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3396c97da9
Now that the new CMake build system is encouraging us to lay out the code like a set of libraries, it seems like a good idea to make them look more _like_ libraries, by putting things into separate modules as far as possible. This fixes several previous annoyances in which you had to link against some object in order to get a function you needed, but that object also contained other functions you didn't need which included link-time symbol references you didn't want to have to deal with. The usual offender was subsidiary supporting programs including misc.c for some innocuous function and then finding they had to deal with the requirements of buildinfo(). This big reorganisation introduces three new subdirectories called 'utils', one at the top level and one in each platform subdir. In each case, the directory contains basically the same files that were previously placed in the 'utils' build-time library, except that the ones that were extremely miscellaneous (misc.c, utils.c, uxmisc.c, winmisc.c, winmiscs.c, winutils.c) have been split up into much smaller pieces.
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* Implementation of get_username() for Windows.
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*/
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#include "putty.h"
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#ifndef SECURITY_WIN32
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#define SECURITY_WIN32
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#endif
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#include <security.h>
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char *get_username(void)
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{
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DWORD namelen;
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char *user;
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bool got_username = false;
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DECL_WINDOWS_FUNCTION(static, BOOLEAN, GetUserNameExA,
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(EXTENDED_NAME_FORMAT, LPSTR, PULONG));
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{
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static bool tried_usernameex = false;
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if (!tried_usernameex) {
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/* Not available on Win9x, so load dynamically */
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HMODULE secur32 = load_system32_dll("secur32.dll");
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/* If MIT Kerberos is installed, the following call to
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GET_WINDOWS_FUNCTION makes Windows implicitly load
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sspicli.dll WITHOUT proper path sanitizing, so better
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load it properly before */
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HMODULE sspicli = load_system32_dll("sspicli.dll");
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(void)sspicli; /* squash compiler warning about unused variable */
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GET_WINDOWS_FUNCTION(secur32, GetUserNameExA);
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tried_usernameex = true;
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}
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}
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if (p_GetUserNameExA) {
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/*
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* If available, use the principal -- this avoids the problem
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* that the local username is case-insensitive but Kerberos
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* usernames are case-sensitive.
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*/
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/* Get the length */
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namelen = 0;
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(void) p_GetUserNameExA(NameUserPrincipal, NULL, &namelen);
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user = snewn(namelen, char);
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got_username = p_GetUserNameExA(NameUserPrincipal, user, &namelen);
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if (got_username) {
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char *p = strchr(user, '@');
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if (p) *p = 0;
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} else {
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sfree(user);
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}
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}
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if (!got_username) {
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/* Fall back to local user name */
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namelen = 0;
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if (!GetUserName(NULL, &namelen)) {
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/*
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* Apparently this doesn't work at least on Windows XP SP2.
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* Thus assume a maximum of 256. It will fail again if it
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* doesn't fit.
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*/
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namelen = 256;
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}
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user = snewn(namelen, char);
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got_username = GetUserName(user, &namelen);
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if (!got_username) {
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sfree(user);
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}
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}
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return got_username ? user : NULL;
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}
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