Skip to content

bytesToHex function is changed #1230

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Mar 15, 2020
Merged

bytesToHex function is changed #1230

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 15 additions & 4 deletions ciphers/AESEncryption.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,6 @@
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.xml.bind.DatatypeConverter;

/**
* This example program shows how AES encryption and decryption can be done in
Expand All @@ -19,6 +18,8 @@
*/
public class AESEncryption {


private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
/**
* 1. Generate a plain text for encryption 2. Get a secret key (printed in
* hexadecimal form). In actual use this must by encrypted and kept safe. The
Expand Down Expand Up @@ -103,12 +104,22 @@ public static String decryptText(byte[] byteCipherText, SecretKey secKey) throws

/**
* Convert a binary byte array into readable hex form
*
* Old library is deprecated on OpenJdk 11 and
* this is faster regarding other solution is using StringBuilder
* Credit
* {@link
* https://stackoverflow.com/questions/9655181/how-to-convert-a-byte-array-to-a-hex-string-in-java/9855338#9855338}
* @param hash
* (in binary)
* @return hexHash
*/
private static String bytesToHex(byte[] hash) {
return DatatypeConverter.printHexBinary(hash);
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = HEX_ARRAY[v >>> 4];
hexChars[j * 2 + 1] = HEX_ARRAY[v & 0x0F];
}
return new String(hexChars);
}
}