Trouble encrypting correctly with AES with a static key
Hi. I'm trying to get JCE to work with the following example using AES in ECB mode (yes, ECB shouldn't be used, but it's what I'm supposed to use): given a clear text String represented by the bytes (in hex)546578746F2070617261207465737465 and a key6573736173656E686165686672616361, the program is supposed to provide the encrypted bytesA506A19333F306AC2C62CBE931963AE7. I used an online encryption service to check for myself if the above is true, and it is. However, I just can't get it to work right in Java:
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
publicclass AESTest{
publicstatic String asHex(byte buf[]){
StringBuffer strbuf =new StringBuffer(buf.length * 2);
int i;
for (i = 0; i < buf.length; i++){
if (((int) buf[i] & 0xff) < 0x10){
strbuf.append("0");
}
strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
}
return strbuf.toString();
}
publicstaticvoid main(String[] args)throws Exception{
String keyString ="Texto para teste";
// 546578746F2070617261207465737465 (Hex)
byte[] key = keyString.getBytes("UTF-8");
System.out.println(asHex(key).toUpperCase());
String clearText ="essasenhaehfraca";
// ZXNzYXNlbmhhZWhmcmFjYQ== (Base64)
// 6573736173656E686165686672616361 (Hex)
byte[] clear = clearText.getBytes("UTF-8");
System.out.println(asHex(clear).toUpperCase());
SecretKeySpec skeySpec =new SecretKeySpec(key,"AES");
// PKCS5Padding or NoPadding
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(clear);
System.out.println(asHex(encrypted).toUpperCase());
}
}
All examples I found generate a key instead of using a static one. Well, I need to use that specific key.
What am I doing wrong? Thank you very much!
Message was edited by:
Magus
