1. Essentials Guide
  2. Oracle USM Supporting the IMS Core
  3. SIP Digest User Authentication
  4. SIP Authentication Challenge

SIP Authentication Challenge

When the Oracle Communications Unified Session Manager receives a response from the HSS including the hash value for the user, it sends a SIP authentication challenge to the endpoint, if the endpoint did not provide any authentication headers in its initial contact the with Oracle Communications Unified Session Manager. If the endpoint is registering, the Oracle Communications Unified Session Manager replies with a 401 Unauthorized message with the following WWW-Authenticate header: 

WWW-Authenticate: Digest realm="atlanta.com", domain="sip:boxesbybob.com", qop="auth", nonce="f84f1cec41e6cbe5aea9c8e88d359", opaque="", stale=FALSE, algorithm=MD5

If the endpoint initiates any other request to the Oracle Communications Unified Session Manager besides REGISTER, the Oracle Communications Unified Session Manager replies with a 407 Proxy Authentication Required message with the following Proxy-Authenticate header: 

Proxy-Authenticate: Digest realm="atlanta.com", qop="auth",      nonce="f84f1cec41e6cbe5aea9c8e88d359", opaque="", stale=FALSE, algorithm=MD5