md5

Get duplicate file list by computing their MD5

由 烂漫一生 提交于 2019-12-08 20:48:17
问题 I have a array which contains a files path, I want to make a list a those file which are duplicate on the basis of their MD5. I calculate their MD5 like this: private void calcMD5(Array files) //Array contains a path of all files { int i=0; string[] md5_val = new string[files.Length]; foreach (string file_name in files) { using (var md5 = MD5.Create()) { using (var stream = File.OpenRead(file_name)) { md5_val[i] = BitConverter.ToString(md5.ComputeHash(stream)).Replace("-", "").ToLower(); i +=

How to compare two paragraphs of text?

由 丶灬走出姿态 提交于 2019-12-08 19:57:15
问题 I need to remove duplicated paragraphs in a text with many paragraphs. I use functions from the class java.security.MessageDigest to calculate each paragraph's MD5 hash value, and then add these hash value into a Set . If add() 'ed successfully, it means the latest paragraph is a duplicate one. Is there any risk of this way? Except String.equals() , is there any other way to do it? 回答1: Before hashing you could normalize the paragraphs e.g. Removing punctuation, conversion to lower case and

encrypt password in md5? [duplicate]

由 醉酒当歌 提交于 2019-12-08 14:14:40
问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: Need help… how to add md5 to password field in php? I have got this script to allow users to change their passwords. But am wanting the 'newpassword' to be encrypted into the database with md5. Can anyone tell me how i can change this script to encrypt the 'newpassword' in md5 please? <?php require_once("session.php"); require_once("functions.php"); require('_config/connection.php'); ?> <?php session_start();

When I go to Localhost and try the username and the password it tells me that is an error?

由 两盒软妹~` 提交于 2019-12-08 14:09:05
问题 When I go to Localhost and try the username and the password it tells me that is an error? why? 回答1: It looks entered username/password or both are not matching with the database table my_db. Reasons : Localhost means the db is getting refereed in local. So in your local database under my_db table there is no user exists with the given username and password. May be that data is valid in remote database server. Solution : 1. Take a dump from remote database and put in your localhost so that

.Net C# to PHP Pb with byte[] array & ComputeHash

由 筅森魡賤 提交于 2019-12-08 11:56:08
问题 i have this function in .Net C# and want to do the same in PHP. But i don't understand all C# part and not sure about my code. public static string getMD5Hash(string input) { MD5 mD = new MD5CryptoServiceProvider(); byte[] array = Encoding.UTF8.GetBytes(input); array = mD.ComputeHash(array); StringBuilder stringBuilder = new StringBuilder(); int i = 0; byte[] array2 = array; int length = array2.Length; while (i < length) { stringBuilder.Append(array2[i].ToString("x2").ToLower()); i++; }

What is the process of checking passwords in databases?

由 霸气de小男生 提交于 2019-12-08 10:59:46
问题 I know, this is a simple question, and maybe it is similar to others, but I couldn't find my answer in those, so I`m asking new one. I would like to understand the process of checking passwords in databases. I know they use encryption and hashing algorithms, but I can't understand how they can check those stored values and compare them with user`s passwords provided in input fields to verify them? As I have read here in many answers, for example, you can't detect the MD5 hashed password and

hash collision and appending data

由 梦想与她 提交于 2019-12-08 09:11:27
Assume I have two strings (or byte arrays) A and B which both have the same hash (with hash I mean things like MD5 or SHA1). If I concatenate another string behind it, will A+C and B+C have the same hash H' as well? What happens to C+A and C+B? I tested it with MD5 and in all my tests, appending something to the end made the hash the same, but appending at the beginning did not. Is this always true (for all inputs)? Is this true for all (well-known) hash functions? If no, is there a (well-known) hash function, where A+C and B+C will not collide (and C+A and C+B do not either)? (besides from

Comparing local file with remote file

由 无人久伴 提交于 2019-12-08 06:49:27
问题 I have the following problem: I have a local .zip file and a .zip file located on a server. I need to check if the .zip file on the server is different from the local one; if they are not I need to pull the new one from the server. My question is how do I compare them without downloading the file from the server and comparing them locally? I could create an MD5 hash for the zip file on the server when creating the .zip file and then compare it with the MD5 of my local .zip file, but is there

hash collision and appending data

由 时光毁灭记忆、已成空白 提交于 2019-12-08 04:11:26
问题 Assume I have two strings (or byte arrays) A and B which both have the same hash (with hash I mean things like MD5 or SHA1). If I concatenate another string behind it, will A+C and B+C have the same hash H' as well? What happens to C+A and C+B? I tested it with MD5 and in all my tests, appending something to the end made the hash the same, but appending at the beginning did not. Is this always true (for all inputs)? Is this true for all (well-known) hash functions? If no, is there a (well

Comparing local file with remote file

由 二次信任 提交于 2019-12-08 03:35:31
I have the following problem: I have a local .zip file and a .zip file located on a server. I need to check if the .zip file on the server is different from the local one; if they are not I need to pull the new one from the server. My question is how do I compare them without downloading the file from the server and comparing them locally? I could create an MD5 hash for the zip file on the server when creating the .zip file and then compare it with the MD5 of my local .zip file, but is there a simpler way? Short answer: You can't. Long answer: To compare with the zip file on the server,
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