我正在运行PHP 7.2.8。根据{{1}}，chacha20-poly1305是受支持的算法：
import java.util.Comparator;
import java.util.PriorityQueue;
public class Main {
/* Create the open and closed lists */
private static Comparator<Board> comparator = new BoardComparator();
private static PriorityQueue<Board> open =
new PriorityQueue<Board>(10, comparator);
private static Closed closed = new Closed();
/* Declare variables that will be used for
* purposes of processing the lists and generating
* child board objects.
*/
private static Board b;
private static int board [][] = new int[4][4];
private static int cboard1 [][] = new int [4][4];
private static int cboard2 [][] = new int [4][4];
private static String id = new String();
private static int cost = 0;
private static int depth;
public static void main(String[] args) {
/* Create the root board object*/
Board root = new Board ();
run(root);
}
/* Uses the best-first-search algorithm to solve the NQueens puzzle */
public static void run(Board root) {
/* Enqueue the root board object on the open and closed lists */
open.add(root);
closed.add(root);
/* While the open list isn't empty */
while (open.size() != 0){
/* Dequeue a board object from the open list and
* get its depth, cost and the actual board */
b = open.remove();
cost = b.getG();
depth = b.getH();
board = b.getBoard();
/* If the cost of the dequeued a board object is
* equal to 0, end processing */
if (cost == 0){
System.out.println("\nGoal Achieved ...");
b.displayBoard();
System.out.println(b.toString());
break;
}
/* Display the contents of the board object */
System.out.println("\nEvaluating Board ...");
b.displayBoard();
System.out.println(b.toString());
enumerateChildren();
}
}
/* Enumerates the next set of child board objects in the graph */
public static void enumerateChildren() {
/* Get the depth for the child board objects */
depth += 1;
System.out.println("\nGenerating Children ...");
for (int i = 0; i < board.length; i++){
for (int j = 0; j < board[i].length; j++){
/* If the current element is a queen */
if (board[i][j] == 1){
/* Copy board and remove the queen from the copies */
cboard1 = Board.copyBoard(board);
cboard2 = Board.copyBoard(board);
cboard1[i][j] = 0;
cboard2[i][j] = 0;
if (j == 0){
/* If the queen was in the first column, move it
* one element to the right and process the child board
*/
cboard1[i][j+1] = 1;
processChild(cboard1);
} else if ((j == 1) || (j == 2)){
/* If the queen was in the second or third columns, move it
* one element to the right and one element to the left, and
* process the child boards
*/
cboard1[i][j-1] = 1;
cboard2[i][j+1] = 1;
processChild(cboard1);
processChild(cboard2);
} else {
/* If the queen was in the fourth column, move it
* one element to the left and process the child board
*/
cboard1[i][j-1] = 1;
processChild(cboard1);
}
}
}
}
}
/* Processes each of the child board objects that has been enumerated */
public static void processChild(int board[][]){
/* Get id and cost of board */
id = Board.getId(board);
cost = Board.evaluateBoard(board);
/* Create a board Object */
Board b = new Board (board, id, depth, cost);
/* If the board object isn't on the closed
* list, enqueue it on the open and closed lists
*/
if (!closed.isReviewed(b)){
open.add(b);
closed.add(b);
b.displayBoard();
System.out.println(b.toString());
}
}
}
输出“是”。
所以我尝试使用openssl_get_cipher_methods：
echo in_array('chacha20-poly1305', openssl_get_cipher_methods()) ? 'yes' : 'no';
输出PHP警告：
警告：openssl_encrypt（）：无法为不支持AEAD的密码提供经过身份验证的标记
chacha20-poly1305是$plaintext = 'zzzzzz';
$key = str_repeat('k', 32);
$nonce = str_repeat('n', 12);
$aad = '';
$r = openssl_encrypt(
$plaintext,
'chacha20-poly1305',
$key,
OPENSSL_RAW_DATA,
$nonce,
$newtag,
$aad
);
echo bin2hex($r);
。
我能够通过$r获得f4854428b8a8的相同输出（即通过执行此操作没有r）：
chacha20输出相同的事实意味着Poly1305身份验证代码既未添加也未添加至密文。
我的问题是...如何在PHP中使用OpenSSL获得Poly1305身份验证代码？
此外，我知道libsodium提供了chacha20-poly1305支持，但我仍然对它应该如何与OpenSSL一起使用感到好奇。
答案 0 :(得分：0)
OpenSSL的问题仍未解决（2020年11月），因此如果您需要使用 ChaCha20-Poly1305通过PHP进行身份验证的加密，我建议从 可以实现的Leigh（https://github.com/lt/PHP-AEAD-ChaCha20-Poly1305） 非常简单。
auth-tag（$ tag）附加在密文中，需要先分隔 开始解密。
请注意，我正在测试与OpenJDK 11（Java）相同的功能：这两个功能产生相同的密文，但不同身份验证标签，因此它们无法在跨平台中使用环境。
输出：
ChaCha20-Poly1305 encryption with leigh/aead-chacha20-poly1305
tag (16 bytes long, Base64): FK11WpqxhDuJytSgHN86tQ==
ciphertext (Base64): 1rXNtbeGF9KsMZXgPjszIeJ0Ze5ua+Uh5Aexu1ngaH4XoeldG71DwuDEAA==
decrypt: The quick brown fox jumps over the lazy dog
代码（安全警告：切勿在生产中使用静态密钥或随机数）：
<?php
# make sure that you used Composer to get "leigh/aead-chacha20-poly1305"
require __DIR__ . '/vendor/autoload.php';
// ### never use static key & nonce in production, this is for testing only ###
$key = '12345678901234567890123456789012'; // 32 bytes
$nonce = '123456789012'; // 12 bytes
$plaintext = 'The quick brown fox jumps over the lazy dog';
$aad = '';
echo 'ChaCha20-Poly1305 encryption with leigh/aead-chacha20-poly1305' . PHP_EOL;
list($ciphertext, $tag) = \ChaCha20Poly1305\encrypt($key, $nonce, $aad, $plaintext);
echo 'tag (16 bytes long, Base64): ' . base64_encode($tag) . PHP_EOL;
echo 'ciphertext (Base64): ' . base64_encode($ciphertext) . PHP_EOL;
$decrypt = \ChaCha20Poly1305\decrypt($key, $nonce, $aad, $ciphertext, $tag);
echo 'decrypt: ' . $decrypt . PHP_EOL;
?>