Updated doxygen documentation in header files and HTML pages
diff --git a/include/polarssl/oid.h b/include/polarssl/oid.h
index 025a15f..ddaf8a7 100644
--- a/include/polarssl/oid.h
+++ b/include/polarssl/oid.h
@@ -413,7 +413,7 @@
  * \return         0 if successful, or POLARSSL_ERR_OID_NOT_FOUND
  */
 int oid_get_oid_by_sig_alg( pk_type_t pk_alg, md_type_t md_alg,
-                            const char **oid_str );
+                            const char **oid );
 
 /**
  * \brief          Translate hash algorithm OID into md_type
@@ -444,7 +444,7 @@
  *
  * \return         0 if successful, or POLARSSL_ERR_OID_NOT_FOUND
  */
-int oid_get_oid_by_md( md_type_t md_alg, const char **oid_str );
+int oid_get_oid_by_md( md_type_t md_alg, const char **oid );
 
 #if defined(POLARSSL_CIPHER_C)
 /**