diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/programs/pkey/dh_server.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/programs/pkey/dh_server.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/programs/pkey/dh_server.c b/lib/mbedtls-2.27.0/programs/pkey/dh_server.c new file mode 100644 index 0000000..dccf095 --- /dev/null +++ b/lib/mbedtls-2.27.0/programs/pkey/dh_server.c @@ -0,0 +1,335 @@ +/* + * Diffie-Hellman-Merkle key exchange (server side) + * + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#if defined(MBEDTLS_PLATFORM_C) +#include "mbedtls/platform.h" +#else +#include <stdio.h> +#include <stdlib.h> +#define mbedtls_printf printf +#define mbedtls_time_t time_t +#define mbedtls_exit exit +#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS +#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE +#endif /* MBEDTLS_PLATFORM_C */ + +#if defined(MBEDTLS_AES_C) && defined(MBEDTLS_DHM_C) && \ + defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_NET_C) && \ + defined(MBEDTLS_RSA_C) && defined(MBEDTLS_SHA256_C) && \ + defined(MBEDTLS_FS_IO) && defined(MBEDTLS_CTR_DRBG_C) && \ + defined(MBEDTLS_SHA1_C) +#include "mbedtls/net_sockets.h" +#include "mbedtls/aes.h" +#include "mbedtls/dhm.h" +#include "mbedtls/rsa.h" +#include "mbedtls/sha1.h" +#include "mbedtls/entropy.h" +#include "mbedtls/ctr_drbg.h" + +#include <stdio.h> +#include <string.h> +#endif + +#define SERVER_PORT "11999" +#define PLAINTEXT "==Hello there!==" + +#if !defined(MBEDTLS_AES_C) || !defined(MBEDTLS_DHM_C) || \ + !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_NET_C) || \ + !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) || \ + !defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_CTR_DRBG_C) || \ + !defined(MBEDTLS_SHA1_C) +int main( void ) +{ + mbedtls_printf("MBEDTLS_AES_C and/or MBEDTLS_DHM_C and/or MBEDTLS_ENTROPY_C " + "and/or MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or " + "MBEDTLS_SHA256_C and/or MBEDTLS_FS_IO and/or " + "MBEDTLS_CTR_DRBG_C not defined.\n"); + mbedtls_exit( 0 ); +} +#else + + +int main( void ) +{ + FILE *f; + + int ret = 1; + int exit_code = MBEDTLS_EXIT_FAILURE; + size_t n, buflen; + mbedtls_net_context listen_fd, client_fd; + + unsigned char buf[2048]; + unsigned char hash[32]; + unsigned char buf2[2]; + const char *pers = "dh_server"; + + 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; + + mbedtls_net_init( &listen_fd ); + mbedtls_net_init( &client_fd ); + mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_SHA256 ); + 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 ); + + /* + * 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, MBEDTLS_RSA_PKCS_V15, 0 ); + + 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( mbedtls_mpi_read_file( &dhm.P, 16, f ) != 0 || + mbedtls_mpi_read_file( &dhm.G, 16, f ) != 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_mpi_size( &dhm.P ), 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 + */ + if( ( ret = mbedtls_sha1_ret( buf, n, hash ) ) != 0 ) + { + mbedtls_printf( " failed\n ! mbedtls_sha1_ret returned %d\n\n", ret ); + goto exit; + } + + buf[n ] = (unsigned char)( rsa.len >> 8 ); + buf[n + 1] = (unsigned char)( rsa.len ); + + if( ( ret = mbedtls_rsa_pkcs1_sign( &rsa, NULL, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA256, + 0, hash, buf + n + 2 ) ) != 0 ) + { + mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_sign returned %d\n\n", ret ); + goto exit; + } + + buflen = n + 2 + rsa.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 = dhm.len; + 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, dhm.len ) ) != 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 ); + + mbedtls_aes_setkey_enc( &aes, buf, 256 ); + memcpy( buf, PLAINTEXT, 16 ); + mbedtls_aes_crypt_ecb( &aes, MBEDTLS_AES_ENCRYPT, buf, buf ); + + 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_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 ); + +#if defined(_WIN32) + mbedtls_printf( " + Press Enter to exit this program.\n" ); + fflush( stdout ); getchar(); +#endif + + mbedtls_exit( exit_code ); +} +#endif /* MBEDTLS_AES_C && MBEDTLS_DHM_C && MBEDTLS_ENTROPY_C && + MBEDTLS_NET_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C && + MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */ |