1 files changed, 7 insertions, 13 deletions
diff --git a/openssl/src/crypto/rand.rs b/openssl/src/crypto/rand.rs
index ba57a8a1..519449e9 100644
--- a/openssl/src/crypto/rand.rs
+++ b/openssl/src/crypto/rand.rs
@@ -1,19 +1,13 @@
 use libc::c_int;
 use ffi;
+use error::ErrorStack;
 
-pub fn rand_bytes(len: usize) -> Vec<u8> {
+pub fn rand_bytes(buf: &mut [u8]) -> Result<(), ErrorStack> {
     unsafe {
-        let mut out = Vec::with_capacity(len);
-
         ffi::init();
-        let r = ffi::RAND_bytes(out.as_mut_ptr(), len as c_int);
-        if r != 1 as c_int {
-            panic!()
-        }
-
-        out.set_len(len);
-
-        out
+        assert!(buf.len() <= c_int::max_value() as usize);
+        try_ssl_if!(ffi::RAND_bytes(buf.as_mut_ptr(), buf.len() as c_int) != 1);
+        Ok(())
     }
 }
 
@@ -23,7 +17,7 @@ mod tests {
 
     #[test]
     fn test_rand_bytes() {
-        let bytes = rand_bytes(32);
-        println!("{:?}", bytes);
+        let mut buf = [0; 32];
+        rand_bytes(&mut buf).unwrap();
     }
 }