]> asedeno.scripts.mit.edu Git - PuTTY.git/blob - unix/uxgss.c
Patch from Alejandro Sedeno, somewhat modified by me, which
[PuTTY.git] / unix / uxgss.c
1 #include "putty.h"
2 #ifndef NO_GSSAPI
3 #include "pgssapi.h"
4 #include "sshgss.h"
5 #include "sshgssc.h"
6
7 /* Unix code to set up the GSSAPI library list. */
8
9 struct ssh_gss_library ssh_gss_libraries[3];
10 int n_ssh_gss_libraries = 0;
11 static int initialised = FALSE;
12
13 const int ngsslibs = 3;
14 const char *const gsslibnames[3] = {
15     "libgssapi (Heimdal)",
16     "libgssapi_krb5 (MIT Kerberos)",
17     "libgss (Sun)",
18 };
19 const struct keyval gsslibkeywords[] = {
20     { "libgssapi", 0 },
21     { "libgssapi_krb5", 1 },
22     { "libgss", 2 },
23 };
24
25 #ifndef NO_LIBDL
26
27 /*
28  * Run-time binding against a choice of GSSAPI implementations. We
29  * try loading several libraries, and produce an entry in
30  * ssh_gss_libraries[] for each one.
31  */
32
33 static void gss_init(struct ssh_gss_library *lib, void *dlhandle,
34                      int id, const char *msg)
35 {
36     lib->id = id;
37     lib->gsslogmsg = msg;
38
39 #define BIND_GSS_FN(name) \
40     lib->u.gssapi.name = (t_gss_##name) dlsym(dlhandle, "gss_" #name)
41
42     BIND_GSS_FN(delete_sec_context);
43     BIND_GSS_FN(display_status);
44     BIND_GSS_FN(get_mic);
45     BIND_GSS_FN(import_name);
46     BIND_GSS_FN(init_sec_context);
47     BIND_GSS_FN(release_buffer);
48     BIND_GSS_FN(release_cred);
49     BIND_GSS_FN(release_name);
50
51 #undef BIND_GSS_FN
52
53     ssh_gssapi_bind_fns(lib);
54 }
55
56 /* Dynamically load gssapi libs. */
57 void ssh_gss_init(void)
58 {
59     void *gsslib;
60
61     if (initialised) return;
62     initialised = TRUE;
63
64     /* Heimdal's GSSAPI Library */
65     if ((gsslib = dlopen("libgssapi.so.2", RTLD_LAZY)) != NULL)
66         gss_init(&ssh_gss_libraries[n_ssh_gss_libraries++], gsslib,
67                  0, "Using GSSAPI from libgssapi.so.2");
68
69     /* MIT Kerberos's GSSAPI Library */
70     if ((gsslib = dlopen("libgssapi_krb5.so.2", RTLD_LAZY)) != NULL)
71         gss_init(&ssh_gss_libraries[n_ssh_gss_libraries++], gsslib,
72                  1, "Using GSSAPI from libgssapi_krb5.so.2");
73
74     /* Sun's GSSAPI Library */
75     if ((gsslib = dlopen("libgss.so.1", RTLD_LAZY)) != NULL)
76         gss_init(&ssh_gss_libraries[n_ssh_gss_libraries++], gsslib,
77                  2, "Using GSSAPI from libgss.so.1");
78 }
79
80 #else /* NO_LIBDL */
81
82 /*
83  * Link-time binding against GSSAPI. Here we just construct a single
84  * library structure containing pointers to the functions we linked
85  * against.
86  */
87
88 #include <gssapi/gssapi.h>
89
90 /* Dynamically load gssapi libs. */
91 void ssh_gss_init(void)
92 {
93     if (initialised) return;
94     initialised = TRUE;
95
96     n_ssh_gss_libraries = 1;
97     ssh_gss_libraries[0].gsslogmsg = "Using statically linked GSSAPI";
98
99 #define BIND_GSS_FN(name) \
100     ssh_gss_libraries[0].u.gssapi.name = (t_gss_##name) gss_##name
101
102     BIND_GSS_FN(delete_sec_context);
103     BIND_GSS_FN(display_status);
104     BIND_GSS_FN(get_mic);
105     BIND_GSS_FN(import_name);
106     BIND_GSS_FN(init_sec_context);
107     BIND_GSS_FN(release_buffer);
108     BIND_GSS_FN(release_cred);
109     BIND_GSS_FN(release_name);
110
111 #undef BIND_GSS_FN
112
113     ssh_gssapi_bind_fns(&ssh_gss_libraries[0]);
114 }
115
116 #endif /* NO_LIBDL */
117
118 #endif /* NO_GSSAPI */