{"id":203881,"date":"2025-05-22T12:07:19","date_gmt":"2025-05-22T04:07:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203881\/"},"modified":"2025-05-22T12:07:19","modified_gmt":"2025-05-22T04:07:19","slug":"%e5%a6%82%e4%bd%95%e5%b0%86-ssh-keygen-%e7%94%9f%e6%88%90%e7%9a%84%e5%85%ac%e9%92%a5%e5%92%8c%e7%a7%81%e9%92%a5%e8%bd%ac%e6%8d%a2%e4%b8%ba-java-%e4%b8%ad%e7%9a%84-rsapublickey-%e5%92%8c-rsaprivatekey","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203881\/","title":{"rendered":"\u5982\u4f55\u5c06 SSH-Keygen \u751f\u6210\u7684\u516c\u94a5\u548c\u79c1\u94a5\u8f6c\u6362\u4e3a Java \u4e2d\u7684 RSAPublicKey \u548c RSAPrivateKey\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5c06 SSH-Keygen \u751f\u6210\u7684\u516c\u94a5\u548c\u79c1\u94a5\u8f6c\u6362\u4e3a Java \u4e2d\u7684 RSAPublicKey \u548c RSAPrivateKey\uff1f <\/h1>\n<p>\u54c8\u55bd\uff01\u5927\u5bb6\u597d\uff0c\u5f88\u9ad8\u5174\u53c8\u89c1\u9762\u4e86\uff0c\u6211\u662f\u7684\u4e00\u540d\u4f5c\u8005\uff0c\u4eca\u5929\u7531\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u5c06 SSH-Keygen \u751f\u6210\u7684\u516c\u94a5\u548c\u79c1\u94a5\u8f6c\u6362\u4e3a Java \u4e2d\u7684 RSAPublicKey \u548c RSAPrivateKey\uff1f \u300b<\/span>\uff0c\u672c\u6587\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60\u8fdb\u6b65\uff0c\u4e5f\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u3001\u70b9\u8d5e\u3001\u6536\u85cf\u3001\u8f6c\u53d1! \u4e0b\u9762\u5c31\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241130\/1732940870674a94467445b.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u5c06 ssh-keygen \u751f\u6210\u7684\u516c\u94a5\u548c\u79c1\u94a5\u8f6c\u6362\u4e3a java \u4e2d\u7684 rsapublickey \u548c rsaprivatekey<\/strong><\/p>\n<p>\u60a8\u63d0\u5230\u7684\u51fd\u6570\u65e0\u6cd5\u6b63\u786e\u8f6c\u6362 ssh-keygen \u751f\u6210\u7684\u516c\u94a5\uff0c\u56e0\u4e3a ssh-keygen \u751f\u6210\u7684\u516c\u94a5\u91c7\u7528\u4e13\u6709\u683c\u5f0f\uff0c\u800c\u8be5\u51fd\u6570\u9002\u7528\u4e8e\u6807\u51c6 x.509 der \u7f16\u7801\u7684\u516c\u94a5\u3002<\/p>\n<p><strong>\u8f6c\u6362\u6b65\u9aa4\uff1a<\/strong><\/p>\n<p>\u8981\u5728 java \u4e2d\u8f6c\u6362 ssh-keygen \u751f\u6210\u7684\u516c\u94a5\u548c\u79c1\u94a5\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u89e3\u7801\u516c\u94a5\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 base64 \u89e3\u7801\u516c\u94a5\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u5ffd\u7565\u524d 11 \u4e2a\u5b57\u8282\uff08\u56fa\u5b9a\u7b7e\u540d\u201c0007ssh-rsa\u201d\uff09\u3002<\/li>\n<li>\u8bfb\u51fa\u7b2c 11 \u5230\u7b2c 14 \u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a\u6307\u6570\u957f\u5ea6\uff08\u5c0f\u7aef\u8868\u793a\uff09\u3002<\/li>\n<li>\u8bfb\u51fa\u6307\u6570\u957f\u5ea6\u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a\u6307\u6570\uff08\u5927\u7aef\u8868\u793a\uff09\u3002<\/li>\n<li>\u8bfb\u51fa\u7b2c 15 \u5230\u7b2c 18 \u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a\u6a21\u6570\u957f\u5ea6\uff08\u5c0f\u7aef\u8868\u793a\uff09\u3002<\/li>\n<li>\u8bfb\u51fa\u6a21\u6570\u957f\u5ea6\u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a\u6a21\u6570\uff08\u5927\u7aef\u8868\u793a\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u89e3\u7801\u79c1\u94a5\uff1a<\/strong><\/p>\n<ul>\n<li>\u6839\u636e\u516c\u94a5\u8f6c\u6362\u5f97\u5230\u7684\u6307\u6570\u548c\u6a21\u6570\uff0c\u751f\u6210 rsapublickeyspec\u3002<\/li>\n<li>\u4f7f\u7528 base64 \u89e3\u7801\u79c1\u94a5\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u540c\u6837\u5ffd\u7565\u524d 11 \u4e2a\u5b57\u8282\u3002<\/li>\n<li>\u8bfb\u51fa\u7b2c 11 \u5230\u7b2c 14 \u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a\u79c1\u94a5\u957f\u5ea6\uff08\u5927\u7aef\u8868\u793a\uff09\u3002<\/li>\n<li>\u8bfb\u51fa\u79c1\u94a5\u957f\u5ea6\u4e2a\u5b57\u8282\uff0c\u5c06\u5176\u89e3\u91ca\u4e3a der \u7f16\u7801\u7684\u79c1\u94a5\uff08\u5305\u62ec n\u3001e\u3001d\u3001p\u3001q\u3001dp \u548c iq)\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u751f\u6210 java \u5bf9\u8c61\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 rsapublickeyspec \u5b9e\u4f8b\u5316 rsapublickey\u3002<\/li>\n<li>\u4f7f\u7528 asn.1 der \u89e3\u7801\u5668\u89e3\u6790\u79c1\u94a5 der \u7f16\u7801\u6570\u636e\u3002<\/li>\n<li>\u4ece\u89e3\u7801\u7684\u6570\u636e\u4e2d\u63d0\u53d6 rsaprivatecrtkeyfields\uff08n\u3001e\u3001d\u3001p\u3001q\u3001dp \u548c iq\uff09\u5e76\u5b9e\u4f8b\u5316 rsaprivatekey\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>\/\/ \u516c\u94a5\u8f6c\u6362\nbyte[] decodedPublicKey = Base64.getDecoder().decode(publicKeyString);\n\/\/ \u5ffd\u7565\u524d 11 \u5b57\u8282\nint exponentLength = decodedPublicKey[11] &amp; 0xFF | (decodedPublicKey[12] &amp; 0xFF) &lt;&lt; 8 | (decodedPublicKey[13] &amp; 0xFF) &lt;&lt; 16 | (decodedPublicKey[14] &amp; 0xFF) &lt;&lt; 24;\nbyte[] exponent = new byte[exponentLength];\nSystem.arraycopy(decodedPublicKey, 15, exponent, 0, exponentLength);\nint modulusLength = decodedPublicKey[15 + exponentLength] &amp; 0xFF | (decodedPublicKey[16 + exponentLength] &amp; 0xFF) &lt;&lt; 8 | (decodedPublicKey[17 + exponentLength] &amp; 0xFF) &lt;&lt; 16 | (decodedPublicKey[18 + exponentLength] &amp; 0xFF) &lt;&lt; 24;\nbyte[] modulus = new byte[modulusLength];\nSystem.arraycopy(decodedPublicKey, 19 + exponentLength, modulus, 0, modulusLength);\nRSAPublicKey publicKey = KeyFactory.getInstance(\"RSA\").generatePublic(new RSAPublicKeySpec(new BigInteger(1, modulus), new BigInteger(1, exponent)));\n\n\/\/ \u79c1\u94a5\u8f6c\u6362\nbyte[] decodedPrivateKey = Base64.getDecoder().decode(privateKeyString);\n\/\/ \u5ffd\u7565\u524d 11 \u5b57\u8282\nint privateKeyLength = decodedPrivateKey[11] &amp; 0xFF | (decodedPrivateKey[12] &amp; 0xFF) &lt;&lt; 8 | (decodedPrivateKey[13] &amp; 0xFF) &lt;&lt; 16 | (decodedPrivateKey[14] &amp; 0xFF) &lt;&lt; 24;\nbyte[] derPrivateKey = new byte[privateKeyLength];\nSystem.arraycopy(decodedPrivateKey, 15, derPrivateKey, 0, privateKeyLength);\nASN1InputStream input = new ASN1InputStream(new ByteArrayInputStream(derPrivateKey));\nASN1Sequence privateKeySequence = (ASN1Sequence) input.readObject();\nBigInteger n = ((ASN1Integer) privateKeySequence.getObjectAt(0)).getValue();\nBigInteger e = ((ASN1Integer) privateKeySequence.getObjectAt(1)).getValue();\nBigInteger d = ((ASN1Integer) privateKeySequence.getObjectAt(2)).getValue();\nBigInteger p = ((ASN1Integer) privateKeySequence.getObjectAt(3)).getValue();\nBigInteger q = ((ASN1Integer) privateKeySequence.getObjectAt(4)).getValue();\nBigInteger dp = ((ASN1Integer) privateKeySequence.getObjectAt(5)).getValue();\nBigInteger iq = ((ASN1Integer) privateKeySequence.getObjectAt(6)).getValue();\nRSAPrivateKey privateKey = new RSAPrivateCrtKey(n, e, d, p, q, dp, iq);<\/pre>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5c06 SSH-Keygen \u751f&#46;&#46;&#46;<\/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-203881","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203881","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=203881"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203881\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203881"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203881"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203881"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}