The database stores the key material as hex-ascii, we thus need to go
through osmo_hexparse() when reading. We could also store the material
as BLOB in the database. That would however complicate matters, as it
would basically mean using the sqlite3 command to manually
inspect/modify data from the console would no longer be easily possible.
Using this commit I have 2G authentication working against osmo-sgsn
with GSUP and 'auth policy remote'.
When responding to a SendAuthInfo.req, we need to differentiate
an error case caused by an unknown IMSI, or an error caused by
an error regarding accessing the database or data integrity.
Harald Welte