1 files changed, 4 insertions, 0 deletions
diff --git a/src/crypto.c b/src/crypto.c
index 7362ac2..bddb2e6 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -3,3 +3,7 @@
 unsigned i_lr(unsigned y, unsigned offset){
     return ( y << offset ) | ( y >> (32 - offset));
 }
+
+unsigned i_rr(unsigned x, unsigned n) {
+    return (x >> n % 32) | (x << (32-n) % 32);
+}