CUPC will stores its certificate and private key using SIP PUBLISH method and retrieve its public/private key pair by subscribing (using SIP SUBSCRIBE) to credentials event package.
The steps involved for CUPC to generate and store (and retrieve) their pubic/private keys are:
1. User login into CUPC. As a part of its configuration download from CUPS, CUPC will get the information that if is configured for encrypted CCM config file. If it is configured for encrypted CCM config file then CUPC needs to have it own public/private key pair. CUPC will always gets its certificate & private keys from CUPS’s keymgmt. CUPC will always store private key as encrypted blob at CUPS. The key to encrypt the private key will be derived from a pass phrase which user needs to enter very first time it login into CUPC. CUPC can store this pass phrase securely into Laptop/computer. Whether or not CUPC should store pass phrase locally, could be based on the “Password remember” check box. If “Password......
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