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engine: server: validate uuid in protinfo, it's an md5 string

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This commit is contained in:
Alibek Omarov 2025-03-01 22:45:01 +03:00
parent fc2888e107
commit c76752cc5f
2 changed files with 25 additions and 17 deletions
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6
engine/server/sv_client.c
View file

@ -355,12 +355,6 @@ static void SV_ConnectClient( netadr_t from )
if( !SV_ProcessUserAgent( from, protinfo ))
return;
if( Q_strlen( Info_ValueForKey( protinfo, "uuid" )) != 32 )
{
SV_RejectConnection( from, "invalid authentication certificate length\n" );
return;
}
// extract qport from protocol info
qport = Q_atoi( Info_ValueForKey( protinfo, "qport" ));
extensions = Q_atoi( Info_ValueForKey( protinfo, "ext" ));

36
engine/server/sv_main.c
View file

@ -763,6 +763,31 @@ qboolean SV_ProcessUserAgent( netadr_t from, const char *useragent )
{
const char *input_devices_str = Info_ValueForKey( useragent, "d" );
const char *id = Info_ValueForKey( useragent, "uuid" );
size_t len, i;
len = Q_strlen( id );
if( len != 32 )
{
SV_RejectConnection( from, "invalid authentication certificate\n" );
return false;
}
for( i = 0; i < len; i++ )
{
char c = id[i];
if( !isdigit( id[i] ) && !( c >= 'a' && c <= 'f' ))
{
SV_RejectConnection( from, "invalid authentication certificate\n" );
return false;
}
}
if( SV_CheckID( id ))
{
SV_RejectConnection( from, "You are banned!\n" );
return false;
}
if( !sv_allow_noinputdevices.value && ( !input_devices_str || !input_devices_str[0] ) )
{
@ -796,17 +821,6 @@ qboolean SV_ProcessUserAgent( netadr_t from, const char *useragent )
}
}
if( id )
{
qboolean banned = SV_CheckID( id );
if( banned )
{
SV_RejectConnection( from, "You are banned!\n" );
return false;
}
}
return true;
}