591 lines
22 KiB
C
591 lines
22 KiB
C
/** \file ssl_helpers.h
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*
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* \brief This file contains helper functions to set up a TLS connection.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SSL_HELPERS_H
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#define SSL_HELPERS_H
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#include "mbedtls/build_info.h"
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#include <string.h>
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#include <test/helpers.h>
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#include <test/macros.h>
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#include <test/random.h>
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#include <test/psa_crypto_helpers.h>
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#if defined(MBEDTLS_SSL_TLS_C)
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#include <ssl_misc.h>
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#include <mbedtls/timing.h>
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#include <mbedtls/debug.h>
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#include "hash_info.h"
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#include "test/certs.h"
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#if defined(MBEDTLS_SSL_CACHE_C)
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#include "mbedtls/ssl_cache.h"
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#endif
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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#define PSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \
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psa_to_ssl_errors, \
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psa_generic_status_to_mbedtls)
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#endif
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#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
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defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
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defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
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#define MBEDTLS_CAN_HANDLE_RSA_TEST_KEY
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#endif
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enum {
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#define MBEDTLS_SSL_TLS1_3_LABEL(name, string) \
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tls13_label_ ## name,
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MBEDTLS_SSL_TLS1_3_LABEL_LIST
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#undef MBEDTLS_SSL_TLS1_3_LABEL
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};
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typedef struct mbedtls_test_ssl_log_pattern {
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const char *pattern;
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size_t counter;
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} mbedtls_test_ssl_log_pattern;
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typedef struct mbedtls_test_handshake_test_options {
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const char *cipher;
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mbedtls_ssl_protocol_version client_min_version;
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mbedtls_ssl_protocol_version client_max_version;
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mbedtls_ssl_protocol_version server_min_version;
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mbedtls_ssl_protocol_version server_max_version;
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mbedtls_ssl_protocol_version expected_negotiated_version;
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int expected_handshake_result;
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int expected_ciphersuite;
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int pk_alg;
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int opaque_alg;
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int opaque_alg2;
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int opaque_usage;
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data_t *psk_str;
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int dtls;
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int srv_auth_mode;
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int serialize;
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int mfl;
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int cli_msg_len;
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int srv_msg_len;
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int expected_cli_fragments;
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int expected_srv_fragments;
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int renegotiate;
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int legacy_renegotiation;
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void *srv_log_obj;
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void *cli_log_obj;
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void (*srv_log_fun)(void *, int, const char *, int, const char *);
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void (*cli_log_fun)(void *, int, const char *, int, const char *);
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int resize_buffers;
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#if defined(MBEDTLS_SSL_CACHE_C)
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mbedtls_ssl_cache_context *cache;
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#endif
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} mbedtls_test_handshake_test_options;
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/*
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* Buffer structure for custom I/O callbacks.
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*/
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typedef struct mbedtls_test_ssl_buffer {
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size_t start;
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size_t content_length;
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size_t capacity;
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unsigned char *buffer;
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} mbedtls_test_ssl_buffer;
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/*
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* Context for a message metadata queue (fifo) that is on top of the ring buffer.
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*/
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typedef struct mbedtls_test_ssl_message_queue {
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size_t *messages;
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int pos;
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int num;
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int capacity;
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} mbedtls_test_ssl_message_queue;
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/*
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* Context for the I/O callbacks simulating network connection.
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*/
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#define MBEDTLS_MOCK_SOCKET_CONNECTED 1
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typedef struct mbedtls_test_mock_socket {
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int status;
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mbedtls_test_ssl_buffer *input;
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mbedtls_test_ssl_buffer *output;
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struct mbedtls_test_mock_socket *peer;
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} mbedtls_test_mock_socket;
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/* Errors used in the message socket mocks */
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#define MBEDTLS_TEST_ERROR_CONTEXT_ERROR -55
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#define MBEDTLS_TEST_ERROR_SEND_FAILED -66
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#define MBEDTLS_TEST_ERROR_RECV_FAILED -77
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/*
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* Structure used as an addon, or a wrapper, around the mocked sockets.
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* Contains an input queue, to which the other socket pushes metadata,
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* and an output queue, to which this one pushes metadata. This context is
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* considered as an owner of the input queue only, which is initialized and
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* freed in the respective setup and free calls.
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*/
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typedef struct mbedtls_test_message_socket_context {
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mbedtls_test_ssl_message_queue *queue_input;
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mbedtls_test_ssl_message_queue *queue_output;
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mbedtls_test_mock_socket *socket;
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} mbedtls_test_message_socket_context;
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#if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
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/*
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* Structure with endpoint's certificates for SSL communication tests.
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*/
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typedef struct mbedtls_test_ssl_endpoint_certificate {
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mbedtls_x509_crt *ca_cert;
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mbedtls_x509_crt *cert;
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mbedtls_pk_context *pkey;
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} mbedtls_test_ssl_endpoint_certificate;
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/*
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* Endpoint structure for SSL communication tests.
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*/
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typedef struct mbedtls_test_ssl_endpoint {
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const char *name;
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mbedtls_ssl_context ssl;
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mbedtls_ssl_config conf;
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mbedtls_test_mock_socket socket;
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mbedtls_test_ssl_endpoint_certificate cert;
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} mbedtls_test_ssl_endpoint;
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#endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
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/*
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* This function can be passed to mbedtls to receive output logs from it. In
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* this case, it will count the instances of a mbedtls_test_ssl_log_pattern
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* in the received logged messages.
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*/
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void mbedtls_test_ssl_log_analyzer(void *ctx, int level,
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const char *file, int line,
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const char *str);
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void mbedtls_test_init_handshake_options(
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mbedtls_test_handshake_test_options *opts);
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void mbedtls_test_free_handshake_options(
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mbedtls_test_handshake_test_options *opts);
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/*
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* Initialises \p buf. After calling this function it is safe to call
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* `mbedtls_test_ssl_buffer_free()` on \p buf.
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*/
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void mbedtls_test_ssl_buffer_init(mbedtls_test_ssl_buffer *buf);
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/*
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* Sets up \p buf. After calling this function it is safe to call
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* `mbedtls_test_ssl_buffer_put()` and `mbedtls_test_ssl_buffer_get()`
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* on \p buf.
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*/
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int mbedtls_test_ssl_buffer_setup(mbedtls_test_ssl_buffer *buf,
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size_t capacity);
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void mbedtls_test_ssl_buffer_free(mbedtls_test_ssl_buffer *buf);
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/*
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* Puts \p input_len bytes from the \p input buffer into the ring buffer \p buf.
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*
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* \p buf must have been initialized and set up by calling
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* `mbedtls_test_ssl_buffer_init()` and `mbedtls_test_ssl_buffer_setup()`.
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*
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* \retval \p input_len, if the data fits.
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* \retval 0 <= value < \p input_len, if the data does not fit.
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* \retval -1, if \p buf is NULL, it hasn't been set up or \p input_len is not
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* zero and \p input is NULL.
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*/
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int mbedtls_test_ssl_buffer_put(mbedtls_test_ssl_buffer *buf,
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const unsigned char *input, size_t input_len);
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/*
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* Gets \p output_len bytes from the ring buffer \p buf into the
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* \p output buffer. The output buffer can be NULL, in this case a part of the
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* ring buffer will be dropped, if the requested length is available.
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*
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* \p buf must have been initialized and set up by calling
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* `mbedtls_test_ssl_buffer_init()` and `mbedtls_test_ssl_buffer_setup()`.
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*
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* \retval \p output_len, if the data is available.
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* \retval 0 <= value < \p output_len, if the data is not available.
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* \retval -1, if \buf is NULL or it hasn't been set up.
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*/
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int mbedtls_test_ssl_buffer_get(mbedtls_test_ssl_buffer *buf,
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unsigned char *output, size_t output_len);
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/*
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* Errors used in the message transport mock tests
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*/
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#define MBEDTLS_TEST_ERROR_ARG_NULL -11
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#define MBEDTLS_TEST_ERROR_MESSAGE_TRUNCATED -44
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/*
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* Setup and free functions for the message metadata queue.
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*
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* \p capacity describes the number of message metadata chunks that can be held
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* within the queue.
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*
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* \retval 0, if a metadata queue of a given length can be allocated.
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* \retval MBEDTLS_ERR_SSL_ALLOC_FAILED, if allocation failed.
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*/
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int mbedtls_test_ssl_message_queue_setup(
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mbedtls_test_ssl_message_queue *queue, size_t capacity);
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void mbedtls_test_ssl_message_queue_free(
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mbedtls_test_ssl_message_queue *queue);
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/*
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* Push message length information onto the message metadata queue.
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* This will become the last element to leave it (fifo).
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*
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* \retval MBEDTLS_TEST_ERROR_ARG_NULL, if the queue is null.
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* \retval MBEDTLS_ERR_SSL_WANT_WRITE, if the queue is full.
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* \retval \p len, if the push was successful.
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*/
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int mbedtls_test_ssl_message_queue_push_info(
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mbedtls_test_ssl_message_queue *queue, size_t len);
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/*
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* Pop information about the next message length from the queue. This will be
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* the oldest inserted message length(fifo). \p msg_len can be null, in which
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* case the data will be popped from the queue but not copied anywhere.
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*
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* \retval MBEDTLS_TEST_ERROR_ARG_NULL, if the queue is null.
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* \retval MBEDTLS_ERR_SSL_WANT_READ, if the queue is empty.
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* \retval message length, if the pop was successful, up to the given
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\p buf_len.
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*/
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int mbedtls_test_ssl_message_queue_pop_info(
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mbedtls_test_ssl_message_queue *queue, size_t buf_len);
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/*
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* Setup and teardown functions for mock sockets.
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*/
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void mbedtls_test_mock_socket_init(mbedtls_test_mock_socket *socket);
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/*
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* Closes the socket \p socket.
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*
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* \p socket must have been previously initialized by calling
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* mbedtls_test_mock_socket_init().
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*
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* This function frees all allocated resources and both sockets are aware of the
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* new connection state.
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*
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* That is, this function does not simulate half-open TCP connections and the
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* phenomenon that when closing a UDP connection the peer is not aware of the
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* connection having been closed.
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*/
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void mbedtls_test_mock_socket_close(mbedtls_test_mock_socket *socket);
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/*
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* Establishes a connection between \p peer1 and \p peer2.
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*
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* \p peer1 and \p peer2 must have been previously initialized by calling
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* mbedtls_test_mock_socket_init().
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*
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* The capacities of the internal buffers are set to \p bufsize. Setting this to
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* the correct value allows for simulation of MTU, sanity testing the mock
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* implementation and mocking TCP connections with lower memory cost.
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*/
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int mbedtls_test_mock_socket_connect(mbedtls_test_mock_socket *peer1,
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mbedtls_test_mock_socket *peer2,
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size_t bufsize);
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/*
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* Callbacks for simulating blocking I/O over connection-oriented transport.
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*/
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int mbedtls_test_mock_tcp_send_b(void *ctx,
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const unsigned char *buf, size_t len);
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int mbedtls_test_mock_tcp_recv_b(void *ctx, unsigned char *buf, size_t len);
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/*
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* Callbacks for simulating non-blocking I/O over connection-oriented transport.
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*/
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int mbedtls_test_mock_tcp_send_nb(void *ctx,
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const unsigned char *buf, size_t len);
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int mbedtls_test_mock_tcp_recv_nb(void *ctx, unsigned char *buf, size_t len);
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void mbedtls_test_message_socket_init(
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mbedtls_test_message_socket_context *ctx);
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/*
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* Setup a given message socket context including initialization of
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* input/output queues to a chosen capacity of messages. Also set the
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* corresponding mock socket.
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*
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* \retval 0, if everything succeeds.
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* \retval MBEDTLS_ERR_SSL_ALLOC_FAILED, if allocation of a message
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* queue failed.
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*/
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int mbedtls_test_message_socket_setup(
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mbedtls_test_ssl_message_queue *queue_input,
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mbedtls_test_ssl_message_queue *queue_output,
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size_t queue_capacity,
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mbedtls_test_mock_socket *socket,
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mbedtls_test_message_socket_context *ctx);
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/*
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* Close a given message socket context, along with the socket itself. Free the
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* memory allocated by the input queue.
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*/
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void mbedtls_test_message_socket_close(
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mbedtls_test_message_socket_context *ctx);
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/*
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* Send one message through a given message socket context.
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*
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* \retval \p len, if everything succeeds.
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* \retval MBEDTLS_TEST_ERROR_CONTEXT_ERROR, if any of the needed context
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* elements or the context itself is null.
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* \retval MBEDTLS_TEST_ERROR_SEND_FAILED if
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* mbedtls_test_mock_tcp_send_b failed.
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* \retval MBEDTLS_ERR_SSL_WANT_WRITE, if the output queue is full.
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*
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* This function will also return any error from
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* mbedtls_test_ssl_message_queue_push_info.
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*/
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int mbedtls_test_mock_tcp_send_msg(void *ctx,
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const unsigned char *buf, size_t len);
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/*
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* Receive one message from a given message socket context and return message
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* length or an error.
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*
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* \retval message length, if everything succeeds.
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* \retval MBEDTLS_TEST_ERROR_CONTEXT_ERROR, if any of the needed context
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* elements or the context itself is null.
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* \retval MBEDTLS_TEST_ERROR_RECV_FAILED if
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* mbedtls_test_mock_tcp_recv_b failed.
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*
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* This function will also return any error other than
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* MBEDTLS_TEST_ERROR_MESSAGE_TRUNCATED from test_ssl_message_queue_peek_info.
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*/
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int mbedtls_test_mock_tcp_recv_msg(void *ctx,
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unsigned char *buf, size_t buf_len);
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#if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
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/*
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* Initializes \p ep_cert structure and assigns it to endpoint
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* represented by \p ep.
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*
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* \retval 0 on success, otherwise error code.
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*/
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int mbedtls_test_ssl_endpoint_certificate_init(mbedtls_test_ssl_endpoint *ep,
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int pk_alg,
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int opaque_alg, int opaque_alg2,
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int opaque_usage);
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/*
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* Initializes \p ep structure. It is important to call
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* `mbedtls_test_ssl_endpoint_free()` after calling this function
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* even if it fails.
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*
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* \p endpoint_type must be set as MBEDTLS_SSL_IS_SERVER or
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* MBEDTLS_SSL_IS_CLIENT.
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* \p pk_alg the algorithm to use, currently only MBEDTLS_PK_RSA and
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* MBEDTLS_PK_ECDSA are supported.
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* \p dtls_context - in case of DTLS - this is the context handling metadata.
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* \p input_queue - used only in case of DTLS.
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* \p output_queue - used only in case of DTLS.
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*
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* \retval 0 on success, otherwise error code.
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*/
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int mbedtls_test_ssl_endpoint_init(
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mbedtls_test_ssl_endpoint *ep, int endpoint_type,
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mbedtls_test_handshake_test_options *options,
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mbedtls_test_message_socket_context *dtls_context,
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mbedtls_test_ssl_message_queue *input_queue,
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mbedtls_test_ssl_message_queue *output_queue,
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uint16_t *group_list);
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/*
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* Deinitializes endpoint represented by \p ep.
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*/
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void mbedtls_test_ssl_endpoint_free(
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mbedtls_test_ssl_endpoint *ep,
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mbedtls_test_message_socket_context *context);
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/*
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* This function moves ssl handshake from \p ssl to prescribed \p state.
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* /p second_ssl is used as second endpoint and their sockets have to be
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* connected before calling this function.
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*
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* \retval 0 on success, otherwise error code.
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*/
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int mbedtls_test_move_handshake_to_state(mbedtls_ssl_context *ssl,
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mbedtls_ssl_context *second_ssl,
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int state);
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#endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
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/*
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* Helper function setting up inverse record transformations
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* using given cipher, hash, EtM mode, authentication tag length,
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* and version.
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*/
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#define CHK(x) \
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do \
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{ \
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if (!(x)) \
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{ \
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ret = -1; \
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goto cleanup; \
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} \
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} while (0)
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#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX
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#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_IN_LEN_MAX
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#else
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#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_OUT_LEN_MAX
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#endif
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
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defined(MBEDTLS_CIPHER_MODE_CBC) && defined(MBEDTLS_AES_C)
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int mbedtls_test_psa_cipher_encrypt_helper(mbedtls_ssl_transform *transform,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *input,
|
|
size_t ilen,
|
|
unsigned char *output,
|
|
size_t *olen);
|
|
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && MBEDTLS_CIPHER_MODE_CBC &&
|
|
MBEDTLS_AES_C */
|
|
|
|
int mbedtls_test_ssl_build_transforms(mbedtls_ssl_transform *t_in,
|
|
mbedtls_ssl_transform *t_out,
|
|
int cipher_type, int hash_id,
|
|
int etm, int tag_mode,
|
|
mbedtls_ssl_protocol_version tls_version,
|
|
size_t cid0_len,
|
|
size_t cid1_len);
|
|
|
|
/*
|
|
* Populate a session structure for serialization tests.
|
|
* Choose dummy values, mostly non-0 to distinguish from the init default.
|
|
*/
|
|
int mbedtls_test_ssl_tls12_populate_session(mbedtls_ssl_session *session,
|
|
int ticket_len,
|
|
const char *crt_file);
|
|
|
|
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
|
|
int mbedtls_test_ssl_tls13_populate_session(mbedtls_ssl_session *session,
|
|
int ticket_len,
|
|
int endpoint_type);
|
|
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
|
|
|
|
/*
|
|
* Perform data exchanging between \p ssl_1 and \p ssl_2 and check if the
|
|
* message was sent in the correct number of fragments.
|
|
*
|
|
* /p ssl_1 and /p ssl_2 Endpoints represented by mbedtls_ssl_context. Both
|
|
* of them must be initialized and connected
|
|
* beforehand.
|
|
* /p msg_len_1 and /p msg_len_2 specify the size of the message to send.
|
|
* /p expected_fragments_1 and /p expected_fragments_2 determine in how many
|
|
* fragments the message should be sent.
|
|
* expected_fragments is 0: can be used for DTLS testing while the message
|
|
* size is larger than MFL. In that case the message
|
|
* cannot be fragmented and sent to the second
|
|
* endpoint.
|
|
* This value can be used for negative tests.
|
|
* expected_fragments is 1: can be used for TLS/DTLS testing while the
|
|
* message size is below MFL
|
|
* expected_fragments > 1: can be used for TLS testing while the message
|
|
* size is larger than MFL
|
|
*
|
|
* \retval 0 on success, otherwise error code.
|
|
*/
|
|
int mbedtls_test_ssl_exchange_data(
|
|
mbedtls_ssl_context *ssl_1,
|
|
int msg_len_1, const int expected_fragments_1,
|
|
mbedtls_ssl_context *ssl_2,
|
|
int msg_len_2, const int expected_fragments_2);
|
|
|
|
#if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
|
|
void mbedtls_test_ssl_perform_handshake(
|
|
mbedtls_test_handshake_test_options *options);
|
|
#endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
|
|
|
|
#if defined(MBEDTLS_TEST_HOOKS)
|
|
/*
|
|
* Tweak vector lengths in a TLS 1.3 Certificate message
|
|
*
|
|
* \param[in] buf Buffer containing the Certificate message to tweak
|
|
* \param[in]]out] end End of the buffer to parse
|
|
* \param tweak Tweak identifier (from 1 to the number of tweaks).
|
|
* \param[out] expected_result Error code expected from the parsing function
|
|
* \param[out] args Arguments of the MBEDTLS_SSL_CHK_BUF_READ_PTR call that
|
|
* is expected to fail. All zeroes if no
|
|
* MBEDTLS_SSL_CHK_BUF_READ_PTR failure is expected.
|
|
*/
|
|
int mbedtls_test_tweak_tls13_certificate_msg_vector_len(
|
|
unsigned char *buf, unsigned char **end, int tweak,
|
|
int *expected_result, mbedtls_ssl_chk_buf_ptr_args *args);
|
|
#endif /* MBEDTLS_TEST_HOOKS */
|
|
|
|
#define ECJPAKE_TEST_PWD "bla"
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
#define ECJPAKE_TEST_SET_PASSWORD(exp_ret_val) \
|
|
ret = (use_opaque_arg) ? \
|
|
mbedtls_ssl_set_hs_ecjpake_password_opaque(&ssl, pwd_slot) : \
|
|
mbedtls_ssl_set_hs_ecjpake_password(&ssl, pwd_string, pwd_len); \
|
|
TEST_EQUAL(ret, exp_ret_val)
|
|
#else
|
|
#define ECJPAKE_TEST_SET_PASSWORD(exp_ret_val) \
|
|
ret = mbedtls_ssl_set_hs_ecjpake_password(&ssl, \
|
|
pwd_string, pwd_len); \
|
|
TEST_EQUAL(ret, exp_ret_val)
|
|
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
|
|
|
#define TEST_AVAILABLE_ECC(tls_id_, group_id_, psa_family_, psa_bits_) \
|
|
TEST_EQUAL(mbedtls_ssl_get_ecp_group_id_from_tls_id(tls_id_), \
|
|
group_id_); \
|
|
TEST_EQUAL(mbedtls_ssl_get_tls_id_from_ecp_group_id(group_id_), \
|
|
tls_id_); \
|
|
TEST_EQUAL(mbedtls_ssl_get_psa_curve_info_from_tls_id(tls_id_, \
|
|
&psa_family, &psa_bits), PSA_SUCCESS); \
|
|
TEST_EQUAL(psa_family_, psa_family); \
|
|
TEST_EQUAL(psa_bits_, psa_bits);
|
|
|
|
#define TEST_UNAVAILABLE_ECC(tls_id_, group_id_, psa_family_, psa_bits_) \
|
|
TEST_EQUAL(mbedtls_ssl_get_ecp_group_id_from_tls_id(tls_id_), \
|
|
MBEDTLS_ECP_DP_NONE); \
|
|
TEST_EQUAL(mbedtls_ssl_get_tls_id_from_ecp_group_id(group_id_), \
|
|
0); \
|
|
TEST_EQUAL(mbedtls_ssl_get_psa_curve_info_from_tls_id(tls_id_, \
|
|
&psa_family, &psa_bits), \
|
|
PSA_ERROR_NOT_SUPPORTED);
|
|
|
|
#endif /* MBEDTLS_SSL_TLS_C */
|
|
|
|
#endif /* SSL_HELPERS_H */
|