Copy over getter macros

openssl-sys/src/lib.rs

@@ -600,6 +600,18 @@ pub unsafe fn SSL_set_tlsext_host_name(s: *mut SSL, name: *mut c_char) -> c_long
     SSL_ctrl(s, SSL_CTRL_SET_TLSEXT_HOSTNAME, TLSEXT_NAMETYPE_host_name, name as *mut c_void)
 }
 
+pub unsafe fn EVP_CIPHER_block_size(e: *const EVP_CIPHER) -> c_int {
+    (*e).block_size
+}
+
+pub unsafe fn EVP_CIPHER_key_length(e: *const EVP_CIPHER) -> c_int {
+    (*e).key_len
+}
+
+pub unsafe fn EVP_CIPHER_iv_length(e: *const EVP_CIPHER) -> c_int {
+    (*e).iv_len
+}
+
 // True functions
 extern "C" {
     pub fn ASN1_INTEGER_set(dest: *mut ASN1_INTEGER, value: c_long) -> c_int;

openssl/src/crypto/symm.rs

@@ -79,7 +79,7 @@ impl Type {
     /// Returns the length of keys used with this cipher.
     pub fn key_len(&self) -> usize {
         unsafe {
-            (*self.as_ptr()).key_len as usize
+            ffi::EVP_CIPHER_key_length(self.as_ptr()) as usize
         }
     }
 
@@ -87,7 +87,7 @@ impl Type {
     /// cipher does not use an IV.
     pub fn iv_len(&self) -> Option<usize> {
         unsafe {
-            let len = (*self.as_ptr()).iv_len as usize;
+            let len = ffi::EVP_CIPHER_iv_length(self.as_ptr()) as usize;
             if len == 0 {
                 None
             } else {
@@ -103,7 +103,7 @@ impl Type {
     /// Stream ciphers such as RC4 have a block size of 1.
     pub fn block_size(&self) -> usize {
         unsafe {
-            (*self.as_ptr()).block_size as usize
+            ffi::EVP_CIPHER_block_size(self.as_ptr()) as usize
         }
     }
 }