diff --git a/include/mbedtls/x509.h b/include/mbedtls/x509.h
index e2e0667..be63612 100644
--- a/include/mbedtls/x509.h
+++ b/include/mbedtls/x509.h
@@ -307,6 +307,7 @@
 mbedtls_x509_san_list;
 
 /** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
+/** \} addtogroup x509_module */
 
 /**
  * \brief          Store the certificate DN in printable form into buf;
@@ -321,201 +322,7 @@
  */
 int mbedtls_x509_dn_gets(char *buf, size_t size, const mbedtls_x509_name *dn);
 
-/**
- * \brief          Return the next relative DN in an X509 name.
- *
- * \note           Intended use is to compare function result to dn->next
- *                 in order to detect boundaries of multi-valued RDNs.
- *
- * \param dn       Current node in the X509 name
- *
- * \return         Pointer to the first attribute-value pair of the
- *                 next RDN in sequence, or NULL if end is reached.
- */
-static inline mbedtls_x509_name *mbedtls_x509_dn_get_next(
-    mbedtls_x509_name *dn)
-{
-    while (dn->MBEDTLS_PRIVATE(next_merged) && dn->next != NULL) {
-        dn = dn->next;
-    }
-    return dn->next;
-}
-
-/**
- * \brief          Store the certificate serial in printable form into buf;
- *                 no more than size characters will be written.
- *
- * \param buf      Buffer to write to
- * \param size     Maximum size of buffer
- * \param serial   The X509 serial to represent
- *
- * \return         The length of the string written (not including the
- *                 terminated nul byte), or a negative error code.
- */
-int mbedtls_x509_serial_gets(char *buf, size_t size, const mbedtls_x509_buf *serial);
-
-/**
- * \brief          Compare pair of mbedtls_x509_time.
- *
- * \param t1       mbedtls_x509_time to compare
- * \param t2       mbedtls_x509_time to compare
- *
- * \return         < 0 if t1 is before t2
- *                   0 if t1 equals t2
- *                 > 0 if t1 is after t2
- */
-int mbedtls_x509_time_cmp(const mbedtls_x509_time *t1, const mbedtls_x509_time *t2);
-
-#if defined(MBEDTLS_HAVE_TIME_DATE)
-/**
- * \brief          Fill mbedtls_x509_time with provided mbedtls_time_t.
- *
- * \param tt       mbedtls_time_t to convert
- * \param now      mbedtls_x509_time to fill with converted mbedtls_time_t
- *
- * \return         \c 0 on success
- * \return         A non-zero return value on failure.
- */
-int mbedtls_x509_time_gmtime(mbedtls_time_t tt, mbedtls_x509_time *now);
-#endif /* MBEDTLS_HAVE_TIME_DATE */
-
-/**
- * \brief          Check a given mbedtls_x509_time against the system time
- *                 and tell if it's in the past.
- *
- * \note           Intended usage is "if( is_past( valid_to ) ) ERROR".
- *                 Hence the return value of 1 if on internal errors.
- *
- * \param to       mbedtls_x509_time to check
- *
- * \return         1 if the given time is in the past or an error occurred,
- *                 0 otherwise.
- */
-int mbedtls_x509_time_is_past(const mbedtls_x509_time *to);
-
-/**
- * \brief          Check a given mbedtls_x509_time against the system time
- *                 and tell if it's in the future.
- *
- * \note           Intended usage is "if( is_future( valid_from ) ) ERROR".
- *                 Hence the return value of 1 if on internal errors.
- *
- * \param from     mbedtls_x509_time to check
- *
- * \return         1 if the given time is in the future or an error occurred,
- *                 0 otherwise.
- */
-int mbedtls_x509_time_is_future(const mbedtls_x509_time *from);
-
-/**
- * \brief          This function parses an item in the SubjectAlternativeNames
- *                 extension. Please note that this function might allocate
- *                 additional memory for a subject alternative name, thus
- *                 mbedtls_x509_free_subject_alt_name has to be called
- *                 to dispose of this additional memory afterwards.
- *
- * \param san_buf  The buffer holding the raw data item of the subject
- *                 alternative name.
- * \param san      The target structure to populate with the parsed presentation
- *                 of the subject alternative name encoded in \p san_buf.
- *
- * \note           Supported GeneralName types, as defined in RFC 5280:
- *                 "rfc822Name", "dnsName", "directoryName",
- *                 "uniformResourceIdentifier" and "hardware_module_name"
- *                 of type "otherName", as defined in RFC 4108.
- *
- * \note           This function should be called on a single raw data of
- *                 subject alternative name. For example, after successful
- *                 certificate parsing, one must iterate on every item in the
- *                 \c crt->subject_alt_names sequence, and pass it to
- *                 this function.
- *
- * \warning        The target structure contains pointers to the raw data of the
- *                 parsed certificate, and its lifetime is restricted by the
- *                 lifetime of the certificate.
- *
- * \return         \c 0 on success
- * \return         #MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE for an unsupported
- *                 SAN type.
- * \return         Another negative value for any other failure.
- */
-int mbedtls_x509_parse_subject_alt_name(const mbedtls_x509_buf *san_buf,
-                                        mbedtls_x509_subject_alternative_name *san);
-/**
- * \brief          Unallocate all data related to subject alternative name
- *
- * \param san      SAN structure - extra memory owned by this structure will be freed
- */
-void mbedtls_x509_free_subject_alt_name(mbedtls_x509_subject_alternative_name *san);
-
-/** \} addtogroup x509_module */
-
-/*
- * Internal module functions. You probably do not want to use these unless you
- * know you do.
- */
-int mbedtls_x509_get_name(unsigned char **p, const unsigned char *end,
-                          mbedtls_x509_name *cur);
-int mbedtls_x509_get_alg_null(unsigned char **p, const unsigned char *end,
-                              mbedtls_x509_buf *alg);
-int mbedtls_x509_get_alg(unsigned char **p, const unsigned char *end,
-                         mbedtls_x509_buf *alg, mbedtls_x509_buf *params);
-#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
-int mbedtls_x509_get_rsassa_pss_params(const mbedtls_x509_buf *params,
-                                       mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
-                                       int *salt_len);
-#endif
-int mbedtls_x509_get_sig(unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig);
-int mbedtls_x509_get_sig_alg(const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
-                             mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
-                             void **sig_opts);
-int mbedtls_x509_get_time(unsigned char **p, const unsigned char *end,
-                          mbedtls_x509_time *t);
-int mbedtls_x509_get_serial(unsigned char **p, const unsigned char *end,
-                            mbedtls_x509_buf *serial);
-int mbedtls_x509_get_ext(unsigned char **p, const unsigned char *end,
-                         mbedtls_x509_buf *ext, int tag);
-#if !defined(MBEDTLS_X509_REMOVE_INFO)
-int mbedtls_x509_sig_alg_gets(char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
-                              mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
-                              const void *sig_opts);
-#endif
-int mbedtls_x509_key_size_helper(char *buf, size_t buf_size, const char *name);
 int mbedtls_x509_string_to_names(mbedtls_asn1_named_data **head, const char *name);
-int mbedtls_x509_set_extension(mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
-                               int critical, const unsigned char *val,
-                               size_t val_len);
-int mbedtls_x509_write_extensions(unsigned char **p, unsigned char *start,
-                                  mbedtls_asn1_named_data *first);
-int mbedtls_x509_write_names(unsigned char **p, unsigned char *start,
-                             mbedtls_asn1_named_data *first);
-int mbedtls_x509_write_sig(unsigned char **p, unsigned char *start,
-                           const char *oid, size_t oid_len,
-                           unsigned char *sig, size_t size,
-                           mbedtls_pk_type_t pk_alg);
-int mbedtls_x509_get_ns_cert_type(unsigned char **p,
-                                  const unsigned char *end,
-                                  unsigned char *ns_cert_type);
-int mbedtls_x509_get_key_usage(unsigned char **p,
-                               const unsigned char *end,
-                               unsigned int *key_usage);
-int mbedtls_x509_get_subject_alt_name(unsigned char **p,
-                                      const unsigned char *end,
-                                      mbedtls_x509_sequence *subject_alt_name);
-int mbedtls_x509_get_subject_alt_name_ext(unsigned char **p,
-                                          const unsigned char *end,
-                                          mbedtls_x509_sequence *subject_alt_name);
-int mbedtls_x509_info_subject_alt_name(char **buf, size_t *size,
-                                       const mbedtls_x509_sequence
-                                       *subject_alt_name,
-                                       const char *prefix);
-int mbedtls_x509_info_cert_type(char **buf, size_t *size,
-                                unsigned char ns_cert_type);
-int mbedtls_x509_info_key_usage(char **buf, size_t *size,
-                                unsigned int key_usage);
-
-int mbedtls_x509_write_set_san_common(mbedtls_asn1_named_data **extensions,
-                                      const mbedtls_x509_san_list *san_list);
 
 /**
  * \brief          This function parses a CN string as an IP address.
@@ -547,4 +354,4 @@
 }
 #endif
 
-#endif /* x509.h */
+#endif /* MBEDTLS_X509_H */