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child-create: Promote selected DH group, demote proposals that don't contain it

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This commit is contained in:
Tobias Brunner
2018-02-09 10:20:05 +01:00
parent ff79020cd2
commit 5a259ade4e
1 changed files with 19 additions and 1 deletions
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src/libcharon/sa/ikev2/tasks/child_create.c
+19 -1
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@@ -277,12 +277,13 @@ static bool ts_list_is_host(linked_list_t *list, host_t *host)
}
/**
* Allocate SPIs and update proposals
* Allocate SPIs and update proposals, we also promote the selected DH group
*/
static bool allocate_spi(private_child_create_t *this)
{
enumerator_t *enumerator;
proposal_t *proposal;
linked_list_t *other_dh_groups;
if (this->initiator)
{
@@ -304,12 +305,29 @@ static bool allocate_spi(private_child_create_t *this)
{
if (this->initiator)
{
other_dh_groups = linked_list_create();
enumerator = this->proposals->create_enumerator(this->proposals);
while (enumerator->enumerate(enumerator, &proposal))
{
proposal->set_spi(proposal, this->my_spi);
/* move the selected DH group to the front, if any */
if (this->dh_group != MODP_NONE &&
!proposal->promote_dh_group(proposal, this->dh_group))
{ /* proposals that don't contain the selected group are
* moved to the back */
this->proposals->remove_at(this->proposals, enumerator);
other_dh_groups->insert_last(other_dh_groups, proposal);
}
}
enumerator->destroy(enumerator);
enumerator = other_dh_groups->create_enumerator(other_dh_groups);
while (enumerator->enumerate(enumerator, (void**)&proposal))
{ /* no need to remove from the list as we destroy it anyway*/
this->proposals->insert_last(this->proposals, proposal);
}
enumerator->destroy(enumerator);
other_dh_groups->destroy(other_dh_groups);
}
else
{