對於某個程式實現方法的好奇.抱著學習的心態.
研究了一下.得出了以下的結論.順道筆記一下.
測試金鑰方法 (TOKEN)
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| curl -I "http://mobile.u****x.hk/mobile?language=en_US&mobileToken=[TOKEN]"
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生成金鑰代碼 (TOKEN)
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| import java.util.Date;
class Th0z {
public static void main(String args[]) {
String encryptKey = "Zs****J**t*****e";
String targetVesion = "1.0.1";
StringBuilder temp = new StringBuilder();
temp.append(new RandomString(6).nextString()).append("_");
temp.append(targetVesion).append("_");
temp.append(Long.valueOf(new Date().getTime()));
System.out.println("Content: " + temp.toString());
System.out.println("Token : " + Encryptor.encryptByKey(
temp.toString(), Encryptor.generateKey(encryptKey)
));
}
}
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加密和解密工具
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| import java.util.Base64;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
class Encryptor {
public static String encryptByKey(String content, Key theKey) {
try {
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, theKey);
return Base64.getEncoder().encodeToString(cipher.doFinal(
content.getBytes("UTF-8"))
);
}catch(Exception e) {}
return content;
}
public static Key generateKey(String content) {
try {
byte[] contentBytes = content.getBytes("UTF-8");
SecretKeySpec secretKeySpec = new SecretKeySpec(
contentBytes, 0, contentBytes.length, "AES"
);
return secretKeySpec;
}catch (Exception localException) {}
return null;
}
}
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生成隨機數工具
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| import java.util.Random;
public class RandomString {
private static char[] symbols;
private final char[] buf;
private final Random random = new Random();
static {
StringBuilder temp = new StringBuilder();
for (char ch = '0'; ch <= '9'; ++ch) temp.append(ch);
for (char ch = 'a'; ch <= 'z'; ++ch) temp.append(ch);
symbols = temp.toString().toCharArray();
}
public RandomString(int theLength) {
if (theLength < 1) {
throw new IllegalArgumentException(
"length < 1: " + theLength
);
}else{
buf = new char[theLength];
}
}
public String nextString() {
for (int idx = 0; idx < buf.length; ++idx)
buf[idx] = symbols[random.nextInt(symbols.length)];
return new String(buf);
}
}
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