-extern int ecdsa_key_create(uint8_t * key_d, uint8_t *key_xy);
-extern int ecdsa_signature_create(uint8_t *key_d, uint8_t *key_xy, uint8_t *input, int length, uint8_t *signature, size_t *signaturelen);
-extern int ecdsa_signature_verify(uint8_t *key_xy, uint8_t *input, int length, uint8_t *signature, size_t signaturelen);
+extern int ecdsa_key_create(mbedtls_ecp_group_id curveID, uint8_t * key_d, uint8_t *key_xy);
+extern int ecdsa_public_key_from_pk(mbedtls_pk_context *pk, mbedtls_ecp_group_id curveID, uint8_t *key, size_t keylen);
+extern int ecdsa_signature_create(mbedtls_ecp_group_id curveID, uint8_t *key_d, uint8_t *key_xy, uint8_t *input, int length, uint8_t *signature, size_t *signaturelen, bool hash);
+extern int ecdsa_signature_verify(mbedtls_ecp_group_id curveID, uint8_t *key_xy, uint8_t *input, int length, uint8_t *signature, size_t signaturelen, bool hash);
+extern int ecdsa_signature_r_s_verify(mbedtls_ecp_group_id curveID, uint8_t *key_xy, uint8_t *input, int length, uint8_t *r_s, size_t r_s_len, bool hash);