| 1 | /* |
| 2 | * ux_x11.c: fetch local auth data for X forwarding. |
| 3 | */ |
| 4 | |
| 5 | #include <ctype.h> |
| 6 | #include <unistd.h> |
| 7 | #include <assert.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <errno.h> |
| 10 | |
| 11 | #include "putty.h" |
| 12 | #include "ssh.h" |
| 13 | #include "network.h" |
| 14 | |
| 15 | void platform_get_x11_auth(struct X11Display *disp, const Config *cfg) |
| 16 | { |
| 17 | char *xauthfile; |
| 18 | int needs_free; |
| 19 | |
| 20 | /* |
| 21 | * Upgrade an IP-style localhost display to a Unix-socket |
| 22 | * display. |
| 23 | */ |
| 24 | if (!disp->unixdomain && sk_address_is_local(disp->addr)) { |
| 25 | sk_addr_free(disp->addr); |
| 26 | disp->unixdomain = TRUE; |
| 27 | disp->addr = platform_get_x11_unix_address(NULL, disp->displaynum); |
| 28 | disp->realhost = dupprintf("unix:%d", disp->displaynum); |
| 29 | disp->port = 0; |
| 30 | } |
| 31 | |
| 32 | /* |
| 33 | * Set the hostname for Unix-socket displays, so that we'll |
| 34 | * look it up correctly in the X authority file. |
| 35 | */ |
| 36 | if (disp->unixdomain) { |
| 37 | int len; |
| 38 | |
| 39 | sfree(disp->hostname); |
| 40 | disp->hostname = NULL; |
| 41 | len = 128; |
| 42 | do { |
| 43 | len *= 2; |
| 44 | disp->hostname = sresize(disp->hostname, len, char); |
| 45 | if ((gethostname(disp->hostname, len) < 0) && |
| 46 | (errno != ENAMETOOLONG)) { |
| 47 | sfree(disp->hostname); |
| 48 | disp->hostname = NULL; |
| 49 | return; |
| 50 | } |
| 51 | } while (strlen(disp->hostname) >= len-1); |
| 52 | } |
| 53 | |
| 54 | /* |
| 55 | * Find the .Xauthority file. |
| 56 | */ |
| 57 | needs_free = FALSE; |
| 58 | xauthfile = getenv("XAUTHORITY"); |
| 59 | if (!xauthfile) { |
| 60 | xauthfile = getenv("HOME"); |
| 61 | if (xauthfile) { |
| 62 | xauthfile = dupcat(xauthfile, "/.Xauthority", NULL); |
| 63 | needs_free = TRUE; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | if (xauthfile) { |
| 68 | x11_get_auth_from_authfile(disp, xauthfile); |
| 69 | if (needs_free) |
| 70 | sfree(xauthfile); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | const int platform_uses_x11_unix_by_default = TRUE; |