add support for sips uri (with explicit port number)

[nieluj]

This patch adds support for sips uri when calculating the salt value for SIP Digest authentication.

[magnumripper]

Thanks! Did you change the input format, though? In that case we'd need to fix sipdump2john.py too, before I merge this. Or am I just confused?

[nieluj]

indeed, the script sipdump2john.py needed to be modified to reflect the changes in sip_fmt_plug.c. By the way, I fixed a bug introduced since 1.7.9-jumbo6 : in the latest version I cloned, the salt value was a static variable of the get_salt function. The salt value of the current hash was overwritten by the test vectors, hence it was impossible to crack anything (besides the hash from the latest test vector).

I replaced this static variable by a dynamic memory allocation (using mem_calloc_tiny) to fix this behaviour but it may not be the cleaner way to do so (because the salt variable is never freed explicitly, this could cause a memory leak).