# 钱包地址、公私钥生成算法 相关源码开源地址：研发人员加班打包创建中... 核心加密算法： 数字签名密钥算法：ECDSA， 椭圆曲线（EC）域参数设定：secp256k（比特币选择的也是该算法）， 数字签名签名/验证算法：SHA512withECDSA； Hash算法：SHA256、RIPEMD160算法（RACE原始完整性校验讯息摘要）； ### 私钥说明 私钥字节总长度：144位（后68位为公钥的动态字节b） 例如私钥字节： \[48, -127, -115, 2, 1, 0, 48, 16, 6, 7, 42, -122, 72, -50, 61, 2, 1, 6, 5, 43, -127, 4, 0, 10, 4, 118, 48, 116, 2, 1, 1, 4, 32, 111, 96, -19, 42, -3, -105, -91, -46, -79, -82, -79, 108, 96, -37, 91, -23, -40, 102, -114, 2, 67, -70, -100, 102, 90, -29, -127, -120, 125, 66, -11, -90, -96, 7, 6, 5, 43, -127, 4, 0, 10, -95, 68, 3, 66, 0, 4, 88, -23, 4, 81, 31, 69, 102, 52, 32, -73, 15, -48, 56, -120, -58, 49, -34, 67, 76, 47, -73, 74, 123, -22, -67, 82, -125, -42, 108, 24, 116, 88, -88, 53, 105, 78, 123, -13, 116, 40, -92, 47, 1, 54, 101, -63, -125, 26, 22, 29, -120, -32, -89, -36, -107, -27, -119, -18, -77, -71, 69, 103, 47, 63] 转换为字符串：30818d020100301006072a8648ce3d020106052b8104000a0476307402010104206f60ed2afd97a5d2b1aeb16c60db5be9d8668e0243ba9c665ae381887d42f5a6a00706052b8104000aa1440342000458e904511f45663420b70fd03888c631de434c2fb74a7beabd5283d66c187458a835694e7bf37428a42f013665c1831a161d88e0a7dc95e589eeb3b945672f3f ### 公钥说明 公钥字节总长度：88位（前20位为固定字节a，后68位为公钥动态字节b） 例如公钥字节： \[48, 86, 48, 16, 6, 7, 42, -122, 72, -50, 61, 2, 1, 6, 5, 43, -127, 4, 0, 10, 3, 66, 0, 4, 88, -23, 4, 81, 31, 69, 102, 52, 32, -73, 15, -48, 56, -120, -58, 49, -34, 67, 76, 47, -73, 74, 123, -22, -67, 82, -125, -42, 108, 24, 116, 88, -88, 53, 105, 78, 123, -13, 116, 40, -92, 47, 1, 54, 101, -63, -125, 26, 22, 29, -120, -32, -89, -36, -107, -27, -119, -18, -77, -71, 69, 103, 47, 63] 其中：48, 86, 48, 16, 6, 7, 42, -122, 72, -50, 61, 2, 1, 6, 5, 43, -127, 4, 0, 10 为固定的公钥前缀。为椭圆算法密钥对的算法标识、以及主编码格式标识。 转换为字符串：3056301006072a8648ce3d020106052b8104000a0342000458e904511f45663420b70fd03888c631de434c2fb74a7beabd5283d66c187458a835694e7bf37428a42f013665c1831a161d88e0a7dc95e589eeb3b945672f3f 部分展示代码 ### 创建新的密钥对 ```java /** * 创建新的密钥对 * @return */ public static KeyPair newECKeyPair() throws InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchProviderException { // 注册 BC Provider Security.addProvider(new BouncyCastleProvider()); // 创建椭圆曲线算法的密钥对生成器，算法为 ECDSA KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM, BouncyCastleProvider.PROVIDER_NAME); // 椭圆曲线（EC）域参数设定 ECParameterSpec ecSpec = ECNamedCurveTable.getParameterSpec(EC_PARAMETER_SPEC); //使用给定的参数集和随机源初始化密钥对生成器，生成公私钥 keyPairGenerator.initialize(ecSpec, new SecureRandom()); return keyPairGenerator.generateKeyPair(); } ``` ### 通过密钥对获取到公私钥字节 ```java KeyPair keyPair = ECDSAUtils.newECKeyPair(); //获取私钥 BCECPrivateKey privateKey = (BCECPrivateKey) keyPair.getPrivate(); //获取公钥 BCECPublicKey publicKey = (BCECPublicKey) keyPair.getPublic(); //获取到私钥字节 this.setPrivateKey(ECDSAUtils.getBytesByKey(privateKey)); //获取到公钥字节 this.setPublicKey(ECDSAUtils.getBytesByKey(publicKey)); ``` ### 通过公私钥字节获取到公私钥字符串 字节数组转16进制字符串 ```java /** * 公钥 * @return */ public String getPublicKeyStr(){ return ByteUtils.bytesToHexString(this.publicKey); } /** * 私钥 * @return */ public String getPrivateKeyStr(){ return ByteUtils.bytesToHexString(this.privateKey); } ``` ### 通过公私钥字符串获取到公私钥字节 ```java /** * 通过公钥字符串获取公钥字节 * @param pubKeyStr 公钥字符串 * @return 公钥字节 */ public static byte[] getPubkeyByPubkeyStr(String pubKeyStr) { return ByteUtils.hexStringToByte(pubKeyStr); } /** * 通过私钥字符串获取私钥字节 * @param privateKeyStr 私钥字符串 * @return 私钥字节 */ public static byte[] getPrivateKeyByPrivateKeyStr(String privateKeyStr) { return ByteUtils.hexStringToByte(privateKeyStr); } ``` ### 通过公钥字节生成公钥Hash ```java /** * ripeMD160Hash * 计算公钥的 RIPEMD160 Hash值 * 通过公钥获取到公钥Hash * 获取公钥hash * @param pubKey 公钥 * @return ipeMD160Hash(sha256 ( pubkey)) */ public static byte[] getPubkeyHashByPubkey(byte[] pubKey) { //1. 先对公钥做 sha256 处理 byte[] shaHashedKey = DigestUtils.sha256(pubKey); RIPEMD160Digest ripemd160 = new RIPEMD160Digest(); ripemd160.update(shaHashedKey, 0, shaHashedKey.length); byte[] output = new byte[ripemd160.getDigestSize()]; ripemd160.doFinal(output, 0); return output; } ``` ### 通过公钥Hash生成地址 通过算法保证绝对不可能通过地址推算出公钥。 ```java /** * 通过公钥字节获取钱包地址 * @param pubkeyHashBytes * @return */ private static String getAddressByPubkeyHash(byte[] pubkeyHashBytes) { try { // 2. 添加版本 0x00 ByteArrayOutputStream addrStream = new ByteArrayOutputStream(); addrStream.write((byte) 0); addrStream.write(pubkeyHashBytes); byte[] versionedPayload = addrStream.toByteArray(); // 3. 计算校验码 byte[] checksum = Wallet.checksum(versionedPayload); // 4. 得到 version + paylod + checksum 的组合 addrStream.write(checksum); byte[] binaryAddress = addrStream.toByteArray(); // 5. 执行Base58转换处理 return Base58Check.rawBytesToBase58(binaryAddress); } catch (Exception e) { log.error("通过公钥获取钱包失败",e); throw new ServiceException("错误的公钥地址"); } } ``` ### 通过私钥字节推导出公钥字节 ```java /** * 通过私钥字节获取公钥字节 * @param privateKeyBytes 私钥字节 * @return 公钥字节 */ public static byte[] getPubkeyByteByPrivateKey(byte[] privateKeyBytes){ byte[] pubkey = new byte[88]; pubkey[0]=48; pubkey[1]=86; System.arraycopy(privateKeyBytes, 6, pubkey, 2, 18); System.arraycopy(privateKeyBytes, 76, pubkey, 20, 68); return pubkey; } ``` 公钥、公钥Hash、地址之间的关系： 私钥->公钥->公钥Hash->地址（注意：无法反向推导） . --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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