[openssl/openssl] 76a597: Fix the export routines to not return success if p...

[matt]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.openssl.org/openssl/openssl
  Commit: 76a597c512a055556a5033c69ce02d6330e8a2af
      https://github.openssl.org/openssl/openssl/commit/76a597c512a055556a5033c69ce02d6330e8a2af
  Author: Matt Caswell <matt at openssl.org>
  Date:   2022-06-15 (Wed, 15 Jun 2022)

  Changed paths:
    M providers/implementations/keymgmt/dh_kmgmt.c
    M providers/implementations/keymgmt/dsa_kmgmt.c
    M providers/implementations/keymgmt/ec_kmgmt.c
    M providers/implementations/keymgmt/rsa_kmgmt.c

  Log Message:
  -----------
  Fix the export routines to not return success if param alloc failed

We fix the dsa, dh, ec and rsa export routines so that they are
consistent with each other and do not report success if the allocation
of parameters failed.

This is essentially the same fix as applied in #18483 but applied to all
relevant key types.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18507)

(cherry picked from commit 46c1c2d7fa9153da4eb5e1aefd7b0139dc507c00)