#include "putty.h"
-#define SECURITY_WIN32
#include <security.h>
+#include "pgssapi.h"
#include "sshgss.h"
+#include "sshgssc.h"
+
#include "misc.h"
+/* Windows code to set up the GSSAPI library list. */
+
+const int ngsslibs = 3;
+const char *const gsslibnames[3] = {
+ "MIT Kerberos GSSAPI32.DLL",
+ "Microsoft SSPI SECUR32.DLL",
+ "User-specified GSSAPI DLL",
+};
+const struct keyvalwhere gsslibkeywords[] = {
+ { "gssapi32", 0, -1, -1 },
+ { "sspi", 1, -1, -1 },
+ { "custom", 2, -1, -1 },
+};
+
DECL_WINDOWS_FUNCTION(static, SECURITY_STATUS,
AcquireCredentialsHandleA,
(SEC_CHAR *, SEC_CHAR *, ULONG, PLUID,
MakeSignature,
(PCtxtHandle, ULONG, PSecBufferDesc, ULONG));
-static HMODULE security_module = NULL;
-
typedef struct winSsh_gss_ctx {
unsigned long maj_stat;
unsigned long min_stat;
const Ssh_gss_buf gss_mech_krb5={9,"\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"};
-int ssh_gss_init(void)
+const char *gsslogmsg = NULL;
+
+static void ssh_sspi_bind_fns(struct ssh_gss_library *lib);
+
+struct ssh_gss_liblist *ssh_gss_setup(Conf *conf)
+{
+ HMODULE module;
+ HKEY regkey;
+ struct ssh_gss_liblist *list = snew(struct ssh_gss_liblist);
+ char *path;
+
+ list->libraries = snewn(3, struct ssh_gss_library);
+ list->nlibraries = 0;
+
+ /* MIT Kerberos GSSAPI implementation */
+ /* TODO: For 64-bit builds, check for gssapi64.dll */
+ module = NULL;
+ if (RegOpenKey(HKEY_LOCAL_MACHINE, "SOFTWARE\\MIT\\Kerberos", ®key)
+ == ERROR_SUCCESS) {
+ DWORD type, size;
+ LONG ret;
+ char *buffer;
+
+ /* Find out the string length */
+ ret = RegQueryValueEx(regkey, "InstallDir", NULL, &type, NULL, &size);
+
+ if (ret == ERROR_SUCCESS && type == REG_SZ) {
+ buffer = snewn(size + 20, char);
+ ret = RegQueryValueEx(regkey, "InstallDir", NULL,
+ &type, buffer, &size);
+ if (ret == ERROR_SUCCESS && type == REG_SZ) {
+ strcat(buffer, "\\bin\\gssapi32.dll");
+ module = LoadLibrary(buffer);
+ }
+ sfree(buffer);
+ }
+ RegCloseKey(regkey);
+ }
+ if (module) {
+ struct ssh_gss_library *lib =
+ &list->libraries[list->nlibraries++];
+
+ lib->id = 0;
+ lib->gsslogmsg = "Using GSSAPI from GSSAPI32.DLL";
+ lib->handle = (void *)module;
+
+#define BIND_GSS_FN(name) \
+ lib->u.gssapi.name = (t_gss_##name) GetProcAddress(module, "gss_" #name)
+
+ BIND_GSS_FN(delete_sec_context);
+ BIND_GSS_FN(display_status);
+ BIND_GSS_FN(get_mic);
+ BIND_GSS_FN(import_name);
+ BIND_GSS_FN(init_sec_context);
+ BIND_GSS_FN(release_buffer);
+ BIND_GSS_FN(release_cred);
+ BIND_GSS_FN(release_name);
+
+#undef BIND_GSS_FN
+
+ ssh_gssapi_bind_fns(lib);
+ }
+
+ /* Microsoft SSPI Implementation */
+ module = load_system32_dll("secur32.dll");
+ if (module) {
+ struct ssh_gss_library *lib =
+ &list->libraries[list->nlibraries++];
+
+ lib->id = 1;
+ lib->gsslogmsg = "Using SSPI from SECUR32.DLL";
+ lib->handle = (void *)module;
+
+ GET_WINDOWS_FUNCTION(module, AcquireCredentialsHandleA);
+ GET_WINDOWS_FUNCTION(module, InitializeSecurityContextA);
+ GET_WINDOWS_FUNCTION(module, FreeContextBuffer);
+ GET_WINDOWS_FUNCTION(module, FreeCredentialsHandle);
+ GET_WINDOWS_FUNCTION(module, DeleteSecurityContext);
+ GET_WINDOWS_FUNCTION(module, QueryContextAttributesA);
+ GET_WINDOWS_FUNCTION(module, MakeSignature);
+
+ ssh_sspi_bind_fns(lib);
+ }
+
+ /*
+ * Custom GSSAPI DLL.
+ */
+ module = NULL;
+ path = conf_get_filename(conf, CONF_ssh_gss_custom)->path;
+ if (*path) {
+ module = LoadLibrary(path);
+ }
+ if (module) {
+ struct ssh_gss_library *lib =
+ &list->libraries[list->nlibraries++];
+
+ lib->id = 2;
+ lib->gsslogmsg = dupprintf("Using GSSAPI from user-specified"
+ " library '%s'", path);
+ lib->handle = (void *)module;
+
+#define BIND_GSS_FN(name) \
+ lib->u.gssapi.name = (t_gss_##name) GetProcAddress(module, "gss_" #name)
+
+ BIND_GSS_FN(delete_sec_context);
+ BIND_GSS_FN(display_status);
+ BIND_GSS_FN(get_mic);
+ BIND_GSS_FN(import_name);
+ BIND_GSS_FN(init_sec_context);
+ BIND_GSS_FN(release_buffer);
+ BIND_GSS_FN(release_cred);
+ BIND_GSS_FN(release_name);
+
+#undef BIND_GSS_FN
+
+ ssh_gssapi_bind_fns(lib);
+ }
+
+
+ return list;
+}
+
+void ssh_gss_cleanup(struct ssh_gss_liblist *list)
{
- if (security_module)
- return 1; /* already initialised */
-
- security_module = LoadLibrary("secur32.dll");
- if (security_module) {
- GET_WINDOWS_FUNCTION(security_module, AcquireCredentialsHandleA);
- GET_WINDOWS_FUNCTION(security_module, InitializeSecurityContextA);
- GET_WINDOWS_FUNCTION(security_module, FreeContextBuffer);
- GET_WINDOWS_FUNCTION(security_module, FreeCredentialsHandle);
- GET_WINDOWS_FUNCTION(security_module, DeleteSecurityContext);
- GET_WINDOWS_FUNCTION(security_module, QueryContextAttributesA);
- GET_WINDOWS_FUNCTION(security_module, MakeSignature);
- return 1;
+ int i;
+
+ /*
+ * LoadLibrary and FreeLibrary are defined to employ reference
+ * counting in the case where the same library is repeatedly
+ * loaded, so even in a multiple-sessions-per-process context
+ * (not that we currently expect ever to have such a thing on
+ * Windows) it's safe to naively FreeLibrary everything here
+ * without worrying about destroying it under the feet of
+ * another SSH instance still using it.
+ */
+ for (i = 0; i < list->nlibraries; i++) {
+ FreeLibrary((HMODULE)list->libraries[i].handle);
+ if (list->libraries[i].id == 2) {
+ /* The 'custom' id involves a dynamically allocated message.
+ * Note that we must cast away the 'const' to free it. */
+ sfree((char *)list->libraries[i].gsslogmsg);
+ }
}
- return 0;
+ sfree(list->libraries);
+ sfree(list);
}
-Ssh_gss_stat ssh_gss_indicate_mech(Ssh_gss_buf *mech)
+static Ssh_gss_stat ssh_sspi_indicate_mech(struct ssh_gss_library *lib,
+ Ssh_gss_buf *mech)
{
*mech = gss_mech_krb5;
return SSH_GSS_OK;
}
-Ssh_gss_stat ssh_gss_import_name(char *host, Ssh_gss_name *srv_name)
+static Ssh_gss_stat ssh_sspi_import_name(struct ssh_gss_library *lib,
+ char *host, Ssh_gss_name *srv_name)
{
char *pStr;
return SSH_GSS_OK;
}
-Ssh_gss_stat ssh_gss_acquire_cred(Ssh_gss_ctx *ctx)
+static Ssh_gss_stat ssh_sspi_acquire_cred(struct ssh_gss_library *lib,
+ Ssh_gss_ctx *ctx)
{
winSsh_gss_ctx *winctx = snew(winSsh_gss_ctx);
memset(winctx, 0, sizeof(winSsh_gss_ctx));
}
-Ssh_gss_stat ssh_gss_init_sec_context(Ssh_gss_ctx *ctx,
- Ssh_gss_name srv_name,
- int to_deleg,
- Ssh_gss_buf *recv_tok,
- Ssh_gss_buf *send_tok)
+static Ssh_gss_stat ssh_sspi_init_sec_context(struct ssh_gss_library *lib,
+ Ssh_gss_ctx *ctx,
+ Ssh_gss_name srv_name,
+ int to_deleg,
+ Ssh_gss_buf *recv_tok,
+ Ssh_gss_buf *send_tok)
{
winSsh_gss_ctx *winctx = (winSsh_gss_ctx *) *ctx;
SecBuffer wsend_tok = {send_tok->length,SECBUFFER_TOKEN,send_tok->value};
return SSH_GSS_FAILURE;
}
-Ssh_gss_stat ssh_gss_free_tok(Ssh_gss_buf *send_tok)
+static Ssh_gss_stat ssh_sspi_free_tok(struct ssh_gss_library *lib,
+ Ssh_gss_buf *send_tok)
{
/* check input */
if (send_tok == NULL) return SSH_GSS_FAILURE;
return SSH_GSS_OK;
}
-Ssh_gss_stat ssh_gss_release_cred(Ssh_gss_ctx *ctx)
+static Ssh_gss_stat ssh_sspi_release_cred(struct ssh_gss_library *lib,
+ Ssh_gss_ctx *ctx)
{
winSsh_gss_ctx *winctx= (winSsh_gss_ctx *) *ctx;
}
-Ssh_gss_stat ssh_gss_release_name(Ssh_gss_name *srv_name)
+static Ssh_gss_stat ssh_sspi_release_name(struct ssh_gss_library *lib,
+ Ssh_gss_name *srv_name)
{
char *pStr= (char *) *srv_name;
return SSH_GSS_OK;
}
-Ssh_gss_stat ssh_gss_display_status(Ssh_gss_ctx ctx, Ssh_gss_buf *buf)
+static Ssh_gss_stat ssh_sspi_display_status(struct ssh_gss_library *lib,
+ Ssh_gss_ctx ctx, Ssh_gss_buf *buf)
{
winSsh_gss_ctx *winctx = (winSsh_gss_ctx *) ctx;
char *msg;
return SSH_GSS_OK;
}
-Ssh_gss_stat ssh_gss_get_mic(Ssh_gss_ctx ctx, Ssh_gss_buf *buf,
- Ssh_gss_buf *hash)
+static Ssh_gss_stat ssh_sspi_get_mic(struct ssh_gss_library *lib,
+ Ssh_gss_ctx ctx, Ssh_gss_buf *buf,
+ Ssh_gss_buf *hash)
{
winSsh_gss_ctx *winctx= (winSsh_gss_ctx *) ctx;
SecPkgContext_Sizes ContextSizes;
return winctx->maj_stat;
}
-Ssh_gss_stat ssh_gss_free_mic(Ssh_gss_buf *hash)
+static Ssh_gss_stat ssh_sspi_free_mic(struct ssh_gss_library *lib,
+ Ssh_gss_buf *hash)
{
sfree(hash->value);
return SSH_GSS_OK;
}
+static void ssh_sspi_bind_fns(struct ssh_gss_library *lib)
+{
+ lib->indicate_mech = ssh_sspi_indicate_mech;
+ lib->import_name = ssh_sspi_import_name;
+ lib->release_name = ssh_sspi_release_name;
+ lib->init_sec_context = ssh_sspi_init_sec_context;
+ lib->free_tok = ssh_sspi_free_tok;
+ lib->acquire_cred = ssh_sspi_acquire_cred;
+ lib->release_cred = ssh_sspi_release_cred;
+ lib->get_mic = ssh_sspi_get_mic;
+ lib->free_mic = ssh_sspi_free_mic;
+ lib->display_status = ssh_sspi_display_status;
+}
+
#else
/* Dummy function so this source file defines something if NO_GSSAPI
is defined. */
-int ssh_gss_init(void)
+void ssh_gss_init(void)
{
- return 0;
}
#endif
~mdw / sgt / putty / blobdiff