/** * @brief Init Sec Context * @ingroup globus_gsi_gssapi */ OM_uint32 GSS_CALLCONV gss_init_sec_context( OM_uint32 * minor_status, const gss_cred_id_t initiator_cred_handle, gss_ctx_id_t * context_handle_P, const gss_name_t target_name, const gss_OID mech_type, OM_uint32 req_flags, OM_uint32 time_req, const gss_channel_bindings_t input_chan_bindings, const gss_buffer_t input_token, gss_OID * actual_mech_type, gss_buffer_t output_token, OM_uint32 * ret_flags, OM_uint32 * time_rec) { gss_ctx_id_desc * context = NULL; OM_uint32 major_status = GSS_S_COMPLETE; OM_uint32 local_minor_status; OM_uint32 local_major_status; globus_result_t local_result; int rc; char cbuf[1]; globus_gsi_cert_utils_cert_type_t cert_type; GLOBUS_I_GSI_GSSAPI_DEBUG_ENTER; *minor_status = (OM_uint32) GLOBUS_SUCCESS; output_token->length = 0; context = *context_handle_P; /* module activation if not already done by calling * globus_module_activate */ globus_thread_once( &once_control, globus_l_gsi_gssapi_activate_once); globus_mutex_lock(&globus_i_gssapi_activate_mutex); if (!globus_i_gssapi_active) { globus_module_activate(GLOBUS_GSI_GSSAPI_MODULE); } globus_mutex_unlock(&globus_i_gssapi_activate_mutex); if(req_flags & GSS_C_ANON_FLAG && req_flags & GSS_C_DELEG_FLAG) { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Can't initialize a context to be both anonymous and " "provide delegation"))); goto error_exit; } if(req_flags & GSS_C_GLOBUS_SSL_COMPATIBLE && req_flags & GSS_C_DELEG_FLAG) { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Can't initialize a context to both use SSL compatible " "context establishment and provide delegation"))); goto error_exit; } if(req_flags & GSS_C_DELEG_FLAG && target_name == GSS_C_NO_NAME) { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Need a target name for authorization prior " "to doing delegation"))); goto error_exit; } if ((context == (gss_ctx_id_t) GSS_C_NO_CONTEXT) || !(context->ctx_flags & GSS_I_CTX_INITIALIZED)) { GLOBUS_I_GSI_GSSAPI_DEBUG_FPRINTF( 2, (globus_i_gsi_gssapi_debug_fstream, "Creating context w/ %s.\n", (initiator_cred_handle == GSS_C_NO_CREDENTIAL) ? "GSS_C_NO_CREDENTIAL" : "Credentials provided")); major_status = globus_i_gsi_gss_create_and_fill_context(&local_minor_status, &context, initiator_cred_handle, GSS_C_INITIATE, req_flags); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSS_CONTEXT); goto error_exit; } *context_handle_P = context; if (actual_mech_type != NULL) { *actual_mech_type = (gss_OID) gss_mech_globus_gssapi_openssl; } if (ret_flags != NULL) { *ret_flags = 0 ; } } else { /* first time there is no input token, but after that * there will always be one */ major_status = globus_i_gsi_gss_put_token(&local_minor_status, context, NULL, input_token); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_TOKEN_FAIL); goto error_exit; } } switch (context->gss_state) { case(GSS_CON_ST_HANDSHAKE): /* do the handshake work */ major_status = globus_i_gsi_gss_handshake(&local_minor_status, context); if (major_status == GSS_S_CONTINUE_NEEDED) { break; } if(GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_HANDSHAKE); context->gss_state = GSS_CON_ST_DONE; break; } /* make sure we are talking to the correct server */ major_status = globus_i_gsi_gss_retrieve_peer(&local_minor_status, context, GSS_C_INITIATE); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSS_CONTEXT); context->gss_state = GSS_CON_ST_DONE; break; } local_result = globus_gsi_callback_get_cert_type( context->callback_data, &cert_type); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_CALLBACK_DATA); major_status = GSS_S_FAILURE; goto error_exit; } /* * Need to check if the server is using a limited proxy. * And if that is acceptable here. * Caller tells us if it is not acceptable to * use a limited proxy. */ if ((context->req_flags & GSS_C_GLOBUS_DONT_ACCEPT_LIMITED_PROXY_FLAG) && GLOBUS_GSI_CERT_UTILS_IS_LIMITED_PROXY(cert_type)) { major_status = GSS_S_UNAUTHORIZED; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_PROXY_VIOLATION, (_GGSL("Function set to not accept limited proxies"))); context->gss_state = GSS_CON_ST_DONE; break; } /* this is the mutual authentication test */ if (target_name != NULL) { major_status = gss_compare_name(&local_minor_status, context->peer_cred_handle->globusid, target_name, &rc); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_NAME); context->gss_state = GSS_CON_ST_DONE; break; } else if(rc == GSS_NAMES_NOT_EQUAL) { char * expected_name; char * actual_name; if(g_OID_equal(((gss_name_desc*) target_name)->name_oid, GSS_C_NT_HOSTBASED_SERVICE)) { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_AUTHZ_DENIED, (_GGSL("The expected name for the remote host (%s%s%s) does not match the authenticated " "name of the remote host (%s%s%s). This happens when the name in the host certificate does not match the information obtained from DNS and is often a DNS configuration problem."), target_name->service_name ? target_name->service_name : "", target_name->service_name ? "@" : "", target_name->host_name ? target_name->host_name : "unknown", context->peer_cred_handle->globusid->service_name ? context->peer_cred_handle->globusid->service_name : "", context->peer_cred_handle->globusid->service_name ? "@" : "", context->peer_cred_handle->globusid->host_name ? context->peer_cred_handle->globusid->host_name : "unknown")); } else { expected_name = ((gss_name_desc*) target_name)->x509n_oneline; actual_name = ((gss_name_desc*) context->peer_cred_handle->globusid)->x509n_oneline; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_AUTHZ_DENIED, (_GGSL("The name of the remote entity (%s), and the expected " "name for the remote entity (%s) do not match"), actual_name, expected_name)); } major_status = GSS_S_UNAUTHORIZED; context->gss_state = GSS_CON_ST_DONE; break; } } context->ret_flags |= GSS_C_MUTUAL_FLAG; context->ret_flags |= GSS_C_PROT_READY_FLAG; context->ret_flags |= GSS_C_INTEG_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_ANON_FLAG | GSS_C_DELEG_FLAG; if (GLOBUS_GSI_CERT_UTILS_IS_LIMITED_PROXY(cert_type)) { context->ret_flags |= GSS_C_GLOBUS_RECEIVED_LIMITED_PROXY_FLAG; } # if LINK_WITH_INTERNAL_OPENSSL_API context->ret_flags |= GSS_C_TRANS_FLAG; # endif /* * IF we are talking to a real SSL server, * we don't want to do delegation, so we are done */ if (context->req_flags & GSS_C_GLOBUS_SSL_COMPATIBLE) { context->gss_state = GSS_CON_ST_DONE; break; } /* * If we have completed the handshake, but don't * have any more data to send, we can send the flag * now. i.e. fall through without break, * Otherwise, we will wait for the null byte * to get back in sync which we will ignore */ if (output_token->length != 0) { context->gss_state=GSS_CON_ST_FLAGS; break; } case(GSS_CON_ST_FLAGS): if (input_token->length > 0) { BIO_read(context->gss_sslbio, cbuf, 1); } /* send D if we want delegation, 0 otherwise */ if (context->req_flags & GSS_C_DELEG_FLAG) { BIO_write(context->gss_sslbio, "D", 1); context->gss_state = GSS_CON_ST_REQ; } else { BIO_write(context->gss_sslbio, "0", 1); context->gss_state = GSS_CON_ST_DONE; } break; case(GSS_CON_ST_REQ): local_result = globus_gsi_proxy_inquire_req( context->proxy_handle, context->gss_sslbio); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_PROXY_NOT_RECEIVED); major_status = GSS_S_FAILURE; context->gss_state = GSS_CON_ST_DONE; goto error_exit; } local_result = globus_gsi_cred_get_cert_type( context->cred_handle->cred_handle, &cert_type); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_CREDENTIAL); major_status = GSS_S_FAILURE; context->gss_state = GSS_CON_ST_DONE; goto error_exit; } local_result = globus_gsi_proxy_handle_set_type( context->proxy_handle, (context->req_flags & GSS_C_GLOBUS_DELEGATE_LIMITED_PROXY_FLAG) ? GLOBUS_GSI_CERT_UTILS_TYPE_LIMITED_PROXY : GLOBUS_GSI_CERT_UTILS_TYPE_IMPERSONATION_PROXY); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_PROXY); major_status = GSS_S_FAILURE; context->gss_state = GSS_CON_ST_DONE; goto exit; } local_result = globus_gsi_proxy_sign_req( context->proxy_handle, context->cred_handle->cred_handle, context->gss_sslbio); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_PROXY); major_status = GSS_S_FAILURE; context->gss_state = GSS_CON_ST_DONE; goto error_exit; } context->gss_state = GSS_CON_ST_DONE; break; case(GSS_CON_ST_CERT): ; case(GSS_CON_ST_DONE): ; } /* end of switch for gss_con_st */ local_major_status = globus_i_gsi_gss_get_token(&local_minor_status, context, NULL, output_token); if(GSS_ERROR(local_major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_TOKEN_FAIL); major_status = GSS_S_FAILURE; context->gss_state = GSS_CON_ST_DONE; goto error_exit; } /* some error occurred during switch */ if(GSS_ERROR(major_status)) { goto error_exit; } if (context->gss_state != GSS_CON_ST_DONE) { major_status |= GSS_S_CONTINUE_NEEDED; } else if(time_rec != NULL) { time_t lifetime; time_t current_time; major_status = globus_i_gsi_gss_get_context_goodtill( &local_minor_status, context, &lifetime); if(GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSS_CONTEXT); goto exit; } current_time = time(NULL); if(current_time > lifetime) { *time_rec = 0; } else { *time_rec = (OM_uint32) (lifetime - current_time); } } if (ret_flags != NULL) { *ret_flags = context->ret_flags; } GLOBUS_I_GSI_GSSAPI_DEBUG_FPRINTF( 2, (globus_i_gsi_gssapi_debug_fstream, "init_sec_context:major_status:%08x" ":gss_state:%d req_flags=%08x:ret_flags=%08x\n", (unsigned int) major_status, context->gss_state, (unsigned int) req_flags, (unsigned int) context->ret_flags)); goto exit; error_exit: gss_delete_sec_context(&local_minor_status, (gss_ctx_id_t *) &context, output_token); *context_handle_P = (gss_ctx_id_t) context; exit: GLOBUS_I_GSI_GSSAPI_DEBUG_EXIT; return major_status; }
/** * @brief Export a GSSAPI credential * @ingroup globus_gsi_gssapi_extensions * @details * Saves the credential so it can be checkpointed and * imported by gss_import_cred * * @param minor_status * @param cred_handle * @param desired_mech * Should either be gss_mech_globus_gssapi_openssl or * NULL (in which case gss_mech_globus_gssapi_openssl is * assumed). * @param option_req * @param export_buffer * * @return */ OM_uint32 GSS_CALLCONV gss_export_cred( OM_uint32 * minor_status, const gss_cred_id_t cred_handle, const gss_OID desired_mech, OM_uint32 option_req, gss_buffer_t export_buffer) { OM_uint32 major_status = GLOBUS_SUCCESS; BIO * bp = NULL; gss_cred_id_desc * cred_desc = NULL; globus_result_t local_result; char * proxy_filename = NULL; GLOBUS_I_GSI_GSSAPI_DEBUG_ENTER; cred_desc = (gss_cred_id_desc *) cred_handle; *minor_status = (OM_uint32) GLOBUS_SUCCESS; if (export_buffer == NULL || export_buffer == GSS_C_NO_BUFFER) { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("NULL or empty export_buffer parameter passed to function: %s"), __func__)); goto exit; } export_buffer->length = 0; export_buffer->value = NULL; if (cred_handle == NULL) { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("NULL or empty export_buffer parameter passed to function: %s"), __func__)); goto exit; } if(desired_mech != NULL && g_OID_equal(desired_mech, (gss_OID) gss_mech_globus_gssapi_openssl)) { major_status = GSS_S_BAD_MECH; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_MECH, (_GGSL("The desired mechanism of: %s, is not supported by this " "GSS implementation"), desired_mech->elements)); goto exit; } if(option_req == GSS_IMPEXP_OPAQUE_FORM) { /* When option_req is equal to EXPORT_OPAQUE_FORM (0), it exports * an opaque buffer suitable for storage in memory or on * disk or passing to another process, which * can import the buffer with gss_import_cred(). */ bp = BIO_new(BIO_s_mem()); if(bp == NULL) { GLOBUS_GSI_GSSAPI_OPENSSL_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_OPENSSL, (_GGSL("Couldn't initialize IO bio for exporting credential"))); major_status = GSS_S_FAILURE; goto exit; } local_result = globus_gsi_cred_write(cred_desc->cred_handle, bp); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_IMPEXP_BIO_SSL); major_status = GSS_S_FAILURE; goto exit; } export_buffer->length = BIO_pending(bp); if (export_buffer->length > 0) { export_buffer->value = (char *) malloc(export_buffer->length); if (export_buffer->value == NULL) { export_buffer->length = 0; GLOBUS_GSI_GSSAPI_MALLOC_ERROR(minor_status); major_status = GSS_S_FAILURE; goto exit; } BIO_read(bp, export_buffer->value, export_buffer->length); } else { export_buffer->value = NULL; } major_status = GSS_S_COMPLETE; } else if(option_req == GSS_IMPEXP_MECH_SPECIFIC) { /* With option_req is equal to EXPORT_MECH_SPECIFIC (1), * it exports a buffer filled with mechanism-specific * information that the calling application can use * to pass the credentials to another process that * is not written to the GSS-API. */ local_result = GLOBUS_GSI_SYSCONFIG_GET_UNIQUE_PROXY_FILENAME(&proxy_filename); if(local_result != GLOBUS_SUCCESS) { proxy_filename = NULL; GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_PROXY); major_status = GSS_S_FAILURE; goto exit; } GLOBUS_I_GSI_GSSAPI_DEBUG_FPRINTF( 3, (globus_i_gsi_gssapi_debug_fstream, "Writing exported cred to: %s\n", proxy_filename)); local_result = globus_gsi_cred_write_proxy(cred_desc->cred_handle, proxy_filename); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_PROXY); major_status = GSS_S_FAILURE; goto exit; } export_buffer->value = globus_common_create_string( "X509_USER_PROXY=%s", proxy_filename); export_buffer->length = strlen(export_buffer->value)+1; } else { major_status = GSS_S_FAILURE; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Unrecognized option_req of: %d"), option_req)); goto exit; } exit: if(proxy_filename != NULL) { free(proxy_filename); } if (bp) { BIO_free(bp); } GLOBUS_I_GSI_GSSAPI_DEBUG_EXIT; return major_status; }
/** * Accept a delegated credential. * * This functions drives the accepting side of the credential * delegation process. It is expected to be called in tandem with the * gss_init_delegation function. * * @param minor_status * The minor status returned by this function. This paramter * will be 0 upon success. * @param context_handle * The security context over which the credential is * delegated. * @param extension_oids * A set of extension oids corresponding to buffers in the * extension_buffers paramter below. May be * GSS_C_NO_BUFFER_SET. Currently not used. * @param extension_buffers * A set of extension buffers corresponding to oids in the * extension_oids paramter above. May be * GSS_C_NO_BUFFER_SET. Currently not used. * @param input_token * The token that was produced by a prior call to * gss_init_delegation. * @param req_flags * Flags that modify the behavior of the function. Currently * only GSS_C_GLOBUS_SSL_COMPATIBLE is checked for. This flag * results in tokens that aren't wrapped. * @param time_req * The requested period of validity (seconds) of the delegated * credential. Currently a noop. * @param time_rec * This parameter will contain the received period of validity * of the delegated credential upon success. May be NULL. * @param delegated_cred_handle * This parameter will contain the delegated credential upon * success. * @param mech_type * Returns the security mechanism upon success. Currently not * implemented. May be NULL. * @param output_token * A token that should be passed to gss_init_delegation if the * return value is GSS_S_CONTINUE_NEEDED. * @return * GSS_S_COMPLETE upon successful completion * GSS_S_CONTINUE_NEEDED if the function needs to be called * again. * GSS_S_FAILURE upon failure */ OM_uint32 GSS_CALLCONV gss_accept_delegation( OM_uint32 * minor_status, const gss_ctx_id_t context_handle, const gss_OID_set extension_oids, const gss_buffer_set_t extension_buffers, const gss_buffer_t input_token, OM_uint32 req_flags, OM_uint32 time_req, OM_uint32 * time_rec, gss_cred_id_t * delegated_cred_handle, gss_OID * mech_type, gss_buffer_t output_token) { BIO * bio = NULL; BIO * read_bio = NULL; BIO * write_bio = NULL; X509 * peer_cert = NULL; const EVP_MD * peer_digest; OM_uint32 major_status = GSS_S_COMPLETE; OM_uint32 local_minor_status; globus_result_t local_result = GLOBUS_SUCCESS; gss_ctx_id_desc * context; globus_gsi_cred_handle_t delegated_cred = NULL; char dbuf[1]; static char * _function_name_ = "gss_accept_delegation"; GLOBUS_I_GSI_GSSAPI_DEBUG_ENTER; /* parameter checking goes here */ if(minor_status == NULL) { major_status = GSS_S_FAILURE; goto exit; } *minor_status = (OM_uint32) GLOBUS_SUCCESS; if(context_handle == GSS_C_NO_CONTEXT) { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Invalid context_handle passed to function"))); major_status = GSS_S_FAILURE; goto exit; } context = (gss_ctx_id_desc *) context_handle; if(delegated_cred_handle == NULL) { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Invalid delegated_cred_handle passed to function"))); major_status = GSS_S_FAILURE; goto exit; } if(extension_oids != GSS_C_NO_OID_SET && (extension_buffers == GSS_C_NO_BUFFER_SET || extension_oids->count != extension_buffers->count)) { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Invalid restriction parameters passed to function"))); major_status = GSS_S_FAILURE; goto exit; } if(output_token == GSS_C_NO_BUFFER) { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Invalid output token passed to function"))); major_status = GSS_S_FAILURE; goto exit; } output_token->length = 0; if(input_token == GSS_C_NO_BUFFER) { major_status |= GSS_S_CONTINUE_NEEDED; goto exit; } if(req_flags & GSS_C_GLOBUS_SSL_COMPATIBLE) { bio = BIO_new(BIO_s_mem()); read_bio = bio; write_bio = bio; } else { bio = context->gss_sslbio; } /* lock the context mutex */ globus_mutex_lock(&context->mutex); major_status = globus_i_gsi_gss_put_token(&local_minor_status, context, read_bio, input_token); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_TOKEN_FAIL); goto mutex_unlock; } switch(context->delegation_state) { case GSS_DELEGATION_START: /* generate the proxy */ BIO_read(bio, dbuf, 1); GLOBUS_I_GSI_GSSAPI_DEBUG_FPRINTF( 2, (globus_i_gsi_gssapi_debug_fstream, "delegation flag: %.1s\n", dbuf)); if (dbuf[0] == 'D') { globus_gsi_proxy_handle_attrs_t proxy_handle_attrs; int key_bits; /* * The delegated credential always generated 512 bit keys * irrespective of the key strength of the peer credential (bug * 3794). Fix for that is added below. */ local_result = globus_gsi_cred_get_key_bits( context->peer_cred_handle->cred_handle, &key_bits); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } local_result = globus_gsi_proxy_handle_attrs_init( &proxy_handle_attrs); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } local_result = globus_gsi_proxy_handle_attrs_set_keybits( proxy_handle_attrs, key_bits); if(local_result != GLOBUS_SUCCESS) { globus_gsi_proxy_handle_attrs_destroy(proxy_handle_attrs); GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } local_result = globus_gsi_cred_get_cert( context->peer_cred_handle->cred_handle, &peer_cert); if (local_result != GLOBUS_SUCCESS) { globus_gsi_proxy_handle_attrs_destroy(proxy_handle_attrs); GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } peer_digest = EVP_get_digestbynid( OBJ_obj2nid(peer_cert->sig_alg->algorithm)); local_result = globus_gsi_proxy_handle_attrs_set_signing_algorithm( proxy_handle_attrs, (EVP_MD *) peer_digest); if (local_result != GLOBUS_SUCCESS) { globus_gsi_proxy_handle_attrs_destroy(proxy_handle_attrs); GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } if(context->proxy_handle) { globus_gsi_proxy_handle_destroy(context->proxy_handle); } local_result = globus_gsi_proxy_handle_init( &context->proxy_handle, proxy_handle_attrs); if(local_result != GLOBUS_SUCCESS) { globus_gsi_proxy_handle_attrs_destroy(proxy_handle_attrs); GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } local_result = globus_gsi_proxy_handle_attrs_destroy( proxy_handle_attrs); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } local_result = globus_gsi_proxy_create_req(context->proxy_handle, bio); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION); major_status = GSS_S_FAILURE; goto mutex_unlock; } context->delegation_state = GSS_DELEGATION_COMPLETE_CRED; } else { GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_DELEGATION, (_GGSL("Invalid initial hello message, expecting: 'D', " "received: '%c'"), dbuf[0])); major_status = GSS_S_FAILURE; goto mutex_unlock; } break; case GSS_DELEGATION_COMPLETE_CRED: /* get the signed cert and the key chain and insert them into * the cred structure */ local_result = globus_gsi_proxy_assemble_cred( context->proxy_handle, &delegated_cred, bio); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_PROXY); major_status = GSS_S_FAILURE; goto mutex_unlock; } major_status = globus_i_gsi_gss_create_cred(&local_minor_status, GSS_C_BOTH, delegated_cred_handle, &delegated_cred); if(GSS_ERROR(major_status)) { globus_gsi_cred_handle_destroy(delegated_cred); GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_CREDENTIAL); goto mutex_unlock; } /* reset state machine */ context->delegation_state = GSS_DELEGATION_START; if (time_rec != NULL) { time_t lifetime; local_result = globus_gsi_cred_get_lifetime( ((gss_cred_id_desc *)(*delegated_cred_handle))->cred_handle, &lifetime); if(local_result != GLOBUS_SUCCESS) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_result, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSI_CREDENTIAL); major_status = GSS_S_FAILURE; goto mutex_unlock; } *time_rec = (OM_uint32) lifetime; } case GSS_DELEGATION_SIGN_CERT: case GSS_DELEGATION_DONE: break; } /* returns empty token when there is no output */ major_status = globus_i_gsi_gss_get_token(&local_minor_status, context, write_bio, output_token); if(GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_TOKEN_FAIL); goto mutex_unlock; } if (context->delegation_state != GSS_DELEGATION_START) { major_status |= GSS_S_CONTINUE_NEEDED; } mutex_unlock: if (peer_cert) { X509_free(peer_cert); } globus_mutex_unlock(&context->mutex); exit: if(req_flags & GSS_C_GLOBUS_SSL_COMPATIBLE) { BIO_free(bio); } GLOBUS_I_GSI_GSSAPI_DEBUG_EXIT; return major_status; }
/** * @brief Wrap * @ingroup globus_gsi_gssapi * @details * Wrap a message for integrity and protection. * We do this using the SSLv3 routines, by writing to the * SSL bio, and pulling off the buffer from the back * of the write BIO. But we can't do everything SSL * might want, such as control messages, or segment the messages * here, since we are forced to using the GSSAPI tokens, * and can not communicate directly with our peer. * So there maybe some failures which would work with true * SSL. * * @param minor_status * @param context_handle * @param conf_req_flag * @param qop_req * @param input_message_buffer * @param conf_state * @param output_message_buffer * * @return */ OM_uint32 GSS_CALLCONV gss_wrap( OM_uint32 * minor_status, const gss_ctx_id_t context_handle, int conf_req_flag, gss_qop_t qop_req, const gss_buffer_t input_message_buffer, int * conf_state, gss_buffer_t output_message_buffer) { gss_ctx_id_desc * context = (gss_ctx_id_desc *)context_handle; gss_buffer_desc mic_buf_desc; gss_buffer_t mic_buf = (gss_buffer_desc *) &mic_buf_desc; OM_uint32 major_status = GSS_S_COMPLETE; OM_uint32 local_minor_status; unsigned char * message_value; time_t context_goodtill; static char * _function_name_ = "gss_wrap"; GLOBUS_I_GSI_GSSAPI_DEBUG_ENTER; *minor_status = (OM_uint32) GLOBUS_SUCCESS; if(GLOBUS_I_GSI_GSSAPI_DEBUG(3)) { BIO * debug_bio; fprintf(globus_i_gsi_gssapi_debug_fstream, "input message: length = %u\n" " value = \n", (unsigned) input_message_buffer->length); debug_bio = BIO_new_fp(globus_i_gsi_gssapi_debug_fstream, BIO_NOCLOSE); BIO_dump(debug_bio, input_message_buffer->value, input_message_buffer->length); } output_message_buffer->value = NULL; output_message_buffer->length = 0; GLOBUS_I_GSI_GSSAPI_DEBUG_FPRINTF( 2, (globus_i_gsi_gssapi_debug_fstream, "gss_wrap conf_req_flag=%d qop_req=%d\n", conf_req_flag, (int) qop_req)); if (context_handle == GSS_C_NO_CONTEXT) { major_status = GSS_S_NO_CONTEXT; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_BAD_ARGUMENT, (_GGSL("Invalid context handle passed to function"))); goto exit; } /* lock the context mutex */ globus_mutex_lock(&context->mutex); if(context->ctx_flags & GSS_I_PROTECTION_FAIL_ON_CONTEXT_EXPIRATION) { time_t current_time; current_time = time(NULL); major_status = globus_i_gsi_gss_get_context_goodtill( &local_minor_status, context, &context_goodtill); if(GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_GSS_CONTEXT); goto unlock_mutex_error; } if(current_time > context_goodtill) { major_status = GSS_S_CONTEXT_EXPIRED; GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_EXPIRED_CREDENTIAL, (_GGSL("Expired credential: %s < %s"), ctime(&context_goodtill), ctime(¤t_time))); goto unlock_mutex_error; } } if (conf_req_flag == GSS_INTEGRITY_ONLY && qop_req == GSS_C_QOP_GLOBUS_GSSAPI_OPENSSL_BIG) { /* unlock the context mutex */ globus_mutex_unlock(&context->mutex); major_status = gss_get_mic(&local_minor_status, context_handle, qop_req, input_message_buffer, mic_buf); if (GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_WITH_MIC); goto unlock_mutex_error; } /* lock the context mutex */ globus_mutex_lock(&context->mutex); output_message_buffer->value = (char *) malloc(5 + mic_buf->length + input_message_buffer->length); if (output_message_buffer->value == NULL) { GLOBUS_GSI_GSSAPI_MALLOC_ERROR(minor_status); gss_release_buffer(&local_minor_status, mic_buf); major_status = GSS_S_FAILURE; goto unlock_mutex_error; } output_message_buffer->length = 5 + mic_buf->length + input_message_buffer->length; message_value = output_message_buffer->value; *message_value++ = SSL3_RT_GSSAPI_OPENSSL; *message_value++ = 3; *message_value++ = 0; S2N(mic_buf->length, (char *) message_value); message_value += 2; memcpy(message_value, mic_buf->value, mic_buf->length); message_value = message_value + mic_buf->length; memcpy(message_value, input_message_buffer->value, input_message_buffer->length); if (conf_state) { *conf_state = GSS_INTEGRITY_ONLY; } } else { int rc; rc = SSL_write(context->gss_ssl, input_message_buffer->value, input_message_buffer->length); if (rc != input_message_buffer->length) { /* problem, did not take the whole buffer */ GLOBUS_GSI_GSSAPI_ERROR_RESULT( minor_status, GLOBUS_GSI_GSSAPI_ERROR_WRAP_BIO, (_GGSL("SSL failed wrapping entire message: " "SSL_write wrote %d bytes, should be %d bytes"), rc, input_message_buffer->length)); major_status = GSS_S_FAILURE; goto unlock_mutex_error; } if (conf_state) { if (SSL_CIPHER_get_bits( SSL_get_current_cipher(context->gss_ssl), NULL) == 0) { *conf_state = GSS_INTEGRITY_ONLY; } else { *conf_state = GSS_CONFIDENTIALITY; } } /* get the data from the write BIO */ major_status = globus_i_gsi_gss_get_token(&local_minor_status, context, NULL, output_message_buffer); if(GSS_ERROR(major_status)) { GLOBUS_GSI_GSSAPI_ERROR_CHAIN_RESULT( minor_status, local_minor_status, GLOBUS_GSI_GSSAPI_ERROR_TOKEN_FAIL); goto unlock_mutex_error; } } unlock_mutex_error: globus_mutex_unlock(&context->mutex); exit: GLOBUS_I_GSI_GSSAPI_DEBUG_EXIT; return major_status; }