安卓逆向腾讯动漫app返回数据加密分析案例分享

    public String decodeHttpRequest(byte[] bArr, int i) {
        return ees3DecodeECB2Str(encryptKey(), bArr);
    }
    public String encodeHttpRespone(byte[] bArr, int i) {
        return ees3EncodeECB2Str(encryptKey(), bArr);
    }

    public static byte[] des3EncodeECB(byte[] bArr, byte[] bArr2) {
        SecretKey generateSecret = SecretKeyFactory.getInstance("desede").generateSecret(new DESedeKeySpec(bArr));
        Cipher instance = Cipher.getInstance("desede/ECB/PKCS5Padding");
        instance.init(1, generateSecret);
        return instance.doFinal(bArr2);
    }
    public static String ees3EncodeECB2Str(byte[] bArr, byte[] bArr2) {
        byte[] bArr3 = new byte[0];
        try {
            return Base64.encodeToString(des3EncodeECB(bArr, bArr2), 2);
        } catch (Exception unused) {
            return "";
        }
    }
    public static byte[] ees3DecodeECB(byte[] bArr, byte[] bArr2) {
        SecretKey generateSecret = SecretKeyFactory.getInstance("desede").generateSecret(new DESedeKeySpec(bArr));
        Cipher instance = Cipher.getInstance("desede/ECB/PKCS5Padding");
        instance.init(2, generateSecret);
        return instance.doFinal(bArr2);
    }