Answer You can’t. That’s what hashing is about. This is not a API or library limitation but a mathematical one, which is there by design. You need to understand that hashing and encryption/ decryption are two completely different things (which are often used together). Hashing A hash, or to be precise, a cryptographic hash, is the result of a mathematical
Tag: md5
MD5 results are different between DigestUtils and MessageDigest
I have tried to use java.security.MessageDigest or org.apache.commons.codec.digest.DigestUtils to do md5, but there comes out different results. The sample code as below: public static void main( …
How can I generate an MD5 hash in Java?
Is there any method to generate MD5 hash of a string in Java? Answer You need java.security.MessageDigest. Call MessageDigest.getInstance(“MD5”) to get a MD5 instance of MessageDigest you can use. The compute the hash by doing one of: Feed the entire input as a byte[] and calculate the hash in one operation with md.digest(bytes). Feed the MessageDigest one byte[] chunk at