From 16e8fbc31ee2f144b43a0a8353d6f85514081bf3 Mon Sep 17 00:00:00 2001
From: Bradley Beddoes <bradleybeddoes@gmail.com>
Date: Wed, 9 Aug 2017 13:21:57 +1000
Subject: [PATCH] Fix EC_KEY_set_public_key_affine_coordinates

Previous definition incorrectly used `const` pointers but the
underpinning library definition (unfortunately) does not.
---
 openssl-sys/src/lib.rs |  2 +-
 openssl/src/ec.rs      | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index 69c95395..f0e3e18a 100644
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -1674,7 +1674,7 @@ extern "C" {
     pub fn EC_KEY_generate_key(key: *mut EC_KEY) -> c_int;
     pub fn EC_KEY_check_key(key: *const EC_KEY) -> c_int;
     pub fn EC_KEY_free(key: *mut EC_KEY);
-    pub fn EC_KEY_set_public_key_affine_coordinates(key: *mut EC_KEY, x: *const BIGNUM, y: *const BIGNUM) -> c_int;
+    pub fn EC_KEY_set_public_key_affine_coordinates(key: *mut EC_KEY, x: *mut BIGNUM, y: *mut BIGNUM) -> c_int;
 
     #[cfg(not(osslconf = "OPENSSL_NO_EC2M"))]
     pub fn EC_GF2m_simple_method() -> *const EC_METHOD;
diff --git a/openssl/src/ec.rs b/openssl/src/ec.rs
index e221b411..0a3cfcb6 100644
--- a/openssl/src/ec.rs
+++ b/openssl/src/ec.rs
@@ -462,8 +462,8 @@ impl EcKeyBuilderRef {
 
     /// Sets the public key based on affine coordinates.
     pub fn set_public_key_affine_coordinates(&mut self,
-                                             x: &BigNumRef,
-                                             y: &BigNumRef)
+                                             x: &mut BigNumRef,
+                                             y: &mut BigNumRef)
                                              -> Result<&mut EcKeyBuilderRef, ErrorStack> {
         unsafe {
             cvt(ffi::EC_KEY_set_public_key_affine_coordinates(self.as_ptr(), 
@@ -571,12 +571,12 @@ mod test {
         let y = data_encoding::base64url::decode_nopad("4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM".as_bytes())
             .unwrap();
 
-        let xbn = BigNum::from_slice(&x).unwrap();
-        let ybn = BigNum::from_slice(&y).unwrap();
+        let mut xbn = BigNum::from_slice(&x).unwrap();
+        let mut ybn = BigNum::from_slice(&y).unwrap();
 
         let mut builder = EcKeyBuilder::new().unwrap();
         builder.set_group(&group).unwrap();
-        builder.set_public_key_affine_coordinates(&xbn, &ybn).unwrap();
+        builder.set_public_key_affine_coordinates(&mut xbn, &mut ybn).unwrap();
 
         let ec_key = builder.build();
         assert!(ec_key.check_key().is_ok());