Questions tagged [message-digest]
131 questions
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1 answer
Message Digest in swift
I need to generate Message Digest in Swift with SHA-256 variant with SALT. I am using CryptoSwift library in Swift for all the encryption/decryption. Now I am stuck at generating Message Digest which matches with Java code in Android as below. If…
Dhaval H. Nena
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MessageDigestMessage Digest returning different key after first digest
Here is how I initialize MessageDigest
private static MessageDigest messageDigest;
public static final String SALT_DO_NOT_CHANGE = "somesalt";
static {
try {
messageDigest = MessageDigest.getInstance("SHA-512");
…
Viraj Nalawade
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1 answer
How to get an int type hash using message digest for bloom filters
I am trying to implement a bloom filter in java and one type of hash needs to be using the message digest. During the add method the other hashes I have created are used to set the index of the bitset to true. I need to create a hash using message…
slb
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0 answers
Bad Padding Exception
I am trying a program to first encrypt and decrypt a string and in between encoding it into 64base and then decoding it into 64base(this is required). But I am getting the below error. What is the possible fix?
Exception in thread "main"…
Ayush Chaurasia
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Generate hash from chunked file
I'm programming a web service for uploading long files. The client sends the chunks whenever it wants. I need to calculate the hash of this file while theese chunks are received.
I've seen that you can do somenthing like this:
byte[] buf = new…
Enrique de Miguel
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2 answers
Why do BouncyCastle Keccak sha-384 and MessageDigest sha-384 have different output?
Simple example hashing an array of just one byte:
import java.security.MessageDigest;
import java.util.Arrays;
import org.bouncycastle.jcajce.provider.digest.Keccak;
public class Program {
public static void main(String[ ] args) {
//…
Roman Semko
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Use SHA512Digest in cd1 like using MessageDigest in java
i am trying to convert a java api to cd1 api of encryption...
i have in java this method:
private static byte[] encodePassword(String password,String salt) throws UnsupportedEncodingException
{
String…
Zain Elabidine
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1 answer
Package in java 's equivalent in codenameone
i have a java api that uses those packages:
import java.security.MessageDigest;
import java.security.SecureRandom;
import java.util.Base64;
i find the equivalence of:
the second(import javabc.SecureRandom;)
and
the third(import…
Zain Elabidine
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0 answers
MD5 algorithm implemented in python
So I am trying to implement the MD5 algorithm in Python. I've read reams of sources, the original document from ietf by Rivest, and I still have some things I don't get:
So this is the code:
import math
T=[]
for i in range(64):
…
user9686271
1
vote
1 answer
How to use update Method of Message Digest Class
I'm working on a data encryption project and just wanted to ask how to use the method update of message digest class.
In a code snippet of MD5 implementation, this was written.
import java.security.MessageDigest;
import java.util.*;
class MD5{
…
Saurabh Kumar
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1 answer
Method Digest on Main UI Thread
I would like to compute the sha256 digest on a string. Is it safe to compute the hash on the main ui thread? Or do i have to run this in the background?
prostock
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How to convert Java MessageDigest with two update statements to C#
How can I convert this Java code to C#?
byte[] a = ...some byte array...;
byte[] b = ...some byte array...;
MessageDigest m_Hash = MessageDigest.getInstance("SHA-1");
m_Hash.update(a);
m_Hash.update(b);
byte[] ub =…
Brian Rice
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Difference between Merkle–Damgård and sponge-function used in KECCAK
Hello to the nice Stackoverflow community!
I have difficulties understanding the difference between the Merkle–Damgård construction and the sponge-function used in KECCAK.
The Merkle–Damgård Construction takes in the message-blocks iteratively, but…
tietze111
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MD5 hashes different values with same input
I have the following Scala function:
import java.security.MessageDigest
def md5(s: String) = MessageDigest.getInstance("MD5").digest(s.getBytes).toString()
When I encrypt the same string, I always get different results, what could be the problem?…
ps0604
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BigInteger always is same
I am trying to create a unique name for each file you upload to my server from my Jar. I am using the MessageDigest MD5 class to create, but unfortunately I always get the same name.
BufferedImage buffImg =…
hateful
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