Usage of Keystores 

Note the following when using the SAPSSLA.pse, SAPSSLC.pse, and SAPSSLS.pse keystores.

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●      SAPSSLS.pse Keystore in SECUDIR

A SAPSSLS.pse keystore has to exist in the directory that you have defined using the SECUDIR environment variable. This is because SAPCYPTOLIB (sapcrypto.dll (Windows) or libsapcrypto.<ext> (UNIX)) is only initialized if a keystore in the form SAPSSLS.pse exists. Therefore, check existing keystores before creating and configuring new keystores, and make sure that SAPSLLS.pse does not already exist.

●      Access Sequence

SAPCRYPTOLIB accesses existing keystores in the following sequence:

1. SAPSSLA.pse ® 2. SAPSSLC.pse ® 3. SAPSSLS.pse

If these keystores exist, you have to import your certificates to the keystores in the following order:

1. Import the certificate to SAPSSLA.pse.

2. Import the certificate to SAPSSLC.pse.

3. Import the certificate to SAPSSLS.pse.

This sequence is only valid for anonymous client authentication such as that configured between the portal Web server and the TREX preprocessor.

●      Style

For the keystore, write the part of the name that appears before the period in capitals (for example, SAPSSL.pse) and use lowercase for the file extension (for example, SAPSSL.pse).

●      Initializing Key Stores/Access Permissions to Key Stores/Creating Active  Credentials

After you have created a keystore, you have to initialize it for use. The server must have active credentials at runtime. To produce active credentials, you must therefore use the configuration tool’s seclogin command to open the server’s key store. It is also very important to create the credential for the user who runs the server’s process. For example, for a TREX server, the user is typically <sapsid>adm (UNIX) or SAPService<SAPSID> (Windows).

The credentials are located in the cred_v2 file in the directory specified in the SECUDIR environment variable. Make sure that only the user under which the TREX service runs has access to this file (including read access).

On Windows, you must also give the <SAPSID>adm operating system user that was created during the TREX installation access permission to the key stores; otherwise it cannot access the files. You do this by entering the following:

○       Windows: sapgenpse seclogin -p SAPS<SLS_or_NCS>.pse -O SAPService<SAPSID>

○       UNIX: sapgenpse seclogin -p SAPS<SLS_or_NCS>.pse -O <SAPSID>adm

When you installed TREX, you created a separate user for each TREX instance. This user has access to all files and directories that belong to the instance in question. The specification <instance_number> must match the number that you specified when you installed the TREX instance.

Command	Function
seclogin	Function of SAPGENPSE that you use to initialize a new keystore for use.
-p SAPSSLS.pse or SAPSNCS.pse	Specify the file name of the keystore that you want to initialize.
-O SAPService<SAPSID> or <SAPSID>adm	You use this command to give the SAPService <SAPSID> or <SAPSID>adm user access to the keystore. The SAPService<SAPSID> operating system user was created during the TREX installation.

●      Using SAPGENPSE to Extend Expired Certificates

When the certificate that you have stored in a keystore expires, you can use SAPGENPSE to extend it again.

You do this by entering the following:

sapgenpse gen_pse -onlyreq -p sapSSLS.pse -r certreq_pse.txt

Command	Function
gen_pse	SAPGENPSE function that allows you to generate a certificate request for a certificate extension for a keystore that already exists in this case.
-onlyreq	Generates a certificate request for an existing keystore.
-p SAPSSLS.pse	You specify the file name of the keystore that contains the certificate that you want to extend here.
-r certreq_pse.txt	Generates a certification request for your certification authority (CA).

Send the certreq_pse.txt certification request to your CA.

Once you have received a response from your CA in the form certresp_pse.cer, you import the extended certificate using the following SAPGENPSE command:

sapgenpse import_own_cert -p sapSSLS.pse -c certresp_pse.cer

Command	Function
import_own_cert	Imports the response to a certification request from the CA.
-p SAPSSLS.pse	You specify the file name of the keystore that contains the certificate that you want to extend here.
-c certresp_pse.cer	File name that contains the certificate extended by your CA.

Result

You use the SAPGENPSE cryptography tool to configure secure communication between the TREX preprocessor and the Web server of the application using TREX and between the TREX Web server and the TREX name server.

You start the SAPGENPSE cryptography tool using a prompt.

See:

●      TREX Preprocessor and Application Web Server (HTTPS)   

●      TREX Web Server and TREX Name Server (HTTPS)    

●      SNC Configuration on the TREX Server    

●      Joining TREX and Application Security Information    

●      Export and Import of Application Certificates     

●      Export and Import of TREX Certificates