{"id":11911,"date":"2019-10-22T14:01:46","date_gmt":"2019-10-22T05:01:46","guid":{"rendered":"https:\/\/www.eformsign.com\/kr\/support\/?post_type=manual_documentation&#038;p=11911"},"modified":"2020-12-14T09:20:41","modified_gmt":"2020-12-14T00:20:41","slug":"convert-private-key","status":"publish","type":"manual_documentation","link":"https:\/\/www.eformsign.com\/jp\/support\/documentation\/signature-generation-verification\/generate-signature\/convert-private-key\/","title":{"rendered":"2.2.1.1 Private Key \u306e\u5909\u63db"},"content":{"rendered":"\n<p>&#8211; \u767a\u884c\u3057\u305f\u79d8\u5bc6\u9375\uff08hex string\uff09\u3092\u79d8\u5bc6\u9375\uff08PKCS#8\uff09\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4>\u4f8b\u984c<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.security.KeyFactory;\nimport java.security.spec.PKCS8EncodedKeySpec;\nimport java.security.PrivateKey;\n \n \nString privateKeyHexStr = \"\u767a\u884c\u3057\u305fprivate key(String)\";\nKeyFactory keyFact = KeyFactory.getInstance(\"EC\");\nPKCS8EncodedKeySpec psks8KeySpec = new PKCS8EncodedKeySpec(new BigInteger(privateKeyHexStr,16).toByteArray());\nPrivateKey privateKey = keyFact.generatePrivate(psks8KeySpec);<\/code><\/pre>\n","protected":false},"author":5,"featured_media":0,"parent":11909,"menu_order":0,"template":"","manualdocumentationcategory":[16],"_links":{"self":[{"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manual_documentation\/11911"}],"collection":[{"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manual_documentation"}],"about":[{"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/types\/manual_documentation"}],"author":[{"embeddable":true,"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/users\/5"}],"version-history":[{"count":1,"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manual_documentation\/11911\/revisions"}],"predecessor-version":[{"id":18292,"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manual_documentation\/11911\/revisions\/18292"}],"up":[{"embeddable":true,"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manual_documentation\/11909"}],"wp:attachment":[{"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/media?parent=11911"}],"wp:term":[{"taxonomy":"manualdocumentationcategory","embeddable":true,"href":"https:\/\/www.eformsign.com\/jp\/support\/wp-json\/wp\/v2\/manualdocumentationcategory?post=11911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}