mirror of
git://git.gnupg.org/gnupg.git
synced 2025-01-03 12:11:33 +01:00
common,w32: New function read_w32_reg_string.
* common/w32-reg.c (get_root_key): Remove. (read_w32_registry_string): Turn into a wrapper for the gpgrt function. (read_w32_reg_string): New.
This commit is contained in:
Werner Koch
parent
74c5b35062
commit
5053939480
@ -44,25 +44,28 @@
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static void
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test_read_registry (void)
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{
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char *string;
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char *string1, *string2;
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#ifdef HAVE_W32CE_SYSTEM
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string = read_w32_registry_string ("HKEY_CLASSES_ROOT",
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"BOOTSTRAP\\CLSID", NULL);
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if (!string)
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fail (0);
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fprintf (stderr, "Bootstrap clsid: %s\n", string);
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xfree (string);
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#endif
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string = read_w32_registry_string
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string1 = read_w32_registry_string
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("HKEY_CURRENT_USER",
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"Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings",
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"User Agent");
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if (!string)
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if (!string1)
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fail (0);
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fprintf (stderr, "User agent: %s\n", string);
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xfree (string);
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fprintf (stderr, "User agent: %s\n", string1);
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string2 = read_w32_reg_string
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("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion"
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"\\Internet Settings:User Agent");
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if (!string2)
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fail (1);
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fprintf (stderr, "User agent: %s\n", string2);
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if (strcmp (string1, string2))
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fail (2);
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xfree (string1);
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xfree (string2);
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}
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@ -71,9 +74,13 @@ test_read_registry (void)
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int
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main (int argc, char **argv)
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{
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(void)argc;
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(void)argv;
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if (argc > 1)
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{
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char *string = read_w32_reg_string (argv[1]);
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printf ("%s -> %s\n", argv[1], string? string : "(null)");
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xfree (string);
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}
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else
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test_read_registry ();
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return 0;
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220
common/w32-reg.c
220
common/w32-reg.c
@ -47,184 +47,62 @@
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#include "w32help.h"
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static HKEY
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get_root_key(const char *root)
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{
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HKEY root_key;
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if (!root)
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root_key = HKEY_CURRENT_USER;
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else if (!strcmp( root, "HKEY_CLASSES_ROOT" ) )
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root_key = HKEY_CLASSES_ROOT;
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else if (!strcmp( root, "HKEY_CURRENT_USER" ) )
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root_key = HKEY_CURRENT_USER;
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else if (!strcmp( root, "HKEY_LOCAL_MACHINE" ) )
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root_key = HKEY_LOCAL_MACHINE;
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else if (!strcmp( root, "HKEY_USERS" ) )
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root_key = HKEY_USERS;
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else if (!strcmp( root, "HKEY_PERFORMANCE_DATA" ) )
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root_key = HKEY_PERFORMANCE_DATA;
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else if (!strcmp( root, "HKEY_CURRENT_CONFIG" ) )
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root_key = HKEY_CURRENT_CONFIG;
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else
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return NULL;
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return root_key;
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}
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/* Return a string from the Win32 Registry or NULL in case of error.
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Caller must release the return value. A NULL for root is an alias
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for HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE in turn. */
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char *
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read_w32_registry_string (const char *root, const char *dir, const char *name)
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{
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#ifdef HAVE_W32CE_SYSTEM
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HKEY root_key, key_handle;
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DWORD n1, nbytes, type;
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char *result = NULL;
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wchar_t *wdir, *wname;
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if ( !(root_key = get_root_key(root) ) )
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return NULL;
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wdir = utf8_to_wchar (dir);
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if (!wdir)
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return NULL;
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if (RegOpenKeyEx (root_key, wdir, 0, KEY_READ, &key_handle) )
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{
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if (root)
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{
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xfree (wdir);
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return NULL; /* No need for a RegClose, so return immediately. */
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}
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/* It seems to be common practise to fall back to HKLM. */
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if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, wdir, 0, KEY_READ, &key_handle) )
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{
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xfree (wdir);
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return NULL; /* Still no need for a RegClose. */
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}
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}
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xfree (wdir);
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if (name)
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{
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wname = utf8_to_wchar (name);
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if (!wname)
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goto leave;
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}
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else
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wname = NULL;
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nbytes = 2;
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if (RegQueryValueEx (key_handle, wname, 0, NULL, NULL, &nbytes))
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goto leave;
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result = xtrymalloc ((n1=nbytes+2));
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if (!result)
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goto leave;
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if (RegQueryValueEx (key_handle, wname, 0, &type, result, &n1))
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{
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xfree (result);
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result = NULL;
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goto leave;
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}
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result[nbytes] = 0; /* Make sure it is a string. */
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result[nbytes+1] = 0;
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if (type == REG_SZ || type == REG_EXPAND_SZ)
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{
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wchar_t *tmp = (void*)result;
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result = wchar_to_utf8 (tmp);
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xfree (tmp);
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}
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leave:
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xfree (wname);
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RegCloseKey (key_handle);
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return result;
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#else /*!HAVE_W32CE_SYSTEM*/
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HKEY root_key, key_handle;
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DWORD n1, nbytes, type;
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char *result = NULL;
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if ( !(root_key = get_root_key(root) ) )
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return NULL;
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if (RegOpenKeyEx (root_key, dir, 0, KEY_READ, &key_handle) )
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{
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if (root)
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return NULL; /* No need for a RegClose, so return immediately. */
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/* It seems to be common practise to fall back to HKLM. */
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if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, dir, 0, KEY_READ, &key_handle) )
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return NULL; /* Still no need for a RegClose. */
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}
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nbytes = 1;
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if (RegQueryValueEx( key_handle, name, 0, NULL, NULL, &nbytes ) )
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goto leave;
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result = xtrymalloc ((n1=nbytes+1));
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if (!result)
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goto leave;
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if (RegQueryValueEx( key_handle, name, 0, &type, result, &n1 ))
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{
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xfree (result);
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result = NULL;
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goto leave;
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}
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result[nbytes] = 0; /* Make sure it is a string. */
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if (type == REG_EXPAND_SZ && strchr (result, '%'))
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{
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char *tmp;
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n1 += 1000;
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tmp = xtrymalloc (n1+1);
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if (!tmp)
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goto leave;
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nbytes = ExpandEnvironmentStrings (result, tmp, n1);
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if (nbytes && nbytes > n1)
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{
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xfree (tmp);
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n1 = nbytes;
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tmp = xtrymalloc (n1 + 1);
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if (!tmp)
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goto leave;
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nbytes = ExpandEnvironmentStrings (result, tmp, n1);
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if (nbytes && nbytes > n1)
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{
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/* Oops - truncated, better don't expand at all. */
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xfree (tmp);
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goto leave;
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}
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tmp[nbytes] = 0;
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xfree (result);
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result = tmp;
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}
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else if (nbytes)
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{
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/* Okay, reduce the length. */
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tmp[nbytes] = 0;
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xfree (result);
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result = xtrymalloc (strlen (tmp)+1);
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if (!result)
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result = tmp;
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else
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{
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strcpy (result, tmp);
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xfree (tmp);
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}
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}
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else
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{
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/* Error - don't expand. */
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xfree (tmp);
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}
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}
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leave:
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RegCloseKey (key_handle);
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return result;
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#endif /*!HAVE_W32CE_SYSTEM*/
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return gpgrt_w32_reg_query_string (root, dir, name);
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}
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/* Compact version of read_w32_registry_string. This version expects
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* a single string as key described here using an example:
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*
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* HKCU\Software\GNU\GnuPG:HomeDir
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*
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* HKCU := the class, other supported classes are HKLM, HKCR, HKU, and
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* HKCC. If no class is given and the string thus starts with
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* a backslash HKCU with a fallback to HKLM is used.
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* Software\GNU\GnuPG := The actual key.
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* HomeDir := the name of the item. The name is optional to use the default
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* value.
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*
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* Note that the first backslash and the first colon act as delimiters.
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*
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* Returns a malloced string or NULL if not found.
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*/
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char *
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read_w32_reg_string (const char *key_arg)
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{
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char *key;
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char *p1, *p2;
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char *result;
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if (!key_arg)
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return NULL;
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key = xtrystrdup (key_arg);
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if (!key)
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{
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log_info ("warning: malloc failed while reading registry key\n");
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return NULL;
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}
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p1 = strchr (key, '\\');
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if (!p1)
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{
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xfree (key);
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return NULL;
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}
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*p1++ = 0;
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p2 = strchr (p1, ':');
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if (p2)
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*p2++ = 0;
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result = gpgrt_w32_reg_query_string (*key? key : NULL, p1, p2);
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xfree (key);
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return result;
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}
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#endif /*HAVE_W32_SYSTEM*/
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@ -44,6 +44,7 @@ char **w32_parse_commandline (char *cmdline, int globing, int *r_argv,
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/*-- w32-reg.c --*/
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char *read_w32_registry_string (const char *root,
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const char *dir, const char *name );
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char *read_w32_reg_string (const char *key);
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/* Other stuff. */
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#ifdef HAVE_W32CE_SYSTEM
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