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Contoh program dari md5

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Ivan Dul
Ivan Dul

This document contains Java code that implements MD5 hashing to encrypt strings. It includes a class called DemoMD5 with a method called MD5 that takes a string as input and returns the encrypted MD5 hash as a hexadecimal string. There is also a main method that prompts the user to enter strings, hashes them using MD5, and allows the user to run the program in a loop until they choose to quit.

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KELOMPOK 6 IVAN JOND JANUARIANTO EMANUEL ARDIDIY OKA BAKTI PRATAMA MUHAMMAD FADDILAH
import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class DemoMD5 { private static String convertedToHex(byte[] data) { StringBuffer buf = new StringBuffer(); for (int i = 0; i < data.length; i++) { int halfOfByte = (data[i] >>> 4) & 0x0F; int twoHalfBytes = 0; do { if ((0 <= halfOfByte) && (halfOfByte <= 9)) { buf.append( (char) ('0' + halfOfByte) ); } else
? buf.append( (char) ('a' + (halfOfByte - 10)) ); } halfOfByte = data[i] & 0x0F; } while(twoHalfBytes++ < 1); } return buf.toString(); } public static String MD5(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException { MessageDigest md; md = MessageDigest.getInstance("MD5"); byte[] md5 = new byte[64]; md.update(text.getBytes("iso-8859-1"), 0, text.length()); md5 = md.digest(); return convertedToHex(md5); } }
? import java.util.Scanner; import java.io.UnsupportedEncodingException; import java.security.NoSuchAlgorithmException; public class Password { public static void main(String[] args) { Scanner scan = new Scanner(System.in); String password = " "; String again = "Y"; while (again.toUpperCase().charAt(0) == 'Y') { System.out.print("Enter string: "); password = scan.nextLine(); try { System.out.println("MD5 string: " + DemoMD5.MD5(password)); } catch (NoSuchAlgorithmException a) { a.printStackTrace(); }
? catch (UnsupportedEncodingException a) { a.printStackTrace(); } System.out.print("nRun again?: "); again = scan.nextLine(); } System.exit(0); } }
? /*===================[output]=================== Enter string: HelloEncrytion MD5 string: 3226f13a86b23a7ef65656703cd9ce5a Run again?: y Enter string: 12345 MD5 string: 827ccb0eea8a706c4c34a16891f84e7b Run again?: Yes Enter string: ThisIsKindOfFun MD5 string: c7cd55c195f83ebfb739960ae8ceb465 Run again?: Ya Enter string: Good Bye In 2010 MD5 string: 855380d7335697f739aae9d88819ec1f Run again?: NOPE ==============================================*/ ?

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Contoh program dari md5

  • 1. KELOMPOK 6 IVAN JOND JANUARIANTO EMANUEL ARDIDIY OKA BAKTI PRATAMA MUHAMMAD FADDILAH
  • 2. import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class DemoMD5 { private static String convertedToHex(byte[] data) { StringBuffer buf = new StringBuffer(); for (int i = 0; i < data.length; i++) { int halfOfByte = (data[i] >>> 4) & 0x0F; int twoHalfBytes = 0; do { if ((0 <= halfOfByte) && (halfOfByte <= 9)) { buf.append( (char) ('0' + halfOfByte) ); } else
  • 3. ? buf.append( (char) ('a' + (halfOfByte - 10)) ); } halfOfByte = data[i] & 0x0F; } while(twoHalfBytes++ < 1); } return buf.toString(); } public static String MD5(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException { MessageDigest md; md = MessageDigest.getInstance("MD5"); byte[] md5 = new byte[64]; md.update(text.getBytes("iso-8859-1"), 0, text.length()); md5 = md.digest(); return convertedToHex(md5); } }
  • 4. ? import java.util.Scanner; import java.io.UnsupportedEncodingException; import java.security.NoSuchAlgorithmException; public class Password { public static void main(String[] args) { Scanner scan = new Scanner(System.in); String password = " "; String again = "Y"; while (again.toUpperCase().charAt(0) == 'Y') { System.out.print("Enter string: "); password = scan.nextLine(); try { System.out.println("MD5 string: " + DemoMD5.MD5(password)); } catch (NoSuchAlgorithmException a) { a.printStackTrace(); }
  • 5. ? catch (UnsupportedEncodingException a) { a.printStackTrace(); } System.out.print("nRun again?: "); again = scan.nextLine(); } System.exit(0); } }
  • 6. ? /*===================[output]=================== Enter string: HelloEncrytion MD5 string: 3226f13a86b23a7ef65656703cd9ce5a Run again?: y Enter string: 12345 MD5 string: 827ccb0eea8a706c4c34a16891f84e7b Run again?: Yes Enter string: ThisIsKindOfFun MD5 string: c7cd55c195f83ebfb739960ae8ceb465 Run again?: Ya Enter string: Good Bye In 2010 MD5 string: 855380d7335697f739aae9d88819ec1f Run again?: NOPE ==============================================*/ ?