Add ecdsa_init and ecdsa_free
diff --git a/include/polarssl/ecdsa.h b/include/polarssl/ecdsa.h
index f6b1e78..e709b40 100644
--- a/include/polarssl/ecdsa.h
+++ b/include/polarssl/ecdsa.h
@@ -85,6 +85,20 @@
const ecp_point *Q, const mpi *r, const mpi *s);
/**
+ * \brief Initialize context
+ *
+ * \param ctx Context to initialize
+ */
+void ecdsa_init( ecdsa_context *ctx );
+
+/**
+ * \brief Free context
+ *
+ * \param ctx Context to free
+ */
+void ecdsa_free( ecdsa_context *ctx );
+
+/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed