{"id":38,"date":"2026-04-30T23:39:43","date_gmt":"2026-04-30T15:39:43","guid":{"rendered":"https:\/\/www.orangejam.asia\/?p=38"},"modified":"2026-05-02T01:01:21","modified_gmt":"2026-05-01T17:01:21","slug":"%e5%88%ab%e8%ae%a9%e6%95%88%e7%8e%87%e5%87%ba%e5%8d%96%e4%ba%86%e4%bd%a0%e7%9a%84%e5%af%86%e9%92%a5%ef%bc%9a%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90%e5%b8%b8%e6%95%b0%e6%97%b6%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.orangejam.asia\/index.php\/2026\/04\/30\/%e5%88%ab%e8%ae%a9%e6%95%88%e7%8e%87%e5%87%ba%e5%8d%96%e4%ba%86%e4%bd%a0%e7%9a%84%e5%af%86%e9%92%a5%ef%bc%9a%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90%e5%b8%b8%e6%95%b0%e6%97%b6%e9%97%b4\/","title":{"rendered":"\u522b\u8ba9\u201c\u6548\u7387\u201d\u51fa\u5356\u4e86\u4f60\u7684\u5bc6\u94a5\uff1a\u6df1\u5165\u5256\u6790\u5e38\u6570\u65f6\u95f4\u5b57\u7b26\u4e32\u6bd4\u8f83"},"content":{"rendered":"\n<p>\u5728\u65e5\u5e38\u7684 Java \u5f00\u53d1\u4e2d\uff0c\u5f53\u6211\u4eec\u9700\u8981\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u7b49\u65f6\uff0c\u51e0\u4e4e\u6240\u6709\u4eba\u90fd\u4f1a\u4e0b\u610f\u8bc6\u5730\u6572\u51fa <code>a.equals(b)<\/code>\u3002\u4ece\u6027\u80fd\u548c\u4e1a\u52a1\u903b\u8f91\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u65e0\u53ef\u539a\u975e\u3002\u4f46\u5728\u6d89\u53ca\u9ad8\u5b89\u5168\u6027\u573a\u666f\uff08\u5982\u6821\u9a8c API Token\u3001Session ID\u3001HMAC \u7b7e\u540d\u6216\u5bc6\u7801\u54c8\u5e0c\uff09\u65f6\uff0c\u8fd9\u4e2a\u4e60\u60ef\u5374\u53ef\u80fd\u6084\u6084\u4e3a\u4f60\u655e\u5f00\u4e00\u6247\u540d\u4e3a\u8ba1\u65f6\u653b\u51fb\uff08Timing Attack\uff09\u7684\u540e\u95e8\u3002<\/p>\n\n\n\n<p>\u4eca\u5929\uff0c\u6211\u4eec\u901a\u8fc7\u4e00\u6bb5\u53ea\u6709\u5341\u51e0\u884c\u7684 Java \u4ee3\u7801\uff0c\u6765\u804a\u804a\u4e3a\u4ec0\u4e48\u201c\u9ad8\u6548\u201d\u6709\u65f6\u5019\u4e0d\u4ec5\u4e0d\u662f\u597d\u4e8b\uff0c\u53cd\u800c\u4f1a\u6210\u4e3a\u81f4\u547d\u7684\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<h3 class=\"wp-block-heading\">\u7ecf\u5178\u7684\u201c\u5c3d\u65e9\u8fd4\u56de\u201d\u9677\u9631<\/h3>\n\n\n\n<p>\u8981\u7406\u89e3\u8ba1\u65f6\u653b\u51fb\uff0c\u6211\u4eec\u9996\u5148\u8981\u770b\u770b\u666e\u901a\u7684 <code>String.equals()<\/code> \u662f\u600e\u4e48\u5de5\u4f5c\u7684\u3002\u5728\u5e95\u5c42\uff0c\u6807\u51c6\u7684\u5b57\u7b26\u4e32\u6bd4\u8f83\u903b\u8f91\u901a\u5e38\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u5148\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u4e0d\u540c\u5219\u76f4\u63a5\u8fd4\u56de <code>false<\/code>\u3002<\/li>\n\n\n\n<li>\u4ece\u7b2c\u4e00\u4e2a\u5b57\u7b26\u5f00\u59cb\u9010\u4e2a\u6bd4\u8f83\u3002<\/li>\n\n\n\n<li><strong>\u4e00\u65e6\u53d1\u73b0\u4e0d\u5339\u914d\u7684\u5b57\u7b26\uff0c\u7acb\u5373\u505c\u6b62\u5faa\u73af\u5e76\u8fd4\u56de <code>false<\/code>\uff08Fail-fast \u673a\u5236\uff09\u3002<\/strong><\/li>\n\n\n\n<li>\u5982\u679c\u5168\u90e8\u5faa\u73af\u5b8c\u90fd\u5339\u914d\uff0c\u8fd4\u56de <code>true<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u79cd\u201c\u5c3d\u65e9\u8fd4\u56de\u201d\u7684\u8bbe\u8ba1\u5728\u6027\u80fd\u4e0a\u662f\u6781\u81f4\u7684\u3002\u4f46\u5728\u9ed1\u5ba2\u773c\u91cc\uff0c<strong>\u6267\u884c\u65f6\u95f4\u7684\u957f\u77ed\uff0c\u6210\u4e86\u4e00\u53f0\u6cc4\u9732\u5bc6\u7801\u7684\u201c\u6d4b\u8c0e\u4eea\u201d<\/strong>\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\u670d\u52a1\u5668\u6709\u4e00\u6bb5\u6b63\u786e\u7684 Token \u662f <code>ABCDEFG<\/code>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f53\u653b\u51fb\u8005\u5c1d\u8bd5 <code>BBCDEFG<\/code> \u65f6\uff0c\u5728\u7b2c 1 \u4e2a\u5b57\u7b26\uff08<code>B<\/code> vs <code>A<\/code>\uff09\u5c31\u5931\u8d25\u4e86\uff0c\u8017\u65f6 1 \u6beb\u79d2\u3002<\/li>\n\n\n\n<li>\u5f53\u653b\u51fb\u8005\u5c1d\u8bd5 <code>AACDEFG<\/code> \u65f6\uff0c\u5728\u7b2c 2 \u4e2a\u5b57\u7b26\uff08<code>A<\/code> vs <code>B<\/code>\uff09\u624d\u5931\u8d25\uff0c\u8017\u65f6 2 \u6beb\u79d2\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u901a\u8fc7\u6781\u5176\u5fae\u5c0f\u7684\u65f6\u95f4\u5dee\uff0c\u653b\u51fb\u8005\u6839\u672c\u4e0d\u9700\u8981\u76f2\u731c\u6574\u4e2a\u5b57\u7b26\u4e32\u3002\u4ed6\u4eec\u53ea\u9700\u8981\u50cf\u7834\u89e3\u4fdd\u9669\u7bb1\u7684\u5bc6\u7801\u9501\u4e00\u6837\uff0c\u9010\u4f4d\u542c\u53d6\u201c\u5494\u54d2\u201d\u58f0\uff0c\u5c31\u80fd\u4ee5\u7ebf\u6027\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff08\u51e0\u5341\u6b21\u5c1d\u8bd5\uff09\u5c06\u7cfb\u7edf\u5bc6\u7801\u5b8c\u5168\u201c\u7206\u7834\u201d\u51fa\u6765\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e76\u975e\u675e\u4eba\u5fe7\u5929\uff1aRemote Timing Attacks are Practical<\/h3>\n\n\n\n<p>\u4f60\u53ef\u80fd\u4f1a\u89c9\u5f97\uff1a\u201c\u8fd9\u592a\u7406\u8bba\u5316\u4e86\u5427\uff1f\u670d\u52a1\u5668\u90e8\u7f72\u5728\u4e91\u7aef\uff0c\u7f51\u7edc\u5ef6\u8fdf\uff08Jitter\uff09\u52a8\u8f84\u51e0\u5341\u6beb\u79d2\uff0c\u8fd9\u79cd\u5fae\u79d2\u7ea7\u7684\u4ee3\u7801\u6267\u884c\u5dee\u5f02\uff0c\u600e\u4e48\u53ef\u80fd\u5728\u7f51\u7edc\u4f20\u8f93\u4e2d\u88ab\u6d4b\u91cf\u51fa\u6765\uff1f\u201d<\/p>\n\n\n\n<p>\u65e9\u5e74\u95f4\uff0c\u5b89\u5168\u754c\u4e5f\u662f\u8fd9\u4e48\u8ba4\u4e3a\u7684\uff0c\u76f4\u5230 2003 \u5e74\uff0c\u65af\u5766\u798f\u5927\u5b66\u7684 David Brumley \u548c Dan Boneh \u53d1\u8868\u4e86\u4e00\u7bc7\u9707\u60ca\u4e1a\u754c\u7684\u4f1a\u8bae\u8bba\u6587\uff1a<strong>\u300aRemote Timing Attacks are Practical\u300b\uff08\u8fdc\u7a0b\u8ba1\u65f6\u653b\u51fb\u662f\u5207\u5b9e\u53ef\u884c\u7684\uff09<\/strong>\u3002<\/p>\n\n\n\n<p>\u5728\u8fd9\u7bc7\u8bba\u6587\u4e2d\uff0c\u4f5c\u8005\u6210\u529f\u901a\u8fc7\u6821\u56ed\u7f51\u3001\u5171\u4eab\u4e3b\u673a\u4e0d\u540c\u8fdb\u7a0b\u548c\u865a\u62df\u673a\u591a\u4e2a\u73af\u5883\uff0c\u5bf9\u4e00\u53f0\u8fd0\u884c\u7740 OpenSSL \u7684\u670d\u52a1\u5668\u9488\u5bf9 RSA \u89e3\u5bc6\u64cd\u4f5c\u53d1\u8d77\u4e86\u8ba1\u65f6\u653b\u51fb\u3002\u5373\u4f7f\u7f51\u7edc\u4e2d\u5b58\u5728\u5de8\u5927\u7684\u5ef6\u8fdf\u548c\u6ce2\u52a8\uff0c\u901a\u8fc7\u53d1\u9001\u5927\u91cf\u7684\u8bf7\u6c42\u5e76\u5229\u7528\u7edf\u8ba1\u5b66\u65b9\u6cd5\uff08\u5982\u8fc7\u6ee4\u6389\u5f02\u5e38\u503c\u3001\u8ba1\u7b97\u5747\u503c\u548c\u65b9\u5dee\uff09\uff0c\u4ed6\u4eec\u6210\u529f\u63d0\u53d6\u4e86\u670d\u52a1\u5668\u7aef\u7528\u4e8e\u89e3\u5bc6\u7684 RSA \u79c1\u94a5\u3002<\/p>\n\n\n\n<p>\u8fd9\u7bc7\u8bba\u6587\u5f7b\u5e95\u6253\u7834\u4e86\u201c\u7f51\u7edc\u5ef6\u8fdf\u80fd\u63a9\u76d6\u8ba1\u65f6\u7279\u5f81\u201d\u7684\u5e7b\u60f3\u3002\u5b83\u6b8b\u9177\u5730\u5411\u5f00\u53d1\u8005\u8bc1\u660e\uff1a<strong>\u53ea\u8981\u4f60\u7684\u4ee3\u7801\u6267\u884c\u65f6\u95f4\u968f\u79d8\u5bc6\u6570\u636e\u7684\u4e0d\u540c\u800c\u53d8\u5316\uff0c\u653b\u51fb\u8005\u5c31\u80fd\u901a\u8fc7\u7edf\u8ba1\u5206\u6790\u5728\u8fdc\u7a0b\u628a\u79d8\u5bc6\u5077\u8d70\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u62c6\u89e3\u9632\u5fa1\u4ee3\u7801\uff1a<code>safeEqual<\/code> \u51fd\u6570<\/h3>\n\n\n\n<p>\u4e3a\u4e86\u9632\u6b62\u8fd9\u79cd\u653b\u51fb\uff0c\u6211\u4eec\u5c31\u9700\u8981\u8ba9\u201c\u5b57\u7b26\u4e32\u6bd4\u8f83\u201d\u8fd9\u4e2a\u52a8\u4f5c\u65e0\u8bba\u6210\u529f\u8fd8\u662f\u5931\u8d25\uff0c\u8017\u8d39\u7684\u65f6\u95f4\u90fd\u662f\u6052\u5b9a\u7684\uff08Constant-Time\uff09\u3002\u8fd9\u5c31\u5f15\u51fa\u4e86\u6211\u4eec\u4eca\u5929\u8981\u5206\u6790\u7684\u9632\u5fa1\u4ee3\u7801\uff1a<\/p>\n\n\n\n<p>Java<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>private static boolean safeEqual(String a, String b) {\n    \/\/ 1. \u957f\u5ea6\u6821\u9a8c\n    if (a.length() != b.length()) {\n        return false;\n    }\n\n    int equal = 0;\n    \/\/ 2. \u62d2\u7edd\u5c3d\u65e9\u8fd4\u56de\uff0c\u5f3a\u5236\u904d\u5386\u6574\u4e2a\u5b57\u7b26\u4e32\n    for (int i = 0; i &lt; a.length(); i++) {\n        \/\/ 3. \u4f4d\u8fd0\u7b97\u7684\u5de7\u5999\u8fd0\u7528\n        equal |= a.charAt(i) ^ b.charAt(i);\n    }\n    \n    \/\/ 4. \u6700\u7ec8\u5224\u5b9a\n    return equal == 0;\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6bb5\u4ee3\u7801\u867d\u7136\u77ed\u5c0f\uff0c\u4f46\u6bcf\u4e00\u884c\u90fd\u5145\u6ee1\u4e86\u5b89\u5168\u8003\u91cf\u3002\u5b83\u662f\u5982\u4f55\u5316\u89e3\u8ba1\u65f6\u653b\u51fb\u7684\uff1f<\/p>\n\n\n\n<p><strong>1. \u4e3a\u4ec0\u4e48\u4fdd\u7559\u4e86\u957f\u5ea6\u6bd4\u8f83\u7684\u201c\u5c3d\u65e9\u8fd4\u56de\u201d\uff1f<\/strong><\/p>\n\n\n\n<p>\u4f60\u53ef\u80fd\u6ce8\u610f\u5230\u4e86\uff0c\u4ee3\u7801\u4e00\u5f00\u59cb\u5982\u679c\u957f\u5ea6\u4e0d\u7b49\uff0c\u4f9d\u7136\u4f1a\u7acb\u523b\u8fd4\u56de\u3002\u8fd9\u4e0d\u662f\u4f1a\u6cc4\u9732\u5b57\u7b26\u4e32\u957f\u5ea6\u5417\uff1f<\/p>\n\n\n\n<p>\u6ca1\u9519\uff0c\u5b83\u786e\u5b9e\u4f1a\u6cc4\u9732\u957f\u5ea6\u3002\u4f46\u5728\u5bc6\u7801\u5b66\u7684\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd9\u6bb5\u4ee3\u7801\u901a\u5e38\u7528\u4e8e\u6bd4\u8f83 <strong>\u54c8\u5e0c\u503c\uff08\u5982 SHA-256\uff09<\/strong> \u6216 <strong>\u56fa\u5b9a\u957f\u5ea6\u7684 Token<\/strong>\u3002\u5bf9\u4e8e\u8fd9\u4e9b\u6570\u636e\uff0c\u5b83\u4eec\u7684\u957f\u5ea6\u672c\u8eab\u5c31\u662f\u516c\u5f00\u5df2\u77e5\u7684\u5b9a\u503c\uff08\u4f8b\u5982 SHA-256 \u6c38\u8fdc\u662f 64 \u4e2a\u5341\u516d\u8fdb\u5236\u5b57\u7b26\uff09\u3002\u56e0\u6b64\uff0c\u901a\u8fc7\u957f\u5ea6\u7b5b\u9009\u4e0d\u4ec5\u80fd\u9632\u6b62 <code>NullPointerException<\/code> \u6216\u8d8a\u754c\u5f02\u5e38\uff0c\u4e5f\u4e0d\u4f1a\u6cc4\u9732\u5b9e\u8d28\u6027\u7684\u654f\u611f\u4fe1\u606f\u3002<\/p>\n\n\n\n<p><strong>2. \u94c1\u9762\u65e0\u79c1\u7684 for \u5faa\u73af<\/strong><\/p>\n\n\n\n<p>\u4e0e <code>String.equals()<\/code> \u4e0d\u540c\uff0c\u8fd9\u91cc\u7684 <code>for<\/code> \u5faa\u73af\u5185\u90e8<strong>\u6ca1\u6709\u4efb\u4f55 <code>if<\/code> \u5224\u65ad\u548c <code>break<\/code> \u8bed\u53e5<\/strong>\u3002\u65e0\u8bba\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5728\u7b2c 1 \u4f4d\u4e0d\u540c\uff0c\u8fd8\u662f\u6700\u540e 1 \u4f4d\u4e0d\u540c\uff0c\u5b83\u90fd\u4f1a\u8001\u8001\u5b9e\u5b9e\u5730\u628a\u6574\u4e2a\u5faa\u73af\u8dd1\u5b8c\u3002\u8fd9\u5c31\u4ece\u6839\u672c\u4e0a\u62b9\u5e73\u4e86\u56e0\u4e3a\u201c\u5c3d\u65e9\u8fd4\u56de\u201d\u9020\u6210\u7684\u65f6\u95f4\u5dee\u3002<\/p>\n\n\n\n<p><strong>3. \u4f4d\u8fd0\u7b97\u9b54\u6cd5\uff1a\u5f02\u6216\uff08<code>^<\/code>\uff09\u4e0e\u6309\u4f4d\u6216\uff08<code>|<\/code>\uff09<\/strong><\/p>\n\n\n\n<p>\u7531\u4e8e\u4e0d\u80fd\u5728\u5faa\u73af\u91cc\u4f7f\u7528 <code>if (a.charAt(i) != b.charAt(i))<\/code>\uff08\u56e0\u4e3a\u5206\u652f\u9884\u6d4b\u673a\u5236\u672c\u8eab\u4e5f\u53ef\u80fd\u5e26\u6765\u5fae\u5c0f\u7684\u65f6\u95f4\u5dee\u5f02\uff09\uff0c\u4ee3\u7801\u91c7\u7528\u4e86\u6781\u5176\u5e95\u5c42\u7684\u4f4d\u8fd0\u7b97\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>a.charAt(i) ^ b.charAt(i)<\/code>\uff08\u5f02\u6216\uff09<\/strong>\uff1a\u5982\u679c\u4e24\u4e2a\u5b57\u7b26\u76f8\u540c\uff0c\u5f02\u6216\u7ed3\u679c\u4e3a <code>0<\/code>\uff1b\u5982\u679c\u4e0d\u540c\uff0c\u7ed3\u679c\u4e3a\u975e <code>0<\/code>\u3002<\/li>\n\n\n\n<li><strong><code>equal |= ...<\/code>\uff08\u6309\u4f4d\u6216\u5e76\u8d4b\u503c\uff09<\/strong>\uff1a\u53d8\u91cf <code>equal<\/code> \u521d\u59cb\u503c\u4e3a <code>0<\/code>\u3002\u53ea\u8981\u5728\u8fd9\u6f2b\u957f\u7684\u5faa\u73af\u4e2d\uff0c\u51fa\u73b0\u4e86\u54ea\u6015\u4e00\u6b21\u5b57\u7b26\u4e0d\u5339\u914d\uff08\u5373\u5f02\u6216\u7ed3\u679c\u4e0d\u4e3a <code>0<\/code>\uff09\uff0c<code>equal<\/code> \u7684\u67d0\u4e9b\u4e8c\u8fdb\u5236\u4f4d\u5c31\u4f1a\u88ab\u7f6e\u4e3a <code>1<\/code>\u3002\u4e00\u65e6\u88ab\u7f6e\u4e3a <code>1<\/code>\uff0c\u540e\u7eed\u65e0\u8bba\u600e\u4e48\u8ddf <code>0<\/code> \u8fdb\u884c\u6309\u4f4d\u6216\u8fd0\u7b97\uff0c\u5b83\u90fd\u6c38\u8fdc\u56de\u4e0d\u5230 <code>0<\/code> \u4e86\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>4. \u6700\u7ec8\u88c1\u51b3<\/strong><\/p>\n\n\n\n<p>\u5f53\u5faa\u73af\u7ed3\u675f\u65f6\uff0c\u6211\u4eec\u53ea\u9700\u8981\u770b\u770b <code>equal<\/code> \u8fd8\u662f\u4e0d\u662f\u6700\u521d\u7684\u90a3\u4e2a <code>0<\/code>\u3002\u5982\u679c\u662f\uff0c\u8bf4\u660e\u4e00\u8def\u8d70\u6765\u6ca1\u6709\u4efb\u4f55\u5dee\u5f02\uff1b\u5982\u679c\u4e0d\u662f\uff0c\u8bf4\u660e\u4e2d\u95f4\u81f3\u5c11\u6df7\u5165\u4e86\u4e00\u4e2a\u4e0d\u540c\u7684\u5b57\u7b26\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3<\/h3>\n\n\n\n<p>\u5728\u5b89\u5168\u9886\u57df\uff0c\u76f4\u89c9\u5f80\u5f80\u662f\u9760\u4e0d\u4f4f\u7684\u3002\u5199\u4e1a\u52a1\u903b\u8f91\u65f6\uff0c\u6211\u4eec\u603b\u662f\u8ffd\u6c42\u201c\u5929\u4e0b\u6b66\u529f\uff0c\u552f\u5feb\u4e0d\u7834\u201d\uff0c\u5c3d\u4e00\u5207\u53ef\u80fd\u526a\u679d\u4f18\u5316\uff1b\u4f46\u5728\u5199\u5b89\u5168\u903b\u8f91\u65f6\uff0c\u6211\u4eec\u53cd\u800c\u8981\u5b66\u4f1a\u201c\u7ed5\u8fdc\u8def\u201d\uff0c\u5f3a\u8feb\u7a0b\u5e8f\u53bb\u505a\u65e0\u7528\u529f\uff0c\u4ee5\u6b64\u6765\u63a9\u76d6\u771f\u5b9e\u7684\u6267\u884c\u8f68\u8ff9\u3002<\/p>\n\n\n\n<p>\u4e0b\u6b21\u5728\u4ee3\u7801\u91cc\u6821\u9a8c\u5bc6\u7801\u3001Token \u6216\u7b7e\u540d\u65f6\uff0c\u8bf7\u56de\u60f3\u4e00\u4e0b\u300aRemote Timing Attacks are Practical\u300b\u5e26\u6765\u7684\u6559\u8bad\u3002\u4e0d\u8981\u76f4\u63a5\u4f7f\u7528 <code>==<\/code> \u6216 <code>.equals()<\/code>\uff0c\u4f7f\u7528\u50cf\u672c\u6587\u4e2d <code>safeEqual<\/code> \u8fd9\u6837\u7684\u5e38\u6570\u65f6\u95f4\u6bd4\u8f83\u7b97\u6cd5\uff08\u6216\u8005\u76f4\u63a5\u8c03\u7528 Java \u5b98\u65b9\u63d0\u4f9b\u7684 <code>MessageDigest.isEqual()<\/code>\uff09\u3002<\/p>\n\n\n\n<p>\u591a\u8d39\u7684\u90a3\u51e0\u5fae\u79d2 CPU \u65f6\u95f4\uff0c\u53ef\u80fd\u4f1a\u5e2e\u4f60\u7701\u4e0b\u767e\u4e07\u7ea7\u522b\u7684\u5b89\u5168\u4e8b\u6545\u516c\u5173\u8d39\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u65e5\u5e38\u7684 Java \u5f00\u53d1\u4e2d\uff0c\u5f53\u6211\u4eec\u9700\u8981\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u7b49\u65f6\uff0c\u51e0\u4e4e\u6240\u6709\u4eba\u90fd\u4f1a\u4e0b\u610f\u8bc6\u5730\u6572\u51fa a.equals( &hellip; <a href=\"https:\/\/www.orangejam.asia\/index.php\/2026\/04\/30\/%e5%88%ab%e8%ae%a9%e6%95%88%e7%8e%87%e5%87%ba%e5%8d%96%e4%ba%86%e4%bd%a0%e7%9a%84%e5%af%86%e9%92%a5%ef%bc%9a%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90%e5%b8%b8%e6%95%b0%e6%97%b6%e9%97%b4\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201c\u522b\u8ba9\u201c\u6548\u7387\u201d\u51fa\u5356\u4e86\u4f60\u7684\u5bc6\u94a5\uff1a\u6df1\u5165\u5256\u6790\u5e38\u6570\u65f6\u95f4\u5b57\u7b26\u4e32\u6bd4\u8f83\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-38","post","type-post","status-publish","format-standard","hentry","category-5"],"_links":{"self":[{"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/posts\/38","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":1,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions"}],"predecessor-version":[{"id":39,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions\/39"}],"wp:attachment":[{"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/media?parent=38"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/categories?post=38"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.orangejam.asia\/index.php\/wp-json\/wp\/v2\/tags?post=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}