En esta oportunidad presentamos 2 métodos para proteger los datos en sus desarrollos. Los métodos contienen una llave escrita en duro “qualityinfosolutions” que es la que nos permite Encriptar y luego Desencriptar nuestros datos, si las llaves no coinciden no podrán utilizar ambos métodos por lo que es recomendable manejar esta llave como una variable global.
Librerias:
import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
Método de Encriptación
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
public static String Encriptar(String texto) {
String secretKey = "qualityinfosolutions"; //llave para encriptar datos
String base64EncryptedString = "";
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plainTextBytes = texto.getBytes("utf-8");
byte[] buf = cipher.doFinal(plainTextBytes);
byte[] base64Bytes = Base64.encodeBase64(buf);
base64EncryptedString = new String(base64Bytes);
} catch (Exception ex) {
}
return base64EncryptedString;
}
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
public static String Desencriptar(String textoEncriptado) throws Exception {
String secretKey = "qualityinfosolutions"; //llave para desenciptar datos
String base64EncryptedString = "";
try {
byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher decipher = Cipher.getInstance("DESede");
decipher.init(Cipher.DECRYPT_MODE, key);
byte[] plainText = decipher.doFinal(message);
base64EncryptedString = new String(plainText, "UTF-8");
} catch (Exception ex) {
}
return base64EncryptedString;
}
|
Forma de uso suponiendo que fue creada en la clase utilidades como se muestra a continuación:
Clase AppUtilidades
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
package com.quality;
import com.quality.entidades.Utilidades;
public class AppUtilidades {
public static void main(String[] args) throws Exception {
String encriptado = Utilidades.Encriptar("Esto es una prueba");
System.out.println(encriptado);
String desencriptado = Utilidades.Desencriptar(encriptado);
System.out.println(desencriptado);
}
}
|
Clase Utilidades
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
package com.quality.entidades;
import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class Utilidades {
public static String Encriptar(String texto) {
String secretKey = "qualityinfosolutions"; //llave para encriptar datos
String base64EncryptedString = "";
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plainTextBytes = texto.getBytes("utf-8");
byte[] buf = cipher.doFinal(plainTextBytes);
byte[] base64Bytes = Base64.encodeBase64(buf);
base64EncryptedString = new String(base64Bytes);
} catch (Exception ex) {
}
return base64EncryptedString;
}
public static String Desencriptar(String textoEncriptado) throws Exception {
String secretKey = "qualityinfosolutions"; //llave para encriptar datos
String base64EncryptedString = "";
try {
byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher decipher = Cipher.getInstance("DESede");
decipher.init(Cipher.DECRYPT_MODE, key);
byte[] plainText = decipher.doFinal(message);
base64EncryptedString = new String(plainText, "UTF-8");
} catch (Exception ex) {
}
return base64EncryptedString;
}
}
|
