Merge pull request #29 from G-Core/feat/proxywasm_secret

proxywasm secret methods

Author: ruslanti

src/lib.rs

@@ -16,6 +16,8 @@ use crate::gcore::fastedge::http::{Error as HttpError, Method, Request, Response
 
 /// Implementation of Outbound HTTP component
 mod http_client;
+/// FastEdge ProxyWasm module extension
+pub mod proxywasm;
 
 pub mod wasi_nn {
     #![allow(missing_docs)]

src/proxywasm.rs

@@ -0,0 +1,43 @@
+extern "C" {
+    fn proxy_get_secret(
+        key_data: *const u8,
+        key_size: usize,
+        return_value_data: *mut *mut u8,
+        return_value_size: *mut usize,
+    ) -> u32;
+}
+
+/// ProxyWasm secret interface
+pub mod secret {
+    use crate::proxywasm::proxy_get_secret;
+    use std::ptr::null_mut;
+
+    /// Get secret method.
+    /// return None if secret not found for given key
+    pub fn get(key: &str) -> Result<Option<Vec<u8>>, u32> {
+        let mut return_data: *mut u8 = null_mut();
+        let mut return_size: usize = 0;
+        unsafe {
+            match proxy_get_secret(
+                key.as_ptr(),
+                key.len(),
+                &mut return_data,
+                &mut return_size,
+            ) {
+                0 => {
+                    if !return_data.is_null() {
+                        Ok(Some(Vec::from_raw_parts(
+                            return_data,
+                            return_size,
+                            return_size,
+                        )))
+                    } else {
+                        Ok(None)
+                    }
+                }
+                1 => Ok(None),
+                status => panic!("unexpected status: {}", status),
+            }
+        }
+    }
+}