diff options
Diffstat (limited to 'tools/plink/winstore.c')
| -rw-r--r-- | tools/plink/winstore.c | 656 |
1 files changed, 656 insertions, 0 deletions
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 <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include "putty.h"
+#include "storage.h"
+
+#include <shlobj.h>
+#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.
+ */
+}
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