如果需要解析unionId的话,因为微信本身没有给出java的sdk,所以我们需要自己写解密的方法,并且因为jdk的安全机制,我们还需要一些操作来避免这些坑。
前置设置
/opt/jdk/jdk1.8.0_151/jre/lib/security 目录下
修改java.security文件 加入 security.provider.10=org.bouncycastle.jce.provider.BouncyCastleProvider
/opt/jdk/jdk1.8.0_151/jre/lib/ext目录下 放入bcprov-jdk15on-1.57.jar
WechatUtil
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.security.Security;
public class WechatUtil {
public static void main(String[] args) {
// 测试
String result = decryptData(
"+6fr9M+bNeRk8LQOOuxqBLuzsydnIh7D2UvImuWicfzJsbrRFptPr7yXHubgTdRd6JHwvjDXD+Q9L0oeTjXlBZilfipjRZJSV7nOpaq++DB5wQr6hKAPsvLmUjOpTPocpVrRDbkXRQKAgl6uTXkR8SdUL3j0zihANr3ANaz2kgg8X+iCJKSxmCuxwPswFCrYaXih2Z7+s/EqWU0ACFgaoZMNkliYBy9mF/pwzCfzsDVx+eJu1eG2UmU6e0e8rUOcEGv4KxfYntvLBN7LJEfOEfYcyemNYtVt3ALDE2sOxI4pb8XxUUO3zn+Yt7e5xWqmfqFj1YK3CCl0ILHle5JlZxGz178PsztDoCnOMoA4NwEoGfqCsUH1pM7AsyfcOh27yqqk=",
"2gCRTCyEpjQTW5Fc89yg==",
"XBzf8VMLBIsFBZvjOWNg=="
);
System.out.println("result = " + result);
}
public static String decryptData(String encryptDataB64, String sessionKeyB64, String ivB64) {
return new String(
decryptOfDiyIV(
Base64.decode(encryptDataB64),
Base64.decode(sessionKeyB64),
Base64.decode(ivB64)
)
);
}
private static final String KEY_ALGORITHM = "AES";
private static final String ALGORITHM_STR = "AES/CBC/PKCS7Padding";
private static Key key;
private static Cipher cipher;
private static void init(byte[] keyBytes) {
// 如果密钥不足16位,那么就补足. 这个if 中的内容很重要
int base = 16;
if (keyBytes.length % base != 0) {
int groups = keyBytes.length / base + (keyBytes.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyBytes, 0, temp, 0, keyBytes.length);
keyBytes = temp;
}
// 初始化
Security.addProvider(new BouncyCastleProvider());
// 转化成JAVA的密钥格式
key = new SecretKeySpec(keyBytes, KEY_ALGORITHM);
try {
// 初始化cipher
cipher = Cipher.getInstance(ALGORITHM_STR, "BC");
} catch (Exception e) {
e.printStackTrace();
}
}
/** * 解密方法 * * @param encryptedData 要解密的字符串 * @param keyBytes 解密密钥 * @param ivs 自定义对称解密算法初始向量 iv * @return 解密后的字节数组 */
private static byte[] decryptOfDiyIV(byte[] encryptedData, byte[] keyBytes, byte[] ivs) {
byte[] encryptedText = null;
init(keyBytes);
try {
cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(ivs));
encryptedText = cipher.doFinal(encryptedData);
} catch (Exception e) {
e.printStackTrace();
}
return encryptedText;
}
}
今天的文章微信开发解析unionId分享到此就结束了,感谢您的阅读。
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