Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
- Copyright (C) Andrew Bartlett 2001-2002
+ Copyright (C) Andrew Bartlett 2001-2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+/* These comments regard the code to change the user's unix password: */
+
/* fork a child process to exec passwd and write to its
* tty to change a users password. This is running as the
* user who is attempting to change the password.
* was included as a client to change passwords using the 'passwd' program
* on the remote machine.
*
- * This routine is called by set_user_password() in password.c only if ALLOW_PASSWORD_CHANGE
- * is defined in the compiler directives located in the Makefile.
- *
* This code has been hacked by Bob Nance (nance@niehs.nih.gov) and Evan Patterson
* (patters2@niehs.nih.gov) at the National Institute of Environmental Health Sciences
* and rights to modify, distribute or incorporate this change to the CAP suite or
extern struct passdb_ops pdb_ops;
static NTSTATUS check_oem_password(const char *user,
- uchar * lmdata, const uchar * lmhash,
- const uchar * ntdata, const uchar * nthash,
- SAM_ACCOUNT **hnd, char *new_passwd,
- int new_passwd_size);
+ uchar password_encrypted_with_lm_hash[516],
+ const uchar old_lm_hash_encrypted[16],
+ uchar password_encrypted_with_nt_hash[516],
+ const uchar old_nt_hash_encrypted[16],
+ struct samu **hnd, char *new_passwd,
+ int new_passwd_size);
#if ALLOW_CHANGE_PASSWORD
{
int master;
static fstring line;
- DIR *dirp;
+ SMB_STRUCT_DIR *dirp;
const char *dpname;
#if defined(HAVE_GRANTPT)
fstrcpy(line, "/dev/ptyXX");
- dirp = opendir("/dev");
+ dirp = sys_opendir("/dev");
if (!dirp)
return (-1);
while ((dpname = readdirname(dirp)) != NULL)
DEBUG(3, ("pty: opened %s\n", line));
line[5] = 't';
*slave = line;
- closedir(dirp);
+ sys_closedir(dirp);
return (master);
}
}
}
- closedir(dirp);
+ sys_closedir(dirp);
return (-1);
}
DEBUG(3, ("More weirdness, could not open %s\n", slavedev));
return (False);
}
-#ifdef I_PUSH
- ioctl(slave, I_PUSH, "ptem");
- ioctl(slave, I_PUSH, "ldterm");
+#if defined(I_PUSH) && defined(I_FIND)
+ if (ioctl(slave, I_FIND, "ptem") == 0) {
+ ioctl(slave, I_PUSH, "ptem");
+ }
+ if (ioctl(slave, I_FIND, "ldterm") == 0) {
+ ioctl(slave, I_PUSH, "ldterm");
+ }
#elif defined(TIOCSCTTY)
if (ioctl(slave, TIOCSCTTY, 0) < 0)
{
if (lp_passwd_chat_debug())
DEBUG(100, ("expect: sending [%s]\n", issue));
- if ((len = write(master, issue, strlen(issue))) != strlen(issue)) {
+ if ((len = sys_write(master, issue, strlen(issue))) != strlen(issue)) {
DEBUG(2,("expect: (short) write returned %d\n", len ));
return False;
}
if (strequal(expected, "."))
return True;
- timeout = 2000;
+ /* Initial timeout. */
+ timeout = lp_passwd_chat_timeout() * 1000;
nread = 0;
buffer[nread] = 0;
pstrcpy( str, buffer);
trim_char( str, ' ', ' ');
- if ((match = (unix_wild_match(expected, str) == 0)))
- timeout = 200;
+ if ((match = unix_wild_match(expected, str)) == True) {
+ /* Now data has started to return, lower timeout. */
+ timeout = lp_passwd_chat_timeout() * 100;
+ }
}
}
return (count > 0);
}
-static BOOL chat_with_program(char *passwordprogram, struct passwd *pass,
+static BOOL chat_with_program(char *passwordprogram, const struct passwd *pass,
char *chatsequence, BOOL as_root)
{
char *slavedev;
/* allocate a pseudo-terminal device */
if ((master = findpty(&slavedev)) < 0) {
- DEBUG(3, ("Cannot Allocate pty for password change: %s\n", pass->pw_name));
+ DEBUG(3, ("chat_with_program: Cannot Allocate pty for password change: %s\n", pass->pw_name));
return (False);
}
CatchChildLeaveStatus();
if ((pid = sys_fork()) < 0) {
- DEBUG(3, ("Cannot fork() child for password change: %s\n", pass->pw_name));
+ DEBUG(3, ("chat_with_program: Cannot fork() child for password change: %s\n", pass->pw_name));
close(master);
CatchChild();
return (False);
/* we now have a pty */
if (pid > 0) { /* This is the parent process */
if ((chstat = talktochild(master, chatsequence)) == False) {
- DEBUG(3, ("Child failed to change password: %s\n", pass->pw_name));
+ DEBUG(3, ("chat_with_program: Child failed to change password: %s\n", pass->pw_name));
kill(pid, SIGKILL); /* be sure to end this process */
}
}
if (wpid < 0) {
- DEBUG(3, ("The process is no longer waiting!\n\n"));
+ DEBUG(3, ("chat_with_program: The process is no longer waiting!\n\n"));
close(master);
CatchChild();
return (False);
close(master);
if (pid != wpid) {
- DEBUG(3, ("We were waiting for the wrong process ID\n"));
+ DEBUG(3, ("chat_with_program: We were waiting for the wrong process ID\n"));
return (False);
}
- if (WIFEXITED(wstat) == 0) {
- DEBUG(3, ("The process exited while we were waiting\n"));
+ if (WIFEXITED(wstat) && (WEXITSTATUS(wstat) != 0)) {
+ DEBUG(3, ("chat_with_program: The process exited with status %d \
+while we were waiting\n", WEXITSTATUS(wstat)));
return (False);
}
- if (WEXITSTATUS(wstat) != 0) {
- DEBUG(3, ("The status of the process exiting was %d\n",
- wstat));
+#if defined(WIFSIGNALLED) && defined(WTERMSIG)
+ else if (WIFSIGNALLED(wstat)) {
+ DEBUG(3, ("chat_with_program: The process was killed by signal %d \
+while we were waiting\n", WTERMSIG(wstat)));
return (False);
}
-
+#endif
} else {
/* CHILD */
/*
- * Lose any oplock capabilities.
+ * Lose any elevated privileges.
*/
- oplock_set_capability(False, False);
+ drop_effective_capability(KERNEL_OPLOCK_CAPABILITY);
+ drop_effective_capability(DMAPI_ACCESS_CAPABILITY);
/* make sure it doesn't freeze */
alarm(20);
if (as_root)
become_root();
- DEBUG(3, ("Dochild for user %s (uid=%d,gid=%d) (as_root = %s)\n", pass->pw_name,
+ DEBUG(3, ("chat_with_program: Dochild for user %s (uid=%d,gid=%d) (as_root = %s)\n", pass->pw_name,
(int)getuid(), (int)getgid(), BOOLSTR(as_root) ));
chstat = dochild(master, slavedev, pass, passwordprogram, as_root);
}
if (chstat)
- DEBUG(3, ("Password change %ssuccessful for user %s\n",
+ DEBUG(3, ("chat_with_program: Password change %ssuccessful for user %s\n",
(chstat ? "" : "un"), pass->pw_name));
return (chstat);
}
-BOOL chgpasswd(const char *name, const char *oldpass, const char *newpass, BOOL as_root)
+BOOL chgpasswd(const char *name, const struct passwd *pass,
+ const char *oldpass, const char *newpass, BOOL as_root)
{
pstring passwordprogram;
pstring chatsequence;
size_t i;
size_t len;
- struct passwd *pass;
-
- if (!name) {
- DEBUG(1, ("NULL username specfied to chgpasswd()!\n"));
- }
-
- pass = Get_Pwnam(name);
- if (!pass) {
- DEBUG(1, ("Username does not exist in system passwd!\n"));
- return False;
- }
-
if (!oldpass) {
oldpass = "";
}
- DEBUG(3, ("Password change (as_root=%s) for user: %s\n", BOOLSTR(as_root), name));
+ DEBUG(3, ("chgpasswd: Password change (as_root=%s) for user: %s\n", BOOLSTR(as_root), name));
-#if DEBUG_PASSWORD
- DEBUG(100, ("Passwords: old=%s new=%s\n", oldpass, newpass));
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("chgpasswd: Passwords: old=%s new=%s\n", oldpass, newpass));
#endif
/* Take the passed information and test it for minimum criteria */
- /* Minimum password length */
- if (strlen(newpass) < lp_min_passwd_length()) {
- /* too short, must be at least MINPASSWDLENGTH */
- DEBUG(0, ("Password Change: user %s, New password is shorter than minimum password length = %d\n",
- name, lp_min_passwd_length()));
- return (False); /* inform the user */
- }
/* Password is same as old password */
if (strcmp(oldpass, newpass) == 0) {
/* don't allow same password */
- DEBUG(2, ("Password Change: %s, New password is same as old\n", name)); /* log the attempt */
+ DEBUG(2, ("chgpasswd: Password Change: %s, New password is same as old\n", name)); /* log the attempt */
return (False); /* inform the user */
}
len = strlen(oldpass);
for (i = 0; i < len; i++) {
if (iscntrl((int)oldpass[i])) {
- DEBUG(0, ("chat_with_program: oldpass contains control characters (disallowed).\n"));
+ DEBUG(0, ("chgpasswd: oldpass contains control characters (disallowed).\n"));
return False;
}
}
len = strlen(newpass);
for (i = 0; i < len; i++) {
if (iscntrl((int)newpass[i])) {
- DEBUG(0, ("chat_with_program: newpass contains control characters (disallowed).\n"));
+ DEBUG(0, ("chgpasswd: newpass contains control characters (disallowed).\n"));
return False;
}
}
if (as_root) {
/* The password program *must* contain the user name to work. Fail if not. */
- if (strstr(passwordprogram, "%u") == NULL) {
+ if (strstr_m(passwordprogram, "%u") == NULL) {
DEBUG(0,("chgpasswd: Running as root the 'passwd program' parameter *MUST* contain \
the string %%u, and the given string %s does not.\n", passwordprogram ));
return False;
#else /* ALLOW_CHANGE_PASSWORD */
-BOOL chgpasswd(const char *name, const char *oldpass, const char *newpass, BOOL as_root)
+BOOL chgpasswd(const char *name, const struct passwd *pass,
+ const char *oldpass, const char *newpass, BOOL as_root)
{
- DEBUG(0, ("Password changing not compiled in (user=%s)\n", name));
+ DEBUG(0, ("chgpasswd: Unix Password changing not compiled in (user=%s)\n", name));
return (False);
}
#endif /* ALLOW_CHANGE_PASSWORD */
************************************************************/
BOOL check_lanman_password(char *user, uchar * pass1,
- uchar * pass2, SAM_ACCOUNT **hnd)
+ uchar * pass2, struct samu **hnd)
{
uchar unenc_new_pw[16];
uchar unenc_old_pw[16];
- SAM_ACCOUNT *sampass = NULL;
- uint16 acct_ctrl;
+ struct samu *sampass = NULL;
+ uint32 acct_ctrl;
const uint8 *lanman_pw;
BOOL ret;
+
+ if ( !(sampass = samu_new(NULL)) ) {
+ DEBUG(0, ("samu_new() failed!\n"));
+ return False;
+ }
become_root();
ret = pdb_getsampwnam(sampass, user);
if (ret == False) {
DEBUG(0,("check_lanman_password: getsampwnam returned NULL\n"));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return False;
}
if (acct_ctrl & ACB_DISABLED) {
DEBUG(0,("check_lanman_password: account %s disabled.\n", user));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return False;
}
return True;
} else {
DEBUG(0, ("check_lanman_password: no lanman password !\n"));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return False;
}
}
/* Check that the two old passwords match. */
if (memcmp(lanman_pw, unenc_old_pw, 16)) {
DEBUG(0,("check_lanman_password: old password doesn't match.\n"));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return False;
}
is correct before calling. JRA.
************************************************************/
-BOOL change_lanman_password(SAM_ACCOUNT *sampass, uchar *pass2)
+BOOL change_lanman_password(struct samu *sampass, uchar *pass2)
{
static uchar null_pw[16];
uchar unenc_new_pw[16];
BOOL ret;
- uint16 acct_ctrl;
+ uint32 acct_ctrl;
const uint8 *pwd;
if (sampass == NULL) {
return False; /* We lose the NT hash. Sorry. */
}
- if (!pdb_set_pass_changed_now (sampass)) {
- pdb_free_sam(&sampass);
+ if (!pdb_set_pass_last_set_time (sampass, time(NULL), PDB_CHANGED)) {
+ TALLOC_FREE(sampass);
/* Not quite sure what this one qualifies as, but this will do */
return False;
}
/* Now flush the sam_passwd struct to persistent storage */
- ret = pdb_update_sam_account (sampass);
+ ret = NT_STATUS_IS_OK(pdb_update_sam_account (sampass));
return ret;
}
************************************************************/
NTSTATUS pass_oem_change(char *user,
- uchar * lmdata, uchar * lmhash,
- uchar * ntdata, uchar * nthash)
+ uchar password_encrypted_with_lm_hash[516],
+ const uchar old_lm_hash_encrypted[16],
+ uchar password_encrypted_with_nt_hash[516],
+ const uchar old_nt_hash_encrypted[16],
+ uint32 *reject_reason)
{
- fstring new_passwd;
- SAM_ACCOUNT *sampass = NULL;
- NTSTATUS nt_status = check_oem_password(user, lmdata, lmhash, ntdata, nthash,
- &sampass, new_passwd, sizeof(new_passwd));
-
+ pstring new_passwd;
+ struct samu *sampass = NULL;
+ NTSTATUS nt_status = check_oem_password(user, password_encrypted_with_lm_hash,
+ old_lm_hash_encrypted,
+ password_encrypted_with_nt_hash,
+ old_nt_hash_encrypted,
+ &sampass, new_passwd, sizeof(new_passwd));
+
if (!NT_STATUS_IS_OK(nt_status))
return nt_status;
/* We've already checked the old password here.... */
become_root();
- nt_status = change_oem_password(sampass, NULL, new_passwd, True);
+ nt_status = change_oem_password(sampass, NULL, new_passwd, True, reject_reason);
unbecome_root();
memset(new_passwd, 0, sizeof(new_passwd));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return nt_status;
}
/***********************************************************
- Code to check the OEM hashed password.
+ Decrypt and verify a user password change.
- this function ignores the 516 byte nt OEM hashed password
- but does use the lm OEM password to check the nt hashed-hash.
+ The 516 byte long buffers are encrypted with the old NT and
+ old LM passwords, and if the NT passwords are present, both
+ buffers contain a unicode string.
+ After decrypting the buffers, check the password is correct by
+ matching the old hashed passwords with the passwords in the passdb.
+
************************************************************/
static NTSTATUS check_oem_password(const char *user,
- uchar * lmdata, const uchar * lmhash,
- const uchar * ntdata, const uchar * nthash,
- SAM_ACCOUNT **hnd, char *new_passwd,
- int new_passwd_size)
+ uchar password_encrypted_with_lm_hash[516],
+ const uchar old_lm_hash_encrypted[16],
+ uchar password_encrypted_with_nt_hash[516],
+ const uchar old_nt_hash_encrypted[16],
+ struct samu **hnd, char *new_passwd,
+ int new_passwd_size)
{
static uchar null_pw[16];
static uchar null_ntpw[16];
- SAM_ACCOUNT *sampass = NULL;
+ struct samu *sampass = NULL;
+ uint8 *password_encrypted;
+ const uint8 *encryption_key;
const uint8 *lanman_pw, *nt_pw;
- uint16 acct_ctrl;
- int new_pw_len;
- uchar new_ntp16[16];
- uchar unenc_old_ntpw[16];
- uchar new_p16[16];
- uchar unenc_old_pw[16];
+ uint32 acct_ctrl;
+ uint32 new_pw_len;
+ uchar new_nt_hash[16];
+ uchar new_lm_hash[16];
+ uchar verifier[16];
char no_pw[2];
BOOL ret;
- BOOL nt_pass_set = (ntdata != NULL && nthash != NULL);
+ BOOL nt_pass_set = (password_encrypted_with_nt_hash && old_nt_hash_encrypted);
+ BOOL lm_pass_set = (password_encrypted_with_lm_hash && old_lm_hash_encrypted);
*hnd = NULL;
- pdb_init_sam(&sampass);
+ if ( !(sampass = samu_new( NULL )) ) {
+ return NT_STATUS_NO_MEMORY;
+ }
become_root();
ret = pdb_getsampwnam(sampass, user);
if (ret == False) {
DEBUG(0, ("check_oem_password: getsmbpwnam returned NULL\n"));
- pdb_free_sam(&sampass);
- return NT_STATUS_WRONG_PASSWORD;
- /*
- TODO: check what Win2k returns for this:
- return NT_STATUS_NO_SUCH_USER;
- */
+ TALLOC_FREE(sampass);
+ return NT_STATUS_NO_SUCH_USER;
}
acct_ctrl = pdb_get_acct_ctrl(sampass);
if (acct_ctrl & ACB_DISABLED) {
- DEBUG(0,("check_lanman_password: account %s disabled.\n", user));
- pdb_free_sam(&sampass);
+ DEBUG(2,("check_lanman_password: account %s disabled.\n", user));
+ TALLOC_FREE(sampass);
return NT_STATUS_ACCOUNT_DISABLED;
}
- /* construct a null password (in case one is needed */
- no_pw[0] = 0;
- no_pw[1] = 0;
- nt_lm_owf_gen(no_pw, null_ntpw, null_pw);
+ if ((acct_ctrl & ACB_PWNOTREQ) && lp_null_passwords()) {
+ /* construct a null password (in case one is needed */
+ no_pw[0] = 0;
+ no_pw[1] = 0;
+ nt_lm_owf_gen(no_pw, null_ntpw, null_pw);
+ lanman_pw = null_pw;
+ nt_pw = null_pw;
- /* save pointers to passwords so we don't have to keep looking them up */
- lanman_pw = pdb_get_lanman_passwd(sampass);
- nt_pw = pdb_get_nt_passwd(sampass);
-
- /* check for null passwords */
- if (lanman_pw == NULL) {
- if (!(acct_ctrl & ACB_PWNOTREQ)) {
- DEBUG(0,("check_oem_password: no lanman password !\n"));
- pdb_free_sam(&sampass);
- return NT_STATUS_WRONG_PASSWORD;
+ } else {
+ /* save pointers to passwords so we don't have to keep looking them up */
+ if (lp_lanman_auth()) {
+ lanman_pw = pdb_get_lanman_passwd(sampass);
+ } else {
+ lanman_pw = NULL;
}
+ nt_pw = pdb_get_nt_passwd(sampass);
}
-
- if (pdb_get_nt_passwd(sampass) == NULL && nt_pass_set) {
- if (!(acct_ctrl & ACB_PWNOTREQ)) {
- DEBUG(0,("check_oem_password: no ntlm password !\n"));
- pdb_free_sam(&sampass);
- return NT_STATUS_WRONG_PASSWORD;
+
+ if (nt_pw && nt_pass_set) {
+ /* IDEAL Case: passwords are in unicode, and we can
+ * read use the password encrypted with the NT hash
+ */
+ password_encrypted = password_encrypted_with_nt_hash;
+ encryption_key = nt_pw;
+ } else if (lanman_pw && lm_pass_set) {
+ /* password may still be in unicode, but use LM hash version */
+ password_encrypted = password_encrypted_with_lm_hash;
+ encryption_key = lanman_pw;
+ } else if (nt_pass_set) {
+ DEBUG(1, ("NT password change supplied for user %s, but we have no NT password to check it with\n",
+ user));
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
+ } else if (lm_pass_set) {
+ if (lp_lanman_auth()) {
+ DEBUG(1, ("LM password change supplied for user %s, but we have no LanMan password to check it with\n",
+ user));
+ } else {
+ DEBUG(1, ("LM password change supplied for user %s, but we have disabled LanMan authentication\n",
+ user));
}
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
+ } else {
+ DEBUG(1, ("password change requested for user %s, but no password supplied!\n",
+ user));
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
}
-
- /*
- * Call the hash function to get the new password.
- */
- SamOEMhash( lmdata, lanman_pw, 516);
/*
- * The length of the new password is in the last 4 bytes of
- * the data buffer.
+ * Decrypt the password with the key
*/
+ SamOEMhash( password_encrypted, encryption_key, 516);
- new_pw_len = IVAL(lmdata, 512);
-
- if (new_pw_len < 0 || new_pw_len > new_passwd_size - 1) {
- DEBUG(0,("check_oem_password: incorrect password length (%d).\n", new_pw_len));
- pdb_free_sam(&sampass);
+ if ( !decode_pw_buffer(password_encrypted, new_passwd, new_passwd_size, &new_pw_len,
+ nt_pass_set ? STR_UNICODE : STR_ASCII)) {
+ TALLOC_FREE(sampass);
return NT_STATUS_WRONG_PASSWORD;
}
- if (nt_pass_set) {
- /*
- * nt passwords are in unicode
- */
- pull_ucs2(NULL, new_passwd,
- (const smb_ucs2_t *)&lmdata[512 - new_pw_len],
- new_passwd_size, new_pw_len, 0);
- } else {
- memcpy(new_passwd, &lmdata[512 - new_pw_len], new_pw_len);
- new_passwd[new_pw_len] = 0;
- }
-
/*
* To ensure we got the correct new password, hash it and
* use it as a key to test the passed old password.
*/
- nt_lm_owf_gen(new_passwd, new_ntp16, new_p16);
+ if (nt_pass_set) {
+ /* NT passwords, verify the NT hash. */
+
+ /* Calculate the MD4 hash (NT compatible) of the password */
+ memset(new_nt_hash, '\0', 16);
+ E_md4hash(new_passwd, new_nt_hash);
+
+ if (nt_pw) {
+ /*
+ * check the NT verifier
+ */
+ E_old_pw_hash(new_nt_hash, nt_pw, verifier);
+ if (memcmp(verifier, old_nt_hash_encrypted, 16)) {
+ DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+ /* We could check the LM password here, but there is
+ * little point, we already know the password is
+ * correct, and the LM password might not even be
+ * present. */
+
+ /* Further, LM hash generation algorithms
+ * differ with charset, so we could
+ * incorrectly fail a perfectly valid password
+ * change */
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,
+ ("check_oem_password: password %s ok\n", new_passwd));
+#endif
+ *hnd = sampass;
+ return NT_STATUS_OK;
+ }
+
+ if (lanman_pw) {
+ /*
+ * check the lm verifier
+ */
+ E_old_pw_hash(new_nt_hash, lanman_pw, verifier);
+ if (memcmp(verifier, old_lm_hash_encrypted, 16)) {
+ DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,
+ ("check_oem_password: password %s ok\n", new_passwd));
+#endif
+ *hnd = sampass;
+ return NT_STATUS_OK;
+ }
+ }
+
+ if (lanman_pw && lm_pass_set) {
+
+ E_deshash(new_passwd, new_lm_hash);
- if (!nt_pass_set) {
/*
- * Now use new_p16 as the key to see if the old
- * password matches.
+ * check the lm verifier
*/
- D_P16(new_p16, lmhash, unenc_old_pw);
-
- if (memcmp(lanman_pw, unenc_old_pw, 16)) {
+ E_old_pw_hash(new_lm_hash, lanman_pw, verifier);
+ if (memcmp(verifier, old_lm_hash_encrypted, 16)) {
DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
- pdb_free_sam(&sampass);
+ TALLOC_FREE(sampass);
return NT_STATUS_WRONG_PASSWORD;
}
-
+
#ifdef DEBUG_PASSWORD
DEBUG(100,
("check_oem_password: password %s ok\n", new_passwd));
return NT_STATUS_OK;
}
- /*
- * Now use new_p16 as the key to see if the old
- * password matches.
- */
- D_P16(new_ntp16, lmhash, unenc_old_pw);
- D_P16(new_ntp16, nthash, unenc_old_ntpw);
+ /* should not be reached */
+ TALLOC_FREE(sampass);
+ return NT_STATUS_WRONG_PASSWORD;
+}
- if (memcmp(lanman_pw, unenc_old_pw, 16)) {
- DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
- pdb_free_sam(&sampass);
- return NT_STATUS_WRONG_PASSWORD;
+/***********************************************************
+ This routine takes the given password and checks it against
+ the password history. Returns True if this password has been
+ found in the history list.
+************************************************************/
+
+static BOOL check_passwd_history(struct samu *sampass, const char *plaintext)
+{
+ uchar new_nt_p16[NT_HASH_LEN];
+ uchar zero_md5_nt_pw[SALTED_MD5_HASH_LEN];
+ const uint8 *nt_pw;
+ const uint8 *pwhistory;
+ BOOL found = False;
+ int i;
+ uint32 pwHisLen, curr_pwHisLen;
+
+ pdb_get_account_policy(AP_PASSWORD_HISTORY, &pwHisLen);
+ if (pwHisLen == 0) {
+ return False;
}
- if (memcmp(nt_pw, unenc_old_ntpw, 16)) {
- DEBUG(0,("check_oem_password: old nt password doesn't match.\n"));
- pdb_free_sam(&sampass);
- return NT_STATUS_WRONG_PASSWORD;
+ pwhistory = pdb_get_pw_history(sampass, &curr_pwHisLen);
+ if (!pwhistory || curr_pwHisLen == 0) {
+ return False;
}
-#ifdef DEBUG_PASSWORD
- DEBUG(100, ("check_oem_password: password %s ok\n", new_passwd));
-#endif
- *hnd = sampass;
- return NT_STATUS_OK;
+ /* Only examine the minimum of the current history len and
+ the stored history len. Avoids race conditions. */
+ pwHisLen = MIN(pwHisLen,curr_pwHisLen);
+
+ nt_pw = pdb_get_nt_passwd(sampass);
+
+ E_md4hash(plaintext, new_nt_p16);
+
+ if (!memcmp(nt_pw, new_nt_p16, NT_HASH_LEN)) {
+ DEBUG(10,("check_passwd_history: proposed new password for user %s is the same as the current password !\n",
+ pdb_get_username(sampass) ));
+ return True;
+ }
+
+ dump_data(100, new_nt_p16, NT_HASH_LEN);
+ dump_data(100, pwhistory, PW_HISTORY_ENTRY_LEN*pwHisLen);
+
+ memset(zero_md5_nt_pw, '\0', SALTED_MD5_HASH_LEN);
+ for (i=0; i<pwHisLen; i++) {
+ uchar new_nt_pw_salted_md5_hash[SALTED_MD5_HASH_LEN];
+ const uchar *current_salt = &pwhistory[i*PW_HISTORY_ENTRY_LEN];
+ const uchar *old_nt_pw_salted_md5_hash = &pwhistory[(i*PW_HISTORY_ENTRY_LEN)+
+ PW_HISTORY_SALT_LEN];
+ if (!memcmp(zero_md5_nt_pw, old_nt_pw_salted_md5_hash, SALTED_MD5_HASH_LEN)) {
+ /* Ignore zero valued entries. */
+ continue;
+ }
+ /* Create salted versions of new to compare. */
+ E_md5hash(current_salt, new_nt_p16, new_nt_pw_salted_md5_hash);
+
+ if (!memcmp(new_nt_pw_salted_md5_hash, old_nt_pw_salted_md5_hash, SALTED_MD5_HASH_LEN)) {
+ DEBUG(1,("check_passwd_history: proposed new password for user %s found in history list !\n",
+ pdb_get_username(sampass) ));
+ found = True;
+ break;
+ }
+ }
+ return found;
}
/***********************************************************
is correct before calling. JRA.
************************************************************/
-NTSTATUS change_oem_password(SAM_ACCOUNT *hnd, char *old_passwd, char *new_passwd, BOOL as_root)
+NTSTATUS change_oem_password(struct samu *hnd, char *old_passwd, char *new_passwd, BOOL as_root, uint32 *samr_reject_reason)
{
- BOOL ret;
uint32 min_len;
+ uint32 refuse;
+ struct passwd *pass = NULL;
+ const char *username = pdb_get_username(hnd);
+ time_t can_change_time = pdb_get_pass_can_change_time(hnd);
- if (time(NULL) < pdb_get_pass_can_change_time(hnd)) {
- DEBUG(1, ("user %s cannot change password now, must wait until %s\n",
- pdb_get_username(hnd), http_timestring(pdb_get_pass_can_change_time(hnd))));
- return NT_STATUS_PASSWORD_RESTRICTION;
+ if (samr_reject_reason) {
+ *samr_reject_reason = Undefined;
+ }
+
+ /* check to see if the secdesc has previously been set to disallow */
+ if (!pdb_get_pass_can_change(hnd)) {
+ DEBUG(1, ("user %s does not have permissions to change password\n", username));
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_OTHER;
+ }
+ return NT_STATUS_ACCOUNT_RESTRICTION;
}
- if (account_policy_get(AP_MIN_PASSWORD_LEN, &min_len) && (strlen(new_passwd) < min_len)) {
+ /* check to see if it is a Machine account and if the policy
+ * denies machines to change the password. *
+ * Should we deny also SRVTRUST and/or DOMSTRUST ? .SSS. */
+ if (pdb_get_acct_ctrl(hnd) & ACB_WSTRUST) {
+ if (pdb_get_account_policy(AP_REFUSE_MACHINE_PW_CHANGE, &refuse) && refuse) {
+ DEBUG(1, ("Machine %s cannot change password now, "
+ "denied by Refuse Machine Password Change policy\n",
+ username));
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_OTHER;
+ }
+ return NT_STATUS_ACCOUNT_RESTRICTION;
+ }
+ }
+
+ /* removed calculation here, becuase passdb now calculates
+ based on policy. jmcd */
+ if ((can_change_time != 0) && (time(NULL) < can_change_time)) {
+ DEBUG(1, ("user %s cannot change password now, must "
+ "wait until %s\n", username,
+ http_timestring(can_change_time)));
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_OTHER;
+ }
+ return NT_STATUS_ACCOUNT_RESTRICTION;
+ }
+
+ if (pdb_get_account_policy(AP_MIN_PASSWORD_LEN, &min_len) && (str_charnum(new_passwd) < min_len)) {
DEBUG(1, ("user %s cannot change password - password too short\n",
- pdb_get_username(hnd)));
+ username));
DEBUGADD(1, (" account policy min password len = %d\n", min_len));
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_TOO_SHORT;
+ }
return NT_STATUS_PASSWORD_RESTRICTION;
/* return NT_STATUS_PWD_TOO_SHORT; */
}
- /* Take the passed information and test it for minimum criteria */
- /* Minimum password length */
- if (strlen(new_passwd) < lp_min_passwd_length()) {
- /* too short, must be at least MINPASSWDLENGTH */
- DEBUG(1, ("Password Change: user %s, New password is shorter than minimum password length = %d\n",
- pdb_get_username(hnd), lp_min_passwd_length()));
+ if (check_passwd_history(hnd,new_passwd)) {
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_IN_HISTORY;
+ }
return NT_STATUS_PASSWORD_RESTRICTION;
-/* return NT_STATUS_PWD_TOO_SHORT; */
}
- /* TODO: Add cracklib support here */
+ pass = Get_Pwnam(username);
+ if (!pass) {
+ DEBUG(1, ("change_oem_password: Username %s does not exist in system !?!\n", username));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* Use external script to check password complexity */
+ if (lp_check_password_script() && *(lp_check_password_script())) {
+ int check_ret;
+
+ check_ret = smbrunsecret(lp_check_password_script(), new_passwd);
+ DEBUG(5, ("change_oem_password: check password script (%s) returned [%d]\n", lp_check_password_script(), check_ret));
+
+ if (check_ret != 0) {
+ DEBUG(1, ("change_oem_password: check password script said new password is not good enough!\n"));
+ if (samr_reject_reason) {
+ *samr_reject_reason = REJECT_REASON_NOT_COMPLEX;
+ }
+ return NT_STATUS_PASSWORD_RESTRICTION;
+ }
+ }
/*
* If unix password sync was requested, attempt to change
*/
if(lp_unix_password_sync() &&
- !chgpasswd(pdb_get_username(hnd), old_passwd, new_passwd, as_root)) {
+ !chgpasswd(username, pass, old_passwd, new_passwd, as_root)) {
return NT_STATUS_ACCESS_DENIED;
}
}
/* Now write it into the file. */
- ret = pdb_update_sam_account (hnd);
-
- if (!ret) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- return NT_STATUS_OK;
+ return pdb_update_sam_account (hnd);
}
git.samba.org / tprouty / samba.git / blobdiff