On Wed, Oct 22, 2008 at 12:34:48PM -0700, Jeremy Allison wrote:
> On Wed, Oct 22, 2008 at 12:15:00PM -0700, Jeremy Allison wrote:
>
> > Great catch. Both look valid to me. I think the best fix for
> > 3.2 is to always set rid_crypt to true, and remove all the
> > other sam_pwd_hash() calls - just do it in the one place.
> >
> > Ok, here is a quick patch for 3.2. It removes some silly
> > static buffers and changes all calls to samsync_fix_delta_array()
> > to set rid_crypt = true and then removes all the extra
> > crypto sam_pwd_hash() calls that are no longer needed.
> >
> > Can you confirm it works for you and I'll check it in
> > with your credit, and then fix 3.3 and master in the
> > same way.
>
> Sorry, missed the ntpasswd <--> lmpasswd swap.
>
> Here's the correct version for 3.2.
Ok, third time lucky :-). As we're always using
rid_crypt = true, remove the argument. Also cope
with detecting the zero'ed nt and lm passwords
at the correct place (before the sam_pwd_hash()
call).
3.2 patch (final :-).
Jeremy.
diff --git a/source/libnet/libnet_samsync.c b/source/libnet/libnet_samsync.c
index 61d53c3..8a14338 100644
--- a/source/libnet/libnet_samsync.c
+++ b/source/libnet/libnet_samsync.c
@@ -32,7 +32,6 @@
static NTSTATUS fix_user(TALLOC_CTX *mem_ctx,
DATA_BLOB *session_key,
- bool rid_crypt,
enum netr_SamDatabaseID database_id,
struct netr_DELTA_ENUM *delta)
{
@@ -41,17 +40,29 @@ static NTSTATUS fix_user(TALLOC_CTX *mem_ctx,
struct netr_DELTA_USER *user = delta->delta_union.user;
struct samr_Password lm_hash;
struct samr_Password nt_hash;
+ unsigned char zero_buf[16];
- if (rid_crypt) {
- if (user->lm_password_present) {
+ memset(zero_buf, '\0', sizeof(zero_buf));
+
+ /* Note that win2000 may send us all zeros
+ * for the hashes if it doesn't
+ * think this channel is secure enough. */
+ if (user->lm_password_present) {
+ if (memcmp(user->lmpassword.hash, zero_buf, 16) != 0) {
sam_pwd_hash(rid, user->lmpassword.hash, lm_hash.hash,
0);
- user->lmpassword = lm_hash;
+ } else {
+ memset(lm_hash.hash, '\0', sizeof(lm_hash.hash));
}
+ user->lmpassword = lm_hash;
+ }
- if (user->nt_password_present) {
+ if (user->nt_password_present) {
+ if (memcmp(user->ntpassword.hash, zero_buf, 16) != 0) {
sam_pwd_hash(rid, user->ntpassword.hash, nt_hash.hash,
0);
- user->ntpassword = nt_hash;
+ } else {
+ memset(nt_hash.hash, '\0', sizeof(nt_hash.hash));
}
+ user->ntpassword = nt_hash;
}
if (user->user_private_info.SensitiveData) {
@@ -71,26 +82,31 @@ static NTSTATUS fix_user(TALLOC_CTX *mem_ctx,
return ndr_map_error2ntstatus(ndr_err);
}
+ /* Note that win2000 may send us all zeros
+ * for the hashes if it doesn't
+ * think this channel is secure enough. */
if (keys.keys.keys2.lmpassword.length == 16) {
- if (rid_crypt) {
+ if (memcmp(keys.keys.keys2.lmpassword.pwd.hash,
+ zero_buf, 16) != 0) {
sam_pwd_hash(rid,
keys.keys.keys2.lmpassword.pwd.hash,
lm_hash.hash, 0);
- user->lmpassword = lm_hash;
} else {
- user->lmpassword =
keys.keys.keys2.lmpassword.pwd;
+ memset(lm_hash.hash, '\0',
sizeof(lm_hash.hash));
}
+ user->lmpassword = lm_hash;
user->lm_password_present = true;
}
if (keys.keys.keys2.ntpassword.length == 16) {
- if (rid_crypt) {
+ if (memcmp(keys.keys.keys2.ntpassword.pwd.hash,
+ zero_buf, 16) != 0) {
sam_pwd_hash(rid,
-
keys.keys.keys2.ntpassword.pwd.hash,
- nt_hash.hash, 0);
- user->ntpassword = nt_hash;
+ keys.keys.keys2.ntpassword.pwd.hash,
+ nt_hash.hash, 0);
} else {
- user->ntpassword =
keys.keys.keys2.ntpassword.pwd;
+ memset(nt_hash.hash, '\0',
sizeof(nt_hash.hash));
}
+ user->ntpassword = nt_hash;
user->nt_password_present = true;
}
/* TODO: rid decrypt history fields */
@@ -128,7 +144,6 @@ static NTSTATUS fix_secret(TALLOC_CTX *mem_ctx,
static NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx,
DATA_BLOB *session_key,
- bool rid_crypt,
enum netr_SamDatabaseID database_id,
struct netr_DELTA_ENUM *delta)
{
@@ -139,7 +154,6 @@ static NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx,
status = fix_user(mem_ctx,
session_key,
- rid_crypt,
database_id,
delta);
break;
@@ -164,7 +178,6 @@ static NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx,
NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx,
DATA_BLOB *session_key,
- bool rid_crypt,
enum netr_SamDatabaseID database_id,
struct netr_DELTA_ENUM_ARRAY *r)
{
@@ -175,7 +188,6 @@ NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx,
status = samsync_fix_delta(mem_ctx,
session_key,
- rid_crypt,
database_id,
&r->delta_enum[i]);
if (!NT_STATUS_IS_OK(status)) {
diff --git a/source/utils/net_rpc_samsync.c b/source/utils/net_rpc_samsync.c
index 13a7bce..49e5c1a 100644
--- a/source/utils/net_rpc_samsync.c
+++ b/source/utils/net_rpc_samsync.c
@@ -65,21 +65,19 @@ static void display_account_info(uint32_t rid,
struct netr_DELTA_USER *r)
{
fstring hex_nt_passwd, hex_lm_passwd;
- uchar lm_passwd[16], nt_passwd[16];
- static uchar zero_buf[16];
+ uchar zero_buf[16];
+ memset(zero_buf, '\0', sizeof(zero_buf));
/* Decode hashes from password hash (if they are not NULL) */
if (memcmp(r->lmpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->lmpassword.hash, lm_passwd, 0);
- pdb_sethexpwd(hex_lm_passwd, lm_passwd, r->acct_flags);
+ pdb_sethexpwd(hex_lm_passwd, r->lmpassword.hash, r->acct_flags);
} else {
pdb_sethexpwd(hex_lm_passwd, NULL, 0);
}
if (memcmp(r->ntpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->ntpassword.hash, nt_passwd, 0);
- pdb_sethexpwd(hex_nt_passwd, nt_passwd, r->acct_flags);
+ pdb_sethexpwd(hex_nt_passwd, r->ntpassword.hash, r->acct_flags);
} else {
pdb_sethexpwd(hex_nt_passwd, NULL, 0);
}
@@ -391,7 +389,6 @@ static void dump_database(struct rpc_pipe_client *pipe_hnd,
samsync_fix_delta_array(mem_ctx,
&session_key,
- false,
database_id,
delta_enum_array);
@@ -466,8 +463,9 @@ static NTSTATUS sam_account_from_delta(struct samu *account,
{
const char *old_string, *new_string;
time_t unix_time, stored_time;
- uchar lm_passwd[16], nt_passwd[16];
- static uchar zero_buf[16];
+ uchar zero_buf[16];
+
+ memset(zero_buf, '\0', sizeof(zero_buf));
/* Username, fullname, home dir, dir drive, logon script, acct
desc, workstations, profile. */
@@ -631,14 +629,12 @@ static NTSTATUS sam_account_from_delta(struct samu
*account,
think this channel is secure enough - don't set the passwords at all
in that case
*/
- if (memcmp(r->ntpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->ntpassword.hash, lm_passwd, 0);
- pdb_set_lanman_passwd(account, lm_passwd, PDB_CHANGED);
+ if (memcmp(r->lmpassword.hash, zero_buf, 16) != 0) {
+ pdb_set_lanman_passwd(account, r->lmpassword.hash, PDB_CHANGED);
}
- if (memcmp(r->lmpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->lmpassword.hash, nt_passwd, 0);
- pdb_set_nt_passwd(account, nt_passwd, PDB_CHANGED);
+ if (memcmp(r->ntpassword.hash, zero_buf, 16) != 0) {
+ pdb_set_nt_passwd(account, r->ntpassword.hash, PDB_CHANGED);
}
/* TODO: account expiry time */
@@ -1257,7 +1253,6 @@ static NTSTATUS fetch_database(struct rpc_pipe_client
*pipe_hnd, uint32 db_type,
samsync_fix_delta_array(mem_ctx,
&session_key,
- true,
database_id,
delta_enum_array);
@@ -1755,15 +1750,16 @@ static NTSTATUS fetch_account_info_to_ldif(struct
netr_DELTA_USER *r,
fstring username, logonscript, homedrive, homepath = "", homedir = "";
fstring hex_nt_passwd, hex_lm_passwd;
fstring description, profilepath, fullname, sambaSID;
- uchar lm_passwd[16], nt_passwd[16];
char *flags, *user_rdn;
const char *ou;
const char* nopasswd = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
- static uchar zero_buf[16];
+ uchar zero_buf[16];
uint32 rid = 0, group_rid = 0, gidNumber = 0;
time_t unix_time;
int i;
+ memset(zero_buf, '\0', sizeof(zero_buf));
+
/* Get the username */
fstrcpy(username, r->account_name.string);
@@ -1808,14 +1804,12 @@ static NTSTATUS fetch_account_info_to_ldif(struct
netr_DELTA_USER *r,
/* Get lm and nt password data */
if (memcmp(r->lmpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->lmpassword.hash, lm_passwd, 0);
- pdb_sethexpwd(hex_lm_passwd, lm_passwd, r->acct_flags);
+ pdb_sethexpwd(hex_lm_passwd, r->lmpassword.hash, r->acct_flags);
} else {
pdb_sethexpwd(hex_lm_passwd, NULL, 0);
}
if (memcmp(r->ntpassword.hash, zero_buf, 16) != 0) {
- sam_pwd_hash(r->rid, r->ntpassword.hash, nt_passwd, 0);
- pdb_sethexpwd(hex_nt_passwd, nt_passwd, r->acct_flags);
+ pdb_sethexpwd(hex_nt_passwd, r->ntpassword.hash, r->acct_flags);
} else {
pdb_sethexpwd(hex_nt_passwd, NULL, 0);
}
@@ -2173,7 +2167,6 @@ static NTSTATUS fetch_database_to_ldif(struct
rpc_pipe_client *pipe_hnd,
samsync_fix_delta_array(mem_ctx,
&session_key,
- true,
database_id,
delta_enum_array);
--
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