adding Env::enc_env

src/env.rs

@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use crate::ffi_util::from_cstr;
+use crate::ffi_util::{from_cstr, opt_bytes_to_ptr};
 use libc::{self, c_char, c_int};
 
 use crate::{ffi, Error};
@@ -43,7 +43,17 @@ impl Env {
     pub fn new() -> Result<Self, Error> {
         let env = unsafe { ffi::rocksdb_create_default_env() };
         if env.is_null() {
-            Err(Error::new("Could not create mem env".to_owned()))
+            Err(Error::new("Could not create default env".to_owned()))
+        } else {
+            Ok(Self(Arc::new(EnvWrapper { inner: env })))
+        }
+    }
+
+    /// Returns encrypted env. they key must be a 32 bytes long array of u8
+    pub fn enc_env(key: [u8; 32]) -> Result<Self, Error> {
+        let env = unsafe { ffi::rocksdb_create_encrypted_env(opt_bytes_to_ptr(Some(&key))) };
+        if env.is_null() {
+            Err(Error::new("Could not create encrypted env".to_owned()))
         } else {
             Ok(Self(Arc::new(EnvWrapper { inner: env })))
         }