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6f73359133
the loop entry condition.
Andrew Bartlett
(This used to be commit c118275131
)
347 lines
8.5 KiB
C
347 lines
8.5 KiB
C
/*
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Unix SMB/CIFS implementation.
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smbpasswd file format routines
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Copyright (C) Andrew Tridgell 1992-1998
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Modified by Jeremy Allison 1995.
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Modified by Gerald (Jerry) Carter 2000-2001
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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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Copyright (C) Jelmer Vernooij <jelmer@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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/*! \file lib/smbpasswd.c
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The smbpasswd file is used to store encrypted passwords in a similar
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fashion to the /etc/passwd file. The format is colon separated fields
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with one user per line like so:
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<username>:<uid>:<lanman hash>:<nt hash>:<acb info>:<last change time>
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The username and uid must correspond to an entry in the /etc/passwd
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file. The lanman and nt password hashes are 32 hex digits corresponding
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to the 16-byte lanman and nt hashes respectively.
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The password last change time is stored as a string of the format
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LCD-<change time> where the change time is expressed as an
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'N' No password
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'D' Disabled
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'H' Homedir required
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'T' Temp account.
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'U' User account (normal)
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'M' MNS logon user account - what is this ?
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'W' Workstation account
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'S' Server account
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'L' Locked account
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'X' No Xpiry on password
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'I' Interdomain trust account
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*/
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#include "includes.h"
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#include "system/locale.h"
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#include "lib/samba3/samba3.h"
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/*! Convert 32 hex characters into a 16 byte array. */
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struct samr_Password *smbpasswd_gethexpwd(TALLOC_CTX *mem_ctx, const char *p)
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{
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int i;
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unsigned char lonybble, hinybble;
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const char *hexchars = "0123456789ABCDEF";
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const char *p1, *p2;
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struct samr_Password *pwd = talloc(mem_ctx, struct samr_Password);
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if (!p) return NULL;
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for (i = 0; i < (sizeof(pwd->hash) * 2); i += 2)
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{
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hinybble = toupper(p[i]);
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lonybble = toupper(p[i + 1]);
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p1 = strchr_m(hexchars, hinybble);
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p2 = strchr_m(hexchars, lonybble);
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if (!p1 || !p2) {
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return NULL;
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}
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hinybble = PTR_DIFF(p1, hexchars);
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lonybble = PTR_DIFF(p2, hexchars);
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pwd->hash[i / 2] = (hinybble << 4) | lonybble;
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}
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return pwd;
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}
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/*! Convert a 16-byte array into 32 hex characters. */
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struct samr_Password *lm_hash_p = NULL;
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struct samr_Password *nt_hash_p = NULL;
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char *smbpasswd_sethexpwd(TALLOC_CTX *mem_ctx, struct samr_Password *pwd, uint16_t acb_info)
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{
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char *p;
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if (pwd != NULL) {
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int i;
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p = talloc_array(mem_ctx, char, 33);
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if (!p) {
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return NULL;
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}
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for (i = 0; i < sizeof(pwd->hash); i++)
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slprintf(&p[i*2], 3, "%02X", pwd->hash[i]);
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} else {
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if (acb_info & ACB_PWNOTREQ)
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p = talloc_strdup(mem_ctx, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
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else
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p = talloc_strdup(mem_ctx, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
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}
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return p;
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}
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/*! Decode the account control bits (ACB) info from a string. */
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uint16_t smbpasswd_decode_acb_info(const char *p)
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{
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uint16_t acb_info = 0;
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BOOL finished = False;
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/*
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* Check if the account type bits have been encoded after the
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* NT password (in the form [NDHTUWSLXI]).
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*/
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if (*p != '[') return 0;
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for (p++; *p && !finished; p++)
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{
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switch (*p) {
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case 'N': /* 'N'o password. */
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acb_info |= ACB_PWNOTREQ;
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break;
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case 'D': /* 'D'isabled. */
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acb_info |= ACB_DISABLED;
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break;
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case 'H': /* 'H'omedir required. */
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acb_info |= ACB_HOMDIRREQ;
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break;
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case 'T': /* 'T'emp account. */
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acb_info |= ACB_TEMPDUP;
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break;
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case 'U': /* 'U'ser account (normal). */
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acb_info |= ACB_NORMAL;
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break;
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case 'M': /* 'M'NS logon user account. What is this ? */
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acb_info |= ACB_MNS;
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break;
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case 'W': /* 'W'orkstation account. */
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acb_info |= ACB_WSTRUST;
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break;
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case 'S': /* 'S'erver account. */
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acb_info |= ACB_SVRTRUST;
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break;
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case 'L': /* 'L'ocked account. */
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acb_info |= ACB_AUTOLOCK;
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break;
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case 'X': /* No 'X'piry on password */
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acb_info |= ACB_PWNOEXP;
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break;
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case 'I': /* 'I'nterdomain trust account. */
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acb_info |= ACB_DOMTRUST;
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break;
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case ' ':
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break;
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case ':':
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case '\n':
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case ']':
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default:
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finished = True;
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break;
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}
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}
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return acb_info;
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}
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/*! Encode account control bits (ACBs) into a string. */
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char *smbpasswd_encode_acb_info(TALLOC_CTX *mem_ctx, uint16_t acb_info)
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{
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char *acct_str = talloc_array(mem_ctx, char, 35);
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size_t i = 0;
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acct_str[i++] = '[';
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if (acb_info & ACB_PWNOTREQ ) acct_str[i++] = 'N';
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if (acb_info & ACB_DISABLED ) acct_str[i++] = 'D';
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if (acb_info & ACB_HOMDIRREQ) acct_str[i++] = 'H';
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if (acb_info & ACB_TEMPDUP ) acct_str[i++] = 'T';
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if (acb_info & ACB_NORMAL ) acct_str[i++] = 'U';
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if (acb_info & ACB_MNS ) acct_str[i++] = 'M';
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if (acb_info & ACB_WSTRUST ) acct_str[i++] = 'W';
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if (acb_info & ACB_SVRTRUST ) acct_str[i++] = 'S';
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if (acb_info & ACB_AUTOLOCK ) acct_str[i++] = 'L';
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if (acb_info & ACB_PWNOEXP ) acct_str[i++] = 'X';
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if (acb_info & ACB_DOMTRUST ) acct_str[i++] = 'I';
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acct_str[i++] = ']';
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acct_str[i++] = '\0';
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return acct_str;
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}
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NTSTATUS samba3_read_smbpasswd(const char *filename, TALLOC_CTX *ctx, struct samba3_samaccount **accounts, uint32_t *count)
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{
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int numlines;
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char **lines;
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int i;
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*count = 0;
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*accounts = NULL;
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lines = file_lines_load(filename, &numlines, ctx);
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if (lines == NULL) {
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DEBUG(0, ("Unable to load lines from %s\n", filename));
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return NT_STATUS_UNSUCCESSFUL;
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}
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*accounts = talloc_array(ctx, struct samba3_samaccount, numlines);
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for (i = 0; i < numlines; i++) {
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char *p = lines[i], *q;
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uid_t uid;
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struct samba3_samaccount *acc = &((*accounts)[*count]);
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if (p[0] == '\0' || p[0] == '#')
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continue;
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ZERO_STRUCTP(acc);
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q = strchr(p, ':');
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if (!q) {
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DEBUG(0, ("%s:%d: expected ':'\n", filename, i));
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continue;
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}
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acc->username = talloc_strndup(ctx, p, PTR_DIFF(q, p));
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p = q+1;
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uid = atoi(p);
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/* uid is ignored here.. */
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q = strchr(p, ':');
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if (!q) {
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DEBUG(0, ("%s:%d: expected ':'\n", filename, i));
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continue;
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}
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p = q+1;
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if (strlen(p) < 33) {
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DEBUG(0, ("%s:%d: expected 32 byte password blob\n", filename, i));
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continue;
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}
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if (!strncmp(p, "NO PASSWORD", strlen("NO PASSWORD"))) {
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acc->acct_ctrl |= ACB_PWNOTREQ;
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} else if (p[0] == '*' || p[0] == 'X') {
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/* No password set */
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} else {
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struct samr_Password *pw = smbpasswd_gethexpwd(*accounts, p);
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if (!pw) {
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DEBUG(0, ("%s:%d: Malformed LM pw entry\n", filename, i));
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continue;
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}
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memcpy(acc->lm_pw.hash, pw, sizeof(*pw));
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}
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if (p[32] != ':') {
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DEBUG(0, ("%s:%d: expected ':' after 32 byte password blob\n", filename, i));
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continue;
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}
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p += 33;
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if (p[0] == '*' || p[0] == 'X') {
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/* No password set */
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} else {
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struct samr_Password *pw = smbpasswd_gethexpwd(*accounts, p);
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if (!pw) {
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DEBUG(0, ("%s:%d: Malformed LM pw entry\n", filename, i));
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continue;
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}
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memcpy(acc->nt_pw.hash, pw, sizeof(*pw));
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}
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if (p[32] != ':') {
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DEBUG(0, ("%s:%d: expected ':' after 32 byte password blob\n", filename, i));
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continue;
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}
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p += 33;
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if (p[0] == '[') {
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q = strchr(p, ']');
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if (!q) {
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DEBUG(0, ("%s:%d: expected ']'\n", filename, i));
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continue;
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}
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acc->acct_ctrl |= smbpasswd_decode_acb_info(p);
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p = q+1;
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if (p[0] == ':' && strncmp(p, "LCT-", 4) == 0) {
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int j;
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p += 4;
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for(j = 0; j < 8; j++) {
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if(p[j] == '\0' || !isxdigit(p[j])) {
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break;
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}
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}
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if(i == 8) {
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acc->pass_last_set_time = (time_t)strtol((char *)p, NULL, 16);
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}
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}
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} else {
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/* 'Old' style file. Fake up based on user name. */
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/*
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* Currently trust accounts are kept in the same
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* password file as 'normal accounts'. If this changes
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* we will have to fix this code. JRA.
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*/
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if(acc->username[strlen(acc->username) - 1] == '$') {
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acc->acct_ctrl &= ~ACB_NORMAL;
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acc->acct_ctrl |= ACB_WSTRUST;
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}
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}
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(*count)++;
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}
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talloc_free(lines);
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return NT_STATUS_OK;
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}
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