mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-03-14 07:20:52 +00:00
programs: remove dh_client and dh_server
These sample programs depend on MBEDTLS_DHM_C which is being removed, so they should be as well. Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
parent
3b3c652ddc
commit
540e7f3738
@ -41,9 +41,7 @@ APPS = \
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hash/generic_sum \
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hash/hello \
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hash/md_hmac_demo \
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pkey/dh_client \
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pkey/dh_genprime \
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pkey/dh_server \
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pkey/ecdh_curve25519 \
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pkey/ecdsa \
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pkey/gen_key \
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@ -177,18 +175,10 @@ hash/md_hmac_demo$(EXEXT): hash/md_hmac_demo.c $(DEP)
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echo " CC hash/md_hmac_demo.c"
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$(CC) $(LOCAL_CFLAGS) $(CFLAGS) hash/md_hmac_demo.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
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pkey/dh_client$(EXEXT): pkey/dh_client.c $(DEP)
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echo " CC pkey/dh_client.c"
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$(CC) $(LOCAL_CFLAGS) $(CFLAGS) pkey/dh_client.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
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pkey/dh_genprime$(EXEXT): pkey/dh_genprime.c $(DEP)
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echo " CC pkey/dh_genprime.c"
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$(CC) $(LOCAL_CFLAGS) $(CFLAGS) pkey/dh_genprime.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
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pkey/dh_server$(EXEXT): pkey/dh_server.c $(DEP)
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echo " CC pkey/dh_server.c"
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$(CC) $(LOCAL_CFLAGS) $(CFLAGS) pkey/dh_server.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
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pkey/ecdh_curve25519$(EXEXT): pkey/ecdh_curve25519.c $(DEP)
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echo " CC pkey/ecdh_curve25519.c"
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$(CC) $(LOCAL_CFLAGS) $(CFLAGS) pkey/ecdh_curve25519.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
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@ -41,8 +41,6 @@ This subdirectory mostly contains sample programs that illustrate specific featu
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### Diffie-Hellman key exchange examples
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* [`pkey/dh_client.c`](pkey/dh_client.c), [`pkey/dh_server.c`](pkey/dh_server.c): secure channel demonstrators (client, server). This pair of programs illustrates how to set up a secure channel using RSA for authentication and Diffie-Hellman to generate a shared AES session key.
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* [`pkey/ecdh_curve25519.c`](pkey/ecdh_curve25519.c): demonstration of a elliptic curve Diffie-Hellman (ECDH) key agreement.
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### Bignum (`mpi`) usage examples
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@ -1,16 +1,3 @@
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set(executables_mbedtls
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dh_client
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dh_server
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)
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add_dependencies(${programs_target} ${executables_mbedtls})
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foreach(exe IN LISTS executables_mbedtls)
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add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
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set_base_compile_options(${exe})
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target_link_libraries(${exe} ${mbedtls_target} ${CMAKE_THREAD_LIBS_INIT})
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target_include_directories(${exe} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../framework/tests/include)
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endforeach()
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set(executables_mbedcrypto
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dh_genprime
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ecdh_curve25519
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@ -40,6 +27,6 @@ foreach(exe IN LISTS executables_mbedcrypto)
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target_include_directories(${exe} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../framework/tests/include)
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endforeach()
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install(TARGETS ${executables_mbedtls} ${executables_mbedcrypto}
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install(TARGETS ${executables_mbedcrypto}
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DESTINATION "bin"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
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@ -1,288 +0,0 @@
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/*
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* Diffie-Hellman-Merkle key exchange (client side)
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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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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/* md.h is included this early since MD_CAN_XXX macros are defined there. */
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#include "mbedtls/md.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_SHA256_C) && \
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defined(MBEDTLS_FS_IO) && defined(MBEDTLS_CTR_DRBG_C)
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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/sha256.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_NAME "localhost"
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#define SERVER_PORT "11999"
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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_SHA256_C) || \
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!defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_CTR_DRBG_C)
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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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"PSA_WANT_ALG_SHA_256 and/or MBEDTLS_FS_IO and/or "
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"MBEDTLS_CTR_DRBG_C and/or MBEDTLS_SHA1_C not defined.\n");
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mbedtls_exit(0);
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}
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#elif defined(MBEDTLS_BLOCK_CIPHER_NO_DECRYPT)
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int main(void)
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{
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mbedtls_printf("MBEDTLS_BLOCK_CIPHER_NO_DECRYPT 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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unsigned int mdlen;
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size_t n, buflen;
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mbedtls_net_context server_fd;
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unsigned char *p, *end;
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unsigned char buf[2048];
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unsigned char hash[MBEDTLS_MD_MAX_SIZE];
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mbedtls_mpi N, E;
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const char *pers = "dh_client";
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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_net_init(&server_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);
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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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* 2. Read the server's public RSA key
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*/
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mbedtls_printf("\n . Reading public key from rsa_pub.txt");
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fflush(stdout);
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if ((f = fopen("rsa_pub.txt", "rb")) == NULL) {
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mbedtls_printf(" failed\n ! Could not open rsa_pub.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_rsa_import(&rsa, &N, NULL, NULL, NULL, &E) != 0)) {
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mbedtls_printf(" failed\n ! mbedtls_mpi_read_file returned %d\n\n", 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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/*
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* 3. Initiate the connection
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*/
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mbedtls_printf("\n . Connecting to tcp/%s/%s", SERVER_NAME,
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SERVER_PORT);
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fflush(stdout);
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if ((ret = mbedtls_net_connect(&server_fd, SERVER_NAME,
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SERVER_PORT, MBEDTLS_NET_PROTO_TCP)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_net_connect returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 4a. First get the buffer length
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*/
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mbedtls_printf("\n . Receiving 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 = mbedtls_net_recv(&server_fd, buf, 2)) != 2) {
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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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n = buflen = (buf[0] << 8) | buf[1];
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if (buflen < 1 || buflen > sizeof(buf)) {
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mbedtls_printf(" failed\n ! Got an invalid buffer length\n\n");
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goto exit;
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}
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/*
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* 4b. Get the DHM parameters: P, G and Ys = G^Xs mod P
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*/
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memset(buf, 0, sizeof(buf));
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if ((ret = mbedtls_net_recv(&server_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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p = buf, end = buf + buflen;
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if ((ret = mbedtls_dhm_read_params(&dhm, &p, end)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_dhm_read_params returned %d\n\n", ret);
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goto exit;
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}
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n = mbedtls_dhm_get_len(&dhm);
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if (n < 64 || n > 512) {
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mbedtls_printf(" failed\n ! Invalid DHM modulus size\n\n");
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goto exit;
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}
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/*
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* 5. Check that the server's RSA signature matches
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* the SHA-256 hash of (P,G,Ys)
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*/
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mbedtls_printf("\n . Verifying the server's RSA signature");
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fflush(stdout);
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p += 2;
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if ((n = (size_t) (end - p)) != mbedtls_rsa_get_len(&rsa)) {
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mbedtls_printf(" failed\n ! Invalid RSA signature size\n\n");
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goto exit;
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}
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mdlen = (unsigned int) mbedtls_md_get_size(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256));
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if (mdlen == 0) {
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mbedtls_printf(" failed\n ! Invalid digest type\n\n");
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goto exit;
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}
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if ((ret = mbedtls_sha256(buf, (int) (p - 2 - buf), hash, 0)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_sha256 returned %d\n\n", ret);
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goto exit;
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}
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if ((ret = mbedtls_rsa_pkcs1_verify(&rsa, MBEDTLS_MD_SHA256,
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mdlen, hash, p)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_rsa_pkcs1_verify returned %d\n\n", ret);
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goto exit;
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}
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/*
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* 6. Send our public value: Yc = G ^ Xc mod P
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*/
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mbedtls_printf("\n . Sending own public value to server");
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fflush(stdout);
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n = mbedtls_dhm_get_len(&dhm);
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if ((ret = mbedtls_dhm_make_public(&dhm, (int) n, buf, n,
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mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_dhm_make_public returned %d\n\n", ret);
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goto exit;
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}
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if ((ret = mbedtls_net_send(&server_fd, buf, n)) != (int) n) {
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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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* 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 decryption 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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* IVs and MACs.
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*/
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mbedtls_printf("...\n . Receiving and decrypting the ciphertext");
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fflush(stdout);
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ret = mbedtls_aes_setkey_dec(&aes, buf, 256);
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if (ret != 0) {
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goto exit;
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}
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memset(buf, 0, sizeof(buf));
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if ((ret = mbedtls_net_recv(&server_fd, buf, 16)) != 16) {
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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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ret = mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_DECRYPT, buf, buf);
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if (ret != 0) {
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goto exit;
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}
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buf[16] = '\0';
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mbedtls_printf("\n . Plaintext is \"%s\"\n\n", (char *) buf);
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_net_free(&server_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_mpi_free(&N);
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mbedtls_mpi_free(&E);
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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 && PSA_WANT_ALG_SHA_256 &&
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MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
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@ -1,306 +0,0 @@
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/*
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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 OR GPL-2.0-or-later
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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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/* md.h is included this early since MD_CAN_XXX macros are defined there. */
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#include "mbedtls/md.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_SHA256_C) && \
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defined(MBEDTLS_FS_IO) && defined(MBEDTLS_CTR_DRBG_C)
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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/sha256.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_SHA256_C) || \
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!defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_CTR_DRBG_C)
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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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"PSA_WANT_ALG_SHA_256 and/or MBEDTLS_FS_IO and/or "
|
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"MBEDTLS_CTR_DRBG_C and/or MBEDTLS_SHA1_C not defined.\n");
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mbedtls_exit(0);
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}
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#else
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|
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|
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int main(void)
|
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{
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FILE *f;
|
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|
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
|
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unsigned int mdlen;
|
||||
size_t n, buflen;
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mbedtls_net_context listen_fd, client_fd;
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|
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unsigned char buf[2048];
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unsigned char hash[MBEDTLS_MD_MAX_SIZE];
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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;
|
||||
mbedtls_ctr_drbg_context ctr_drbg;
|
||||
mbedtls_rsa_context rsa;
|
||||
mbedtls_dhm_context dhm;
|
||||
mbedtls_aes_context aes;
|
||||
|
||||
mbedtls_mpi N, P, Q, D, E, dhm_P, dhm_G;
|
||||
|
||||
mbedtls_net_init(&listen_fd);
|
||||
mbedtls_net_init(&client_fd);
|
||||
mbedtls_dhm_init(&dhm);
|
||||
mbedtls_aes_init(&aes);
|
||||
mbedtls_ctr_drbg_init(&ctr_drbg);
|
||||
|
||||
mbedtls_mpi_init(&N); mbedtls_mpi_init(&P); mbedtls_mpi_init(&Q);
|
||||
mbedtls_mpi_init(&D); mbedtls_mpi_init(&E); mbedtls_mpi_init(&dhm_P);
|
||||
mbedtls_mpi_init(&dhm_G);
|
||||
/*
|
||||
* 1. Setup the RNG
|
||||
*/
|
||||
mbedtls_printf("\n . Seeding the random number generator");
|
||||
fflush(stdout);
|
||||
|
||||
mbedtls_entropy_init(&entropy);
|
||||
if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
|
||||
(const unsigned char *) pers,
|
||||
strlen(pers))) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 2a. Read the server's private RSA key
|
||||
*/
|
||||
mbedtls_printf("\n . Reading private key from rsa_priv.txt");
|
||||
fflush(stdout);
|
||||
|
||||
if ((f = fopen("rsa_priv.txt", "rb")) == NULL) {
|
||||
mbedtls_printf(" failed\n ! Could not open rsa_priv.txt\n" \
|
||||
" ! Please run rsa_genkey first\n\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
mbedtls_rsa_init(&rsa);
|
||||
|
||||
if ((ret = mbedtls_mpi_read_file(&N, 16, f)) != 0 ||
|
||||
(ret = mbedtls_mpi_read_file(&E, 16, f)) != 0 ||
|
||||
(ret = mbedtls_mpi_read_file(&D, 16, f)) != 0 ||
|
||||
(ret = mbedtls_mpi_read_file(&P, 16, f)) != 0 ||
|
||||
(ret = mbedtls_mpi_read_file(&Q, 16, f)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_mpi_read_file returned %d\n\n",
|
||||
ret);
|
||||
fclose(f);
|
||||
goto exit;
|
||||
}
|
||||
fclose(f);
|
||||
|
||||
if ((ret = mbedtls_rsa_import(&rsa, &N, &P, &Q, &D, &E)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_rsa_import returned %d\n\n",
|
||||
ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_rsa_complete(&rsa)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_rsa_complete returned %d\n\n",
|
||||
ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 2b. Get the DHM modulus and generator
|
||||
*/
|
||||
mbedtls_printf("\n . Reading DH parameters from dh_prime.txt");
|
||||
fflush(stdout);
|
||||
|
||||
if ((f = fopen("dh_prime.txt", "rb")) == NULL) {
|
||||
mbedtls_printf(" failed\n ! Could not open dh_prime.txt\n" \
|
||||
" ! Please run dh_genprime first\n\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_mpi_read_file(&dhm_P, 16, f)) != 0 ||
|
||||
(ret = mbedtls_mpi_read_file(&dhm_G, 16, f)) != 0 ||
|
||||
(ret = mbedtls_dhm_set_group(&dhm, &dhm_P, &dhm_G) != 0)) {
|
||||
mbedtls_printf(" failed\n ! Invalid DH parameter file\n\n");
|
||||
fclose(f);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
fclose(f);
|
||||
|
||||
/*
|
||||
* 3. Wait for a client to connect
|
||||
*/
|
||||
mbedtls_printf("\n . Waiting for a remote connection");
|
||||
fflush(stdout);
|
||||
|
||||
if ((ret = mbedtls_net_bind(&listen_fd, NULL, SERVER_PORT, MBEDTLS_NET_PROTO_TCP)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
|
||||
NULL, 0, NULL)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_net_accept returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 4. Setup the DH parameters (P,G,Ys)
|
||||
*/
|
||||
mbedtls_printf("\n . Sending the server's DH parameters");
|
||||
fflush(stdout);
|
||||
|
||||
memset(buf, 0, sizeof(buf));
|
||||
|
||||
if ((ret =
|
||||
mbedtls_dhm_make_params(&dhm, (int) mbedtls_dhm_get_len(&dhm), buf, &n,
|
||||
mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_dhm_make_params returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 5. Sign the parameters and send them
|
||||
*/
|
||||
|
||||
mdlen = (unsigned int) mbedtls_md_get_size(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256));
|
||||
if (mdlen == 0) {
|
||||
mbedtls_printf(" failed\n ! Invalid digest type\n\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_sha256(buf, n, hash, 0)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_sha256 returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
const size_t rsa_key_len = mbedtls_rsa_get_len(&rsa);
|
||||
buf[n] = (unsigned char) (rsa_key_len >> 8);
|
||||
buf[n + 1] = (unsigned char) (rsa_key_len);
|
||||
|
||||
if ((ret = mbedtls_rsa_pkcs1_sign(&rsa, mbedtls_ctr_drbg_random, &ctr_drbg,
|
||||
MBEDTLS_MD_SHA256, mdlen,
|
||||
hash, buf + n + 2)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_rsa_pkcs1_sign returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
buflen = n + 2 + rsa_key_len;
|
||||
buf2[0] = (unsigned char) (buflen >> 8);
|
||||
buf2[1] = (unsigned char) (buflen);
|
||||
|
||||
if ((ret = mbedtls_net_send(&client_fd, buf2, 2)) != 2 ||
|
||||
(ret = mbedtls_net_send(&client_fd, buf, buflen)) != (int) buflen) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_net_send returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 6. Get the client's public value: Yc = G ^ Xc mod P
|
||||
*/
|
||||
mbedtls_printf("\n . Receiving the client's public value");
|
||||
fflush(stdout);
|
||||
|
||||
memset(buf, 0, sizeof(buf));
|
||||
|
||||
n = mbedtls_dhm_get_len(&dhm);
|
||||
if ((ret = mbedtls_net_recv(&client_fd, buf, n)) != (int) n) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_net_recv returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_dhm_read_public(&dhm, buf, n)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_dhm_read_public returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* 7. Derive the shared secret: K = Ys ^ Xc mod P
|
||||
*/
|
||||
mbedtls_printf("\n . Shared secret: ");
|
||||
fflush(stdout);
|
||||
|
||||
if ((ret = mbedtls_dhm_calc_secret(&dhm, buf, sizeof(buf), &n,
|
||||
mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_dhm_calc_secret returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
for (n = 0; n < 16; n++) {
|
||||
mbedtls_printf("%02x", buf[n]);
|
||||
}
|
||||
|
||||
/*
|
||||
* 8. Setup the AES-256 encryption key
|
||||
*
|
||||
* This is an overly simplified example; best practice is
|
||||
* to hash the shared secret with a random value to derive
|
||||
* the keying material for the encryption/decryption keys
|
||||
* and MACs.
|
||||
*/
|
||||
mbedtls_printf("...\n . Encrypting and sending the ciphertext");
|
||||
fflush(stdout);
|
||||
|
||||
ret = mbedtls_aes_setkey_enc(&aes, buf, 256);
|
||||
if (ret != 0) {
|
||||
goto exit;
|
||||
}
|
||||
memcpy(buf, PLAINTEXT, 16);
|
||||
ret = mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_ENCRYPT, buf, buf);
|
||||
if (ret != 0) {
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if ((ret = mbedtls_net_send(&client_fd, buf, 16)) != 16) {
|
||||
mbedtls_printf(" failed\n ! mbedtls_net_send returned %d\n\n", ret);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
mbedtls_printf("\n\n");
|
||||
|
||||
exit_code = MBEDTLS_EXIT_SUCCESS;
|
||||
|
||||
exit:
|
||||
|
||||
mbedtls_mpi_free(&N); mbedtls_mpi_free(&P); mbedtls_mpi_free(&Q);
|
||||
mbedtls_mpi_free(&D); mbedtls_mpi_free(&E); mbedtls_mpi_free(&dhm_P);
|
||||
mbedtls_mpi_free(&dhm_G);
|
||||
|
||||
mbedtls_net_free(&client_fd);
|
||||
mbedtls_net_free(&listen_fd);
|
||||
|
||||
mbedtls_aes_free(&aes);
|
||||
mbedtls_rsa_free(&rsa);
|
||||
mbedtls_dhm_free(&dhm);
|
||||
mbedtls_ctr_drbg_free(&ctr_drbg);
|
||||
mbedtls_entropy_free(&entropy);
|
||||
|
||||
mbedtls_exit(exit_code);
|
||||
}
|
||||
#endif /* MBEDTLS_AES_C && MBEDTLS_DHM_C && MBEDTLS_ENTROPY_C &&
|
||||
MBEDTLS_NET_C && MBEDTLS_RSA_C && PSA_WANT_ALG_SHA_256 &&
|
||||
MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
|
||||
Loading…
x
Reference in New Issue
Block a user