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Loading user profile during authentication

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This commit is contained in:
Manoj Ampalam 2016-09-15 22:50:56 -07:00
parent 45809a6bf7
commit 3266df9a29
2 changed files with 171 additions and 187 deletions
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229
auth-passwd.c
View File

@ -41,13 +41,13 @@
#include "xmalloc.h"
#endif
/*
* We support only client side kerberos on Windows.
*/
/*
* We support only client side kerberos on Windows.
*/
#ifdef WIN32_FIXME
#undef GSSAPI
#undef KRB5
#undef GSSAPI
#undef KRB5
#endif
#include <sys/types.h>
@ -155,23 +155,23 @@ warn_expiry(Authctxt *authctxt, auth_session_t *as)
#ifdef HAVE_LOGIN_CAP
if (authctxt->valid) {
pwwarntime = login_getcaptime(lc, "password-warn", TWO_WEEKS,
TWO_WEEKS);
TWO_WEEKS);
acwarntime = login_getcaptime(lc, "expire-warn", TWO_WEEKS,
TWO_WEEKS);
TWO_WEEKS);
}
#endif
if (pwtimeleft != 0 && pwtimeleft < pwwarntime) {
daysleft = pwtimeleft / DAY + 1;
snprintf(buf, sizeof(buf),
"Your password will expire in %lld day%s.\n",
daysleft, daysleft == 1 ? "" : "s");
"Your password will expire in %lld day%s.\n",
daysleft, daysleft == 1 ? "" : "s");
buffer_append(&loginmsg, buf, strlen(buf));
}
if (actimeleft != 0 && actimeleft < acwarntime) {
daysleft = actimeleft / DAY + 1;
snprintf(buf, sizeof(buf),
"Your account will expire in %lld day%s.\n",
daysleft, daysleft == 1 ? "" : "s");
"Your account will expire in %lld day%s.\n",
daysleft, daysleft == 1 ? "" : "s");
buffer_append(&loginmsg, buf, strlen(buf));
}
}
@ -184,7 +184,7 @@ sys_auth_passwd(Authctxt *authctxt, const char *password)
static int expire_checked = 0;
as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
(char *)password);
(char *)password);
if (as == NULL)
return (0);
if (auth_getstate(as) & AUTH_PWEXPIRED) {
@ -192,7 +192,8 @@ sys_auth_passwd(Authctxt *authctxt, const char *password)
disable_forwarding();
authctxt->force_pwchange = 1;
return (1);
} else {
}
else {
if (!expire_checked) {
expire_checked = 1;
warn_expiry(authctxt, as);
@ -202,183 +203,43 @@ sys_auth_passwd(Authctxt *authctxt, const char *password)
}
#elif defined(WIN32_FIXME)
extern int auth_sock;
int sys_auth_passwd(Authctxt *authctxt, const char *password)
{
/*
* Authenticate on Windows
*/
struct passwd *pw = authctxt -> pw;
/*
* Authenticate on Windows
*/
HANDLE hToken = INVALID_HANDLE_VALUE;
BOOL worked = FALSE;
LPWSTR user_UTF16 = NULL;
LPWSTR password_UTF16 = NULL;
LPWSTR domain_UTF16 = NULL;
{
u_char *blob = NULL;
size_t blen = 0;
DWORD token = 0;
struct sshbuf *msg = NULL;
int buffer_size = 0;
/*
* Identify domain or local login.
*/
msg = sshbuf_new();
if (!msg)
return 0;
if (sshbuf_put_u8(msg, 100) != 0 ||
sshbuf_put_cstring(msg, "password") != 0 ||
sshbuf_put_cstring(msg, authctxt->user) != 0 ||
sshbuf_put_cstring(msg, password) != 0 ||
ssh_request_reply(auth_sock, msg, msg) != 0 ||
sshbuf_get_u32(msg, &token) != 0) {
debug("auth agent did not authorize client %s", authctxt->pw->pw_name);
return 0;
}
char *username = authctxt->user;
char *domainslash = strchr(authctxt->user, '\\');
if (domainslash) {
// domain\username format
char *domainname = authctxt->user;
*domainslash = '\0';
username = ++domainslash; // username is past the domain \ is the username
if (blob)
free(blob);
if (msg)
sshbuf_free(msg);
// Convert domainname from UTF-8 to UTF-16
buffer_size = MultiByteToWideChar(CP_UTF8, 0, domainname, -1, NULL, 0);
authctxt->methoddata = token;
}
if (buffer_size > 0)
{
domain_UTF16 = xmalloc(4 * buffer_size);
}
else
{
return 0;
}
if (0 == MultiByteToWideChar(CP_UTF8, 0, domainname,
-1, domain_UTF16, buffer_size))
{
free(domain_UTF16);
return 0;
}
}
else if (domainslash = strchr(authctxt->user, '@')) {
// username@domain format
username = authctxt->user;
*domainslash = '\0';
char *domainname = ++domainslash; // domainname is past the user@
// Convert domainname from UTF-8 to UTF-16
buffer_size = MultiByteToWideChar(CP_UTF8, 0, domainname, -1, NULL, 0);
if (buffer_size > 0)
{
domain_UTF16 = xmalloc(4 * buffer_size);
}
else
{
return 0;
}
if (0 == MultiByteToWideChar(CP_UTF8, 0, domainname,
-1, domain_UTF16, buffer_size))
{
free(domain_UTF16);
return 0;
}
}
else {
domain_UTF16 = strchr(authctxt->user, '@') ? NULL : L".";
}
authctxt -> methoddata = hToken;
if (domain_UTF16 == NULL)
{
debug3("Using domain logon...");
}
/*
* Convert username from UTF-8 to UTF-16
*/
buffer_size = MultiByteToWideChar(CP_UTF8, 0, username, -1, NULL, 0);
if (buffer_size > 0)
{
user_UTF16 = xmalloc(4 * buffer_size);
}
else
{
return 0;
}
if (0 == MultiByteToWideChar(CP_UTF8, 0, username,
-1, user_UTF16, buffer_size))
{
free(user_UTF16);
return 0;
}
/*
* Convert password from UTF-8 to UTF-16
*/
buffer_size = MultiByteToWideChar(CP_UTF8, 0, password, -1, NULL, 0);
if (buffer_size > 0)
{
password_UTF16 = xmalloc(4 * buffer_size);
}
else
{
return 0;
}
if (0 == MultiByteToWideChar(CP_UTF8, 0, password, -1,
password_UTF16 , buffer_size))
{
free(password_UTF16 );
return 0;
}
worked = LogonUserW(user_UTF16, domain_UTF16, password_UTF16,
LOGON32_LOGON_NETWORK,
LOGON32_PROVIDER_DEFAULT, &hToken);
free(user_UTF16);
free(password_UTF16);
if (domainslash) free(domain_UTF16);
/*
* If login still fails, go out.
*/
if (!worked || hToken == INVALID_HANDLE_VALUE)
{
return 0;
}
/*
* Make sure this can be inherited for when
* we start shells or commands.
*/
worked = SetHandleInformation(hToken, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
if (!worked)
{
CloseHandle(hToken);
hToken = INVALID_HANDLE_VALUE;
authctxt -> methoddata = hToken;
return 0;
}
/*
* Save the handle (or invalid handle) as method-specific data.
*/
authctxt -> methoddata = hToken;
return 1;
return 1;
}
#elif !defined(CUSTOM_SYS_AUTH_PASSWD)
@ -397,13 +258,13 @@ sys_auth_passwd(Authctxt *authctxt, const char *password)
/* Encrypt the candidate password using the proper salt. */
encrypted_password = xcrypt(password,
(pw_password[0] && pw_password[1]) ? pw_password : "xx");
(pw_password[0] && pw_password[1]) ? pw_password : "xx");
/*
* Authentication is accepted if the encrypted passwords
* are identical.
*/
return encrypted_password != NULL &&
strcmp(encrypted_password, pw_password) == 0;
strcmp(encrypted_password, pw_password) == 0;
}
#endif

129
contrib/win32/win32compat/ssh-agent/authagent-request.c
View File

@ -31,6 +31,7 @@
#define UMDF_USING_NTSTATUS
#include <Windows.h>
#include <UserEnv.h>
#include <Ntsecapi.h>
#include <ntstatus.h>
#include <Shlobj.h>
@ -50,6 +51,53 @@ InitLsaString(LSA_STRING *lsa_string, const char *str)
}
}
static void
EnablePrivilege(const char *privName, int enabled)
{
TOKEN_PRIVILEGES tp;
HANDLE hProcToken = NULL;
LUID luid;
int exitCode = 1;
if (LookupPrivilegeValueA(NULL, privName, &luid) == FALSE ||
OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &hProcToken) == FALSE)
goto done;
tp.PrivilegeCount = 1;
tp.Privileges[0].Luid = luid;
tp.Privileges[0].Attributes = enabled ? SE_PRIVILEGE_ENABLED : 0;
AdjustTokenPrivileges(hProcToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES), NULL, NULL);
done:
if (hProcToken)
CloseHandle(hProcToken);
return;
}
void
LoadProfile(HANDLE token, char* user, char* domain) {
PROFILEINFOA profileInfo;
profileInfo.dwFlags = PI_NOUI;
profileInfo.lpProfilePath = NULL;
profileInfo.lpUserName = user;
profileInfo.lpDefaultPath = NULL;
profileInfo.lpServerName = domain;
profileInfo.lpPolicyPath = NULL;
profileInfo.hProfile = NULL;
profileInfo.dwSize = sizeof(profileInfo);
EnablePrivilege("SeBackupPrivilege", 1);
EnablePrivilege("SeRestorePrivilege", 1);
if (LoadUserProfileA(token, &profileInfo) == FALSE)
debug("Loading user profile failed ERROR: %d", GetLastError());
EnablePrivilege("SeBackupPrivilege", 0);
EnablePrivilege("SeRestorePrivilege", 0);
}
#define MAX_USER_LEN 256
static HANDLE
generate_user_token(wchar_t* user) {
@ -167,9 +215,67 @@ done:
return token;
}
#define AUTH_REQUEST "pubkey"
#define PUBKEY_AUTH_REQUEST "pubkey"
#define PASSWD_AUTH_REQUEST "password"
#define MAX_USER_NAME_LEN 256
int process_passwordauth_request(struct sshbuf* request, struct sshbuf* response, struct agent_connection* con) {
char *user = NULL, *pwd = NULL, *dom = NULL, *tmp;
//wchar_t *userW = NULL, *domW = NULL, *pwdW = NULL;
size_t user_len = 0, pwd_len = 0, dom_len = 0;
int r = -1;
HANDLE token = 0, dup_token, client_proc = 0;
ULONG client_pid;
if (sshbuf_get_cstring(request, &user, &user_len) != 0 ||
sshbuf_get_cstring(request, &pwd, &pwd_len) != 0 ||
user_len == 0 ||
pwd_len == 0 ){
debug("bad password auth request");
goto done;
}
/*TODO - support Unicode*/
if ((tmp = strchr(user, '\\')) != NULL) {
dom = user;
user = tmp + 1;
*tmp = '\0';
}
else if ((tmp = strchr(user, '@')) != NULL) {
dom = tmp + 1;
*tmp = '\0';
}
if (LogonUser(user, dom, pwd, LOGON32_LOGON_NETWORK, LOGON32_PROVIDER_DEFAULT, &token) == FALSE ||
(FALSE == GetNamedPipeClientProcessId(con->connection, &client_pid)) ||
((client_proc = OpenProcess(PROCESS_DUP_HANDLE, FALSE, client_pid)) == NULL) ||
(FALSE == DuplicateHandle(GetCurrentProcess(), token, client_proc, &dup_token, TOKEN_QUERY | TOKEN_IMPERSONATE, FALSE, DUPLICATE_SAME_ACCESS)) ||
(sshbuf_put_u32(response, dup_token) != 0)) {
debug("failed to authenticate user");
goto done;
}
LoadProfile(token, user, dom);
r = 0;
done:
/* TODO Fix this hacky protocol*/
if ((r == -1) && (sshbuf_put_u8(response, SSH_AGENT_FAILURE) == 0))
r = 0;
if (user)
free(user);
if (pwd)
free(pwd);
if (token)
CloseHandle(token);
if (client_proc)
CloseHandle(client_proc);
return r;
}
int process_pubkeyauth_request(struct sshbuf* request, struct sshbuf* response, struct agent_connection* con) {
int r = -1;
char *key_blob, *user, *sig, *blob;
@ -214,7 +320,22 @@ int process_pubkeyauth_request(struct sshbuf* request, struct sshbuf* response,
debug("failed to authorize user");
goto done;
}
{
/*TODO - support Unicode*/
char *tmp, *u = user, *d = NULL;
if ((tmp = strchr(user, '\\')) != NULL) {
d = user;
u = tmp + 1;
*tmp = '\0';
}
else if ((tmp = strchr(user, '@')) != NULL) {
d = tmp + 1;
*tmp = '\0';
}
LoadProfile(token, u, d);
}
r = 0;
done:
if (user)
@ -238,8 +359,10 @@ int process_authagent_request(struct sshbuf* request, struct sshbuf* response, s
return -1;
}
if (opn_len == strlen(AUTH_REQUEST) && memcmp(opn, AUTH_REQUEST, opn_len) == 0)
if (opn_len == strlen(PUBKEY_AUTH_REQUEST) && memcmp(opn, PUBKEY_AUTH_REQUEST, opn_len) == 0)
return process_pubkeyauth_request(request, response, con);
else if (opn_len == strlen(PASSWD_AUTH_REQUEST) && memcmp(opn, PASSWD_AUTH_REQUEST, opn_len) == 0)
return process_passwordauth_request(request, response, con);
else {
debug("unknown auth request: %s", opn);
return -1;