#include "mod_auth_gssapi.h"
+#define MOD_AUTH_GSSAPI_VERSION PACKAGE_NAME "/" PACKAGE_VERSION
module AP_MODULE_DECLARE_DATA auth_gssapi_module;
+APLOG_USE_MODULE(auth_gssapi);
+
APR_DECLARE_OPTIONAL_FN(int, ssl_is_https, (conn_rec *));
static char *mag_status(request_rec *req, int type, uint32_t err)
/* FIXME: create mutex to deal with connections and contexts ? */
mag_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
mag_post_config_session();
+ ap_add_version_component(cfgpool, MOD_AUTH_GSSAPI_VERSION);
return OK;
}
static int mag_auth(request_rec *req)
{
const char *type;
+ const char *auth_type;
struct mag_config *cfg;
const char *auth_header;
char *auth_header_type;
gss_buffer_desc output = GSS_C_EMPTY_BUFFER;
gss_buffer_desc name = GSS_C_EMPTY_BUFFER;
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 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;
gss_OID mech_type = GSS_C_NO_OID;
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
type = ap_auth_type(req);
if ((type == NULL) || (strcasecmp(type, "GSSAPI") != 0)) {
}
/* if available, session always supersedes connection bound data */
- mag_check_session(req, cfg, &mc);
+ if (cfg->use_sessions) {
+ mag_check_session(req, cfg, &mc);
+ }
if (mc) {
/* register the context in the memory pool, so it can be freed
ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, req,
"Already established context found!");
apr_table_set(req->subprocess_env, "GSS_NAME", mc->gss_name);
- req->ap_auth_type = apr_pstrdup(req->pool, "Negotiate");
+ req->ap_auth_type = apr_pstrdup(req->pool, mc->auth_type);
req->user = apr_pstrdup(req->pool, mc->user_name);
ret = OK;
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) 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;
+
+ gss_buffer_desc ba_user;
+ gss_buffer_desc ba_pwd;
+
+ ba_pwd.value = ap_pbase64decode(req->pool, auth_header);
+ if (!ba_pwd.value) goto done;
+ ba_user.value = ap_getword_nulls_nc(req->pool,
+ (char **)&ba_pwd.value, ':');
+ if (!ba_user.value) goto done;
+ if (((char *)ba_user.value)[0] == '\0' ||
+ ((char *)ba_pwd.value)[0] == '\0') {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "Invalid empty user or password for Basic Auth");
+ 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|APLOG_NOERRNO, 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|APLOG_NOERRNO, 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|APLOG_NOERRNO, 0, req,
+ "In Basic Auth, %s",
+ mag_error(req, "gss_krb5_ccache_name() "
+ "failed", maj, min));
+ goto done;
+ }
+#endif
+ maj = gss_acquire_cred_with_password(&min, client, &ba_pwd,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET,
+ GSS_C_INITIATE,
+ &user_cred, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "In Basic Auth, %s",
+ mag_error(req, "gss_acquire_cred_with_password() "
+ "failed", maj, min));
+ goto done;
+ }
+ gss_release_name(&min, &client);
+ } else {
+ goto done;
+ }
- 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);
+ req->ap_auth_type = apr_pstrdup(req->pool, auth_type);
#ifdef HAVE_GSS_ACQUIRE_CRED_FROM
if (cfg->use_s4u2proxy) {
- maj = gss_acquire_cred_from(&min, GSS_C_NO_NAME, 0,
- GSS_C_NO_OID_SET, GSS_C_BOTH,
+ cred_usage = GSS_C_BOTH;
+ }
+ if (cfg->cred_store) {
+ maj = gss_acquire_cred_from(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET, cred_usage,
cfg->cred_store, &acquired_cred,
NULL, NULL);
if (GSS_ERROR(maj)) {
}
#endif
+ if (is_basic) {
+ if (!acquired_cred) {
+ /* Try to acquire default creds */
+ maj = gss_acquire_cred(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET, cred_usage,
+ &acquired_cred, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "%s", mag_error(req, "gss_acquire_cred_from()"
+ " failed", maj, min));
+ goto done;
+ }
+ }
+ maj = gss_inquire_cred(&min, acquired_cred, &server,
+ NULL, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "%s", mag_error(req, "gss_inquired_cred_() "
+ "failed", maj, min));
+ goto done;
+ }
+ /* output and input are inverted here, this is intentional */
+ maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
+ GSS_C_NO_OID, 0, 300,
+ GSS_C_NO_CHANNEL_BINDINGS, &output,
+ NULL, &input, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "%s", mag_error(req, "gss_init_sec_context() "
+ "failed", maj, min));
+ goto done;
+ }
+ }
+
maj = gss_accept_sec_context(&min, pctx, acquired_cred,
&input, GSS_C_NO_CHANNEL_BINDINGS,
&client, &mech_type, &output, &flags, &vtime,
maj, min));
goto done;
}
-
- if (maj == GSS_S_CONTINUE_NEEDED) {
+ 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, 0, 300,
+ GSS_C_NO_CHANNEL_BINDINGS, &output,
+ NULL, &input, NULL, NULL);
+ if (GSS_ERROR(maj)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 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|APLOG_NOERRNO, 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|APLOG_NOERRNO, 0, req,
"Mechanism needs continuation but neither "
goto done;
}
- req->ap_auth_type = apr_pstrdup(req->pool, "Negotiate");
-
/* Always set the GSS name in an env var */
maj = gss_display_name(&min, client, &name, NULL);
if (GSS_ERROR(maj)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req, "%s",
- mag_error(req, "gss_accept_sec_context() failed",
+ mag_error(req, "gss_display_name() failed",
maj, min));
goto done;
}
vtime = MIN_SESS_EXP_TIME;
}
mc->expiration = time(NULL) + vtime;
- mag_attempt_session(req, cfg, mc);
+ if (cfg->use_sessions) {
+ mag_attempt_session(req, cfg, mc);
+ }
+ mc->auth_type = auth_type;
}
ret = OK;
} else {
apr_table_add(req->err_headers_out,
"WWW-Authenticate", "Negotiate");
+ if (cfg->use_basic_auth) {
+ apr_table_add(req->err_headers_out,
+ "WWW-Authenticate",
+ apr_psprintf(req->pool, "Basic realm=\"%s\"",
+ 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|APLOG_NOERRNO, 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_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;
return NULL;
}
+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;
+}
+
static const command_rec mag_commands[] = {
AP_INIT_FLAG("GssapiSSLonly", mag_ssl_only, NULL, OR_AUTHCFG,
"Work only if connection is SSL Secured"),
AP_INIT_FLAG("GssapiLocalName", mag_map_to_local, NULL, OR_AUTHCFG,
- "Work only if connection is SSL Secured"),
+ "Translate principals to local names"),
AP_INIT_FLAG("GssapiConnectionBound", mag_conn_ctx, NULL, OR_AUTHCFG,
"Authentication is bound to the TCP connection"),
AP_INIT_FLAG("GssapiUseSessions", mag_use_sess, NULL, OR_AUTHCFG,
AP_INIT_RAW_ARGS("GssapiDelegCcacheDir", mag_deleg_ccache_dir, NULL,
OR_AUTHCFG, "Directory to store delegated credentials"),
#endif
+#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"),
+#endif
{ NULL }
};
projects / mod_auth_gssapi.git / blobdiff