Provide magic function when compiling against openssl

Author: pprindeville

libtac/lib/magic.c

@@ -90,4 +90,35 @@ magic()
     return (u_int32_t)random();
 }
 
+#else
+
+#include <openssl/rand.h>
+
+INITIALIZER(magic_init)
+{
+    long seed = 0;
+    struct timeval t;
+
+    RAND_load_file("/dev/urandom", sizeof(seed));
+
+    gettimeofday(&t, NULL);
+    seed = gethostid() ^ t.tv_sec ^ t.tv_usec ^ getpid();
+
+    RAND_seed(&seed, sizeof(seed));
+}
+
+/*
+ * magic - Returns the next magic number.
+ */
+u_int32_t
+magic()
+{
+    u_int32_t num;
+
+    RAND_bytes((unsigned char *)&num, sizeof(num));
+
+    return num;
+}
+
 #endif
+