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https://github.com/Mbed-TLS/mbedtls.git
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sed -i -f md.sed include/mbedtls/ssl.h library/hmac_drbg.c programs/pkey/*.c programs/x509/*.c tests/scripts/generate_pkcs7_tests.py tests/suites/test_suite_random.data Then manually revert programs/pkey/ecdsa.c as it's using a low-level hash API. Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
307 lines
9.3 KiB
C
307 lines
9.3 KiB
C
/*
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* Diffie-Hellman-Merkle key exchange (server side)
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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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#include "mbedtls/build_info.h"
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_AES_C) && defined(MBEDTLS_DHM_C) && \
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defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_NET_C) && \
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defined(MBEDTLS_RSA_C) && defined(MBEDTLS_MD_CAN_SHA256) && \
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defined(MBEDTLS_FS_IO) && defined(MBEDTLS_CTR_DRBG_C) && \
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defined(MBEDTLS_MD_CAN_SHA1)
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#include "mbedtls/net_sockets.h"
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#include "mbedtls/aes.h"
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#include "mbedtls/dhm.h"
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#include "mbedtls/rsa.h"
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#include "mbedtls/sha1.h"
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include <stdio.h>
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#include <string.h>
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#endif
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#define SERVER_PORT "11999"
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#define PLAINTEXT "==Hello there!=="
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#if !defined(MBEDTLS_AES_C) || !defined(MBEDTLS_DHM_C) || \
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!defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_NET_C) || \
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!defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_MD_CAN_SHA256) || \
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!defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_CTR_DRBG_C) || \
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!defined(MBEDTLS_MD_CAN_SHA1)
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int main(void)
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{
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mbedtls_printf("MBEDTLS_AES_C and/or MBEDTLS_DHM_C and/or MBEDTLS_ENTROPY_C "
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"and/or MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
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"MBEDTLS_MD_CAN_SHA256 and/or MBEDTLS_FS_IO and/or "
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"MBEDTLS_CTR_DRBG_C not defined.\n");
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mbedtls_exit(0);
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}
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#else
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int main(void)
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{
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FILE *f;
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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size_t n, buflen;
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mbedtls_net_context listen_fd, client_fd;
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unsigned char buf[2048];
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unsigned char hash[32];
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unsigned char buf2[2];
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const char *pers = "dh_server";
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_rsa_context rsa;
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mbedtls_dhm_context dhm;
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mbedtls_aes_context aes;
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mbedtls_mpi N, P, Q, D, E;
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mbedtls_net_init(&listen_fd);
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mbedtls_net_init(&client_fd);
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mbedtls_dhm_init(&dhm);
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mbedtls_aes_init(&aes);
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mbedtls_ctr_drbg_init(&ctr_drbg);
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mbedtls_mpi_init(&N); mbedtls_mpi_init(&P); mbedtls_mpi_init(&Q);
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mbedtls_mpi_init(&D); mbedtls_mpi_init(&E);
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/*
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* 1. Setup the RNG
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*/
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mbedtls_printf("\n . Seeding the random number generator");
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fflush(stdout);
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mbedtls_entropy_init(&entropy);
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if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen(pers))) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
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goto exit;
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}
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/*
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* 2a. Read the server's private RSA key
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*/
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mbedtls_printf("\n . Reading private key from rsa_priv.txt");
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fflush(stdout);
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if ((f = fopen("rsa_priv.txt", "rb")) == NULL) {
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mbedtls_printf(" failed\n ! Could not open rsa_priv.txt\n" \
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" ! Please run rsa_genkey first\n\n");
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goto exit;
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}
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mbedtls_rsa_init(&rsa);
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if ((ret = mbedtls_mpi_read_file(&N, 16, f)) != 0 ||
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(ret = mbedtls_mpi_read_file(&E, 16, f)) != 0 ||
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(ret = mbedtls_mpi_read_file(&D, 16, f)) != 0 ||
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(ret = mbedtls_mpi_read_file(&P, 16, f)) != 0 ||
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(ret = mbedtls_mpi_read_file(&Q, 16, f)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_mpi_read_file returned %d\n\n",
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ret);
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fclose(f);
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goto exit;
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}
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fclose(f);
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if ((ret = mbedtls_rsa_import(&rsa, &N, &P, &Q, &D, &E)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_rsa_import returned %d\n\n",
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ret);
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goto exit;
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}
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if ((ret = mbedtls_rsa_complete(&rsa)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_rsa_complete returned %d\n\n",
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ret);
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goto exit;
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}
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/*
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* 2b. Get the DHM modulus and generator
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*/
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mbedtls_printf("\n . Reading DH parameters from dh_prime.txt");
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fflush(stdout);
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if ((f = fopen("dh_prime.txt", "rb")) == NULL) {
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mbedtls_printf(" failed\n ! Could not open dh_prime.txt\n" \
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" ! Please run dh_genprime first\n\n");
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goto exit;
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}
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if (mbedtls_mpi_read_file(&dhm.MBEDTLS_PRIVATE(P), 16, f) != 0 ||
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mbedtls_mpi_read_file(&dhm.MBEDTLS_PRIVATE(G), 16, f) != 0) {
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mbedtls_printf(" failed\n ! Invalid DH parameter file\n\n");
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fclose(f);
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goto exit;
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}
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fclose(f);
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/*
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* 3. Wait for a client to connect
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*/
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mbedtls_printf("\n . Waiting for a remote connection");
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fflush(stdout);
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if ((ret = mbedtls_net_bind(&listen_fd, NULL, SERVER_PORT, MBEDTLS_NET_PROTO_TCP)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
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goto exit;
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}
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if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
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NULL, 0, NULL)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_net_accept returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 4. Setup the DH parameters (P,G,Ys)
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*/
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mbedtls_printf("\n . Sending the server's DH parameters");
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fflush(stdout);
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memset(buf, 0, sizeof(buf));
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if ((ret =
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mbedtls_dhm_make_params(&dhm, (int) mbedtls_mpi_size(&dhm.MBEDTLS_PRIVATE(P)), buf, &n,
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mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_dhm_make_params returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 5. Sign the parameters and send them
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*/
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if ((ret = mbedtls_sha1(buf, n, hash)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_sha1 returned %d\n\n", ret);
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goto exit;
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}
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buf[n] = (unsigned char) (rsa.MBEDTLS_PRIVATE(len) >> 8);
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buf[n + 1] = (unsigned char) (rsa.MBEDTLS_PRIVATE(len));
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if ((ret = mbedtls_rsa_pkcs1_sign(&rsa, NULL, NULL, MBEDTLS_MD_SHA256,
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32, hash, buf + n + 2)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_rsa_pkcs1_sign returned %d\n\n", ret);
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goto exit;
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}
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buflen = n + 2 + rsa.MBEDTLS_PRIVATE(len);
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buf2[0] = (unsigned char) (buflen >> 8);
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buf2[1] = (unsigned char) (buflen);
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if ((ret = mbedtls_net_send(&client_fd, buf2, 2)) != 2 ||
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(ret = mbedtls_net_send(&client_fd, buf, buflen)) != (int) buflen) {
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mbedtls_printf(" failed\n ! mbedtls_net_send returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 6. Get the client's public value: Yc = G ^ Xc mod P
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*/
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mbedtls_printf("\n . Receiving the client's public value");
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fflush(stdout);
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memset(buf, 0, sizeof(buf));
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n = mbedtls_dhm_get_len(&dhm);
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if ((ret = mbedtls_net_recv(&client_fd, buf, n)) != (int) n) {
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mbedtls_printf(" failed\n ! mbedtls_net_recv returned %d\n\n", ret);
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goto exit;
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}
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if ((ret = mbedtls_dhm_read_public(&dhm, buf, n)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_dhm_read_public returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 7. Derive the shared secret: K = Ys ^ Xc mod P
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*/
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mbedtls_printf("\n . Shared secret: ");
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fflush(stdout);
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if ((ret = mbedtls_dhm_calc_secret(&dhm, buf, sizeof(buf), &n,
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mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_dhm_calc_secret returned %d\n\n", ret);
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goto exit;
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}
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for (n = 0; n < 16; n++) {
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mbedtls_printf("%02x", buf[n]);
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}
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/*
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* 8. Setup the AES-256 encryption key
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*
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* This is an overly simplified example; best practice is
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* to hash the shared secret with a random value to derive
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* the keying material for the encryption/decryption keys
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* and MACs.
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*/
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mbedtls_printf("...\n . Encrypting and sending the ciphertext");
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fflush(stdout);
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ret = mbedtls_aes_setkey_enc(&aes, buf, 256);
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if (ret != 0) {
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goto exit;
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}
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memcpy(buf, PLAINTEXT, 16);
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ret = mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_ENCRYPT, buf, buf);
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if (ret != 0) {
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goto exit;
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}
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if ((ret = mbedtls_net_send(&client_fd, buf, 16)) != 16) {
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mbedtls_printf(" failed\n ! mbedtls_net_send returned %d\n\n", ret);
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goto exit;
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}
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mbedtls_printf("\n\n");
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_mpi_free(&N); mbedtls_mpi_free(&P); mbedtls_mpi_free(&Q);
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mbedtls_mpi_free(&D); mbedtls_mpi_free(&E);
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mbedtls_net_free(&client_fd);
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mbedtls_net_free(&listen_fd);
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mbedtls_aes_free(&aes);
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mbedtls_rsa_free(&rsa);
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mbedtls_dhm_free(&dhm);
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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mbedtls_exit(exit_code);
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}
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#endif /* MBEDTLS_AES_C && MBEDTLS_DHM_C && MBEDTLS_ENTROPY_C &&
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MBEDTLS_NET_C && MBEDTLS_RSA_C && MBEDTLS_MD_CAN_SHA256 &&
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MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
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