For each Oracle9i Database (9.2.0.8) instance that you upgrade to Oracle Database 12c Release 1 (12.1), perform the following steps:
Use Oracle Wallet Manager to disable automatic login for the database wallet.
Copy the database distinguished name (DN) from the initialization parameter rdbms_server_dn to a file in a secure location.
Upgrade the database to Oracle Database 12c Release 1 (12.1).
Depending on where your database admin directory is stored, move the database wallet either to $ORACLE_BASE/admin/olddbuniquename/wallet or $ORACLE_HOME/admin/olddbuniquename/wallet. Note that $ORACLE_HOME is for the new Oracle Database 12c Release 1 (12.1). You may have to create the wallet directory.
Copy the old $ORACLE_HOME/network/admin/ldap.ora file to the new $ORACLE_HOME/ldap/admin/ldap.ora file. Alternatively, you can use Oracle Net Configuration Assistant to create a new ldap.ora file.
Use the command-line utility, mkstore, to put the database DN (from the file in the previously created secure directory location) into the wallet by using the following syntax:
mkstore -wrl database_wallet_location -createEntry ORACLE.SECURITY.DN database_DN
You will be prompted for the wallet password.
If you make a mistake in the mkstore command, then you can use the -modifyEntry option to correct it.
Use Database Configuration Assistant to generate the database-to-directory password in the database wallet. Choose the Modify Database option.
Use Oracle Wallet Manager to re-enable automatic login for the database wallet.
Use Oracle Net Manager to set the new wallet location in the sqlnet.ora file to the directory specified in step 4.
The default for the nickname attribute, such as CN, remains unchanged. The upgrade process does not change the default nickname attribute setting. After upgrading from Oracle Internet Directory Release 9.2 to Release 9.0.4, if you are unable to log in to Oracle Database 12c Release 1 (12.1), then you must use the DAS-based Oracle Internet Directory Self-Service Console to reset your password.