diff --git a/library/ssl_tls13_invasive.h b/library/ssl_tls13_invasive.h
index 4e39f90..f874a88 100644
--- a/library/ssl_tls13_invasive.h
+++ b/library/ssl_tls13_invasive.h
@@ -26,60 +26,6 @@
 
 #if defined(MBEDTLS_TEST_HOOKS)
 
-/**
- *  \brief  Take the input keying material \p ikm and extract from it a
- *          fixed-length pseudorandom key \p prk.
- *
- *  \param       hash_alg  Hash algorithm to use.
- *  \param       salt      An optional salt value (a non-secret random value);
- *                         if the salt is not provided, a string of all zeros
- *                         of the length of the hash provided by \p alg is used
- *                         as the salt.
- *  \param       salt_len  The length in bytes of the optional \p salt.
- *  \param       ikm       The input keying material.
- *  \param       ikm_len   The length in bytes of \p ikm.
- *  \param[out]  prk       A pseudorandom key of \p prk_len bytes.
- *  \param       prk_size  Size of the \p prk buffer in bytes.
- *  \param[out]  prk_len   On success, the length in bytes of the
- *                         pseudorandom key in \p prk.
- *
- *  \return 0 on success.
- *  \return #PSA_ERROR_INVALID_ARGUMENT when the parameters are invalid.
- *  \return An PSA_ERROR_* error for errors returned from the underlying
- *          PSA layer.
- */
-psa_status_t mbedtls_psa_hkdf_extract( psa_algorithm_t hash_alg,
-                                       const unsigned char *salt, size_t salt_len,
-                                       const unsigned char *ikm, size_t ikm_len,
-                                       unsigned char *prk, size_t prk_size,
-                                       size_t *prk_len );
-
-/**
- *  \brief  Expand the supplied \p prk into several additional pseudorandom
- *          keys, which is the output of the HKDF.
- *
- *  \param  hash_alg  Hash algorithm to use.
- *  \param  prk       A pseudorandom key of \p prk_len bytes. \p prk is
- *                    usually the output from the HKDF extract step.
- *  \param  prk_len   The length in bytes of \p prk.
- *  \param  info      An optional context and application specific information
- *                    string. This can be a zero-length string.
- *  \param  info_len  The length of \p info in bytes.
- *  \param  okm       The output keying material of \p okm_len bytes.
- *  \param  okm_len   The length of the output keying material in bytes. This
- *                    must be less than or equal to
- *                    255 * #PSA_HASH_LENGTH( \p alg ) bytes.
- *
- *  \return 0 on success.
- *  \return #PSA_ERROR_INVALID_ARGUMENT when the parameters are invalid.
- *  \return An PSA_ERROR_* error for errors returned from the underlying
- *          PSA layer.
- */
-psa_status_t mbedtls_psa_hkdf_expand( psa_algorithm_t hash_alg,
-                                      const unsigned char *prk, size_t prk_len,
-                                      const unsigned char *info, size_t info_len,
-                                      unsigned char *okm, size_t okm_len );
-
 #endif /* MBEDTLS_TEST_HOOKS */
 
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index 91cc4d9..f6bea34 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -137,182 +137,6 @@
     *dst_len = total_hkdf_lbl_len;
 }
 
-MBEDTLS_STATIC_TESTABLE
-psa_status_t mbedtls_psa_hkdf_extract( psa_algorithm_t hash_alg,
-                                       const unsigned char *salt, size_t salt_len,
-                                       const unsigned char *ikm, size_t ikm_len,
-                                       unsigned char *prk, size_t prk_size,
-                                       size_t *prk_len )
-{
-    unsigned char null_salt[PSA_MAC_MAX_SIZE] = { '\0' };
-    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
-    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
-    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
-    psa_status_t destroy_status = PSA_ERROR_CORRUPTION_DETECTED;
-    psa_algorithm_t alg = PSA_ALG_HMAC( hash_alg );
-
-    if( salt == NULL || salt_len == 0 )
-    {
-        size_t hash_len;
-
-        if( salt_len != 0 )
-        {
-            return( PSA_ERROR_INVALID_ARGUMENT );
-        }
-
-        hash_len = PSA_HASH_LENGTH( alg );
-
-        if( hash_len == 0 )
-        {
-            return( PSA_ERROR_INVALID_ARGUMENT );
-        }
-
-        /* salt_len <= sizeof( salt ) because
-           PSA_HASH_LENGTH( alg ) <= PSA_MAC_MAX_SIZE. */
-        salt = null_salt;
-        salt_len = hash_len;
-    }
-
-    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_MESSAGE );
-    psa_set_key_algorithm( &attributes, alg );
-    psa_set_key_type( &attributes, PSA_KEY_TYPE_HMAC );
-
-    status = psa_import_key( &attributes, salt, salt_len, &key );
-    if( status != PSA_SUCCESS )
-    {
-        goto cleanup;
-    }
-
-    status = psa_mac_compute( key, alg, ikm, ikm_len, prk, prk_size, prk_len );
-
-cleanup:
-    destroy_status = psa_destroy_key( key );
-
-    return( ( status == PSA_SUCCESS ) ? destroy_status : status );
-}
-
-MBEDTLS_STATIC_TESTABLE
-psa_status_t mbedtls_psa_hkdf_expand( psa_algorithm_t hash_alg,
-                                      const unsigned char *prk, size_t prk_len,
-                                      const unsigned char *info, size_t info_len,
-                                      unsigned char *okm, size_t okm_len )
-{
-    size_t hash_len;
-    size_t where = 0;
-    size_t n;
-    size_t t_len = 0;
-    size_t i;
-    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
-    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
-    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
-    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
-    psa_status_t destroy_status = PSA_ERROR_CORRUPTION_DETECTED;
-    unsigned char t[PSA_MAC_MAX_SIZE];
-    psa_algorithm_t alg = PSA_ALG_HMAC( hash_alg );
-
-    if( okm == NULL )
-    {
-        return( PSA_ERROR_INVALID_ARGUMENT );
-    }
-
-    hash_len = PSA_HASH_LENGTH( alg );
-
-    if( prk_len < hash_len || hash_len == 0 )
-    {
-        return( PSA_ERROR_INVALID_ARGUMENT );
-    }
-
-    if( info == NULL )
-    {
-        info = (const unsigned char *) "";
-        info_len = 0;
-    }
-
-    n = okm_len / hash_len;
-
-    if( okm_len % hash_len != 0 )
-    {
-        n++;
-    }
-
-    /*
-     * Per RFC 5869 Section 2.3, okm_len must not exceed
-     * 255 times the hash length
-     */
-    if( n > 255 )
-    {
-        return( PSA_ERROR_INVALID_ARGUMENT );
-    }
-
-    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_MESSAGE );
-    psa_set_key_algorithm( &attributes, alg );
-    psa_set_key_type( &attributes, PSA_KEY_TYPE_HMAC );
-
-    status = psa_import_key( &attributes, prk, prk_len, &key );
-    if( status != PSA_SUCCESS )
-    {
-        goto cleanup;
-    }
-
-    memset( t, 0, hash_len );
-
-    /*
-     * Compute T = T(1) | T(2) | T(3) | ... | T(N)
-     * Where T(N) is defined in RFC 5869 Section 2.3
-     */
-    for( i = 1; i <= n; i++ )
-    {
-        size_t num_to_copy;
-        unsigned char c = i & 0xff;
-        size_t len;
-
-        status = psa_mac_sign_setup( &operation, key, alg );
-        if( status != PSA_SUCCESS )
-        {
-            goto cleanup;
-        }
-
-        status = psa_mac_update( &operation, t, t_len );
-        if( status != PSA_SUCCESS )
-        {
-            goto cleanup;
-        }
-
-        status = psa_mac_update( &operation, info, info_len );
-        if( status != PSA_SUCCESS )
-        {
-            goto cleanup;
-        }
-
-        /* The constant concatenated to the end of each T(n) is a single octet. */
-        status = psa_mac_update( &operation, &c, 1 );
-        if( status != PSA_SUCCESS )
-        {
-            goto cleanup;
-        }
-
-        status = psa_mac_sign_finish( &operation, t, PSA_MAC_MAX_SIZE, &len );
-        if( status != PSA_SUCCESS )
-        {
-            goto cleanup;
-        }
-
-        num_to_copy = i != n ? hash_len : okm_len - where;
-        memcpy( okm + where, t, num_to_copy );
-        where += hash_len;
-        t_len = hash_len;
-    }
-
-cleanup:
-    if( status != PSA_SUCCESS )
-        psa_mac_abort( &operation );
-    destroy_status = psa_destroy_key( key );
-
-    mbedtls_platform_zeroize( t, sizeof( t ) );
-
-    return( ( status == PSA_SUCCESS ) ? destroy_status : status );
-}
-
 int mbedtls_ssl_tls13_hkdf_expand_label(
                      psa_algorithm_t hash_alg,
                      const unsigned char *secret, size_t secret_len,