def __init__(self, alg=None):
if alg is not None:
self.name = alg
self.__hash = MessageDigest.getInstance(alg)
def calc_md5(text):
md5 = MessageDigest.getInstance("md5")
md5.update(text)
return jarray_to_hex_s(md5.digest()) #Aqui reside la unica complejidad
def __init__(self, alg=None):
if alg is not None:
self.name = alg
self.__hash = MessageDigest.getInstance(alg)
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class Lab12 {
static String hashString(String message, String algorithm) {
// compute the hash value of message using algorithm and return a string representation of it
byte[] hashedBytes = null; // will store the hash value of message
try {
// instantiate the specified algorithm
// it may not exist, thus the try-catch
MessageDigest digest = MessageDigest.getInstance(algorithm);
// compute the hash value of the message
hashedBytes = digest.digest(message.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
e. printStackTrace();
}
// convert hash value (in byte[]) to a hex String and return result
return bToH(hashedBytes);
} // hashString()
static String bToH(byte[] value) {
// converts value to a String of hex digits
StringBuilder sb = new StringBuilder(value.length*2);
