Move random_bytes() back to lib/

1 files changed, 0 insertions, 65 deletions

diff --git a/unix.c b/unix.c
index f90f03b9..0566fa56 100644
--- a/unix.c
+++ b/unix.c
@@ -225,69 +225,4 @@ double gettime()
 	return( (double) time->tv_sec + (double) time->tv_usec / 1000000 );
 }
 
-/* A pretty reliable random number generator. Tries to use the /dev/random
-   devices first, and falls back to the random number generator from libc
-   when it fails. Opens randomizer devices with O_NONBLOCK to make sure a
-   lack of entropy won't halt BitlBee. */
-void random_bytes( unsigned char *buf, int count )
-{
-	static int use_dev = -1;
-	
-	/* Actually this probing code isn't really necessary, is it? */
-	if( use_dev == -1 )
-	{
-		if( access( "/dev/random", R_OK ) == 0 || access( "/dev/urandom", R_OK ) == 0 )
-			use_dev = 1;
-		else
-		{
-			use_dev = 0;
-			srand( ( getpid() << 16 ) ^ time( NULL ) );
-		}
-	}
-	
-	if( use_dev )
-	{
-		int fd;
-		
-		/* At least on Linux, /dev/random can block if there's not
-		   enough entropy. We really don't want that, so if it can't
-		   give anything, use /dev/urandom instead. */
-		if( ( fd = open( "/dev/random", O_RDONLY | O_NONBLOCK ) ) >= 0 )
-			if( read( fd, buf, count ) == count )
-			{
-				close( fd );
-				return;
-			}
-		close( fd );
-		
-		/* urandom isn't supposed to block at all, but just to be
-		   sure. If it blocks, we'll disable use_dev and use the libc
-		   randomizer instead. */
-		if( ( fd = open( "/dev/urandom", O_RDONLY | O_NONBLOCK ) ) >= 0 )
-			if( read( fd, buf, count ) == count )
-			{
-				close( fd );
-				return;
-			}
-		close( fd );
-		
-		/* If /dev/random blocks once, we'll still try to use it
-		   again next time. If /dev/urandom also fails for some
-		   reason, stick with libc during this session. */
-		
-		use_dev = 0;
-		srand( ( getpid() << 16 ) ^ time( NULL ) );
-	}
-	
-	if( !use_dev )
-	{
-		int i;
-		
-		/* Possibly the LSB of rand() isn't very random on some
-		   platforms. Seems okay on at least Linux and OSX though. */
-		for( i = 0; i < count; i ++ )
-			buf[i] = rand() & 0xff;
-	}
-}
-