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Questions tagged [message-digest]

131 questions
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Chilkat message ID generation methodology?

The Chilkat proprietary email API concocts message IDs with formats like this: CHILKAT-MID-862e2615-b706-5239-b049-38ded70b2a77 How is that value calculated? Is that a standard unix digest of some kind, or is it an unknown code?
Tyler Durden
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Java Cryptography/Security Error

I have some code below, which should create a hash of a message using SHA1, print the hash, encrypt the message using a RSA algorithm, print out the encrypted message, then decrypt the message and print the hash again. The fist and third print…
ChrisDLFC
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Java messageDigest funky output

I'm using Java's MessageDigest to do a hashing project. I want to create collisions with hashes made by randomly generated strings. I have verified that my strings are truly random. When I output the digest however it always begins with "[B@" for…
discodane
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Message Digest java

I was not aware of the MessageDigest class before. I am now trying to understand a segment of code and the documentation is not helping me much. MessageDigest digest = Crypto.sha256(); digest.update(last.getSign()); byte[] SignHash =…
Paramar
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Encrypting passwords in database by using SHA-256 algorithm

I'd would like to encrypt in a database the password by using SHA-256 algorithm. I have made some researches and I found out I should use MessageDigestclass to encrypt properly a string object. The problem is how should revert the hash function to…
Mazzy
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Stream Closed Error Groovy

Hi I am trying to connect FTP and read a file and generate md5 checksum value for that file, but I am facing Stream Closed error. Here is my code. import java.io.FileInputStream; import java.security.MessageDigest; import…
Shashank Cool
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signature verification process in java security

I want to send a original_message between two person. let say Alice and Bob, and I want to know if these steps are correct for verification of the signature or not Alice hash the original_message with her PrivateKey -> h(m) Alice cipher the hashed…
Nima Soroush
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converting string to md5 gives add number of digits

I am trying to convert a String to its MD5 representation with this code: public static void main(String[] args) throws NoSuchAlgorithmException { String s = "oshai"; MessageDigest m = MessageDigest.getInstance("MD5"); …
oshai
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What does resetting MessageDigest do?

Here is the code I'm talking about: md.reset(); What does the reset() method do to the MessageDigest object? Why is it necessary?
user3055593
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Bouncy Castle Getting content from signature and X509Certificate

I am very new to Bouncy Castle.I want to know is there any way using Bouncy Castle API that i can get original content if i only have signature using X509Certificate with public key.I am not finding any way as we have only public key.We don't have…
Swapnil
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Regenerating SHA-1 hash not matching stored database hash

I'm trying to implement SHA1 password hashing with key-stretching combined with a UUID as a salt. The salt is stored as a column in my usersTable inside the database backend, thus each user will be generated their own unique salt. My problem is that…
Nebri
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Java message digest [MD5] not producing expected hash

I am trying to generate an MD5 hex hash using the following code: String password = "password"; MessageDigest digest = MessageDigest.getInstance("MD5"); ByteArrayInputStream bais = new ByteArrayInputStream(password.getBytes()); int size =…
carlspring
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url safe base64 in MySQL

Is MySQL's TO_BASE64 URL safe? Using java, I can write the following code: import org.apache.commons.codec.binary.Base64; public class Main { public static void main(String[] args) { String text = "SomeText"; byte[] input =…
pshah
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DigestInputStream -> compute the hash without slowdown when the consumer part is the bottleneck

I have an application that needs to transfer files to a service like S3. I have an InputStream of that incoming file (not necessarily a FileInputStream), and I write this InputStream to a multipart request body that is represented by an…
Sebastien Lorber
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SHA_256 functions corrupting memory space

I've been trying to use the SHA_256 functions in sha256.h on a FreeBSD 9.1 system but it seems to be corrupting memory space of my program causing all kinds of manic behavior. I wrote up a quick program to just to play with those functions and still…
user1842941
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