A step-by-step guide for enabling EFS keystore access while OpenSSH Public Key Authentication is used
What is EFS?
Dead by daylight steam key generator. In general, the Encrypted Files System (EFS) support on AIX enables individual users on the system to encrypt their data and also access it through keyed protection. Users will be able to setup keys and assign a default key for EFS. These keys are stored in cryptographically protected key store and upon successful login, the user's keys are loaded into the kernel and associated with the kernel processes.
Creating a KeyStore in JKS Format. This section explains how to create a KeyStore using the JKS format as the database format for both the private key, and the associated certificate or certificate chain. By default, as specified in the java.security file, keytool uses JKS as the format of the key and certificate databases (KeyStore. Set /keystore-location to the location and filename of the keystore file where you want to store the generated key. Set password to whatever password that you want to use as the keystore password. Follow the prompts to complete. Do not include any punctuation in the name of your organization, otherwise the Java Certificate tool fails when attempting to generate the request.
Private keys are associated to users and groups. These keys are stored in keystores and are protected by passwords. A user keystore contains the user's private key and also password to open the user's group keystores; the group keystores contain the groups' private keys.
When a process opens a keystore, either at user login time or using a specific EFS user command, the keys contained in this keystore (and related keystores) are loaded in the kernel and associated with the process credentials. Later on,when the process needs to open an EFS protected file, these credentials are tested. If a key matching the file protection is found, then the process is able to decrypt the file key and therefore the file content.
Keystore creation or opening can happen at login time, by the way of an EFS LAM (old) or PAM (new) module. These modules, as well as the commands (for example, chmod) make calls to some EFS APIs provided by a libefs.a library. Two user commands exist, efsmgr and efskeymgr, to give some control over EFS to the user and administrator.
How to setup Public Key Authentication in OpenSSH
Create a user on the client side and generate keys for this user. Public-private key pairs can be generated using the ssh-keygen command.
Similarly, any number of a Client user's public key can be copied in the file ~/.ssh/authorized_keys file on server user account.
Blink Failed To Load Generated Key Pair From Keystore ComputerAIX EFS Configurations
EFS has to be enabled on the server side using the efsenable command. This creates an admin keystore. The keystore gets created for a user in two cases.
The path where user keystore gets created on the system is /var/efs/users/<userlogin>/keystore.
The format of user keystore is in PKCS#12 which contains public and private objects. Private objects are protected by user access key. This user access key is nothing but a hash of a user-defined password (either login password or another password specific to EFS).
Public key cookie needs to be created and inserted into the keystore on server side. User invokes the efskeymgr command to insert the cookie. A public key cookie is the passwd encrypted with users public key.
The following steps show how to create a keystore for a user and insert the public key cookies.
When all the previous configuration setting are complete, run the ssh to log onto the remote machine using the public key authentication.
Run the following command to log on to the remote machine:
Blink Failed To Load Generated Key Pair From Keystore MacVerify the authentication and EFS login
The OpenSSH client user ram is all set for Public Key authentication to user laxman on the OpenSSH server with EFS login. Verify the same with ssh login from client:
Applications for this setup
This setup can be used along with DB2 UDB DPF for which OpenSSH public key authentication can be used. The DB2 tables are encrypted using EFS.
Troubleshooting
Check if all the configurations listed above have been performed. Check if the public key cookie is inserted properly byefskeymgr command by verifying the keystore file size before and after the insertion. Enable debug for sshd and check if any failures. Also, verify once with password authentication if the account login and efs login succeed.
Downloadable resourcesBlink Failed To Load Generated Key Pair From Keystore IphoneRelated topicsBlink Failed To Load Generated Key Pair From Keystore Pdf
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