{"id":11915,"date":"2019-10-22T14:04:34","date_gmt":"2019-10-22T05:04:34","guid":{"rendered":"https:\/\/www.eformsign.com\/kr\/support\/?post_type=manual_documentation&#038;p=11915"},"modified":"2019-10-22T14:04:34","modified_gmt":"2019-10-22T05:04:34","slug":"execution-time-signature","status":"publish","type":"manual_documentation","link":"https:\/\/www.eformsign.com\/kr\/support\/documentation\/signature-generation-verification\/generate-signature\/execution-time-signature\/","title":{"rendered":"2.2.1.3 execution_time \uc11c\uba85"},"content":{"rendered":"\r\n<p>&#8211; <a href=\"https:\/\/www.eformsign.com\/kr\/support\/documentation\/signature-generation-verification\/generate-signature\/execution-time\/\">2.2.1.2<\/a> \uc5d0\uc11c \uc5bb\uc740 \uc11c\ubc84 \ud604\uc7ac \uc2dc\uac04\uc744 String(UTF-8)\uc73c\ub85c \ubcc0\ud658\ud558\uc5ec, 2.2.1.1\uc5d0\uc11c \uc5bb\uc740 private key\ub85c \uc11c\uba85\ud558\uace0 \uc11c\uba85\ud55c \ub370\uc774\ud130\ub97c hex string\uc73c\ub85c \ubcc0\ud658 \ud569\ub2c8\ub2e4. (\uc11c\uba85 \uc54c\uace0\ub9ac\uc998\uc740 SHA256withECDSA\uc744 \uc0ac\uc6a9 \ud569\ub2c8\ub2e4.)<\/p>\r\n\r\n\r\n\r\n<h4>Example<\/h4>\r\n\r\n\r\n\r\n<pre class=\"wp-block-code\"><code>import java.security.KeyFactory;\r\nimport java.security.spec.PKCS8EncodedKeySpec;\r\nimport java.security.PrivateKey;\r\nimport java.security.Signature;\r\n \r\n\/\/2.2.1.1 private key\r\nString privateKeyHexStr = \"\ubc1c\uae09 \ubc1b\uc740 private key(String)\";\r\nKeyFactory keyFact = KeyFactory.getInstance(\"EC\");\r\nPKCS8EncodedKeySpec psks8KeySpec = new PKCS8EncodedKeySpec(new BigInteger(privateKeyHexStr,16).toByteArray());\r\nPrivateKey privateKey = keyFact.generatePrivate(psks8KeySpec);\r\n \r\n\/\/2.2.1.2 execution_time\r\nlong execution_time = new Date().getTime();\r\n \r\nString execution_time_str = String.valueOf(execution_time);\r\nSignature ecdsa = Signature.getInstance(\"SHA256withECDSA\");\r\necdsa.initSign(privateKey);\r\necdsa.update(execution_time_str.getBytes(\"UTF-8\"));\r\nString eformsign_signature = new BigInteger(ecdsa.sign()).toString(16);<\/code><\/pre>\r\n","protected":false},"author":1,"featured_media":0,"parent":11909,"menu_order":0,"template":"","manualdocumentationcategory":[44],"_links":{"self":[{"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manual_documentation\/11915"}],"collection":[{"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manual_documentation"}],"about":[{"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/types\/manual_documentation"}],"author":[{"embeddable":true,"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":1,"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manual_documentation\/11915\/revisions"}],"predecessor-version":[{"id":11916,"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manual_documentation\/11915\/revisions\/11916"}],"up":[{"embeddable":true,"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manual_documentation\/11909"}],"wp:attachment":[{"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/media?parent=11915"}],"wp:term":[{"taxonomy":"manualdocumentationcategory","embeddable":true,"href":"https:\/\/www.eformsign.com\/kr\/support\/wp-json\/wp\/v2\/manualdocumentationcategory?post=11915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}