diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 933e460..8f6ff5f 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -255,10 +255,6 @@
 #error "MBEDTLS_PK_WRITE_C defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PKCS11_C) && !defined(MBEDTLS_PK_C)
-#error "MBEDTLS_PKCS11_C defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_PLATFORM_EXIT_ALT) && !defined(MBEDTLS_PLATFORM_C)
 #error "MBEDTLS_PLATFORM_EXIT_ALT defined, but not all prerequisites"
 #endif
@@ -493,11 +489,6 @@
 #error "MBEDTLS_RSA_C defined, but none of the PKCS1 versions enabled"
 #endif
 
-#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) &&                        \
-    ( !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_PKCS1_V21) )
-#error "MBEDTLS_X509_RSASSA_PSS_SUPPORT defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_THREADING_PTHREAD)
 #if !defined(MBEDTLS_THREADING_C) || defined(MBEDTLS_THREADING_IMPL)
 #error "MBEDTLS_THREADING_PTHREAD defined, but not all prerequisites"
@@ -525,38 +516,6 @@
 #error "MBEDTLS_VERSION_FEATURES defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_X509_USE_C) && ( !defined(MBEDTLS_BIGNUM_C) ||  \
-    !defined(MBEDTLS_OID_C) || !defined(MBEDTLS_ASN1_PARSE_C) ||      \
-    !defined(MBEDTLS_PK_PARSE_C) )
-#error "MBEDTLS_X509_USE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CREATE_C) && ( !defined(MBEDTLS_BIGNUM_C) ||  \
-    !defined(MBEDTLS_OID_C) || !defined(MBEDTLS_ASN1_WRITE_C) ||       \
-    !defined(MBEDTLS_PK_WRITE_C) )
-#error "MBEDTLS_X509_CREATE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
-#error "MBEDTLS_X509_CRT_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CRL_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
-#error "MBEDTLS_X509_CRL_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CSR_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
-#error "MBEDTLS_X509_CSR_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CRT_WRITE_C) && ( !defined(MBEDTLS_X509_CREATE_C) )
-#error "MBEDTLS_X509_CRT_WRITE_C defined, but not all prerequisites"
-#endif
-
-#if defined(MBEDTLS_X509_CSR_WRITE_C) && ( !defined(MBEDTLS_X509_CREATE_C) )
-#error "MBEDTLS_X509_CSR_WRITE_C defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_HAVE_INT32) && defined(MBEDTLS_HAVE_INT64)
 #error "MBEDTLS_HAVE_INT32 and MBEDTLS_HAVE_INT64 cannot be defined simultaneously"
 #endif /* MBEDTLS_HAVE_INT32 && MBEDTLS_HAVE_INT64 */
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index be0f192..4c86e90 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1053,83 +1053,6 @@
  */
 #define MBEDTLS_VERSION_FEATURES
 
-/**
- * \def MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
- *
- * If set, the X509 parser will not break-off when parsing an X509 certificate
- * and encountering an extension in a v1 or v2 certificate.
- *
- * Uncomment to prevent an error.
- */
-//#define MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
-
-/**
- * \def MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
- *
- * If set, the X509 parser will not break-off when parsing an X509 certificate
- * and encountering an unknown critical extension.
- *
- * \warning Depending on your PKI use, enabling this can be a security risk!
- *
- * Uncomment to prevent an error.
- */
-//#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
-
-/**
- * \def MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
- *
- * If set, this enables the X.509 API `mbedtls_x509_crt_verify_with_ca_cb()`
- * and the SSL API `mbedtls_ssl_conf_ca_cb()` which allow users to configure
- * the set of trusted certificates through a callback instead of a linked
- * list.
- *
- * This is useful for example in environments where a large number of trusted
- * certificates is present and storing them in a linked list isn't efficient
- * enough, or when the set of trusted certificates changes frequently.
- *
- * See the documentation of `mbedtls_x509_crt_verify_with_ca_cb()` and
- * `mbedtls_ssl_conf_ca_cb()` for more information.
- *
- * Uncomment to enable trusted certificate callbacks.
- */
-//#define MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
-
-/**
- * \def MBEDTLS_X509_CHECK_KEY_USAGE
- *
- * Enable verification of the keyUsage extension (CA and leaf certificates).
- *
- * Disabling this avoids problems with mis-issued and/or misused
- * (intermediate) CA and leaf certificates.
- *
- * \warning Depending on your PKI use, disabling this can be a security risk!
- *
- * Comment to skip keyUsage checking for both CA and leaf certificates.
- */
-#define MBEDTLS_X509_CHECK_KEY_USAGE
-
-/**
- * \def MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
- *
- * Enable verification of the extendedKeyUsage extension (leaf certificates).
- *
- * Disabling this avoids problems with mis-issued and/or misused certificates.
- *
- * \warning Depending on your PKI use, disabling this can be a security risk!
- *
- * Comment to skip extendedKeyUsage checking for certificates.
- */
-#define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
-
-/**
- * \def MBEDTLS_X509_RSASSA_PSS_SUPPORT
- *
- * Enable parsing and verification of X.509 certificates, CRLs and CSRS
- * signed with RSASSA-PSS (aka PKCS#1 v2.1).
- *
- * Comment this macro to disallow using RSASSA-PSS in certificates.
- */
-#define MBEDTLS_X509_RSASSA_PSS_SUPPORT
 /* \} name SECTION: mbed TLS feature support */
 
 /**
@@ -1260,8 +1183,7 @@
  * Enable the generic ASN1 parser.
  *
  * Module:  library/asn1.c
- * Caller:  library/x509.c
- *          library/dhm.c
+ * Caller:  library/dhm.c
  *          library/pkcs12.c
  *          library/pkcs5.c
  *          library/pkparse.c
@@ -1276,9 +1198,6 @@
  * Module:  library/asn1write.c
  * Caller:  library/ecdsa.c
  *          library/pkwrite.c
- *          library/x509_create.c
- *          library/x509write_crt.c
- *          library/x509write_csr.c
  */
 #define MBEDTLS_ASN1_WRITE_C
 
@@ -1437,18 +1356,6 @@
 #define MBEDTLS_CCM_C
 
 /**
- * \def MBEDTLS_CERTS_C
- *
- * Enable the test certificates.
- *
- * Module:  library/certs.c
- * Caller:
- *
- * This module is used for testing (ssl_client/server).
- */
-#define MBEDTLS_CERTS_C
-
-/**
  * \def MBEDTLS_CHACHA20_C
  *
  * Enable the ChaCha20 stream cipher.
@@ -1816,13 +1723,6 @@
  *          library/pkparse.c
  *          library/pkwrite.c
  *          library/rsa.c
- *          library/x509.c
- *          library/x509_create.c
- *          library/x509_crl.c
- *          library/x509_crt.c
- *          library/x509_csr.c
- *          library/x509write_crt.c
- *          library/x509write_csr.c
  *
  * This modules translates between OIDs and internal values.
  */
@@ -1850,9 +1750,6 @@
  * Module:  library/pem.c
  * Caller:  library/dhm.c
  *          library/pkparse.c
- *          library/x509_crl.c
- *          library/x509_crt.c
- *          library/x509_csr.c
  *
  * Requires: MBEDTLS_BASE64_C
  *
@@ -1867,8 +1764,6 @@
  *
  * Module:  library/pem.c
  * Caller:  library/pkwrite.c
- *          library/x509write_crt.c
- *          library/x509write_csr.c
  *
  * Requires: MBEDTLS_BASE64_C
  *
@@ -1895,8 +1790,6 @@
  * Enable the generic public (asymetric) key parser.
  *
  * Module:  library/pkparse.c
- * Caller:  library/x509_crt.c
- *          library/x509_csr.c
  *
  * Requires: MBEDTLS_PK_C
  *
@@ -1910,7 +1803,6 @@
  * Enable the generic public (asymetric) key writer.
  *
  * Module:  library/pkwrite.c
- * Caller:  library/x509write.c
  *
  * Requires: MBEDTLS_PK_C
  *
@@ -1932,21 +1824,6 @@
 #define MBEDTLS_PKCS5_C
 
 /**
- * \def MBEDTLS_PKCS11_C
- *
- * Enable wrapper for PKCS#11 smartcard support.
- *
- * Module:  library/pkcs11.c
- * Caller:  library/pk.c
- *
- * Requires: MBEDTLS_PK_C
- *
- * This module enables SSL/TLS PKCS #11 smartcard support.
- * Requires the presence of the PKCS#11 helper library (libpkcs11-helper)
- */
-//#define MBEDTLS_PKCS11_C
-
-/**
  * \def MBEDTLS_PKCS12_C
  *
  * Enable PKCS#12 PBE functions.
@@ -2047,7 +1924,6 @@
  *
  * Module:  library/rsa.c
  *          library/rsa_internal.c
- * Caller:  library/x509.c
  *
  * This module is used by the following key exchanges:
  *      RSA, DHE-RSA, ECDHE-RSA, RSA-PSK
@@ -2063,7 +1939,6 @@
  *
  * Module:  library/sha1.c
  * Caller:  library/md.c
- *          library/x509write_crt.c
  *
  * This module is required for SSL/TLS up to version 1.1, for TLS 1.2
  * depending on the handshake parameters, and for SHA1-signed certificates.
@@ -2159,106 +2034,6 @@
 #define MBEDTLS_VERSION_C
 
 /**
- * \def MBEDTLS_X509_USE_C
- *
- * Enable X.509 core for using certificates.
- *
- * Module:  library/x509.c
- * Caller:  library/x509_crl.c
- *          library/x509_crt.c
- *          library/x509_csr.c
- *
- * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_BIGNUM_C, MBEDTLS_OID_C,
- *           MBEDTLS_PK_PARSE_C
- *
- * This module is required for the X.509 parsing modules.
- */
-#define MBEDTLS_X509_USE_C
-
-/**
- * \def MBEDTLS_X509_CRT_PARSE_C
- *
- * Enable X.509 certificate parsing.
- *
- * Module:  library/x509_crt.c
- * Caller:  library/ssl_cli.c
- *          library/ssl_srv.c
- *          library/ssl_tls.c
- *
- * Requires: MBEDTLS_X509_USE_C
- *
- * This module is required for X.509 certificate parsing.
- */
-#define MBEDTLS_X509_CRT_PARSE_C
-
-/**
- * \def MBEDTLS_X509_CRL_PARSE_C
- *
- * Enable X.509 CRL parsing.
- *
- * Module:  library/x509_crl.c
- * Caller:  library/x509_crt.c
- *
- * Requires: MBEDTLS_X509_USE_C
- *
- * This module is required for X.509 CRL parsing.
- */
-#define MBEDTLS_X509_CRL_PARSE_C
-
-/**
- * \def MBEDTLS_X509_CSR_PARSE_C
- *
- * Enable X.509 Certificate Signing Request (CSR) parsing.
- *
- * Module:  library/x509_csr.c
- * Caller:  library/x509_crt_write.c
- *
- * Requires: MBEDTLS_X509_USE_C
- *
- * This module is used for reading X.509 certificate request.
- */
-#define MBEDTLS_X509_CSR_PARSE_C
-
-/**
- * \def MBEDTLS_X509_CREATE_C
- *
- * Enable X.509 core for creating certificates.
- *
- * Module:  library/x509_create.c
- *
- * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C, MBEDTLS_PK_WRITE_C
- *
- * This module is the basis for creating X.509 certificates and CSRs.
- */
-#define MBEDTLS_X509_CREATE_C
-
-/**
- * \def MBEDTLS_X509_CRT_WRITE_C
- *
- * Enable creating X.509 certificates.
- *
- * Module:  library/x509_crt_write.c
- *
- * Requires: MBEDTLS_X509_CREATE_C
- *
- * This module is required for X.509 certificate creation.
- */
-#define MBEDTLS_X509_CRT_WRITE_C
-
-/**
- * \def MBEDTLS_X509_CSR_WRITE_C
- *
- * Enable creating X.509 Certificate Signing Requests (CSR).
- *
- * Module:  library/x509_csr_write.c
- *
- * Requires: MBEDTLS_X509_CREATE_C
- *
- * This module is required for X.509 certificate request writing.
- */
-#define MBEDTLS_X509_CSR_WRITE_C
-
-/**
  * \def MBEDTLS_XTEA_C
  *
  * Enable the XTEA block cipher.