{"id":9250,"date":"2013-10-16T20:32:01","date_gmt":"2013-10-17T01:32:01","guid":{"rendered":"http:\/\/jianmingli.com\/wp\/?p=9250"},"modified":"2018-09-17T18:27:47","modified_gmt":"2018-09-17T23:27:47","slug":"putty-public-key-authentication","status":"publish","type":"post","link":"https:\/\/jianmingli.com\/wp\/?p=9250","title":{"rendered":"Putty Public Key Authentication"},"content":{"rendered":"
\n

Contents<\/h2>\n
    \n\t
  1. \n\t\tOn Client Machine<\/a>\n\t\t
      \n\t\t\t
    1. \n\t\t\t\tGenerate Private\/Public Key Pair with PUTTYGEN.EXE<\/em><\/a>\n\t\t\t<\/li>\n\t\t\t
    2. \n\t\t\t\tSave Private Key<\/a>\n\t\t\t<\/li>\n\t\t<\/ol>\n\t
    3. \n\t\tOn SSH Server Machine<\/a>\n\t\t
        \n\t\t\t
      1. \n\t\t\t\tSetup authorized_keys2<\/em> File<\/a>\n\t\t\t<\/li>\n\t\t<\/ol>\n\t
      2. \n\t\tConfigure Private Key for PuTTY Session<\/a>\n\t\t
          \n\t\t\t
        1. \n\t\t\t\tAdd Private key to PuTTY SSH Authentication Agent<\/a>\n\t\t\t<\/li>\n\t\t\t
        2. \n\t\t\t\tStart PuTTY Session<\/a>\n\t\t\t<\/li>\n<\/ol>\n<\/ol>\n<\/ol>\n<\/div>\n
           <\/div>\n

          On Client Machine<\/h2><\/span>\n

          Generate Private\/Public Key Pair with PUTTYGEN.EXE<\/em><\/h3><\/span>\n

          * Change directory to PuTTY installation directory, e.g. C:\\prog\\PuTTY<\/em>
          \n* Double click PUTTYGEN.EXE<\/em>
          \n* Select:
          \n– Type of key to generate: SSH-2 RSA<\/em>
          \n– Number of bits in a generated key: 2048<\/strong>
          \n* Click Generate<\/em>
          \n* Move the mouse around in the Key area
          \n* Private\/public key pair is generated:<\/p>\n

          \"\"<\/a><\/h6><\/span>\n

          Save Private Key<\/h3><\/span>\n

          * Enter:
          \n– Key passphrase:
          \n– Confirm passphrase:
          \n* Click Save private key<\/em> and save private key to a local directory, e.g. C:\\Users\\jimmy\\MyPuTTYPrivateKey.ppk<\/em><\/p>\n

          \"\"<\/a><\/h6><\/span>\n

          * You don’t need to save public key for this exercise<\/p>\n

          On SSH Server Machine<\/h2><\/span>\n

          Setup authorized_keys2<\/em> File<\/h3><\/span>\n

          * SSH into server machine with password authentication for now
          \n* Change directory to user’s home directory
          \n* Make a new directory named .ssh<\/strong> if it does not exist already:
          \n* Change directory to .ssh<\/em> directory:
          \n* Check \/etc\/ssh\/sshd_config<\/em> file for the name of the AuthorizedKeysFile, e.g.<\/p>\n

          \r\nAuthorizedKeysFile .ssh\/authorized_keys2\r\n<\/pre>\n
          * Open or create a file named authorized_keys2<\/em>:<\/p>\n
          \r\ncd ~\r\nmkdir .ssh\r\nchmod 700 .ssh\r\ncd ~\/.ssh\r\nvi authorized_keys2\r\n<\/pre>\n
          * Copy and paste the public key from PuTTY Key Generator window<\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          to the authorized_keys2<\/em> file:<\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          * Alternatively, you can convert SSH2 public key to OpenSSH key before appending to authorized_keys2<\/em> with following command:<\/p>\n
          \r\nssh-keygen -i -f ~\/.ssh\/ssh2_key.pub >> ~\/.ssh\/authorized_keys2\r\n<\/pre>\n
          * chmod for authorized_keys2<\/em><\/p>\n
          \r\nchmod 600 authorized_keys2\r\n<\/pre>\n
          Configure Private Key for PuTTY Session<\/h2><\/span>\n
          Add Private key to PuTTY SSH Authentication Agent<\/h3><\/span>\n
          * Go to the PuTTY program directory
          \n* Double click PAGEANT.EXE<\/em> file
          \n– Agent is open up in the task panel<\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          * Right click the agent icon in the task panel and select Add Key<\/em><\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          * Browse to myPuTTYPrivateKey.ppk<\/em> file and click Open<\/em>
          \n* Enter passphase for key<\/em> and click OK<\/em>:<\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          Start PuTTY Session<\/h3><\/span>\n
          * Open PuTTY<\/em>
          \n* Load a saved session
          \n* Select Connection > SSH > Auth<\/em>
          \n* Set Private key file for authentication<\/em> to private key file: C:\\Users\\Jimmy\\MyPrivateKey.ppk<\/strong><\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          * Set Host Name in the format: user@server<\/em>, e.g. oracle@dbserver<\/p>\n
          \"\"<\/a><\/h6><\/span>\n
          * Save the session again
          \n* Click Open to start the session. You should be able to login without password.<\/p>\n","protected":false},"excerpt":{"rendered":"
          On Client Machine Generate Private\/Public Key Pair with PUTTYGEN.EXE * Change directory to PuTTY installation directory, e.g. C:\\prog\\PuTTY * Double click PUTTYGEN.EXE * Select: – Type of key to generate: SSH-2 RSA – Number of bits in a generated key: … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[451],"tags":[452,639],"class_list":["post-9250","post","type-post","status-publish","format-standard","hentry","category-ssh","tag-putty","tag-ssh"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8cRUO-2pc","_links":{"self":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/9250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9250"}],"version-history":[{"count":6,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/9250\/revisions"}],"predecessor-version":[{"id":12251,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/9250\/revisions\/12251"}],"wp:attachment":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}