package com.doumee.config.alipay;
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import javax.crypto.Cipher;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.GCMParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.nio.charset.StandardCharsets;
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import java.security.GeneralSecurityException;
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import java.security.NoSuchAlgorithmException;
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import java.util.Base64;
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public class WXTransferAesUtil {
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static final int KEY_LENGTH_BYTE = 32;
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static final int TAG_LENGTH_BIT = 128;
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private final byte[] aesKey;
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/**
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* @param key ApiV3Key
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*/
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public WXTransferAesUtil(byte[] key) {
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if (key.length != KEY_LENGTH_BYTE) {
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throw new IllegalArgumentException("无效的ApiV3Key，长度必须为32个字节");
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}
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this.aesKey = key;
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}
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/**
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* AES 解密
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*
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* @param associatedData 附加数据
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* @param nonce 随机串
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* @param ciphertext 数据密文
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*/
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public String decryptToString(byte[] associatedData, byte[] nonce, String ciphertext) {
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try {
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Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
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SecretKeySpec key = new SecretKeySpec(aesKey, "AES");
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GCMParameterSpec spec = new GCMParameterSpec(TAG_LENGTH_BIT, nonce);
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cipher.init(Cipher.DECRYPT_MODE, key, spec);
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cipher.updateAAD(associatedData);
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return new String(cipher.doFinal(Base64.getDecoder().decode(ciphertext)), StandardCharsets.UTF_8);
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} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
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throw new IllegalStateException(e);
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} catch (GeneralSecurityException e) {
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throw new IllegalArgumentException(e);
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}
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}
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public static void main(String[] args) {
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String associatedData = "certificate";
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String nonce = "cd1f5b224810";
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String ciphertext = "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";
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WXTransferAesUtil WXTransferAesUtil = new WXTransferAesUtil("NJTLJSTZYXZRGScaiwubuzichanbu666".getBytes());
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String s = WXTransferAesUtil.decryptToString(associatedData.getBytes(), nonce.getBytes(), ciphertext);
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System.out.println(s);
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}
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}
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