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agent: Slightly change structure of cmd_readkey.

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* agent/command.c (cmd_readkey): Avoid a leave label in the middle of
the code.  Remove the special return.
--

This helps to get better debug output.

The set_error macro which is used by parse_keygrip merely sets the
error code into the Assuan context.  It is thus no problem anymore to
call leave_cmd after having used set_error.  This might havve been
diffferent in the past.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2016-10-24 12:55:21 +02:00
parent 5e7dfd979d
commit fdb653a33e
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
1 changed files with 35 additions and 33 deletions
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68
agent/command.c
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@ -391,7 +391,9 @@ progress_cb (ctrl_t ctrl, const char *what, int printchar,
} }
/* Helper to print a message while leaving a command. */ /* Helper to print a message while leaving a command. Note that this
* function does not call assuan_set_error; the caller may do this
* prior to calling us. */
static gpg_error_t static gpg_error_t
leave_cmd (assuan_context_t ctx, gpg_error_t err) leave_cmd (assuan_context_t ctx, gpg_error_t err)
{ {
@ -1000,17 +1002,19 @@ cmd_readkey (assuan_context_t ctx, char *line)
unsigned char grip[20]; unsigned char grip[20];
gcry_sexp_t s_pkey = NULL; gcry_sexp_t s_pkey = NULL;
unsigned char *pkbuf = NULL; unsigned char *pkbuf = NULL;
char *serialno = NULL;
size_t pkbuflen; size_t pkbuflen;
const char *opt_card;
if (ctrl->restricted) if (ctrl->restricted)
return leave_cmd (ctx, gpg_error (GPG_ERR_FORBIDDEN)); return leave_cmd (ctx, gpg_error (GPG_ERR_FORBIDDEN));
if (has_option_name (line, "--card")) opt_card = has_option_name (line, "--card");
{ line = skip_options (line);
const char *keyid;
char *serialno = NULL;
keyid = skip_options (line); if (opt_card)
{
const char *keyid = opt_card;
rc = agent_card_getattr (ctrl, "SERIALNO", &serialno); rc = agent_card_getattr (ctrl, "SERIALNO", &serialno);
if (rc) if (rc)
@ -1042,35 +1046,33 @@ cmd_readkey (assuan_context_t ctx, char *line)
goto leave; goto leave;
rc = assuan_send_data (ctx, pkbuf, pkbuflen); rc = assuan_send_data (ctx, pkbuf, pkbuflen);
}
else
{
rc = parse_keygrip (ctx, line, grip);
if (rc)
goto leave;
rc = agent_public_key_from_file (ctrl, grip, &s_pkey);
if (!rc)
{
pkbuflen = gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, NULL, 0);
log_assert (pkbuflen);
pkbuf = xtrymalloc (pkbuflen);
if (!pkbuf)
rc = gpg_error_from_syserror ();
else
{
gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, pkbuf, pkbuflen);
rc = assuan_send_data (ctx, pkbuf, pkbuflen);
}
}
}
leave: leave:
xfree (serialno); xfree (serialno);
xfree (pkbuf); xfree (pkbuf);
gcry_sexp_release (s_pkey); gcry_sexp_release (s_pkey);
return leave_cmd (ctx, rc);
}
rc = parse_keygrip (ctx, line, grip);
if (rc)
return rc; /* Return immediately as this is already an Assuan error code.*/
rc = agent_public_key_from_file (ctrl, grip, &s_pkey);
if (!rc)
{
pkbuflen = gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, NULL, 0);
assert (pkbuflen);
pkbuf = xtrymalloc (pkbuflen);
if (!pkbuf)
rc = gpg_error_from_syserror ();
else
{
gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, pkbuf, pkbuflen);
rc = assuan_send_data (ctx, pkbuf, pkbuflen);
xfree (pkbuf);
}
gcry_sexp_release (s_pkey);
}
return leave_cmd (ctx, rc); return leave_cmd (ctx, rc);
} }