Mega Code Archive

 

Categories / Java / Security

 

Generates md5-sums based on a string

import java.security.MessageDigest; import java.security.DigestInputStream; import java.io.InputStream; import java.io.BufferedInputStream; public class MD5Util {     public static String computeMD5(String input) {         MessageDigest digest;         try {             digest = MessageDigest.getInstance("MD5");             digest.update(input.getBytes("UTF-8"));         } catch (Exception e) {             throw new RuntimeException(e);         }         byte[] digestBytes = digest.digest();         StringBuffer hexString = new StringBuffer();         for (byte digestByte : digestBytes) {             hexString.append(Integer.toHexString(0xFF & digestByte));         }         return hexString.toString();     }     public static String computeMD5(InputStream stream) {         MessageDigest digest;         try {             digest = MessageDigest.getInstance("MD5");             DigestInputStream digestStream = new DigestInputStream(stream, digest);             while (digestStream.read() != -1) {                 ; //digest is updating             }         } catch (Exception e) {             throw new RuntimeException(e);         }         byte[] digestBytes = digest.digest();         StringBuffer hexString = new StringBuffer();         for (byte digestByte : digestBytes) {             hexString.append(Integer.toHexString(0xFF & digestByte));         }         return hexString.toString();     } }