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-rw-r--r--source3/auth/pass_check.c149
1 files changed, 116 insertions, 33 deletions
diff --git a/source3/auth/pass_check.c b/source3/auth/pass_check.c
index 27915bf499..fe1f98c150 100644
--- a/source3/auth/pass_check.c
+++ b/source3/auth/pass_check.c
@@ -26,10 +26,61 @@
#define DBGC_CLASS DBGC_AUTH
/* these are kept here to keep the string_combinations function simple */
-static fstring this_user;
-#if !defined(WITH_PAM)
-static fstring this_salt;
-static fstring this_crypted;
+static char *ths_user;
+
+static const char *get_this_user()
+{
+ if (!ths_user) {
+ return "";
+ }
+ return ths_user;
+}
+
+#if defined(WITH_PAM) || defined(OSF1_ENH_SEC)
+static const char *set_this_user(const char *newuser)
+{
+ char *orig_user = ths_user;
+ ths_user = SMB_STRDUP(newuser);
+ SAFE_FREE(orig_user);
+ return ths_user;
+}
+#endif
+
+#if !defined(WITH_PAM)
+static char *ths_salt;
+/* This must be writable. */
+static char *get_this_salt()
+{
+ return ths_salt;
+}
+
+/* We may be setting a modified version of the same
+ * string, so don't free before use. */
+
+static const char *set_this_salt(const char *newsalt)
+{
+ char *orig_salt = ths_salt;
+ ths_salt = SMB_STRDUP(newsalt);
+ SAFE_FREE(orig_salt);
+ return ths_salt;
+}
+
+static char *ths_crypted;
+static const char *get_this_crypted()
+{
+ if (!ths_crypted) {
+ return "";
+ }
+ return ths_crypted;
+}
+
+static const char *set_this_crypted(const char *newcrypted)
+{
+ char *orig_crypted = ths_crypted;
+ ths_crypted = SMB_STRDUP(newcrypted);
+ SAFE_FREE(orig_crypted);
+ return ths_crypted;
+}
#endif
#ifdef WITH_AFS
@@ -113,7 +164,7 @@ static bool dfs_auth(char *user, char *password)
* Assumes local passwd file is kept in sync w/ DCE RGY!
*/
- if (strcmp((char *)crypt(password, this_salt), this_crypted))
+ if (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()))
{
return (False);
}
@@ -492,29 +543,29 @@ core of password checking routine
static NTSTATUS password_check(const char *password)
{
#ifdef WITH_PAM
- return smb_pam_passcheck(this_user, password);
+ return smb_pam_passcheck(get_this_user(), password);
#else
bool ret;
#ifdef WITH_AFS
- if (afs_auth(this_user, password))
+ if (afs_auth(get_this_user(), password))
return NT_STATUS_OK;
#endif /* WITH_AFS */
#ifdef WITH_DFS
- if (dfs_auth(this_user, password))
+ if (dfs_auth(get_this_user(), password))
return NT_STATUS_OK;
#endif /* WITH_DFS */
#ifdef OSF1_ENH_SEC
- ret = (strcmp(osf1_bigcrypt(password, this_salt),
- this_crypted) == 0);
+ ret = (strcmp(osf1_bigcrypt(password, get_this_salt()),
+ get_this_crypted()) == 0);
if (!ret) {
DEBUG(2,
("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
- ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
}
if (ret) {
return NT_STATUS_OK;
@@ -525,7 +576,7 @@ static NTSTATUS password_check(const char *password)
#endif /* OSF1_ENH_SEC */
#ifdef ULTRIX_AUTH
- ret = (strcmp((char *)crypt16(password, this_salt), this_crypted) == 0);
+ ret = (strcmp((char *)crypt16(password, get_this_salt()), get_this_crypted()) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
@@ -535,7 +586,7 @@ static NTSTATUS password_check(const char *password)
#endif /* ULTRIX_AUTH */
#ifdef LINUX_BIGCRYPT
- ret = (linux_bigcrypt(password, this_salt, this_crypted));
+ ret = (linux_bigcrypt(password, get_this_salt(), get_this_crypted()));
if (ret) {
return NT_STATUS_OK;
} else {
@@ -552,10 +603,10 @@ static NTSTATUS password_check(const char *password)
* by crypt.
*/
- if (strcmp(bigcrypt(password, this_salt), this_crypted) == 0)
+ if (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0)
return NT_STATUS_OK;
else
- ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
@@ -564,7 +615,7 @@ static NTSTATUS password_check(const char *password)
#else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
#ifdef HAVE_BIGCRYPT
- ret = (strcmp(bigcrypt(password, this_salt), this_crypted) == 0);
+ ret = (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
@@ -576,7 +627,7 @@ static NTSTATUS password_check(const char *password)
DEBUG(1, ("Warning - no crypt available\n"));
return NT_STATUS_LOGON_FAILURE;
#else /* HAVE_CRYPT */
- ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
@@ -621,7 +672,9 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
* checks below and dive straight into the PAM code.
*/
- fstrcpy(this_user, user);
+ if (set_this_user(user) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
DEBUG(4, ("pass_check: Checking (PAM) password for user %s (l=%d)\n", user, pwlen));
@@ -638,8 +691,12 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
/* Copy into global for the convenience of looping code */
/* Also the place to keep the 'password' no matter what
crazy struct it started in... */
- fstrcpy(this_crypted, pass->pw_passwd);
- fstrcpy(this_salt, pass->pw_passwd);
+ if (set_this_crypted(pass->pw_passwd) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (set_this_salt(pass->pw_passwd) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
#ifdef HAVE_GETSPNAM
{
@@ -652,8 +709,12 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
spass = getspnam(pass->pw_name);
if (spass && spass->sp_pwdp) {
- fstrcpy(this_crypted, spass->sp_pwdp);
- fstrcpy(this_salt, spass->sp_pwdp);
+ if (set_this_crypted(spass->sp_pwdp) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (set_this_salt(spass->sp_pwdp) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
}
}
#elif defined(IA_UINFO)
@@ -671,8 +732,11 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
#ifdef HAVE_GETPRPWNAM
{
struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
- if (pr_pw && pr_pw->ufld.fd_encrypt)
- fstrcpy(this_crypted, pr_pw->ufld.fd_encrypt);
+ if (pr_pw && pr_pw->ufld.fd_encrypt) {
+ if (set_this_crypted(pr_pw->ufld.fd_encrypt) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
}
#endif
@@ -680,8 +744,11 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
{
struct passwd_adjunct *pwret;
pwret = getpwanam(s);
- if (pwret && pwret->pwa_passwd)
- fstrcpy(this_crypted, pwret->pwa_passwd);
+ if (pwret && pwret->pwa_passwd) {
+ if (set_this_crypted(pwret->pwa_passwd) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
}
#endif
@@ -692,8 +759,12 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
user));
mypasswd = getprpwnam(user);
if (mypasswd) {
- fstrcpy(this_user, mypasswd->ufld.fd_name);
- fstrcpy(this_crypted, mypasswd->ufld.fd_encrypt);
+ if (set_this_user(mypasswd->ufld.fd_name) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (set_this_crypted(mypasswd->ufld.fd_encrypt) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
} else {
DEBUG(5,
("OSF1_ENH_SEC: No entry for user %s in protected database !\n",
@@ -706,7 +777,10 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
{
AUTHORIZATION *ap = getauthuid(pass->pw_uid);
if (ap) {
- fstrcpy(this_crypted, ap->a_password);
+ if (set_this_crypted(ap->a_password) == NULL) {
+ endauthent();
+ return NT_STATUS_NO_MEMORY;
+ }
endauthent();
}
}
@@ -715,19 +789,28 @@ NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *pas
#if defined(HAVE_TRUNCATED_SALT)
/* crypt on some platforms (HPUX in particular)
won't work with more than 2 salt characters. */
- this_salt[2] = 0;
+ {
+ char *trunc_salt = get_this_salt();
+ if (!trunc_salt || strlen(trunc_salt) < 2) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+ trunc_salt[2] = 0;
+ if (set_this_salt(trunc_salt) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
#endif
- if (!*this_crypted) {
+ if (!get_this_crypted() || !*get_this_crypted()) {
if (!lp_null_passwords()) {
DEBUG(2, ("Disallowing %s with null password\n",
- this_user));
+ get_this_user()));
return NT_STATUS_LOGON_FAILURE;
}
if (!*password) {
DEBUG(3,
("Allowing access to %s with null password\n",
- this_user));
+ get_this_user()));
return NT_STATUS_OK;
}
}
generated by cgit (git 2.34.1) at 2024-12-18 04:29:11 +0000