Fix comment explaining ECDSA public key format
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index be867ad..2dca1a1 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -447,7 +447,7 @@
int key_idx = 0, offset = 0, ret = 0;
const char * serial_port = NULL;
unsigned char func_buffer[2]; /* Op code: 1 + key Id: 1 */
- unsigned char pub_key_buf[65]; /* ECDSA Pub key: 64 + ASN.1 overhead: 1 */
+ unsigned char pub_key_buf[65]; /* ECDSA Pub key: 64 + EC octet string format tag: 1 */
size_t rx_len = 0;
static mbedtls_ecp_keypair ecp_key;