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gpg: Check gpg-agent version before 2.1 migration.

Browse source 
* g10/call-agent.c, g10/call-agent.h (agent_get_version): New.
* g10/migrate.c (migrate_secring): Abort migration if
agent_get_version returns not at least 2.1.0

--
GnuPG-bug-id: 1718

On the first installation of GnuPG 2.1 it is likely that an
old gpg-agent is still running in the environment. In that
case the migration would fail.

Signed-off-by: Andre Heinecke <aheinecke@intevation.de>
This commit is contained in:
Andre Heinecke 2014-09-19 19:38:13 +02:00 • committed by Werner Koch
parent 09a8f75f30
commit a6fcdbc9e0
3 changed files with 55 additions and 0 deletions
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30
g10/call-agent.c
View file

@ -2277,3 +2277,33 @@ agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc,
cache_nonce_status_cb, &cn_parm);
return err;
}
/* Return the version reported by gpg-agent. */
gpg_error_t
agent_get_version (ctrl_t ctrl, char **r_version)
{
gpg_error_t err;
membuf_t data;
err = start_agent (ctrl, 0);
if (err)
return err;
init_membuf (&data, 64);
err = assuan_transact (agent_ctx, "GETINFO version",
membuf_data_cb, &data,
NULL, NULL, NULL, NULL);
if (err)
{
xfree (get_membuf (&data, NULL));
*r_version = NULL;
}
else
{
put_membuf (&data, "", 1);
*r_version = get_membuf (&data, NULL);
if (!*r_version)
err = gpg_error_from_syserror ();
}
return err;
}