Συνδεδεμένοι SHA256 Γεννήτρια Hash

So I need to generate a Sha256 password in Objective-C, and can't figure out for the life of me how to do it! Is there something easy I'm just missing?

I've tried implementing the following method (which was written for iPhone, but I figured maybe it'd work cross-platform, as some Objective-C code does)

-(NSString*)sha256HashFor:(NSString*)input{    const char* str = [input UTF8String];    unsigned char result[CC_SHA256_DIGEST_LENGTH];    CC_SHA256(str, strlen(str), result);    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];    for(int i = 0; i<CC_SHA256_DIGEST_LENGTH; i++)    {        [ret appendFormat:@"%02x",result[i]];    }    return ret;}

But that just spat out errors about CC_SHA256_DIGEST_LENGTH being an undeclared identifier.

I am using hashlib library in python and Digest::SHA256.hexdigest library in ruby

With python I tried,

import hashlibhasher = hashlib.sha256()hasher.update("xyz")hasher.digest()hash = hasher.hexdigest()print hash

output : 3608bca1e44ea6c4d268eb6db02260269892c0b42b86bbf1e77a6fa16c3c9282

With Ruby I tried,

require 'digest'hasher   = Digest::SHA256.digest "xyz"hash   = Digest::SHA256.hexdigest(hasher)

output : "18cefdae0f25ad7bb5f3934634513e54e5ac56d9891eb13ce456d3eb1f3e72e8"

Can anyone help me to understand why there is a difference? how can I get the same value as python ?

I would like to translate Java code password hashing used in Blynk IoT software that I can use in Express.js app. Thanks for any help!

Java code:https://www.onlinegdb.com/HJe19lyFB

import java.nio.charset.StandardCharsets;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Base64;public class Main {    public static void main(String[] args){        System.out.println(makeHash("password","mail@gmail.com"));     }    private static final String SHA_256 = "SHA-256";    private Main() {        try {            MessageDigest.getInstance(SHA_256);        } catch (NoSuchAlgorithmException e) {        }    }    public static String makeHash(String password, String salt) {        try {            MessageDigest md = MessageDigest.getInstance(SHA_256);            md.update(password.getBytes(StandardCharsets.UTF_8));            byte[] byteData = md.digest(makeHash(salt.toLowerCase()));            return Base64.getEncoder().encodeToString(byteData);        } catch (Exception e) {            //ignore, will never happen.        }        return password;    }    private static byte[] makeHash(String val) throws NoSuchAlgorithmException {        return MessageDigest.getInstance(SHA_256).digest(val.getBytes(StandardCharsets.UTF_8));    }}

Currently not working solution:https://repl.it/@patryk0493/blynk-password-hashing

const btoa = require('btoa');var util = require('util');const KJUR = require('jsrsasign');const password = 'password';const email = 'mail@gmail.com';const options = {"alg": "sha256", "prov": "cryptojs"}makeHash = (str) => {  const md = new KJUR.crypto.MessageDigest(options);  return md.digestString(new util.TextEncoder().encode(str.toLowerCase()))}const md = new KJUR.crypto.MessageDigest(options);md.updateString(new util.TextEncoder().encode(password));const byteData = md.digest(makeHash(email.toLowerCase()));const base64 = btoa(byteData)console.log(base64);

I am currently working with a real-time embedded system using custom Linux 4.4.115 provided by our vendor. Out of the box, it supports MD5 hashing, but we have a requirement of SHA256. The hashing is purely for user account login.

I was able to install OpenSSL on the box. I can create the SHA256 hash of a password but I am unsure about how to set it as a user account password. I've tried putting the hashed password in /etc/passwd but that obviously doesn't work. So after research I discovered I need to put it in the /etc/shadow file. This file does not exist on this system which means the Shadow package is not installed.

I went to install the Shadow package but I've run out of space. Is there anyway that I can use this SHA256 password without the /etc/shadow file? Recompiling the kernel is a last resort, we'd like to avoid that.

I got a problem. I want to get the sha256 hash using image on javascript but my sha256 it is incorrect.

This is my code:

<button onclick="onSuccess()">Click me</button><script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.js"></script><script>    function onSuccess(imageURI) {        var hash = CryptoJS.SHA256("C:\\Users\\fjolmedo\\Desktop\\_IRA1591.jpg");        console.log([hash].join(''));    }</script>

But the result is: f3ccce7bbec0d8b3b4c6f967b2e405609b7fe691309306271bd41e22ab420aa8 and the good code should be: bedce3a32c3c2350dbcb220ed21aca171dfe57abdf68bf9ba878c0c447214742

What im doing wrong? and where is the error?