static KbdintAuthctxt *
kbdint_alloc(const char *devs)
{
KbdintAuthctxt *kbdintctxt;
Buffer b;
int i;
kbdintctxt = xcalloc(1, sizeof(KbdintAuthctxt));
if (strcmp(devs, "") == 0) {
buffer_init(&b);
for (i = 0; devices[i]; i++) {
if (buffer_len(&b) > 0)
buffer_append(&b, ",", 1);
buffer_append(&b, devices[i]->name,
strlen(devices[i]->name));
}
if ((kbdintctxt->devices = sshbuf_dup_string(&b)) == NULL)
fatal("%s: sshbuf_dup_string failed", __func__);
buffer_free(&b);
} else {
kbdintctxt->devices = xstrdup(devs);
}
debug("kbdint_alloc: devices '%s'", kbdintctxt->devices);
kbdintctxt->ctxt = NULL;
kbdintctxt->device = NULL;
kbdintctxt->nreq = 0;
return kbdintctxt;
}
static char *
authmethods_get(Authctxt *authctxt)
{
Buffer b;
char *list;
u_int i;
buffer_init(&b);
for (i = 0; authmethods[i] != NULL; i++) {
if (strcmp(authmethods[i]->name, "none") == 0)
continue;
if (authmethods[i]->enabled == NULL ||
*(authmethods[i]->enabled) == 0)
continue;
if (!auth2_method_allowed(authctxt, authmethods[i]->name,
NULL))
continue;
if (buffer_len(&b) > 0)
buffer_append(&b, ",", 1);
buffer_append(&b, authmethods[i]->name,
strlen(authmethods[i]->name));
}
if ((list = sshbuf_dup_string(&b)) == NULL)
fatal("%s: sshbuf_dup_string failed", __func__);
buffer_free(&b);
return list;
}
static char *
authmethods_get(Authctxt *authctxt)
{
struct sshbuf *b;
char *list;
int i, r;
if ((b = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
for (i = 0; authmethods[i] != NULL; i++) {
if (strcmp(authmethods[i]->name, "none") == 0)
continue;
if (authmethods[i]->enabled == NULL ||
*(authmethods[i]->enabled) == 0)
continue;
if (!auth2_method_allowed(authctxt, authmethods[i]->name,
NULL))
continue;
if ((r = sshbuf_putf(b, "%s%s", sshbuf_len(b) ? "," : "",
authmethods[i]->name)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
}
if ((list = sshbuf_dup_string(b)) == NULL)
fatal("%s: sshbuf_dup_string failed", __func__);
sshbuf_free(b);
return list;
}
static void
expose_authinfo(const char *caller)
{
char *auth_info;
/*
* Expose authentication information to PAM.
* The environment variable is versioned. Please increment the
* version suffix if the format of session_info changes.
*/
if (sshpam_authctxt->session_info == NULL)
auth_info = xstrdup("");
else if ((auth_info = sshbuf_dup_string(
sshpam_authctxt->session_info)) == NULL)
fatal("%s: sshbuf_dup_string failed", __func__);
debug2("%s: auth information in SSH_AUTH_INFO_0", caller);
do_pam_putenv("SSH_AUTH_INFO_0", auth_info);
free(auth_info);
}