package com.community.shop.util; /** * description: * author: sh * date:2019/3/21 13:52 */ 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; /** * 微信工具類 */ public class WeChatUtil { public static void main(String[] args) { String result = decryptData( "xCv/yD0GQ7+t1cx/IuGaAzAGZ931UOn822KlhAxMMBqcNKGefgsRytVl9ysaNn+hFPqtb4qphguIHvVDRV7kmwZccGxli5J41lyI1fjemRuDvyng//XTZzDno3eCp+9q9eGrh3OVoL5GipRnNqRVtABJ7ummOAcY9tWoRPM2ee2YEX/OT+OAaoylR2kyXFZk7VsN4iB6+23HmAyQtnwzIobqSkhNNvQRDyYLrOB8q+D7MCfaYbXQpA4wbmHxSLnB3d6tqL/w0YlmUzMbPjmGbZD3frW4yAsaJ0oMLtHJRR1g/SlPgCtGlhhoSPXqHrOg8dRtRcwO8ileuYGykKm72ZWxCmRIfDjAFUetocQuLlaKp8ikIfhr3zbFjuC0G87dBHZTs+YmVAGDOIy1xP7FbL46bxcSdRPdfW5eOrO/B3zjXafu65gzY4FgUY45QoEO+HPEZNzqjNqRPyMHX+gcERICyVqArmh2g899Rro+ubU=", "FvEs/ZiJQBJr5nrs2LX1AA==", "fxSKjXsRur6jpzZMM6PM7w==" ); 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) { // 如果密鑰不足16位,那麼就補足. 這個if 中的內容很重要 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()); // 轉化成JAVA的密鑰格式 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 解密密鑰 * @param ivs 自定義對稱解密算法初始向量 iv * @return 解密後的字節數組 */ 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; } }
java微信解密session_key 工具類
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