]> code.delx.au - gnu-emacs/blobdiff - src/gnutls.c
Update copyright year to 2015
[gnu-emacs] / src / gnutls.c
index 7c61445de92d2c637180286fb0e2b70577570013..4d248f868781c3553333f1dc8e0ac28a6d006a8a 100644 (file)
@@ -1,5 +1,5 @@
 /* GnuTLS glue for GNU Emacs.
-   Copyright (C) 2010-2014 Free Software Foundation, Inc.
+   Copyright (C) 2010-2015 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -22,6 +22,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "lisp.h"
 #include "process.h"
+#include "gnutls.h"
 #include "coding.h"
 
 #ifdef HAVE_GNUTLS
@@ -70,126 +71,130 @@ enum extra_peer_verification
 \f
 #ifdef WINDOWSNT
 
-/* Macro for defining functions that will be loaded from the GnuTLS DLL.  */
-#define DEF_GNUTLS_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args
+DEF_DLL_FN (gnutls_alert_description_t, gnutls_alert_get,
+           (gnutls_session_t));
+DEF_DLL_FN (const char *, gnutls_alert_get_name,
+           (gnutls_alert_description_t));
+DEF_DLL_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int));
+DEF_DLL_FN (int, gnutls_anon_allocate_client_credentials,
+           (gnutls_anon_client_credentials_t *));
+DEF_DLL_FN (void, gnutls_anon_free_client_credentials,
+           (gnutls_anon_client_credentials_t));
+DEF_DLL_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t));
+DEF_DLL_FN (int, gnutls_certificate_allocate_credentials,
+           (gnutls_certificate_credentials_t *));
+DEF_DLL_FN (void, gnutls_certificate_free_credentials,
+           (gnutls_certificate_credentials_t));
+DEF_DLL_FN (const gnutls_datum_t *, gnutls_certificate_get_peers,
+           (gnutls_session_t, unsigned int *));
+DEF_DLL_FN (void, gnutls_certificate_set_verify_flags,
+           (gnutls_certificate_credentials_t, unsigned int));
+DEF_DLL_FN (int, gnutls_certificate_set_x509_crl_file,
+           (gnutls_certificate_credentials_t, const char *,
+            gnutls_x509_crt_fmt_t));
+DEF_DLL_FN (int, gnutls_certificate_set_x509_key_file,
+           (gnutls_certificate_credentials_t, const char *, const char *,
+            gnutls_x509_crt_fmt_t));
+# if ((GNUTLS_VERSION_MAJOR                                            \
+       + (GNUTLS_VERSION_MINOR > 0 || GNUTLS_VERSION_PATCH >= 20))     \
+      > 3)
+DEF_DLL_FN (int, gnutls_certificate_set_x509_system_trust,
+           (gnutls_certificate_credentials_t));
+# endif
+DEF_DLL_FN (int, gnutls_certificate_set_x509_trust_file,
+           (gnutls_certificate_credentials_t, const char *,
+            gnutls_x509_crt_fmt_t));
+DEF_DLL_FN (gnutls_certificate_type_t, gnutls_certificate_type_get,
+           (gnutls_session_t));
+DEF_DLL_FN (int, gnutls_certificate_verify_peers2,
+           (gnutls_session_t, unsigned int *));
+DEF_DLL_FN (int, gnutls_credentials_set,
+           (gnutls_session_t, gnutls_credentials_type_t, void *));
+DEF_DLL_FN (void, gnutls_deinit, (gnutls_session_t));
+DEF_DLL_FN (void, gnutls_dh_set_prime_bits,
+           (gnutls_session_t, unsigned int));
+DEF_DLL_FN (int, gnutls_dh_get_prime_bits, (gnutls_session_t));
+DEF_DLL_FN (int, gnutls_error_is_fatal, (int));
+DEF_DLL_FN (int, gnutls_global_init, (void));
+DEF_DLL_FN (void, gnutls_global_set_log_function, (gnutls_log_func));
+# ifdef HAVE_GNUTLS3
+DEF_DLL_FN (void, gnutls_global_set_audit_log_function, (gnutls_audit_log_func));
+# endif
+DEF_DLL_FN (void, gnutls_global_set_log_level, (int));
+DEF_DLL_FN (int, gnutls_handshake, (gnutls_session_t));
+DEF_DLL_FN (int, gnutls_init, (gnutls_session_t *, unsigned int));
+DEF_DLL_FN (int, gnutls_priority_set_direct,
+           (gnutls_session_t, const char *, const char **));
+DEF_DLL_FN (size_t, gnutls_record_check_pending, (gnutls_session_t));
+DEF_DLL_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t));
+DEF_DLL_FN (ssize_t, gnutls_record_send,
+           (gnutls_session_t, const void *, size_t));
+DEF_DLL_FN (const char *, gnutls_strerror, (int));
+DEF_DLL_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int));
+DEF_DLL_FN (const char *, gnutls_check_version, (const char *));
+DEF_DLL_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int));
+DEF_DLL_FN (void, gnutls_transport_set_ptr2,
+           (gnutls_session_t, gnutls_transport_ptr_t,
+            gnutls_transport_ptr_t));
+DEF_DLL_FN (void, gnutls_transport_set_pull_function,
+           (gnutls_session_t, gnutls_pull_func));
+DEF_DLL_FN (void, gnutls_transport_set_push_function,
+           (gnutls_session_t, gnutls_push_func));
+DEF_DLL_FN (int, gnutls_x509_crt_check_hostname,
+           (gnutls_x509_crt_t, const char *));
+DEF_DLL_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t));
+DEF_DLL_FN (int, gnutls_x509_crt_import,
+           (gnutls_x509_crt_t, const gnutls_datum_t *,
+            gnutls_x509_crt_fmt_t));
+DEF_DLL_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_fingerprint,
+           (gnutls_x509_crt_t,
+            gnutls_digest_algorithm_t, void *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_version,
+           (gnutls_x509_crt_t));
+DEF_DLL_FN (int, gnutls_x509_crt_get_serial,
+           (gnutls_x509_crt_t, void *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_issuer_dn,
+           (gnutls_x509_crt_t, char *, size_t *));
+DEF_DLL_FN (time_t, gnutls_x509_crt_get_activation_time,
+           (gnutls_x509_crt_t));
+DEF_DLL_FN (time_t, gnutls_x509_crt_get_expiration_time,
+           (gnutls_x509_crt_t));
+DEF_DLL_FN (int, gnutls_x509_crt_get_dn,
+           (gnutls_x509_crt_t, char *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_pk_algorithm,
+           (gnutls_x509_crt_t, unsigned int *));
+DEF_DLL_FN (const char*, gnutls_pk_algorithm_get_name,
+           (gnutls_pk_algorithm_t));
+DEF_DLL_FN (int, gnutls_pk_bits_to_sec_param,
+           (gnutls_pk_algorithm_t, unsigned int));
+DEF_DLL_FN (int, gnutls_x509_crt_get_issuer_unique_id,
+           (gnutls_x509_crt_t, char *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_subject_unique_id,
+           (gnutls_x509_crt_t, char *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_signature_algorithm,
+           (gnutls_x509_crt_t));
+DEF_DLL_FN (int, gnutls_x509_crt_get_signature,
+           (gnutls_x509_crt_t, char *, size_t *));
+DEF_DLL_FN (int, gnutls_x509_crt_get_key_id,
+           (gnutls_x509_crt_t, unsigned int, unsigned char *, size_t *_size));
+DEF_DLL_FN (const char*, gnutls_sec_param_get_name, (gnutls_sec_param_t));
+DEF_DLL_FN (const char*, gnutls_sign_get_name, (gnutls_sign_algorithm_t));
+DEF_DLL_FN (int, gnutls_server_name_set,
+           (gnutls_session_t, gnutls_server_name_type_t,
+            const void *, size_t));
+DEF_DLL_FN (gnutls_kx_algorithm_t, gnutls_kx_get, (gnutls_session_t));
+DEF_DLL_FN (const char*, gnutls_kx_get_name, (gnutls_kx_algorithm_t));
+DEF_DLL_FN (gnutls_protocol_t, gnutls_protocol_get_version,
+           (gnutls_session_t));
+DEF_DLL_FN (const char*, gnutls_protocol_get_name, (gnutls_protocol_t));
+DEF_DLL_FN (gnutls_cipher_algorithm_t, gnutls_cipher_get,
+           (gnutls_session_t));
+DEF_DLL_FN (const char*, gnutls_cipher_get_name,
+           (gnutls_cipher_algorithm_t));
+DEF_DLL_FN (gnutls_mac_algorithm_t, gnutls_mac_get, (gnutls_session_t));
+DEF_DLL_FN (const char*, gnutls_mac_get_name, (gnutls_mac_algorithm_t));
 
-/* Macro for loading GnuTLS functions from the library.  */
-#define LOAD_GNUTLS_FN(lib,func) {                                     \
-    fn_##func = (void *) GetProcAddress (lib, #func);                  \
-    if (!fn_##func) return 0;                                          \
-  }
-
-DEF_GNUTLS_FN (gnutls_alert_description_t, gnutls_alert_get,
-              (gnutls_session_t));
-DEF_GNUTLS_FN (const char *, gnutls_alert_get_name,
-              (gnutls_alert_description_t));
-DEF_GNUTLS_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int));
-DEF_GNUTLS_FN (int, gnutls_anon_allocate_client_credentials,
-              (gnutls_anon_client_credentials_t *));
-DEF_GNUTLS_FN (void, gnutls_anon_free_client_credentials,
-              (gnutls_anon_client_credentials_t));
-DEF_GNUTLS_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t));
-DEF_GNUTLS_FN (int, gnutls_certificate_allocate_credentials,
-              (gnutls_certificate_credentials_t *));
-DEF_GNUTLS_FN (void, gnutls_certificate_free_credentials,
-              (gnutls_certificate_credentials_t));
-DEF_GNUTLS_FN (const gnutls_datum_t *, gnutls_certificate_get_peers,
-              (gnutls_session_t, unsigned int *));
-DEF_GNUTLS_FN (void, gnutls_certificate_set_verify_flags,
-              (gnutls_certificate_credentials_t, unsigned int));
-DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_crl_file,
-              (gnutls_certificate_credentials_t, const char *,
-               gnutls_x509_crt_fmt_t));
-DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_key_file,
-              (gnutls_certificate_credentials_t, const char *, const char *,
-               gnutls_x509_crt_fmt_t));
-DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_trust_file,
-              (gnutls_certificate_credentials_t, const char *,
-               gnutls_x509_crt_fmt_t));
-DEF_GNUTLS_FN (gnutls_certificate_type_t, gnutls_certificate_type_get,
-              (gnutls_session_t));
-DEF_GNUTLS_FN (int, gnutls_certificate_verify_peers2,
-              (gnutls_session_t, unsigned int *));
-DEF_GNUTLS_FN (int, gnutls_credentials_set,
-              (gnutls_session_t, gnutls_credentials_type_t, void *));
-DEF_GNUTLS_FN (void, gnutls_deinit, (gnutls_session_t));
-DEF_GNUTLS_FN (void, gnutls_dh_set_prime_bits,
-              (gnutls_session_t, unsigned int));
-DEF_GNUTLS_FN (int, gnutls_error_is_fatal, (int));
-DEF_GNUTLS_FN (int, gnutls_global_init, (void));
-DEF_GNUTLS_FN (void, gnutls_global_set_log_function, (gnutls_log_func));
-#ifdef HAVE_GNUTLS3
-DEF_GNUTLS_FN (void, gnutls_global_set_audit_log_function, (gnutls_audit_log_func));
-#endif
-DEF_GNUTLS_FN (void, gnutls_global_set_log_level, (int));
-DEF_GNUTLS_FN (void, gnutls_global_set_mem_functions,
-              (gnutls_alloc_function, gnutls_alloc_function,
-               gnutls_is_secure_function, gnutls_realloc_function,
-               gnutls_free_function));
-DEF_GNUTLS_FN (int, gnutls_handshake, (gnutls_session_t));
-DEF_GNUTLS_FN (int, gnutls_init, (gnutls_session_t *, gnutls_connection_end_t));
-DEF_GNUTLS_FN (int, gnutls_priority_set_direct,
-              (gnutls_session_t, const char *, const char **));
-DEF_GNUTLS_FN (size_t, gnutls_record_check_pending, (gnutls_session_t));
-DEF_GNUTLS_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t));
-DEF_GNUTLS_FN (ssize_t, gnutls_record_send,
-              (gnutls_session_t, const void *, size_t));
-DEF_GNUTLS_FN (const char *, gnutls_strerror, (int));
-DEF_GNUTLS_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int));
-DEF_GNUTLS_FN (const char *, gnutls_check_version, (const char *));
-DEF_GNUTLS_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int));
-DEF_GNUTLS_FN (void, gnutls_transport_set_ptr2,
-              (gnutls_session_t, gnutls_transport_ptr_t,
-               gnutls_transport_ptr_t));
-DEF_GNUTLS_FN (void, gnutls_transport_set_pull_function,
-              (gnutls_session_t, gnutls_pull_func));
-DEF_GNUTLS_FN (void, gnutls_transport_set_push_function,
-              (gnutls_session_t, gnutls_push_func));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_check_hostname,
-              (gnutls_x509_crt_t, const char *));
-DEF_GNUTLS_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_import,
-              (gnutls_x509_crt_t, const gnutls_datum_t *,
-               gnutls_x509_crt_fmt_t));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_fingerprint,
-              (gnutls_x509_crt_t,
-               gnutls_digest_algorithm_t, void *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_version,
-              (gnutls_x509_crt_t));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_serial,
-              (gnutls_x509_crt_t, void *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_issuer_dn,
-              (gnutls_x509_crt_t, char *, size_t *));
-DEF_GNUTLS_FN (time_t, gnutls_x509_crt_get_activation_time,
-              (gnutls_x509_crt_t));
-DEF_GNUTLS_FN (time_t, gnutls_x509_crt_get_expiration_time,
-              (gnutls_x509_crt_t));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_dn,
-              (gnutls_x509_crt_t, char *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_pk_algorithm,
-              (gnutls_x509_crt_t, unsigned int *));
-DEF_GNUTLS_FN (const char*, gnutls_pk_algorithm_get_name,
-              (gnutls_pk_algorithm_t));
-DEF_GNUTLS_FN (int, gnutls_pk_bits_to_sec_param,
-              (gnutls_pk_algorithm_t, unsigned int));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_issuer_unique_id,
-              (gnutls_x509_crt_t, char *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_subject_unique_id,
-              (gnutls_x509_crt_t, char *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_signature_algorithm,
-              (gnutls_x509_crt_t));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_signature,
-              (gnutls_x509_crt_t, char *, size_t *));
-DEF_GNUTLS_FN (int, gnutls_x509_crt_get_key_id,
-              (gnutls_x509_crt_t, unsigned int,
-               unsigned char *, size_t *_size));
-DEF_GNUTLS_FN (const char*, gnutls_sec_param_get_name, (gnutls_sec_param_t));
-DEF_GNUTLS_FN (const char*, gnutls_sign_get_name,
-              (gnutls_sign_algorithm_t));
-DEF_GNUTLS_FN (int, gnutls_server_name_set, (gnutls_session_t,
-                                            gnutls_server_name_type_t,
-                                            const void *, size_t));
 
 static bool
 init_gnutls_functions (void)
@@ -203,70 +208,83 @@ init_gnutls_functions (void)
       return 0;
     }
 
-  LOAD_GNUTLS_FN (library, gnutls_alert_get);
-  LOAD_GNUTLS_FN (library, gnutls_alert_get_name);
-  LOAD_GNUTLS_FN (library, gnutls_alert_send_appropriate);
-  LOAD_GNUTLS_FN (library, gnutls_anon_allocate_client_credentials);
-  LOAD_GNUTLS_FN (library, gnutls_anon_free_client_credentials);
-  LOAD_GNUTLS_FN (library, gnutls_bye);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_allocate_credentials);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_free_credentials);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_get_peers);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_set_verify_flags);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_crl_file);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_key_file);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_trust_file);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_type_get);
-  LOAD_GNUTLS_FN (library, gnutls_certificate_verify_peers2);
-  LOAD_GNUTLS_FN (library, gnutls_credentials_set);
-  LOAD_GNUTLS_FN (library, gnutls_deinit);
-  LOAD_GNUTLS_FN (library, gnutls_dh_set_prime_bits);
-  LOAD_GNUTLS_FN (library, gnutls_error_is_fatal);
-  LOAD_GNUTLS_FN (library, gnutls_global_init);
-  LOAD_GNUTLS_FN (library, gnutls_global_set_log_function);
-#ifdef HAVE_GNUTLS3
-  LOAD_GNUTLS_FN (library, gnutls_global_set_audit_log_function);
-#endif
-  LOAD_GNUTLS_FN (library, gnutls_global_set_log_level);
-  LOAD_GNUTLS_FN (library, gnutls_global_set_mem_functions);
-  LOAD_GNUTLS_FN (library, gnutls_handshake);
-  LOAD_GNUTLS_FN (library, gnutls_init);
-  LOAD_GNUTLS_FN (library, gnutls_priority_set_direct);
-  LOAD_GNUTLS_FN (library, gnutls_record_check_pending);
-  LOAD_GNUTLS_FN (library, gnutls_record_recv);
-  LOAD_GNUTLS_FN (library, gnutls_record_send);
-  LOAD_GNUTLS_FN (library, gnutls_strerror);
-  LOAD_GNUTLS_FN (library, gnutls_transport_set_errno);
-  LOAD_GNUTLS_FN (library, gnutls_check_version);
+  LOAD_DLL_FN (library, gnutls_alert_get);
+  LOAD_DLL_FN (library, gnutls_alert_get_name);
+  LOAD_DLL_FN (library, gnutls_alert_send_appropriate);
+  LOAD_DLL_FN (library, gnutls_anon_allocate_client_credentials);
+  LOAD_DLL_FN (library, gnutls_anon_free_client_credentials);
+  LOAD_DLL_FN (library, gnutls_bye);
+  LOAD_DLL_FN (library, gnutls_certificate_allocate_credentials);
+  LOAD_DLL_FN (library, gnutls_certificate_free_credentials);
+  LOAD_DLL_FN (library, gnutls_certificate_get_peers);
+  LOAD_DLL_FN (library, gnutls_certificate_set_verify_flags);
+  LOAD_DLL_FN (library, gnutls_certificate_set_x509_crl_file);
+  LOAD_DLL_FN (library, gnutls_certificate_set_x509_key_file);
+# if ((GNUTLS_VERSION_MAJOR                                            \
+       + (GNUTLS_VERSION_MINOR > 0 || GNUTLS_VERSION_PATCH >= 20))     \
+      > 3)
+  LOAD_DLL_FN (library, gnutls_certificate_set_x509_system_trust);
+# endif
+  LOAD_DLL_FN (library, gnutls_certificate_set_x509_trust_file);
+  LOAD_DLL_FN (library, gnutls_certificate_type_get);
+  LOAD_DLL_FN (library, gnutls_certificate_verify_peers2);
+  LOAD_DLL_FN (library, gnutls_credentials_set);
+  LOAD_DLL_FN (library, gnutls_deinit);
+  LOAD_DLL_FN (library, gnutls_dh_set_prime_bits);
+  LOAD_DLL_FN (library, gnutls_dh_get_prime_bits);
+  LOAD_DLL_FN (library, gnutls_error_is_fatal);
+  LOAD_DLL_FN (library, gnutls_global_init);
+  LOAD_DLL_FN (library, gnutls_global_set_log_function);
+# ifdef HAVE_GNUTLS3
+  LOAD_DLL_FN (library, gnutls_global_set_audit_log_function);
+# endif
+  LOAD_DLL_FN (library, gnutls_global_set_log_level);
+  LOAD_DLL_FN (library, gnutls_handshake);
+  LOAD_DLL_FN (library, gnutls_init);
+  LOAD_DLL_FN (library, gnutls_priority_set_direct);
+  LOAD_DLL_FN (library, gnutls_record_check_pending);
+  LOAD_DLL_FN (library, gnutls_record_recv);
+  LOAD_DLL_FN (library, gnutls_record_send);
+  LOAD_DLL_FN (library, gnutls_strerror);
+  LOAD_DLL_FN (library, gnutls_transport_set_errno);
+  LOAD_DLL_FN (library, gnutls_check_version);
   /* We don't need to call gnutls_transport_set_lowat in GnuTLS 2.11.1
      and later, and the function was removed entirely in 3.0.0.  */
   if (!fn_gnutls_check_version ("2.11.1"))
-    LOAD_GNUTLS_FN (library, gnutls_transport_set_lowat);
-  LOAD_GNUTLS_FN (library, gnutls_transport_set_ptr2);
-  LOAD_GNUTLS_FN (library, gnutls_transport_set_pull_function);
-  LOAD_GNUTLS_FN (library, gnutls_transport_set_push_function);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_check_hostname);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_deinit);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_import);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_init);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_fingerprint);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_version);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_serial);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_issuer_dn);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_activation_time);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_expiration_time);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_dn);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_pk_algorithm);
-  LOAD_GNUTLS_FN (library, gnutls_pk_algorithm_get_name);
-  LOAD_GNUTLS_FN (library, gnutls_pk_bits_to_sec_param);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_issuer_unique_id);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_subject_unique_id);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_signature_algorithm);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_signature);
-  LOAD_GNUTLS_FN (library, gnutls_x509_crt_get_key_id);
-  LOAD_GNUTLS_FN (library, gnutls_sec_param_get_name);
-  LOAD_GNUTLS_FN (library, gnutls_sign_get_name);
-  LOAD_GNUTLS_FN (library, gnutls_server_name_set);
+    LOAD_DLL_FN (library, gnutls_transport_set_lowat);
+  LOAD_DLL_FN (library, gnutls_transport_set_ptr2);
+  LOAD_DLL_FN (library, gnutls_transport_set_pull_function);
+  LOAD_DLL_FN (library, gnutls_transport_set_push_function);
+  LOAD_DLL_FN (library, gnutls_x509_crt_check_hostname);
+  LOAD_DLL_FN (library, gnutls_x509_crt_deinit);
+  LOAD_DLL_FN (library, gnutls_x509_crt_import);
+  LOAD_DLL_FN (library, gnutls_x509_crt_init);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_fingerprint);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_version);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_serial);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_issuer_dn);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_activation_time);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_expiration_time);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_dn);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_pk_algorithm);
+  LOAD_DLL_FN (library, gnutls_pk_algorithm_get_name);
+  LOAD_DLL_FN (library, gnutls_pk_bits_to_sec_param);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_issuer_unique_id);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_subject_unique_id);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_signature_algorithm);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_signature);
+  LOAD_DLL_FN (library, gnutls_x509_crt_get_key_id);
+  LOAD_DLL_FN (library, gnutls_sec_param_get_name);
+  LOAD_DLL_FN (library, gnutls_sign_get_name);
+  LOAD_DLL_FN (library, gnutls_server_name_set);
+  LOAD_DLL_FN (library, gnutls_kx_get);
+  LOAD_DLL_FN (library, gnutls_kx_get_name);
+  LOAD_DLL_FN (library, gnutls_protocol_get_version);
+  LOAD_DLL_FN (library, gnutls_protocol_get_name);
+  LOAD_DLL_FN (library, gnutls_cipher_get);
+  LOAD_DLL_FN (library, gnutls_cipher_get_name);
+  LOAD_DLL_FN (library, gnutls_mac_get);
+  LOAD_DLL_FN (library, gnutls_mac_get_name);
 
   max_log_level = global_gnutls_log_level;
 
@@ -279,73 +297,91 @@ init_gnutls_functions (void)
   return 1;
 }
 
-#else /* !WINDOWSNT */
-
-#define fn_gnutls_alert_get                    gnutls_alert_get
-#define fn_gnutls_alert_get_name               gnutls_alert_get_name
-#define fn_gnutls_alert_send_appropriate       gnutls_alert_send_appropriate
-#define fn_gnutls_anon_allocate_client_credentials gnutls_anon_allocate_client_credentials
-#define fn_gnutls_anon_free_client_credentials gnutls_anon_free_client_credentials
-#define fn_gnutls_bye                          gnutls_bye
-#define fn_gnutls_certificate_allocate_credentials gnutls_certificate_allocate_credentials
-#define fn_gnutls_certificate_free_credentials gnutls_certificate_free_credentials
-#define fn_gnutls_certificate_get_peers                gnutls_certificate_get_peers
-#define fn_gnutls_certificate_set_verify_flags gnutls_certificate_set_verify_flags
-#define fn_gnutls_certificate_set_x509_crl_file        gnutls_certificate_set_x509_crl_file
-#define fn_gnutls_certificate_set_x509_key_file gnutls_certificate_set_x509_key_file
-#define fn_gnutls_certificate_set_x509_trust_file gnutls_certificate_set_x509_trust_file
-#define fn_gnutls_certificate_type_get         gnutls_certificate_type_get
-#define fn_gnutls_certificate_verify_peers2    gnutls_certificate_verify_peers2
-#define fn_gnutls_credentials_set              gnutls_credentials_set
-#define fn_gnutls_deinit                       gnutls_deinit
-#define fn_gnutls_dh_set_prime_bits            gnutls_dh_set_prime_bits
-#define fn_gnutls_error_is_fatal               gnutls_error_is_fatal
-#define fn_gnutls_global_init                  gnutls_global_init
-#define fn_gnutls_global_set_log_function      gnutls_global_set_log_function
-#ifdef HAVE_GNUTLS3
-#define fn_gnutls_global_set_audit_log_function        gnutls_global_set_audit_log_function
-#endif
-#define fn_gnutls_global_set_log_level         gnutls_global_set_log_level
-#define fn_gnutls_global_set_mem_functions     gnutls_global_set_mem_functions
-#define fn_gnutls_handshake                    gnutls_handshake
-#define fn_gnutls_init                         gnutls_init
-#define fn_gnutls_priority_set_direct          gnutls_priority_set_direct
-#define fn_gnutls_record_check_pending         gnutls_record_check_pending
-#define fn_gnutls_record_recv                  gnutls_record_recv
-#define fn_gnutls_record_send                  gnutls_record_send
-#define fn_gnutls_strerror                     gnutls_strerror
-#ifdef WINDOWSNT
-#define fn_gnutls_transport_set_errno          gnutls_transport_set_errno
+# define gnutls_alert_get fn_gnutls_alert_get
+# define gnutls_alert_get_name fn_gnutls_alert_get_name
+# define gnutls_alert_send_appropriate fn_gnutls_alert_send_appropriate
+# define gnutls_anon_allocate_client_credentials fn_gnutls_anon_allocate_client_credentials
+# define gnutls_anon_free_client_credentials fn_gnutls_anon_free_client_credentials
+# define gnutls_bye fn_gnutls_bye
+# define gnutls_certificate_allocate_credentials fn_gnutls_certificate_allocate_credentials
+# define gnutls_certificate_free_credentials fn_gnutls_certificate_free_credentials
+# define gnutls_certificate_get_peers fn_gnutls_certificate_get_peers
+# define gnutls_certificate_set_verify_flags fn_gnutls_certificate_set_verify_flags
+# define gnutls_certificate_set_x509_crl_file fn_gnutls_certificate_set_x509_crl_file
+# define gnutls_certificate_set_x509_key_file fn_gnutls_certificate_set_x509_key_file
+# define gnutls_certificate_set_x509_system_trust fn_gnutls_certificate_set_x509_system_trust
+# define gnutls_certificate_set_x509_trust_file fn_gnutls_certificate_set_x509_trust_file
+# define gnutls_certificate_type_get fn_gnutls_certificate_type_get
+# define gnutls_certificate_verify_peers2 fn_gnutls_certificate_verify_peers2
+# define gnutls_check_version fn_gnutls_check_version
+# define gnutls_cipher_get fn_gnutls_cipher_get
+# define gnutls_cipher_get_name fn_gnutls_cipher_get_name
+# define gnutls_credentials_set fn_gnutls_credentials_set
+# define gnutls_deinit fn_gnutls_deinit
+# define gnutls_dh_get_prime_bits fn_gnutls_dh_get_prime_bits
+# define gnutls_dh_set_prime_bits fn_gnutls_dh_set_prime_bits
+# define gnutls_error_is_fatal fn_gnutls_error_is_fatal
+# define gnutls_global_init fn_gnutls_global_init
+# define gnutls_global_set_audit_log_function fn_gnutls_global_set_audit_log_function
+# define gnutls_global_set_log_function fn_gnutls_global_set_log_function
+# define gnutls_global_set_log_level fn_gnutls_global_set_log_level
+# define gnutls_handshake fn_gnutls_handshake
+# define gnutls_init fn_gnutls_init
+# define gnutls_kx_get fn_gnutls_kx_get
+# define gnutls_kx_get_name fn_gnutls_kx_get_name
+# define gnutls_mac_get fn_gnutls_mac_get
+# define gnutls_mac_get_name fn_gnutls_mac_get_name
+# define gnutls_pk_algorithm_get_name fn_gnutls_pk_algorithm_get_name
+# define gnutls_pk_bits_to_sec_param fn_gnutls_pk_bits_to_sec_param
+# define gnutls_priority_set_direct fn_gnutls_priority_set_direct
+# define gnutls_protocol_get_name fn_gnutls_protocol_get_name
+# define gnutls_protocol_get_version fn_gnutls_protocol_get_version
+# define gnutls_record_check_pending fn_gnutls_record_check_pending
+# define gnutls_record_recv fn_gnutls_record_recv
+# define gnutls_record_send fn_gnutls_record_send
+# define gnutls_sec_param_get_name fn_gnutls_sec_param_get_name
+# define gnutls_server_name_set fn_gnutls_server_name_set
+# define gnutls_sign_get_name fn_gnutls_sign_get_name
+# define gnutls_strerror fn_gnutls_strerror
+# define gnutls_transport_set_errno fn_gnutls_transport_set_errno
+# define gnutls_transport_set_lowat fn_gnutls_transport_set_lowat
+# define gnutls_transport_set_ptr2 fn_gnutls_transport_set_ptr2
+# define gnutls_transport_set_pull_function fn_gnutls_transport_set_pull_function
+# define gnutls_transport_set_push_function fn_gnutls_transport_set_push_function
+# define gnutls_x509_crt_check_hostname fn_gnutls_x509_crt_check_hostname
+# define gnutls_x509_crt_deinit fn_gnutls_x509_crt_deinit
+# define gnutls_x509_crt_get_activation_time fn_gnutls_x509_crt_get_activation_time
+# define gnutls_x509_crt_get_dn fn_gnutls_x509_crt_get_dn
+# define gnutls_x509_crt_get_expiration_time fn_gnutls_x509_crt_get_expiration_time
+# define gnutls_x509_crt_get_fingerprint fn_gnutls_x509_crt_get_fingerprint
+# define gnutls_x509_crt_get_issuer_dn fn_gnutls_x509_crt_get_issuer_dn
+# define gnutls_x509_crt_get_issuer_unique_id fn_gnutls_x509_crt_get_issuer_unique_id
+# define gnutls_x509_crt_get_key_id fn_gnutls_x509_crt_get_key_id
+# define gnutls_x509_crt_get_pk_algorithm fn_gnutls_x509_crt_get_pk_algorithm
+# define gnutls_x509_crt_get_serial fn_gnutls_x509_crt_get_serial
+# define gnutls_x509_crt_get_signature fn_gnutls_x509_crt_get_signature
+# define gnutls_x509_crt_get_signature_algorithm fn_gnutls_x509_crt_get_signature_algorithm
+# define gnutls_x509_crt_get_subject_unique_id fn_gnutls_x509_crt_get_subject_unique_id
+# define gnutls_x509_crt_get_version fn_gnutls_x509_crt_get_version
+# define gnutls_x509_crt_import fn_gnutls_x509_crt_import
+# define gnutls_x509_crt_init fn_gnutls_x509_crt_init
+
 #endif
-#define fn_gnutls_transport_set_ptr2           gnutls_transport_set_ptr2
-#define fn_gnutls_x509_crt_check_hostname      gnutls_x509_crt_check_hostname
-#define fn_gnutls_x509_crt_deinit              gnutls_x509_crt_deinit
-#define fn_gnutls_x509_crt_import              gnutls_x509_crt_import
-#define fn_gnutls_x509_crt_init                        gnutls_x509_crt_init
-#define fn_gnutls_x509_crt_get_fingerprint     gnutls_x509_crt_get_fingerprint
-#define fn_gnutls_x509_crt_get_version          gnutls_x509_crt_get_version
-#define fn_gnutls_x509_crt_get_serial           gnutls_x509_crt_get_serial
-#define fn_gnutls_x509_crt_get_issuer_dn        gnutls_x509_crt_get_issuer_dn
-#define fn_gnutls_x509_crt_get_activation_time  gnutls_x509_crt_get_activation_time
-#define fn_gnutls_x509_crt_get_expiration_time  gnutls_x509_crt_get_expiration_time
-#define fn_gnutls_x509_crt_get_dn               gnutls_x509_crt_get_dn
-#define fn_gnutls_x509_crt_get_pk_algorithm     gnutls_x509_crt_get_pk_algorithm
-#define fn_gnutls_pk_algorithm_get_name         gnutls_pk_algorithm_get_name
-#define fn_gnutls_pk_bits_to_sec_param          gnutls_pk_bits_to_sec_param
-#define fn_gnutls_x509_crt_get_issuer_unique_id gnutls_x509_crt_get_issuer_unique_id
-#define fn_gnutls_x509_crt_get_subject_unique_id gnutls_x509_crt_get_subject_unique_id
-#define fn_gnutls_x509_crt_get_signature_algorithm gnutls_x509_crt_get_signature_algorithm
-#define fn_gnutls_x509_crt_get_signature        gnutls_x509_crt_get_signature
-#define fn_gnutls_x509_crt_get_key_id           gnutls_x509_crt_get_key_id
-#define fn_gnutls_sec_param_get_name            gnutls_sec_param_get_name
-#define fn_gnutls_sign_get_name                 gnutls_sign_get_name
-#define fn_gnutls_server_name_set              gnutls_server_name_set
-
-#endif /* !WINDOWSNT */
 
 \f
+/* Report memory exhaustion if ERR is an out-of-memory indication.  */
+static void
+check_memory_full (int err)
+{
+  /* When GnuTLS exhausts memory, it doesn't say how much memory it
+     asked for, so tell the Emacs allocator that GnuTLS asked for no
+     bytes.  This isn't accurate, but it's good enough.  */
+  if (err == GNUTLS_E_MEMORY_ERROR)
+    memory_full (0);
+}
+
 #ifdef HAVE_GNUTLS3
-/* Function to log a simple audit message.  */
+/* Log a simple audit message.  */
 static void
 gnutls_audit_log_function (gnutls_session_t session, const char *string)
 {
@@ -356,21 +392,21 @@ gnutls_audit_log_function (gnutls_session_t session, const char *string)
 }
 #endif
 
-/* Function to log a simple message.  */
+/* Log a simple message.  */
 static void
 gnutls_log_function (int level, const char *string)
 {
   message ("gnutls.c: [%d] %s", level, string);
 }
 
-/* Function to log a message and a string.  */
+/* Log a message and a string.  */
 static void
 gnutls_log_function2 (int level, const char *string, const char *extra)
 {
   message ("gnutls.c: [%d] %s %s", level, string, extra);
 }
 
-/* Function to log a message and an integer.  */
+/* Log a message and an integer.  */
 static void
 gnutls_log_function2i (int level, const char *string, int extra)
 {
@@ -392,11 +428,11 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
       /* On W32 we cannot transfer socket handles between different runtime
         libraries, so we tell GnuTLS to use our special push/pull
         functions.  */
-      fn_gnutls_transport_set_ptr2 (state,
-                                   (gnutls_transport_ptr_t) proc,
-                                   (gnutls_transport_ptr_t) proc);
-      fn_gnutls_transport_set_push_function (state, &emacs_gnutls_push);
-      fn_gnutls_transport_set_pull_function (state, &emacs_gnutls_pull);
+      gnutls_transport_set_ptr2 (state,
+                                (gnutls_transport_ptr_t) proc,
+                                (gnutls_transport_ptr_t) proc);
+      gnutls_transport_set_push_function (state, &emacs_gnutls_push);
+      gnutls_transport_set_pull_function (state, &emacs_gnutls_pull);
 
       /* For non blocking sockets or other custom made pull/push
         functions the gnutls_transport_set_lowat must be called, with
@@ -409,15 +445,15 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
         zero by default in version 2.11.1, and the function
         gnutls_transport_set_lowat was removed from the library in
         version 2.99.0.  */
-      if (!fn_gnutls_check_version ("2.11.1"))
-       fn_gnutls_transport_set_lowat (state, 0);
+      if (!gnutls_check_version ("2.11.1"))
+       gnutls_transport_set_lowat (state, 0);
 #else
       /* This is how GnuTLS takes sockets: as file descriptors passed
         in.  For an Emacs process socket, infd and outfd are the
         same but we use this two-argument version for clarity.  */
-      fn_gnutls_transport_set_ptr2 (state,
-                                   (void *) (intptr_t) proc->infd,
-                                   (void *) (intptr_t) proc->outfd);
+      gnutls_transport_set_ptr2 (state,
+                                (void *) (intptr_t) proc->infd,
+                                (void *) (intptr_t) proc->outfd);
 #endif
 
       proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET;
@@ -425,11 +461,11 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
 
   do
     {
-      ret = fn_gnutls_handshake (state);
+      ret = gnutls_handshake (state);
       emacs_gnutls_handle_error (state, ret);
       QUIT;
     }
-  while (ret < 0 && fn_gnutls_error_is_fatal (ret) == 0);
+  while (ret < 0 && gnutls_error_is_fatal (ret) == 0);
 
   proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED;
 
@@ -440,7 +476,7 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
     }
   else
     {
-      fn_gnutls_alert_send_appropriate (state, ret);
+      check_memory_full (gnutls_alert_send_appropriate (state, ret));
     }
   return ret;
 }
@@ -448,14 +484,14 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
 ptrdiff_t
 emacs_gnutls_record_check_pending (gnutls_session_t state)
 {
-  return fn_gnutls_record_check_pending (state);
+  return gnutls_record_check_pending (state);
 }
 
 #ifdef WINDOWSNT
 void
 emacs_gnutls_transport_set_errno (gnutls_session_t state, int err)
 {
-  fn_gnutls_transport_set_errno (state, err);
+  gnutls_transport_set_errno (state, err);
 }
 #endif
 
@@ -476,7 +512,7 @@ emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte)
 
   while (nbyte > 0)
     {
-      rtnval = fn_gnutls_record_send (state, buf, nbyte);
+      rtnval = gnutls_record_send (state, buf, nbyte);
 
       if (rtnval < 0)
        {
@@ -528,7 +564,7 @@ emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte)
       proc->gnutls_handshakes_tried = 0;
       return 0;
     }
-  rtnval = fn_gnutls_record_recv (state, buf, nbyte);
+  rtnval = gnutls_record_recv (state, buf, nbyte);
   if (rtnval >= 0)
     return rtnval;
   else if (rtnval == GNUTLS_E_UNEXPECTED_PACKET_LENGTH)
@@ -557,18 +593,20 @@ emacs_gnutls_handle_error (gnutls_session_t session, int err)
   if (err >= 0)
     return 1;
 
+  check_memory_full (err);
+
   max_log_level = global_gnutls_log_level;
 
   /* TODO: use gnutls-error-fatalp and gnutls-error-string.  */
 
-  str = fn_gnutls_strerror (err);
+  str = gnutls_strerror (err);
   if (!str)
     str = "unknown";
 
-  if (fn_gnutls_error_is_fatal (err))
+  if (gnutls_error_is_fatal (err))
     {
       ret = 0;
-      GNUTLS_LOG2 (0, max_log_level, "fatal error:", str);
+      GNUTLS_LOG2 (1, max_log_level, "fatal error:", str);
     }
   else
     {
@@ -592,9 +630,9 @@ emacs_gnutls_handle_error (gnutls_session_t session, int err)
   if (err == GNUTLS_E_WARNING_ALERT_RECEIVED
       || err == GNUTLS_E_FATAL_ALERT_RECEIVED)
     {
-      int alert = fn_gnutls_alert_get (session);
+      int alert = gnutls_alert_get (session);
       int level = (err == GNUTLS_E_FATAL_ALERT_RECEIVED) ? 0 : 1;
-      str = fn_gnutls_alert_get_name (alert);
+      str = gnutls_alert_get_name (alert);
       if (!str)
        str = "unknown";
 
@@ -622,6 +660,7 @@ gnutls_make_error (int err)
       return Qgnutls_e_invalid_session;
     }
 
+  check_memory_full (err);
   return make_number (err);
 }
 
@@ -640,20 +679,20 @@ emacs_gnutls_deinit (Lisp_Object proc)
   if (XPROCESS (proc)->gnutls_x509_cred)
     {
       GNUTLS_LOG (2, log_level, "Deallocating x509 credentials");
-      fn_gnutls_certificate_free_credentials (XPROCESS (proc)->gnutls_x509_cred);
+      gnutls_certificate_free_credentials (XPROCESS (proc)->gnutls_x509_cred);
       XPROCESS (proc)->gnutls_x509_cred = NULL;
     }
 
   if (XPROCESS (proc)->gnutls_anon_cred)
     {
       GNUTLS_LOG (2, log_level, "Deallocating anon credentials");
-      fn_gnutls_anon_free_client_credentials (XPROCESS (proc)->gnutls_anon_cred);
+      gnutls_anon_free_client_credentials (XPROCESS (proc)->gnutls_anon_cred);
       XPROCESS (proc)->gnutls_anon_cred = NULL;
     }
 
   if (XPROCESS (proc)->gnutls_state)
     {
-      fn_gnutls_deinit (XPROCESS (proc)->gnutls_state);
+      gnutls_deinit (XPROCESS (proc)->gnutls_state);
       XPROCESS (proc)->gnutls_state = NULL;
       if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT)
        GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1;
@@ -685,9 +724,9 @@ usage: (gnutls-errorp ERROR)  */)
 }
 
 DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0,
-       doc: /* Check if ERROR is fatal.
+       doc: /* Return non-nil if ERROR is fatal.
 ERROR is an integer or a symbol with an integer `gnutls-code' property.
-usage: (gnutls-error-fatalp ERROR)  */)
+Usage: (gnutls-error-fatalp ERROR)  */)
   (Lisp_Object err)
 {
   Lisp_Object code;
@@ -710,7 +749,7 @@ usage: (gnutls-error-fatalp ERROR)  */)
   if (! TYPE_RANGED_INTEGERP (int, err))
     error ("Not an error symbol or code");
 
-  if (0 == fn_gnutls_error_is_fatal (XINT (err)))
+  if (0 == gnutls_error_is_fatal (XINT (err)))
     return Qnil;
 
   return Qt;
@@ -742,7 +781,7 @@ usage: (gnutls-error-string ERROR)  */)
   if (! TYPE_RANGED_INTEGERP (int, err))
     return build_string ("Not an error symbol or code");
 
-  return build_string (fn_gnutls_strerror (XINT (err)));
+  return build_string (gnutls_strerror (XINT (err)));
 }
 
 DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0,
@@ -753,42 +792,22 @@ See also `gnutls-init'.  */)
   return emacs_gnutls_deinit (proc);
 }
 
-DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0,
-       doc: /* Return t if GnuTLS is available in this instance of Emacs.  */)
-     (void)
-{
-#ifdef WINDOWSNT
-  Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache);
-  if (CONSP (found))
-    return XCDR (found);
-  else
-    {
-      Lisp_Object status;
-      status = init_gnutls_functions () ? Qt : Qnil;
-      Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache);
-      return status;
-    }
-#else
-  return Qt;
-#endif
-}
-
 static Lisp_Object
-gnutls_hex_string (char *buf, size_t buf_size, const char *prefix)
+gnutls_hex_string (unsigned char *buf, ptrdiff_t buf_size, const char *prefix)
 {
-  size_t prefix_length = strlen (prefix);
-  char *string = malloc (buf_size * 3 + prefix_length);
-  Lisp_Object ret;
-
+  ptrdiff_t prefix_length = strlen (prefix);
+  if ((STRING_BYTES_BOUND - prefix_length) / 3 < buf_size)
+    string_overflow ();
+  Lisp_Object ret = make_uninit_string (prefix_length + 3 * buf_size
+                                       - (buf_size != 0));
+  char *string = SSDATA (ret);
   strcpy (string, prefix);
 
-  for (int i = 0; i < buf_size; i++)
+  for (ptrdiff_t i = 0; i < buf_size; i++)
     sprintf (string + i * 3 + prefix_length,
             i == buf_size - 1 ? "%02x" : "%02x:",
-            ((unsigned char*) buf)[i]);
+            buf[i]);
 
-  ret = build_string (string);
-  free (string);
   return ret;
 }
 
@@ -797,80 +816,77 @@ gnutls_certificate_details (gnutls_x509_crt_t cert)
 {
   Lisp_Object res = Qnil;
   int err;
+  size_t buf_size;
 
   /* Version. */
   {
-    int version = fn_gnutls_x509_crt_get_version (cert);
+    int version = gnutls_x509_crt_get_version (cert);
+    check_memory_full (version);
     if (version >= GNUTLS_E_SUCCESS)
       res = nconc2 (res, list2 (intern (":version"),
                                make_number (version)));
   }
 
   /* Serial. */
-  {
-    size_t serial_size = 0;
-
-    err = fn_gnutls_x509_crt_get_serial (cert, NULL, &serial_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       char *serial = malloc (serial_size);
-       err = fn_gnutls_x509_crt_get_serial (cert, serial, &serial_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":serial-number"),
-                                   gnutls_hex_string (serial, serial_size,
-                                                      "")));
-       free (serial);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_serial (cert, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      void *serial = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_serial (cert, serial, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":serial-number"),
+                                 gnutls_hex_string (serial, buf_size, "")));
+      xfree (serial);
+    }
 
   /* Issuer. */
-  {
-    size_t dn_size = 0;
-
-    err = fn_gnutls_x509_crt_get_issuer_dn (cert, NULL, &dn_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       char *dn = malloc (dn_size);
-       err = fn_gnutls_x509_crt_get_issuer_dn (cert, dn, &dn_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":issuer"),
-                                   make_string (dn, dn_size)));
-       free (dn);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_issuer_dn (cert, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      char *dn = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_issuer_dn (cert, dn, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":issuer"),
+                                 make_string (dn, buf_size)));
+      xfree (dn);
+    }
 
   /* Validity. */
   {
-    char buf[11];
-    size_t buf_size = sizeof (buf);
+    /* Add 1 to the buffer size, since 1900 is added to tm_year and
+       that might add 1 to the year length.  */
+    char buf[INT_STRLEN_BOUND (int) + 1 + sizeof "-12-31"];
     struct tm t;
-    time_t tim = fn_gnutls_x509_crt_get_activation_time (cert);
+    time_t tim = gnutls_x509_crt_get_activation_time (cert);
 
-    if (gmtime_r (&tim, &t) != NULL &&
-       strftime (buf, buf_size, "%Y-%m-%d", &t) != 0)
+    if (gmtime_r (&tim, &t) && strftime (buf, sizeof buf, "%Y-%m-%d", &t))
       res = nconc2 (res, list2 (intern (":valid-from"), build_string (buf)));
 
-    tim = fn_gnutls_x509_crt_get_expiration_time (cert);
-    if (gmtime_r (&tim, &t) != NULL &&
-       strftime (buf, buf_size, "%Y-%m-%d", &t) != 0)
+    tim = gnutls_x509_crt_get_expiration_time (cert);
+    if (gmtime_r (&tim, &t) && strftime (buf, sizeof buf, "%Y-%m-%d", &t))
       res = nconc2 (res, list2 (intern (":valid-to"), build_string (buf)));
   }
 
   /* Subject. */
-  {
-    size_t dn_size = 0;
-
-    err = fn_gnutls_x509_crt_get_dn (cert, NULL, &dn_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       char *dn = malloc (dn_size);
-       err = fn_gnutls_x509_crt_get_dn (cert, dn, &dn_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":subject"),
-                                   make_string (dn, dn_size)));
-       free (dn);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_dn (cert, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      char *dn = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_dn (cert, dn, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":subject"),
+                                 make_string (dn, buf_size)));
+      xfree (dn);
+    }
 
   /* Versions older than 2.11 doesn't have these four functions. */
 #if GNUTLS_VERSION_NUMBER >= 0x020b00
@@ -878,117 +894,100 @@ gnutls_certificate_details (gnutls_x509_crt_t cert)
   {
     unsigned int bits;
 
-    err = fn_gnutls_x509_crt_get_pk_algorithm (cert, &bits);
+    err = gnutls_x509_crt_get_pk_algorithm (cert, &bits);
+    check_memory_full (err);
     if (err >= GNUTLS_E_SUCCESS)
       {
-       const char *name = fn_gnutls_pk_algorithm_get_name (err);
+       const char *name = gnutls_pk_algorithm_get_name (err);
        if (name)
          res = nconc2 (res, list2 (intern (":public-key-algorithm"),
                                    build_string (name)));
 
-       name = fn_gnutls_sec_param_get_name (fn_gnutls_pk_bits_to_sec_param
-                                            (err, bits));
+       name = gnutls_sec_param_get_name (gnutls_pk_bits_to_sec_param
+                                         (err, bits));
        res = nconc2 (res, list2 (intern (":certificate-security-level"),
                                  build_string (name)));
       }
   }
 
   /* Unique IDs. */
-  {
-    size_t buf_size = 0;
-
-    err = fn_gnutls_x509_crt_get_issuer_unique_id (cert, NULL, &buf_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       char *buf = malloc (buf_size);
-       err = fn_gnutls_x509_crt_get_issuer_unique_id (cert, buf, &buf_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":issuer-unique-id"),
-                                   make_string (buf, buf_size)));
-       free (buf);
-      }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_issuer_unique_id (cert, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      char *buf = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_issuer_unique_id (cert, buf, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":issuer-unique-id"),
+                                 make_string (buf, buf_size)));
+      xfree (buf);
+    }
 
-    buf_size = 0;
-    err = fn_gnutls_x509_crt_get_subject_unique_id (cert, NULL, &buf_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       char *buf = malloc (buf_size);
-       err = fn_gnutls_x509_crt_get_subject_unique_id (cert, buf, &buf_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":subject-unique-id"),
-                                   make_string (buf, buf_size)));
-       free (buf);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_subject_unique_id (cert, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      char *buf = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_subject_unique_id (cert, buf, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":subject-unique-id"),
+                                 make_string (buf, buf_size)));
+      xfree (buf);
+    }
 #endif
 
   /* Signature. */
-  {
-    size_t buf_size = 0;
-
-    err = fn_gnutls_x509_crt_get_signature_algorithm (cert);
-    if (err >= GNUTLS_E_SUCCESS)
-      {
-       const char *name = fn_gnutls_sign_get_name (err);
-       if (name)
-         res = nconc2 (res, list2 (intern (":signature-algorithm"),
-                                   build_string (name)));
-
-       err = fn_gnutls_x509_crt_get_signature (cert, NULL, &buf_size);
-       if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-         {
-           char *buf = malloc (buf_size);
-           err = fn_gnutls_x509_crt_get_signature (cert, buf, &buf_size);
-           if (err >= GNUTLS_E_SUCCESS) {
-             res = nconc2 (res, list2 (intern (":signature"),
-                                       gnutls_hex_string (buf, buf_size, "")));
-           }
-           free (buf);
-         }
-      }
-  }
+  err = gnutls_x509_crt_get_signature_algorithm (cert);
+  check_memory_full (err);
+  if (err >= GNUTLS_E_SUCCESS)
+    {
+      const char *name = gnutls_sign_get_name (err);
+      if (name)
+       res = nconc2 (res, list2 (intern (":signature-algorithm"),
+                                 build_string (name)));
+    }
 
   /* Public key ID. */
-  {
-    size_t buf_size = 0;
-
-    err = fn_gnutls_x509_crt_get_key_id (cert, 0, NULL, &buf_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       unsigned char *buf = malloc (buf_size);
-       err = fn_gnutls_x509_crt_get_key_id (cert, 0, buf, &buf_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":public-key-id"),
-                                   gnutls_hex_string ((char *)buf,
-                                                      buf_size, "sha1:")));
-       free (buf);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_key_id (cert, 0, NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      void *buf = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_key_id (cert, 0, buf, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":public-key-id"),
+                                 gnutls_hex_string (buf, buf_size, "sha1:")));
+      xfree (buf);
+    }
 
   /* Certificate fingerprint. */
-  {
-    size_t buf_size = 0;
-
-    err = fn_gnutls_x509_crt_get_fingerprint (cert, GNUTLS_DIG_SHA1,
-                                             NULL, &buf_size);
-    if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
-      {
-       unsigned char *buf = malloc (buf_size);
-       err = fn_gnutls_x509_crt_get_fingerprint (cert, GNUTLS_DIG_SHA1,
-                                                 buf, &buf_size);
-       if (err >= GNUTLS_E_SUCCESS)
-         res = nconc2 (res, list2 (intern (":certificate-id"),
-                                   gnutls_hex_string ((char *)buf,
-                                                      buf_size, "sha1:")));
-       free (buf);
-      }
-  }
+  buf_size = 0;
+  err = gnutls_x509_crt_get_fingerprint (cert, GNUTLS_DIG_SHA1,
+                                        NULL, &buf_size);
+  check_memory_full (err);
+  if (err == GNUTLS_E_SHORT_MEMORY_BUFFER)
+    {
+      void *buf = xmalloc (buf_size);
+      err = gnutls_x509_crt_get_fingerprint (cert, GNUTLS_DIG_SHA1,
+                                            buf, &buf_size);
+      check_memory_full (err);
+      if (err >= GNUTLS_E_SUCCESS)
+       res = nconc2 (res, list2 (intern (":certificate-id"),
+                                 gnutls_hex_string (buf, buf_size, "sha1:")));
+      xfree (buf);
+    }
 
   return res;
 }
 
 DEFUN ("gnutls-peer-status-warning-describe", Fgnutls_peer_status_warning_describe, Sgnutls_peer_status_warning_describe, 1, 1, 0,
-       doc: /* Describe the warning of a GnuTLS peer status from `gnutls-peer-status'.*/)
+       doc: /* Describe the warning of a GnuTLS peer status from `gnutls-peer-status'.  */)
   (Lisp_Object status_symbol)
 {
   CHECK_SYMBOL (status_symbol);
@@ -1029,6 +1028,7 @@ The return value is a property list with top-level keys :warnings and
 {
   Lisp_Object warnings = Qnil, result = Qnil;
   unsigned int verification;
+  gnutls_session_t state;
 
   CHECK_PROCESS (proc);
 
@@ -1073,24 +1073,56 @@ The return value is a property list with top-level keys :warnings and
                      (intern (":certificate"),
                       gnutls_certificate_details (XPROCESS (proc)->gnutls_certificate)));
 
+  state = XPROCESS (proc)->gnutls_state;
+
+  /* Diffie-Hellman prime bits. */
+  {
+    int bits = gnutls_dh_get_prime_bits (state);
+    check_memory_full (bits);
+    if (bits > 0)
+      result = nconc2 (result, list2 (intern (":diffie-hellman-prime-bits"),
+                                     make_number (bits)));
+  }
+
+  /* Key exchange. */
+  result = nconc2
+    (result, list2 (intern (":key-exchange"),
+                   build_string (gnutls_kx_get_name
+                                 (gnutls_kx_get (state)))));
+
+  /* Protocol name. */
+  result = nconc2
+    (result, list2 (intern (":protocol"),
+                   build_string (gnutls_protocol_get_name
+                                 (gnutls_protocol_get_version (state)))));
+
+  /* Cipher name. */
+  result = nconc2
+    (result, list2 (intern (":cipher"),
+                   build_string (gnutls_cipher_get_name
+                                 (gnutls_cipher_get (state)))));
+
+  /* MAC name. */
+  result = nconc2
+    (result, list2 (intern (":mac"),
+                   build_string (gnutls_mac_get_name
+                                 (gnutls_mac_get (state)))));
+
+
   return result;
 }
 
-
-/* Initializes global GnuTLS state to defaults.
-Call `gnutls-global-deinit' when GnuTLS usage is no longer needed.
-Returns zero on success.  */
+/* Initialize global GnuTLS state to defaults.
+   Call `gnutls-global-deinit' when GnuTLS usage is no longer needed.
+   Return zero on success.  */
 static Lisp_Object
 emacs_gnutls_global_init (void)
 {
   int ret = GNUTLS_E_SUCCESS;
 
   if (!gnutls_global_initialized)
-    {
-      fn_gnutls_global_set_mem_functions (xmalloc, xmalloc, NULL,
-                                         xrealloc, xfree);
-      ret = fn_gnutls_global_init ();
-    }
+    ret = gnutls_global_init ();
+
   gnutls_global_initialized = 1;
 
   return gnutls_make_error (ret);
@@ -1109,8 +1141,8 @@ gnutls_ip_address_p (char *string)
 }
 
 #if 0
-/* Deinitializes global GnuTLS state.
-See also `gnutls-global-init'.  */
+/* Deinitialize global GnuTLS state.
+   See also `gnutls-global-init'.  */
 static Lisp_Object
 emacs_gnutls_global_deinit (void)
 {
@@ -1239,18 +1271,18 @@ one trustfile (usually a CA bundle).  */)
 
   if (TYPE_RANGED_INTEGERP (int, loglevel))
     {
-      fn_gnutls_global_set_log_function (gnutls_log_function);
+      gnutls_global_set_log_function (gnutls_log_function);
 #ifdef HAVE_GNUTLS3
-      fn_gnutls_global_set_audit_log_function (gnutls_audit_log_function);
+      gnutls_global_set_audit_log_function (gnutls_audit_log_function);
 #endif
-      fn_gnutls_global_set_log_level (XINT (loglevel));
+      gnutls_global_set_log_level (XINT (loglevel));
       max_log_level = XINT (loglevel);
       XPROCESS (proc)->gnutls_log_level = max_log_level;
     }
 
   GNUTLS_LOG2 (1, max_log_level, "connecting to host:", c_hostname);
 
-  /* always initialize globals.  */
+  /* Always initialize globals.  */
   global_init = emacs_gnutls_global_init ();
   if (! NILP (Fgnutls_errorp (global_init)))
     return global_init;
@@ -1273,7 +1305,7 @@ one trustfile (usually a CA bundle).  */)
       unsigned int gnutls_verify_flags = GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT;
 
       GNUTLS_LOG (2, max_log_level, "allocating x509 credentials");
-      fn_gnutls_certificate_allocate_credentials (&x509_cred);
+      check_memory_full (gnutls_certificate_allocate_credentials (&x509_cred));
       XPROCESS (proc)->gnutls_x509_cred = x509_cred;
 
       verify_flags = Fplist_get (proplist, QCgnutls_bootprop_verify_flags);
@@ -1287,12 +1319,12 @@ one trustfile (usually a CA bundle).  */)
       else
        GNUTLS_LOG (2, max_log_level, "ignoring invalid verify-flags");
 
-      fn_gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags);
+      gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags);
     }
   else /* Qgnutls_anon: */
     {
       GNUTLS_LOG (2, max_log_level, "allocating anon credentials");
-      fn_gnutls_anon_allocate_client_credentials (&anon_cred);
+      check_memory_full (gnutls_anon_allocate_client_credentials (&anon_cred));
       XPROCESS (proc)->gnutls_anon_cred = anon_cred;
     }
 
@@ -1304,6 +1336,17 @@ one trustfile (usually a CA bundle).  */)
       int file_format = GNUTLS_X509_FMT_PEM;
       Lisp_Object tail;
 
+#if GNUTLS_VERSION_MAJOR +                                     \
+  (GNUTLS_VERSION_MINOR > 0 || GNUTLS_VERSION_PATCH >= 20) > 3
+      ret = gnutls_certificate_set_x509_system_trust (x509_cred);
+      if (ret < GNUTLS_E_SUCCESS)
+       {
+         check_memory_full (ret);
+         GNUTLS_LOG2i (4, max_log_level,
+                       "setting system trust failed with code ", ret);
+       }
+#endif
+
       for (tail = trustfiles; CONSP (tail); tail = XCDR (tail))
        {
          Lisp_Object trustfile = XCAR (tail);
@@ -1318,7 +1361,7 @@ one trustfile (usually a CA bundle).  */)
                 name using the current ANSI codepage.  */
              trustfile = ansi_encode_filename (trustfile);
 #endif
-             ret = fn_gnutls_certificate_set_x509_trust_file
+             ret = gnutls_certificate_set_x509_trust_file
                (x509_cred,
                 SSDATA (trustfile),
                 file_format);
@@ -1344,7 +1387,7 @@ one trustfile (usually a CA bundle).  */)
 #ifdef WINDOWSNT
              crlfile = ansi_encode_filename (crlfile);
 #endif
-             ret = fn_gnutls_certificate_set_x509_crl_file
+             ret = gnutls_certificate_set_x509_crl_file
                (x509_cred, SSDATA (crlfile), file_format);
 
              if (ret < GNUTLS_E_SUCCESS)
@@ -1373,7 +1416,7 @@ one trustfile (usually a CA bundle).  */)
              keyfile = ansi_encode_filename (keyfile);
              certfile = ansi_encode_filename (certfile);
 #endif
-             ret = fn_gnutls_certificate_set_x509_key_file
+             ret = gnutls_certificate_set_x509_key_file
                (x509_cred, SSDATA (certfile), SSDATA (keyfile), file_format);
 
              if (ret < GNUTLS_E_SUCCESS)
@@ -1395,7 +1438,7 @@ one trustfile (usually a CA bundle).  */)
   /* Call gnutls_init here: */
 
   GNUTLS_LOG (1, max_log_level, "gnutls_init");
-  ret = fn_gnutls_init (&state, GNUTLS_CLIENT);
+  ret = gnutls_init (&state, GNUTLS_CLIENT);
   XPROCESS (proc)->gnutls_state = state;
   if (ret < GNUTLS_E_SUCCESS)
     return gnutls_make_error (ret);
@@ -1414,27 +1457,25 @@ one trustfile (usually a CA bundle).  */)
     }
 
   GNUTLS_LOG (1, max_log_level, "setting the priority string");
-  ret = fn_gnutls_priority_set_direct (state,
-                                      priority_string_ptr,
-                                      NULL);
+  ret = gnutls_priority_set_direct (state, priority_string_ptr, NULL);
   if (ret < GNUTLS_E_SUCCESS)
     return gnutls_make_error (ret);
 
   GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY;
 
   if (INTEGERP (prime_bits))
-    fn_gnutls_dh_set_prime_bits (state, XUINT (prime_bits));
+    gnutls_dh_set_prime_bits (state, XUINT (prime_bits));
 
   ret = EQ (type, Qgnutls_x509pki)
-    ? fn_gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred)
-    : fn_gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred);
+    ? gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred)
+    : gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred);
   if (ret < GNUTLS_E_SUCCESS)
     return gnutls_make_error (ret);
 
   if (!gnutls_ip_address_p (c_hostname))
     {
-      ret = fn_gnutls_server_name_set (state, GNUTLS_NAME_DNS, c_hostname,
-                                      strlen (c_hostname));
+      ret = gnutls_server_name_set (state, GNUTLS_NAME_DNS, c_hostname,
+                                   strlen (c_hostname));
       if (ret < GNUTLS_E_SUCCESS)
        return gnutls_make_error (ret);
     }
@@ -1450,7 +1491,7 @@ one trustfile (usually a CA bundle).  */)
      check of the certificate's hostname with
      gnutls_x509_crt_check_hostname against :hostname.  */
 
-  ret = fn_gnutls_certificate_verify_peers2 (state, &peer_verification);
+  ret = gnutls_certificate_verify_peers2 (state, &peer_verification);
   if (ret < GNUTLS_E_SUCCESS)
     return gnutls_make_error (ret);
 
@@ -1488,47 +1529,50 @@ one trustfile (usually a CA bundle).  */)
   /* Up to here the process is the same for X.509 certificates and
      OpenPGP keys.  From now on X.509 certificates are assumed.  This
      can be easily extended to work with openpgp keys as well.  */
-  if (fn_gnutls_certificate_type_get (state) == GNUTLS_CRT_X509)
+  if (gnutls_certificate_type_get (state) == GNUTLS_CRT_X509)
     {
       gnutls_x509_crt_t gnutls_verify_cert;
       const gnutls_datum_t *gnutls_verify_cert_list;
       unsigned int gnutls_verify_cert_list_size;
 
-      ret = fn_gnutls_x509_crt_init (&gnutls_verify_cert);
+      ret = gnutls_x509_crt_init (&gnutls_verify_cert);
       if (ret < GNUTLS_E_SUCCESS)
        return gnutls_make_error (ret);
 
       gnutls_verify_cert_list =
-       fn_gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size);
+       gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size);
 
       if (gnutls_verify_cert_list == NULL)
        {
-         fn_gnutls_x509_crt_deinit (gnutls_verify_cert);
+         gnutls_x509_crt_deinit (gnutls_verify_cert);
          emacs_gnutls_deinit (proc);
          error ("No x509 certificate was found\n");
        }
 
       /* We only check the first certificate in the given chain.  */
-      ret = fn_gnutls_x509_crt_import (gnutls_verify_cert,
+      ret = gnutls_x509_crt_import (gnutls_verify_cert,
                                       &gnutls_verify_cert_list[0],
                                       GNUTLS_X509_FMT_DER);
 
       if (ret < GNUTLS_E_SUCCESS)
        {
-         fn_gnutls_x509_crt_deinit (gnutls_verify_cert);
+         gnutls_x509_crt_deinit (gnutls_verify_cert);
          return gnutls_make_error (ret);
        }
 
       XPROCESS (proc)->gnutls_certificate = gnutls_verify_cert;
 
-      if (!fn_gnutls_x509_crt_check_hostname (gnutls_verify_cert, c_hostname))
+      int err = gnutls_x509_crt_check_hostname (gnutls_verify_cert,
+                                               c_hostname);
+      check_memory_full (err);
+      if (!err)
        {
          XPROCESS (proc)->gnutls_extra_peer_verification |=
            CERTIFICATE_NOT_MATCHING;
           if (verify_error_all
               || !NILP (Fmember (QCgnutls_bootprop_hostname, verify_error)))
             {
-             fn_gnutls_x509_crt_deinit (gnutls_verify_cert);
+             gnutls_x509_crt_deinit (gnutls_verify_cert);
              emacs_gnutls_deinit (proc);
              error ("The x509 certificate does not match \"%s\"", c_hostname);
             }
@@ -1569,17 +1613,43 @@ This function may also return `gnutls-e-again', or
 
   state = XPROCESS (proc)->gnutls_state;
 
-  fn_gnutls_x509_crt_deinit (XPROCESS (proc)->gnutls_certificate);
+  gnutls_x509_crt_deinit (XPROCESS (proc)->gnutls_certificate);
 
-  ret = fn_gnutls_bye (state,
-                      NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR);
+  ret = gnutls_bye (state, NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR);
 
   return gnutls_make_error (ret);
 }
 
+#endif /* HAVE_GNUTLS */
+
+DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0,
+       doc: /* Return t if GnuTLS is available in this instance of Emacs.  */)
+     (void)
+{
+#ifdef HAVE_GNUTLS
+# ifdef WINDOWSNT
+  Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache);
+  if (CONSP (found))
+    return XCDR (found);
+  else
+    {
+      Lisp_Object status;
+      status = init_gnutls_functions () ? Qt : Qnil;
+      Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache);
+      return status;
+    }
+# else /* !WINDOWSNT */
+  return Qt;
+# endif         /* !WINDOWSNT */
+#else  /* !HAVE_GNUTLS */
+  return Qnil;
+#endif /* !HAVE_GNUTLS */
+}
+
 void
 syms_of_gnutls (void)
 {
+#ifdef HAVE_GNUTLS
   gnutls_global_initialized = 0;
 
   DEFSYM (Qgnutls_dll, "gnutls");
@@ -1621,7 +1691,6 @@ syms_of_gnutls (void)
   defsubr (&Sgnutls_boot);
   defsubr (&Sgnutls_deinit);
   defsubr (&Sgnutls_bye);
-  defsubr (&Sgnutls_available_p);
   defsubr (&Sgnutls_peer_status);
   defsubr (&Sgnutls_peer_status_warning_describe);
 
@@ -1631,6 +1700,8 @@ Set this larger than 0 to get debug output in the *Messages* buffer.
 1 is for important messages, 2 is for debug data, and higher numbers
 are as per the GnuTLS logging conventions.  */);
   global_gnutls_log_level = 0;
-}
 
-#endif /* HAVE_GNUTLS */
+#endif /* HAVE_GNUTLS */
+
+  defsubr (&Sgnutls_available_p);
+}