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Move (unfinished) authentication code into separate function

This commit is contained in:
Brendan Shanks 2017-08-08 23:39:22 -07:00
parent ca060c253d
commit 19717f0105
1 changed files with 39 additions and 35 deletions
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74
macssh/source/ssh/ssh2.c
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@ -1446,6 +1446,43 @@ static void kbd_callback(const char* name, int name_len, const char* instruction
*/
}
static Boolean ssh2_authentication_successful(LIBSSH2_SESSION *session, WindRec *w)
{
Str255 username;
char *userauthlist;
memcpy(username, &(w->sshdata.login[1]), w->sshdata.login[0]);
username[w->sshdata.login[0]] = '\0';
userauthlist = libssh2_userauth_list(session, username, w->sshdata.login[0]);
if (userauthlist == NULL) {
if (libssh2_userauth_authenticated(session)) {
syslog(0, "\'none\' userauth succeeded\n");
return true;
} else {
syslog(0, "Failed to retrieve authentication methods\n");
return false;
}
} else {
syslog( 0, "Authentication methods: %s\n", userauthlist);
}
// TODO: public key
if (strstr(userauthlist, "keyboard-interactive") != NULL) {
if (libssh2_userauth_keyboard_interactive_ex(session, &(w->sshdata.login[1]), w->sshdata.login[0], kbd_callback) == 0)
return true;
}
if (strstr(userauthlist, "password") != NULL) {
//SSH2LoginDialog(theScreen->sshdata.host, theScreen->sshdata.login, theScreen->sshdata.password);
// TODO: add pwd change callback
if (libssh2_userauth_password_ex(session, &(w->sshdata.login[1]), w->sshdata.login[0], &(w->sshdata.password[1]), w->sshdata.password[0], NULL) == 0)
return true;
// TODO: allow re-entering password on LIBSSH2_ERROR_AUTHENTICATION_FAILED
}
syslog( 0, "No supported authentication method found\n");
return false;
}
/*
* ssh2_thread
*/
@ -1500,42 +1537,9 @@ void *ssh2_thread(WindRec*w)
if (!ssh2_hostkey_approved(session))
goto closesession;
{
Str255 username;
char *userauthlist;
memcpy(username, &(w->sshdata.login[1]), w->sshdata.login[0]);
username[w->sshdata.login[0]] = '\0';
userauthlist = libssh2_userauth_list(session, username, w->sshdata.login[0]);
if (userauthlist == NULL) {
if (libssh2_userauth_authenticated(session)) {
syslog(0, "\'none\' userauth succeeded\n");
goto success;
} else {
syslog(0, "Failed to retrieve authentication methods\n");
goto closesession;
}
} else {
syslog( 0, "Authentication methods: %s\n", userauthlist);
}
// TODO: public key
if (strstr(userauthlist, "keyboard-interactive") != NULL) {
if (libssh2_userauth_keyboard_interactive_ex(session, &(w->sshdata.login[1]), w->sshdata.login[0], kbd_callback) == 0)
goto success;
}
if (strstr(userauthlist, "password") != NULL) {
//SSH2LoginDialog(theScreen->sshdata.host, theScreen->sshdata.login, theScreen->sshdata.password);
// TODO: add pwd change callback
if (libssh2_userauth_password_ex(session, &(w->sshdata.login[1]), w->sshdata.login[0], &(w->sshdata.password[1]), w->sshdata.password[0], NULL) == 0)
goto success;
// TODO: allow re-entering password on LIBSSH2_ERROR_AUTHENTICATION_FAILED
}
syslog( 0, "No supported authentication method found\n");
if (!ssh2_authentication_successful(session, w))
goto closesession;
}
success:
{
LIBSSH2_CHANNEL *channel = libssh2_channel_open_session(session);
libssh2_channel_request_pty(channel, "vt100");