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winpgnt: fix GUI removal of encrypted keys.

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The GUI loop that responded to the 'Remove Key' button in the key list
worked by actually trying to retrieve a pointer to the ssh_key for a
stored key, and then passing that back to the delete function. But
when a key is encrypted, that pointer is NULL, so we segfaulted.

Fixed by changing pageant_delete_ssh2_key() to take a numeric index in
the list instead of a key pointer.
This commit is contained in:
Simon Tatham
2021-04-02 11:30:18 +01:00
parent b0f9e3a6ad
commit fbab166728
3 changed files with 12 additions and 33 deletions
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15
windows/winpgnt.c
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@ -505,9 +505,6 @@ static void prompt_add_keyfile(bool encrypted)
static INT_PTR CALLBACK KeyListProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam)
{
RSAKey *rkey;
ssh2_userkey *skey;
static const struct {
const char *name;
FingerprintType value;
@ -615,24 +612,16 @@ static INT_PTR CALLBACK KeyListProc(HWND hwnd, UINT msg,
* things hence altering the offset of subsequent items
*/
for (i = sCount - 1; (itemNum >= 0) && (i >= 0); i--) {
skey = pageant_nth_ssh2_key(i);
if (selectedArray[itemNum] == rCount + i) {
pageant_delete_ssh2_key(skey);
ssh_key_free(skey->key);
sfree(skey);
pageant_delete_nth_ssh2_key(i);
itemNum--;
}
}
/* do the same for the rsa keys */
for (i = rCount - 1; (itemNum >= 0) && (i >= 0); i--) {
rkey = pageant_nth_ssh1_key(i);
if(selectedArray[itemNum] == i) {
pageant_delete_ssh1_key(rkey);
freersakey(rkey);
sfree(rkey);
pageant_delete_nth_ssh1_key(i);
itemNum--;
}
}