Remove set_rsa

PKey is reference counted so allowing mutation is unsound

openssl/src/pkey.rs

@@ -6,7 +6,7 @@ use ffi;
 use {cvt, cvt_p};
 use bio::{MemBio, MemBioSlice};
 use dsa::Dsa;
-use rsa::{Rsa, RsaRef};
+use rsa::Rsa;
 use error::ErrorStack;
 use util::{CallbackState, invoke_passwd_cb};
 use types::{OpenSslType, OpenSslTypeRef};
@@ -146,16 +146,6 @@ impl PKey {
             Ok(PKey::from_ptr(evp))
         }
     }
-
-    /// Assign an RSA key to this pkey.
-    pub fn set_rsa(&mut self, rsa: &RsaRef) -> Result<(), ErrorStack> {
-        unsafe {
-            // this needs to be a reference as the set1_RSA ups the reference count
-            let rsa_ptr = rsa.as_ptr();
-            try!(cvt(ffi::EVP_PKEY_set1_RSA(self.0, rsa_ptr)));
-            Ok(())
-        }
-    }
 }
 
 #[cfg(test)]