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Merge pull request #1230 from hakan0arslan/master

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bytesToHex function is changed
This commit is contained in:
Yang Libin
2020-03-15 15:35:58 +08:00
committed by GitHub
parent fcac632247 0bf21d6e2e
commit a45cbeb155
1 changed files with 15 additions and 4 deletions
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19
ciphers/AESEncryption.java
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@ -8,7 +8,6 @@ import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator; import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException; import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey; import javax.crypto.SecretKey;
import javax.xml.bind.DatatypeConverter;
/** /**
* This example program shows how AES encryption and decryption can be done in * This example program shows how AES encryption and decryption can be done in
@ -19,6 +18,8 @@ import javax.xml.bind.DatatypeConverter;
*/ */
public class AESEncryption { 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 * 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 * hexadecimal form). In actual use this must by encrypted and kept safe. The
@ -103,12 +104,22 @@ public class AESEncryption {
/** /**
* Convert a binary byte array into readable hex form * 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 * @param hash
* (in binary) * (in binary)
* @return hexHash * @return hexHash
*/ */
private static String bytesToHex(byte[] hash) { public static String bytesToHex(byte[] bytes) {
return DatatypeConverter.printHexBinary(hash); 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);
} }
} }