Flatten crypto module

1 files changed, 24 insertions, 0 deletions

diff --git a/openssl/src/rand.rs b/openssl/src/rand.rs
new file mode 100644
index 00000000..c1c49e7b
--- /dev/null
+++ b/openssl/src/rand.rs
@@ -0,0 +1,24 @@
+use libc::c_int;
+use ffi;
+
+use cvt;
+use error::ErrorStack;
+
+pub fn rand_bytes(buf: &mut [u8]) -> Result<(), ErrorStack> {
+    unsafe {
+        ffi::init();
+        assert!(buf.len() <= c_int::max_value() as usize);
+        cvt(ffi::RAND_bytes(buf.as_mut_ptr(), buf.len() as c_int)).map(|_| ())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::rand_bytes;
+
+    #[test]
+    fn test_rand_bytes() {
+        let mut buf = [0; 32];
+        rand_bytes(&mut buf).unwrap();
+    }
+}