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[FEATURE] CryptoHelper

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This commit is contained in:
zaxar163 2019-10-20 18:19:27 +03:00
parent d84b13c319
commit 087e2b5a8c
2 changed files with 55 additions and 1 deletions
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54
LauncherCore/src/main/java/pro/gravit/utils/helper/CryptoHelper.java Normal file
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@ -0,0 +1,54 @@
package pro.gravit.utils.helper;
import java.util.Objects;
import java.util.function.LongSupplier;
public final class CryptoHelper {
public static byte[] encode(byte[] txt, String pKey) {
Objects.requireNonNull(txt);
Objects.requireNonNull(pKey);
byte[] key = SecurityHelper.fromHex(pKey);
byte[] res = new byte[txt.length];
for (int i = 0; i < txt.length; i++)
res[i] = (byte) (txt[i] ^ key[i % key.length]);
return res;
}
public static byte[] decode(byte[] pText, String pKey) {
Objects.requireNonNull(pText);
Objects.requireNonNull(pKey);
byte[] res = new byte[pText.length];
byte[] key = SecurityHelper.fromHex(pKey);
for (int i = 0; i < pText.length; i++)
res[i] = (byte) (pText[i] ^ key[i % key.length]);
return res;
}
public static String randomToken(int depth) {
VerifyHelper.verifyInt(depth, VerifyHelper.POSITIVE, "Depth must be positive");
StringBuilder sb = new StringBuilder(SecurityHelper.TOKEN_STRING_LENGTH*depth);
for (int i = 0; i < depth; i++)
sb.append(SecurityHelper.randomStringToken());
return sb.toString();
}
private CryptoHelper() {
}
public static class StaticRandom implements LongSupplier {
private volatile long rnd;
public StaticRandom(long rnd) {
this.rnd = rnd;
}
@Override
public long getAsLong() {
this.rnd ^= (this.rnd << 21);
this.rnd ^= (this.rnd >>> 35);
this.rnd ^= (this.rnd << 4);
return this.rnd;
}
}
}

2
LauncherCore/src/main/java/pro/gravit/utils/helper/SecurityHelper.java
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@ -485,7 +485,7 @@ public static byte[] decrypt(String seed, byte[] encrypted) throws Exception {
return decrypt(getRawKey(seed.getBytes()), encrypted);
}
public static byte[] HexToByte(String hexString) {
public static byte[] fromHex(String hexString) {
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++) {