mbedtls_ecp_write_key_ext(): make key const
Having a non-const `key` parameter was anotherf defect of
mbedtls_ecp_write_key(). Take this opportunity to fix it.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index e2ae074..d8f73ae 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -1396,7 +1396,7 @@
* set in \p key.
* \return Another negative error code on different kinds of failure.
*/
-int mbedtls_ecp_write_key_ext(mbedtls_ecp_keypair *key,
+int mbedtls_ecp_write_key_ext(const mbedtls_ecp_keypair *key,
size_t *olen, unsigned char *buf, size_t buflen);
/**
diff --git a/library/ecp.c b/library/ecp.c
index 0dadaea..427059b 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -3335,7 +3335,7 @@
}
#endif /* MBEDTLS_DEPRECATED_REMOVED */
-int mbedtls_ecp_write_key_ext(mbedtls_ecp_keypair *key,
+int mbedtls_ecp_write_key_ext(const mbedtls_ecp_keypair *key,
size_t *olen, unsigned char *buf, size_t buflen)
{
size_t len = (key->grp.nbits + 7) / 8;