X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/0b20269724081a1107fbae9f979bc5db5d9403cc..df3d74568a92951341f3be036c199490f5e6d13f:/openbsd-compat/bsd-cygwin_util.c diff --git a/openbsd-compat/bsd-cygwin_util.c b/openbsd-compat/bsd-cygwin_util.c index 79ea907d..b408dde2 100644 --- a/openbsd-compat/bsd-cygwin_util.c +++ b/openbsd-compat/bsd-cygwin_util.c @@ -1,11 +1,25 @@ /* + * Copyright (c) 2000, 2001, Corinna Vinschen * - * cygwin_util.c + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. * - * Author: Corinna Vinschen - * - * Copyright (c) 2000 Corinna Vinschen , Duisburg, Germany - * All rights reserved + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Created: Sat Sep 02 12:17:00 2000 cv * @@ -15,67 +29,160 @@ #include "includes.h" -RCSID("$Id$"); - #ifdef HAVE_CYGWIN #include -#include #include +#include #include #include +#include "xmalloc.h" #define is_winnt (GetVersion() < 0x80000000) -int binary_open(const char *filename, int flags, mode_t mode) +#define ntsec_on(c) ((c) && strstr((c),"ntsec") && !strstr((c),"nontsec")) +#define ntsec_off(c) ((c) && strstr((c),"nontsec")) +#define ntea_on(c) ((c) && strstr((c),"ntea") && !strstr((c),"nontea")) + +#if defined(open) && open == binary_open +# undef open +#endif +#if defined(pipe) && open == binary_pipe +# undef pipe +#endif + +int +binary_open(const char *filename, int flags, ...) { - return open(filename, flags | O_BINARY, mode); + va_list ap; + mode_t mode; + + va_start(ap, flags); + mode = va_arg(ap, mode_t); + va_end(ap); + return (open(filename, flags | O_BINARY, mode)); } -int binary_pipe(int fd[2]) +int +binary_pipe(int fd[2]) { int ret = pipe(fd); if (!ret) { - setmode (fd[0], O_BINARY); - setmode (fd[1], O_BINARY); + setmode(fd[0], O_BINARY); + setmode(fd[1], O_BINARY); + } + return (ret); +} + +#define HAS_CREATE_TOKEN 1 +#define HAS_NTSEC_BY_DEFAULT 2 +#define HAS_CREATE_TOKEN_WO_NTSEC 3 + +static int +has_capability(int what) +{ + static int inited; + static int has_create_token; + static int has_ntsec_by_default; + static int has_create_token_wo_ntsec; + + /* + * has_capability() basically calls uname() and checks if + * specific capabilities of Cygwin can be evaluated from that. + * This simplifies the calling functions which only have to ask + * for a capability using has_capability() instead of having + * to figure that out by themselves. + */ + if (!inited) { + struct utsname uts; + + if (!uname(&uts)) { + int major_high = 0, major_low = 0, minor = 0; + int api_major_version = 0, api_minor_version = 0; + char *c; + + sscanf(uts.release, "%d.%d.%d", &major_high, + &major_low, &minor); + if ((c = strchr(uts.release, '(')) != NULL) { + sscanf(c + 1, "%d.%d", &api_major_version, + &api_minor_version); + } + if (major_high > 1 || + (major_high == 1 && (major_low > 3 || + (major_low == 3 && minor >= 2)))) + has_create_token = 1; + if (api_major_version > 0 || api_minor_version >= 56) + has_ntsec_by_default = 1; + if (major_high > 1 || + (major_high == 1 && major_low >= 5)) + has_create_token_wo_ntsec = 1; + inited = 1; + } + } + switch (what) { + case HAS_CREATE_TOKEN: + return (has_create_token); + case HAS_NTSEC_BY_DEFAULT: + return (has_ntsec_by_default); + case HAS_CREATE_TOKEN_WO_NTSEC: + return (has_create_token_wo_ntsec); } - return ret; + return (0); } -int check_nt_auth(int pwd_authenticated, uid_t uid) +int +check_nt_auth(int pwd_authenticated, struct passwd *pw) { /* * The only authentication which is able to change the user * context on NT systems is the password authentication. So * we deny all requsts for changing the user context if another * authentication method is used. - * This may change in future when a special openssh - * subauthentication package is available. + * + * This doesn't apply to Cygwin versions >= 1.3.2 anymore which + * uses the undocumented NtCreateToken() call to create a user + * token if the process has the appropriate privileges and if + * CYGWIN ntsec setting is on. */ - if (is_winnt && !pwd_authenticated && geteuid() != uid) + static int has_create_token = -1; + + if (pw == NULL) return 0; - - return 1; + if (is_winnt) { + if (has_create_token < 0) { + char *cygwin = getenv("CYGWIN"); + + has_create_token = 0; + if (has_capability(HAS_CREATE_TOKEN) && + (ntsec_on(cygwin) || + (has_capability(HAS_NTSEC_BY_DEFAULT) && + !ntsec_off(cygwin)) || + has_capability(HAS_CREATE_TOKEN_WO_NTSEC))) + has_create_token = 1; + } + if (has_create_token < 1 && + !pwd_authenticated && geteuid() != pw->pw_uid) + return (0); + } + return (1); } -int check_ntsec(const char *filename) +int +check_ntsec(const char *filename) { char *cygwin; - int allow_ntea = 0; - int allow_ntsec = 0; + int allow_ntea = 0, allow_ntsec = 0; struct statfs fsstat; /* Windows 95/98/ME don't support file system security at all. */ if (!is_winnt) - return 0; + return (0); /* Evaluate current CYGWIN settings. */ - if ((cygwin = getenv("CYGWIN")) != NULL) { - if (strstr(cygwin, "ntea") && !strstr(cygwin, "nontea")) - allow_ntea = 1; - if (strstr(cygwin, "ntsec") && !strstr(cygwin, "nontsec")) - allow_ntsec = 1; - } + cygwin = getenv("CYGWIN"); + allow_ntea = ntea_on(cygwin); + allow_ntsec = ntsec_on(cygwin) || + (has_capability(HAS_NTSEC_BY_DEFAULT) && !ntsec_off(cygwin)); /* * `ntea' is an emulation of POSIX attributes. It doesn't support @@ -84,14 +191,14 @@ int check_ntsec(const char *filename) * for security checks. */ if (allow_ntea) - return 1; + return (1); /* * Retrieve file system flags. In Cygwin, file system flags are * copied to f_type which has no meaning in Win32 itself. */ if (statfs(filename, &fsstat)) - return 1; + return (1); /* * Only file systems supporting ACLs are able to set permissions. @@ -99,9 +206,83 @@ int check_ntsec(const char *filename) * ACLs to support POSIX permissions on files. */ if (fsstat.f_type & FS_PERSISTENT_ACLS) - return allow_ntsec; + return (allow_ntsec); + + return (0); +} + +void +register_9x_service(void) +{ + HINSTANCE kerneldll; + DWORD (*RegisterServiceProcess)(DWORD, DWORD); + + /* The service register mechanism in 9x/Me is pretty different from + * NT/2K/XP. In NT/2K/XP we're using a special service starter + * application to register and control sshd as service. This method + * doesn't play nicely with 9x/Me. For that reason we register here + * as service when running under 9x/Me. This function is only called + * by the child sshd when it's going to daemonize. + */ + if (is_winnt) + return; + if (!(kerneldll = LoadLibrary("KERNEL32.DLL"))) + return; + if (!(RegisterServiceProcess = (DWORD (*)(DWORD, DWORD)) + GetProcAddress(kerneldll, "RegisterServiceProcess"))) + return; + RegisterServiceProcess(0, 1); +} - return 0; +#define NL(x) x, (sizeof (x) - 1) +#define WENV_SIZ (sizeof (wenv_arr) / sizeof (wenv_arr[0])) + +static struct wenv { + const char *name; + size_t namelen; +} wenv_arr[] = { + { NL("ALLUSERSPROFILE=") }, + { NL("COMMONPROGRAMFILES=") }, + { NL("COMPUTERNAME=") }, + { NL("COMSPEC=") }, + { NL("CYGWIN=") }, + { NL("NUMBER_OF_PROCESSORS=") }, + { NL("OS=") }, + { NL("PATH=") }, + { NL("PATHEXT=") }, + { NL("PROCESSOR_ARCHITECTURE=") }, + { NL("PROCESSOR_IDENTIFIER=") }, + { NL("PROCESSOR_LEVEL=") }, + { NL("PROCESSOR_REVISION=") }, + { NL("PROGRAMFILES=") }, + { NL("SYSTEMDRIVE=") }, + { NL("SYSTEMROOT=") }, + { NL("TMP=") }, + { NL("TEMP=") }, + { NL("WINDIR=") } +}; + +char ** +fetch_windows_environment(void) +{ + char **e, **p; + unsigned int i, idx = 0; + + p = xcalloc(WENV_SIZ + 1, sizeof(char *)); + for (e = environ; *e != NULL; ++e) { + for (i = 0; i < WENV_SIZ; ++i) { + if (!strncmp(*e, wenv_arr[i].name, wenv_arr[i].namelen)) + p[idx++] = *e; + } + } + p[idx] = NULL; + return p; +} + +void +free_windows_environment(char **p) +{ + xfree(p); } #endif /* HAVE_CYGWIN */