Each RSA key pair consists of a private and a public key. There can be up to three key pair sets each consisting of three key pairs with lengths of 768, 1024, 2048. When a key pair set is created, new key pairs for each of these lengths are always created.
Public keys are stored under the following name:
SYSPKF.R<key reference>.L<key length>
The storage location is platform-dependent, see the relevant openFT "Installation and Operation" manual.
The key reference is a numerical designator for the version of the key pair. The public key files are text files that are created using the character code of the respective operating system, i.e. by default:
BS2000 systems: Value of the system parameter HOSTCODE
z/OS: IBM1047
Unix systems: ISO8859-1
Windows systems: CP1252
Private keys are internally administered by openFT.
Comments
For each key pair set, comments can be stored which are written in the first lines of the public key files when a key pair set is created. The comments could, for example, contain the contact information of the FT administrator on duty, the computer name, or similar information that is important for partners. The comments in the editable text file SYSPKF.COMMENT can only be a maximum of 78 characters long. When a key pair set is updated, any subsequently updated comments are taken over from this file into existing public key files.