59 lines
2.0 KiB
Java
59 lines
2.0 KiB
Java
package com.rj.util;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Map;
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import java.util.TreeMap;
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import java.util.stream.Collectors;
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/** hxrd 前端 {@code getSignHeader} 对应的 SHA256 签名。 */
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public final class HxrGoodsSignUtil {
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private HxrGoodsSignUtil() {}
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/**
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* 按前端规则生成签名：参数键排序 → {@code k=v&...} → 拼接 appStr → SHA256 hex。
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*
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* @param params 请求参数 + {@code timestamp} + {@code noncestr}
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* @param appStr 前端 configs.appStr
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*/
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public static String computeSign(Map<String, Object> params, String appStr) {
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TreeMap<String, Object> sorted = new TreeMap<>();
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if (params != null) {
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for (Map.Entry<String, Object> entry : params.entrySet()) {
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Object value = entry.getValue();
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if (value == null) {
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continue;
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}
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String text = String.valueOf(value);
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if (text.isEmpty()) {
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continue;
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}
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sorted.put(entry.getKey(), value);
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}
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}
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String payload = sorted.entrySet().stream()
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.map(e -> e.getKey() + "=" + e.getValue())
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.collect(Collectors.joining("&"));
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if (appStr != null && !appStr.isEmpty()) {
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payload += appStr;
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}
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return sha256Hex(payload);
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}
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private static String sha256Hex(String input) {
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try {
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MessageDigest digest = MessageDigest.getInstance("SHA-256");
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byte[] hash = digest.digest(input.getBytes(StandardCharsets.UTF_8));
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StringBuilder sb = new StringBuilder(hash.length * 2);
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for (byte b : hash) {
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sb.append(String.format("%02x", b));
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}
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return sb.toString();
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} catch (NoSuchAlgorithmException e) {
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throw new IllegalStateException("SHA-256 not available", e);
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}
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}
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}
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