diff --git a/library/ssl_tls13_invasive.h b/library/ssl_tls13_invasive.h
index 4e39f90cfb..f874a88219 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 91cc4d9fc2..f6bea34031 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -137,182 +137,6 @@ static void ssl_tls13_hkdf_encode_label(
*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,