com.aiwiown.face.internal.safe.HmacSha1Sign Maven / Gradle / Ivy

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package com.aiwiown.face.internal.safe;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
import java.util.Random;
 
public class HmacSha1Sign {
 
    /**
     * 生成签名字段
     *
     * @param apiKey
     * @param secretKey
     * @param expired
     * @return
     * @throws Exception
     */
    public static String genSign(String apiKey,  String secretKey, long expired) throws Exception {
        long now = System.currentTimeMillis() / 1000;
        int rdm = Math.abs(new Random().nextInt());
        String plainText = String.format("a=%s&b=%d&c=%d&d=%d", apiKey, now + expired, now, rdm);
        byte[] hmacDigest = HmacSha1(plainText, secretKey);
        byte[] signContent = new byte[hmacDigest.length + plainText.getBytes().length];
        System.arraycopy(hmacDigest, 0, signContent, 0, hmacDigest.length);
        System.arraycopy(plainText.getBytes(), 0, signContent, hmacDigest.length,
                plainText.getBytes().length);
        return encodeToBase64(signContent).replaceAll("[\\s*\t\n\r]", "");
    }
 
    /**
     * 生成 base64 编码
     *
     * @param binaryData
     * @return
     */
    public static String encodeToBase64(byte[] binaryData) {
        String encodedStr = Base64.getEncoder().encodeToString(binaryData);
        return encodedStr;
    }
 
    /**
     * 生成 hmacsha1 签名
     *
     * @param binaryData
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] HmacSha1(byte[] binaryData, String key) throws Exception {
        Mac mac = Mac.getInstance("HmacSHA1");
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "HmacSHA1");
        mac.init(secretKey);
        byte[] HmacSha1Digest = mac.doFinal(binaryData);
        return HmacSha1Digest;
    }
 
    /**
     * 生成 hmacsha1 签名
     *
     * @param plainText
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] HmacSha1(String plainText, String key) throws Exception {
        return HmacSha1(plainText.getBytes(), key);
    }
}