hmac | 易学教程

HMAC C# and JavaScript

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问题 Having trouble getting C# and Javascript to generate the same HMAC: C#: string data = String.Format("{0}{1}{2}{3}{4}{5}", APPId, requestHttpMethod, requestUri, requestTimeStamp, nonce, requestContentBase64String); var secretKeyBytes = Convert.FromBase64String(sharedKey); byte[] signature = Encoding.UTF8.GetBytes(data); using (HMACSHA256 hmac = new HMACSHA256(secretKeyBytes)) { byte[] signatureBytes = hmac.ComputeHash(signature); return (incomingBase64Signature.Equals(Convert.ToBase64String

QuickBlox Session create: Unexpected Signature in Rails App

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问题 I am trying to create QuickBlox session from Rest API using Ruby on Rails. My current implementation: def qb_signin_params timestamp = Time.now.in_time_zone('UTC').to_i nonce = rand.to_s[2..6] signature_string = "application_id=#{QuickBlox_Application_Id}&auth_key=#{QUICKBLOX_Authorization_KEY}&nonce=#{nonce}&timestamp=#{timestamp}" digest = OpenSSL::Digest.new('sha1') signature = OpenSSL::HMAC.hexdigest(digest, signature_string, QUICKBLOX_Authorization_SECRET) params = Hash.new params[

HMAC-SHA256 issue in Shopify oauth (Output does not match)

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问题 I'm trying to publish an app on Shopify marketplace by following this documentation. And I'm stuck on step-3 of the oauth documentation wherein you have to do 'HMAC Signature Validation'. Documentation states that you have to process the string (specified below) through HMAC-SHA256 using app's shared secret key. String = "shop=some-shop.myshopify.com&timestamp=1337178173" I'm trying to implement the steps using Java. Following is gist of the code that I have used. private static final String

URL Signing with HMAC or OpenSSL

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问题 I'm interested in url signing (e.g. http://.../?somearg=value&anotherarg=anothervalue&sig=aSKS9F3KL5xc), but I have a few requirements which have left me without a solution yet. I'll be using either PHP or Python for pages, so I'll need to be able to sign and verify a signature using one of the two. My plan was to use a priv/pub key scheme to sign some data, and be able to verify that the signature is valid, but here's where it gets complicated: The data is not known when the verification is

Time stamp in hMAC authentication

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问题 as restful web api server, we supply our client a clientid and password. I think it is enough for the client to use clientid + hMAC(clientid hashed by password) for the authentication. I have looked through some documents which advise to use Time stamp or even more information for the base string. I just cannot understand the meaning of that. Could any guru help explain what exactly the time stamp would help for preventing attack or anything else? 回答1: The issue is that without a timestamp

Validating JWT signed with hmac-sh256

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问题 I am working on a project to use the Katana OpenID Connect middleware to authenticate with a third party (OpenAM) provider. The provider is signing the JWT with hmac-sh256. When the OpenID middleware is validating the JWT via a call to ValidateToken it is throwing the following exception: {"IDX10503: Signature validation failed. Keys tried: 'System.IdentityModel.Tokens.X509AsymmetricSecurityKey\r\n'.\nExceptions caught:\n 'System.InvalidOperationException: IDX10618: AsymmetricSecurityKey

HMAC changes according to node version (paybox module)

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问题 I am using https://www.npmjs.com/package/paybox and I need to upgrade my node version (from 5.6 to 6+) As you can see below, the generateHMAC creates a hash that differs if I change my version of node. Can you help me understand this, and tell me if it can compromise something (maybe it is OK? several hashes could be OK?) Here is my code snippet: "use strict"; const paybox = require('./node_modules/paybox/lib/paybox.js') let computed_hmac = paybox.generateHMAC({a:12},

Encrypt-then-MAC, how to afterwards add data to HMAC

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问题 I want to include iv and salt in the HMACSHA512 calculation without add then to the encrypted data. At the moment someone could change the iv and a wouldn't noticed that. I chain different streams to ensure Encrypt-then-MAC, later I want to encrypt large files, so this design is necessary. So if I add the the iv and salt to a stream, with e.g. new MemoryStream(iv).CopyTo(hmacStream); the result will contain this data. This is my code so far: private static IHmacAndData EncryptInternal(byte[]

SSL与TLS的区别以及介绍

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作者: hengstart 发布时间: 2014-01-05 13:09 阅读: 131133 次推荐: 30 原文链接 [收藏] 　　SSL：（Secure Socket Layer，安全套接字层），位于可靠的面向连接的网络层协议和应用层协议之间的一种协议层。SSL通过互相认证、使用数字签名确保完整性、使用加密确保私密性，以实现客户端和服务器之间的安全通讯。该协议由两层组成：SSL记录协议和SSL握手协议。　　TLS：(Transport Layer Security，传输层安全协议)，用于两个应用程序之间提供保密性和数据完整性。该协议由两层组成：TLS记录协议和TLS握手协议。　　SSL是Netscape开发的专门用户保护Web通讯的，目前版本为3.0。最新版本的TLS 1.0是IETF(工程任务组)制定的一种新的协议，它建立在SSL 3.0协议规范之上，是SSL 3.0的后续版本。两者差别极小，可以理解为SSL 3.1，它是写入了RFC的。　　SSL (Secure Socket Layer) 　　为Netscape所研发，用以保障在Internet上数据传输之安全，利用数据加密(Encryption)技术，可确保数据在网络上之传输过程中不会被截取。目前一般通用之规格为40 bit之安全标准，美国则已推出128 bit之更高安全标准，但限制出境。只要3.0版本以上之I

Signing a message with hmac and sha256 in dart

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问题 I try to generate a sha256 HMAC using a base64-decoded secret key on a message. I would like to use the dart language. In python, I could do it with the following code: # PYTHON CODE import hmac, hashlib, base64 ... message = 'blabla' secret = 'DfeRt[...]==' secret_b64 = base64.b64decode(secret) signature = hmac.new(secret_b64, message, hashlib.sha256) signature_b64 = signature.digest().encode('base64').rstrip('\n') Here is what I tried with dart: // DART CODE import 'package:crypto/crypto