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Diffstat (limited to 'source4/rpc_server/samr/samdb.c')
-rw-r--r--source4/rpc_server/samr/samdb.c102
1 files changed, 64 insertions, 38 deletions
diff --git a/source4/rpc_server/samr/samdb.c b/source4/rpc_server/samr/samdb.c
index 2489dae684..76de26222d 100644
--- a/source4/rpc_server/samr/samdb.c
+++ b/source4/rpc_server/samr/samdb.c
@@ -840,9 +840,12 @@ static BOOL samdb_password_complexity_ok(const char *pass)
password restrictions
*/
NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
- const char *user_dn, const char *domain_dn,
- struct ldb_message *mod, const char *new_pass,
- BOOL user_change)
+ const char *user_dn, const char *domain_dn,
+ struct ldb_message *mod,
+ const char *new_pass,
+ struct samr_Hash *lmNewHash,
+ struct samr_Hash *ntNewHash,
+ BOOL user_change)
{
const char * const user_attrs[] = { "userAccountControl", "lmPwdHistory",
"ntPwdHistory", "unicodePwd",
@@ -857,15 +860,14 @@ NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
uint_t userAccountControl, badPwdCount;
struct samr_Hash *lmPwdHistory, *ntPwdHistory, lmPwdHash, ntPwdHash;
struct samr_Hash *new_lmPwdHistory, *new_ntPwdHistory;
- struct samr_Hash lmNewHash, ntNewHash;
- uint_t lmPwdHistory_len, ntPwdHistory_len;
+ struct samr_Hash local_lmNewHash, local_ntNewHash;
+ int lmPwdHistory_len, ntPwdHistory_len;
struct ldb_message **res;
int count;
time_t now = time(NULL);
NTTIME now_nt;
double now_double;
int i;
- BOOL lm_hash_ok;
/* we need to know the time to compute password age */
unix_to_nt_time(&now_nt, now);
@@ -897,9 +899,25 @@ NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
minPwdLength = samdb_result_uint(res[0], "minPwdLength", 0);
minPwdAge = samdb_result_double(res[0], "minPwdAge", 0);
- /* compute the new nt and lm hashes */
- lm_hash_ok = E_deshash(new_pass, lmNewHash.hash);
- E_md4hash(new_pass, ntNewHash.hash);
+ if (new_pass) {
+ /* check the various password restrictions */
+ if (minPwdLength > str_charnum(new_pass)) {
+ return NT_STATUS_PASSWORD_RESTRICTION;
+ }
+
+ /* possibly check password complexity */
+ if (pwdProperties & DOMAIN_PASSWORD_COMPLEX &&
+ !samdb_password_complexity_ok(new_pass)) {
+ return NT_STATUS_PASSWORD_RESTRICTION;
+ }
+
+ /* compute the new nt and lm hashes */
+ if (E_deshash(new_pass, local_lmNewHash.hash)) {
+ lmNewHash = &local_lmNewHash;
+ }
+ E_md4hash(new_pass, local_ntNewHash.hash);
+ ntNewHash = &local_ntNewHash;
+ }
if (user_change) {
/* are all password changes disallowed? */
@@ -919,10 +937,10 @@ NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
/* check the immediately past password */
if (pwdHistoryLength > 0) {
- if (lm_hash_ok && memcmp(lmNewHash.hash, lmPwdHash.hash, 16) == 0) {
+ if (lmNewHash && memcmp(lmNewHash->hash, lmPwdHash.hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
- if (memcmp(ntNewHash.hash, ntPwdHash.hash, 16) == 0) {
+ if (ntNewHash && memcmp(ntNewHash->hash, ntPwdHash.hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
}
@@ -932,51 +950,45 @@ NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
ntPwdHistory_len = MIN(ntPwdHistory_len, pwdHistoryLength);
if (pwdHistoryLength > 0) {
- if (unicodePwd && strcmp(unicodePwd, new_pass) == 0) {
+ if (unicodePwd && new_pass && strcmp(unicodePwd, new_pass) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
- if (lm_hash_ok && memcmp(lmNewHash.hash, lmPwdHash.hash, 16) == 0) {
+ if (lmNewHash && memcmp(lmNewHash->hash, lmPwdHash.hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
- if (memcmp(ntNewHash.hash, ntPwdHash.hash, 16) == 0) {
+ if (ntNewHash && memcmp(ntNewHash->hash, ntPwdHash.hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
}
- for (i=0;lm_hash_ok && i<lmPwdHistory_len;i++) {
- if (memcmp(lmNewHash.hash, lmPwdHistory[i].hash, 16) == 0) {
+ for (i=0; lmNewHash && i<lmPwdHistory_len;i++) {
+ if (memcmp(lmNewHash->hash, lmPwdHistory[i].hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
}
- for (i=0;i<ntPwdHistory_len;i++) {
- if (memcmp(ntNewHash.hash, ntPwdHistory[i].hash, 16) == 0) {
+ for (i=0; ntNewHash && i<ntPwdHistory_len;i++) {
+ if (memcmp(ntNewHash->hash, ntPwdHistory[i].hash, 16) == 0) {
return NT_STATUS_PASSWORD_RESTRICTION;
}
}
}
- /* check the various password restrictions */
- if (minPwdLength > str_charnum(new_pass)) {
- return NT_STATUS_PASSWORD_RESTRICTION;
- }
-
- /* possibly check password complexity */
- if (pwdProperties & DOMAIN_PASSWORD_COMPLEX &&
- !samdb_password_complexity_ok(new_pass)) {
- return NT_STATUS_PASSWORD_RESTRICTION;
- }
-
#define CHECK_RET(x) do { if (x != 0) return NT_STATUS_NO_MEMORY; } while(0)
/* the password is acceptable. Start forming the new fields */
- if (lm_hash_ok) {
- CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "lmPwdHash", lmNewHash));
+ if (lmNewHash) {
+ CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "lmPwdHash", *lmNewHash));
} else {
CHECK_RET(samdb_msg_add_delete(ctx, mem_ctx, mod, "lmPwdHash"));
}
- CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "ntPwdHash", ntNewHash));
- if ((pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT) &&
+ if (ntNewHash) {
+ CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "ntPwdHash", *ntNewHash));
+ } else {
+ CHECK_RET(samdb_msg_add_delete(ctx, mem_ctx, mod, "ntPwdHash"));
+ }
+
+ if (new_pass && (pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT) &&
(userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
CHECK_RET(samdb_msg_add_string(ctx, mem_ctx, mod,
"unicodePwd", new_pass));
@@ -1009,17 +1021,31 @@ NTSTATUS samdb_set_password(void *ctx, TALLOC_CTX *mem_ctx,
for (i=0;i<MIN(pwdHistoryLength-1, ntPwdHistory_len);i++) {
new_ntPwdHistory[i+1] = ntPwdHistory[i];
}
- new_lmPwdHistory[0] = lmNewHash;
- new_ntPwdHistory[0] = ntNewHash;
+
+ /* Don't store 'long' passwords in the LM history,
+ but make sure to 'expire' one password off the other end */
+ if (lmNewHash) {
+ new_lmPwdHistory[0] = *lmNewHash;
+ } else {
+ ZERO_STRUCT(new_lmPwdHistory[0]);
+ }
+ lmPwdHistory_len = MIN(lmPwdHistory_len + 1, pwdHistoryLength);
+
+ if (ntNewHash) {
+ new_ntPwdHistory[0] = *ntNewHash;
+ } else {
+ ZERO_STRUCT(new_ntPwdHistory[0]);
+ }
+ ntPwdHistory_len = MIN(ntPwdHistory_len + 1, pwdHistoryLength);
CHECK_RET(samdb_msg_add_hashes(ctx, mem_ctx, mod,
"lmPwdHistory",
new_lmPwdHistory,
- MIN(pwdHistoryLength, lmPwdHistory_len+1)));
+ lmPwdHistory_len));
+
CHECK_RET(samdb_msg_add_hashes(ctx, mem_ctx, mod,
"ntPwdHistory",
new_ntPwdHistory,
- MIN(pwdHistoryLength, ntPwdHistory_len+1)));
-
+ ntPwdHistory_len));
return NT_STATUS_OK;
}
generated by cgit (git 2.34.1) at 2024-10-02 13:27:44 +0000