{"id":779,"date":"2024-12-27T12:46:55","date_gmt":"2024-12-27T04:46:55","guid":{"rendered":"https:\/\/www.ikaros.love\/?p=779"},"modified":"2024-12-27T12:46:55","modified_gmt":"2024-12-27T04:46:55","slug":"%e5%a6%82%e4%bd%95%e5%af%b9%e6%95%b0%e6%8d%ae%e8%bf%9b%e8%a1%8c%e6%91%98%e8%a6%81","status":"publish","type":"post","link":"https:\/\/www.ikaros.love\/?p=779","title":{"rendered":"\u5982\u4f55\u5bf9\u6570\u636e\u8fdb\u884c\u6458\u8981"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"512\" height=\"512\" src=\"https:\/\/www.ikaros.love\/wp-content\/uploads\/2024\/12\/508.png\" alt=\"\" class=\"wp-image-780\" srcset=\"https:\/\/www.ikaros.love\/wp-content\/uploads\/2024\/12\/508.png 512w, https:\/\/www.ikaros.love\/wp-content\/uploads\/2024\/12\/508-300x300.png 300w, https:\/\/www.ikaros.love\/wp-content\/uploads\/2024\/12\/508-150x150.png 150w, https:\/\/www.ikaros.love\/wp-content\/uploads\/2024\/12\/508-200x200.png 200w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/><\/figure>\n\n\n\n<p>\u54c8\u5e0c\u7b97\u6cd5\uff08Hash\uff09\u53c8\u79f0\u6458\u8981\u7b97\u6cd5\uff08Digest\uff09\uff0c\u5b83\u7684\u4f5c\u7528\u662f\uff1a\u5bf9\u4efb\u610f\u4e00\u7ec4\u8f93\u5165\u6570\u636e\u8fdb\u884c\u8ba1\u7b97\uff0c\u5f97\u5230\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u8f93\u51fa\u6458\u8981\u3002<\/p>\n\n\n\n<p>\u54c8\u5e0c\u7b97\u6cd5\u6700\u91cd\u8981\u7684\u7279\u70b9\u5c31\u662f\uff1a<\/p>\n\n\n\n<ul>\n<li>\u76f8\u540c\u7684\u8f93\u5165\u4e00\u5b9a\u5f97\u5230\u76f8\u540c\u7684\u8f93\u51fa\uff1b<\/li>\n\n\n\n<li>\u4e0d\u540c\u7684\u8f93\u5165\u5927\u6982\u7387\u5f97\u5230\u4e0d\u540c\u7684\u8f93\u51fa\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u54c8\u5e0c\u7b97\u6cd5\u7684\u76ee\u7684\u5c31\u662f\u4e3a\u4e86\u9a8c\u8bc1\u539f\u59cb\u6570\u636e\u662f\u5426\u88ab\u7be1\u6539\u3002<\/p>\n\n\n\n<p>Java\u5b57\u7b26\u4e32\u7684<code>hashCode()<\/code>\u5c31\u662f\u4e00\u4e2a\u54c8\u5e0c\u7b97\u6cd5\uff0c\u5b83\u7684\u8f93\u5165\u662f\u4efb\u610f\u5b57\u7b26\u4e32\uff0c\u8f93\u51fa\u662f\u56fa\u5b9a\u76844\u5b57\u8282<code>int<\/code>\u6574\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"hello\".hashCode(); \/\/ 0x5e918d2\n\"hello, java\".hashCode(); \/\/ 0x7a9d88e8\n\"hello, bob\".hashCode(); \/\/ 0xa0dbae2f\n<\/code><\/pre>\n\n\n\n<p>\u4e24\u4e2a\u76f8\u540c\u7684\u5b57\u7b26\u4e32\u6c38\u8fdc\u4f1a\u8ba1\u7b97\u51fa\u76f8\u540c\u7684<code>hashCode<\/code>\uff0c\u5426\u5219\u57fa\u4e8e<code>hashCode<\/code>\u5b9a\u4f4d\u7684<code>HashMap<\/code>\u5c31\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5f53\u6211\u4eec\u81ea\u5b9a\u4e49\u4e00\u4e2aclass\u65f6\uff0c\u8986\u5199<code>equals()<\/code>\u65b9\u6cd5\u65f6\u6211\u4eec\u5fc5\u987b\u6b63\u786e\u8986\u5199<code>hashCode()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u54c8\u5e0c\u78b0\u649e<\/h3>\n\n\n\n<p>\u54c8\u5e0c\u78b0\u649e\u662f\u6307\uff0c\u4e24\u4e2a\u4e0d\u540c\u7684\u8f93\u5165\u5f97\u5230\u4e86\u76f8\u540c\u7684\u8f93\u51fa\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"AaAaAa\".hashCode(); \/\/ 0x7460e8c0\n\"BBAaBB\".hashCode(); \/\/ 0x7460e8c0\n<\/code><\/pre>\n\n\n\n<p>\u6709\u7ae5\u978b\u4f1a\u95ee\uff1a\u78b0\u649e\u80fd\u4e0d\u80fd\u907f\u514d\uff1f\u7b54\u6848\u662f\u4e0d\u80fd\u3002\u78b0\u649e\u662f\u4e00\u5b9a\u4f1a\u51fa\u73b0\u7684\uff0c\u56e0\u4e3a\u8f93\u51fa\u7684\u5b57\u8282\u957f\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c<code>String<\/code>\u7684<code>hashCode()<\/code>\u8f93\u51fa\u662f4\u5b57\u8282\u6574\u6570\uff0c\u6700\u591a\u53ea\u67094294967296\u79cd\u8f93\u51fa\uff0c\u4f46\u8f93\u5165\u7684\u6570\u636e\u957f\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\uff0c\u6709\u65e0\u6570\u79cd\u8f93\u5165\u3002\u6240\u4ee5\uff0c\u54c8\u5e0c\u7b97\u6cd5\u662f\u628a\u4e00\u4e2a\u65e0\u9650\u7684\u8f93\u5165\u96c6\u5408\u6620\u5c04\u5230\u4e00\u4e2a\u6709\u9650\u7684\u8f93\u51fa\u96c6\u5408\uff0c\u5fc5\u7136\u4f1a\u4ea7\u751f\u78b0\u649e\u3002<\/p>\n\n\n\n<p>\u78b0\u649e\u4e0d\u53ef\u6015\uff0c\u6211\u4eec\u62c5\u5fc3\u7684\u4e0d\u662f\u78b0\u649e\uff0c\u800c\u662f\u78b0\u649e\u7684\u6982\u7387\uff0c\u56e0\u4e3a\u78b0\u649e\u6982\u7387\u7684\u9ad8\u4f4e\u5173\u7cfb\u5230\u54c8\u5e0c\u7b97\u6cd5\u7684\u5b89\u5168\u6027\u3002\u4e00\u4e2a\u5b89\u5168\u7684\u54c8\u5e0c\u7b97\u6cd5\u5fc5\u987b\u6ee1\u8db3\uff1a<\/p>\n\n\n\n<ul>\n<li>\u78b0\u649e\u6982\u7387\u4f4e\uff1b<\/li>\n\n\n\n<li>\u4e0d\u80fd\u731c\u6d4b\u8f93\u51fa\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u80fd\u731c\u6d4b\u8f93\u51fa\u662f\u6307\uff0c\u8f93\u5165\u7684\u4efb\u610f\u4e00\u4e2abit\u7684\u53d8\u5316\u4f1a\u9020\u6210\u8f93\u51fa\u5b8c\u5168\u4e0d\u540c\uff0c\u8fd9\u6837\u5c31\u5f88\u96be\u4ece\u8f93\u51fa\u53cd\u63a8\u8f93\u5165\uff08\u53ea\u80fd\u4f9d\u9760\u66b4\u529b\u7a77\u4e3e\uff09\u3002\u5047\u8bbe\u4e00\u79cd\u54c8\u5e0c\u7b97\u6cd5\u6709\u5982\u4e0b\u89c4\u5f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>hashA(\"java001\") = \"123456\"\nhashA(\"java002\") = \"123457\"\nhashA(\"java003\") = \"123458\"\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u5f88\u5bb9\u6613\u4ece\u8f93\u51fa<code>123459<\/code>\u53cd\u63a8\u8f93\u5165\uff0c\u8fd9\u79cd\u54c8\u5e0c\u7b97\u6cd5\u5c31\u4e0d\u5b89\u5168\u3002\u5b89\u5168\u7684\u54c8\u5e0c\u7b97\u6cd5\u4ece\u8f93\u51fa\u662f\u770b\u4e0d\u51fa\u4efb\u4f55\u89c4\u5f8b\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>hashB(\"java001\") = \"123456\"\nhashB(\"java002\") = \"580271\"\nhashB(\"java003\") = ???\n<\/code><\/pre>\n\n\n\n<p>\u5e38\u7528\u7684\u54c8\u5e0c\u7b97\u6cd5\u6709\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7b97\u6cd5<\/th><th>\u8f93\u51fa\u957f\u5ea6\uff08\u4f4d\uff09<\/th><th>\u8f93\u51fa\u957f\u5ea6\uff08\u5b57\u8282\uff09<\/th><\/tr><\/thead><tbody><tr><td>MD5<\/td><td>128 bits<\/td><td>16 bytes<\/td><\/tr><tr><td>SHA-1<\/td><td>160 bits<\/td><td>20 bytes<\/td><\/tr><tr><td>RipeMD-160<\/td><td>160 bits<\/td><td>20 bytes<\/td><\/tr><tr><td>SHA-256<\/td><td>256 bits<\/td><td>32 bytes<\/td><\/tr><tr><td>SHA-512<\/td><td>512 bits<\/td><td>64 bytes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u6839\u636e\u78b0\u649e\u6982\u7387\uff0c\u54c8\u5e0c\u7b97\u6cd5\u7684\u8f93\u51fa\u957f\u5ea6\u8d8a\u957f\uff0c\u5c31\u8d8a\u96be\u4ea7\u751f\u78b0\u649e\uff0c\u4e5f\u5c31\u8d8a\u5b89\u5168\u3002<\/p>\n\n\n\n<p>Java\u6807\u51c6\u5e93\u63d0\u4f9b\u4e86\u5e38\u7528\u7684\u54c8\u5e0c\u7b97\u6cd5\uff0c\u5e76\u4e14\u6709\u4e00\u5957\u7edf\u4e00\u7684\u63a5\u53e3\u3002\u6211\u4eec\u4ee5MD5\u7b97\u6cd5\u4e3a\u4f8b\uff0c\u770b\u770b\u5982\u4f55\u5bf9\u8f93\u5165\u8ba1\u7b97\u54c8\u5e0c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.security.MessageDigest;\nimport java.util.HexFormat;\n\npublic class Main {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ \u521b\u5efa\u4e00\u4e2aMessageDigest\u5b9e\u4f8b:\n        MessageDigest md = MessageDigest.getInstance(\"MD5\");\n        \/\/ \u53cd\u590d\u8c03\u7528update\u8f93\u5165\u6570\u636e:\n        md.update(\"Hello\".getBytes(\"UTF-8\"));\n        md.update(\"World\".getBytes(\"UTF-8\"));\n        byte&#91;] result = md.digest(); \/\/ 16 bytes: 68e109f0f40ca72a15e05cc22786f8e6\n        System.out.println(HexFormat.of().formatHex(result));\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528<code>MessageDigest<\/code>\u65f6\uff0c\u6211\u4eec\u9996\u5148\u6839\u636e\u54c8\u5e0c\u7b97\u6cd5\u83b7\u53d6\u4e00\u4e2a<code>MessageDigest<\/code>\u5b9e\u4f8b\uff0c\u7136\u540e\uff0c\u53cd\u590d\u8c03\u7528<code>update(byte[])<\/code>\u8f93\u5165\u6570\u636e\u3002\u5f53\u8f93\u5165\u7ed3\u675f\u540e\uff0c\u8c03\u7528<code>digest()<\/code>\u65b9\u6cd5\u83b7\u5f97byte[]\u6570\u7ec4\u8868\u793a\u7684\u6458\u8981\uff0c\u6700\u540e\uff0c\u628a\u5b83\u8f6c\u6362\u4e3a\u5341\u516d\u8fdb\u5236\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n<p>\u8fd0\u884c\u4e0a\u8ff0\u4ee3\u7801\uff0c\u53ef\u4ee5\u5f97\u5230\u8f93\u5165<code>HelloWorld<\/code>\u7684MD5\u662f<code>68e109f0f40ca72a15e05cc22786f8e6<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u54c8\u5e0c\u7b97\u6cd5\u7684\u7528\u9014<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u76f8\u540c\u7684\u8f93\u5165\u6c38\u8fdc\u4f1a\u5f97\u5230\u76f8\u540c\u7684\u8f93\u51fa\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u8f93\u5165\u88ab\u4fee\u6539\u4e86\uff0c\u5f97\u5230\u7684\u8f93\u51fa\u5c31\u4f1a\u4e0d\u540c\u3002<\/p>\n\n\n\n<p>\u5982\u4f55\u5224\u65ad\u4e0b\u8f7d\u5230\u672c\u5730\u7684\u8f6f\u4ef6\u662f\u539f\u59cb\u7684\u3001\u672a\u7ecf\u7be1\u6539\u7684\u6587\u4ef6\uff1f\u6211\u4eec\u53ea\u9700\u8981\u81ea\u5df1\u8ba1\u7b97\u4e00\u4e0b\u672c\u5730\u6587\u4ef6\u7684\u54c8\u5e0c\u503c\uff0c\u518d\u4e0e\u5b98\u7f51\u516c\u5f00\u7684\u54c8\u5e0c\u503c\u5bf9\u6bd4\uff0c\u5982\u679c\u76f8\u540c\uff0c\u8bf4\u660e\u6587\u4ef6\u4e0b\u8f7d\u6b63\u786e\uff0c\u5426\u5219\uff0c\u8bf4\u660e\u6587\u4ef6\u5df2\u88ab\u7be1\u6539\u3002<\/p>\n\n\n\n<p>\u54c8\u5e0c\u7b97\u6cd5\u7684\u53e6\u4e00\u4e2a\u91cd\u8981\u7528\u9014\u662f\u5b58\u50a8\u7528\u6237\u53e3\u4ee4\u3002\u5982\u679c\u76f4\u63a5\u5c06\u7528\u6237\u7684\u539f\u59cb\u53e3\u4ee4\u5b58\u653e\u5230\u6570\u636e\u5e93\u4e2d\uff0c\u4f1a\u4ea7\u751f\u6781\u5927\u7684\u5b89\u5168\u98ce\u9669\uff1a<\/p>\n\n\n\n<ul>\n<li>\u6570\u636e\u5e93\u7ba1\u7406\u5458\u80fd\u591f\u770b\u5230\u7528\u6237\u660e\u6587\u53e3\u4ee4\uff1b<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u6570\u636e\u4e00\u65e6\u6cc4\u6f0f\uff0c\u9ed1\u5ba2\u5373\u53ef\u83b7\u53d6\u7528\u6237\u660e\u6587\u53e3\u4ee4\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u5b58\u50a8\u7528\u6237\u7684\u539f\u59cb\u53e3\u4ee4\uff0c\u90a3\u4e48\u5982\u4f55\u5bf9\u7528\u6237\u8fdb\u884c\u8ba4\u8bc1\uff1f<\/p>\n\n\n\n<p>\u65b9\u6cd5\u662f\u5b58\u50a8\u7528\u6237\u53e3\u4ee4\u7684\u54c8\u5e0c\uff0c\u4f8b\u5982\uff0cMD5\u3002<\/p>\n\n\n\n<p>\u5728\u7528\u6237\u8f93\u5165\u539f\u59cb\u53e3\u4ee4\u540e\uff0c\u7cfb\u7edf\u8ba1\u7b97\u7528\u6237\u8f93\u5165\u7684\u539f\u59cb\u53e3\u4ee4\u7684MD5\u5e76\u4e0e\u6570\u636e\u5e93\u5b58\u50a8\u7684MD5\u5bf9\u6bd4\uff0c\u5982\u679c\u4e00\u81f4\uff0c\u8bf4\u660e\u53e3\u4ee4\u6b63\u786e\uff0c\u5426\u5219\uff0c\u53e3\u4ee4\u9519\u8bef\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u6570\u636e\u5e93\u5b58\u50a8\u7528\u6237\u540d\u548c\u53e3\u4ee4\u7684\u8868\u5185\u5bb9\u5e94\u8be5\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>username<\/th><th>password<\/th><\/tr><\/thead><tbody><tr><td>bob<\/td><td>f30aa7a662c728b7407c54ae6bfd27d1<\/td><\/tr><tr><td>alice<\/td><td>25d55ad283aa400af464c76d713c07ad<\/td><\/tr><tr><td>tim<\/td><td>bed128365216c019988915ed3add75fb<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u6570\u636e\u5e93\u7ba1\u7406\u5458\u770b\u4e0d\u5230\u7528\u6237\u7684\u539f\u59cb\u53e3\u4ee4\u3002\u5373\u4f7f\u6570\u636e\u5e93\u6cc4\u6f0f\uff0c\u9ed1\u5ba2\u4e5f\u65e0\u6cd5\u62ff\u5230\u7528\u6237\u7684\u539f\u59cb\u53e3\u4ee4\u3002\u60f3\u8981\u62ff\u5230\u7528\u6237\u7684\u539f\u59cb\u53e3\u4ee4\uff0c\u5fc5\u987b\u7528\u66b4\u529b\u7a77\u4e3e\u7684\u65b9\u6cd5\uff0c\u4e00\u4e2a\u53e3\u4ee4\u4e00\u4e2a\u53e3\u4ee4\u5730\u8bd5\uff0c\u76f4\u5230\u67d0\u4e2a\u53e3\u4ee4\u8ba1\u7b97\u7684MD5\u6070\u597d\u7b49\u4e8e\u6307\u5b9a\u503c\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u54c8\u5e0c\u53e3\u4ee4\u65f6\uff0c\u8fd8\u8981\u6ce8\u610f\u9632\u6b62\u5f69\u8679\u8868\u653b\u51fb\u3002<\/p>\n\n\n\n<p>\u4e0a\u9762\u8bb2\u5230\u4e86\uff0c\u5982\u679c\u53ea\u62ff\u5230MD5\uff0c\u4eceMD5\u53cd\u63a8\u660e\u6587\u53e3\u4ee4\uff0c\u53ea\u80fd\u4f7f\u7528\u66b4\u529b\u7a77\u4e3e\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u7136\u800c\u9ed1\u5ba2\u5e76\u4e0d\u7b28\uff0c\u66b4\u529b\u7a77\u4e3e\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u7b97\u529b\u548c\u65f6\u95f4\u3002\u4f46\u662f\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u9884\u5148\u8ba1\u7b97\u597d\u7684\u5e38\u7528\u53e3\u4ee4\u548c\u5b83\u4eec\u7684MD5\u7684\u5bf9\u7167\u8868\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5e38\u7528\u53e3\u4ee4<\/th><th>MD5<\/th><\/tr><\/thead><tbody><tr><td>hello123<\/td><td>f30aa7a662c728b7407c54ae6bfd27d1<\/td><\/tr><tr><td>12345678<\/td><td>25d55ad283aa400af464c76d713c07ad<\/td><\/tr><tr><td>passw0rd<\/td><td>bed128365216c019988915ed3add75fb<\/td><\/tr><tr><td>19700101<\/td><td>570da6d5277a646f6552b8832012f5dc<\/td><\/tr><tr><td>\u2026<\/td><td>\u2026<\/td><\/tr><tr><td>20201231<\/td><td>6879c0ae9117b50074ce0a0d4c843060<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u4e2a\u8868\u5c31\u662f\u5f69\u8679\u8868\u3002\u5982\u679c\u7528\u6237\u4f7f\u7528\u4e86\u5e38\u7528\u53e3\u4ee4\uff0c\u9ed1\u5ba2\u4eceMD5\u4e00\u4e0b\u5c31\u80fd\u53cd\u67e5\u5230\u539f\u59cb\u53e3\u4ee4\uff1a<\/p>\n\n\n\n<p>bob\u7684MD5\uff1a<code>f30aa7a662c728b7407c54ae6bfd27d1<\/code>\uff0c\u539f\u59cb\u53e3\u4ee4\uff1a<code>hello123<\/code>\uff1b<\/p>\n\n\n\n<p>alice\u7684MD5\uff1a<code>25d55ad283aa400af464c76d713c07ad<\/code>\uff0c\u539f\u59cb\u53e3\u4ee4\uff1a<code>12345678<\/code>\uff1b<\/p>\n\n\n\n<p>tim\u7684MD5\uff1a<code>bed128365216c019988915ed3add75fb<\/code>\uff0c\u539f\u59cb\u53e3\u4ee4\uff1a<code>passw0rd<\/code>\u3002<\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4e0d\u8981\u4f7f\u7528\u5e38\u7528\u5bc6\u7801\uff0c\u4ee5\u53ca\u4e0d\u8981\u4f7f\u7528\u751f\u65e5\u4f5c\u4e3a\u5bc6\u7801\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n<p>\u5373\u4f7f\u7528\u6237\u4f7f\u7528\u4e86\u5e38\u7528\u53e3\u4ee4\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u91c7\u53d6\u63aa\u65bd\u6765\u62b5\u5fa1\u5f69\u8679\u8868\u653b\u51fb\uff0c\u65b9\u6cd5\u662f\u5bf9\u6bcf\u4e2a\u53e3\u4ee4\u989d\u5916\u6dfb\u52a0\u968f\u673a\u6570\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u79f0\u4e4b\u4e3a\u52a0\u76d0\uff08salt\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>digest = md5(salt+inputPassword)\n<\/code><\/pre>\n\n\n\n<p>\u7ecf\u8fc7\u52a0\u76d0\u5904\u7406\u7684\u6570\u636e\u5e93\u8868\uff0c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>username<\/th><th>salt<\/th><th>password<\/th><\/tr><\/thead><tbody><tr><td>bob<\/td><td>H1r0a<\/td><td>a5022319ff4c56955e22a74abcc2c210<\/td><\/tr><tr><td>alice<\/td><td>7$p2w<\/td><td>e5de688c99e961ed6e560b972dab8b6a<\/td><\/tr><tr><td>tim<\/td><td>z5Sk9<\/td><td>1eee304b92dc0d105904e7ab58fd2f64<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u52a0\u76d0\u7684\u76ee\u7684\u5728\u4e8e\u4f7f\u9ed1\u5ba2\u7684\u5f69\u8679\u8868\u5931\u6548\uff0c\u5373\u4f7f\u7528\u6237\u4f7f\u7528\u5e38\u7528\u53e3\u4ee4\uff0c\u4e5f\u65e0\u6cd5\u4eceMD5\u53cd\u63a8\u539f\u59cb\u53e3\u4ee4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SHA-1<\/h3>\n\n\n\n<p>SHA-1\u4e5f\u662f\u4e00\u79cd\u54c8\u5e0c\u7b97\u6cd5\uff0c\u5b83\u7684\u8f93\u51fa\u662f160 bits\uff0c\u537320\u5b57\u8282\u3002SHA-1\u662f\u7531\u7f8e\u56fd\u56fd\u5bb6\u5b89\u5168\u5c40\u5f00\u53d1\u7684\uff0cSHA\u7b97\u6cd5\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u7cfb\u5217\uff0c\u5305\u62ecSHA-0\uff08\u5df2\u5e9f\u5f03\uff09\u3001SHA-1\u3001SHA-256\u3001SHA-512\u7b49\u3002<\/p>\n\n\n\n<p>\u5728Java\u4e2d\u4f7f\u7528SHA-1\uff0c\u548cMD5\u5b8c\u5168\u4e00\u6837\uff0c\u53ea\u9700\u8981\u628a\u7b97\u6cd5\u540d\u79f0\u6539\u4e3a<code>\"SHA-1\"<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.security.MessageDigest;\nimport java.util.HexFormat;\n\npublic class Main {\n    public static void main(String&#91;] args) throws Exception {\n        \/\/ \u521b\u5efa\u4e00\u4e2aMessageDigest\u5b9e\u4f8b:\n        MessageDigest md = MessageDigest.getInstance(\"SHA-1\");\n        \/\/ \u53cd\u590d\u8c03\u7528update\u8f93\u5165\u6570\u636e:\n        md.update(\"Hello\".getBytes(\"UTF-8\"));\n        md.update(\"World\".getBytes(\"UTF-8\"));\n        byte&#91;] result = md.digest(); \/\/ 20 bytes: db8ac1c259eb89d4a131b253bacfca5f319d54f2\n        System.out.println(HexFormat.of().formatHex(result));\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u7c7b\u4f3c\u7684\uff0c\u8ba1\u7b97SHA-256\uff0c\u6211\u4eec\u9700\u8981\u4f20\u5165\u540d\u79f0<code>\"SHA-256\"<\/code>\uff0c\u8ba1\u7b97SHA-512\uff0c\u6211\u4eec\u9700\u8981\u4f20\u5165\u540d\u79f0<code>\"SHA-512\"<\/code>\u3002Java\u6807\u51c6\u5e93\u652f\u6301\u7684\u6240\u6709\u54c8\u5e0c\u7b97\u6cd5\u53ef\u4ee5\u5728<a href=\"https:\/\/docs.oracle.com\/en\/java\/javase\/21\/docs\/specs\/security\/standard-names.html#messagedigest-algorithms\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fd9\u91cc<\/a>\u67e5\u5230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u54c8\u5e0c\u7b97\u6cd5\uff08Hash\uff09\u53c8\u79f0\u6458\u8981\u7b97\u6cd5&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":780,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[197,198,195,196],"_links":{"self":[{"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/posts\/779"}],"collection":[{"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=779"}],"version-history":[{"count":1,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/posts\/779\/revisions"}],"predecessor-version":[{"id":781,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/posts\/779\/revisions\/781"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=\/wp\/v2\/media\/780"}],"wp:attachment":[{"href":"https:\/\/www.ikaros.love\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ikaros.love\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}