sha1

问题 I'm trying to verify the signature of a file. I followed these instruction to generate a certificate: // generate a private key with size of 2048 bits openssl genrsa -out private_key.pem 2048 // derive a public key from the above private key openssl rsa -in private_key.pem -out public_key.pem -outform PEM -pubout // iOS will not import PEM encoded data so it needs to be converted to DER encoded data openssl rsa -pubin -inform PEM -outform DER -in public_key.pem -out public_key.der // generate

问题 Continuation from Get twitter public timeline, json+C#, no 3rd party libraries I'm still new to C# and oAuth so please bear with me if I fail to understand anything I've created a C# class named oAuthClass, and these are the variables I currently have: static class oAuthClass { public static void run() { int oauth_timestamp = GetTimestamp(DateTime.Now); string oauth_nonce = PseudoRandomStringUsingGUID(); string oauth_consumer_key = "consumer key here"; string oauth_signature_method = "HMAC

问题 Given two different messages, A and B (maybe 20-80 characters of text, if size matters at all), what is the probability that the MD5 digest of A is the same as the MD5 digest of B and the SHA1 digest of A is the same as the SHA1 digest of B? That is: (MD5(A) == MD5(B)) && (SHA1(A) == SHA1(B)) Assume no malicious intent, i.e., that the messages are not selected with an aim of finding a clash. I just want to know the odds of this happening naturally. I'm thinking the chances are "astronomically

问题 I'm confused as to why the following return separate sHA1s $ perl -MDigest::SHA1 -E'say Digest::SHA1::sha1_hex("http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg");' e1133fa3b7ea0bfb8ffa4d877932ed6c6fa10cef $ echo "http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg" | sha1sum 5c3731e83ae0184ed93b595b9f5604863dd331e6 - Which one is right? Am /I/ doing it wrong? $ perl -MDigest::SHA -E'say Digest::SHA::sha1_hex("http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg")

问题 I'm confused as to why the following return separate sHA1s $ perl -MDigest::SHA1 -E'say Digest::SHA1::sha1_hex("http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg");' e1133fa3b7ea0bfb8ffa4d877932ed6c6fa10cef $ echo "http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg" | sha1sum 5c3731e83ae0184ed93b595b9f5604863dd331e6 - Which one is right? Am /I/ doing it wrong? $ perl -MDigest::SHA -E'say Digest::SHA::sha1_hex("http://i.aultec.com/v/8066/Originals/1FTVX12585NA9832010.jpg")

问题 I cant find how to decode string encoded in sha1. I'm suprised that i can't find simple function in python docs or google doing sha1 decoding. I give up. I need help.. 回答1: SHA1 is a hashing algorithm. Hashing is one-way, which means that you can't recover the input from the output for any non-trivial hash function. A simple example of a one-way hash function would be adding together all the digits of a number. 1234 would hash to 1 + 2 + 3 + 4 = 10 , but so would 4321 , 1900 , 5050 , and many

问题 I'm trying to build a portable class library that generates OAuth urls for other classes/applications to use. This class library using OAuth has to be a portable class library so it can work with different versions of a DropBox API I'm building. Part of this class needs to generate an SHA1 hash to generate the oauth_signature with. I'm aware that portable class library doesn't support System.Security.Cryptography, so is there anyway that this class can generate an SHA1 hash without that class

问题 [ UPDATE ] Oracle just revised the crypto roadmap (https://www.java.com/en/jre-jdk-cryptoroadmap.html), they will not deprecate SHA-1 for codesigning: 2017-03-14 Target date changed from 2017-04-18 to 2017-07-18. Narrowed scope from all SHA-1 usage: only TLS will be affected, *code signing will not not be affected at this time*. This does not affect, in any way, the fine answer I received below, as it will apply, no doubt, in the future. -- Original post: Attempting to run our Webstart

问题 Is it possible to decrypt some string which was earlier encrypted with the SHA-1 algorithm in Java? 回答1: SHA1 is a cryptographic hash function, and the entire point is that you can't undo it. If it was possible to reverse the hash (find the input for a given hash), it wouldn't be useful. If you need to encrypt something and later decrypt it, you should use an encryption function like AES or RSA. However, for very simple inputs it may be possible to crack the hash function by guessing what the

问题 I have generated my SHA1 code from my keystore but when I try to create an OAuth client 2.0, Google game console is giving me the error: "Certificate fingerprint is invalid". Anyone knows why this happens? How do I fix this? 回答1: I've contacted Google Play Developer Support about this issue (I've got a same problem). Here is their answer : Please ensure the key is set to 2048 bit and is valid for at least 25 years. I've tried it, but sadly my debug.keystore is still not getting accepted,