HMAC is deprecated in 3.0 getting error 'HMAC' was not declared in this scope

Narayana, Sunil Kumar sanarayana at
Thu Nov 26 17:32:20 UTC 2020

                We are trying to upgrade our application from openssl usage of 1.0.2 to openssl 3.0, during which we observe following errors.
Need help to identify the alternatives.

Error1 :  error: 'HMAC' was not declared in this scope HMAC(EVP_sha1(), (const void*) cookie_secret, COOKIE_SECRET_LENGTH,

  *   HMAC is deprecated in 3.0 but not finding the suitable replacement to use in application.
  *   We feel we can use EVP_MAC API's, but not sure the exact API which replaces HMAC

Error2 : error: invalid use of incomplete type 'SSL' {aka 'struct ssl_st'} ssl->d1->mtu = MAX_SEND_PKT_SIZE;

  *   Our application is trying to set the MTU size but can not access d1 of 'struct ssl_st'.
  *   Any utility exposed to applications similar to API dtls1_ctrl which is mostly an internal one


Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. that
is confidential and/or proprietary for the sole use of the intended recipient.  Any review, disclosure, reliance or
distribution by others or forwarding without express permission is strictly prohibited.  If you are not the intended
recipient, please notify the sender immediately and then delete all copies, including any attachments.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the openssl-users mailing list