Java实现hmacsha1加密算法的完整代码

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class SignatureGenerator {
    public static void main(String[] args) {
        String username = "tIsMUhEc0tp&ee050d34cabc|sdkappid=20250616;random=0";
        String deviceSecret = "dARYgMURsw0pAV1w";
        // 1. 将签名类型标识改为 hmacsha1
        String signatureType = "hmacsha1"; 

        try {
            // 2. 将算法实例改为 HmacSHA1
            Mac mac = Mac.getInstance("HmacSHA1");
            SecretKeySpec secretKeySpec = new SecretKeySpec(
                    deviceSecret.getBytes(StandardCharsets.UTF_8), 
                    "HmacSHA1" // 3. 密钥规范也需同步改为 HmacSHA1
            );
            mac.init(secretKeySpec);
            byte[] hmacBytes = mac.doFinal(username.getBytes(StandardCharsets.UTF_8));

            // 使用标准 Base64 编码
            String signature = Base64.getEncoder().encodeToString(hmacBytes);

            // 拼接 password
            String password = signature + ";" + signatureType;
            System.out.println("Password: " + password);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
public class HMACSHA1Example {
    /**
     * 计算 HMAC-SHA1 摘要，返回十六进制字符串
     */
    public static String hmacSha1Hex(String key, String message) throws Exception {
        byte[] hmacBytes = hmacSha1(key, message);
        return bytesToHex(hmacBytes);
    }
    /**
     * 计算 HMAC-SHA1 摘要，返回 Base64 字符串
     */
    public static String hmacSha1Base64(String key, String message) throws Exception {
        byte[] hmacBytes = hmacSha1(key, message);
        return Base64.getEncoder().encodeToString(hmacBytes);
    }
    /**
     * 计算 HMAC-SHA1 摘要，返回原始字节数组
     */
    public static byte[] hmacSha1(String key, String message) throws Exception {
        // 1. 获取 Mac 实例
        Mac mac = Mac.getInstance("HmacSHA1");
        // 2. 创建密钥规范（使用 UTF-8 编码）
        SecretKeySpec keySpec = new SecretKeySpec(
            key.getBytes(StandardCharsets.UTF_8), 
            "HmacSHA1"
        );
        // 3. 初始化
        mac.init(keySpec);
        // 4. 执行计算
        return mac.doFinal(message.getBytes(StandardCharsets.UTF_8));
    }
    /**
     * 字节数组转十六进制（小写）
     */
    private static String bytesToHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(String.format("%02x", b & 0xff));
        }
        return sb.toString();
    }
    // 测试
    public static void main(String[] args) throws Exception {
        String key = "secret_key";
        String message = "Hello, HMAC-SHA1!";
        byte[] raw = hmacSha1(key, message);
        String hex = hmacSha1Hex(key, message);
        String base64 = hmacSha1Base64(key, message);
        System.out.println("原始字节长度: " + raw.length);   // 20
        System.out.println("十六进制: " + hex);              // 例如：c2e7b7e5...
        System.out.println("Base64: " + base64);            // 例如：wue35...
    }
}

public static byte[] hmacSha1Incremental(String key, String[] parts) throws Exception {
    Mac mac = Mac.getInstance("HmacSHA1");
    SecretKeySpec keySpec = new SecretKeySpec(
        key.getBytes(StandardCharsets.UTF_8), 
        "HmacSHA1"
    );
    mac.init(keySpec);
    for (String part : parts) {
        mac.update(part.getBytes(StandardCharsets.UTF_8));
    }
    return mac.doFinal(); // 无参数，返回前面所有 update 的总和
}