md5

问题 The purpose of this script is to pull md5 checksum from each file of a directory as source and then (I'm working on that also) execute the script on the destination so validate it has copied correctly. #!/usr/bin/env python import os from sys import * import subprocess script, path = argv destination = "./new_directorio/" archivo = "cksum.txt" def checa_sum(x): ck = "md5 %s" % x p = subprocess.Popen(ck, stdout=subprocess.PIPE, shell=True) (output, err) = p.communicate() out = open(archivo,'w'

问题 I have a List that updates every minute based on a Linq query of some XML elements. the xml changes, from time to time. It was suggested to me that I could use Hashcode to determine if any of the strings in the list have changed. I have seen some examples of Md5 hashcode calculations for just a string, but not for a list...could someone show me a way of doing this with a list? I tried something simple like int test = list1.GetHashCode; but the code is the same no matter what is in the list...

问题 all the idea i need to be sure that the file doesn't saved more than one time and don't lose any file because if tow files get the same (md5) the second file will not saved (my goal don't save the same file Twice on hard disk) In other words, if one user upload image and after that another user upload the same image i need to don't save the the second image because it's already exist in the hard disk all of this because i need to save space on my hard disk this is my code it works fine

问题 I have an MD5 alpha-numeric. How can I get the first five characters and last five characters, and put them in one string using PHP ? For example: " aabbc cddeef fgghh " will become "aabbcfgghh". 回答1: First of all - accept your recent answers. You can do this with substr function: $input = 'aabbccddeeffgghh'; $output = substr($input, 0, 5) . substr($input, -5); 回答2: $extract = substr($input,0,5) . substr($input,-5); 回答3: Use substr - http://php.net/manual/en/function.substr.php 回答4: $hash =

问题 I found the ts-md5 package but in the example it has a hashStr method but now it doesn't. Property 'hashStr' does not exist on type Md5 . That error is logged in my console after using that. How can I do that? I tried inject it in constructor constructor(private _md5: Md5) {} and then let a: any = this._md5.hashStr("password"); 回答1: I just checked out the documentation and source code, and the hashStr method doesn't exist on instances of the Md5 class. This means that if you only need to use

问题 I'm using Windows 7. I have tried several times with the debug.keystore with appears in c:\users\YOURUSER.android\ using the command: keytool -list -alias androiddebugkey -keystore c:\Users\YOURUSER\.android\debug.keystore -storepass android -keypass android It gives me a MD5, but then I go to Google MD5 registration page and it sais it is not a valid fingerprint. I searched for more information, and I finally created a new debug.keystore into c:\users\YOURUSER\ to avoid rewriting the

问题 I've been looking for a Classic ASP script that allows me to hash a string using the MD5 algorithm. I need to match this hashed string against the same string in an ASP.NET Page, hashed using .NET's MD5 hashing algorithms. Even though I have found several scripts for Classic ASP that generate the hash, I haven't found one that generates the correct hash using non-English characters (like ñ , for example). Do you know some Classic ASP script that works in this particular case? Note: I have

问题 I am using VSTS 2008 + C# + .Net 3.0. I want to find the most efficient way to calculate the MD5 result for the whole content of a txt file. What is the most efficient solution? 回答1: Something as simple as: using (Stream stream = File.OpenRead(filename)) using (MD5 md5 = MD5.Create()) { return md5.ComputeHash(stream); } Given that there's no way of avoiding reading every byte of the stream, I doubt that you'll find anything significantly more efficient. 来源： https://stackoverflow.com/questions

问题 I have a database of legacy passwords that were salted and hashed using MD5. I would like to update the system so that the data is more secure. The first option is to transition the users to a new hashing scheme (Salt + Scrypt or PBKDF2 HMACSHA256) when they login and deactivate old users after a certain period of time so they have to use the password recovery feature which would automatically update their hash. Another option that would allow me to instantly upgrade everyone would be to take

问题 I want to truncate an md5 hash to about half size. How much does that increase the odds of collisions? if I'm dealing with around 500 000 generations, should I be worried about a collision? what about 1m generations. 回答1: The math you're looking for is on Wikipedia's birthday attack page. We consider the following experiment. From a set of H values we choose n values uniformly at random thereby allowing repetitions. Let p(n; H) be the probability that during this experiment at least one value