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agent: Fix cancellation handling for scdaemon.

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* agent/call-scd.c (cancel_inquire): Remove.
(agent_card_pksign, agent_card_pkdecrypt, agent_card_writekey)
(agent_card_scd): Don't call cancel_inquire.

--

Cherry-picked master commit of:
	9f5e50e7c85aa8b847d38010241ed570ac114fc3

Since libassuan 2.1.0, cancellation command "CAN" is handled within
the library, by assuan_transact.  So, cancel_inquire just caused
spurious "CAN" command to scdaemon which resulted an error.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-09-20 10:42:28 +09:00
parent 90e5f49b6a
commit 005e951714
1 changed files with 0 additions and 41 deletions
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41
agent/call-scd.c
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@ -89,7 +89,6 @@ struct inq_needpin_parm_s
const char *getpin_cb_desc;
assuan_context_t passthru; /* If not NULL, pass unknown inquiries
up to the caller. */
int any_inq_seen;
/* The next fields are used by inq_writekey_parm. */
const unsigned char *keydata;
@ -727,7 +726,6 @@ inq_needpin (void *opaque, const char *line)
size_t pinlen;
int rc;
parm->any_inq_seen = 1;
if ((s = has_leading_keyword (line, "NEEDPIN")))
{
line = s;
@ -811,30 +809,6 @@ hash_algo_option (int algo)
}
static gpg_error_t
cancel_inquire (ctrl_t ctrl, gpg_error_t rc)
{
gpg_error_t oldrc = rc;
/* The inquire callback was called and transact returned a
cancel error. We assume that the inquired process sent a
CANCEL. The passthrough code is not able to pass on the
CANCEL and thus scdaemon would stuck on this. As a
workaround we send a CANCEL now. */
rc = assuan_write_line (ctrl->scd_local->ctx, "CAN");
if (!rc) {
char *line;
size_t len;
rc = assuan_read_line (ctrl->scd_local->ctx, &line, &len);
if (!rc)
rc = oldrc;
}
return rc;
}
/* Create a signature using the current card. MDALGO is either 0 or
* gives the digest algorithm. DESC_TEXT is an additional parameter
* passed to GETPIN_CB. */
@ -875,7 +849,6 @@ agent_card_pksign (ctrl_t ctrl,
inqparm.getpin_cb_arg = getpin_cb_arg;
inqparm.getpin_cb_desc = desc_text;
inqparm.passthru = 0;
inqparm.any_inq_seen = 0;
inqparm.keydata = NULL;
inqparm.keydatalen = 0;
@ -888,9 +861,6 @@ agent_card_pksign (ctrl_t ctrl,
put_membuf_cb, &data,
inq_needpin, &inqparm,
NULL, NULL);
if (inqparm.any_inq_seen && (gpg_err_code(rc) == GPG_ERR_CANCELED ||
gpg_err_code(rc) == GPG_ERR_ASS_CANCELED))
rc = cancel_inquire (ctrl, rc);
if (rc)
{
@ -974,7 +944,6 @@ agent_card_pkdecrypt (ctrl_t ctrl,
inqparm.getpin_cb_arg = getpin_cb_arg;
inqparm.getpin_cb_desc = desc_text;
inqparm.passthru = 0;
inqparm.any_inq_seen = 0;
inqparm.keydata = NULL;
inqparm.keydatalen = 0;
snprintf (line, DIM(line), "PKDECRYPT %s", keyid);
@ -982,9 +951,6 @@ agent_card_pkdecrypt (ctrl_t ctrl,
put_membuf_cb, &data,
inq_needpin, &inqparm,
padding_info_cb, r_padding);
if (inqparm.any_inq_seen && (gpg_err_code(rc) == GPG_ERR_CANCELED ||
gpg_err_code(rc) == GPG_ERR_ASS_CANCELED))
rc = cancel_inquire (ctrl, rc);
if (rc)
{
@ -1111,15 +1077,11 @@ agent_card_writekey (ctrl_t ctrl, int force, const char *serialno,
parms.getpin_cb_arg = getpin_cb_arg;
parms.getpin_cb_desc= NULL;
parms.passthru = 0;
parms.any_inq_seen = 0;
parms.keydata = keydata;
parms.keydatalen = keydatalen;
rc = assuan_transact (ctrl->scd_local->ctx, line, NULL, NULL,
inq_writekey_parms, &parms, NULL, NULL);
if (parms.any_inq_seen && (gpg_err_code(rc) == GPG_ERR_CANCELED ||
gpg_err_code(rc) == GPG_ERR_ASS_CANCELED))
rc = cancel_inquire (ctrl, rc);
return unlock_scd (ctrl, rc);
}
@ -1344,7 +1306,6 @@ agent_card_scd (ctrl_t ctrl, const char *cmdline,
inqparm.getpin_cb_arg = getpin_cb_arg;
inqparm.getpin_cb_desc = NULL;
inqparm.passthru = assuan_context;
inqparm.any_inq_seen = 0;
inqparm.keydata = NULL;
inqparm.keydatalen = 0;
@ -1354,8 +1315,6 @@ agent_card_scd (ctrl_t ctrl, const char *cmdline,
pass_data_thru, assuan_context,
inq_needpin, &inqparm,
pass_status_thru, assuan_context);
if (inqparm.any_inq_seen && gpg_err_code(rc) == GPG_ERR_ASS_CANCELED)
rc = cancel_inquire (ctrl, rc);
assuan_set_flag (ctrl->scd_local->ctx, ASSUAN_CONVEY_COMMENTS, saveflag);
if (rc)