sha1

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Generate a Hash from string in Javascript/jQuery Can anyone suggest a simple (i.e. tens of lines of code, not hundreds of lines) hash function written in (browser-compatible) JavaScript? Ideally I'd like something that, when passed a string as input, produces something similar to the 32 character hexadecimal string that's the typical output of MD5, SHA1, etc. It doesn't have to be cryptographically secure, just

问题 I have a SQL table with usernames and passwords. The passwords are encoded using MessageDigest's digest() method. If I encode a password - let's say "abcdef12" - with MessageDigest's digest() method and then convert it to hexadecimal values, the String is different than if I do the same using PHP's SHA1-method. I'd expect these values to be exactly the same though. Code that is used to encode the passwords: MessageDigest md = MessageDigest.getInstance("SHA-1"); byte[] passbyte; passbyte =

问题 According to various sources, attacks looking for sha-1 collisions have been improved to 2^52 operations: http://www.secureworks.com/research/blog/index.php/2009/6/3/sha-1-collision-attacks-now-252/ What I'd like to know is the implication of these discoveries on systems that are not under attack. Meaning if I hash random data, what are the statistical odds of a collision? Said another way, does the recent research indicate that a brute-force birthday attack has a higher chance of finding

问题 I am looking for a way to compute SHA-1 checksums of very large files without having to fully load them into memory at once. I don't know the details of the SHA-1 implementation and therefore would like to know if it is even possible to do that. If you know the SAX XML parser, then what I look for would be something similar: Computing the SHA-1 checksum by only always loading a small part into memory at a time. All the examples I found, at least in Java, always depend on fully loading the

问题 The SHA1 hashes stored in the tree objects (as returned by git ls-tree ) do not match the SHA1 hashes of the file content (as returned by sha1sum ) $ git cat-file blob 4716ca912495c805b94a88ef6dc3fb4aff46bf3c | sha1sum de20247992af0f949ae8df4fa9a37e4a03d7063e - How does git compute file hashes? Does it compress the content before computing the hash? 回答1: Git prefixes the object with "blob ", followed by the length (as a human-readable integer), followed by a NUL character $ echo -e 'blob 14

问题 The SHA1 hashes stored in the tree objects (as returned by git ls-tree ) do not match the SHA1 hashes of the file content (as returned by sha1sum ) $ git cat-file blob 4716ca912495c805b94a88ef6dc3fb4aff46bf3c | sha1sum de20247992af0f949ae8df4fa9a37e4a03d7063e - How does git compute file hashes? Does it compress the content before computing the hash? 回答1: Git prefixes the object with "blob ", followed by the length (as a human-readable integer), followed by a NUL character $ echo -e 'blob 14

问题 The SHA1 hashes stored in the tree objects (as returned by git ls-tree ) do not match the SHA1 hashes of the file content (as returned by sha1sum ) $ git cat-file blob 4716ca912495c805b94a88ef6dc3fb4aff46bf3c | sha1sum de20247992af0f949ae8df4fa9a37e4a03d7063e - How does git compute file hashes? Does it compress the content before computing the hash? 回答1: Git prefixes the object with "blob ", followed by the length (as a human-readable integer), followed by a NUL character $ echo -e 'blob 14

问题 Is it possible to reverse a sha1? I'm thinking about using a sha1 to create a simple lightweight system to authenticate a small embedded system that communicates over a unencrypted connection. Let's say that I create a sha1 like this with input from a "secret key" and spice it with a timestamp so that the sha will change all the time. sha1("My Secret Key"+"a timestamp") Then I include this sha1 in the communication and the server, that can do the same calculation. And hopefully nobody would

问题 I have a PHP application that has a somewhat decent userbase. Now unfortunately, it has been using sha1($password . $salt) all these years and I really want to ditch that in favor of bcrypt. I have found some nice ways of getting a Blowfish hash, but I am still unsure about the conversion approach that I should use. Here are my options: Option 1 Every time a user logs in, I check if the hash starts with $2. If not, I assume it is sha1, take the password entered by the user, get the bcrypt

问题 I would like to know if we can use the same certificate fingerprint SHA1 in Firebase and for Google Maps API? Before this, I'm using my certificate fingerprint SHA1 for Firebase Sign-In authorization. However, for Google Places API, I have to use a certificate fingerprint SHA1 too. First, I deleted fingerprint SHA1 at Firebase console and add it into Google Places API. Next, I add the fingerprint SHA1 at Firebase,but I'm getting a message saying: An error occurred when attempting to modify an