源码：https://github.com/yanjunli/eos-crypto-java
eos-crypto-java 目前可以支持 基于 ECC+AES 的加解密方式。
在本压缩包中，包含基于jdk1.5 打好的jar 包。
jdk 1.5+
String privateKey = "5KTZYCDdcfNrmEpcf97SJBCtToZjYHjHm8tqTWvzUbsUJgkxcfk";
EosPrivateKey eosPrivateKey = new EosPrivateKey(privateKey);
EosPublicKey eosPublicKey = eosPrivateKey.getPublicKey();
// 转换成 EC privatekey
ECPrivateKey ecPrivateKey = eosPrivateKey.getECPrivateKey();
ECPublicKey ecPublicKey = eosPublicKey.getECPublicKey();
byte[] plaindata = "{\"age\": 1,\"12345\":\"24qqwazzxdtttdxkaskjewuizckczxnlsdosasda4!!!@#$$%^&&*(()(^#\"}".getBytes("utf8");
System.out.println("加密原文：" + new String(plaindata));
byte[] encryptdata = ECCUtil.publicEncrypt(plaindata,ecPublicKey);
System.out.println("加密后密文：" + HexUtils.toHex(encryptdata));
plaindata = ECCUtil.privateDecrypt(encryptdata,ecPrivateKey);
System.out.println("解密后原文: "+ new String(plaindata));/**
*
* sender 发起方密钥对
*
* EOS8g1u3ktAGHs4QsVp9aeaWNebFLtprQHwpaSjegx6iEuoTNhjXU
* 5KTZYCDdcfNrmEpcf97SJBCtToZjYHjHm8tqTWvzUbsUJgkxcfk
*
* receiver 接收方一密钥对
*
* EOS7ez2gagfoXw9XdW3kRx3EsCoWvupGR6u6ZJhFPEe9Q12V8JgUL
* 5JUrqxYcssR9LLVtWDeQcc9HCX4FEqBG7d9GW6t7mvmB1rUuZr9
*
* receiver 接收方二 密钥对
* EOS5WMHqw6jDDBPBm7JXTHemAwtSo2tp93pRysJMRhiT1zUYb24vL
* 5HrcVeuHHNwHsivrMoJ9XvU6EM7Q2wQ2ECiy8GeoiuamhNiSuZq
*/
// 1. 调用钱包获取 发送方私钥
String senderPrivateKey = "5KTZYCDdcfNrmEpcf97SJBCtToZjYHjHm8tqTWvzUbsUJgkxcfk";
EosPrivateKey senderECPrivateKey = new EosPrivateKey(senderPrivateKey);
// EosPublicKey senderECPublicKey = new EosPublicKey(senderPublicKey);
// 2. 根据私钥 生成公钥。 或者直接根据公钥 调用钱包获取私钥。 都可以。
EosPublicKey senderECPublicKey = senderECPrivateKey.getPublicKey();
String senderPublicKey = senderECPublicKey.toString();
/**
* 调用钱包获取 接收方私钥 获取公私钥方式 根据需求确定。
* 1. 可以根据公钥，从钱包里获取私钥
* 2. 也可以直接从钱包里取出私钥，反向生成公钥
*
* 实际业务场景，发起方只会有接收方公钥，并没有接收方私钥.
* 此时 可以通过 new EosPublicKey(receiverPublicKey) 方式 生成EosPublicKey 对象。
*/
String receiverPrivateKey = "5JUrqxYcssR9LLVtWDeQcc9HCX4FEqBG7d9GW6t7mvmB1rUuZr9";
EosPrivateKey receiverECPrivateKey = new EosPrivateKey(receiverPrivateKey);
EosPublicKey receiverECPublicKey = receiverECPrivateKey.getPublicKey();
String receiverPublicKey = receiverECPublicKey.toString();
// String receiverPublicKey = "EOS7ez2gagfoXw9XdW3kRx3EsCoWvupGR6u6ZJhFPEe9Q12V8JgUL";
/**
* 使用 发送者方私钥 和接收方公钥，生成 aes key, 对数据进行加密
* nonce 为初始化向量，可以使用固定值，
* 也可以使用随机值，并使用私有协议。根据业务需求选择。
*/
byte[] nonce = new byte[16];
MTRandom random=new MTRandom();
random.nextBytes(nonce);
// 待加密 数据
byte[] params = "{\"test1\": 1,\"test2\":\"24qqwazzxdtttdxkaskjewuizckczxnlsdosasda4!!!@#$$%^&&*((){}(^#\"}".getBytes("utf8");
System.out.println("原始加密数据： " + new String(params,"utf8"));
byte[] encrypted = new byte[0];
try {
encrypted = CryptUtil.encrypt(senderECPrivateKey,receiverECPublicKey,nonce,params);
} catch (InvalidCipherTextException e) {
e.printStackTrace();
System.out.println(" do something!!!!");
}
System.out.println("加密后数据： " + new String(encrypted,"utf8"));
try {
byte[] plainText = CryptUtil.decrypt(receiverECPrivateKey,senderECPublicKey,nonce,encrypted);
// 解密后数据
System.out.println("解密后数据 : "+new String(plainText, "utf8"));
} catch (InvalidCipherTextException e) {
e.printStackTrace();
System.out.println(" do something!!!!");
}/**
*
* sender
*
* EOS8g1u3ktAGHs4QsVp9aeaWNebFLtprQHwpaSjegx6iEuoTNhjXU
* 5KTZYCDdcfNrmEpcf97SJBCtToZjYHjHm8tqTWvzUbsUJgkxcfk
*
* receiver 平台公私钥对
*
* EOS7ez2gagfoXw9XdW3kRx3EsCoWvupGR6u6ZJhFPEe9Q12V8JgUL
* 5JUrqxYcssR9LLVtWDeQcc9HCX4FEqBG7d9GW6t7mvmB1rUuZr9
*
* receiver 省侧公私钥对
* EOS5WMHqw6jDDBPBm7JXTHemAwtSo2tp93pRysJMRhiT1zUYb24vL
* 5HrcVeuHHNwHsivrMoJ9XvU6EM7Q2wQ2ECiy8GeoiuamhNiSuZq
*/
// 1. 调用钱包获取 发送方私钥
String senderPrivateKey = "5KTZYCDdcfNrmEpcf97SJBCtToZjYHjHm8tqTWvzUbsUJgkxcfk";
EosPrivateKey senderECPrivateKey = new EosPrivateKey(senderPrivateKey);
// EosPublicKey senderECPublicKey = new EosPublicKey(senderPublicKey);
// 2. 根据私钥 生成公钥。 或者直接根据公钥 调用钱包获取私钥。 都可以，看具体业务需求
EosPublicKey senderECPublicKey = senderECPrivateKey.getPublicKey();
String senderPublicKey = senderECPublicKey.toString();
/**
* 调用钱包获取 接收方私钥 获取公私钥方式 根据业务需求确定。
* 1. 可以根据公钥，从钱包里获取私钥
* 2. 也可以直接从钱包里取出私钥，反向生成公钥
*/
String receiverPrivateKey = "5JUrqxYcssR9LLVtWDeQcc9HCX4FEqBG7d9GW6t7mvmB1rUuZr9";
EosPrivateKey receiverECPrivateKey = new EosPrivateKey(receiverPrivateKey);
EosPublicKey receiverECPublicKey = receiverECPrivateKey.getPublicKey();
/**
* 生成对称密钥
*/
byte[] nonce = new byte[16];
MTRandom random=new MTRandom();
random.nextBytes(nonce);
// 待加密 数据
byte[] params = "{\"age\": 1,\"汉字\":\"为初始化向量，可以使用固定值，\"，\"12345\":\"24qqwazzxdtttdxkaskjewuizckczxnlsdosasda4!!!@#$$%^&&*(()(^#\"}".getBytes("utf8");
System.out.println("加密前原始数据： " + new String(params,"utf8"));
// 发起方使用对称密钥，对原始数据进行加密
byte[] encryptedData = null;
try {
encryptedData = CryptUtil.aesEncryptWithNOIV(nonce,params);
} catch (InvalidCipherTextException e) {
e.printStackTrace();
System.out.println(" do something!!!!");
}
System.out.println("加密后数据： " + HexUtils.toHex(encryptedData));
System.out.println("加密前对称密钥： " + HexUtils.toHex(nonce));
// 发起方使用 接收方公钥，对对称密钥进行加密
byte[] encryptedKey = null;
try {
encryptedKey = ECCUtil.publicEncrypt(nonce,receiverECPublicKey.getECPublicKey());
} catch (Exception e) {
e.printStackTrace();
System.out.println(" do something!!!!");
}
System.out.println("加密后对称密钥： " + HexUtils.toHex(encryptedKey));
// 将对称密钥加密后的数据，密文组装后，进行网络传输。
// 组装 demo
/**
* 4 byte | encryptedKey | 4 byte | encryptedData
* 对称密钥加密后的数据长度 | ECC 加密后的对称秘钥 | 密文数据长度 | AES 加密后的密文
*/
ByteBuffer bytebuffer = ByteBuffer.allocate( 4 + encryptedKey.length + 4 +encryptedData.length);
bytebuffer.putInt(encryptedKey.length);
bytebuffer.put(encryptedKey);
bytebuffer.putInt(encryptedData.length);
bytebuffer.put(encryptedData);
// String base58encode = Base58.encode(bytebuffer.array());
// System.out.println("base58 编码后的: " + base58encode);
// 进行 16 进制编码
String hexencode = HexUtils.toHex(bytebuffer.array());
System.out.println(" 将数字信封和密文组装后的报文 16进制格式：" + hexencode);
System.out.println("发送方数据加密完成，可以将数据发送出去 ");
/**
***************************************************** 以下为接收方 代码 *************************************
*/
// byte[] base58decode = Base58.decode(hexencode);
byte[] hexdecode = HexUtils.toBytes(hexencode);
ByteBuffer receiveBuffer = ByteBuffer.wrap(hexdecode);
// 获取到对称秘钥长度
int receivedEncryptedKeyLength = receiveBuffer.getInt();
// 加密后的对称密钥key
byte[] receivedEncryptKey = new byte[receivedEncryptedKeyLength];
receiveBuffer.get(receivedEncryptKey,0,receivedEncryptedKeyLength);
System.out.println(" 接收到的 加密后的对称密钥 ：" + HexUtils.toHex(receivedEncryptKey));
// 获取到的 密文的长度
int contextLength = receiveBuffer.getInt();
// 密文
byte[] receivedEncryptContext = new byte[contextLength];
receiveBuffer.get(receivedEncryptContext,0,contextLength);
System.out.println(" 接收到的 密文：" + HexUtils.toHex(receivedEncryptContext));
// 使用接收方私钥，解密对称密钥
byte[] receiveddecryptKey = null;
try {
receiveddecryptKey = ECCUtil.privateDecrypt(receivedEncryptKey,receiverECPrivateKey.getECPrivateKey());
} catch (Exception e) {
e.printStackTrace();
System.out.println(" do something!!!!");
}
System.out.println(" 解密后的对称密钥 ：" + HexUtils.toHex(receiveddecryptKey));
// 使用对称密钥，对密文进行解密
try {
byte[] plainText = CryptUtil.aesDecryptWithNOIV(receiveddecryptKey,receivedEncryptContext);
// 解密后数据
System.out.println("解密后数据 : "+new String(plainText, "utf8"));
} catch (InvalidCipherTextException e) {
e.printStackTrace();
System.out.println(" do something!!!!");
} /**
* 16 进制 交易数据
*/
String hexData = "6a3f0e5f210a14b478050000000001603463937a4c8f440000b82a5d5a91d401809fd18c4dea8f4400000020476d964aa701809fd18c4dea8f440f495ab51e9cb44908424f53533130303008554d43503130303004554d43501f3533314249503242333235323032303034313531363238323231353336363908ab91465f12000006017560c95d040000007560c95d0400000000000000000000000100000000000000080006323130303130c818f4515f12000040035df1481b000006363938303237082d4359313647424e0200000000000000000000000000";
/**
* eos 签名
*/
String signStr = "SIG_K1_K1Pgvc9jXrCbPXx23zGugEfhxcGXoCSJjFEzFQj2HoFie18qnizWzQGssQezmS8PZ9fkKci3k8PGM2MQpJvuXtRZtd4oCD";
EcSignature ecSignature = new EcSignature(signStr);
Sha256 curData = getDigestForSignature(new TypeChainId("4a2fb7b7aacce5ea952dc96fbac6ed648efc08c1e1577882f3f33c82da248d64"),hexData);
/**
* 恢复公钥
*/
EosPublicKey eosPublicKey = EcDsa.recoverPubKey(curData.getBytes(), ecSignature);
System.out.println("publicKey: " + eosPublicKey.toString());
/**
* 验证 恢复出来的公钥，与原公钥是否相同
*/
Assert.assertEquals("EOS4wTJSTd29mZ4MNPZ2y4q2PtrimVpHLwHg8U4XMdzSBLa4BeYmN",eosPublicKey.toString());