# Structures and macros ## Topics ### Structures [`gss_krb5_cfx_keydata`](/documentation/GSS/gss_krb5_cfx_keydata) [`gss_krb5_lucid_context_v1`](/documentation/GSS/gss_krb5_lucid_context_v1) [`gss_krb5_lucid_context_version`](/documentation/GSS/gss_krb5_lucid_context_version) [`gss_krb5_lucid_key`](/documentation/GSS/gss_krb5_lucid_key) [`gss_krb5_rfc1964_keydata`](/documentation/GSS/gss_krb5_rfc1964_keydata) ### Macros [`GSSKRB5_FUNCTION_DEPRECATED`](/documentation/GSS/GSSKRB5_FUNCTION_DEPRECATED) [`GSS_C_ATTR_LOCAL_LOGIN_USER`](/documentation/GSS/GSS_C_ATTR_LOCAL_LOGIN_USER) [`GSS_C_CRED_DIAG`](/documentation/GSS/GSS_C_CRED_DIAG) [`GSS_C_CRED_GET_DEFAULT`](/documentation/GSS/GSS_C_CRED_GET_DEFAULT) [`GSS_C_CRED_RENEW`](/documentation/GSS/GSS_C_CRED_RENEW) [`GSS_C_CRED_SET_DEFAULT`](/documentation/GSS/GSS_C_CRED_SET_DEFAULT) [`GSS_C_CRED_VALIDATE`](/documentation/GSS/GSS_C_CRED_VALIDATE) [`GSS_C_CTX_PFS_X`](/documentation/GSS/GSS_C_CTX_PFS_X) [`GSS_C_INQ_SSPI_SESSION_KEY`](/documentation/GSS/GSS_C_INQ_SSPI_SESSION_KEY) [`GSS_C_INQ_WIN2K_PAC_X`](/documentation/GSS/GSS_C_INQ_WIN2K_PAC_X) [`GSS_C_NO_OID_SET`](/documentation/GSS/GSS_C_NO_OID_SET) [`GSS_C_NTLM_FORCE_V1`](/documentation/GSS/GSS_C_NTLM_FORCE_V1) [`GSS_C_NTLM_GUEST`](/documentation/GSS/GSS_C_NTLM_GUEST) [`GSS_C_NTLM_RESET_KEYS`](/documentation/GSS/GSS_C_NTLM_RESET_KEYS) [`GSS_C_NTLM_SESSION_KEY`](/documentation/GSS/GSS_C_NTLM_SESSION_KEY) [`GSS_C_NTLM_SUPPORT_CHANNELBINDINGS`](/documentation/GSS/GSS_C_NTLM_SUPPORT_CHANNELBINDINGS) [`GSS_C_NTLM_SUPPORT_LM2`](/documentation/GSS/GSS_C_NTLM_SUPPORT_LM2) [`GSS_C_NTLM_V1`](/documentation/GSS/GSS_C_NTLM_V1) [`GSS_C_NTLM_V2`](/documentation/GSS/GSS_C_NTLM_V2) [`GSS_C_NT_DN`](/documentation/GSS/GSS_C_NT_DN) [`GSS_C_NT_NTLM`](/documentation/GSS/GSS_C_NT_NTLM) [`GSS_C_NT_UUID`](/documentation/GSS/GSS_C_NT_UUID) [`GSS_C_NULL_OID`](/documentation/GSS/GSS_C_NULL_OID) [`GSS_C_NULL_OID_SET`](/documentation/GSS/GSS_C_NULL_OID_SET) [`GSS_C_PEER_HAS_UPDATED_SPNEGO`](/documentation/GSS/GSS_C_PEER_HAS_UPDATED_SPNEGO) [`GSS_IOV_BUFFER_FLAGS`](/documentation/GSS/GSS_IOV_BUFFER_FLAGS) [`GSS_IOV_BUFFER_TYPE`](/documentation/GSS/GSS_IOV_BUFFER_TYPE) [`GSS_KRB5_CCACHE_NAME_X`](/documentation/GSS/GSS_KRB5_CCACHE_NAME_X) [`GSS_KRB5_COMPAT_DES3_MIC_X`](/documentation/GSS/GSS_KRB5_COMPAT_DES3_MIC_X) [`GSS_KRB5_COPY_CCACHE_X`](/documentation/GSS/GSS_KRB5_COPY_CCACHE_X) [`GSS_KRB5_CRED_NO_CI_FLAGS_X`](/documentation/GSS/GSS_KRB5_CRED_NO_CI_FLAGS_X) [`GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X`](/documentation/GSS/GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X) [`GSS_KRB5_EXPORT_LUCID_CONTEXT_X`](/documentation/GSS/GSS_KRB5_EXPORT_LUCID_CONTEXT_X) [`GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X`](/documentation/GSS/GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X) [`GSS_KRB5_GET_ACCEPTOR_SUBKEY_X`](/documentation/GSS/GSS_KRB5_GET_ACCEPTOR_SUBKEY_X) [`GSS_KRB5_GET_AUTHTIME_X`](/documentation/GSS/GSS_KRB5_GET_AUTHTIME_X) [`GSS_KRB5_GET_INITIATOR_SUBKEY_X`](/documentation/GSS/GSS_KRB5_GET_INITIATOR_SUBKEY_X) [`GSS_KRB5_GET_SERVICE_KEYBLOCK_X`](/documentation/GSS/GSS_KRB5_GET_SERVICE_KEYBLOCK_X) [`GSS_KRB5_GET_SUBKEY_X`](/documentation/GSS/GSS_KRB5_GET_SUBKEY_X) [`GSS_KRB5_GET_TIME_OFFSET_X`](/documentation/GSS/GSS_KRB5_GET_TIME_OFFSET_X) [`GSS_KRB5_GET_TKT_FLAGS_X`](/documentation/GSS/GSS_KRB5_GET_TKT_FLAGS_X) [`GSS_KRB5_IMPORT_CRED_X`](/documentation/GSS/GSS_KRB5_IMPORT_CRED_X) [`GSS_KRB5_NT_MACHINE_UID_NAME`](/documentation/GSS/GSS_KRB5_NT_MACHINE_UID_NAME) [`GSS_KRB5_NT_PRINCIPAL_NAME_REFERRAL`](/documentation/GSS/GSS_KRB5_NT_PRINCIPAL_NAME_REFERRAL) [`GSS_KRB5_NT_STRING_UID_NAME`](/documentation/GSS/GSS_KRB5_NT_STRING_UID_NAME) [`GSS_KRB5_NT_USER_NAME`](/documentation/GSS/GSS_KRB5_NT_USER_NAME) [`GSS_KRB5_PLUGIN_REGISTER_X`](/documentation/GSS/GSS_KRB5_PLUGIN_REGISTER_X) [`GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X`](/documentation/GSS/GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X) [`GSS_KRB5_SEND_TO_KDC_X`](/documentation/GSS/GSS_KRB5_SEND_TO_KDC_X) [`GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X`](/documentation/GSS/GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X) [`GSS_KRB5_SET_DEFAULT_REALM_X`](/documentation/GSS/GSS_KRB5_SET_DEFAULT_REALM_X) [`GSS_KRB5_SET_DNS_CANONICALIZE_X`](/documentation/GSS/GSS_KRB5_SET_DNS_CANONICALIZE_X) [`GSS_KRB5_SET_TIME_OFFSET_X`](/documentation/GSS/GSS_KRB5_SET_TIME_OFFSET_X) [`GSS_NTLM_GET_SESSION_KEY_X`](/documentation/GSS/GSS_NTLM_GET_SESSION_KEY_X) [`HEIMDAL_PRINTF_ATTRIBUTE`](/documentation/GSS/HEIMDAL_PRINTF_ATTRIBUTE) [`gss_iter_OID`](/documentation/GSS/gss_iter_OID) [`gss_krb5_nt_general_name`](/documentation/GSS/gss_krb5_nt_general_name) [`gss_mech_krb5`](/documentation/GSS/gss_mech_krb5) [`gss_mech_spnego`](/documentation/GSS/gss_mech_spnego) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)