Line 9:
3. 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
Your program should naively iterate through all possible passwords consisting only of five lower-case ASCII English letters. It should use concurrent or parallel processing, if your language supports that feature. You may calculate
Related task: [[SHA-256]]
=={{header|Ada}}==
{{libheader|CryptAda}}
<syntaxhighlight lang="ada">with Ada.Text_IO;
with CryptAda.Digests.Message_Digests.SHA_256;
with CryptAda.Digests.Hashes;
with CryptAda.Pragmatics;
procedure Brute_Force is
use CryptAda.Digests.Message_Digests;
use CryptAda.Digests.Hashes;
use CryptAda.Digests;
use CryptAda.Pragmatics;
Wanted_Sums : constant array (1 .. 3) of String (1 .. 64) :=
(1 => "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
2 => "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
3 => "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f");
Wanted_Hash : constant array (1 .. 3) of Hashes.Hash :=
(1 => Hashes.To_Hash (Wanted_Sums (1)),
2 => Hashes.To_Hash (Wanted_Sums (2)),
3 => Hashes.To_Hash (Wanted_Sums (3)));
subtype Ciffer is Byte range Character'Pos ('a') .. Character'Pos ('z');
subtype Code is Byte_Array (1 .. 5);
task type Worker (First : Byte) is
end Worker;
procedure Compare (Hash : in Hashes.Hash; Bytes : in Code) is
begin
for I in Wanted_Hash'Range loop
if Hash = Wanted_Hash (I) then
Ada.Text_IO.Put (Wanted_Sums (I) & " ");
for C of Bytes loop
Ada.Text_IO.Put (Character'Val (C));
end loop;
Ada.Text_IO.New_Line;
end if;
end loop;
end Compare;
task body Worker is
Handle : constant Message_Digest_Handle := SHA_256.Get_Message_Digest_Handle;
Digest : constant Message_Digest_Ptr := Get_Message_Digest_Ptr (Handle);
Bytes : Code;
Hash : Hashes.Hash;
begin
Bytes (Bytes'First) := First;
for B2 in Ciffer'Range loop
for B3 in Ciffer'Range loop
for B4 in Ciffer'Range loop
Bytes (2 .. 4) := B2 & B3 & B4;
for B5 in Ciffer'Range loop
Bytes (5) := B5;
Digest_Start (Digest);
Digest_Update (Digest, Bytes);
Digest_End (Digest, Hash);
Compare (Hash, Bytes);
end loop;
end loop;
end loop;
end loop;
end Worker;
type Worker_Access is access Worker;
Work : Worker_Access;
pragma Unreferenced (Work);
begin
for C in Ciffer'Range loop
Work := new Worker (First => C);
end loop;
end Brute_Force;</syntaxhighlight>
=={{header|BaCon}}==
<syntaxhighlight lang="qbasic">PRAGMA INCLUDE <openssl/sha.h>
PRAGMA LDFLAGS -lcrypto
OPTION MEMTYPE unsigned char
LOCAL buffer[32], passwd[5] TYPE unsigned char
LOCAL result TYPE unsigned char*
LOCAL a,b,c,d,e TYPE NUMBER
DATA "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b", "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f", "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
WHILE TRUE
READ secret$
IF NOT(LEN(secret$)) THEN BREAK
FOR i = 0 TO 31
buffer[i] = DEC(MID$(secret$, i*2+1, 2))
NEXT
FOR a = 97 TO 122
FOR b = 97 TO 122
FOR c = 97 TO 122
FOR d = 97 TO 122
FOR e = 97 TO 122
passwd[0] = a
passwd[1] = b
passwd[2] = c
passwd[3] = d
passwd[4] = e
result = SHA256(passwd, 5, 0)
FOR i = 0 TO SHA256_DIGEST_LENGTH-1
IF PEEK(result+i) != buffer[i] THEN BREAK
NEXT
IF i = SHA256_DIGEST_LENGTH THEN
PRINT a,b,c,d,e,secret$ FORMAT "%c%c%c%c%c:%s\n"
BREAK 5
END IF
NEXT
NEXT
NEXT
NEXT
NEXT
WEND</syntaxhighlight>
{{out}}
<pre>
apple:3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm:74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx:1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|C}}==
{{trans|C#}}
<syntaxhighlight lang="c">// $ gcc -o parabrutfor parabrutfor.c -fopenmp -lssl -lcrypto
// $ export OMP_NUM_THREADS=4
// $ ./parabrutfor
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <omp.h>
#include <openssl/sha.h>
typedef unsigned char byte;
int matches(byte *a, byte* b) {
for (int i = 0; i < 32; i++)
if (a[i] != b[i])
return 0;
return 1;
}
byte* StringHashToByteArray(const char* s) {
byte* hash = (byte*) malloc(32);
char two[3];
two[2] = 0;
for (int i = 0; i < 32; i++) {
two[0] = s[i * 2];
two[1] = s[i * 2 + 1];
hash[i] = (byte)strtol(two, 0, 16);
}
return hash;
}
void printResult(byte* password, byte* hash) {
char sPass[6];
memcpy(sPass, password, 5);
sPass[5] = 0;
printf("%s => ", sPass);
for (int i = 0; i < SHA256_DIGEST_LENGTH; i++)
printf("%02x", hash[i]);
printf("\n");
}
int main(int argc, char **argv)
{
#pragma omp parallel
{
#pragma omp for
for (int a = 0; a < 26; a++)
{
byte password[5] = { 97 + a };
byte* one = StringHashToByteArray("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad");
byte* two = StringHashToByteArray("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b");
byte* three = StringHashToByteArray("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f");
for (password[1] = 97; password[1] < 123; password[1]++)
for (password[2] = 97; password[2] < 123; password[2]++)
for (password[3] = 97; password[3] < 123; password[3]++)
for (password[4] = 97; password[4] < 123; password[4]++) {
byte *hash = SHA256(password, 5, 0);
if (matches(one, hash) || matches(two, hash) || matches(three, hash))
printResult(password, hash);
}
free(one);
free(two);
free(three);
}
}
return 0;
}</syntaxhighlight>
{{out}}
<pre>apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|C sharp|C#}}==
<
using System.Linq;
using System.Text;
using System.Threading.Tasks;
Line 25 ⟶ 231:
static void Main(string[] args)
{
Parallel.For(0, 26, a => {
byte[] password = new byte[5];
byte[] hash;
byte[] one = StringHashToByteArray("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad");
byte[] two = StringHashToByteArray("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b");
byte[] three = StringHashToByteArray("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f");
var sha = System.Security.Cryptography.SHA256.Create();
for (password[1] = 97; password[1] < 123; password[1]++)
for (password[2] = 97; password[2] <
for (password[3] = 97; password[3] < 123; password[3]++)
for (password[4] = 97; password[4] < 123; password[4]++)
{
hash = sha.ComputeHash(password);
if (matches(one, hash) || matches(two, hash) || matches(three, hash))
Console.WriteLine(Encoding.ASCII.GetString(password) + " => "
+ BitConverter.ToString(hash).ToLower().Replace("-", ""));
}
});
}
static byte[] StringHashToByteArray(string s)
Line 42 ⟶ 255:
return Enumerable.Range(0, s.Length / 2).Select(i => (byte)Convert.ToInt16(s.Substring(i * 2, 2), 16)).ToArray();
}
static bool matches(byte[] a, byte[] b)
{
}
}</syntaxhighlight>
{{out}}
<pre>apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|C++}}==
{{libheader|OpenSSL}}
<syntaxhighlight lang="cpp">#include <atomic>
#include <cstdio>
#include <cstring>
#include <future>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <openssl/sha.h>
struct sha256 {
unsigned char digest[SHA256_DIGEST_LENGTH];
void compute(const char* str, int len) {
SHA256((const unsigned char*)str, len, digest);
}
bool parse(const std::string& hash) {
if (hash.length() != 2 * SHA256_DIGEST_LENGTH) {
std::cerr << "Invalid SHA-256 hash\n";
return false;
}
const char* p = hash.c_str();
for (int i = 0; i < SHA256_DIGEST_LENGTH; ++i, p += 2) {
unsigned int x;
if (sscanf(p, "%2x", &x) != 1) {
std::cerr << "Cannot parse SHA-256 hash\n";
return false;
}
}
return
}
};
bool operator==(const sha256& a, const sha256& b) {
return memcmp(a.digest, b.digest, SHA256_DIGEST_LENGTH) == 0;
}
bool next_password(std::string& passwd, size_t start) {
size_t len = passwd.length();
for (size_t i = len - 1; i >= start; --i) {
char c = passwd[i];
if (c < 'z') {
++passwd[i];
return true;
}
passwd[i] = 'a';
}
return false;
}
class password_finder {
public:
password_finder(int);
void find_passwords(const std::vector<std::string>&);
private:
int length;
void find_passwords(char);
std::vector<std::string> hashes;
std::vector<sha256> digests;
std::atomic<size_t> count;
};
password_finder::password_finder(int len) : length(len) {}
void password_finder::find_passwords(char ch) {
std::string passwd(length, 'a');
passwd[0] = ch;
sha256 digest;
while (count > 0) {
digest.compute(passwd.c_str(), length);
for (int m = 0; m < hashes.size(); ++m) {
if (digest == digests[m]) {
--count;
std::ostringstream out;
out << "password: " << passwd << ", hash: " << hashes[m]
<< '\n';
std::cout << out.str();
break;
}
}
if (!next_password(passwd, 1))
break;
}
}
void password_finder::find_passwords(const std::vector<std::string>& h) {
hashes = h;
digests.resize(hashes.size());
for (int i = 0; i < hashes.size(); ++i) {
if (!digests[i].parse(hashes[i]))
return;
}
count = hashes.size();
std::vector<std::future<void>> futures;
const int n = 26;
for (int i = 0; i < n; ++i) {
char c = 'a' + i;
futures.push_back(
std::async(std::launch::async, [this, c]() { find_passwords(c); }));
}
}
int main() {
std::vector<std::string> hashes{
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"};
password_finder pf(5);
pf.find_passwords(hashes);
return 0;
}</syntaxhighlight>
{{out}}
Execution time is about 0.7 seconds on my system (3.2 GHz Quad-Core Intel Core i5, macOS 10.15.3).
<pre>
password: mmmmm, hash: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
password: apple, hash: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
password: zyzzx, hash: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|Clojure}}==
{{libheader|clojure.math.combinatorics}}
<syntaxhighlight lang="clojure">(ns rosetta.brute-force
(:require [clojure.math.combinatorics :refer [selections]]) ;; https://github.com/clojure/math.combinatorics
(:import [java.util Arrays]
[java.security MessageDigest]))
;;https://rosettacode.org/wiki/Parallel_Brute_Force
(def targets ;; length = 5
["1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"])
;; HELPER/UTIL fns
;;=================
(defn digest
"Given a byte-array <bs> returns its hash (also a byte-array)."
^bytes [^MessageDigest md ^bytes bs]
(.digest md bs))
(defn char-range
"Helper fn for easily producing character ranges."
[start end]
(map char (range (int start)
(inc (int end)))))
(def low-case-eng-bytes
"Our search-space (all lower case english characters converted to bytes)."
(map byte (char-range \a \z)))
(defn hex->bytes
"Converts a hex string to a byte-array."
^bytes [^String hex]
(let [len (.length hex)
ret (byte-array (/ len 2))]
(run! (fn [i]
(aset ret
(/ i 2)
^byte (unchecked-add-int
(bit-shift-left
(Character/digit (.charAt hex i) 16)
4)
(Character/digit (.charAt hex (inc i)) 16))))
(range 0 len 2))
ret))
(defn bytes->hex
"Converts a byte-array to a hex string."
[^bytes bs]
(.toString
^StringBuilder
(areduce bs idx ret (StringBuilder.)
(doto ret (.append (format "%02x" (aget bs idx)))))))
;; MAIN LOGIC
;;===========
(defn check-candidate
"Checks whether the SHA256 hash of <candidate> (a list of 5 bytes),
matches <target>. If it does, returns that hash as a hex-encoded String.
Otherwise returns nil."
[^bytes target sha256 candidate]
(let [candidate-bytes (byte-array candidate)
^bytes candidate-hash (sha256 candidate-bytes)]
(when (Arrays/equals target candidate-hash)
(let [answer (String. candidate-bytes)]
(println "Answer found for:" (bytes->hex candidate-hash) "=>" answer)
answer))))
(defn sha256-brute-force
"Top level function. Returns a list with the 3 answers."
[space hex-hashes]
(->> hex-hashes
(map hex->bytes) ;; convert the hex strings to bytes
(pmap ;; parallel map the checker-fn
(fn [target-bytes]
(let [message-digest (MessageDigest/getInstance "SHA-256") ;; new digest instance per thread
sha256 (partial digest message-digest)]
(some (partial check-candidate target-bytes sha256)
(selections space 5)))))))
</syntaxhighlight>
{{out}}
<pre>Answer found for: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b => apple
Answer found for: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f => mmmmm
Answer found for: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad => zyzzx</pre>
=={{header|Common Lisp}}==
{{libheader|lparallel}}
{{libheader|ironclad}}
<syntaxhighlight lang="lisp">(defpackage #:parallel-brute-force
(:use #:cl
#:lparallel))
(in-package #:parallel-brute-force)
(defparameter *alphabet* "abcdefghijklmnopqrstuvwxyz")
(defparameter *hash0* "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad")
(defparameter *hash1* "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
(defparameter *hash2* "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
(defparameter *kernel-size* 7)
(defun sha-256 (input)
(ironclad:byte-array-to-hex-string
(ironclad:digest-sequence :sha256 (ironclad:ascii-string-to-byte-array input))))
(defun call-with-5-char-string (fun first-char)
(loop with str = (make-array 5 :element-type 'character :initial-element first-char)
for c1 across *alphabet*
do (setf (char str 1) c1)
(loop for c2 across *alphabet*
do (setf (char str 2) c2)
(loop for c3 across *alphabet*
do (setf (char str 3) c3)
(loop for c4 across *alphabet*
do (setf (char str 4) c4)
(funcall fun (copy-seq str)))))))
(defmacro with-5-char-string ((str first-char) &body body)
`(call-with-5-char-string (lambda (,str) ,@body) ,first-char))
(defun find-passwords-with (first-char)
(let (results)
(with-5-char-string (str first-char)
(let ((hash (sha-256 str)))
(when (or (string= hash *hash0*) (string= hash *hash1*) (string= hash *hash2*))
(push (list str hash) results))))
(nreverse results)))
(defun find-passwords ()
(setf *kernel* (make-kernel *kernel-size*))
(let ((results (unwind-protect
(pmapcan #'find-passwords-with *alphabet*)
(end-kernel))))
(dolist (r results)
(format t "~A: ~A~%" (first r) (second r)))))</syntaxhighlight>
{{out}}
<pre>apple: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|D}}==
There is at least one more method not shown for doing the task in parallel, which uses the std.concurrency module instead.
<syntaxhighlight lang="d">import std.digest.sha;
import std.parallelism;
import std.range;
import std.stdio;
// Find the five lower-case letter strings representing the following sha256 hashes
immutable p1 = cast(ubyte[32]) x"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad";
immutable p2 = cast(ubyte[32]) x"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b";
immutable p3 = cast(ubyte[32]) x"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f";
void main() {
import std.datetime.stopwatch;
auto sw = StopWatch(AutoStart.yes);
// Switch these top loops to toggle between non-parallel and parrallel solutions.
// foreach(char a; 'a'..'z'+1) {
foreach(i, a; taskPool.parallel(iota('a', 'z'+1))) {
char[5] psw;
psw[0] = cast(char) a;
foreach(char b; 'a'..'z'+1) {
psw[1] = b;
foreach(char c; 'a'..'z'+1) {
psw[2] = c;
foreach(char d; 'a'..'z'+1) {
psw[3] = d;
foreach(char e; 'a'..'z'+1) {
psw[4] = e;
auto hash = psw.sha256Of;
if (equal(hash, p1) || equal(hash, p2) || equal(hash, p3)) {
writefln("%s <=> %(%x%)", psw, hash);
}
}
}
}
}
}
sw.stop;
writeln(sw.peek);
}
//Specialization that supports static arrays too
bool equal(T)(const T[] p, const T[] q) {
if (p.length != q.length) {
return false;
}
for(int i=0; i<p.length; i++) {
if (p[i] != q[i]) {
return false;
}
}
return true;
}</syntaxhighlight>
{{out}}
Parallel run time: 9 secs, 684 ms, 678 ╬╝s, and 6 hnsecs<br>
Sequential run time: 29 secs, 298 ms, and 837 ╬╝s
<pre>apple <=> 3a7bd3e236a3d29eea436fcfb7e44c735d117c42d1c183542b6b9942dd4f1b
mmmmm <=> 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx <=> 1115dd80feaacefdf481f1f9070374a2a81e27880f187396db67958b27cbad</pre>
=={{header|Delphi}}==
{{libheader| System.SysUtils}}
{{libheader| System.Threading}}
{{libheader| DCPsha256}}[[https://github.com/StephenGenusa/DCPCrypt]]
<syntaxhighlight lang="delphi">
program Parallel_Brute_Force;
{$APPTYPE CONSOLE}
uses
System.SysUtils,
System.Threading,
DCPsha256;
function Sha256(W: string): string;
var
HashDigest: array[0..31] of byte;
d, i: Byte;
begin
Result := '';
with TDCP_sha256.Create(nil) do
begin
Init;
UpdateStr(W);
final(HashDigest[0]);
for i := 0 to High(HashDigest) do
Result := Result + lowercase(HashDigest[i].ToHexString(2));
end;
end;
procedure Force(a: int64);
var
password: string;
hash: string;
i, j, k, l: integer;
w: string;
const
Words: TArray<string> = ['1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad',
'3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b',
'74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f'];
begin
password := ' ';
password[1] := chr(97 + a);
for i := 97 to 122 do
begin
password[2] := chr(i);
for j := 97 to 122 do
begin
password[3] := chr(j);
for k := 97 to 122 do
begin
password[4] := chr(k);
for l := 97 to 122 do
begin
password[5] := chr(l);
hash := Sha256(password);
for w in Words do
begin
if SameText(hash, w) then
begin
Writeln('>>', password, ' => ', hash);
end;
end;
end;
end;
end;
end;
end;
var
s: string;
begin
TParallel.&For(0, 25, Force);
Writeln('Enter to exit');
readln;
end.</syntaxhighlight>
=={{header|Elixir}}==
<syntaxhighlight lang="elixir">
defmodule RosettacodeBruteForce do
require Logger
@spec start() :: :ok
def start() do
children = [
{Task.Supervisor, name: Bf.TaskSupervisor}
]
Supervisor.start_link(children, strategy: :one_for_one)
start_bf("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad")
start_bf("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
start_bf("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
:ok
end
@spec start_bf(String.t()) :: :ok
def start_bf(target) do
Enum.each(0..25, fn a ->
Enum.each(0..25, fn b ->
Task.Supervisor.async(Bf.TaskSupervisor, fn ->
solve_bf(a, b, target)
end)
end)
end)
:ok
end
defp solve_bf(a, b, target) do
Enum.each(0..25, fn x ->
Enum.each(0..25, fn y ->
Enum.each(0..25, fn z ->
candidate = List.to_string([?a + a, ?a + b, ?a + x, ?a + y, ?a + z])
if (check_hash?(candidate, target)) do
Logger.info("SOLVED: #{candidate} = #{target}")
end
end)
end)
end)
:ok
end
defp check_hash?(candidate, target) do
target == :crypto.hash(:sha256, candidate)
|> Base.encode16()
|> String.downcase()
end
end
</syntaxhighlight>
{{out}}
<pre>
08:19:43.178 [info] SOLVED: apple = 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
08:19:43.489 [info] SOLVED: zyzzx = 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
08:19:50.224 [info] SOLVED: mmmmm = 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
</pre>
=={{header|Erlang}}==
There are a total of 8 tasks, each handling a different set of prefixes (abc, def, ghi, jkl, mno, pqr, stuv, wxyz)
<syntaxhighlight lang="erlang">
#! /usr/bin/escript
-mode(compile).
-export([cracker/4, supervisor/3]).
hexdigit(N) when (N >= 0) and (N =< 9) -> N + $0;
hexdigit(N) when (N >= 10) and (N < 16) -> N - 10 + $a.
hexbyte(N) -> [hexdigit(N bsr 4), hexdigit(N band 15)].
match(Key, Hash) ->
B = crypto:hash(sha256, Key),
Hash == lists:append([hexbyte(X) || <<X:8/integer>> <= B]).
cracker(Prefixes, Rest, Hashes, Boss) ->
Results = [[[P|Q], Hash]
|| P <- Prefixes, Q <- Rest, Hash <- Hashes, match([P|Q], Hash)],
Boss ! {done, Results}.
supervisor(0, Results, Caller) -> Caller ! {done, Results};
supervisor(Tasks, Results, Caller) ->
receive
{done, Cracked} -> supervisor(Tasks - 1, Cracked ++ Results, Caller)
end.
main(_) ->
Tasks = ["abc", "def", "ghi", "jkl", "mno", "pqr", "stuv", "wxyz"],
Letter = lists:seq($a, $z),
Rest = [[B, C, D, E] || B <- Letter, C <- Letter, D <- Letter, E <- Letter],
Hashes = [
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
],
Boss = spawn(?MODULE, supervisor, [length(Tasks), [], self()]),
[spawn(?MODULE, cracker, [Prefixes, Rest, Hashes, Boss])
|| Prefixes <- Tasks],
receive
{done, Results} -> Results
end,
[io:format("~s: ~s~n", Result) || Result <- Results].
</syntaxhighlight>
{{Out}}
<pre>
$ ./par-brute.erl
zyzzx: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
mmmmm: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
apple: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
</pre>
=={{header|F_Sharp|F#}}==
<syntaxhighlight lang="fsharp">
(*
Nigel Galloway February 21st., 2017
*)
let N n i g e l =
let G = function
|"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"->Some(string n+string i+string g+string e+string l)
|"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"->Some(string n+string i+string g+string e+string l)
|"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"->Some(string n+string i+string g+string e+string l)
|_->None
G ([|byte n;byte i;byte g;byte e;byte l|]|>System.Security.Cryptography.SHA256.Create().ComputeHash|>Array.map(fun (x:byte)->System.String.Format("{0:x2}",x))|>String.concat "")
open System.Threading.Tasks
let n1 = Task.Factory.StartNew(fun ()->['a'..'m']|>List.collect(fun n->['a'..'m']|>List.collect(fun i->['a'..'m']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n2 = Task.Factory.StartNew(fun ()->['a'..'m']|>List.collect(fun n->['a'..'m']|>List.collect(fun i->['n'..'z']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n3 = Task.Factory.StartNew(fun ()->['a'..'m']|>List.collect(fun n->['n'..'z']|>List.collect(fun i->['a'..'m']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n4 = Task.Factory.StartNew(fun ()->['a'..'m']|>List.collect(fun n->['n'..'z']|>List.collect(fun i->['n'..'z']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n5 = Task.Factory.StartNew(fun ()->['n'..'z']|>List.collect(fun n->['a'..'m']|>List.collect(fun i->['a'..'m']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n6 = Task.Factory.StartNew(fun ()->['n'..'z']|>List.collect(fun n->['a'..'m']|>List.collect(fun i->['n'..'z']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n7 = Task.Factory.StartNew(fun ()->['n'..'z']|>List.collect(fun n->['n'..'z']|>List.collect(fun i->['a'..'m']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
let n8 = Task.Factory.StartNew(fun ()->['n'..'z']|>List.collect(fun n->['n'..'z']|>List.collect(fun i->['n'..'z']|>List.collect(fun g->['a'..'z']|>List.collect(fun e->['a'..'z']|>List.choose(fun l->N n i g e l))))))
for r in n1.Result@n2.Result@n3.Result@n4.Result@n5.Result@n6.Result@n7.Result@n8.Result do printfn "%s" r
</syntaxhighlight>
{{out}}
<pre>
mmmmm
apple
zyzzx
</pre>
=={{header|FreeBASIC}}==
{{trans|Visual_Basic_.NET}}
{{trans|BaCon}}
<syntaxhighlight lang="freebasic">Function SHA_256(Byval message As String) As String
#Macro Ch (x, y, z)
(((x) And (y)) Xor ((Not (x)) And z))
#EndMacro
#Macro Maj (x, y, z)
(((x) And (y)) Xor ((x) And (z)) Xor ((y) And (z)))
#EndMacro
#Macro sigma0 (x)
(((x) Shr 2 Or (x) Shl 30) Xor ((x) Shr 13 Or (x) Shl 19) Xor ((x) Shr 22 Or (x) Shl 10))
#EndMacro
#Macro sigma1 (x)
(((x) Shr 6 Or (x) Shl 26) Xor ((x) Shr 11 Or (x) Shl 21) Xor ((x) Shr 25 Or (x) Shl 7))
#EndMacro
#Macro sigma2 (x)
(((x) Shr 7 Or (x) Shl 25) Xor ((x) Shr 18 Or (x) Shl 14) Xor ((x) Shr 3))
#EndMacro
#Macro sigma3 (x)
(((x) Shr 17 Or (x) Shl 15) Xor ((x) Shr 19 Or (x) Shl 13) Xor ((x) Shr 10))
#EndMacro
Dim As Long i, j
Dim As Ubyte Ptr ww1
Dim As Uinteger<32> Ptr ww4
Dim As Ulongint l = Len(message)
' set the first bit after the message to 1
message = message + Chr(1 Shl 7)
' add one char to the length
Dim As Ulong padding = 64 - ((l + 1) Mod (512 \ 8))
' check if we have enough room for inserting the length
If padding < 8 Then padding += 64
message += String(padding, Chr(0)) ' adjust length
Dim As Ulong l1 = Len(message) ' new length
l = l * 8 ' orignal length in bits
' create ubyte ptr to point to l ( = length in bits)
Dim As Ubyte Ptr ub_ptr = Cast(Ubyte Ptr, @l)
For i = 0 To 7 'copy length of message to the last 8 bytes
message[l1 -1 - i] = ub_ptr[i]
Next
'table of constants
Dim As Uinteger<32> K(0 To ...) = { _
&H428a2f98, &H71374491, &Hb5c0fbcf, &He9b5dba5, &H3956c25b, &H59f111f1, _
&H923f82a4, &Hab1c5ed5, &Hd807aa98, &H12835b01, &H243185be, &H550c7dc3, _
&H72be5d74, &H80deb1fe, &H9bdc06a7, &Hc19bf174, &He49b69c1, &Hefbe4786, _
&H0fc19dc6, &H240ca1cc, &H2de92c6f, &H4a7484aa, &H5cb0a9dc, &H76f988da, _
&H983e5152, &Ha831c66d, &Hb00327c8, &Hbf597fc7, &Hc6e00bf3, &Hd5a79147, _
&H06ca6351, &H14292967, &H27b70a85, &H2e1b2138, &H4d2c6dfc, &H53380d13, _
&H650a7354, &H766a0abb, &H81c2c92e, &H92722c85, &Ha2bfe8a1, &Ha81a664b, _
&Hc24b8b70, &Hc76c51a3, &Hd192e819, &Hd6990624, &Hf40e3585, &H106aa070, _
&H19a4c116, &H1e376c08, &H2748774c, &H34b0bcb5, &H391c0cb3, &H4ed8aa4a, _
&H5b9cca4f, &H682e6ff3, &H748f82ee, &H78a5636f, &H84c87814, &H8cc70208, _
&H90befffa, &Ha4506ceb, &Hbef9a3f7, &Hc67178f2 }
Dim As Uinteger<32> h0 = &H6a09e667
Dim As Uinteger<32> h1 = &Hbb67ae85
Dim As Uinteger<32> h2 = &H3c6ef372
Dim As Uinteger<32> h3 = &Ha54ff53a
Dim As Uinteger<32> h4 = &H510e527f
Dim As Uinteger<32> h5 = &H9b05688c
Dim As Uinteger<32> h6 = &H1f83d9ab
Dim As Uinteger<32> h7 = &H5be0cd19
Dim As Uinteger<32> a, b, c, d, e, f, g, h
Dim As Uinteger<32> t1, t2, w(0 To 63)
For j = 0 To (l1 -1) \ 64 ' split into block of 64 bytes
ww1 = Cast(Ubyte Ptr, @message[j * 64])
ww4 = Cast(Uinteger<32> Ptr, @message[j * 64])
For i = 0 To 60 Step 4 'little endian -> big endian
Swap ww1[i ], ww1[i +3]
Swap ww1[i +1], ww1[i +2]
Next i
For i = 0 To 15 ' copy the 16 32bit block into the array
W(i) = ww4[i]
Next i
For i = 16 To 63 ' fill the rest of the array
w(i) = sigma3(W(i -2)) + W(i -7) + sigma2(W(i -15)) + W(i -16)
Next i
a = h0 : b = h1 : c = h2 : d = h3 : e = h4 : f = h5 : g = h6 : h = h7
For i = 0 To 63
t1 = h + sigma1(e) + Ch(e, f, g) + K(i) + W(i)
t2 = sigma0(a) + Maj(a, b, c)
h = g : g = f : f = e
e = d + t1
d = c : c = b : b = a
a = t1 + t2
Next i
h0 += a : h1 += b : h2 += c : h3 += d
h4 += e : h5 += f : h6 += g : h7 += h
Next j
Dim As String answer = Hex(h0, 8) + Hex(h1, 8) + Hex(h2, 8) + Hex(h3, 8)
answer += Hex(h4, 8) + Hex(h5, 8) + Hex(h6, 8) + Hex(h7, 8)
Return Lcase(answer)
End Function
Dim t0 As Double = Timer
Dim Shared sha256fp(0 To 2) As String
sha256fp(0) = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
sha256fp(1) = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
sha256fp(2) = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
Sub PrintCode(n As Integer)
Dim As String fp = sha256fp(n)
Dim As Integer c1, c2, c3, c4, c5
For c1 = 97 To 122
For c2 = 97 To 122
For c3 = 97 To 122
For c4 = 97 To 122
For c5 = 97 To 122
If fp = SHA_256(Chr(c1)+Chr(c2)+Chr(c3)+Chr(c4)+Chr(c5)) Then
Print Chr(c1)+Chr(c2)+Chr(c3)+Chr(c4)+Chr(c5); " => "; fp
Exit For, For, For, For, For
End If
Next c5
Next c4
Next c3
Next c2
Next c1
End Sub
For i As Byte= 0 to 2
PrintCode(i)
Next i
Sleep</syntaxhighlight>
=={{header|Frink}}==
This does not use any parallel processing but just demonstrates Frink's built-in password hashing.
<syntaxhighlight lang="frink">hashes = new set["1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"]
r = new range["a", "z"]
multifor array = [r,r,r,r,r]
{
str = join["", array]
hash = messageDigest[str, "SHA-256"]
if hashes.contains[hash]
println["$str: $hash"]
}</syntaxhighlight>
{{out}}
<pre>
apple: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|Go}}==
This solution runs 26 goroutines, one for each possible password first letter.
Goroutines run in parallel on a multicore system.
<syntaxhighlight lang="go">package main
import (
"crypto/sha256"
"encoding/hex"
"log"
"sync"
)
var hh = []string{
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f",
}
func main() {
log.SetFlags(0)
hd := make([][sha256.Size]byte, len(hh))
for i, h := range hh {
hex.Decode(hd[i][:], []byte(h))
}
var wg sync.WaitGroup
wg.Add(26)
for c := byte('a'); c <= 'z'; c++ {
go bf4(c, hd, &wg)
}
wg.Wait()
}
func bf4(c byte, hd [][sha256.Size]byte, wg *sync.WaitGroup) {
p := []byte("aaaaa")
p[0] = c
p1 := p[1:]
p:
for {
ph := sha256.Sum256(p)
for i, h := range hd {
if h == ph {
log.Println(string(p), hh[i])
}
}
for i, v := range p1 {
if v < 'z' {
p1[i]++
continue p
}
p1[i] = 'a'
}
wg.Done()
return
}
}</syntaxhighlight>
{{out}}
<pre>
zyzzx 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
apple 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
</pre>
=={{header|Haskell}}==
Uses libraries:
<ul>
<li>cryptonite</li>
<li>monad-par</li>
<li>bytestring</li>
<li>split</li>
</ul>
<br/>
Compile with "-O2 -threaded"<br/>
7.391s elapsed on a 2.5 GHz Dual-Core Intel Core i7 Macbook Pro.
<syntaxhighlight lang="haskell">import Control.Concurrent (setNumCapabilities)
import Crypto.Hash (hashWith, SHA256 (..), Digest)
import Control.Monad (replicateM, join, (>=>))
import Control.Monad.Par (runPar, get, spawnP)
import Data.ByteString (pack)
import Data.List.Split (chunksOf)
import GHC.Conc (getNumProcessors)
import Text.Printf (printf)
hashedValues :: [Digest SHA256]
hashedValues = read <$>
[ "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
, "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
, "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad" ]
bruteForce :: Int -> [(String, String)]
bruteForce n = runPar $ join <$>
(mapM (spawnP . foldr findMatch []) >=> mapM get) chunks
where
chunks = chunksOf (26^5 `div` n) $ replicateM 5 [97..122]
findMatch s accum
| hashed `elem` hashedValues = (show hashed, show bStr) : accum
| otherwise = accum
where
bStr = pack s
hashed = hashWith SHA256 bStr
main :: IO ()
main = do
cpus <- getNumProcessors
setNumCapabilities cpus
printf "Using %d cores\n" cpus
mapM_ (uncurry (printf "%s -> %s\n")) (bruteForce cpus)</syntaxhighlight>
{{out}}
<pre>brute
Using 4 cores
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b -> apple
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f -> mmmmm
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad -> zyzzx
</pre>
Or using worker threads with buffered read/write channels.
<p>Here all the possible test strings are batched as a stream that is fed to worker threads via a single read channel (batchChan). Each worker thread listens to the read channel (batchChan) and will write to the write channel (resultChan) when it finds a match. The worker threads loop indefinitely returning to read the next message on the read channel (batchChan). The main thread listens to the write channel (resultChan) and terminates once all three messages have been received.</p>
<syntaxhighlight lang="haskell">import Control.Concurrent (forkIO, setNumCapabilities)
import Control.Concurrent.Chan (Chan, newChan, readChan, writeList2Chan)
import Control.Monad (replicateM, replicateM_, forever)
import Crypto.Hash (SHA256(..), Digest, hashWith)
import Data.Bifunctor (first)
import Data.ByteString (ByteString, pack)
import Data.Char (isDigit)
import Data.List.Split (chunksOf)
import Data.Word (Word8)
import GHC.Conc (getNumProcessors)
import System.Environment (getArgs)
import Text.Printf (printf)
type Decrypted = String
type Encrypted = Digest SHA256
type TestString = [Word8]
hashedValues :: [Encrypted]
hashedValues = read <$>
[ "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
, "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
, "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad" ]
chunks :: [[TestString]]
chunks = chunksOf (10^3) $ replicateM 5 [97..122]
findMatch :: TestString -> [(Encrypted, Decrypted)] -> [(Encrypted, Decrypted)]
findMatch w acc
| hashed `elem` hashedValues = (hashed, show bStr):acc
| otherwise = acc
where
bStr = pack w
hashed = hashWith SHA256 bStr
searchWorker :: Chan [TestString] -> Chan (Encrypted, Decrypted) -> IO ()
searchWorker batchChan resultChan = forever (readChan batchChan >>= writeList2Chan resultChan . foldr findMatch [])
parseInput :: [String] -> Int -> Int
parseInput [] n = n
parseInput (s:_) n = if all isDigit s then read s else n
main :: IO ()
main = do
workers <- getArgs
cpus <- getNumProcessors
let wCount = parseInput workers cpus
setNumCapabilities wCount
printf "Using %d workers on %d cpus.\n" wCount cpus
resultChan <- newChan
batchChan <- newChan
replicateM_ wCount (forkIO $ searchWorker batchChan resultChan)
writeList2Chan batchChan chunks
replicateM_ (length hashedValues) (readChan resultChan >>= uncurry (printf "%s -> %s\n") . first show)</syntaxhighlight>
{{out}}
<pre>brute2
Using 4 workers on 4 cpus.
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b -> "apple"
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f -> "mmmmm"
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad -> "zyzzx"</pre>
=={{header|Java}}==
{{works with |Java| 1.5}}
This example uses Java's multithreading capabilities. Note that the Java Virtual Machine will use native Threads if the underlying platform supprts them. If there is no native thread support, the Java VM will emulate threads.
This implementation runs 3 threads (one per hash to crack), and short-stops when a match for a hash is found.
<syntaxhighlight lang="java">import javax.xml.bind.DatatypeConverter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* "Main Program" that does the parallel processing
*/
public class ParallelBruteForce {
public static void main(String[] args) throws NoSuchAlgorithmException {
//the hashes to be cracked
String[] hashes = {"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"};
//An ExecutorService is a high-level parallel programming facility, that can execute a number of tasks
//the FixedThreadPool is an ExecutorService that uses a configurable number of parallel threads
ExecutorService executorService = Executors.newFixedThreadPool(3);
//Submit one Task per hash to the thread po
for (String hash : hashes) {
executorService.submit(new Forcer(hash));
}
//An ExecutorSerice must be shut down properly (this also causes the program to await termination of
// all pending tasks in the thread pool)
executorService.shutdown();
}
}
/**
* The Class that contains the actual brute-forcing task.
* <p>
* It implements the build-in Interface "Runnable", so it can be run on a Thread or a Thread-Execution-Facility
* (such as an ExecutorService).
*/
class Forcer implements Runnable {
private static final int LENGTH = 5;
//These will sore the hash to be cracked in both bytes (required for comparison) and String representation
// (required for output)
private final byte[] crackMe;
private final String crackMeString;
//The MessageDigest does the SHA-256 caclulation. Note that this may throw a NoSuchAlgorithmException when there
// is no SHA-256 implementation in the local standard libraries (but that algorithm is mandatory, so this code
// probably will never throw that Excpetion
private final MessageDigest digest = MessageDigest.getInstance("SHA-256");
public Forcer(String crackMe) throws NoSuchAlgorithmException {
this.crackMeString = crackMe;
this.crackMe = DatatypeConverter.parseHexBinary(crackMe);
}
@Override
public void run() {
String match = "";
//all loops use this array for their counters. This is very dirty and should never be done in production!
char[] chars = new char[LENGTH];
//used for short-stopping when a match is found - one could abuse the match-variable for this, but this is
// much clearer
boolean done = false;
for (chars[0] = 'a'; chars[0] <= 'z' && !done; chars[0]++) {
for (chars[1] = 'a'; chars[1] <= 'z' && !done; chars[1]++) {
for (chars[2] = 'a'; chars[2] <= 'z' && !done; chars[2]++) {
for (chars[3] = 'a'; chars[3] <= 'z' && !done; chars[3]++) {
for (chars[4] = 'a'; chars[4] <= 'z' && !done; chars[4]++) {
//the String creation is necessary to get the encoding right
String canidate = new String(chars);
//genenrate SHA-256 hash using Java's standard facilities
byte[] hash = digest.digest(canidate.getBytes());
if (Arrays.equals(hash, crackMe)) {
match = canidate;
done = true;
}
}
}
}
}
}
System.out.println(String.format("Hash %s has the following match : %s", crackMeString, match));
}
}
</syntaxhighlight>
{{out}}<pre>Hash 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b has the following match : apple
Hash 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f has the following match : mmmmm
Hash 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad has the following match : zyzzx</pre>
===Faster Alternative Version===
Combines ideas from the C++ solution and the above Java version. Execution time is about 1.6 seconds on my system (3.2 GHz Quad-Core Intel Core i5, macOS 10.15.3).
<syntaxhighlight lang="java">import javax.xml.bind.DatatypeConverter;
import java.security.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
public class ParallelBruteForce {
public static void main(String[] args) {
try {
String[] hashes = {
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"};
ParallelBruteForce pbf = new ParallelBruteForce(5, hashes);
pbf.findPasswords();
} catch (Exception e) {
e.printStackTrace();
}
}
private ParallelBruteForce(int length, String[] hashes) {
this.length = length;
this.hashes = hashes;
digests = new byte[hashes.length][];
for (int i = 0; i < hashes.length; ++i)
digests[i] = DatatypeConverter.parseHexBinary(hashes[i]);
}
private void findPasswords() throws Exception {
count.set(length);
int processors = Runtime.getRuntime().availableProcessors();
ExecutorService svc = Executors.newFixedThreadPool(processors);
List<Future<?>> tasks = new ArrayList<>();
for (int i = 0; i < 26; ++i)
tasks.add(svc.submit(new PasswordFinder((byte)(97 + i))));
for (Future<?> task : tasks)
task.get();
svc.shutdown();
}
private static boolean nextPassword(byte[] passwd, int start) {
int len = passwd.length;
for (int i = len - 1; i >= start; --i) {
if (passwd[i] < 122) {
++passwd[i];
return true;
}
passwd[i] = 97;
}
return false;
}
private class PasswordFinder implements Runnable {
private byte ch;
private MessageDigest md = MessageDigest.getInstance("SHA-256");
private PasswordFinder(byte c) throws NoSuchAlgorithmException {
ch = c;
}
public void run() {
byte[] passwd = new byte[length];
Arrays.fill(passwd, (byte)97);
passwd[0] = ch;
while (count.get() > 0) {
byte[] digest = md.digest(passwd);
for (int m = 0; m < hashes.length; ++m) {
if (Arrays.equals(digest, digests[m])) {
count.decrementAndGet();
System.out.println("password: " + new String(passwd) + ", hash: " + hashes[m]);
break;
}
}
if (!nextPassword(passwd, 1))
break;
}
}
}
private int length;
private String[] hashes;
private byte[][] digests;
private AtomicInteger count = new AtomicInteger();
}</syntaxhighlight>
{{out}}
<pre>
password: apple, hash: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
password: mmmmm, hash: 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
password: zyzzx, hash: 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|Julia}}==
<syntaxhighlight lang="julia">@everywhere using SHA
@everywhere function bruteForceRange(startSerial, numberToDo)
targets = ["1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"]
targets = map(hex2bytes, targets)
for count = 1 : numberToDo
password = [UInt8(97 + x) for x in digits(UInt8, startSerial + count, 26, 5)]
hashbytes = sha256(password)
if (hashbytes[1] == 0x11 || hashbytes[1] == 0x3a || hashbytes[1] == 0x74) && findfirst(targets, hashbytes) > 0
hexstring = join(hex(x,2) for x in hashbytes)
passwordstring = join(map(Char, password))
println("$passwordstring --> $hexstring")
end
end
return 0
end
@everywhere perThread = div(26^5, Sys.CPU_CORES)
pmap(x -> bruteForceRange(x * perThread, perThread), 0:Sys.CPU_CORES-1)
</syntaxhighlight>
{{out}}<pre>From worker 2: apple --> 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
From worker 3: zyzzx --> 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
From worker 4: mmmmm --> 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f</pre>
=={{header|Kotlin}}==
{{trans|C#}}
<syntaxhighlight lang="scala">// version 1.1.51
import java.security.MessageDigest
fun stringHashToByteHash(hash: String): ByteArray {
val ba = ByteArray(32)
for (i in 0 until 64 step 2) ba[i / 2] = hash.substring(i, i + 2).toInt(16).toByte()
return ba
}
fun ByteArray.matches(other: ByteArray): Boolean {
for (i in 0 until 32) {
if (this[i] != other[i]) return false
}
return true
}
fun main(args: Array<String>) {
val stringHashes = listOf(
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
)
val byteHashes = List(3) { stringHashToByteHash(stringHashes[it]) }
val letters = List(26) { (97 + it).toByte() }
letters.stream().parallel().forEach {
val md = MessageDigest.getInstance("SHA-256")
val range = 97..122
val pwd = ByteArray(5)
pwd[0] = it
for (i1 in range) {
pwd[1] = i1.toByte()
for (i2 in range) {
pwd[2] = i2.toByte()
for (i3 in range) {
pwd[3] = i3.toByte()
for (i4 in range) {
pwd[4] = i4.toByte()
val ba = md.digest(pwd)
for (j in 0..2) {
if (ba.matches(byteHashes[j])) {
val password = pwd.toString(Charsets.US_ASCII)
println("$password => ${stringHashes[j]}")
break
}
}
}
}
}
}
}
}</syntaxhighlight>
{{out}}
<pre>
mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="mathematica">testPassword[pass_String] :=
If[MemberQ[{16^^1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad,
16^^3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b,
16^^74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f},
Hash[pass, "SHA256"]], Print[pass]];
chars=CharacterRange["a","z"];
ParallelDo[
testPassword[StringJoin[a, b, c, d, e]],
{a, chars}, {b, chars}, {c, chars}, {d, chars}, {e, chars}]</syntaxhighlight>
=={{header|Modula-2}}==
<syntaxhighlight lang="modula2">MODULE PBF;
FROM FormatString IMPORT FormatString;
FROM SHA256 IMPORT SHA256,Create,Destroy,HashBytes,Finalize,GetHash;
FROM SYSTEM IMPORT ADR,ADDRESS,BYTE;
FROM Terminal IMPORT Write,WriteString,WriteLn,ReadChar;
FROM Threads IMPORT Thread,CreateThread,WaitForThreadTermination;
PROCEDURE PrintHexBytes(str : ARRAY OF BYTE; limit : INTEGER);
VAR
buf : ARRAY[0..7] OF CHAR;
i,v : INTEGER;
BEGIN
i := 0;
WHILE i<limit DO
v := ORD(str[i]);
IF v < 16 THEN
WriteString("0")
END;
FormatString("%h", buf, v);
WriteString(buf);
INC(i);
END
END PrintHexBytes;
PROCEDURE Check(str : ARRAY OF CHAR);
TYPE
HA = ARRAY[0..31] OF BYTE;
CONST
h1 = HA{3aH, 7bH, 0d3H, 0e2H, 36H, 0aH, 3dH, 29H, 0eeH, 0a4H, 36H, 0fcH, 0fbH, 7eH, 44H, 0c7H, 35H, 0d1H, 17H, 0c4H, 2dH, 1cH, 18H, 35H, 42H, 0bH, 6bH, 99H, 42H, 0ddH, 4fH, 1bH};
h2 = HA{74H, 0e1H, 0bbH, 62H, 0f8H, 0daH, 0bbH, 81H, 25H, 0a5H, 88H, 52H, 0b6H, 3bH, 0dfH, 6eH, 0aeH, 0f6H, 67H, 0cbH, 56H, 0acH, 7fH, 7cH, 0dbH, 0a6H, 0d7H, 30H, 5cH, 50H, 0a2H, 2fH};
h3 = HA{11H, 15H, 0ddH, 80H, 0fH, 0eaH, 0acH, 0efH, 0dfH, 48H, 1fH, 1fH, 90H, 70H, 37H, 4aH, 2aH, 81H, 0e2H, 78H, 80H, 0f1H, 87H, 39H, 6dH, 0b6H, 79H, 58H, 0b2H, 07H, 0cbH, 0adH};
VAR
hash : SHA256;
out : ARRAY[0..31] OF BYTE;
i : CARDINAL;
match : BOOLEAN;
BEGIN
hash := Create();
HashBytes(hash, ADR(str), HIGH(str)+1);
Finalize(hash);
GetHash(hash, out);
Destroy(hash);
match := TRUE;
FOR i:=0 TO HIGH(out) DO
IF out[i] # h1[i] THEN
match := FALSE;
BREAK
END
END;
IF match THEN
WriteString(str);
WriteString(" ");
PrintHexBytes(out, 32);
WriteLn;
RETURN
END;
match := TRUE;
FOR i:=0 TO HIGH(out) DO
IF out[i] # h2[i] THEN
match := FALSE;
BREAK
END
END;
IF match THEN
WriteString(str);
WriteString(" ");
PrintHexBytes(out, 32);
WriteLn;
RETURN
END;
match := TRUE;
FOR i:=0 TO HIGH(out) DO
IF out[i] # h3[i] THEN
match := FALSE;
BREAK
END
END;
IF match THEN
WriteString(str);
WriteString(" ");
PrintHexBytes(out, 32);
WriteLn
END
END Check;
PROCEDURE CheckWords(a : CHAR);
VAR
word : ARRAY[0..4] OF CHAR;
b,c,d,e : CHAR;
BEGIN
word[0] := a;
FOR b:='a' TO 'z' DO
word[1] := b;
FOR c:='a' TO 'z' DO
word[2] := c;
FOR d:='a' TO 'z' DO
word[3] := d;
FOR e:='a' TO 'z' DO
word[4] := e;
Check(word)
END
END
END
END
END CheckWords;
PROCEDURE CheckAF(ptr : ADDRESS) : CARDINAL;
VAR a : CHAR;
BEGIN
FOR a:='a' TO 'f' DO
CheckWords(a)
END;
RETURN 0
END CheckAF;
PROCEDURE CheckGM(ptr : ADDRESS) : CARDINAL;
VAR a : CHAR;
BEGIN
FOR a:='g' TO 'm' DO
CheckWords(a)
END;
RETURN 0
END CheckGM;
PROCEDURE CheckNS(ptr : ADDRESS) : CARDINAL;
VAR a : CHAR;
BEGIN
FOR a:='n' TO 's' DO
CheckWords(a)
END;
RETURN 0
END CheckNS;
PROCEDURE CheckTZ(ptr : ADDRESS) : CARDINAL;
VAR a : CHAR;
BEGIN
FOR a:='t' TO 'z' DO
CheckWords(a)
END;
RETURN 0
END CheckTZ;
VAR
t1,t2,t3,t4 : Thread;
s1,s2,s3,s4 : CARDINAL;
BEGIN
CreateThread(t1,CheckAF,NIL,0,TRUE);
CreateThread(t2,CheckGM,NIL,0,TRUE);
CreateThread(t3,CheckNS,NIL,0,TRUE);
CreateThread(t4,CheckTZ,NIL,0,TRUE);
WaitForThreadTermination(t1,-1,s1);
WaitForThreadTermination(t2,-1,s2);
WaitForThreadTermination(t3,-1,s3);
WaitForThreadTermination(t4,-1,s4);
WriteString("Done");
WriteLn;
ReadChar
END PBF.</syntaxhighlight>
{{out}}
<pre>apple 3A7BD3E2360A3D29EEA436FCFB7E44C735D117C42D1C1835420B6B9942DD4F1B
mmmmm 74E1BB62F8DABB8125A58852B63BDF6EAEF667CB56AC7F7CDBA6D7305C50A22F
zyzzx 1115DD800FEAACEFDF481F1F9070374A2A81E27880F187396DB67958B207CBAD
Done</pre>
=={{header|Nim}}==
{{libheader|Nimcrypto}}
Using a thread for each starting character.
Note that the program must be compiled with option --threads:on.
<syntaxhighlight lang="nim">import strutils, threadpool
import nimcrypto
const
# List of hexadecimal representation of target hashes.
HexHashes = ["1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"]
# List of target hashes.
Hashes = [MDigest[256].fromHex(HexHashes[0]),
MDigest[256].fromHex(HexHashes[1]),
MDigest[256].fromHex(HexHashes[2])]
Letters = 'a'..'z'
proc findHashes(a: char) =
## Build the arrays of five characters starting with the value
## of "a" and check if their hash matches one of the targets.
## Print the string and the hash value if a match is found.
for b in Letters:
for c in Letters:
for d in Letters:
for e in Letters:
let s = [a, b, c, d, e]
let h = sha256.digest(s)
for i, target in Hashes:
if h == target: # Match.
echo s.join(), " → ", HexHashes[i]
# Launch a thread for each starting character.
for a in Letters:
spawn findHashes(a)
sync()</syntaxhighlight>
{{out}}
<pre>apple → 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm → 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx → 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|Perl}}==
Uses threads library to do naive search using 26 threads ("aaaaa" .. "azzzz", "baaaa" .. "bzzzz", etc.). No effort is made to early exit.
<syntaxhighlight lang="perl">use Digest::SHA qw/sha256_hex/;
use threads;
use threads::shared;
my @results :shared;
print "$_ : ",join(" ",search($_)), "\n" for (qw/
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
/);
sub search {
my $hash = shift;
@results = ();
$_->join() for map { threads->create('tsearch', $_, $hash) } 0..25;
return @results;
}
sub tsearch {
my($tnum, $hash) = @_;
my $s = chr(ord("a")+$tnum) . "aaaa";
for (1..456976) { # 26^4
push @results, $s if sha256_hex($s) eq $hash;
$s++;
}
}</syntaxhighlight>
{{out}}
<pre>
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad : zyzzx
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b : apple
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f : mmmmm
</pre>
=={{header|Phix}}==
Each thread processes one start letter at a time, until they are all done.
<!--<syntaxhighlight lang="phix">(notonline)-->
<span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #000000;">sha256</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #000000;">VM</span><span style="color: #0000FF;">\</span><span style="color: #000000;">pThreadN</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span> <span style="color: #000080;font-style:italic;">-- (shd not be rqd on 0.8.1+)</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">asHex</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">res</span> <span style="color: #0000FF;">&=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%02X"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">res</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">starts</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">start_cs</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">init_cs</span><span style="color: #0000FF;">(),</span> <span style="color: #000080;font-style:italic;">-- critical section</span>
<span style="color: #000000;">hashes</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">x</span><span style="color: #008000;">"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">x</span><span style="color: #008000;">"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">x</span><span style="color: #008000;">"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">find_passwords</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">thrashes</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span> <span style="color: #000080;font-style:italic;">-- thread-safe copy of hashes</span>
<span style="color: #7060A8;">enter_cs</span><span style="color: #0000FF;">(</span><span style="color: #000000;">start_cs</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hashes</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">thrashes</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">thrashes</span><span style="color: #0000FF;">,</span><span style="color: #000000;">thread_safe_string</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hashes</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]))</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #7060A8;">leave_cs</span><span style="color: #0000FF;">(</span><span style="color: #000000;">start_cs</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #004600;">true</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">pwd</span>
<span style="color: #7060A8;">enter_cs</span><span style="color: #0000FF;">(</span><span style="color: #000000;">start_cs</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">starts</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">leave_cs</span><span style="color: #0000FF;">(</span><span style="color: #000000;">start_cs</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">exit</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">pwd</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">starts</span><span style="color: #0000FF;">[$]&</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #008000;">'a'</span><span style="color: #0000FF;">,</span><span style="color: #000000;">4</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">starts</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">starts</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..$-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #7060A8;">leave_cs</span><span style="color: #0000FF;">(</span><span style="color: #000000;">start_cs</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pwd</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">hash</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sha256</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pwd</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hash</span><span style="color: #0000FF;">,</span><span style="color: #000000;">thrashes</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> <span style="color: #0000FF;">?{</span><span style="color: #000000;">pwd</span><span style="color: #0000FF;">,</span><span style="color: #000000;">asHex</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hash</span><span style="color: #0000FF;">)}</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">5</span> <span style="color: #008080;">to</span> <span style="color: #000000;">2</span> <span style="color: #008080;">by</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">pwd</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]!=</span><span style="color: #008000;">'z'</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">pwd</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">exit</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">pwd</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">'a'</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">then</span> <span style="color: #000000;">pwd</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #000000;">exit_thread</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">nthreads</span><span style="color: #0000FF;">=</span><span style="color: #000000;">4</span> <span style="color: #008080;">to</span> <span style="color: #000000;">4</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">t0</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">time</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">starts</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">tagset</span><span style="color: #0000FF;">(</span><span style="color: #008000;">'a'</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'z'</span><span style="color: #0000FF;">,-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">threads</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">nthreads</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">threads</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">threads</span><span style="color: #0000FF;">,</span><span style="color: #000000;">create_thread</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">routine_id</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"find_passwords"</span><span style="color: #0000FF;">),{}))</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<span style="color: #000000;">wait_thread</span><span style="color: #0000FF;">(</span><span style="color: #000000;">threads</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">elapsed</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">time</span><span style="color: #0000FF;">()-</span><span style="color: #000000;">t0</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"completed with %d threads in %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">nthreads</span><span style="color: #0000FF;">,</span><span style="color: #000000;">e</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<!--</syntaxhighlight>-->
{{out}} (with nthreads loop from 1 to 4, and for that case CPU use in Task Manager shows a very clear step pattern.)
<pre>
{"apple","3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"}
{"mmmmm","74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"}
{"zyzzx","1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"}
completed with 1 threads in 29.1s
{"apple","3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"}
{"mmmmm","74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"}
{"zyzzx","1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"}
completed with 2 threads in 16.1s
{"apple","3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"}
{"mmmmm","74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"}
{"zyzzx","1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"}
completed with 3 threads in 13.8s
{"apple","3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"}
{"mmmmm","74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"}
{"zyzzx","1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"}
completed with 4 threads in 12.7s
</pre>
=={{header|PureBasic}}==
<syntaxhighlight lang="purebasic">UseSHA2Fingerprint()
NewList sha256fp.s()
AddElement(sha256fp()) : sha256fp() = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
AddElement(sha256fp()) : sha256fp() = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
AddElement(sha256fp()) : sha256fp() = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
Procedure PrintCode(n.i)
Shared sha256fp()
SelectElement(sha256fp(), n) : fp$ = sha256fp()
For c1 = 'a' To 'z'
For c2 = 'a' To 'z'
For c3 = 'a' To 'z'
For c4 = 'a' To 'z'
For c5 = 'a' To 'z'
If fp$ = StringFingerprint(Chr(c1) + Chr(c2) + Chr(c3) + Chr(c4) + Chr(c5), #PB_Cipher_SHA2, 256); maybe set enconding
PrintN(Chr(c1) + Chr(c2) + Chr(c3) + Chr(c4) + Chr(c5) + " => " + fp$)
Break(5)
EndIf
Next c5
Next c4
Next c3
Next c2
Next c1
EndProcedure
Dim mythread(ListSize(sha256fp()))
If OpenConsole("")
StartTime.q = ElapsedMilliseconds()
For i=0 To ListSize(sha256fp()) - 1
mythread(i)=CreateThread(@PrintCode(), i)
Next
For i=0 To ListSize(sha256fp()) - 1
WaitThread(mythread(i))
Next
PrintN("-----------")
PrintN(Str(ElapsedMilliseconds() - StartTime)+" Milliseconds needed")
Input()
EndIf
End
; EnableThread</syntaxhighlight>
{{out}}
<pre>apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
-----------
36955 Milliseconds needed</pre>
=={{header|Python}}==
<syntaxhighlight lang="python">import multiprocessing
from hashlib import sha256
h1 = bytes().fromhex("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad")
h2 = bytes().fromhex("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
h3 = bytes().fromhex("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
def brute(firstletterascii: int):
global h1, h2, h3
letters = bytearray(5)
letters[0] = firstletterascii
for letters[1] in range(97, 97 + 26):
for letters[2] in range(97, 97 + 26):
for letters[3] in range(97, 97 + 26):
for letters[4] in range(97, 97 + 26):
digest = sha256(letters).digest()
if digest == h1 or digest == h2 or digest == h3:
password = "".join(chr(x) for x in letters)
print(password + " => " + digest.hex())
return 0
def main():
with multiprocessing.Pool() as p:
p.map(brute, range(97, 97 + 26))
if __name__ == "__main__":
main()</syntaxhighlight>
{{out}}
Line 75 ⟶ 1,892:
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|
Tests are included firstly to check it works, but they also provide an opportunity to time
the single threaded version.
<syntaxhighlight lang="racket">#lang racket/base
(require racket/place
racket/list
racket/match
;; requires sha package. install it in DrRacket's "File/Install Package..."
;; or with raco:
;; % raco pkg install sha
sha
(only-in openssl/sha1 hex-string->bytes))
(define (brute css targs)
(define (sub-work i) (let ((cs (list-ref css i))) (in-range (car cs) (cdr cs))))
(define-values (as bs cs ds es) (apply values (map sub-work (range 5))))
(define s (make-bytes 5))
(for*/list ((a as) #:when (bytes-set! s 0 a)
(b bs) #:when (bytes-set! s 1 b)
(c cs) #:when (bytes-set! s 2 c)
(d ds) #:when (bytes-set! s 3 d)
(e es) #:when (bytes-set! s 4 e)
(h (in-value (sha256 s)))
(t (in-list targs))
#:when (bytes=? t h))
(eprintf "found ~s -> ~s~%" t s)
(cons (bytes-copy s) t)))
;; ---------------------------------------------------------------------------------------------------
(unless (place-enabled?) (error "We're using places... they're not enabled!"))
(define target-list
(map hex-string->bytes
(list "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")))
(define (run-place/assign-task sub-task)
(define there (place here
(match-define (cons work targs) (place-channel-get here))
(place-channel-put here (brute work targs))))
(place-channel-put there (cons sub-task target-list))
there)
(define (task->subtasks css n-tasks)
(match css
[(list (and initial-range (cons A Z+)) common-tail ...)
(define step (quotient (+ n-tasks (- Z+ A)) n-tasks))
(for/list ((a (in-range A Z+ step)))
;; replace the head with a sub-task head
(cons (cons a (min (+ a step) Z+)) common-tail))]))
(define readable-pair (match-lambda [(cons x (app bytes->hex-string s)) (cons x s)]))
(define (parallel-brute css (n-tasks (processor-count)))
(define the-places (map run-place/assign-task (task->subtasks css n-tasks)))
(define collected-results (append* (map place-channel-get the-places)))
(map readable-pair collected-results))
(define 5-char-lowercase-work
(make-list 5 (cons (char->integer #\a) (add1 (char->integer #\z)))))
;; ---------------------------------------------------------------------------------------------------
(module+ main
(time (parallel-brute 5-char-lowercase-work)))
;; ---------------------------------------------------------------------------------------------------
(module+ test
(require rackunit)
(check-equal?
(bytes->hex-string (sha256 #"mmmmm"))
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
"SHA-256 works as expected")
(check-equal?
(hex-string->bytes "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
#"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/"
"This is the raw value we'll be hashing to")
(define m-idx (char->integer #\m))
(define m-idx+ (add1 m-idx))
(check-equal?
(brute (make-list 5 (cons m-idx m-idx+)) target-list)
(list
(cons
#"mmmmm"
#"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/")))
;; Brute works without parallelism
;; check when you have the time... it takes a minute (literally)
(check-equal?
(time
(brute 5-char-lowercase-work target-list))
'((#"apple"
. #":{\323\3426\n=)\356\2446\374\373~D\3075\321\27\304-\34\0305B\vk\231B\335O\e")
(#"mmmmm"
.
#"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/")
(#"zyzzx"
.
#"\21\25\335\200\17\352\254\357\337H\37\37\220p7J*\201\342x\200\361\2079m\266yX\262\a\313\255"))
"without parallelism, it works"))</syntaxhighlight>
{{out}}
Test phase of run:
<pre>found #"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/" -> #"mmmmm"
found #":{\323\3426\n=)\356\2446\374\373~D\3075\321\27\304-\34\0305B\vk\231B\335O\e" -> #"apple"
found #"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/" -> #"mmmmm"
found #"\21\25\335\200\17\352\254\357\337H\37\37\220p7J*\201\342x\200\361\2079m\266yX\262\a\313\255" -> #"zyzzx"
cpu time: 19593 real time: 19581 gc time: 2247
</pre>
Main phase of run:
<pre>found #"\21\25\335\200\17\352\254\357\337H\37\37\220p7J*\201\342x\200\361\2079m\266yX\262\a\313\255" -> #"zyzzx"
found #":{\323\3426\n=)\356\2446\374\373~D\3075\321\27\304-\34\0305B\vk\231B\335O\e" -> #"apple"
found #"t\341\273b\370\332\273\201%\245\210R\266;\337n\256\366g\313V\254\177|\333\246\3270\\P\242/" -> #"mmmmm"
cpu time: 30641 real time: 4681 gc time: 0
'((#"apple" . "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
(#"mmmmm" . "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
(#"zyzzx" . "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"))</pre>
=={{header|Raku}}==
(formerly Perl 6)
This solution can be changed from parallel to serial by removing the <code>.race</code> method.
<syntaxhighlight lang="raku"
constant @alpha2 =
constant @alpha3 =
my %WANTED = set <
Line 88 ⟶ 2,030:
sub find_it ( $first_two ) {
my
}
()
}
.say for flat @alpha2.race(:1batch).map:
{{Out}}
<pre>apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
Line 101 ⟶ 2,043:
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
Testers can adjust the run speed by replacing the @alpha constants with
<syntaxhighlight lang="raku" line>
# True to actual RC task, but slowest
constant @alpha2 = 'aa' .. 'zz';
constant @alpha3 = 'aaa' .. 'zzz';
# Reduced alphabets for speed during development & testing
constant @alpha2 = [X~] <a m p y z> xx 2;
constant @alpha3 = [X~] <e l m p x z> xx 3;
</syntaxhighlight>
=={{header|
In this solution the number of threads is the number of logical processors on the machine. `distribute_work()` distributes the work more or less equally between the threads.
<syntaxhighlight lang="rust">// [dependencies]
// rust-crypto = "0.2.36"
// num_cpus = "1.7.0"
// hex = "0.2.0"
extern crate crypto;
extern crate num_cpus;
extern crate hex;
use std::thread;
use std::cmp::min;
use crypto::sha2::Sha256;
use crypto::digest::Digest;
use hex::{FromHex, ToHex};
let hashes = vec![
decode("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"),
decode("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"),
decode("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"),
];
let mut threads = Vec::new();
let mut ranges = distribute_work();
while let Some(range) = ranges.pop() {
let hashes = hashes.clone();
threads.push(thread::spawn(
move || search(range.0, range.1, hashes.clone()),
));
}
while let Some(t) = threads.pop() {
t.join().ok();
}
}
fn search(from: [u8; 5], to: [u8; 5], hashes: Vec<[u8; 256 / 8]>) {
let mut password = from.clone();
while password <= to {
let mut sha256 = Sha256::new();
sha256.input(&password);
let mut result = [0u8; 256 / 8];
sha256.result(&mut result);
for hash in hashes.iter() {
if *hash == result {
println!(
"{}{}{}{}{} {}",
password[0] as char,
password[1] as char,
password[2] as char,
password[3] as char,
password[4] as char,
hash.to_hex()
);
}
}
password = next(&password);
}
}
fn next(password: &[u8; 5]) -> [u8; 5] {
let mut result = password.clone();
for i in (0..result.len()).rev() {
if result[i] == b'z' {
if i == 0 {
result[i] = b'z' + 1;
} else {
result[i] = b'a';
}
} else {
result[i] += 1;
break;
}
}
result.clone()
}
fn distribute_work() -> Vec<([u8; 5], [u8; 5])> {
let mut ranges = Vec::new();
let num_cpus = min(num_cpus::get(), 26) as u8;
let div = 25 / num_cpus;
let mut remainder = 25 % num_cpus;
let mut from = b'a';
while from < b'z' {
let to = from + div +
if remainder > 0 {
remainder -= 1;
1
} else {
0
};
ranges.push((
[from, from, from, from, from + 1].clone(),
[to, to, to, to, to].clone(),
));
from = to;
}
ranges[0].0[4] = b'a';
ranges.clone()
}
fn decode(string: &str) -> [u8; 256 / 8] {
let mut result = [0; 256 / 8];
let vec = Vec::from_hex(string).unwrap();
for i in 0..result.len() {
result[i] = vec[i];
}
result.clone()
}</syntaxhighlight>
{{out}}
<pre>
apple 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
zyzzx 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
mmmmm 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
</pre>
=={{header|Scala}}==
Scala has an excellent implementation of parallel collections, which allow you to take advantage of parallel processing with only minor modifications to your code.
This example converts the collection of candidate strings into a ParVector as soon as possible, speeding up both the final step to generating the candidates and the search.
<syntaxhighlight lang="scala">import java.security.MessageDigest
import scala.collection.parallel.immutable.ParVector
object EncryptionCracker {
def main(args: Array[String]): Unit = {
val hash1 = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
val hash2 = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
val hash3 = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
val charSet = ('a' to 'z').toVector
val num = 5
for(tmp <- List(hash1, hash2, hash3)){
println(tmp)
crack(tmp, charSet, num) match{
case Some(s) => println(s"String: $s\n")
case None => println("Failed\n")
}
}
}
def crack(hash: String, charSet: Vector[Char], num: Int): Option[String] = {
val perms = charSet
.flatMap(c => Vector.fill(num)(c)).combinations(num) //Generate distinct sets of letters
.to(ParVector) //Convert to ParVector
.flatMap(_.permutations.map(_.mkString)) //Finish generating candidates
perms.find(str => getHash(str).equalsIgnoreCase(hash)) //Search for a matching string
}
def getHash(str: String): String = {
val digester = MessageDigest.getInstance("SHA-256")
digester.digest(str.getBytes("UTF-8")).map("%02x".format(_)).mkString
}
}</syntaxhighlight>
An unfortunate side-effect of jumping straight into a ParVector, though, is that the entire list of candidate strings must be computed before attempting to find a match. This means that even modestly large charsets and/or strings can make the memory usage and runtime blow up.
To solve that issue, this next example implements lazy lists. A lazy list is evaluated as needed, meaning you can generate the list of candidates as you check them. In order to still take advantage of parallel processing, this code takes fixed-size chunks off the front of the LazyList and converts them to ParVectors, repeating until either a match is found or the LazyList is empty.
Notice that def is used in place of val when working with the list of candidates. This is because val holds onto the head, which means it would fill up memory over time with the backlog of candidates already checked. Using def lets the program discard candidates after they are checked.
<syntaxhighlight lang="scala">import java.security.MessageDigest
import scala.annotation.tailrec
import scala.collection.parallel.immutable.ParVector
object EncryptionCracker {
def main(args: Array[String]): Unit = {
val hash1 = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
val hash2 = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
val hash3 = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
val charSet = ('a' to 'z').toVector
val len = 5
val num = 1000000
for(tmp <- List(hash1, hash2, hash3)){
println(tmp)
crackLazy(tmp, charSet, len, num) match{
case Some(s) => println(s"String: $s\n")
case None => println("Failed\n")
}
}
}
def crackLazy(hash: String, charSet: Vector[Char], len: Int, num: Int): Option[String] = {
@tailrec
def getMatch(lst: LazyList[String]): Option[String] = {
def hit = lst.take(num).to(ParVector).find(str => getHash(str).equalsIgnoreCase(hash))
def nxt = lst.drop(num)
hit match{
case Some(str) => Some(str)
case None if nxt.nonEmpty => getMatch(nxt)
case None => None
}
}
def perms = charSet
.flatMap(Vector.fill(len)(_))
.combinations(len)
.flatMap(_.permutations.map(_.mkString)).to(LazyList)
getMatch(perms)
}
def getHash(str: String): String = {
val digester = MessageDigest.getInstance("SHA-256")
digester.digest(str.getBytes("UTF-8")).map("%02x".format(_)).mkString
}
}</syntaxhighlight>
As a final example, we can clean this code up with some method chaining and currying to get this:
<syntaxhighlight lang="scala">import java.security.MessageDigest
import scala.collection.parallel.immutable.ParVector
object EncryptionCracker {
def main(args: Array[String]): Unit = {
val hash1 = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad"
val hash2 = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b"
val hash3 = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
val cracker: String => Option[String] = crackLazy('a' to 'z', 5, 1000000)
for(tmp <- Seq(hash2, hash1, hash3)){
println(s"$tmp")
cracker(tmp) match{
case Some(s) => println(s"String: $s\n")
case None => println("Failed\n")
}
}
}
def getHash(str: String): String = MessageDigest
.getInstance("SHA-256")
.digest(str.getBytes("UTF-8"))
.map("%02x".format(_)).mkString
def crackLazy(charSet: Seq[Char], len: Int, num: Int)(hash: String): Option[String] = charSet
.flatMap(Vector.fill(len)(_)) //Duplicate characters so they can be used any number of times
.combinations(len) //Generate distinct sets of characters
.flatMap(_.permutations.map(_.mkString)) //Generate all permutations for each character set
.grouped(num) //Partition into bite-size chunks
.map(_.to(ParVector).find(str => getHash(str) == hash)) //Convert each chunk into a ParVector and search it
.collectFirst{case Some(res) => res} //Get the first hit if one is found
}</syntaxhighlight>
{{out}}
<pre>
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
String: zyzzx
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
String: apple
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
String: mmmmm
</pre>
=={{header|Sidef}}==
{{trans|Perl}}
<syntaxhighlight lang="ruby">func invert_sha256(hash) {
var letters = @('a'..'z')
var job = func (prefix, hash) {
variations_with_repetition(letters, 4, {|*a|
var s = join('', prefix, a...)
return s if (s.sha256 == hash)
})
return nil
}
letters.map {|prefix|
job.ffork(prefix, hash)
}.each {|f|
with (f.wait) { return _ }
}
}
var tests = %w(
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
)
tests.each {|t|
var phrase = invert_sha256(t)
say "#{t} : #{phrase}"
}</syntaxhighlight>
{{out}}
<pre>
1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad : zyzzx
3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b : apple
74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f : mmmmm
</pre>
=={{header|Swift}}==
<syntaxhighlight lang="swift">import Foundation
import CryptoKit
extension String {
func hexdata() -> Data {
Data(stride(from: 0, to: count, by: 2).map {
let a = index(startIndex, offsetBy: $0)
let b = index(after: a)
return UInt8(self[a ... b], radix: 16)!
})
}
}
DispatchQueue.concurrentPerform(iterations: 26) { (a) in
let goal1 = "1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad".hexdata()
let goal2 = "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b".hexdata()
let goal3 = "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f".hexdata()
var letters: [UInt8] = [(UInt8)(a + 97), 0, 0, 0, 0]
for b: UInt8 in 97...122 {
letters[1] = b
for c: UInt8 in 97...122 {
letters[2] = c
for d: UInt8 in 97...122 {
letters[3] = d
for e: UInt8 in 97...122 {
letters[4] = e
let digest = SHA256.hash(data: letters)
if digest == goal1 || digest == goal2 || digest == goal3 {
let password = String(bytes: letters, encoding: .ascii)!
let hexhash = digest.map { String(format: "%02x", $0) }.joined()
print("\(password) => \(hexhash)")
}
}
}
}
}
}</syntaxhighlight>
=={{header|Visual Basic .NET}}==
{{trans|C#}}
<syntaxhighlight lang="vbnet">Imports System.Text
Module Module1
Function Matches(a As Byte(), b As Byte()) As Boolean
For i = 0 To 31
If a(i) <> b(i) Then
Return False
End If
Next
Return True
End Function
Function StringHashToByteArray(s As String) As Byte()
Return Enumerable.Range(0, s.Length / 2).Select(Function(i) CType(Convert.ToInt16(s.Substring(i * 2, 2), 16), Byte)).ToArray
End Function
Sub Main()
Dim h1 = StringHashToByteArray("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad")
Dim h2 = StringHashToByteArray("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
Dim h3 = StringHashToByteArray("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
Parallel.For(0, 26, Sub(a As Integer)
Dim sha = Security.Cryptography.SHA256.Create()
Dim password(4) As Byte
Dim hash As Byte()
password(0) = 97 + a
password(1) = 97
While password(1) < 123
password(2) = 97
While password(2) < 123
password(3) = 97
While password(3) < 123
password(4) = 97
While password(4) < 123
hash = sha.ComputeHash(password)
If Matches(h1, hash) OrElse Matches(h2, hash) OrElse Matches(h3, hash) Then
Console.WriteLine(Encoding.ASCII.GetString(password) + " => " + BitConverter.ToString(hash).ToLower().Replace("-", ""))
End If
password(4) += 1
End While
password(3) += 1
End While
password(2) += 1
End While
password(1) += 1
End While
End Sub)
End Sub
End Module</syntaxhighlight>
{{out}}
<pre>mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad</pre>
=={{header|Wren}}==
{{libheader|Wren-crypto}}
{{libheader|Wren-fmt}}
Wren supports concurrency by way of co-operatively scheduled fibers and, as required by the task description, the work has been divided up between 26 fibers with each fiber taking a different initial letter.
However, from an execution speed viewpoint, there is no point in doing so because Wren's VM is single threaded and can only run one fiber at a time. As it takes around 50 seconds on my machine to process a single initial letter (456,976 calls to sha256) this means that an overall runtime of about 22 minutes is needed to find the passwords corresponding to the 3 hashes.
Currently, parallel calculations are impossible in Wren-cli. However, if Wren is being embedded, it might be possible for a suitable host to run several Wren VM's in parallel and divide a task up between them to improve execution time.
<syntaxhighlight lang="wren">import "./crypto" for Sha256
var hashes = [
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
"3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"
]
var findHash = Fn.new { |i|
var bytes = List.filled(5, 0)
var r = 97..122
bytes[0] = i
for (j in r) {
bytes[1] = j
for (k in r) {
bytes[2] = k
for (l in r) {
bytes[3] = l
for (m in r) {
bytes[4] = m
var d = Sha256.digest(bytes)
for (hash in hashes) {
if (hash == d) {
var s = bytes.map { |b| String.fromByte(b) }.join()
System.print("%(s) => %(d)")
hashes.remove(hash)
if (hashes.count == 0) return
}
}
}
}
}
}
}
for (i in 0..25) {
var fib = Fiber.new(findHash)
fib.call(97+i)
}</syntaxhighlight>
{{out}}
<pre>
apple => 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
mmmmm => 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
zyzzx => 1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad
</pre>
=={{header|zkl}}==
Line 165 ⟶ 2,539:
Uses the message hashing extension library (DLL).
{{trans|==C sharp|C#}}
<
var [const] gotEm=Atomic.Int(); // global signal for all threads
Line 185 ⟶ 2,559:
}
}
}</
<
"74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f",
"1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad");
Line 200 ⟶ 2,574:
s+=n;
}
hashes2go.waitFor(0); // wait until all cracked, just exit, OS kills threads</
<pre>
mmmmm --> 74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f
| |||