X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/939395a800652e2164a5426d3ba2ba3322eb8526..a749079eca39b446ab008a25492fc1520d98b840:/windows/winmisc.c diff --git a/windows/winmisc.c b/windows/winmisc.c index b9214043..c719c726 100644 --- a/windows/winmisc.c +++ b/windows/winmisc.c @@ -5,64 +5,138 @@ #include #include #include "putty.h" +#include OSVERSIONINFO osVersion; -void platform_get_x11_auth(char *display, int *proto, - unsigned char *data, int *datalen) -{ - /* We don't support this at all under Windows. */ -} - -const char platform_x11_best_transport[] = "localhost"; - char *platform_get_x_display(void) { /* We may as well check for DISPLAY in case it's useful. */ return dupstr(getenv("DISPLAY")); } -Filename filename_from_str(const char *str) +Filename *filename_from_str(const char *str) { - Filename ret; - strncpy(ret.path, str, sizeof(ret.path)); - ret.path[sizeof(ret.path)-1] = '\0'; + Filename *ret = snew(Filename); + ret->path = dupstr(str); return ret; } +Filename *filename_copy(const Filename *fn) +{ + return filename_from_str(fn->path); +} + const char *filename_to_str(const Filename *fn) { return fn->path; } -int filename_equal(Filename f1, Filename f2) +int filename_equal(const Filename *f1, const Filename *f2) +{ + return !strcmp(f1->path, f2->path); +} + +int filename_is_null(const Filename *fn) +{ + return !*fn->path; +} + +void filename_free(Filename *fn) { - return !strcmp(f1.path, f2.path); + sfree(fn->path); + sfree(fn); } -int filename_is_null(Filename fn) +int filename_serialise(const Filename *f, void *vdata) +{ + char *data = (char *)vdata; + int len = strlen(f->path) + 1; /* include trailing NUL */ + if (data) { + strcpy(data, f->path); + } + return len; +} +Filename *filename_deserialise(void *vdata, int maxsize, int *used) { - return !*fn.path; + char *data = (char *)vdata; + char *end; + end = memchr(data, '\0', maxsize); + if (!end) + return NULL; + end++; + *used = end - data; + return filename_from_str(data); } +#ifndef NO_SECUREZEROMEMORY +/* + * Windows implementation of smemclr (see misc.c) using SecureZeroMemory. + */ +void smemclr(void *b, size_t n) { + if (b && n > 0) + SecureZeroMemory(b, n); +} +#endif + char *get_username(void) { DWORD namelen; char *user; + int got_username = FALSE; + DECL_WINDOWS_FUNCTION(static, BOOLEAN, GetUserNameExA, + (EXTENDED_NAME_FORMAT, LPSTR, PULONG)); + + { + static int tried_usernameex = FALSE; + if (!tried_usernameex) { + /* Not available on Win9x, so load dynamically */ + HMODULE secur32 = load_system32_dll("secur32.dll"); + GET_WINDOWS_FUNCTION(secur32, GetUserNameExA); + tried_usernameex = TRUE; + } + } - namelen = 0; - if (GetUserName(NULL, &namelen) == FALSE) { + if (p_GetUserNameExA) { /* - * Apparently this doesn't work at least on Windows XP SP2. - * Thus assume a maximum of 256. It will fail again if it - * doesn't fit. + * If available, use the principal -- this avoids the problem + * that the local username is case-insensitive but Kerberos + * usernames are case-sensitive. */ - namelen = 256; + + /* Get the length */ + namelen = 0; + (void) p_GetUserNameExA(NameUserPrincipal, NULL, &namelen); + + user = snewn(namelen, char); + got_username = p_GetUserNameExA(NameUserPrincipal, user, &namelen); + if (got_username) { + char *p = strchr(user, '@'); + if (p) *p = 0; + } else { + sfree(user); + } } - user = snewn(namelen, char); - GetUserName(user, &namelen); + if (!got_username) { + /* Fall back to local user name */ + namelen = 0; + if (GetUserName(NULL, &namelen) == FALSE) { + /* + * Apparently this doesn't work at least on Windows XP SP2. + * Thus assume a maximum of 256. It will fail again if it + * doesn't fit. + */ + namelen = 256; + } + + user = snewn(namelen, char); + got_username = GetUserName(user, &namelen); + if (!got_username) { + sfree(user); + } + } - return user; + return got_username ? user : NULL; } BOOL init_winver(void) @@ -72,6 +146,96 @@ BOOL init_winver(void) return GetVersionEx ( (OSVERSIONINFO *) &osVersion); } +HMODULE load_system32_dll(const char *libname) +{ + /* + * Wrapper function to load a DLL out of c:\windows\system32 + * without going through the full DLL search path. (Hence no + * attack is possible by placing a substitute DLL earlier on that + * path.) + */ + static char *sysdir = NULL; + char *fullpath; + HMODULE ret; + + if (!sysdir) { + int size = 0, len; + do { + size = 3*size/2 + 512; + sysdir = sresize(sysdir, size, char); + len = GetSystemDirectory(sysdir, size); + } while (len >= size); + } + + fullpath = dupcat(sysdir, "\\", libname, NULL); + ret = LoadLibrary(fullpath); + sfree(fullpath); + return ret; +} + +/* + * A tree234 containing mappings from system error codes to strings. + */ + +struct errstring { + int error; + char *text; +}; + +static int errstring_find(void *av, void *bv) +{ + int *a = (int *)av; + struct errstring *b = (struct errstring *)bv; + if (*a < b->error) + return -1; + if (*a > b->error) + return +1; + return 0; +} +static int errstring_compare(void *av, void *bv) +{ + struct errstring *a = (struct errstring *)av; + return errstring_find(&a->error, bv); +} + +static tree234 *errstrings = NULL; + +const char *win_strerror(int error) +{ + struct errstring *es; + + if (!errstrings) + errstrings = newtree234(errstring_compare); + + es = find234(errstrings, &error, errstring_find); + + if (!es) { + int bufsize; + + es = snew(struct errstring); + es->error = error; + /* maximum size for FormatMessage is 64K */ + bufsize = 65535; + es->text = snewn(bufsize, char); + if (!FormatMessage((FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS), NULL, error, + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + es->text, bufsize, NULL)) { + sprintf(es->text, + "Windows error code %d (and FormatMessage returned %d)", + error, GetLastError()); + } else { + int len = strlen(es->text); + if (len > 0 && es->text[len-1] == '\n') + es->text[len-1] = '\0'; + } + es->text = sresize(es->text, strlen(es->text) + 1, char); + add234(errstrings, es); + } + + return es->text; +} + #ifdef DEBUG static FILE *debug_fp = NULL; static HANDLE debug_hdl = INVALID_HANDLE_VALUE; @@ -319,3 +483,51 @@ void *minefield_c_realloc(void *p, size_t size) } #endif /* MINEFIELD */ + +FontSpec *fontspec_new(const char *name, + int bold, int height, int charset) +{ + FontSpec *f = snew(FontSpec); + f->name = dupstr(name); + f->isbold = bold; + f->height = height; + f->charset = charset; + return f; +} +FontSpec *fontspec_copy(const FontSpec *f) +{ + return fontspec_new(f->name, f->isbold, f->height, f->charset); +} +void fontspec_free(FontSpec *f) +{ + sfree(f->name); + sfree(f); +} +int fontspec_serialise(FontSpec *f, void *vdata) +{ + char *data = (char *)vdata; + int len = strlen(f->name) + 1; /* include trailing NUL */ + if (data) { + strcpy(data, f->name); + PUT_32BIT_MSB_FIRST(data + len, f->isbold); + PUT_32BIT_MSB_FIRST(data + len + 4, f->height); + PUT_32BIT_MSB_FIRST(data + len + 8, f->charset); + } + return len + 12; /* also include three 4-byte ints */ +} +FontSpec *fontspec_deserialise(void *vdata, int maxsize, int *used) +{ + char *data = (char *)vdata; + char *end; + if (maxsize < 13) + return NULL; + end = memchr(data, '\0', maxsize-12); + if (!end) + return NULL; + end++; + *used = end - data + 12; + return fontspec_new(data, + GET_32BIT_MSB_FIRST(end), + GET_32BIT_MSB_FIRST(end + 4), + GET_32BIT_MSB_FIRST(end + 8)); +}