sha1

问题 I've got a ASP.NET 5 RC1 (soon to be ASP.NET Core) Web Application project. It needs to compute SHA1 hashes. Various SHA1 subclasses are available and build under DNX 4.5.1, but there doesn't seem to be any available implementation under DNX Core 5.0. Do I have to add a reference to bring that code in, or is it simply not available for .NET Core yet? According to this article: .NET Core consists of a set of libraries, called “CoreFX”, and a small, optimized runtime, called “CoreCLR”. Sure

问题 If this were possible to do prior to posting a form, it may save me having to upload the file to my server... 回答1: To do that you would have to load the file's binary information into JavaScript. Which is not possible. But here's an implementation of SHA1 in JavaScript. 回答2: Actually you can read the contents of a client-side file now, as long as it's chosen in a file upload field and you are using Firefox. See the input.files array. You can then indeed hash it, although it might be rather

问题 Calculating SHA-1 hashes in Java and C# I'm trying to replicate the logic of a Java application within a C# application. Part of this involves generating an SHA-1 hash of a password. Unfortunately I can't get the same results from Java and C#. C# Output : 64 0a b2 ba e0 7b ed c4 c1 63 f6 79 a7 46 f7 ab 7f b5 d1 fa Java Output: 164 10a b2 ba e0 17b ed c4 c1 163 f6 179 a7 146 f7 ab 17f b5 d1 fa To try and figure out what is happening I've been using the Debugger in Eclipse and Visual Studio. 1.

问题 How do I check if my SSL Certificate is using SHA1 or SHA2, from the commandline? And yes, i this is similar to this, but i need a cli-tool and i want to understand how it is done. 回答1: after googling for quite some time i came up with the following snippet (unix): openssl s_client -connect <host>:<port> < /dev/null 2>/dev/null | openssl x509 -text -in /dev/stdin | grep "Signature Algorithm" windows (thanx Nick Westgate, see below) certutil -dump cacert.pem | find "Algorithm" 回答2: I know the

问题 Ill start by saying I dont know anything about c++ and I googled, there is nothing that can make me understand how to use SHA1 in C++. found this one though Objective C: SHA1 but its about objective c im not sure it is the same. I need to do the following: I habve a lot of files, i compile them by doing ./make.sh and in one file called server.cpp I need to SHA1 info_hash thats inserted in this part: Csql_query(m_database, "insert into @files (info_hash, mtime, ctime) values (?, unix_timestamp

问题 Ill start by saying I dont know anything about c++ and I googled, there is nothing that can make me understand how to use SHA1 in C++. found this one though Objective C: SHA1 but its about objective c im not sure it is the same. I need to do the following: I habve a lot of files, i compile them by doing ./make.sh and in one file called server.cpp I need to SHA1 info_hash thats inserted in this part: Csql_query(m_database, "insert into @files (info_hash, mtime, ctime) values (?, unix_timestamp

问题 Is there an x where SHA1(x) == x ? I'm looking for a proof or a strong argument against it. 回答1: The same arguments apply here as for the question Is there an MD5 fixed point? I.e. for a randomly chosen function it is about 63%. 回答2: Read about fixed point attack on this wiki entry One-way compression function - Davies-Meyer Most widely used hash functions, including MD5, SHA-1 and SHA-2 use Merkle-Damgård construction. 来源： https://stackoverflow.com/questions/2340524/is-there-any-x-for-which

问题 New to JS, I'm also learning to use crypto libraries. I don't understand why signing/encoding the same message with the same secret yields differing results. I'm using jsSHA 1.3.1 found here, and CryptoJS 3.0.2 described here trying to create a base64 sha-1 encoded hmac signature. Here's the code: In html... <script src="lib/jsSHA/src/sha1.js"></script> <script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/hmac-sha1.js"></script> And in js... var message = "shah me"; var

问题 Is the security of the HMAC based on SHA-1 affected by the collisions attacks on SHA-1? 回答1: The security implications of HMAC are described in detail in the security section of the RFC. In a nutshell, a very strong attack indeed is required before the security of the HMAC is threatened; the existing collision attacks on SHA-1 certainly don't constitute such. HMAC is specifically designed to make attacks difficult, and ordinary collision attacks won't generally suffice: The security of the

问题 What is "salt" when relating to MYSQL sha1? I have no idea what salt is when relating to sha1 password encryptions? Can someone please explain what it is? 回答1: A salt is a value that is added to a password (or other secret) which you want to hash one way. This means it could be before, after, or somewhere inside the password, as long as its position and value is consistent for a given supplied password. What this does is it mitigates dictionary attacks - basically dictionaries of common