#include "mod_auth_gssapi.h"
+const gss_OID_desc gss_mech_spnego = {
+ 6, "\x2b\x06\x01\x05\x05\x02"
+};
+
const gss_OID_desc gss_mech_ntlmssp = {
GSS_NTLMSSP_OID_LENGTH, GSS_NTLMSSP_OID_STRING
};
+const gss_OID_set_desc gss_mech_set_ntlmssp = {
+ 1, discard_const(&gss_mech_ntlmssp)
+};
+
#define MOD_AUTH_GSSAPI_VERSION PACKAGE_NAME "/" PACKAGE_VERSION
module AP_MODULE_DECLARE_DATA auth_gssapi_module;
{
struct mag_conn *mc;
- mc = apr_pcalloc(c->pool, sizeof(struct mag_conn));
-
- mc->parent = c->pool;
+ mc = mag_new_conn_ctx(c->pool);
ap_set_module_config(c->conn_config, &auth_gssapi_module, (void*)mc);
return OK;
}
if (mc->ctx) {
(void)gss_delete_sec_context(&min, &mc->ctx, GSS_C_NO_BUFFER);
- mc->established = false;
}
return APR_SUCCESS;
}
+struct mag_conn *mag_new_conn_ctx(apr_pool_t *pool)
+{
+ struct mag_conn *mc;
+
+ mc = apr_pcalloc(pool, sizeof(struct mag_conn));
+ apr_pool_create(&mc->pool, pool);
+ /* register the context in the memory pool, so it can be freed
+ * when the connection/request is terminated */
+ apr_pool_cleanup_register(mc->pool, (void *)mc,
+ mag_conn_destroy, apr_pool_cleanup_null);
+
+ return mc;
+}
+
+static void mag_conn_clear(struct mag_conn *mc)
+{
+ (void)mag_conn_destroy(mc);
+ apr_pool_t *temp;
+
+ apr_pool_clear(mc->pool);
+ temp = mc->pool;
+ memset(mc, 0, sizeof(struct mag_conn));
+ mc->pool = temp;
+}
+
static bool mag_conn_is_https(conn_rec *c)
{
if (mag_is_https) {
struct mag_config *cfg,
gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
- gss_cred_id_t *creds)
+ gss_cred_id_t *creds,
+ gss_OID_set *actual_mechs)
{
uint32_t maj, min;
#ifdef HAVE_CRED_STORE
maj = gss_acquire_cred_from(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
desired_mechs, cred_usage, store, creds,
- NULL, NULL);
+ actual_mechs, NULL);
#else
maj = gss_acquire_cred(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
- desired_mechs, cred_usage, creds, NULL, NULL);
+ desired_mechs, cred_usage, creds,
+ actual_mechs, NULL);
#endif
if (GSS_ERROR(maj)) {
return escaped;
}
-static void mag_store_deleg_creds(request_rec *req,
- char *dir, char *clientname,
- gss_cred_id_t delegated_cred,
- char **ccachefile)
+static char *mag_gss_name_to_ccache_name(request_rec *req,
+ char *dir, const char *gss_name)
{
- gss_key_value_element_desc element;
- gss_key_value_set_desc store;
- char *value;
- uint32_t maj, min;
char *escaped;
/* We need to escape away '/', we can't have path separators in
* a ccache file name */
/* first double escape the esacping char (~) if any */
- escaped = escape(req->pool, clientname, '~', "~~");
- if (!escaped) return;
+ escaped = escape(req->pool, gss_name, '~', "~~");
/* then escape away the separator (/) if any */
escaped = escape(req->pool, escaped, '/', "~");
- if (!escaped) return;
- value = apr_psprintf(req->pool, "FILE:%s/%s", dir, escaped);
+ return apr_psprintf(req->pool, "%s/%s", dir, escaped);
+}
+
+static void mag_set_KRB5CCANME(request_rec *req, char *ccname)
+{
+ apr_status_t status;
+ apr_finfo_t finfo;
+ char *value;
+
+ status = apr_stat(&finfo, ccname, APR_FINFO_MIN, req->pool);
+ if (status != APR_SUCCESS && status != APR_INCOMPLETE) {
+ /* set the file cache anyway, but warn */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "KRB5CCNAME file (%s) lookup failed!", ccname);
+ }
+
+ value = apr_psprintf(req->pool, "FILE:%s", ccname);
+ apr_table_set(req->subprocess_env, "KRB5CCNAME", value);
+}
+static void mag_store_deleg_creds(request_rec *req,
+ char *dir, char *clientname,
+ gss_cred_id_t delegated_cred,
+ char **ccachefile)
+{
+ gss_key_value_element_desc element;
+ gss_key_value_set_desc store;
+ char *ccname;
+ uint32_t maj, min;
element.key = "ccache";
- element.value = value;
store.elements = &element;
store.count = 1;
+ ccname = mag_gss_name_to_ccache_name(req, dir, clientname);
+ element.value = apr_psprintf(req->pool, "FILE:%s", ccname);
+
maj = gss_store_cred_into(&min, delegated_cred, GSS_C_INITIATE,
GSS_C_NULL_OID, 1, 1, &store, NULL, NULL);
if (GSS_ERROR(maj)) {
maj, min));
}
- *ccachefile = value;
+ *ccachefile = ccname;
}
#endif
+static bool parse_auth_header(apr_pool_t *pool, const char **auth_header,
+ gss_buffer_t value)
+{
+ char *auth_header_value;
+
+ auth_header_value = ap_getword_white(pool, auth_header);
+ if (!auth_header_value) return false;
+ value->length = apr_base64_decode_len(auth_header_value) + 1;
+ value->value = apr_pcalloc(pool, value->length);
+ if (!value->value) return false;
+ value->length = apr_base64_decode(value->value, auth_header_value);
+
+ return true;
+}
+
+static bool is_mech_allowed(struct mag_config *cfg, gss_const_OID mech)
+{
+ if (cfg->allowed_mechs == GSS_C_NO_OID_SET) return true;
+
+ for (int i = 0; i < cfg->allowed_mechs->count; i++) {
+ if (gss_oid_equal(&cfg->allowed_mechs->elements[i], mech)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+#define AUTH_TYPE_NEGOTIATE 0
+#define AUTH_TYPE_BASIC 1
+#define AUTH_TYPE_RAW_NTLM 2
+const char *auth_types[] = {
+ "Negotiate",
+ "Basic",
+ "NTLM",
+ NULL
+};
+
+static void mag_set_req_data(request_rec *req,
+ struct mag_config *cfg,
+ struct mag_conn *mc)
+{
+ apr_table_set(req->subprocess_env, "GSS_NAME", mc->gss_name);
+ apr_table_set(req->subprocess_env, "GSS_SESSION_EXPIRATION",
+ apr_psprintf(req->pool,
+ "%ld", (long)mc->expiration));
+ req->ap_auth_type = apr_pstrdup(req->pool,
+ auth_types[mc->auth_type]);
+ req->user = apr_pstrdup(req->pool, mc->user_name);
+ if (cfg->deleg_ccache_dir && mc->delegated) {
+ char *ccname;
+ ccname = mag_gss_name_to_ccache_name(req,
+ cfg->deleg_ccache_dir,
+ mc->gss_name);
+ if (ccname) {
+ mag_set_KRB5CCANME(req, ccname);
+ }
+ }
+}
+
+gss_OID_set mag_filter_unwanted_mechs(gss_OID_set src)
+{
+ gss_const_OID unwanted_mechs[] = {
+ &gss_mech_spnego,
+ gss_mech_krb5_old,
+ gss_mech_krb5_wrong,
+ gss_mech_iakerb,
+ GSS_C_NO_OID
+ };
+ gss_OID_set dst;
+ uint32_t maj, min;
+ int present = 0;
+
+ for (int i = 0; unwanted_mechs[i] != GSS_C_NO_OID; i++) {
+ maj = gss_test_oid_set_member(&min,
+ discard_const(unwanted_mechs[i]),
+ src, &present);
+ if (present) break;
+ }
+ if (present) {
+ maj = gss_create_empty_oid_set(&min, &dst);
+ if (maj != GSS_S_COMPLETE) {
+ return GSS_C_NO_OID_SET;
+ }
+ for (int i = 0; i < src->count; i++) {
+ present = 0;
+ for (int j = 0; unwanted_mechs[j] != GSS_C_NO_OID; j++) {
+ if (gss_oid_equal(&src->elements[i], unwanted_mechs[j])) {
+ present = 1;
+ break;
+ }
+ }
+ if (present) continue;
+ maj = gss_add_oid_set_member(&min, &src->elements[i], &dst);
+ if (maj != GSS_S_COMPLETE) {
+ gss_release_oid_set(&min, &dst);
+ return GSS_C_NO_OID_SET;
+ }
+ }
+ return dst;
+ }
+ return src;
+}
+
+static bool mag_auth_basic(request_rec *req,
+ struct mag_config *cfg,
+ gss_buffer_desc ba_user,
+ gss_buffer_desc ba_pwd,
+ gss_cred_usage_t cred_usage,
+ gss_name_t *client,
+ gss_OID *mech_type,
+ gss_cred_id_t *delegated_cred,
+ uint32_t *vtime)
+{
+#ifdef HAVE_GSS_KRB5_CCACHE_NAME
+ const char *user_ccache = NULL;
+ const char *orig_ccache = NULL;
+ long long unsigned int rndname;
+ apr_status_t rs;
+#endif
+ gss_name_t user = GSS_C_NO_NAME;
+ gss_cred_id_t user_cred = GSS_C_NO_CREDENTIAL;
+ gss_ctx_id_t user_ctx = GSS_C_NO_CONTEXT;
+ gss_name_t server = GSS_C_NO_NAME;
+ gss_cred_id_t server_cred = GSS_C_NO_CREDENTIAL;
+ gss_ctx_id_t server_ctx = GSS_C_NO_CONTEXT;
+ gss_buffer_desc input = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc output = GSS_C_EMPTY_BUFFER;
+ gss_OID_set indicated_mechs = GSS_C_NO_OID_SET;
+ gss_OID_set allowed_mechs;
+ gss_OID_set filtered_mechs;
+ gss_OID_set_desc all_mechs_desc;
+ gss_OID_set actual_mechs = GSS_C_NO_OID_SET;
+ uint32_t init_flags = 0;
+ uint32_t maj, min;
+ bool ret = false;
+
+#ifdef HAVE_GSS_KRB5_CCACHE_NAME
+ rs = apr_generate_random_bytes((unsigned char *)(&rndname),
+ sizeof(long long unsigned int));
+ if (rs != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "Failed to generate random ccache name");
+ goto done;
+ }
+ user_ccache = apr_psprintf(req->pool, "MEMORY:user_%qu", rndname);
+ maj = gss_krb5_ccache_name(&min, user_ccache, &orig_ccache);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "In Basic Auth, %s",
+ mag_error(req, "gss_krb5_ccache_name() "
+ "failed", maj, min));
+ goto done;
+ }
+#endif
+
+ maj = gss_import_name(&min, &ba_user, GSS_C_NT_USER_NAME, &user);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "In Basic Auth, %s",
+ mag_error(req, "gss_import_name() failed",
+ maj, min));
+ goto done;
+ }
+
+ if (cfg->basic_mechs) {
+ allowed_mechs = cfg->basic_mechs;
+ } else if (cfg->allowed_mechs) {
+ allowed_mechs = cfg->allowed_mechs;
+ } else {
+ /* Try to fetch the default set if not explicitly configured,
+ * We need to do this because gss_acquire_cred_with_password()
+ * is currently limited to acquire creds for a single "default"
+ * mechanism if no desired mechanisms are passed in. This causes
+ * authentication to fail for secondary mechanisms as no user
+ * credentials are generated for those. */
+ maj = gss_indicate_mechs(&min, &indicated_mechs);
+ if (maj != GSS_S_COMPLETE) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, req, "%s",
+ mag_error(req, "gss_indicate_mechs() failed",
+ maj, min));
+ /* if indicated _mechs failed, set GSS_C_NO_OID_SET. This
+ * generally causes only the krb5 mechanism to be tried due
+ * to implementation constraints, but may change in future. */
+ allowed_mechs = GSS_C_NO_OID_SET;
+ } else {
+ allowed_mechs = indicated_mechs;
+ }
+ }
+
+ /* Remove Spnego if present, or we'd repeat failed authentiations
+ * multiple times, one within Spnego and then again with an explicit
+ * mechanism. We would normally just force Spnego and use
+ * gss_set_neg_mechs, but due to the way we source the server name
+ * and the fact MIT up to 1.14 at least does no handle union names,
+ * we can't provide spnego with a server name that can be used by
+ * multiple mechanisms, causing any but the first mechanism to fail.
+ * Also remove unwanted krb mechs, or AS requests will be repeated
+ * multiple times uselessly.
+ */
+ filtered_mechs = mag_filter_unwanted_mechs(allowed_mechs);
+ if (filtered_mechs == GSS_C_NO_OID_SET) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, req, "Fatal "
+ "failure while filtering mechs, aborting");
+ goto done;
+ } else if (filtered_mechs != allowed_mechs) {
+ /* if indicated_mechs where sourced then free them here before
+ * reusing the pointer */
+ gss_release_oid_set(&min, &indicated_mechs);
+
+ /* mark the list of mechs needs to be freed */
+ indicated_mechs = filtered_mechs;
+
+ /* use the filtered list */
+ allowed_mechs = filtered_mechs;
+ }
+
+ maj = gss_acquire_cred_with_password(&min, user, &ba_pwd,
+ GSS_C_INDEFINITE,
+ allowed_mechs,
+ GSS_C_INITIATE,
+ &user_cred, &actual_mechs, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "In Basic Auth, %s",
+ mag_error(req, "gss_acquire_cred_with_password() "
+ "failed", maj, min));
+ goto done;
+ }
+
+#ifdef HAVE_CRED_STORE
+ if (cfg->deleg_ccache_dir) {
+ /* delegate ourselves credentials so we store them as requested */
+ init_flags |= GSS_C_DELEG_FLAG;
+ }
+#endif
+
+ for (int i = 0; i < actual_mechs->count; i++) {
+
+ /* skip spnego if present */
+ if (gss_oid_equal(&actual_mechs->elements[i],
+ &gss_mech_spnego)) {
+ continue;
+ }
+
+ /* free these if looping */
+ gss_release_buffer(&min, &output);
+ gss_release_buffer(&min, &input);
+ gss_release_name(&min, &server);
+ gss_release_cred(&min, &server_cred);
+
+ all_mechs_desc.count = 1;
+ all_mechs_desc.elements = &actual_mechs->elements[i];
+ allowed_mechs = &all_mechs_desc;
+
+ /* must acquire with GSS_C_ACCEPT to get the server name */
+ if (!mag_acquire_creds(req, cfg, allowed_mechs,
+ GSS_C_ACCEPT, &server_cred, NULL)) {
+ continue;
+ }
+ maj = gss_inquire_cred(&min, server_cred, &server,
+ NULL, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "%s", mag_error(req, "gss_inquired_cred_() "
+ "failed", maj, min));
+ continue;
+ }
+
+ if (cred_usage == GSS_C_BOTH) {
+ /* reacquire server creds in order to allow delegation */
+ gss_release_cred(&min, &server_cred);
+ if (!mag_acquire_creds(req, cfg, allowed_mechs,
+ GSS_C_BOTH, &server_cred, NULL)) {
+ continue;
+ }
+ }
+
+ do {
+ /* output and input are inverted here, this is intentional */
+ maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
+ &actual_mechs->elements[i], init_flags,
+ 300, GSS_C_NO_CHANNEL_BINDINGS, &output,
+ NULL, &input, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "%s", mag_error(req, "gss_init_sec_context() "
+ "failed", maj, min));
+ break;
+ }
+ gss_release_buffer(&min, &output);
+ maj = gss_accept_sec_context(&min, &server_ctx, server_cred,
+ &input, GSS_C_NO_CHANNEL_BINDINGS,
+ client, mech_type, &output, NULL,
+ vtime, delegated_cred);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "%s", mag_error(req, "gss_accept_sec_context()"
+ " failed", maj, min));
+ break;
+ }
+ gss_release_buffer(&min, &input);
+ } while (maj == GSS_S_CONTINUE_NEEDED);
+
+ if (maj == GSS_S_COMPLETE) {
+ ret = true;
+ break;
+ }
+ }
+
+done:
+ gss_release_buffer(&min, &output);
+ gss_release_buffer(&min, &input);
+ gss_release_name(&min, &server);
+ gss_release_cred(&min, &server_cred);
+ gss_delete_sec_context(&min, &server_ctx, GSS_C_NO_BUFFER);
+ gss_release_name(&min, &user);
+ gss_release_cred(&min, &user_cred);
+ gss_delete_sec_context(&min, &user_ctx, GSS_C_NO_BUFFER);
+ gss_release_oid_set(&min, &actual_mechs);
+ gss_release_oid_set(&min, &indicated_mechs);
+#ifdef HAVE_GSS_KRB5_CCACHE_NAME
+ if (user_ccache != NULL) {
+ maj = gss_krb5_ccache_name(&min, orig_ccache, NULL);
+ if (maj != GSS_S_COMPLETE) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
+ "Failed to restore per-thread ccache, %s",
+ mag_error(req, "gss_krb5_ccache_name() "
+ "failed", maj, min));
+ }
+ }
+#endif
+ return ret;
+}
+
+
static int mag_auth(request_rec *req)
{
const char *type;
- const char *auth_type;
+ int auth_type = -1;
struct mag_config *cfg;
const char *auth_header;
char *auth_header_type;
- char *auth_header_value;
int ret = HTTP_UNAUTHORIZED;
gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
gss_ctx_id_t *pctx;
gss_buffer_desc input = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output = GSS_C_EMPTY_BUFFER;
gss_buffer_desc name = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc ba_user;
+ gss_buffer_desc ba_pwd;
gss_name_t client = GSS_C_NO_NAME;
- gss_cred_id_t user_cred = GSS_C_NO_CREDENTIAL;
gss_cred_id_t acquired_cred = GSS_C_NO_CREDENTIAL;
- gss_cred_id_t server_cred = GSS_C_NO_CREDENTIAL;
gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
gss_cred_usage_t cred_usage = GSS_C_ACCEPT;
- uint32_t flags;
uint32_t vtime;
uint32_t maj, min;
char *reply;
size_t replen;
char *clientname;
gss_OID mech_type = GSS_C_NO_OID;
+ gss_OID_set desired_mechs = GSS_C_NO_OID_SET;
+ gss_OID_set indicated_mechs = GSS_C_NO_OID_SET;
gss_buffer_desc lname = GSS_C_EMPTY_BUFFER;
struct mag_conn *mc = NULL;
- bool is_basic = false;
- gss_ctx_id_t user_ctx = GSS_C_NO_CONTEXT;
- gss_name_t server = GSS_C_NO_NAME;
-#ifdef HAVE_GSS_KRB5_CCACHE_NAME
- const char *user_ccache = NULL;
- const char *orig_ccache = NULL;
-#endif
- uint32_t init_flags = 0;
time_t expiration;
+ int i;
type = ap_auth_type(req);
if ((type == NULL) || (strcasecmp(type, "GSSAPI") != 0)) {
cfg = ap_get_module_config(req->per_dir_config, &auth_gssapi_module);
+ if (cfg->allowed_mechs) {
+ desired_mechs = cfg->allowed_mechs;
+ } else {
+ /* Try to fetch the default set if not explicitly configured */
+ maj = gss_indicate_mechs(&min, &indicated_mechs);
+ if (maj != GSS_S_COMPLETE) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, req, "%s",
+ mag_error(req, "gss_indicate_mechs() failed",
+ maj, min));
+ }
+ desired_mechs = indicated_mechs;
+ }
+
/* implicit auth for subrequests if main auth already happened */
- if (!ap_is_initial_req(req)) {
+ if (!ap_is_initial_req(req) && req->main != NULL) {
type = ap_auth_type(req->main);
if ((type != NULL) && (strcasecmp(type, "GSSAPI") == 0)) {
/* warn if the subrequest location and the main request
mag_check_session(req, cfg, &mc);
}
- if (mc) {
- /* register the context in the memory pool, so it can be freed
- * when the connection/request is terminated */
- apr_pool_userdata_set(mc, "mag_conn_ptr",
- mag_conn_destroy, mc->parent);
+ auth_header = apr_table_get(req->headers_in, "Authorization");
- if (mc->established) {
+ if (mc) {
+ if (mc->established &&
+ (auth_header == NULL) &&
+ (mc->auth_type != AUTH_TYPE_BASIC)) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
"Already established context found!");
- apr_table_set(req->subprocess_env, "GSS_NAME", mc->gss_name);
- apr_table_set(req->subprocess_env, "GSS_SESSION_EXPIRATION",
- apr_psprintf(req->pool,
- "%ld", (long)mc->expiration));
- req->ap_auth_type = apr_pstrdup(req->pool, mc->auth_type);
- req->user = apr_pstrdup(req->pool, mc->user_name);
+ mag_set_req_data(req, cfg, mc);
ret = OK;
goto done;
}
pctx = &ctx;
}
- auth_header = apr_table_get(req->headers_in, "Authorization");
+ /* We can proceed only if we do have an auth header */
if (!auth_header) goto done;
auth_header_type = ap_getword_white(req->pool, &auth_header);
if (!auth_header_type) goto done;
- if (strcasecmp(auth_header_type, "Negotiate") == 0) {
- auth_type = "Negotiate";
-
- auth_header_value = ap_getword_white(req->pool, &auth_header);
- if (!auth_header_value) goto done;
- input.length = apr_base64_decode_len(auth_header_value) + 1;
- input.value = apr_pcalloc(req->pool, input.length);
- if (!input.value) goto done;
- input.length = apr_base64_decode(input.value, auth_header_value);
- } else if ((strcasecmp(auth_header_type, "Basic") == 0) &&
- (cfg->use_basic_auth == true)) {
- auth_type = "Basic";
- is_basic = true;
+ for (i = 0; auth_types[i] != NULL; i++) {
+ if (strcasecmp(auth_header_type, auth_types[i]) == 0) {
+ auth_type = i;
+ break;
+ }
+ }
- gss_buffer_desc ba_user;
- gss_buffer_desc ba_pwd;
+ switch (auth_type) {
+ case AUTH_TYPE_NEGOTIATE:
+ if (!parse_auth_header(req->pool, &auth_header, &input)) {
+ goto done;
+ }
+ break;
+ case AUTH_TYPE_BASIC:
+ if (!cfg->use_basic_auth) {
+ goto done;
+ }
ba_pwd.value = ap_pbase64decode(req->pool, auth_header);
if (!ba_pwd.value) goto done;
}
ba_user.length = strlen(ba_user.value);
ba_pwd.length = strlen(ba_pwd.value);
- maj = gss_import_name(&min, &ba_user, GSS_C_NT_USER_NAME, &client);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "In Basic Auth, %s",
- mag_error(req, "gss_import_name() failed",
- maj, min));
- goto done;
- }
-#ifdef HAVE_GSS_KRB5_CCACHE_NAME
- /* Set a per-thread ccache in case we are using kerberos,
- * it is not elegant but avoids interference between threads */
- long long unsigned int rndname;
- apr_status_t rs;
- rs = apr_generate_random_bytes((unsigned char *)(&rndname),
- sizeof(long long unsigned int));
- if (rs != APR_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "Failed to generate random ccache name");
+
+ if (mc && mc->established &&
+ mag_basic_check(cfg, mc, ba_user, ba_pwd)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
+ "Already established BASIC AUTH context found!");
+ mag_set_req_data(req, cfg, mc);
+ ret = OK;
goto done;
}
- user_ccache = apr_psprintf(req->pool, "MEMORY:user_%qu", rndname);
- maj = gss_krb5_ccache_name(&min, user_ccache, &orig_ccache);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "In Basic Auth, %s",
- mag_error(req, "gss_krb5_ccache_name() "
- "failed", maj, min));
+
+ break;
+
+ case AUTH_TYPE_RAW_NTLM:
+ if (!is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
+ "NTLM Authentication is not allowed!");
goto done;
}
-#endif
- maj = gss_acquire_cred_with_password(&min, client, &ba_pwd,
- GSS_C_INDEFINITE,
- cfg->allowed_mechs,
- GSS_C_INITIATE,
- &user_cred, NULL, NULL);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "In Basic Auth, %s",
- mag_error(req, "gss_acquire_cred_with_password() "
- "failed", maj, min));
+
+ if (!parse_auth_header(req->pool, &auth_header, &input)) {
goto done;
}
- gss_release_name(&min, &client);
- } else {
+
+ desired_mechs = discard_const(&gss_mech_set_ntlmssp);
+ break;
+
+ default:
goto done;
}
- req->ap_auth_type = apr_pstrdup(req->pool, auth_type);
+ if (mc && mc->established) {
+ /* if we are re-authenticating make sure the conn context
+ * is cleaned up so we do not accidentally reuse an existing
+ * established context */
+ mag_conn_clear(mc);
+ }
+
+ req->ap_auth_type = apr_pstrdup(req->pool, auth_types[auth_type]);
#ifdef HAVE_CRED_STORE
if (cfg->use_s4u2proxy) {
cred_usage = GSS_C_BOTH;
}
#endif
- if (!mag_acquire_creds(req, cfg, GSS_C_NO_OID_SET,
- cred_usage, &acquired_cred)) {
+ if (auth_type == AUTH_TYPE_BASIC) {
+ if (mag_auth_basic(req, cfg, ba_user, ba_pwd,
+ cred_usage, &client, &mech_type,
+ &delegated_cred, &vtime)) {
+ goto complete;
+ }
goto done;
}
- if (is_basic) {
- if (cred_usage == GSS_C_BOTH) {
- /* If GSS_C_BOTH is used then inquire_cred will return the client
- * name instead of the SPN of the server credentials. Therefore we
- * need to acquire a different set of credential setting
- * GSS_C_ACCEPT explicitly */
- if (!mag_acquire_creds(req, cfg, GSS_C_NO_OID_SET,
- GSS_C_ACCEPT, &server_cred)) {
- goto done;
- }
- } else {
- server_cred = acquired_cred;
- }
- maj = gss_inquire_cred(&min, server_cred, &server,
- NULL, NULL, NULL);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "%s", mag_error(req, "gss_inquired_cred_() "
- "failed", maj, min));
- goto done;
- }
- if (server_cred != acquired_cred) {
- gss_release_cred(&min, &server_cred);
- }
-
-#ifdef HAVE_CRED_STORE
- if (cfg->deleg_ccache_dir) {
- /* delegate ourselves credentials so we store them as requested */
- init_flags |= GSS_C_DELEG_FLAG;
- }
-#endif
-
- /* output and input are inverted here, this is intentional */
- maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
- GSS_C_NO_OID, init_flags, 300,
- GSS_C_NO_CHANNEL_BINDINGS, &output,
- NULL, &input, NULL, NULL);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "%s", mag_error(req, "gss_init_sec_context() "
- "failed", maj, min));
- goto done;
- }
+ if (!mag_acquire_creds(req, cfg, desired_mechs,
+ cred_usage, &acquired_cred, NULL)) {
+ goto done;
}
- if (!is_basic && cfg->allowed_mechs != GSS_C_NO_OID_SET) {
+ if (auth_type == AUTH_TYPE_NEGOTIATE &&
+ cfg->allowed_mechs != GSS_C_NO_OID_SET) {
maj = gss_set_neg_mechs(&min, acquired_cred, cfg->allowed_mechs);
if (GSS_ERROR(maj)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
maj = gss_accept_sec_context(&min, pctx, acquired_cred,
&input, GSS_C_NO_CHANNEL_BINDINGS,
- &client, &mech_type, &output, &flags, &vtime,
+ &client, &mech_type, &output, NULL, &vtime,
&delegated_cred);
if (GSS_ERROR(maj)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
mag_error(req, "gss_accept_sec_context() failed",
maj, min));
goto done;
- }
- if (is_basic) {
- while (maj == GSS_S_CONTINUE_NEEDED) {
- gss_release_buffer(&min, &input);
- /* output and input are inverted here, this is intentional */
- maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
- GSS_C_NO_OID, init_flags, 300,
- GSS_C_NO_CHANNEL_BINDINGS, &output,
- NULL, &input, NULL, NULL);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "%s", mag_error(req, "gss_init_sec_context() "
- "failed", maj, min));
- goto done;
- }
- gss_release_buffer(&min, &output);
- maj = gss_accept_sec_context(&min, pctx, acquired_cred,
- &input, GSS_C_NO_CHANNEL_BINDINGS,
- &client, &mech_type, &output, &flags,
- &vtime, &delegated_cred);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "%s", mag_error(req, "gss_accept_sec_context()"
- " failed", maj, min));
- goto done;
- }
- }
} else if (maj == GSS_S_CONTINUE_NEEDED) {
if (!mc) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
"Mechanism needs continuation but neither "
"GssapiConnectionBound nor "
"GssapiUseSessions are available");
- gss_delete_sec_context(&min, pctx, GSS_C_NO_BUFFER);
gss_release_buffer(&min, &output);
output.length = 0;
}
goto done;
}
+complete:
/* Always set the GSS name in an env var */
maj = gss_display_name(&min, client, &name, NULL);
if (GSS_ERROR(maj)) {
delegated_cred, &ccachefile);
if (ccachefile) {
- apr_table_set(req->subprocess_env, "KRB5CCNAME", ccachefile);
+ mag_set_KRB5CCANME(req, ccachefile);
+ }
+
+ if (mc) {
+ mc->delegated = true;
}
}
#endif
}
if (mc) {
- mc->user_name = apr_pstrdup(mc->parent, req->user);
- mc->gss_name = apr_pstrdup(mc->parent, clientname);
+ mc->user_name = apr_pstrdup(mc->pool, req->user);
+ mc->gss_name = apr_pstrdup(mc->pool, clientname);
mc->established = true;
if (vtime == GSS_C_INDEFINITE || vtime < MIN_SESS_EXP_TIME) {
vtime = MIN_SESS_EXP_TIME;
}
mc->expiration = expiration;
+ mc->auth_type = auth_type;
+ if (auth_type == AUTH_TYPE_BASIC) {
+ mag_basic_cache(cfg, mc, ba_user, ba_pwd);
+ }
if (cfg->use_sessions) {
mag_attempt_session(req, cfg, mc);
}
- mc->auth_type = auth_type;
}
if (cfg->send_persist)
ret = OK;
done:
- if ((!is_basic) && (output.length != 0)) {
+ if ((auth_type != AUTH_TYPE_BASIC) && (output.length != 0)) {
+ int prefixlen = strlen(auth_types[auth_type]) + 1;
replen = apr_base64_encode_len(output.length) + 1;
- reply = apr_pcalloc(req->pool, 10 + replen);
+ reply = apr_pcalloc(req->pool, prefixlen + replen);
if (reply) {
- memcpy(reply, "Negotiate ", 10);
- apr_base64_encode(&reply[10], output.value, output.length);
+ memcpy(reply, auth_types[auth_type], prefixlen - 1);
+ reply[prefixlen - 1] = ' ';
+ apr_base64_encode(&reply[prefixlen], output.value, output.length);
apr_table_add(req->err_headers_out,
"WWW-Authenticate", reply);
}
} else if (ret == HTTP_UNAUTHORIZED) {
- apr_table_add(req->err_headers_out,
- "WWW-Authenticate", "Negotiate");
+ apr_table_add(req->err_headers_out, "WWW-Authenticate", "Negotiate");
+ if (is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
+ apr_table_add(req->err_headers_out, "WWW-Authenticate", "NTLM");
+ }
if (cfg->use_basic_auth) {
apr_table_add(req->err_headers_out,
"WWW-Authenticate",
ap_auth_name(req)));
}
}
-#ifdef HAVE_GSS_KRB5_CCACHE_NAME
- if (user_ccache != NULL) {
- maj = gss_krb5_ccache_name(&min, orig_ccache, NULL);
- if (maj != GSS_S_COMPLETE) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
- "Failed to restore per-thread ccache, %s",
- mag_error(req, "gss_krb5_ccache_name() "
- "failed", maj, min));
- }
- }
-#endif
- gss_delete_sec_context(&min, &user_ctx, &output);
- gss_release_cred(&min, &user_cred);
+ gss_release_oid_set(&min, &indicated_mechs);
+ if (ctx != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&min, &ctx, GSS_C_NO_BUFFER);
gss_release_cred(&min, &acquired_cred);
gss_release_cred(&min, &delegated_cred);
gss_release_buffer(&min, &output);
gss_release_name(&min, &client);
- gss_release_name(&min, &server);
gss_release_buffer(&min, &name);
gss_release_buffer(&min, &lname);
return ret;
}
#endif
+#ifdef HAVE_GSS_ACQUIRE_CRED_WITH_PASSWORD
static const char *mag_use_basic_auth(cmd_parms *parms, void *mconfig, int on)
{
struct mag_config *cfg = (struct mag_config *)mconfig;
cfg->use_basic_auth = on ? true : false;
return NULL;
}
+#endif
#define MAX_ALLOWED_MECHS 10
-static const char *mag_allow_mech(cmd_parms *parms, void *mconfig,
- const char *w)
+static void mag_list_of_mechs(cmd_parms *parms, gss_OID_set *oidset,
+ bool add_spnego, const char *w)
{
- struct mag_config *cfg = (struct mag_config *)mconfig;
gss_const_OID oid;
+ gss_OID_set set;
size_t size;
- if (!cfg->allowed_mechs) {
- cfg->allowed_mechs = apr_pcalloc(parms->pool,
- sizeof(gss_OID_set_desc));
+ if (NULL == *oidset) {
+ set = apr_pcalloc(parms->pool, sizeof(gss_OID_set_desc));
size = sizeof(gss_OID) * MAX_ALLOWED_MECHS;
- cfg->allowed_mechs->elements = apr_palloc(parms->pool, size);
+ set->elements = apr_palloc(parms->pool, size);
+ if (add_spnego) {
+ set->elements[0] = gss_mech_spnego;
+ set->count++;
+ }
+ *oidset = set;
+ } else {
+ set = *oidset;
}
if (strcmp(w, "krb5") == 0) {
} else {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
"Unrecognized GSSAPI Mechanism: %s", w);
- return NULL;
+ return;
}
- if (cfg->allowed_mechs->count >= MAX_ALLOWED_MECHS) {
+ if (set->count >= MAX_ALLOWED_MECHS) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
"Too many GssapiAllowedMech options (MAX: %d)",
MAX_ALLOWED_MECHS);
- return NULL;
+ return;
}
- cfg->allowed_mechs->elements[cfg->allowed_mechs->count] = *oid;
- cfg->allowed_mechs->count++;
+ set->elements[set->count] = *oid;
+ set->count++;
+}
+
+static const char *mag_allow_mech(cmd_parms *parms, void *mconfig,
+ const char *w)
+{
+ struct mag_config *cfg = (struct mag_config *)mconfig;
+
+ mag_list_of_mechs(parms, &cfg->allowed_mechs, true, w);
+
+ return NULL;
+}
+
+#ifdef HAVE_GSS_ACQUIRE_CRED_WITH_PASSWORD
+static const char *mag_basic_auth_mechs(cmd_parms *parms, void *mconfig,
+ const char *w)
+{
+ struct mag_config *cfg = (struct mag_config *)mconfig;
+
+ mag_list_of_mechs(parms, &cfg->basic_mechs, false, w);
return NULL;
}
+#endif
static const command_rec mag_commands[] = {
AP_INIT_FLAG("GssapiSSLonly", mag_ssl_only, NULL, OR_AUTHCFG,
#ifdef HAVE_GSS_ACQUIRE_CRED_WITH_PASSWORD
AP_INIT_FLAG("GssapiBasicAuth", mag_use_basic_auth, NULL, OR_AUTHCFG,
"Allows use of Basic Auth for authentication"),
+ AP_INIT_ITERATE("GssapiBasicAuthMech", mag_basic_auth_mechs, NULL,
+ OR_AUTHCFG, "Mechanisms to use for basic auth"),
#endif
AP_INIT_ITERATE("GssapiAllowedMech", mag_allow_mech, NULL, OR_AUTHCFG,
"Allowed Mechanisms"),