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Code Issues

Merge pull request #474 from christophgysin/swaylock_pam

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swaylock pam fixes
This commit is contained in:
Drew DeVault 2016-01-25 13:28:39 -05:00
commit bbd6c5be91
1 changed files with 33 additions and 9 deletions
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42
swaylock/main.c
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@ -36,18 +36,46 @@ void sway_terminate(void) {
}
char *password;
struct pam_response *pam_reply;
int function_conversation(int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr) {
const char* msg_style_names[] = {
NULL,
"PAM_PROMPT_ECHO_OFF",
"PAM_PROMPT_ECHO_ON",
"PAM_ERROR_MSG",
"PAM_TEXT_INFO",
};
/* PAM expects an array of responses, one for each message */
struct pam_response *pam_reply = calloc(num_msg, sizeof(struct pam_response));
*resp = pam_reply;
for(int i=0; i<num_msg; ++i) {
sway_log(L_DEBUG, "msg[%d]: (%s) %s", i,
msg_style_names[msg[i]->msg_style],
msg[i]->msg);
switch (msg[i]->msg_style) {
case PAM_PROMPT_ECHO_OFF:
case PAM_PROMPT_ECHO_ON:
pam_reply[i].resp = password;
break;
case PAM_ERROR_MSG:
case PAM_TEXT_INFO:
break;
}
}
return PAM_SUCCESS;
}
/**
* password will be zeroed out.
*/
bool verify_password(char *password) {
bool verify_password() {
struct passwd *passwd = getpwuid(getuid());
char *username = passwd->pw_name;
@ -57,18 +85,12 @@ bool verify_password(char *password) {
if ((pam_err = pam_start("swaylock", username, &local_conversation, &local_auth_handle)) != PAM_SUCCESS) {
sway_abort("PAM returned %d\n", pam_err);
}
pam_reply = (struct pam_response *)malloc(sizeof(struct pam_response));
pam_reply[0].resp = password;
pam_reply[0].resp_retcode = 0;
if ((pam_err = pam_authenticate(local_auth_handle, 0)) != PAM_SUCCESS) {
memset(password, 0, strlen(password));
return false;
}
if ((pam_err = pam_end(local_auth_handle, pam_err)) != PAM_SUCCESS) {
memset(password, 0, strlen(password));
return false;
}
memset(password, 0, strlen(password));
return true;
}
@ -76,9 +98,11 @@ void notify_key(enum wl_keyboard_key_state state, xkb_keysym_t sym, uint32_t cod
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
switch (sym) {
case XKB_KEY_Return:
if (verify_password(password)) {
if (verify_password()) {
exit(0);
}
password = malloc(1024); // TODO: Let this grow
password[0] = '\0';
break;
default:
{