Enable CBC Ciphers in B2Bi v5.2.6.4, B2Bi v6.0, SFG v2.2.6.4 and SFG v6.0
Some of the IBM Sterling B2B Integrator(SI) customers wants to avoid SSH handshake using CBC Cipher as it is vulnerable. The link http://www.kb.cert.org/vuls/id/958563 explains that CBC Ciphers are security vulnerable and the solution is to use CTR Cipher instead of CBC Cipher. However, in SI versions 5020602 and 5020603, maverick (the third party api used for SSH/SFTP) version used is 1.4.60 which mandates that CBC Cipher should be present in Client side. Hence, disabling the CBC support using the security property supportCBCCiphers=false will result in SFTP communication failure with key based authentication. To enforce the use of CTR Cipher in SI, we have introduced two new properties : SSHServerCipherList, SSHClientCipherList a) security.SSHServerCipherList is the property to restrict the list of server side ciphers. In the SFTP Server adapter, "Preferred Cipher" drop down will pick the values specified in this property list. b) security.SSHClientCipherList is...