{"id":206986,"date":"2025-07-08T09:11:31","date_gmt":"2025-07-08T01:11:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206986\/"},"modified":"2025-07-08T09:11:31","modified_gmt":"2025-07-08T01:11:31","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-golang-%e5%8c%85-bcrypt-%e8%83%bd%e5%a4%9f%e5%9c%a8%e6%95%a3%e5%88%97%e5%af%86%e7%a0%81%e5%90%8e%e6%a3%80%e7%b4%a2%e7%9b%90%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206986\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 golang \u5305 bcrypt \u80fd\u591f\u5728\u6563\u5217\u5bc6\u7801\u540e\u68c0\u7d22\u76d0\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4e3a\u4ec0\u4e48 golang \u5305 bcrypt \u80fd\u591f\u5728\u6563\u5217\u5bc6\u7801\u540e\u68c0\u7d22\u76d0\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-19 11:45:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300a\u4e3a\u4ec0\u4e48 golang \u5305 bcrypt \u80fd\u591f\u5728\u6563\u5217\u5bc6\u7801\u540e\u68c0\u7d22\u76d0\uff1f\u300b\uff0c\u8986\u76d6\u4e86Golang\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u65e0\u6cd5\u7406\u89e3 golang crypto bcrypt \u5b58\u50a8\u5e93\u4e2d\u7684\u4ee5\u4e0b\u4ee3\u7801<\/p>\n

func newfromhash(hashedsecret []byte) (*hashed, error) {\n    if len(hashedsecret) < minhashsize {\n        return nil, errhashtooshort\n    }\n    p := new(hashed)\n    n, err := p.decodeversion(hashedsecret)\n    if err != nil {\n        return nil, err\n    }\n    hashedsecret = hashedsecret[n:]\n    n, err = p.decodecost(hashedsecret)\n    if err != nil {\n        return nil, err\n    }\n    hashedsecret = hashedsecret[n:]\n\n    \/\/ the \"+2\" is here because we'll have to append at most 2 '=' to the salt\n    \/\/ when base64 decoding it in expensiveblowfishsetup().\n    p.salt = make([]byte, encodedsaltsize, encodedsaltsize+2)\n    copy(p.salt, hashedsecret[:encodedsaltsize])\n\n    hashedsecret = hashedsecret[encodedsaltsize:]\n    p.hash = make([]byte, len(hashedsecret))\n    copy(p.hash, hashedsecret)\n\n    return p, nil\n}<\/pre>\n
\u636e\u6211\u4e86\u89e3\uff0c\u52a0\u76d0\u662f\u7528\u6765\u9632\u6b62\u5bf9\u624b\u4fb5\u5165\u6570\u636e\u5e93\u5e76\u83b7\u53d6\u6563\u5217\u5bc6\u7801\u5217\u8868\u7684\uff0c\u4e3a\u4e86\u4ece\u6563\u5217\u4e2d\u83b7\u53d6\u539f\u59cb\u5bc6\u7801\uff0c\u9ed1\u5ba2\u53ef\u4ee5\u904d\u5386\u6240\u6709\u6709\u6548\u7684\u5bc6\u7801\u7ec4\u5408\u5e76\u5bf9\u6bcf\u4e2a\u7ec4\u5408\u8fdb\u884c\u6563\u5217\uff0c\u5982\u679c\u751f\u6210\u7684\u54c8\u5e0c\u503c\u4e4b\u4e00\u4e0e\u9ed1\u5ba2\u6570\u636e\u5e93\u4e2d\u7684\u54c8\u5e0c\u503c\u5339\u914d\uff0c\u5219\u9ed1\u5ba2\u53ef\u4ee5\u53d6\u56de\u5bc6\u7801\u3002\u5728\u54c8\u5e0c\u4e4b\u524d\u6dfb\u52a0\u76d0\u4f1a\u8feb\u4f7f\u5bf9\u624b\u91cd\u65b0\u751f\u6210\u5f69\u8679\u8868\u3002<\/p>\n
\u5173\u952e\u662f\u5bf9\u5bc6\u7801\u548c\u76d0\u8fdb\u884c\u54c8\u5e0c\u5904\u7406<\/p>\n
hash(password + salt)<\/pre>\n
\u8feb\u4f7f\u9ed1\u5ba2\u4e13\u95e8\u4e3a\u76d0\u91cd\u65b0\u751f\u6210\u5f69\u8679\u8868<\/p>\n
\u4f46\u770b\u8d77\u6765 bcrypt<\/code> \u80fd\u591f\u53d6\u56de\u76d0\uff0c\u56e0\u6b64\u4ece\u6280\u672f\u4e0a\u8bb2\uff0c\u5982\u679c\u5bf9\u624b\u77e5\u9053\u7cfb\u7edf\u6b63\u5728\u4f7f\u7528 bcrypt\uff0c\u4ed6\u53ef\u4ee5\u5220\u9664\u76d0\u5e76\u83b7\u53d6\u672a\u52a0\u76d0\u7684\u54c8\u5e0c\u5bc6\u7801\u3002<\/p>\n
\u6362\u53e5\u8bdd\u8bf4\uff0c\u4e00\u65e6\u9ed1\u5ba2\u5f97\u5230 hashedsecret = hashedsecret[encodedsaltsize:]<\/code>\uff0c\u4ed6\u5c31\u53ef\u4ee5\u4f7f\u7528\u5f69\u8679\u653b\u51fb\u6765\u53d6\u56de\u5bc6\u7801\uff0c\u4ece\u800c\u4f7f\u76d0\u53d8\u5f97\u6beb\u65e0\u7528\u5904\u3002<\/p>\n
\u6211\u662f\u4e0d\u662f\u641e\u9519\u4e86\u4ec0\u4e48\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u4ed6\u53ef\u4ee5\u5220\u9664\u76d0\u5e76\u83b7\u53d6\u672a\u52a0\u76d0\u7684\u54c8\u5e0c\u5bc6\u7801\u3002<\/p>\n
\u9664\u4e86\u8fd9\u90e8\u5206\u4e4b\u5916\u7684\u6240\u6709\u5185\u5bb9\u90fd\u662f\u6b63\u786e\u7684\u3002<\/p>\n
\u60f3\u8c61\u4e00\u4e0b\uff0c\u60a8\u6709\u4e00\u4e2a\u5bc6\u7801pass<\/em>\u548c\u4e24\u4e2a\u76d0\uff1as1<\/em>\u3001s2<\/em>\u3002<\/p>\n
    \n
  • \n
    \u54c8\u5e0c\u503c(s1 + pass) = 123<\/p>\n<\/li>\n
  • \n
    \u54c8\u5e0c\u503c\uff08s2 + pass\uff09= 456<\/p>\n<\/li>\n<\/ul>\n
    \u56e0\u6b64\uff0c\u60a8\u7684\u6570\u636e\u5e93\u4e2d\u5c06\u6709\u4e24\u6761\u5b58\u50a8\u8bb0\u5f55\uff1a<\/p>\n
      \n
    • \n
      s1$123<\/p>\n<\/li>\n
    • \n
      s2$456<\/p>\n<\/li>\n<\/ul>\n
      \u5220\u9664\u76d0\u90e8\u5206\u4e0d\u4f1a\u8ba9\u5bf9\u624b\u6709\u4efb\u4f55\u8fdb\u5c55\uff0c\u56e0\u4e3a\u4ed6\u4ecd\u7136\u6709\u4e24\u4e2a\u4e0d\u540c\u7684\u54c8\u5e0c\u6458\u8981123<\/em>\u548c456<\/em>\u9700\u8981\u7834\u89e3\u3002<\/p>\n
      \u53e6\u4e00\u65b9\u9762\uff0c\u4e00\u65e6\u60a8\u4ece\u7528\u6237\u90a3\u91cc\u83b7\u5f97\u660e\u6587\uff0c\u5b83\u5c06\u4f7f\u60a8\u65e0\u6cd5\u91cd\u5efa\u54c8\u5e0c\u503c\u3002<\/p>\n
      \u60f3\u8c61\u4e00\u4e0b\u4ed6\u4eec\u7ed9\u4f60\u53d1\u9001\u901a\u884c\u8bc1<\/em>\u3002\u60a8\u60f3\u8981\u505a\u7684\u662f\u4ece\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u7684\u6563\u5217\u4e2d\u83b7\u53d6\u76d0\u5b50\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982s2<\/strong>$456\uff0c\u7136\u540e\u5c06\u5176\u4e0e\u660e\u6587\u8fde\u63a5\uff0c\u7136\u540e\u5c06 hash(s2 + pass) \u4e0e\u4e0a\u9762\u7684 456 \u8fdb\u884c\u6bd4\u8f83\u3002\u5982\u679c\u6ca1\u6709\u5c06\u76d0\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u60a8\u5c31\u65e0\u6cd5\u6267\u884c\u6b64\u64cd\u4f5c\uff0c\u8fd9\u5c31\u662f\u5b83\u7684\u5fc5\u8981\u6027\u3002<\/p>\n
      \u60a8\u53ef\u4ee5\u53d6\u56de\u76d0\uff0c\u4f46\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u60a8\u53ef\u4ee5\u83b7\u5f97\u672a\u52a0\u76d0\u7684\u5bc6\u7801\u54c8\u5e0c\u503c\u3002 \u201c\u6362\u53e5\u8bdd\u8bf4\uff0c\u4e00\u65e6\u9ed1\u5ba2\u83b7\u5f97 hashedSecret = hashedSecret[encodedSaltSize:]\uff0c\u4ed6\u5c31\u53ef\u4ee5\u4f7f\u7528\u5f69\u8679\u653b\u51fb\u6765\u53d6\u56de\u5bc6\u7801\uff0c\u4ece\u800c\u4f7f\u76d0\u53d8\u5f97\u6beb\u65e0\u7528\u5904\u3002\u201d\u5177\u6709\u8bef\u5bfc\u6027\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u83b7\u5f97\u76d0\u548c\u6563\u5217\u5bc6\u7801\uff0c\u4f46\u8fd9\u4e0d\u5141\u8bb8\u201c\u5f69\u8679\u653b\u51fb\u201d\u3002<\/p>\n
      \u201c\u5f69\u8679\u653b\u51fb\u201d\u4e2d\u7684\u653b\u51fb\u662f\uff1a\u4e00\u6b21<\/em>\u751f\u6210\u4e00\u4e2a\u5de8\u5927<\/strong>\u5f69\u8679\u8868\uff0c\u9884\u5148<\/em>\u3002\u8be5\u5217\u8868\u662f\u4e00\u5bf9 (cleartextpassword,passwordhash) \u6761\u76ee\u3002\u751f\u6210\u6b64\u8868\u975e\u5e38<\/em>\u8017\u65f6\uff08\u5982\u679c\u5305\u542b\u5927\u91cf\u5bc6\u7801\uff0c\u5219\u53ef\u80fd\u4f1a\u53d8\u5f97\u5f88\u5927\uff1b\u5982\u679c\u5305\u542b\u6240\u6709\u5bc6\u7801\uff0c\u5219\u53ef\u80fd\u4f1a\u53d8\u5f97\u5f88\u5927\uff01\uff09\u3002 \u201c\u5f69\u8679\u653b\u51fb\u201d\u4e2d\u7684\u653b\u51fb\u662f\uff1a\u60a8\u53ea\u9700\u751f\u6210\u6b64\u5f69\u8679\u8868\u4e00\u6b21<\/em>\uff0c\u5e76\u4e14\u53ef\u4ee5\u4f7f\u7528\u5b83\u975e\u5e38\u5feb\u901f\u5730\u67e5\u627e\u6570\u767e\u4e07\u4e2a\u5bc6\u7801\u54c8\u5e0c\u7684\u660e\u6587\u5bc6\u7801\u3002<\/p>\n
      \u7531\u4e8e\u4e0a\u9762 bcrypt \u4ee3\u7801\u4e2d\u7684\u6bcf\u4e2a\u5bc6\u7801\u90fd\u6709\u5176\u81ea\u5df1\u7684<\/em> \u76d0<\/em>\uff0c\u56e0\u6b64\u60a8\u4e0d\u80fd\u4f7f\u7528\u4e00\u4e2a<\/em>\u5f69\u8679\u8868\uff1a\u60a8\u5fc5\u987b\u521b\u5efa\u4e00\u4e2a\u5f69\u8679\u6bcf\u79cd\u76d0\u7684\u8868\u3002\u8ba9\u201c\u5f69\u8679\u653b\u51fb\u201d\u6beb\u65e0\u7528\u5904\u3002<\/p>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48 golang \u5305 bcrypt \u80fd\u591f\u5728\u6563\u5217\u5bc6\u7801\u540e\u68c0\u7d22\u76d0\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-206986","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206986","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=206986"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206986\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206986"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206986"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206986"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}