diff options
Diffstat (limited to 'programs/ssl/ssl_fork_server.c')
| -rw-r--r-- | programs/ssl/ssl_fork_server.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/programs/ssl/ssl_fork_server.c b/programs/ssl/ssl_fork_server.c new file mode 100644 index 00000000000..f4822b7e688 --- /dev/null +++ b/programs/ssl/ssl_fork_server.c @@ -0,0 +1,381 @@ +/* + * SSL server demonstration program using fork() for handling multiple clients + * + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + */ + +#include "mbedtls/build_info.h" + +#include "mbedtls/platform.h" + +#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \ + !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_SRV_C) || \ + !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \ + !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \ + !defined(MBEDTLS_TIMING_C) || !defined(MBEDTLS_FS_IO) || \ + !defined(MBEDTLS_PEM_PARSE_C) +int main(int argc, char *argv[]) +{ + ((void) argc); + ((void) argv); + + mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C " + "and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or " + "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or " + "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C and/or " + "MBEDTLS_TIMING_C and/or MBEDTLS_PEM_PARSE_C not defined.\n"); + mbedtls_exit(0); +} +#elif defined(_WIN32) +int main(void) +{ + mbedtls_printf("_WIN32 defined. This application requires fork() and signals " + "to work correctly.\n"); + mbedtls_exit(0); +} +#else + +#include "mbedtls/entropy.h" +#include "mbedtls/ctr_drbg.h" +#include "test/certs.h" +#include "mbedtls/x509.h" +#include "mbedtls/ssl.h" +#include "mbedtls/net_sockets.h" +#include "mbedtls/timing.h" + +#include <string.h> +#include <signal.h> + +#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32) +#include <unistd.h> +#endif + +#define HTTP_RESPONSE \ + "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \ + "<h2>Mbed TLS Test Server</h2>\r\n" \ + "<p>Successful connection using: %s</p>\r\n" + +#define DEBUG_LEVEL 0 + + +static void my_debug(void *ctx, int level, + const char *file, int line, + const char *str) +{ + ((void) level); + + mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str); + fflush((FILE *) ctx); +} + +int main(void) +{ + int ret = 1, len, cnt = 0, pid; + int exit_code = MBEDTLS_EXIT_FAILURE; + mbedtls_net_context listen_fd, client_fd; + unsigned char buf[1024]; + const char *pers = "ssl_fork_server"; + + mbedtls_entropy_context entropy; + mbedtls_ctr_drbg_context ctr_drbg; + mbedtls_ssl_context ssl; + mbedtls_ssl_config conf; + mbedtls_x509_crt srvcert; + mbedtls_pk_context pkey; + + mbedtls_net_init(&listen_fd); + mbedtls_net_init(&client_fd); + mbedtls_ssl_init(&ssl); + mbedtls_ssl_config_init(&conf); + mbedtls_entropy_init(&entropy); + mbedtls_pk_init(&pkey); + mbedtls_x509_crt_init(&srvcert); + mbedtls_ctr_drbg_init(&ctr_drbg); + +#if defined(MBEDTLS_USE_PSA_CRYPTO) + psa_status_t status = psa_crypto_init(); + if (status != PSA_SUCCESS) { + mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n", + (int) status); + goto exit; + } +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + + signal(SIGCHLD, SIG_IGN); + + /* + * 0. Initial seeding of the RNG + */ + mbedtls_printf("\n . Initial seeding of the random generator..."); + fflush(stdout); + + if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, + (const unsigned char *) pers, + strlen(pers))) != 0) { + mbedtls_printf(" failed! mbedtls_ctr_drbg_seed returned %d\n\n", ret); + goto exit; + } + + mbedtls_printf(" ok\n"); + + /* + * 1. Load the certificates and private RSA key + */ + mbedtls_printf(" . Loading the server cert. and key..."); + fflush(stdout); + + /* + * This demonstration program uses embedded test certificates. + * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the + * server and CA certificates, as well as mbedtls_pk_parse_keyfile(). + */ + ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt, + mbedtls_test_srv_crt_len); + if (ret != 0) { + mbedtls_printf(" failed! mbedtls_x509_crt_parse returned %d\n\n", ret); + goto exit; + } + + ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem, + mbedtls_test_cas_pem_len); + if (ret != 0) { + mbedtls_printf(" failed! mbedtls_x509_crt_parse returned %d\n\n", ret); + goto exit; + } + + ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key, + mbedtls_test_srv_key_len, NULL, 0, + mbedtls_ctr_drbg_random, &ctr_drbg); + if (ret != 0) { + mbedtls_printf(" failed! mbedtls_pk_parse_key returned %d\n\n", ret); + goto exit; + } + + mbedtls_printf(" ok\n"); + + /* + * 1b. Prepare SSL configuration + */ + mbedtls_printf(" . Configuring SSL..."); + fflush(stdout); + + if ((ret = mbedtls_ssl_config_defaults(&conf, + MBEDTLS_SSL_IS_SERVER, + MBEDTLS_SSL_TRANSPORT_STREAM, + MBEDTLS_SSL_PRESET_DEFAULT)) != 0) { + mbedtls_printf(" failed! mbedtls_ssl_config_defaults returned %d\n\n", ret); + goto exit; + } + + mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg); + mbedtls_ssl_conf_dbg(&conf, my_debug, stdout); + + mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL); + if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) { + mbedtls_printf(" failed! mbedtls_ssl_conf_own_cert returned %d\n\n", ret); + goto exit; + } + + mbedtls_printf(" ok\n"); + + /* + * 2. Setup the listening TCP socket + */ + mbedtls_printf(" . Bind on https://localhost:4433/ ..."); + fflush(stdout); + + if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) { + mbedtls_printf(" failed! mbedtls_net_bind returned %d\n\n", ret); + goto exit; + } + + mbedtls_printf(" ok\n"); + + while (1) { + /* + * 3. Wait until a client connects + */ + mbedtls_net_init(&client_fd); + mbedtls_ssl_init(&ssl); + + mbedtls_printf(" . Waiting for a remote connection ...\n"); + fflush(stdout); + + if ((ret = mbedtls_net_accept(&listen_fd, &client_fd, + NULL, 0, NULL)) != 0) { + mbedtls_printf(" failed! mbedtls_net_accept returned %d\n\n", ret); + goto exit; + } + + /* + * 3.5. Forking server thread + */ + + mbedtls_printf(" . Forking to handle connection ..."); + fflush(stdout); + + pid = fork(); + + if (pid < 0) { + mbedtls_printf(" failed! fork returned %d\n\n", pid); + goto exit; + } + + if (pid != 0) { + mbedtls_printf(" ok\n"); + mbedtls_net_close(&client_fd); + + if ((ret = mbedtls_ctr_drbg_reseed(&ctr_drbg, + (const unsigned char *) "parent", + 6)) != 0) { + mbedtls_printf(" failed! mbedtls_ctr_drbg_reseed returned %d\n\n", ret); + goto exit; + } + + continue; + } + + mbedtls_net_close(&listen_fd); + + pid = getpid(); + + /* + * 4. Setup stuff + */ + mbedtls_printf("pid %d: Setting up the SSL data.\n", pid); + fflush(stdout); + + if ((ret = mbedtls_ctr_drbg_reseed(&ctr_drbg, + (const unsigned char *) "child", + 5)) != 0) { + mbedtls_printf( + "pid %d: SSL setup failed! mbedtls_ctr_drbg_reseed returned %d\n\n", + pid, ret); + goto exit; + } + + if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) { + mbedtls_printf( + "pid %d: SSL setup failed! mbedtls_ssl_setup returned %d\n\n", + pid, ret); + goto exit; + } + + mbedtls_ssl_set_bio(&ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL); + + mbedtls_printf("pid %d: SSL setup ok\n", pid); + + /* + * 5. Handshake + */ + mbedtls_printf("pid %d: Performing the SSL/TLS handshake.\n", pid); + fflush(stdout); + + while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) { + if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { + mbedtls_printf( + "pid %d: SSL handshake failed! mbedtls_ssl_handshake returned %d\n\n", + pid, ret); + goto exit; + } + } + + mbedtls_printf("pid %d: SSL handshake ok\n", pid); + + /* + * 6. Read the HTTP Request + */ + mbedtls_printf("pid %d: Start reading from client.\n", pid); + fflush(stdout); + + do { + len = sizeof(buf) - 1; + memset(buf, 0, sizeof(buf)); + ret = mbedtls_ssl_read(&ssl, buf, len); + + if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) { + continue; + } + + if (ret <= 0) { + switch (ret) { + case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY: + mbedtls_printf("pid %d: connection was closed gracefully\n", pid); + break; + + case MBEDTLS_ERR_NET_CONN_RESET: + mbedtls_printf("pid %d: connection was reset by peer\n", pid); + break; + + default: + mbedtls_printf("pid %d: mbedtls_ssl_read returned %d\n", pid, ret); + break; + } + + break; + } + + len = ret; + mbedtls_printf("pid %d: %d bytes read\n\n%s", pid, len, (char *) buf); + + if (ret > 0) { + break; + } + } while (1); + + /* + * 7. Write the 200 Response + */ + mbedtls_printf("pid %d: Start writing to client.\n", pid); + fflush(stdout); + + len = sprintf((char *) buf, HTTP_RESPONSE, + mbedtls_ssl_get_ciphersuite(&ssl)); + + while (cnt++ < 100) { + while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) { + if (ret == MBEDTLS_ERR_NET_CONN_RESET) { + mbedtls_printf( + "pid %d: Write failed! peer closed the connection\n\n", pid); + goto exit; + } + + if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { + mbedtls_printf( + "pid %d: Write failed! mbedtls_ssl_write returned %d\n\n", + pid, ret); + goto exit; + } + } + len = ret; + mbedtls_printf("pid %d: %d bytes written\n\n%s\n", pid, len, (char *) buf); + + mbedtls_net_usleep(1000000); + } + + mbedtls_ssl_close_notify(&ssl); + goto exit; + } + + exit_code = MBEDTLS_EXIT_SUCCESS; + +exit: + mbedtls_net_free(&client_fd); + mbedtls_net_free(&listen_fd); + mbedtls_x509_crt_free(&srvcert); + mbedtls_pk_free(&pkey); + mbedtls_ssl_free(&ssl); + mbedtls_ssl_config_free(&conf); + mbedtls_ctr_drbg_free(&ctr_drbg); + mbedtls_entropy_free(&entropy); +#if defined(MBEDTLS_USE_PSA_CRYPTO) + mbedtls_psa_crypto_free(); +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + + mbedtls_exit(exit_code); +} +#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && + MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C && + MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_PEM_PARSE_C && + ! _WIN32 */ |