sha256 | 易学教程

sha256 of locally built docker image

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问题 How do I get the sha256 checksum of an already locally built docker image? I want to use the checksum to annotate a FROM instruction in a derived image: FROM name@sha256:checksum I already tried checksums from docker inspect . Neither the first nor the last of the checksums in the Layers list worked. The one in "Id" did not work. The one in "Parent" did not work. The one in "Container" did not work. The one in "Image" did not work. Some of them I only tried out of desperation to finally find

How to correctly convert TAG value to the right format so that to Verify HMAC?

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问题 I'm working on HMAC generation and verifying to check data integrity. I can correctly generate the MAC value but when sending it through socket to another program for verification, I faced with formatting mismatch. I appreciate your support. Thanks. unsigned char* MAC(unsigned char* key,unsigned char* message) { unsigned char* result; unsigned int result_len = 32; int i; result = (unsigned char*) malloc(sizeof(char) * result_len); result = HMAC(EVP_sha256 (), key , strlen (key), message ,

MySQL使用简单教程

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[root@MiWiFi-R1CM-srv ~]# sed -i.bak '/SELINUX/s/enforcing/disabled/g' /etc/selinux/config #养成习惯，遇到要该重要文件时一定要进行备份 [root@MiWiFi-R1CM-srv ~]# cat /etc/selinux/config config config.bak [root@MiWiFi-R1CM-srv ~]# cat /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three two values: # targeted - Targeted processes are

基于CentOS7.7的实践

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欧气dsfkj 博客园首页新随笔联系订阅管理随笔 - 1 文章 - 0 评论 - 0 基于CentOS7.7的实践安装docker [root@MiWiFi-R1CM-srv ~]# sed -i.bak '/SELINUX/s/enforcing/disabled/g' /etc/selinux/config #养成习惯，遇到要该重要文件时一定要进行备份 [root@MiWiFi-R1CM-srv ~]# cat /etc/selinux/config config config.bak [root@MiWiFi-R1CM-srv ~]# cat /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can

Why does this code hash null?

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问题 The following code passes on the username check, but fails on the password. As you can see, the hashes are echoed, but for some reason, they output e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 , which is the sha256sum of /dev/null . As the password does not seem to echo at all, i can only assume it cannot get the POST, but why? login <form action="dologin" method="post"> Username: <input type="text" name="username"> Password: <input type="password" name="password"> <input

encrypt file with SHA256 using C/C++

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问题 How can I encode a file using sha256 and c/c++ ??? Thanks! 回答1: SHA 256 stands for Secure Hash Algorithm ! It will only produce the hash of a given file . You can't retrieve the original file from a given hash otherwise hash functions are useless. If you want to do encryption/decryption AES would be a better solution. Everything you need is in OpenSSL. 回答2: If you don't know what SHA is for, then you better ask someone who knows this stuff instead of doing it yourself. Even if you use a given

Java 1.4 SHA265 Issue?

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问题 I'm currently supporting a legacy e-commerce application that runs on Java 1.4. I understand that 1.4 does not support SSL certificates signed with SHA256, is this correct and will I have issues establishing connections with other sites requesting the use of this certificate? Are there any known workarounds to solve this issue? 回答1: That's not quite right: SHA-256 (and SHA-384, SHA-512) were introduced in 1.4.2 If there is no option to update you could use bouncycastle as your security

Digital sign with sha256 with c#

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问题 here in Italy, we will need to digitally sign all invoices since January 2019. I found a code that works well with sha-1, but I need to use sha256 as standard. The code below, after successfully detect USB key, and ask me for the certificate to use try to sign "NomeFile" file After and output in "NomeFile".p7m, when the line signedCms.ComputeSignature(signer,false); runs, it happens: 1- if use sha-1 it asks me for the PIN and document is successfully created. 2- if use sha-256 don't ask for

PBKDF2 using SHA 256 in .NET

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问题 I need to update some code that is using the PBKDF2 implementation in .Net, Rfc2898DeriveBytes to hash user credentials. It is my understanding that this function uses SHA-1 under the hood. I need to update the underlying hashing algorithm of the systems password hashing to use SHA-256 (This is a client IT-SEC requirement). Having done some reading it seems it is best practice to continue to to use a Key derivation function, however PBKDF2 doesn't allow you to dictate the algorithm is should

Why is hashlib so faster than other codes for sha256 and how can I get my code close to hashlib performance?

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问题 Bellow is a code that compares hashlib.sha256() to my sha256_test() function which is written in raw python in terms of hash rate performance. from time import time_ns as time import hashlib def pad512(bytes_): L = len(bytes_)*8 K = 512 - ((L + 1) % 512) padding = (1 << K) | L return bytes_ + padding.to_bytes((K + 1)//8, 'big') def mpars (M): chunks = [] while M: chunks.append(M[:64]) M = M[64:] return chunks def sha256_transform(H, Kt, W): a, b, c, d, e, f, g, h = H # Step 1: Looping for t