mirror of
https://github.com/samba-team/samba.git
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b5e734b4ca
Andrew Bartlett
(This used to be commit ee9a93688d
)
340 lines
9.6 KiB
C
340 lines
9.6 KiB
C
/*
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Unix SMB/CIFS implementation.
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User credentials handling (as regards on-disk files)
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Copyright (C) Jelmer Vernooij 2005
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Copyright (C) Tim Potter 2001
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "lib/ldb/include/ldb.h"
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#include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
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#include "include/secrets.h"
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#include "system/filesys.h"
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/**
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* Read a file descriptor, and parse it for a password (eg from a file or stdin)
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*
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* @param credentials Credentials structure on which to set the password
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* @param fd open file descriptor to read the password from
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* @param obtained This enum describes how 'specified' this password is
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*/
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BOOL cli_credentials_parse_password_fd(struct cli_credentials *credentials,
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int fd, enum credentials_obtained obtained)
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{
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char *p;
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char pass[128];
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for(p = pass, *p = '\0'; /* ensure that pass is null-terminated */
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p && p - pass < sizeof(pass);) {
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switch (read(fd, p, 1)) {
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case 1:
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if (*p != '\n' && *p != '\0') {
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*++p = '\0'; /* advance p, and null-terminate pass */
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break;
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}
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case 0:
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if (p - pass) {
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*p = '\0'; /* null-terminate it, just in case... */
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p = NULL; /* then force the loop condition to become false */
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break;
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} else {
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fprintf(stderr, "Error reading password from file descriptor %d: %s\n", fd, "empty password\n");
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return False;
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}
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default:
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fprintf(stderr, "Error reading password from file descriptor %d: %s\n",
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fd, strerror(errno));
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return False;
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}
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}
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cli_credentials_set_password(credentials, pass, obtained);
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return True;
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}
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/**
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* Read a named file, and parse it for a password
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*
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* @param credentials Credentials structure on which to set the password
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* @param file a named file to read the password from
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* @param obtained This enum describes how 'specified' this password is
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*/
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BOOL cli_credentials_parse_password_file(struct cli_credentials *credentials, const char *file, enum credentials_obtained obtained)
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{
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int fd = open(file, O_RDONLY, 0);
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BOOL ret;
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if (fd < 0) {
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fprintf(stderr, "Error opening PASSWD_FILE %s: %s\n",
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file, strerror(errno));
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return False;
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}
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ret = cli_credentials_parse_password_fd(credentials, fd, obtained);
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close(fd);
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return ret;
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}
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/**
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* Read a named file, and parse it for username, domain, realm and password
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*
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* @param credentials Credentials structure on which to set the password
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* @param file a named file to read the details from
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* @param obtained This enum describes how 'specified' this password is
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*/
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BOOL cli_credentials_parse_file(struct cli_credentials *cred, const char *file, enum credentials_obtained obtained)
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{
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uint16_t len = 0;
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char *ptr, *val, *param;
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char **lines;
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int i, numlines;
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lines = file_lines_load(file, &numlines, NULL);
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if (lines == NULL)
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{
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/* fail if we can't open the credentials file */
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d_printf("ERROR: Unable to open credentials file!\n");
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return False;
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}
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for (i = 0; i < numlines; i++) {
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len = strlen(lines[i]);
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if (len == 0)
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continue;
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/* break up the line into parameter & value.
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* will need to eat a little whitespace possibly */
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param = lines[i];
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if (!(ptr = strchr_m (lines[i], '=')))
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continue;
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val = ptr+1;
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*ptr = '\0';
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/* eat leading white space */
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while ((*val!='\0') && ((*val==' ') || (*val=='\t')))
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val++;
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if (strwicmp("password", param) == 0) {
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cli_credentials_set_password(cred, val, obtained);
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} else if (strwicmp("username", param) == 0) {
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cli_credentials_set_username(cred, val, obtained);
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} else if (strwicmp("domain", param) == 0) {
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cli_credentials_set_domain(cred, val, obtained);
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} else if (strwicmp("realm", param) == 0) {
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cli_credentials_set_realm(cred, val, obtained);
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}
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memset(lines[i], 0, len);
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}
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talloc_free(lines);
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return True;
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}
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/**
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* Fill in credentials for the machine trust account, from the secrets database.
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*
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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*/
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static NTSTATUS cli_credentials_set_secrets(struct cli_credentials *cred,
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const char *base,
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const char *filter)
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{
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TALLOC_CTX *mem_ctx;
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struct ldb_context *ldb;
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int ldb_ret;
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struct ldb_message **msgs;
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const char *attrs[] = {
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"secret",
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"priorSecret",
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"samAccountName",
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"flatname",
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"realm",
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"secureChannelType",
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"ntPwdHash",
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"msDS-KeyVersionNumber",
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NULL
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};
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const char *machine_account;
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const char *password;
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const char *old_password;
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const char *domain;
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const char *realm;
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enum netr_SchannelType sct;
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/* ok, we are going to get it now, don't recurse back here */
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cred->machine_account_pending = False;
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mem_ctx = talloc_named(cred, 0, "cli_credentials fetch machine password");
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/* Local secrets are stored in secrets.ldb */
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ldb = secrets_db_connect(mem_ctx);
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if (!ldb) {
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DEBUG(1, ("Could not open secrets.ldb\n"));
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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}
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/* search for the secret record */
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ldb_ret = gendb_search(ldb,
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mem_ctx, ldb_dn_explode(mem_ctx, base),
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&msgs, attrs,
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"%s", filter);
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if (ldb_ret == 0) {
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DEBUG(1, ("Could not find join record to domain: %s\n",
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cli_credentials_get_domain(cred)));
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talloc_free(mem_ctx);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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} else if (ldb_ret != 1) {
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DEBUG(1, ("Found more than one (%d) join records to domain: %s\n",
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ldb_ret, cli_credentials_get_domain(cred)));
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talloc_free(mem_ctx);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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}
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password = ldb_msg_find_string(msgs[0], "secret", NULL);
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old_password = ldb_msg_find_string(msgs[0], "priorSecret", NULL);
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machine_account = ldb_msg_find_string(msgs[0], "samAccountName", NULL);
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if (!machine_account) {
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DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
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cli_credentials_get_domain(cred)));
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talloc_free(mem_ctx);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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}
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sct = ldb_msg_find_int(msgs[0], "secureChannelType", 0);
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if (sct) {
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cli_credentials_set_secure_channel_type(cred, sct);
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}
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if (!password) {
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const struct ldb_val *nt_password_hash = ldb_msg_find_ldb_val(msgs[0], "ntPwdHash");
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struct samr_Password hash;
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ZERO_STRUCT(hash);
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if (nt_password_hash) {
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memcpy(hash.hash, nt_password_hash->data,
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MIN(nt_password_hash->length, sizeof(hash.hash)));
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cli_credentials_set_nt_hash(cred, &hash, CRED_SPECIFIED);
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} else {
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DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
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cli_credentials_get_domain(cred)));
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talloc_free(mem_ctx);
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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}
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}
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domain = ldb_msg_find_string(msgs[0], "flatname", NULL);
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if (domain) {
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cli_credentials_set_domain(cred, domain, CRED_SPECIFIED);
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}
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realm = ldb_msg_find_string(msgs[0], "realm", NULL);
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if (realm) {
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cli_credentials_set_realm(cred, realm, CRED_SPECIFIED);
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}
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cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED);
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if (password) {
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cli_credentials_set_password(cred, password, CRED_SPECIFIED);
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}
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cli_credentials_set_kvno(cred, ldb_msg_find_int(msgs[0], "msDS-KeyVersionNumber", 0));
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talloc_free(mem_ctx);
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return NT_STATUS_OK;
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}
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/**
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* Fill in credentials for the machine trust account, from the secrets database.
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*
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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*/
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NTSTATUS cli_credentials_set_machine_account(struct cli_credentials *cred)
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{
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char *filter = talloc_asprintf(cred, SECRETS_PRIMARY_DOMAIN_FILTER,
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cli_credentials_get_domain(cred));
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return cli_credentials_set_secrets(cred, SECRETS_PRIMARY_DOMAIN_DN,
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filter);
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}
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/**
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* Fill in credentials for the machine trust account, from the secrets database.
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*
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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*/
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NTSTATUS cli_credentials_set_krbtgt(struct cli_credentials *cred)
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{
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char *filter = talloc_asprintf(cred, SECRETS_KRBTGT_SEARCH,
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cli_credentials_get_realm(cred),
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cli_credentials_get_domain(cred));
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return cli_credentials_set_secrets(cred, SECRETS_PRINCIPALS_DN,
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filter);
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}
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/**
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* Fill in credentials for the machine trust account, from the secrets database.
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*
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* @param cred Credentials structure to fill in
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* @retval NTSTATUS error detailing any failure
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*/
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NTSTATUS cli_credentials_set_stored_principal(struct cli_credentials *cred,
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const char *serviceprincipal)
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{
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char *filter = talloc_asprintf(cred, SECRETS_PRINCIPAL_SEARCH,
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cli_credentials_get_realm(cred),
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cli_credentials_get_domain(cred),
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serviceprincipal);
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return cli_credentials_set_secrets(cred, SECRETS_PRINCIPALS_DN,
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filter);
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}
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/**
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* Ask that when required, the credentials system will be filled with
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* machine trust account, from the secrets database.
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*
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* @param cred Credentials structure to fill in
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* @note This function is used to call the above function after, rather
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* than during, popt processing.
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*
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*/
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void cli_credentials_set_machine_account_pending(struct cli_credentials *cred)
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{
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cred->machine_account_pending = True;
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}
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