{"id":3048,"date":"2023-08-28T10:09:55","date_gmt":"2023-08-28T02:09:55","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=3048"},"modified":"2023-08-28T10:09:55","modified_gmt":"2023-08-28T02:09:55","slug":"rsa%e5%8a%a0%e5%af%86%e8%a7%a3%e5%af%86","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/uncategorized\/rsa%e5%8a%a0%e5%af%86%e8%a7%a3%e5%af%86\/","title":{"rendered":"RSA\u52a0\u5bc6\u89e3\u5bc6"},"content":{"rendered":"\n\n
\n <\/path> \n <\/svg> <\/p>\n

<\/a>RSA\u52a0\u5bc6\u89e3\u5bc6<\/h1>\n

\u975e\u5bf9\u79f0\u52a0\u5bc6\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u6570\u636e\u52a0\u5bc6\u7b97\u6cd5\uff0c\u5b83\u4f7f\u7528\u4e0d\u540c\u7684\u5bc6\u94a5\u8fdb\u884c\u52a0\u5bc6\u548c\u89e3\u5bc6\u3002RSA\u52a0\u5bc6\u7b97\u6cd5\u5c31\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u975e\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u3002\u5728RSA\u52a0\u5bc6\u7b97\u6cd5\u4e2d\uff0c\u5bc6\u94a5\u5206\u4e3a\u516c\u94a5\uff08\u53ef\u516c\u5f00\uff09\u548c\u79c1\u94a5\uff08\u4e0d\u516c\u5f00\uff09\u3002\u516c\u94a5\u548c\u79c1\u94a5\u662f\u6210\u5bf9\u51fa\u73b0\u7684\u3002 \u7528\u516c\u94a5\u52a0\u5bc6\u7684\u6570\u636e\uff0c\u53ea\u6709\u5bf9\u5e94\u7684\u79c1\u94a5\u53ef\u4ee5\u89e3\u5bc6\u3002 \u7528\u79c1\u94a5\u52a0\u5bc6\u7684\u6570\u636e\uff0c\u53ea\u6709\u5bf9\u5e94\u7684\u516c\u94a5\u53ef\u4ee5\u89e3\u5bc6\u3002
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cRSA\u5bf9\u52a0\u5bc6\u89e3\u5bc6\u957f\u5ea6\u662f\u6709\u9650\u5236\u7684\uff0c\u52a0\u5bc6\u957f\u5ea6\u4e0d\u8d85\u8fc7117Byte\uff0c\u6240\u4ee5\u9700\u8981\u901a\u8fc7\u5206\u6bb5\u6765\u8fdb\u884c\u52a0\u5bc6\u89e3\u5bc6\u3002<\/p>\n

<\/a>\u751f\u6210\u5bc6\u94a5\u5bf9\uff1a<\/h4>\n

\u4e00\u822c\u6765\u8bf4\uff0cRSA\u5bc6\u94a5\u7684\u4f4d\u6570\u8d8a\u5927\uff0c\u5bc6\u94a5\u8d8a\u5b89\u5168\uff0c\u4f46\u52a0\u5bc6\u548c\u89e3\u5bc6\u7684\u901f\u5ea6\u4e5f\u4f1a\u53d8\u6162\u3002\u5e38\u89c1\u7684 RSA \u5bc6\u94a5\u4f4d\u6570\u9664\u4e86 1024 \u548c 2048\uff0c\u8fd8\u6709 3072\u30014096 \u7b49\uff0c\u4e5f\u6709\u5c11\u6570\u4eba\u4f7f\u7528\u66f4\u9ad8\u7684\u5bc6\u94a5\u4f4d\u6570\u3002\u4e0d\u8fc7\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u4f7f\u7528 2048 \u4f4d RSA \u5bc6\u94a5\u5c31\u8db3\u591f\u5b89\u5168\u4e86\u3002
\u751f\u6210\u7684\u5bc6\u94a5\u5bf9\u8bb0\u5f97\u4fdd\u5b58\u54e6\uff01\uff01\uff01<\/strong><\/em><\/p>\n

\t\/***\n     * \u751f\u6210\u5bc6\u94a5\u5bf9\n     * @param keySize \u5bc6\u94a5\u4f4d\u6570\n     * @ver v1.0.0\n     *\/<\/span>\n    public<\/span> static<\/span> void<\/span> generateKeyPair<\/span>(<\/span>int<\/span> keySize)<\/span>{<\/span>\n        try<\/span> {<\/span>\n            KeyPairGenerator<\/span> keyPairGenerator =<\/span> KeyPairGenerator<\/span>.<\/span>getInstance<\/span>(<\/span>\"RSA\"<\/span>)<\/span>;<\/span>\n            keyPairGenerator.<\/span>initialize<\/span>(<\/span>keySize)<\/span>;<\/span>\n            KeyPair<\/span> keyPair =<\/span> keyPairGenerator.<\/span>generateKeyPair<\/span>(<\/span>)<\/span>;<\/span>\n            PublicKey<\/span> publicKey =<\/span> keyPair.<\/span>getPublic<\/span>(<\/span>)<\/span>;<\/span>\n            System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"=========PublicKey Begin==========\"<\/span>)<\/span>;<\/span>\n            System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>Base64<\/span>.<\/span>encodeBase64String<\/span>(<\/span>publicKey.<\/span>getEncoded<\/span>(<\/span>)<\/span>)<\/span>)<\/span>;<\/span>\n            System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>)<\/span>;<\/span>\n            PrivateKey<\/span> privateKey =<\/span> keyPair.<\/span>getPrivate<\/span>(<\/span>)<\/span>;<\/span>\n            System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"=========PrivateKey Begin==========\"<\/span>)<\/span>;<\/span>\n            System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>Base64<\/span>.<\/span>encodeBase64String<\/span>(<\/span>privateKey.<\/span>getEncoded<\/span>(<\/span>)<\/span>)<\/span>)<\/span>;<\/span>\n        }<\/span> catch<\/span> (<\/span>NoSuchAlgorithmException<\/span> e)<\/span> {<\/span>\n            log.<\/span>error<\/span>(<\/span>\"RSA generator key Pair Error:{}\"<\/span>,<\/span> e.<\/span>getMessage<\/span>(<\/span>)<\/span>)<\/span>;<\/span>\n        }<\/span>\n    }<\/span>\n    \n<\/code><\/pre>\n
\u9ed8\u8ba4\u5bc6\u94a5\u4f4d\u6570\u4e3a2048\uff08keySize = 2048\uff09<\/strong><\/p>\n
\tprivate<\/span> static<\/span> final<\/span> String<\/span> ALGORITHM =<\/span> \"RSA\"<\/span>;<\/span>\n\n    private<\/span> static<\/span> final<\/span> int<\/span> KEY_SIZE =<\/span> 2048<\/span>;<\/span>\n\n    private<\/span> static<\/span> final<\/span> Integer<\/span> MAX_ENCRYPT_LENGTH =<\/span> 117<\/span>;<\/span>\n\n    private<\/span> static<\/span> final<\/span> String<\/span> PUBLIC_KEY =<\/span> \"\"<\/span>;<\/span>\n\n    private<\/span> static<\/span> final<\/span> String<\/span> PRIVATE_KEY =<\/span> \"\"<\/span>;<\/span>\n<\/code><\/pre>\n
<\/a>\u5206\u6bb5\u52a0\u5bc6\uff1a<\/h4>\n
\t\/**\n     * \u516c\u94a5 \u5206\u6bb5\u52a0\u5bc6--\u9ed8\u8ba4\u5bc6\u94a5\u4f4d\u6570\u4e3a2048\n     * @param plaintext \u660e\u6587\n     * @return {@link String}\n     * @ver v1.0.0\n     *\/<\/span>\n    public<\/span> static<\/span> String<\/span> encryptSection<\/span>(<\/span>String<\/span> plaintext)<\/span> {<\/span>\n        if<\/span>(<\/span>StringUtils<\/span>.<\/span>isEmpty<\/span>(<\/span>plaintext)<\/span>)<\/span>{<\/span>\n            log.<\/span>warn<\/span>(<\/span>\"\u52a0\u5bc6-->\u539f\u6570\u636e\u4e3a\u7a7a\uff01\uff01\uff01\"<\/span>)<\/span>;<\/span>\n            return<\/span> null<\/span>;<\/span>\n        }<\/span>\n        try<\/span> {<\/span>\n            \/\/base64\u7f16\u7801\u7684\u516c\u94a5<\/span>\n            byte<\/span>[<\/span>]<\/span> decoded =<\/span> Base64<\/span>.<\/span>decodeBase64<\/span>(<\/span>PUBLIC_KEY)<\/span>;<\/span>\n            RSAPublicKey<\/span> pubKey =<\/span> (<\/span>RSAPublicKey<\/span>)<\/span> KeyFactory<\/span>.<\/span>getInstance<\/span>(<\/span>ALGORITHM)<\/span>.<\/span>generatePublic<\/span>(<\/span>new<\/span> X509EncodedKeySpec<\/span>(<\/span>decoded)<\/span>)<\/span>;<\/span>\n            \/\/RSA\u52a0\u5bc6<\/span>\n            Cipher<\/span> cipher =<\/span> Cipher<\/span>.<\/span>getInstance<\/span>(<\/span>ALGORITHM)<\/span>;<\/span>\n            cipher.<\/span>init<\/span>(<\/span>Cipher<\/span>.<\/span>ENCRYPT_MODE,<\/span> pubKey)<\/span>;<\/span>\n            byte<\/span>[<\/span>]<\/span> bytes =<\/span> plaintext.<\/span>getBytes<\/span>(<\/span>)<\/span>;<\/span>\n            int<\/span> inputLen =<\/span> bytes.<\/span>length;<\/span>\n            \/\/\u504f\u79fb\u91cf<\/span>\n            int<\/span> offLen =<\/span> 0<\/span>;<\/span>\n            int<\/span> i =<\/span> 0<\/span>;<\/span>\n            ByteArrayOutputStream<\/span> bops =<\/span> new<\/span> ByteArrayOutputStream<\/span>(<\/span>)<\/span>;<\/span>\n            while<\/span>(<\/span>inputLen -<\/span> offLen ><\/span> 0<\/span>)<\/span>{<\/span>\n                int<\/span> length =<\/span> Math<\/span>.<\/span>min<\/span>(<\/span>inputLen -<\/span> offLen,<\/span> MAX_ENCRYPT_LENGTH)<\/span>;<\/span>\n                byte<\/span> [<\/span>]<\/span> cache =<\/span> cipher.<\/span>doFinal<\/span>(<\/span>bytes,<\/span> offLen,<\/span> length)<\/span>;<\/span>\n                bops.<\/span>write<\/span>(<\/span>cache)<\/span>;<\/span>\n                i++<\/span>;<\/span>\n                offLen =<\/span> MAX_ENCRYPT_LENGTH *<\/span> i;<\/span>\n            }<\/span>\n            bops.<\/span>close<\/span>(<\/span>)<\/span>;<\/span>\n            return<\/span> Base64<\/span>.<\/span>encodeBase64String<\/span>(<\/span>bops.<\/span>toByteArray<\/span>(<\/span>)<\/span>)<\/span>;<\/span>\n        }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>\n            log.<\/span>error<\/span>(<\/span>\"\u52a0\u5bc6\u5931\u8d25\uff1a{}\"<\/span>,<\/span>e.<\/span>getMessage<\/span>(<\/span>)<\/span>)<\/span>;<\/span>\n            return<\/span> null<\/span>;<\/span>\n        }<\/span>\n    }<\/span>\n    \n<\/code><\/pre>\n
<\/a>\u5206\u6bb5\u89e3\u5bc6\uff1a<\/h4>\n
\t\/**\n     * \u79c1\u94a5 \u5206\u6bb5\u89e3\u5bc6--\u9ed8\u8ba4\u5bc6\u94a5\u4f4d\u6570\u4e3a2048\n     * @param ciphertext \u5bc6\u6587\n     * @return {@link String}\n     * @ver v1.0.0\n     *\/<\/span>\n    public<\/span> static<\/span> String<\/span> decryptSection<\/span>(<\/span>String<\/span> ciphertext)<\/span> {<\/span>\n        if<\/span>(<\/span>StringUtils<\/span>.<\/span>isEmpty<\/span>(<\/span>ciphertext)<\/span>)<\/span>{<\/span>\n            log.<\/span>warn<\/span>(<\/span>\"\u89e3\u5bc6-->\u539f\u6570\u636e\u4e3a\u7a7a\uff01\uff01\uff01\"<\/span>)<\/span>;<\/span>\n            return<\/span> null<\/span>;<\/span>\n        }<\/span>\n        try<\/span> {<\/span>\n            \/\/base64\u7f16\u7801\u7684\u79c1\u94a5<\/span>\n            byte<\/span>[<\/span>]<\/span> decoded =<\/span> Base64<\/span>.<\/span>decodeBase64<\/span>(<\/span>PRIVATE_KEY)<\/span>;<\/span>\n            RSAPrivateKey<\/span> priKey =<\/span> (<\/span>RSAPrivateKey<\/span>)<\/span> KeyFactory<\/span>.<\/span>getInstance<\/span>(<\/span>ALGORITHM)<\/span>.<\/span>generatePrivate<\/span>(<\/span>new<\/span> PKCS8EncodedKeySpec<\/span>(<\/span>decoded)<\/span>)<\/span>;<\/span>\n            \/\/RSA\u89e3\u5bc6<\/span>\n            Cipher<\/span> cipher =<\/span> Cipher<\/span>.<\/span>getInstance<\/span>(<\/span>ALGORITHM)<\/span>;<\/span>\n            cipher.<\/span>init<\/span>(<\/span>Cipher<\/span>.<\/span>DECRYPT_MODE,<\/span> priKey)<\/span>;<\/span>\n            \/\/64\u4f4d\u89e3\u7801\u52a0\u5bc6\u540e\u7684\u5b57\u7b26\u4e32<\/span>\n            byte<\/span>[<\/span>]<\/span> bytes =<\/span> Base64<\/span>.<\/span>decodeBase64<\/span>(<\/span>ciphertext.<\/span>getBytes<\/span>(<\/span>StandardCharsets<\/span>.<\/span>UTF_8)<\/span>)<\/span>;<\/span>\n            int<\/span> inputLen =<\/span> bytes.<\/span>length;<\/span>\n            int<\/span> offLen =<\/span> 0<\/span>;<\/span>\n            int<\/span> i =<\/span> 0<\/span>;<\/span>\n            \/\/ \u89e3\u5bc6\u957f\u5ea6<\/span>\n            int<\/span> maxDecryptLen =<\/span> KEY_SIZE \/<\/span> 8<\/span>;<\/span>\n            ByteArrayOutputStream<\/span> byteArrayOutputStream =<\/span> new<\/span> ByteArrayOutputStream<\/span>(<\/span>)<\/span>;<\/span>\n            while<\/span>(<\/span>inputLen -<\/span> offLen ><\/span> 0<\/span>)<\/span>{<\/span>\n                byte<\/span>[<\/span>]<\/span> cache;<\/span>\n                int<\/span> length =<\/span> Math<\/span>.<\/span>min<\/span>(<\/span>inputLen -<\/span> offLen,<\/span> maxDecryptLen)<\/span>;<\/span>\n                cache =<\/span> cipher.<\/span>doFinal<\/span>(<\/span>bytes,<\/span>offLen,<\/span>length)<\/span>;<\/span>\n                byteArrayOutputStream.<\/span>write<\/span>(<\/span>cache)<\/span>;<\/span>\n                i++<\/span>;<\/span>\n                offLen =<\/span> maxDecryptLen *<\/span> i;<\/span>\n\n            }<\/span>\n            byteArrayOutputStream.<\/span>close<\/span>(<\/span>)<\/span>;<\/span>\n            return<\/span> byteArrayOutputStream.<\/span>toString<\/span>(<\/span>)<\/span>;<\/span>\n        }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>\n            log.<\/span>error<\/span>(<\/span>\"\u89e3\u5bc6\u5931\u8d25\uff1a{}\"<\/span>,<\/span>e.<\/span>getMessage<\/span>(<\/span>)<\/span>)<\/span>;<\/span>\n            return<\/span> null<\/span>;<\/span>\n        }<\/span>\n    }<\/span>\n    \n<\/code><\/pre>\n
<\/a>\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/h4>\n
\u5148\u6d4b\u8bd5\u4e00\u4e0b\u5c0f\u4e8e117\u7684==>
 \u52a0\u5bc6\uff1a
 \"\u52a0\u5bc6\"
\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8eCSDN\uff1ahttps:\/\/blog.csdn.net\/weixin_43645266\/article\/details\/131182615<\/p>\n","raw":"","protected":false},"excerpt":{"rendered":"
RSA\u52a0\u5bc6\u89e3\u5bc6 \u975e\u5bf9\u79f0\u52a0\u5bc6\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u6570\u636e\u52a0\u5bc6\u7b97\u6cd5\uff0c\u5b83\u4f7f\u7528\u4e0d\u540c\u7684\u5bc6\u94a5\u8fdb\u884c\u52a0\u5bc6\u548c\u89e3\u5bc6\u3002RSA\u52a0\u5bc6\u7b97\u6cd5\u5c31\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u975e\u5bf9\u79f0\u52a0\u5bc6 …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3048","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-38\/202307311732387b7b23732.jpeg","id":"image1"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-39\/202307311732398e8e37082.jpeg","id":"image2"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-39\/202307311732398e8e37082.jpeg","id":"image3"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-40\/2023073117324031313593a.jpeg","id":"image4"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-40\/2023073117324031313593a.jpeg","id":"image5"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-41\/202307311732418e8ea3503.jpeg","id":"image6"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-31\/17-32-41\/202307311732418e8ea3503.jpeg","id":"image7"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u672a\u5206\u7c7b","post_date":"2023-08-28","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":405,"next_post_id":2915,"next_post_title":"JVM\u5165\u95e8","previous_post_id":2981,"previous_post_title":"\u5206\u4eab\u514d\u8d39api\u63a5\u53e3","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/3048","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=3048"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/3048\/revisions"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=3048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=3048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=3048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}