1 files changed, 60 insertions, 0 deletions
diff --git a/vendor/openssl/src/rand.rs b/vendor/openssl/src/rand.rs
new file mode 100644
index 000000000..8317951f8
--- /dev/null
+++ b/vendor/openssl/src/rand.rs
@@ -0,0 +1,60 @@
+//! Utilities for secure random number generation.
+//!
+//! # Examples
+//!
+//! To generate a buffer with cryptographically strong bytes:
+//!
+//! ```
+//! use openssl::rand::rand_bytes;
+//!
+//! let mut buf = [0; 256];
+//! rand_bytes(&mut buf).unwrap();
+//! ```
+use libc::c_int;
+
+use crate::error::ErrorStack;
+use crate::{cvt, LenType};
+use openssl_macros::corresponds;
+
+/// Fill buffer with cryptographically strong pseudo-random bytes.
+///
+/// # Examples
+///
+/// To generate a buffer with cryptographically strong random bytes:
+///
+/// ```
+/// use openssl::rand::rand_bytes;
+///
+/// let mut buf = [0; 256];
+/// rand_bytes(&mut buf).unwrap();
+/// ```
+#[corresponds(RAND_bytes)]
+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 LenType)).map(|_| ())
+    }
+}
+
+/// Controls random device file descriptor behavior.
+///
+/// Requires OpenSSL 1.1.1 or newer.
+#[corresponds(RAND_keep_random_devices_open)]
+#[cfg(ossl111)]
+pub fn keep_random_devices_open(keep: bool) {
+    unsafe {
+        ffi::RAND_keep_random_devices_open(keep as LenType);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::rand_bytes;
+
+    #[test]
+    fn test_rand_bytes() {
+        let mut buf = [0; 32];
+        rand_bytes(&mut buf).unwrap();
+    }
+}