| /* |
| * SSL client for SMTP servers |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| */ |
| |
| /* Enable definition of gethostname() even when compiling with -std=c99. Must |
| * be set before mbedtls_config.h, which pulls in glibc's features.h indirectly. |
| * Harmless on other platforms. */ |
| |
| #define _POSIX_C_SOURCE 200112L |
| #define _XOPEN_SOURCE 600 |
| |
| #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_CLI_C) || \ |
| !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \ |
| !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \ |
| !defined(MBEDTLS_FS_IO) |
| int main(void) |
| { |
| mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or " |
| "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or " |
| "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or " |
| "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C " |
| "not defined.\n"); |
| mbedtls_exit(0); |
| } |
| #else |
| |
| #include "mbedtls/base64.h" |
| #include "mbedtls/error.h" |
| #include "mbedtls/net_sockets.h" |
| #include "mbedtls/ssl.h" |
| #include "mbedtls/entropy.h" |
| #include "mbedtls/ctr_drbg.h" |
| #include "test/certs.h" |
| #include "mbedtls/x509.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32) |
| #include <unistd.h> |
| #else |
| #include <io.h> |
| #endif |
| |
| #if defined(_WIN32) || defined(_WIN32_WCE) |
| #include <winsock2.h> |
| #include <windows.h> |
| |
| #if defined(_MSC_VER) |
| #if defined(_WIN32_WCE) |
| #pragma comment( lib, "ws2.lib" ) |
| #else |
| #pragma comment( lib, "ws2_32.lib" ) |
| #endif |
| #endif /* _MSC_VER */ |
| #endif |
| |
| #define DFL_SERVER_NAME "localhost" |
| #define DFL_SERVER_PORT "465" |
| #define DFL_USER_NAME "user" |
| #define DFL_USER_PWD "password" |
| #define DFL_MAIL_FROM "" |
| #define DFL_MAIL_TO "" |
| #define DFL_DEBUG_LEVEL 0 |
| #define DFL_CA_FILE "" |
| #define DFL_CRT_FILE "" |
| #define DFL_KEY_FILE "" |
| #define DFL_FORCE_CIPHER 0 |
| #define DFL_MODE 0 |
| #define DFL_AUTHENTICATION 0 |
| |
| #define MODE_SSL_TLS 0 |
| #define MODE_STARTTLS 0 |
| |
| #if defined(MBEDTLS_BASE64_C) |
| #define USAGE_AUTH \ |
| " authentication=%%d default: 0 (disabled)\n" \ |
| " user_name=%%s default: \"" DFL_USER_NAME "\"\n" \ |
| " user_pwd=%%s default: \"" \ |
| DFL_USER_PWD "\"\n" |
| #else |
| #define USAGE_AUTH \ |
| " authentication options disabled. (Require MBEDTLS_BASE64_C)\n" |
| #endif /* MBEDTLS_BASE64_C */ |
| |
| #if defined(MBEDTLS_FS_IO) |
| #define USAGE_IO \ |
| " ca_file=%%s default: \"\" (pre-loaded)\n" \ |
| " crt_file=%%s default: \"\" (pre-loaded)\n" \ |
| " key_file=%%s default: \"\" (pre-loaded)\n" |
| #else |
| #define USAGE_IO \ |
| " No file operations available (MBEDTLS_FS_IO not defined)\n" |
| #endif /* MBEDTLS_FS_IO */ |
| |
| #define USAGE \ |
| "\n usage: ssl_mail_client param=<>...\n" \ |
| "\n acceptable parameters:\n" \ |
| " server_name=%%s default: " DFL_SERVER_NAME "\n" \ |
| " server_port=%%d default: " \ |
| DFL_SERVER_PORT "\n" \ |
| " debug_level=%%d default: 0 (disabled)\n" \ |
| " mode=%%d default: 0 (SSL/TLS) (1 for STARTTLS)\n" \ |
| USAGE_AUTH \ |
| " mail_from=%%s default: \"\"\n" \ |
| " mail_to=%%s default: \"\"\n" \ |
| USAGE_IO \ |
| " force_ciphersuite=<name> default: all enabled\n" \ |
| " acceptable ciphersuite names:\n" |
| |
| |
| /* |
| * global options |
| */ |
| struct options { |
| const char *server_name; /* hostname of the server (client only) */ |
| const char *server_port; /* port on which the ssl service runs */ |
| int debug_level; /* level of debugging */ |
| int authentication; /* if authentication is required */ |
| int mode; /* SSL/TLS (0) or STARTTLS (1) */ |
| const char *user_name; /* username to use for authentication */ |
| const char *user_pwd; /* password to use for authentication */ |
| const char *mail_from; /* E-Mail address to use as sender */ |
| const char *mail_to; /* E-Mail address to use as recipient */ |
| const char *ca_file; /* the file with the CA certificate(s) */ |
| const char *crt_file; /* the file with the client certificate */ |
| const char *key_file; /* the file with the client key */ |
| int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */ |
| } opt; |
| |
| 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); |
| } |
| |
| static int do_handshake(mbedtls_ssl_context *ssl) |
| { |
| int ret; |
| uint32_t flags; |
| unsigned char buf[1024]; |
| memset(buf, 0, 1024); |
| |
| /* |
| * 4. Handshake |
| */ |
| mbedtls_printf(" . Performing the SSL/TLS handshake..."); |
| fflush(stdout); |
| |
| while ((ret = mbedtls_ssl_handshake(ssl)) != 0) { |
| if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { |
| #if defined(MBEDTLS_ERROR_C) |
| mbedtls_strerror(ret, (char *) buf, 1024); |
| #endif |
| mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned %d: %s\n\n", ret, buf); |
| return -1; |
| } |
| } |
| |
| mbedtls_printf(" ok\n [ Ciphersuite is %s ]\n", |
| mbedtls_ssl_get_ciphersuite(ssl)); |
| |
| /* |
| * 5. Verify the server certificate |
| */ |
| mbedtls_printf(" . Verifying peer X.509 certificate..."); |
| |
| /* In real life, we probably want to bail out when ret != 0 */ |
| if ((flags = mbedtls_ssl_get_verify_result(ssl)) != 0) { |
| #if !defined(MBEDTLS_X509_REMOVE_INFO) |
| char vrfy_buf[512]; |
| #endif |
| |
| mbedtls_printf(" failed\n"); |
| |
| #if !defined(MBEDTLS_X509_REMOVE_INFO) |
| mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), " ! ", flags); |
| |
| mbedtls_printf("%s\n", vrfy_buf); |
| #endif |
| } else { |
| mbedtls_printf(" ok\n"); |
| } |
| |
| #if !defined(MBEDTLS_X509_REMOVE_INFO) |
| mbedtls_printf(" . Peer certificate information ...\n"); |
| mbedtls_x509_crt_info((char *) buf, sizeof(buf) - 1, " ", |
| mbedtls_ssl_get_peer_cert(ssl)); |
| mbedtls_printf("%s\n", buf); |
| #endif |
| |
| return 0; |
| } |
| |
| static int write_ssl_data(mbedtls_ssl_context *ssl, unsigned char *buf, size_t len) |
| { |
| int ret; |
| |
| mbedtls_printf("\n%s", buf); |
| while (len && (ret = mbedtls_ssl_write(ssl, buf, len)) <= 0) { |
| if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret); |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int write_ssl_and_get_response(mbedtls_ssl_context *ssl, unsigned char *buf, size_t len) |
| { |
| int ret; |
| unsigned char data[128]; |
| char code[4]; |
| size_t i, idx = 0; |
| |
| mbedtls_printf("\n%s", buf); |
| while (len && (ret = mbedtls_ssl_write(ssl, buf, len)) <= 0) { |
| if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret); |
| return -1; |
| } |
| } |
| |
| do { |
| len = sizeof(data) - 1; |
| memset(data, 0, sizeof(data)); |
| ret = mbedtls_ssl_read(ssl, data, len); |
| |
| if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) { |
| continue; |
| } |
| |
| if (ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) { |
| return -1; |
| } |
| |
| if (ret <= 0) { |
| mbedtls_printf("failed\n ! mbedtls_ssl_read returned %d\n\n", ret); |
| return -1; |
| } |
| |
| mbedtls_printf("\n%s", data); |
| len = ret; |
| for (i = 0; i < len; i++) { |
| if (data[i] != '\n') { |
| if (idx < 4) { |
| code[idx++] = data[i]; |
| } |
| continue; |
| } |
| |
| if (idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ') { |
| code[3] = '\0'; |
| return atoi(code); |
| } |
| |
| idx = 0; |
| } |
| } while (1); |
| } |
| |
| static int write_and_get_response(mbedtls_net_context *sock_fd, unsigned char *buf, size_t len) |
| { |
| int ret; |
| unsigned char data[128]; |
| char code[4]; |
| size_t i, idx = 0; |
| |
| mbedtls_printf("\n%s", buf); |
| if (len && (ret = mbedtls_net_send(sock_fd, buf, len)) <= 0) { |
| mbedtls_printf(" failed\n ! mbedtls_net_send returned %d\n\n", ret); |
| return -1; |
| } |
| |
| do { |
| len = sizeof(data) - 1; |
| memset(data, 0, sizeof(data)); |
| ret = mbedtls_net_recv(sock_fd, data, len); |
| |
| if (ret <= 0) { |
| mbedtls_printf("failed\n ! mbedtls_net_recv returned %d\n\n", ret); |
| return -1; |
| } |
| |
| data[len] = '\0'; |
| mbedtls_printf("\n%s", data); |
| len = ret; |
| for (i = 0; i < len; i++) { |
| if (data[i] != '\n') { |
| if (idx < 4) { |
| code[idx++] = data[i]; |
| } |
| continue; |
| } |
| |
| if (idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ') { |
| code[3] = '\0'; |
| return atoi(code); |
| } |
| |
| idx = 0; |
| } |
| } while (1); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int ret = 1, len; |
| int exit_code = MBEDTLS_EXIT_FAILURE; |
| mbedtls_net_context server_fd; |
| #if defined(MBEDTLS_BASE64_C) |
| unsigned char base[1024]; |
| /* buf is used as the destination buffer for printing base with the format: |
| * "%s\r\n". Hence, the size of buf should be at least the size of base |
| * plus 2 bytes for the \r and \n characters. |
| */ |
| unsigned char buf[sizeof(base) + 2]; |
| #else |
| unsigned char buf[1024]; |
| #endif |
| char hostname[32]; |
| const char *pers = "ssl_mail_client"; |
| |
| mbedtls_entropy_context entropy; |
| mbedtls_ctr_drbg_context ctr_drbg; |
| mbedtls_ssl_context ssl; |
| mbedtls_ssl_config conf; |
| mbedtls_x509_crt cacert; |
| mbedtls_x509_crt clicert; |
| mbedtls_pk_context pkey; |
| int i; |
| size_t n; |
| char *p, *q; |
| const int *list; |
| |
| /* |
| * Make sure memory references are valid in case we exit early. |
| */ |
| mbedtls_net_init(&server_fd); |
| mbedtls_ssl_init(&ssl); |
| mbedtls_ssl_config_init(&conf); |
| memset(&buf, 0, sizeof(buf)); |
| mbedtls_x509_crt_init(&cacert); |
| mbedtls_x509_crt_init(&clicert); |
| mbedtls_pk_init(&pkey); |
| mbedtls_ctr_drbg_init(&ctr_drbg); |
| mbedtls_entropy_init(&entropy); |
| |
| #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 */ |
| |
| if (argc < 2) { |
| usage: |
| mbedtls_printf(USAGE); |
| |
| list = mbedtls_ssl_list_ciphersuites(); |
| while (*list) { |
| mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name(*list)); |
| list++; |
| } |
| mbedtls_printf("\n"); |
| goto exit; |
| } |
| |
| opt.server_name = DFL_SERVER_NAME; |
| opt.server_port = DFL_SERVER_PORT; |
| opt.debug_level = DFL_DEBUG_LEVEL; |
| opt.authentication = DFL_AUTHENTICATION; |
| opt.mode = DFL_MODE; |
| opt.user_name = DFL_USER_NAME; |
| opt.user_pwd = DFL_USER_PWD; |
| opt.mail_from = DFL_MAIL_FROM; |
| opt.mail_to = DFL_MAIL_TO; |
| opt.ca_file = DFL_CA_FILE; |
| opt.crt_file = DFL_CRT_FILE; |
| opt.key_file = DFL_KEY_FILE; |
| opt.force_ciphersuite[0] = DFL_FORCE_CIPHER; |
| |
| for (i = 1; i < argc; i++) { |
| p = argv[i]; |
| if ((q = strchr(p, '=')) == NULL) { |
| goto usage; |
| } |
| *q++ = '\0'; |
| |
| if (strcmp(p, "server_name") == 0) { |
| opt.server_name = q; |
| } else if (strcmp(p, "server_port") == 0) { |
| opt.server_port = q; |
| } else if (strcmp(p, "debug_level") == 0) { |
| opt.debug_level = atoi(q); |
| if (opt.debug_level < 0 || opt.debug_level > 65535) { |
| goto usage; |
| } |
| } else if (strcmp(p, "authentication") == 0) { |
| opt.authentication = atoi(q); |
| if (opt.authentication < 0 || opt.authentication > 1) { |
| goto usage; |
| } |
| } else if (strcmp(p, "mode") == 0) { |
| opt.mode = atoi(q); |
| if (opt.mode < 0 || opt.mode > 1) { |
| goto usage; |
| } |
| } else if (strcmp(p, "user_name") == 0) { |
| opt.user_name = q; |
| } else if (strcmp(p, "user_pwd") == 0) { |
| opt.user_pwd = q; |
| } else if (strcmp(p, "mail_from") == 0) { |
| opt.mail_from = q; |
| } else if (strcmp(p, "mail_to") == 0) { |
| opt.mail_to = q; |
| } else if (strcmp(p, "ca_file") == 0) { |
| opt.ca_file = q; |
| } else if (strcmp(p, "crt_file") == 0) { |
| opt.crt_file = q; |
| } else if (strcmp(p, "key_file") == 0) { |
| opt.key_file = q; |
| } else if (strcmp(p, "force_ciphersuite") == 0) { |
| opt.force_ciphersuite[0] = -1; |
| |
| opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id(q); |
| |
| if (opt.force_ciphersuite[0] <= 0) { |
| goto usage; |
| } |
| |
| opt.force_ciphersuite[1] = 0; |
| } else { |
| goto usage; |
| } |
| } |
| |
| /* |
| * 0. Initialize the RNG and the session data |
| */ |
| mbedtls_printf("\n . Seeding the random number 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\n ! mbedtls_ctr_drbg_seed returned %d\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| /* |
| * 1.1. Load the trusted CA |
| */ |
| mbedtls_printf(" . Loading the CA root certificate ..."); |
| fflush(stdout); |
| |
| #if defined(MBEDTLS_FS_IO) |
| if (strlen(opt.ca_file)) { |
| ret = mbedtls_x509_crt_parse_file(&cacert, opt.ca_file); |
| } else |
| #endif |
| #if defined(MBEDTLS_PEM_PARSE_C) |
| ret = mbedtls_x509_crt_parse(&cacert, (const unsigned char *) mbedtls_test_cas_pem, |
| mbedtls_test_cas_pem_len); |
| #else |
| { |
| mbedtls_printf("MBEDTLS_PEM_PARSE_C not defined."); |
| goto exit; |
| } |
| #endif |
| if (ret < 0) { |
| mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok (%d skipped)\n", ret); |
| |
| /* |
| * 1.2. Load own certificate and private key |
| * |
| * (can be skipped if client authentication is not required) |
| */ |
| mbedtls_printf(" . Loading the client cert. and key..."); |
| fflush(stdout); |
| |
| #if defined(MBEDTLS_FS_IO) |
| if (strlen(opt.crt_file)) { |
| ret = mbedtls_x509_crt_parse_file(&clicert, opt.crt_file); |
| } else |
| #endif |
| ret = mbedtls_x509_crt_parse(&clicert, (const unsigned char *) mbedtls_test_cli_crt, |
| mbedtls_test_cli_crt_len); |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| #if defined(MBEDTLS_FS_IO) |
| if (strlen(opt.key_file)) { |
| ret = mbedtls_pk_parse_keyfile(&pkey, opt.key_file, "", |
| mbedtls_ctr_drbg_random, &ctr_drbg); |
| } else |
| #endif |
| #if defined(MBEDTLS_PEM_PARSE_C) |
| { |
| ret = mbedtls_pk_parse_key(&pkey, |
| (const unsigned char *) mbedtls_test_cli_key, |
| mbedtls_test_cli_key_len, |
| NULL, |
| 0, |
| mbedtls_ctr_drbg_random, |
| &ctr_drbg); |
| } |
| #else |
| { |
| mbedtls_printf("MBEDTLS_PEM_PARSE_C not defined."); |
| goto exit; |
| } |
| #endif |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| /* |
| * 2. Start the connection |
| */ |
| mbedtls_printf(" . Connecting to tcp/%s/%s...", opt.server_name, |
| opt.server_port); |
| fflush(stdout); |
| |
| if ((ret = mbedtls_net_connect(&server_fd, opt.server_name, |
| opt.server_port, MBEDTLS_NET_PROTO_TCP)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_net_connect returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| /* |
| * 3. Setup stuff |
| */ |
| mbedtls_printf(" . Setting up the SSL/TLS structure..."); |
| fflush(stdout); |
| |
| if ((ret = mbedtls_ssl_config_defaults(&conf, |
| MBEDTLS_SSL_IS_CLIENT, |
| MBEDTLS_SSL_TRANSPORT_STREAM, |
| MBEDTLS_SSL_PRESET_DEFAULT)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| /* OPTIONAL is not optimal for security, |
| * but makes interop easier in this simplified example */ |
| mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL); |
| |
| mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg); |
| mbedtls_ssl_conf_dbg(&conf, my_debug, stdout); |
| |
| if (opt.force_ciphersuite[0] != DFL_FORCE_CIPHER) { |
| mbedtls_ssl_conf_ciphersuites(&conf, opt.force_ciphersuite); |
| } |
| |
| mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL); |
| if ((ret = mbedtls_ssl_conf_own_cert(&conf, &clicert, &pkey)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_ssl_set_hostname(&ssl, opt.server_name)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL); |
| |
| mbedtls_printf(" ok\n"); |
| |
| if (opt.mode == MODE_SSL_TLS) { |
| if (do_handshake(&ssl) != 0) { |
| goto exit; |
| } |
| |
| mbedtls_printf(" > Get header from server:"); |
| fflush(stdout); |
| |
| ret = write_ssl_and_get_response(&ssl, buf, 0); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write EHLO to server:"); |
| fflush(stdout); |
| |
| gethostname(hostname, 32); |
| len = sprintf((char *) buf, "EHLO %s\r\n", hostname); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| } else { |
| mbedtls_printf(" > Get header from server:"); |
| fflush(stdout); |
| |
| ret = write_and_get_response(&server_fd, buf, 0); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write EHLO to server:"); |
| fflush(stdout); |
| |
| gethostname(hostname, 32); |
| len = sprintf((char *) buf, "EHLO %s\r\n", hostname); |
| ret = write_and_get_response(&server_fd, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write STARTTLS to server:"); |
| fflush(stdout); |
| |
| gethostname(hostname, 32); |
| len = sprintf((char *) buf, "STARTTLS\r\n"); |
| ret = write_and_get_response(&server_fd, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| if (do_handshake(&ssl) != 0) { |
| goto exit; |
| } |
| } |
| |
| #if defined(MBEDTLS_BASE64_C) |
| if (opt.authentication) { |
| mbedtls_printf(" > Write AUTH LOGIN to server:"); |
| fflush(stdout); |
| |
| len = sprintf((char *) buf, "AUTH LOGIN\r\n"); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 399) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write username to server: %s", opt.user_name); |
| fflush(stdout); |
| |
| ret = mbedtls_base64_encode(base, sizeof(base), &n, (const unsigned char *) opt.user_name, |
| strlen(opt.user_name)); |
| |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_base64_encode returned %d\n\n", ret); |
| goto exit; |
| } |
| len = sprintf((char *) buf, "%s\r\n", base); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 300 || ret > 399) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write password to server: %s", opt.user_pwd); |
| fflush(stdout); |
| |
| ret = mbedtls_base64_encode(base, sizeof(base), &n, (const unsigned char *) opt.user_pwd, |
| strlen(opt.user_pwd)); |
| |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_base64_encode returned %d\n\n", ret); |
| goto exit; |
| } |
| len = sprintf((char *) buf, "%s\r\n", base); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 399) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| } |
| #endif |
| |
| mbedtls_printf(" > Write MAIL FROM to server:"); |
| fflush(stdout); |
| |
| len = mbedtls_snprintf((char *) buf, sizeof(buf), "MAIL FROM:<%s>\r\n", opt.mail_from); |
| if (len < 0 || (size_t) len >= sizeof(buf)) { |
| mbedtls_printf(" failed\n ! mbedtls_snprintf encountered error or truncated output\n\n"); |
| goto exit; |
| } |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write RCPT TO to server:"); |
| fflush(stdout); |
| |
| len = mbedtls_snprintf((char *) buf, sizeof(buf), "RCPT TO:<%s>\r\n", opt.mail_to); |
| if (len < 0 || (size_t) len >= sizeof(buf)) { |
| mbedtls_printf(" failed\n ! mbedtls_snprintf encountered error or truncated output\n\n"); |
| goto exit; |
| } |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write DATA to server:"); |
| fflush(stdout); |
| |
| len = sprintf((char *) buf, "DATA\r\n"); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 300 || ret > 399) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_printf(" > Write content to server:"); |
| fflush(stdout); |
| |
| len = mbedtls_snprintf((char *) buf, sizeof(buf), |
| "From: %s\r\nSubject: Mbed TLS Test mail\r\n\r\n" |
| "This is a simple test mail from the " |
| "Mbed TLS mail client example.\r\n" |
| "\r\n" |
| "Enjoy!", opt.mail_from); |
| if (len < 0 || (size_t) len >= sizeof(buf)) { |
| mbedtls_printf(" failed\n ! mbedtls_snprintf encountered error or truncated output\n\n"); |
| goto exit; |
| } |
| ret = write_ssl_data(&ssl, buf, len); |
| |
| len = sprintf((char *) buf, "\r\n.\r\n"); |
| ret = write_ssl_and_get_response(&ssl, buf, len); |
| if (ret < 200 || ret > 299) { |
| mbedtls_printf(" failed\n ! server responded with %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| mbedtls_ssl_close_notify(&ssl); |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| |
| mbedtls_net_free(&server_fd); |
| mbedtls_x509_crt_free(&clicert); |
| mbedtls_x509_crt_free(&cacert); |
| 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_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C ** |
| MBEDTLS_CTR_DRBG_C */ |