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authorVolker Lendecke <vl@samba.org>2011-02-05 14:42:01 +0100
committerVolker Lendecke <vl@samba.org>2011-02-06 16:44:56 +0100
commit843825f56728a6cec2b0b00cc32f97b4b05b3ea8 (patch)
tree9afef591617b96d8c7aa056e6d17808cbdd65124
parent8c367162f09c7772091a80d8426de6bead0c030d (diff)
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s3: Fetch the machinepw via ldapi in pdb_ads
-rw-r--r--source3/auth/auth_netlogond.c153
1 files changed, 112 insertions, 41 deletions
diff --git a/source3/auth/auth_netlogond.c b/source3/auth/auth_netlogond.c
index 1e3ccb1189..cff36a535d 100644
--- a/source3/auth/auth_netlogond.c
+++ b/source3/auth/auth_netlogond.c
@@ -22,6 +22,8 @@
#include "../librpc/gen_ndr/ndr_netlogon.h"
#include "rpc_client/cli_netlogon.h"
#include "secrets.h"
+#include "tldap.h"
+#include "tldap_util.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
@@ -107,51 +109,125 @@ static NTSTATUS netlogond_validate(TALLOC_CTX *mem_ctx,
return NT_STATUS_OK;
}
-static char *mymachinepw(TALLOC_CTX *mem_ctx)
+static NTSTATUS get_ldapi_ctx(TALLOC_CTX *mem_ctx, struct tldap_context **pld)
{
- fstring pwd;
- const char *script;
- char *to_free = NULL;
- ssize_t nread;
- int ret, fd;
-
- script = lp_parm_const_string(
- GLOBAL_SECTION_SNUM, "auth_netlogond", "machinepwscript",
- NULL);
-
- if (script == NULL) {
- to_free = talloc_asprintf(talloc_tos(), "%s/%s",
- get_dyn_SBINDIR(), "mymachinepw");
- script = to_free;
- }
- if (script == NULL) {
- return NULL;
+ struct tldap_context *ld;
+ struct sockaddr_un addr;
+ char *sockaddr;
+ int fd;
+ NTSTATUS status;
+ int res;
+
+ sockaddr = talloc_asprintf(talloc_tos(), "/%s/ldap_priv/ldapi",
+ lp_private_dir());
+ if (sockaddr == NULL) {
+ DEBUG(10, ("talloc failed\n"));
+ return NT_STATUS_NO_MEMORY;
}
- ret = smbrun(script, &fd);
- DEBUG(ret ? 0 : 3, ("mymachinepw: Running the command `%s' gave %d\n",
- script, ret));
- TALLOC_FREE(to_free);
+ ZERO_STRUCT(addr);
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, sockaddr, sizeof(addr.sun_path));
+ TALLOC_FREE(sockaddr);
- if (ret != 0) {
- return NULL;
+ status = open_socket_out((struct sockaddr_storage *)(void *)&addr,
+ 0, 0, &fd);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("Could not connect to %s: %s\n", addr.sun_path,
+ nt_errstr(status)));
+ return status;
}
+ set_blocking(fd, false);
- nread = read(fd, pwd, sizeof(pwd)-1);
- close(fd);
+ ld = tldap_context_create(mem_ctx, fd);
+ if (ld == NULL) {
+ close(fd);
+ return NT_STATUS_NO_MEMORY;
+ }
+ res = tldap_fetch_rootdse(ld);
+ if (res != TLDAP_SUCCESS) {
+ DEBUG(10, ("tldap_fetch_rootdse failed: %s\n",
+ tldap_errstr(talloc_tos(), ld, res)));
+ TALLOC_FREE(ld);
+ return NT_STATUS_LDAP(res);
+ }
+ *pld = ld;
+ return NT_STATUS_OK;;
+}
+
+static NTSTATUS mymachinepw(uint8_t pwd[16])
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct tldap_context *ld;
+ struct tldap_message *rootdse, **msg;
+ const char *attrs[1] = { "unicodePwd" };
+ char *default_nc, *myname;
+ int rc, num_msg;
+ DATA_BLOB pwdblob;
+ NTSTATUS status;
- if (nread <= 0) {
- DEBUG(3, ("mymachinepwd: Could not read password\n"));
- return NULL;
+ status = get_ldapi_ctx(talloc_tos(), &ld);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+ rootdse = tldap_rootdse(ld);
+ if (rootdse == NULL) {
+ DEBUG(10, ("Could not get rootdse\n"));
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto fail;
+ }
+ default_nc = tldap_talloc_single_attribute(
+ rootdse, "defaultNamingContext", talloc_tos());
+ if (default_nc == NULL) {
+ DEBUG(10, ("Could not get defaultNamingContext\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
}
+ DEBUG(10, ("default_nc = %s\n", default_nc));
- pwd[nread] = '\0';
+ myname = talloc_asprintf_strupper_m(talloc_tos(), "%s$",
+ global_myname());
+ if (myname == NULL) {
+ DEBUG(10, ("talloc failed\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
- if (pwd[nread-1] == '\n') {
- pwd[nread-1] = '\0';
+ rc = tldap_search_fmt(
+ ld, default_nc, TLDAP_SCOPE_SUB, attrs, ARRAY_SIZE(attrs), 0,
+ talloc_tos(), &msg,
+ "(&(sAMAccountName=%s)(objectClass=computer))", myname);
+ if (rc != TLDAP_SUCCESS) {
+ DEBUG(10, ("Could not retrieve our account: %s\n",
+ tldap_errstr(talloc_tos(), ld, rc)));
+ status = NT_STATUS_LDAP(rc);
+ goto fail;
+ }
+ num_msg = talloc_array_length(msg);
+ if (num_msg != 1) {
+ DEBUG(10, ("Got %d accounts, expected one\n", num_msg));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto fail;
+ }
+ if (!tldap_get_single_valueblob(msg[0], "unicodePwd", &pwdblob)) {
+ char *dn = NULL;
+ tldap_entry_dn(msg[0], &dn);
+ DEBUG(10, ("No unicodePwd attribute in %s\n",
+ dn ? dn : "<unknown DN>"));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto fail;
}
+ if (pwdblob.length != 16) {
+ DEBUG(10, ("Password hash hash has length %d, expected 16\n",
+ (int)pwdblob.length));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto fail;
+ }
+ memcpy(pwd, pwdblob.data, 16);
- return talloc_strdup(mem_ctx, pwd);
+fail:
+ TALLOC_FREE(frame);
+ return status;
}
static NTSTATUS check_netlogond_security(const struct auth_context *auth_context,
@@ -165,7 +241,6 @@ static NTSTATUS check_netlogond_security(const struct auth_context *auth_context
struct rpc_pipe_client *p = NULL;
struct pipe_auth_data *auth = NULL;
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
- char *plaintext_machinepw = NULL;
uint8_t machine_password[16];
uint8_t schannel_key[16];
NTSTATUS schannel_bind_result, status;
@@ -241,16 +316,12 @@ static NTSTATUS check_netlogond_security(const struct auth_context *auth_context
goto done;
}
- plaintext_machinepw = mymachinepw(talloc_tos());
- if (plaintext_machinepw == NULL) {
- status = NT_STATUS_NO_MEMORY;
+ status = mymachinepw(machine_password);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("mymachinepw failed: %s\n", nt_errstr(status)));
goto done;
}
- E_md4hash(plaintext_machinepw, machine_password);
-
- TALLOC_FREE(plaintext_machinepw);
-
status = rpccli_netlogon_setup_creds(
p, global_myname(), lp_workgroup(), global_myname(),
global_myname(), machine_password, SEC_CHAN_BDC, &neg_flags);