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g10: Fix crash. 

* g10/getkey.c (get_best_pubkey_byname): If 'get_pubkey_byname' does
not return a getkey context, then it can return at most one key,
therefore there is nothing to rank.  Also, always initialize '*retctx'
to be on the safe side.

GnuPG-bug-id: 2828
Fixes: ab89164be0
Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2016-11-07 12:53:17 +01:00
parent 4d7dc432b5
commit 5840353d8b
1 changed files with 4 additions and 3 deletions
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7
g10/getkey.c
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@ -1577,18 +1577,19 @@ get_best_pubkey_byname (ctrl_t ctrl, GETKEY_CTX *retctx, PKT_public_key *pk,
int rc;
struct getkey_ctx_s *ctx = NULL;
if (retctx)
*retctx = NULL;
rc = get_pubkey_byname (ctrl, &ctx, pk, name, ret_keyblock,
NULL, include_unusable, no_akl);
if (rc)
{
if (ctx)
getkey_end (ctx);
if (retctx)
*retctx = NULL;
return rc;
}
if (is_valid_mailbox (name))
if (is_valid_mailbox (name) && ctx)
{
/* Rank results and return only the most relevant key. */
struct pubkey_cmp_cookie best = { 0 }, new;