Digest string : Message Digest « Security « Java

1. Java
2. Security
3. Message Digest

Digest string

   
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;

public class Utils {
  public static String digest(String token) throws GeneralSecurityException, IOException {
    MessageDigest sha1 = MessageDigest.getInstance("SHA1");
    return byteArrayToHexStr(sha1.digest(token.getBytes("UTF-8")));
  }

  private static String byteArrayToHexStr(byte[] data) {
    char[] chars = new char[data.length * 2];
    for (int i = 0; i < data.length; i++) {
      byte current = data[i];
      int hi = (current & 0xF0) >> 4;
      int lo = current & 0x0F;
      chars[2 * i] = (char) (hi < 10 ? ('0' + hi) : ('A' + hi - 10));
      chars[2 * i + 1] = (char) (lo < 10 ? ('0' + lo) : ('A' + lo - 10));
    }
    return new String(chars);
  }
}

   
    
    
  

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