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Status Not under consideration
Workspace Db2
Components Security
Created by Guest
Created on Feb 21, 2018

Allow unencrypted password in an SSL conversation

This is a request to align the behavior of DB2 LUW with that of IBM i and DB2 for z/OS when connecting with a DRDA client.

With the other 2 platforms, if DRDA is configured to require user/password to be sent encrypted with minimum encryption level *AES, clients can send the user/password as unencrypted if the entire conversation is encrypted in SSL.

However, this does not appear to be the case with DB2 LUW - the documentation is silent on the matter, and my experiment (using non-encrypted user & password in an SSL stream) showed failure.

============

DB2 for z/OS:

https://www.ibm.com/support/knowledgecenter/en/SSEPEK_11.0.0/inst/src/tpc/db2z_ipf_tcpalver.html
TCPALVER
YES, CLIENT, NO, SERVER, SERVER_ENCRYPT

default is NO (SERVER)

SERVER_ENCRYPT
A user ID and password are required for connection requests. Kerberos tickets are also accepted. In addition, one of the following must be true:
The user ID and password is AES (Advanced Encryption Standard)-encrypted.
===> The connection is accepted on a port that ensures AT-TLS (Application Transparent - Transport Layer Security) policy protection, such as a Db2 security port (SECPORT). <=====

============

IBM i:

https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_73/ddp/rbal1targetsecurity.htm

The DDM and DRDA® TCP/IP server supports the following forms of password encryption:
Password substitute algorithm
Diffie-Hellman public key algorithm (56 bit *DES or 256 bit *AES)
A strong password substitute algorithm
The client and server negotiate the security mechanism that will be used, and any of the three encryption methods will satisfy the requirement of encrypted password (PWDRQD(*USRENCPWD)),
===> as does the use of Secure Sockets Layer (SSL) data streams ===> .


and
https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/ddp/rbal1sslddm.htm

If you specify PWDRQD(*USRENCPWD) on the Change DDM TCP/IP Attributes (CHGDDMTCPA) command, you can use any valid password along with SSL. This is possible because the system recognizes that the whole data stream, including the password, is encrypted.