sha256 | 易学教程

PHP salt and hash SHA256 for login password

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问题 I've made encrypting of the password in my register script and they are stored in the database, and I have to use them to login, so I would want to use the unencrypted ones to login. I've read some of the threads in here but nothing is helping me. How can I add it in my login.php? The salt is also stored in the database. This is my register.php script for encrypting $hash = hash('sha256', $password1); function createSalt() { $text = md5(uniqid(rand(), TRUE)); return substr($text, 0, 3); }

Excel formula-based function for SHA256 / SHA512 hashing without VBA or macros

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问题 It's the year 2017 and anybody who needs to use hashes should avoid 'broken' ones such as MD5, if security is important. Has anybody found or created a way to do more secure SHA256 or SHA512 hashing in Excel, without using VBA or macros? A spectacular example of this being done before was over 3½ years ago with MD5 (as seen in this SO: MD5 Hash function in excel without using VBA). Reason for avoiding VBA/Macros: Compatibility with mobile devices, such as Excel for iOS. Side Note: The

PBKDF2 with SHA256 on android

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问题 I want to generate a derived hash of a password using PBKDF2 with SHA256. with this SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1") this work but it use SHA1. With SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256") (or SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256","SC") when with spongycastle) i have an error. How can i succeed to generate a hash using PBKDF2WithHmacSHA256? 回答1: If you use version 1.47 or higher of SpongyCastle, you can invoke PBKDF2WithHmacSHA256 directly:

Docker存储驱动之--overlay2

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docker支持多种graphDriver，包括vfs、devicemapper、overlay、overlay2、aufs等等，其中最常用的就是aufs了，但随着linux内核3.18把overlay纳入其中，overlay的地位变得更重，最近也在自己的虚拟机上用overlay2作为docker存储驱动实验了一番，下面来做一个简单的笔记和总结。 docker默认的存储目录是 /var/lib/docker ，下面我们简单打印一下这个目录： drwx------. 2 root root 24 Mar 28 07:13 builder drwx------. 4 root root 92 Mar 28 07:13 buildkit drwx------. 6 root root 4096 Mar 29 10:25 containers drwx------. 3 root root 22 Mar 28 07:13 image drwxr-x---. 3 root root 19 Mar 28 07:13 network drwx------. 17 root root 4096 Mar 30 14:32 overlay2 drwx------. 4 root root 32 Mar 28 07:13 plugins drwx------. 2 root root 6 Mar 30

PHP: openssl_verify not working with ECDSA keys

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问题 I need some help with the following "pseudo" code: <?php $stringToVerify = '50.009781OK101092014125505'; $ECDSA = '3045022100b4b4064158cb12f5b3d902e1e4487e0c6dfafd96b5bb5ab9765fc088e054d67e0220153 f9bb5da20441c68ff0c3e8ba28cfe048e5c3152fc8c890def156cf09d5540'; $publicKey = "-----BEGIN PUBLIC KEY----- MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEaq6djyzkpHdX7kt8DsSt6IuSoXjp WVlLfnZPoLaGKc/2BSfYQuFIO2hfgueQINJN3ZdujYXfUJ7Who+XkcJqHQ== -----END PUBLIC KEY-----"; var_dump(openssl_verify($stringToVerify,

8天入门docker系列 —— 第三天使用aspnetcore小案例熟悉对镜像的操控

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原文: 8天入门docker系列 —— 第三天使用aspnetcore小案例熟悉对镜像的操控　　上一篇我们聊到了容器，现在大家应该也知道了，没有镜像就没有容器，所以镜像对docker来说是非常重要的，关于镜像的特性和原理作为入门系列就不阐述了，我还是通过aspnetcore的小sample去熟悉镜像的操控。一：镜像在哪里这个问题问到点子上了，就好像说肉好吃，那你告诉我哪里才能买的到？ 1. docker官方渠道 docker官方有一个 https://hub.docker.com/ 网址，你能想到和想不到的镜像这上面都有，比如web开发者熟悉的nginx，redis，mongodb等等，而且还告诉你怎么去下载，如下图：接下来你可以通过docker pull nginx 来获取docker hub 上最新的镜像了。 [root@localhost ~]# docker pull nginx Using default tag: latest latest: Pulling from library/nginx 6ae821421a7d: Pull complete da4474e5966c: Pull complete eb2aec2b9c9f: Pull complete Digest: sha256

How to calculate sha256 for large files in PHP

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问题 I would like to ask your assistance on how to calculate sha256 of large files in PHP. Currently, I used Amazon Glacier to store old files and use their API to upload the archive. Initially, I just used small files that cannot reach to MB-sized images. When I tried to upload more than 1MB, the API response said that the checksum I gave to them is different from what they had calculated. Here is my code to upload the file: //get the sha256 using the file path $image = //image path; $sha256 =

C# SHA256 Hashing Different To Python Result

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问题 I'm writing a little program based off of a Python code that I have found. There is a few lines I need help with. It is about hasing a value using SHA256 encryption. The python code is as follows: first = hashlib.sha256((valueOne + valueTwo).encode()).hexdigest() second = hashlib.sha256(str(timestamp) + value).encode()).hexdigest() And when I execute it, my values are as follows: first: 93046e57a3c183186e9e24ebfda7ca04e7eb4d8119060a8a39b48014d4c5172b second:

Centos7——docker入门(笔记)

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docker 入门(笔记) 一、Docker是什么？　　官方原话: Docker provides a way to run applications securely isolated in a container, packaged with all its dependencies and libraries. 　　　　Docker Documentation: https://docs.docker.com/get-started/ 二、Docker应用场景：　　在非常低的额外开销的情况下，打造一个一致性的环境。简化配置代码流水线(Code Pipeline)管理提高开发效率隔离应用整合服务器调试能力Docker 多租户环境快速部署三、Docker改变了什么面向产品：产品交付面向开发：简化环境配置面向测试：多版本测试面向运维：环境一致性面向架构：自动化扩容(微服务) 四、环境准备 [root@localhost ~]# cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) [root@localhost ~]# uname -r 3.10.0-862.11.6.el7.x86_64 五、安装docker [root@localhost ~]# yum install -y

Swift SHA256 encryption returns different encrypted string compare to Objective C

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问题 I am migrating some codes from objective c to swift. I want to encrypt a string with a key using SHA 256 algorithm in swift. But comparing to Objective C implementation swift code returns different encrypted string. Both codes looks same only the syntax is different. Can someone help me get the same result in swift as I used to get in Objective C? Below are the code samples from both languages. Objective C: NSString* key = @"1234567890123456789012345678901234567890123456789012345678901234";