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Pageant: introduce an API for passphrase prompts.

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This begins to head towards the goal of storing a key file encrypted
in Pageant, and decrypting it on demand via a GUI prompt the first
time a client requests a signature from it. That won't be a facility
available in all situations, so we have to be able to return failure
from the prompt.

More precisely, there are two versions of this API, one in
PageantClient and one in PageantListenerClient: the stream
implementation of PageantClient implements the former API and hands it
off to the latter. Windows Pageant has to directly implement both (but
they will end up funnelling to the same function within winpgnt.c).

NFC: for the moment, the new API functions are never called, and every
implementation of them returns failure.
This commit is contained in:
Simon Tatham
2020-01-20 21:22:33 +00:00
parent be30aac153
commit 08d5c233b3
4 changed files with 52 additions and 0 deletions
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10
pageant.c
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@ -1037,9 +1037,19 @@ static void pageant_conn_got_response(
}
}
static bool pageant_conn_ask_passphrase(
PageantClient *pc, PageantClientDialogId *dlgid, const char *msg)
{
struct pageant_conn_state *pcs =
container_of(pc, struct pageant_conn_state, pc);
return pageant_listener_client_ask_passphrase(pcs->plc, dlgid, msg);
}
static const struct PageantClientVtable pageant_connection_clientvt = {
pageant_conn_log,
pageant_conn_got_response,
pageant_conn_ask_passphrase,
};
static void pageant_conn_receive(