From 6be86147f292b3178413bc644853ad80b620042e Mon Sep 17 00:00:00 2001 From: marha Date: Fri, 19 Nov 2010 12:14:18 +0000 Subject: Reintegrate tools from trunk --- tools/plink/winstore.c | 656 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 656 insertions(+) create mode 100644 tools/plink/winstore.c (limited to 'tools/plink/winstore.c') diff --git a/tools/plink/winstore.c b/tools/plink/winstore.c new file mode 100644 index 000000000..b1b3d3a66 --- /dev/null +++ b/tools/plink/winstore.c @@ -0,0 +1,656 @@ +/* + * winstore.c: Windows-specific implementation of the interface + * defined in storage.h. + */ + +#include +#include +#include +#include "putty.h" +#include "storage.h" + +#include +#ifndef CSIDL_APPDATA +#define CSIDL_APPDATA 0x001a +#endif +#ifndef CSIDL_LOCAL_APPDATA +#define CSIDL_LOCAL_APPDATA 0x001c +#endif + +static const char *const puttystr = PUTTY_REG_POS "\\Sessions"; + +static const char hex[16] = "0123456789ABCDEF"; + +static int tried_shgetfolderpath = FALSE; +static HMODULE shell32_module = NULL; +typedef HRESULT (WINAPI *p_SHGetFolderPath_t) + (HWND, int, HANDLE, DWORD, LPTSTR); +static p_SHGetFolderPath_t p_SHGetFolderPath = NULL; + +static void mungestr(const char *in, char *out) +{ + int candot = 0; + + while (*in) { + if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' || + *in == '%' || *in < ' ' || *in > '~' || (*in == '.' + && !candot)) { + *out++ = '%'; + *out++ = hex[((unsigned char) *in) >> 4]; + *out++ = hex[((unsigned char) *in) & 15]; + } else + *out++ = *in; + in++; + candot = 1; + } + *out = '\0'; + return; +} + +static void unmungestr(const char *in, char *out, int outlen) +{ + while (*in) { + if (*in == '%' && in[1] && in[2]) { + int i, j; + + i = in[1] - '0'; + i -= (i > 9 ? 7 : 0); + j = in[2] - '0'; + j -= (j > 9 ? 7 : 0); + + *out++ = (i << 4) + j; + if (!--outlen) + return; + in += 3; + } else { + *out++ = *in++; + if (!--outlen) + return; + } + } + *out = '\0'; + return; +} + +void *open_settings_w(const char *sessionname, char **errmsg) +{ + HKEY subkey1, sesskey; + int ret; + char *p; + + *errmsg = NULL; + + if (!sessionname || !*sessionname) + sessionname = "Default Settings"; + + p = snewn(3 * strlen(sessionname) + 1, char); + mungestr(sessionname, p); + + ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1); + if (ret != ERROR_SUCCESS) { + sfree(p); + *errmsg = dupprintf("Unable to create registry key\n" + "HKEY_CURRENT_USER\\%s", puttystr); + return NULL; + } + ret = RegCreateKey(subkey1, p, &sesskey); + RegCloseKey(subkey1); + if (ret != ERROR_SUCCESS) { + *errmsg = dupprintf("Unable to create registry key\n" + "HKEY_CURRENT_USER\\%s\\%s", puttystr, p); + sfree(p); + return NULL; + } + sfree(p); + return (void *) sesskey; +} + +void write_setting_s(void *handle, const char *key, const char *value) +{ + if (handle) + RegSetValueEx((HKEY) handle, key, 0, REG_SZ, value, + 1 + strlen(value)); +} + +void write_setting_i(void *handle, const char *key, int value) +{ + if (handle) + RegSetValueEx((HKEY) handle, key, 0, REG_DWORD, + (CONST BYTE *) &value, sizeof(value)); +} + +void close_settings_w(void *handle) +{ + RegCloseKey((HKEY) handle); +} + +void *open_settings_r(const char *sessionname) +{ + HKEY subkey1, sesskey; + char *p; + + if (!sessionname || !*sessionname) + sessionname = "Default Settings"; + + p = snewn(3 * strlen(sessionname) + 1, char); + mungestr(sessionname, p); + + if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) { + sesskey = NULL; + } else { + if (RegOpenKey(subkey1, p, &sesskey) != ERROR_SUCCESS) { + sesskey = NULL; + } + RegCloseKey(subkey1); + } + + sfree(p); + + return (void *) sesskey; +} + +char *read_setting_s(void *handle, const char *key, char *buffer, int buflen) +{ + DWORD type, size; + size = buflen; + + if (!handle || + RegQueryValueEx((HKEY) handle, key, 0, + &type, buffer, &size) != ERROR_SUCCESS || + type != REG_SZ) return NULL; + else + return buffer; +} + +int read_setting_i(void *handle, const char *key, int defvalue) +{ + DWORD type, val, size; + size = sizeof(val); + + if (!handle || + RegQueryValueEx((HKEY) handle, key, 0, &type, + (BYTE *) &val, &size) != ERROR_SUCCESS || + size != sizeof(val) || type != REG_DWORD) + return defvalue; + else + return val; +} + +int read_setting_fontspec(void *handle, const char *name, FontSpec *result) +{ + char *settingname; + FontSpec ret; + + if (!read_setting_s(handle, name, ret.name, sizeof(ret.name))) + return 0; + settingname = dupcat(name, "IsBold", NULL); + ret.isbold = read_setting_i(handle, settingname, -1); + sfree(settingname); + if (ret.isbold == -1) return 0; + settingname = dupcat(name, "CharSet", NULL); + ret.charset = read_setting_i(handle, settingname, -1); + sfree(settingname); + if (ret.charset == -1) return 0; + settingname = dupcat(name, "Height", NULL); + ret.height = read_setting_i(handle, settingname, INT_MIN); + sfree(settingname); + if (ret.height == INT_MIN) return 0; + *result = ret; + return 1; +} + +void write_setting_fontspec(void *handle, const char *name, FontSpec font) +{ + char *settingname; + + write_setting_s(handle, name, font.name); + settingname = dupcat(name, "IsBold", NULL); + write_setting_i(handle, settingname, font.isbold); + sfree(settingname); + settingname = dupcat(name, "CharSet", NULL); + write_setting_i(handle, settingname, font.charset); + sfree(settingname); + settingname = dupcat(name, "Height", NULL); + write_setting_i(handle, settingname, font.height); + sfree(settingname); +} + +int read_setting_filename(void *handle, const char *name, Filename *result) +{ + return !!read_setting_s(handle, name, result->path, sizeof(result->path)); +} + +void write_setting_filename(void *handle, const char *name, Filename result) +{ + write_setting_s(handle, name, result.path); +} + +void close_settings_r(void *handle) +{ + RegCloseKey((HKEY) handle); +} + +void del_settings(const char *sessionname) +{ + HKEY subkey1; + char *p; + + if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) + return; + + p = snewn(3 * strlen(sessionname) + 1, char); + mungestr(sessionname, p); + RegDeleteKey(subkey1, p); + sfree(p); + + RegCloseKey(subkey1); +} + +struct enumsettings { + HKEY key; + int i; +}; + +void *enum_settings_start(void) +{ + struct enumsettings *ret; + HKEY key; + + if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS) + return NULL; + + ret = snew(struct enumsettings); + if (ret) { + ret->key = key; + ret->i = 0; + } + + return ret; +} + +char *enum_settings_next(void *handle, char *buffer, int buflen) +{ + struct enumsettings *e = (struct enumsettings *) handle; + char *otherbuf; + otherbuf = snewn(3 * buflen, char); + if (RegEnumKey(e->key, e->i++, otherbuf, 3 * buflen) == ERROR_SUCCESS) { + unmungestr(otherbuf, buffer, buflen); + sfree(otherbuf); + return buffer; + } else { + sfree(otherbuf); + return NULL; + } +} + +void enum_settings_finish(void *handle) +{ + struct enumsettings *e = (struct enumsettings *) handle; + RegCloseKey(e->key); + sfree(e); +} + +static void hostkey_regname(char *buffer, const char *hostname, + int port, const char *keytype) +{ + int len; + strcpy(buffer, keytype); + strcat(buffer, "@"); + len = strlen(buffer); + len += sprintf(buffer + len, "%d:", port); + mungestr(hostname, buffer + strlen(buffer)); +} + +int verify_host_key(const char *hostname, int port, + const char *keytype, const char *key) +{ + char *otherstr, *regname; + int len; + HKEY rkey; + DWORD readlen; + DWORD type; + int ret, compare; + + len = 1 + strlen(key); + + /* + * Now read a saved key in from the registry and see what it + * says. + */ + otherstr = snewn(len, char); + regname = snewn(3 * (strlen(hostname) + strlen(keytype)) + 15, char); + + hostkey_regname(regname, hostname, port, keytype); + + if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", + &rkey) != ERROR_SUCCESS) + return 1; /* key does not exist in registry */ + + readlen = len; + ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen); + + if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA && + !strcmp(keytype, "rsa")) { + /* + * Key didn't exist. If the key type is RSA, we'll try + * another trick, which is to look up the _old_ key format + * under just the hostname and translate that. + */ + char *justhost = regname + 1 + strcspn(regname, ":"); + char *oldstyle = snewn(len + 10, char); /* safety margin */ + readlen = len; + ret = RegQueryValueEx(rkey, justhost, NULL, &type, + oldstyle, &readlen); + + if (ret == ERROR_SUCCESS && type == REG_SZ) { + /* + * The old format is two old-style bignums separated by + * a slash. An old-style bignum is made of groups of + * four hex digits: digits are ordered in sensible + * (most to least significant) order within each group, + * but groups are ordered in silly (least to most) + * order within the bignum. The new format is two + * ordinary C-format hex numbers (0xABCDEFG...XYZ, with + * A nonzero except in the special case 0x0, which + * doesn't appear anyway in RSA keys) separated by a + * comma. All hex digits are lowercase in both formats. + */ + char *p = otherstr; + char *q = oldstyle; + int i, j; + + for (i = 0; i < 2; i++) { + int ndigits, nwords; + *p++ = '0'; + *p++ = 'x'; + ndigits = strcspn(q, "/"); /* find / or end of string */ + nwords = ndigits / 4; + /* now trim ndigits to remove leading zeros */ + while (q[(ndigits - 1) ^ 3] == '0' && ndigits > 1) + ndigits--; + /* now move digits over to new string */ + for (j = 0; j < ndigits; j++) + p[ndigits - 1 - j] = q[j ^ 3]; + p += ndigits; + q += nwords * 4; + if (*q) { + q++; /* eat the slash */ + *p++ = ','; /* add a comma */ + } + *p = '\0'; /* terminate the string */ + } + + /* + * Now _if_ this key matches, we'll enter it in the new + * format. If not, we'll assume something odd went + * wrong, and hyper-cautiously do nothing. + */ + if (!strcmp(otherstr, key)) + RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr, + strlen(otherstr) + 1); + } + } + + RegCloseKey(rkey); + + compare = strcmp(otherstr, key); + + sfree(otherstr); + sfree(regname); + + if (ret == ERROR_MORE_DATA || + (ret == ERROR_SUCCESS && type == REG_SZ && compare)) + return 2; /* key is different in registry */ + else if (ret != ERROR_SUCCESS || type != REG_SZ) + return 1; /* key does not exist in registry */ + else + return 0; /* key matched OK in registry */ +} + +void store_host_key(const char *hostname, int port, + const char *keytype, const char *key) +{ + char *regname; + HKEY rkey; + + regname = snewn(3 * (strlen(hostname) + strlen(keytype)) + 15, char); + + hostkey_regname(regname, hostname, port, keytype); + + if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", + &rkey) == ERROR_SUCCESS) { + RegSetValueEx(rkey, regname, 0, REG_SZ, key, strlen(key) + 1); + RegCloseKey(rkey); + } /* else key does not exist in registry */ + + sfree(regname); +} + +/* + * Open (or delete) the random seed file. + */ +enum { DEL, OPEN_R, OPEN_W }; +static int try_random_seed(char const *path, int action, HANDLE *ret) +{ + if (action == DEL) { + remove(path); + *ret = INVALID_HANDLE_VALUE; + return FALSE; /* so we'll do the next ones too */ + } + + *ret = CreateFile(path, + action == OPEN_W ? GENERIC_WRITE : GENERIC_READ, + action == OPEN_W ? 0 : (FILE_SHARE_READ | + FILE_SHARE_WRITE), + NULL, + action == OPEN_W ? CREATE_ALWAYS : OPEN_EXISTING, + action == OPEN_W ? FILE_ATTRIBUTE_NORMAL : 0, + NULL); + + return (*ret != INVALID_HANDLE_VALUE); +} + +static HANDLE access_random_seed(int action) +{ + HKEY rkey; + DWORD type, size; + HANDLE rethandle; + char seedpath[2 * MAX_PATH + 10] = "\0"; + + /* + * Iterate over a selection of possible random seed paths until + * we find one that works. + * + * We do this iteration separately for reading and writing, + * meaning that we will automatically migrate random seed files + * if a better location becomes available (by reading from the + * best location in which we actually find one, and then + * writing to the best location in which we can _create_ one). + */ + + /* + * First, try the location specified by the user in the + * Registry, if any. + */ + size = sizeof(seedpath); + if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey) == + ERROR_SUCCESS) { + int ret = RegQueryValueEx(rkey, "RandSeedFile", + 0, &type, seedpath, &size); + if (ret != ERROR_SUCCESS || type != REG_SZ) + seedpath[0] = '\0'; + RegCloseKey(rkey); + + if (*seedpath && try_random_seed(seedpath, action, &rethandle)) + return rethandle; + } + + /* + * Next, try the user's local Application Data directory, + * followed by their non-local one. This is found using the + * SHGetFolderPath function, which won't be present on all + * versions of Windows. + */ + if (!tried_shgetfolderpath) { + /* This is likely only to bear fruit on systems with IE5+ + * installed, or WinMe/2K+. There is some faffing with + * SHFOLDER.DLL we could do to try to find an equivalent + * on older versions of Windows if we cared enough. + * However, the invocation below requires IE5+ anyway, + * so stuff that. */ + shell32_module = LoadLibrary("SHELL32.DLL"); + if (shell32_module) { + p_SHGetFolderPath = (p_SHGetFolderPath_t) + GetProcAddress(shell32_module, "SHGetFolderPathA"); + } + } + if (p_SHGetFolderPath) { + if (SUCCEEDED(p_SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, + NULL, SHGFP_TYPE_CURRENT, seedpath))) { + strcat(seedpath, "\\PUTTY.RND"); + if (try_random_seed(seedpath, action, &rethandle)) + return rethandle; + } + + if (SUCCEEDED(p_SHGetFolderPath(NULL, CSIDL_APPDATA, + NULL, SHGFP_TYPE_CURRENT, seedpath))) { + strcat(seedpath, "\\PUTTY.RND"); + if (try_random_seed(seedpath, action, &rethandle)) + return rethandle; + } + } + + /* + * Failing that, try %HOMEDRIVE%%HOMEPATH% as a guess at the + * user's home directory. + */ + { + int len, ret; + + len = + GetEnvironmentVariable("HOMEDRIVE", seedpath, + sizeof(seedpath)); + ret = + GetEnvironmentVariable("HOMEPATH", seedpath + len, + sizeof(seedpath) - len); + if (ret != 0) { + strcat(seedpath, "\\PUTTY.RND"); + if (try_random_seed(seedpath, action, &rethandle)) + return rethandle; + } + } + + /* + * And finally, fall back to C:\WINDOWS. + */ + GetWindowsDirectory(seedpath, sizeof(seedpath)); + strcat(seedpath, "\\PUTTY.RND"); + if (try_random_seed(seedpath, action, &rethandle)) + return rethandle; + + /* + * If even that failed, give up. + */ + return INVALID_HANDLE_VALUE; +} + +void read_random_seed(noise_consumer_t consumer) +{ + HANDLE seedf = access_random_seed(OPEN_R); + + if (seedf != INVALID_HANDLE_VALUE) { + while (1) { + char buf[1024]; + DWORD len; + + if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len) + consumer(buf, len); + else + break; + } + CloseHandle(seedf); + } +} + +void write_random_seed(void *data, int len) +{ + HANDLE seedf = access_random_seed(OPEN_W); + + if (seedf != INVALID_HANDLE_VALUE) { + DWORD lenwritten; + + WriteFile(seedf, data, len, &lenwritten, NULL); + CloseHandle(seedf); + } +} + +/* + * Recursively delete a registry key and everything under it. + */ +static void registry_recursive_remove(HKEY key) +{ + DWORD i; + char name[MAX_PATH + 1]; + HKEY subkey; + + i = 0; + while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) { + if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) { + registry_recursive_remove(subkey); + RegCloseKey(subkey); + } + RegDeleteKey(key, name); + } +} + +void cleanup_all(void) +{ + HKEY key; + int ret; + char name[MAX_PATH + 1]; + + /* ------------------------------------------------------------ + * Wipe out the random seed file, in all of its possible + * locations. + */ + access_random_seed(DEL); + + /* ------------------------------------------------------------ + * Destroy all registry information associated with PuTTY. + */ + + /* + * Open the main PuTTY registry key and remove everything in it. + */ + if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == + ERROR_SUCCESS) { + registry_recursive_remove(key); + RegCloseKey(key); + } + /* + * Now open the parent key and remove the PuTTY main key. Once + * we've done that, see if the parent key has any other + * children. + */ + if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT, + &key) == ERROR_SUCCESS) { + RegDeleteKey(key, PUTTY_REG_PARENT_CHILD); + ret = RegEnumKey(key, 0, name, sizeof(name)); + RegCloseKey(key); + /* + * If the parent key had no other children, we must delete + * it in its turn. That means opening the _grandparent_ + * key. + */ + if (ret != ERROR_SUCCESS) { + if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT, + &key) == ERROR_SUCCESS) { + RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD); + RegCloseKey(key); + } + } + } + /* + * Now we're done. + */ +} -- cgit v1.2.3