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Diffstat (limited to 'programs/ssl/ssl_mail_client.c')
-rw-r--r--programs/ssl/ssl_mail_client.c804
1 files changed, 804 insertions, 0 deletions
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
new file mode 100644
index 00000000000..febb881c804
--- /dev/null
+++ b/programs/ssl/ssl_mail_client.c
@@ -0,0 +1,804 @@
+/*
+ * 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 = sprintf((char *) buf, "MAIL FROM:<%s>\r\n", opt.mail_from);
+ 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 = sprintf((char *) buf, "RCPT TO:<%s>\r\n", opt.mail_to);
+ 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 = sprintf((char *) 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);
+ 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 */
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-21 05:46:29 +0000