flm01/openwrt/package/luci/libs/nixio/axTLS/samples/c/axssl.c

884 lines
25 KiB
C

/*
* Copyright (c) 2007, Cameron Rich
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the axTLS project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Demonstrate the use of the axTLS library in C with a set of
* command-line parameters similar to openssl. In fact, openssl clients
* should be able to communicate with axTLS servers and visa-versa.
*
* This code has various bits enabled depending on the configuration. To enable
* the most interesting version, compile with the 'full mode' enabled.
*
* To see what options you have, run the following:
* > axssl s_server -?
* > axssl s_client -?
*
* The axtls shared library must be in the same directory or be found
* by the OS.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "ssl.h"
/* define standard input */
#ifndef STDIN_FILENO
#define STDIN_FILENO 0
#endif
static void do_server(int argc, char *argv[]);
static void print_options(char *option);
static void print_server_options(char *option);
static void do_client(int argc, char *argv[]);
static void print_client_options(char *option);
static void display_cipher(SSL *ssl);
static void display_session_id(SSL *ssl);
/**
* Main entry point. Doesn't do much except works out whether we are a client
* or a server.
*/
int main(int argc, char *argv[])
{
#ifdef WIN32
WSADATA wsaData;
WORD wVersionRequested = MAKEWORD(2, 2);
WSAStartup(wVersionRequested, &wsaData);
#elif !defined(CONFIG_PLATFORM_SOLARIS)
signal(SIGPIPE, SIG_IGN); /* ignore pipe errors */
#endif
if (argc == 2 && strcmp(argv[1], "version") == 0)
{
printf("axssl %s %s\n", ssl_version(), __DATE__);
exit(0);
}
if (argc < 2 || (
strcmp(argv[1], "s_server") && strcmp(argv[1], "s_client")))
print_options(argc > 1 ? argv[1] : "");
strcmp(argv[1], "s_server") ?
do_client(argc, argv) : do_server(argc, argv);
return 0;
}
/**
* Implement the SSL server logic.
*/
static void do_server(int argc, char *argv[])
{
int i = 2;
uint16_t port = 4433;
uint32_t options = SSL_DISPLAY_CERTS;
int client_fd;
SSL_CTX *ssl_ctx;
int server_fd, res = 0;
socklen_t client_len;
#ifndef CONFIG_SSL_SKELETON_MODE
char *private_key_file = NULL;
const char *password = NULL;
char **cert;
int cert_index = 0;
int cert_size = ssl_get_config(SSL_MAX_CERT_CFG_OFFSET);
#endif
#ifdef WIN32
char yes = 1;
#else
int yes = 1;
#endif
struct sockaddr_in serv_addr;
struct sockaddr_in client_addr;
int quiet = 0;
#ifdef CONFIG_SSL_CERT_VERIFICATION
int ca_cert_index = 0;
int ca_cert_size = ssl_get_config(SSL_MAX_CA_CERT_CFG_OFFSET);
char **ca_cert = (char **)calloc(1, sizeof(char *)*ca_cert_size);
#endif
fd_set read_set;
#ifndef CONFIG_SSL_SKELETON_MODE
cert = (char **)calloc(1, sizeof(char *)*cert_size);
#endif
while (i < argc)
{
if (strcmp(argv[i], "-accept") == 0)
{
if (i >= argc-1)
{
print_server_options(argv[i]);
}
port = atoi(argv[++i]);
}
#ifndef CONFIG_SSL_SKELETON_MODE
else if (strcmp(argv[i], "-cert") == 0)
{
if (i >= argc-1 || cert_index >= cert_size)
{
print_server_options(argv[i]);
}
cert[cert_index++] = argv[++i];
}
else if (strcmp(argv[i], "-key") == 0)
{
if (i >= argc-1)
{
print_server_options(argv[i]);
}
private_key_file = argv[++i];
options |= SSL_NO_DEFAULT_KEY;
}
else if (strcmp(argv[i], "-pass") == 0)
{
if (i >= argc-1)
{
print_server_options(argv[i]);
}
password = argv[++i];
}
#endif
else if (strcmp(argv[i], "-quiet") == 0)
{
quiet = 1;
options &= ~SSL_DISPLAY_CERTS;
}
#ifdef CONFIG_SSL_CERT_VERIFICATION
else if (strcmp(argv[i], "-verify") == 0)
{
options |= SSL_CLIENT_AUTHENTICATION;
}
else if (strcmp(argv[i], "-CAfile") == 0)
{
if (i >= argc-1 || ca_cert_index >= ca_cert_size)
{
print_server_options(argv[i]);
}
ca_cert[ca_cert_index++] = argv[++i];
}
#endif
#ifdef CONFIG_SSL_FULL_MODE
else if (strcmp(argv[i], "-debug") == 0)
{
options |= SSL_DISPLAY_BYTES;
}
else if (strcmp(argv[i], "-state") == 0)
{
options |= SSL_DISPLAY_STATES;
}
else if (strcmp(argv[i], "-show-rsa") == 0)
{
options |= SSL_DISPLAY_RSA;
}
#endif
else /* don't know what this is */
{
print_server_options(argv[i]);
}
i++;
}
if ((ssl_ctx = ssl_ctx_new(options, SSL_DEFAULT_SVR_SESS)) == NULL)
{
fprintf(stderr, "Error: Server context is invalid\n");
exit(1);
}
#ifndef CONFIG_SSL_SKELETON_MODE
if (private_key_file)
{
int obj_type = SSL_OBJ_RSA_KEY;
/* auto-detect the key type from the file extension */
if (strstr(private_key_file, ".p8"))
obj_type = SSL_OBJ_PKCS8;
else if (strstr(private_key_file, ".p12"))
obj_type = SSL_OBJ_PKCS12;
if (ssl_obj_load(ssl_ctx, obj_type, private_key_file, password))
{
fprintf(stderr, "Error: Private key '%s' is undefined.\n",
private_key_file);
exit(1);
}
}
for (i = 0; i < cert_index; i++)
{
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, cert[i], NULL))
{
printf("Certificate '%s' is undefined.\n", cert[i]);
exit(1);
}
}
#endif
#ifdef CONFIG_SSL_CERT_VERIFICATION
for (i = 0; i < ca_cert_index; i++)
{
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CACERT, ca_cert[i], NULL))
{
printf("Certificate '%s' is undefined.\n", ca_cert[i]);
exit(1);
}
}
free(ca_cert);
#endif
#ifndef CONFIG_SSL_SKELETON_MODE
free(cert);
#endif
/* Create socket for incoming connections */
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("socket");
return;
}
setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
/* Construct local address structure */
memset(&serv_addr, 0, sizeof(serv_addr)); /* Zero out structure */
serv_addr.sin_family = AF_INET; /* Internet address family */
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
serv_addr.sin_port = htons(port); /* Local port */
/* Bind to the local address */
if (bind(server_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
{
perror("bind");
exit(1);
}
if (listen(server_fd, 5) < 0)
{
perror("listen");
exit(1);
}
client_len = sizeof(client_addr);
/*************************************************************************
* This is where the interesting stuff happens. Up until now we've
* just been setting up sockets etc. Now we do the SSL handshake.
*************************************************************************/
for (;;)
{
SSL *ssl;
int reconnected = 0;
if (!quiet)
{
printf("ACCEPT\n");
TTY_FLUSH();
}
if ((client_fd = accept(server_fd,
(struct sockaddr *)&client_addr, &client_len)) < 0)
{
res = 1;
break;
}
ssl = ssl_server_new(ssl_ctx, client_fd);
/* now read (and display) whatever the client sends us */
for (;;)
{
/* allow parallel reading of client and standard input */
FD_ZERO(&read_set);
FD_SET(client_fd, &read_set);
#ifndef WIN32
/* win32 doesn't like mixing up stdin and sockets */
if (isatty(STDIN_FILENO))/* but only if we are in an active shell */
{
FD_SET(STDIN_FILENO, &read_set);
}
if ((res = select(client_fd+1, &read_set, NULL, NULL, NULL)) > 0)
{
uint8_t buf[1024];
/* read standard input? */
if (FD_ISSET(STDIN_FILENO, &read_set))
{
if (fgets((char *)buf, sizeof(buf), stdin) == NULL)
{
res = SSL_ERROR_CONN_LOST;
}
else
{
/* small hack to check renegotiation */
if (buf[0] == 'r' && (buf[1] == '\n' || buf[1] == '\r'))
{
res = ssl_renegotiate(ssl);
}
else /* write our ramblings to the client */
{
res = ssl_write(ssl, buf, strlen((char *)buf)+1);
}
}
}
else /* a socket read */
#endif
{
/* keep reading until we get something interesting */
uint8_t *read_buf;
if ((res = ssl_read(ssl, &read_buf)) == SSL_OK)
{
/* are we in the middle of doing a handshake? */
if (ssl_handshake_status(ssl) != SSL_OK)
{
reconnected = 0;
}
else if (!reconnected)
{
/* we are connected/reconnected */
if (!quiet)
{
display_session_id(ssl);
display_cipher(ssl);
}
reconnected = 1;
}
}
if (res > SSL_OK) /* display our interesting output */
{
printf("%s", read_buf);
TTY_FLUSH();
}
else if (res < SSL_OK && !quiet)
{
ssl_display_error(res);
}
}
#ifndef WIN32
}
#endif
if (res < SSL_OK)
{
if (!quiet)
{
printf("CONNECTION CLOSED\n");
TTY_FLUSH();
}
break;
}
}
/* client was disconnected or the handshake failed. */
ssl_free(ssl);
SOCKET_CLOSE(client_fd);
}
ssl_ctx_free(ssl_ctx);
}
/**
* Implement the SSL client logic.
*/
static void do_client(int argc, char *argv[])
{
#ifdef CONFIG_SSL_ENABLE_CLIENT
int res, i = 2;
uint16_t port = 4433;
uint32_t options = SSL_SERVER_VERIFY_LATER|SSL_DISPLAY_CERTS;
int client_fd;
char *private_key_file = NULL;
struct sockaddr_in client_addr;
struct hostent *hostent;
int reconnect = 0;
uint32_t sin_addr;
SSL_CTX *ssl_ctx;
SSL *ssl = NULL;
int quiet = 0;
int cert_index = 0, ca_cert_index = 0;
int cert_size, ca_cert_size;
char **ca_cert, **cert;
uint8_t session_id[SSL_SESSION_ID_SIZE];
fd_set read_set;
const char *password = NULL;
FD_ZERO(&read_set);
sin_addr = inet_addr("127.0.0.1");
cert_size = ssl_get_config(SSL_MAX_CERT_CFG_OFFSET);
ca_cert_size = ssl_get_config(SSL_MAX_CA_CERT_CFG_OFFSET);
ca_cert = (char **)calloc(1, sizeof(char *)*ca_cert_size);
cert = (char **)calloc(1, sizeof(char *)*cert_size);
while (i < argc)
{
if (strcmp(argv[i], "-connect") == 0)
{
char *host, *ptr;
if (i >= argc-1)
{
print_client_options(argv[i]);
}
host = argv[++i];
if ((ptr = strchr(host, ':')) == NULL)
{
print_client_options(argv[i]);
}
*ptr++ = 0;
port = atoi(ptr);
hostent = gethostbyname(host);
if (hostent == NULL)
{
print_client_options(argv[i]);
}
sin_addr = *((uint32_t **)hostent->h_addr_list)[0];
}
else if (strcmp(argv[i], "-cert") == 0)
{
if (i >= argc-1 || cert_index >= cert_size)
{
print_client_options(argv[i]);
}
cert[cert_index++] = argv[++i];
}
else if (strcmp(argv[i], "-key") == 0)
{
if (i >= argc-1)
{
print_client_options(argv[i]);
}
private_key_file = argv[++i];
options |= SSL_NO_DEFAULT_KEY;
}
else if (strcmp(argv[i], "-CAfile") == 0)
{
if (i >= argc-1 || ca_cert_index >= ca_cert_size)
{
print_client_options(argv[i]);
}
ca_cert[ca_cert_index++] = argv[++i];
}
else if (strcmp(argv[i], "-verify") == 0)
{
options &= ~SSL_SERVER_VERIFY_LATER;
}
else if (strcmp(argv[i], "-reconnect") == 0)
{
reconnect = 4;
}
else if (strcmp(argv[i], "-quiet") == 0)
{
quiet = 1;
options &= ~SSL_DISPLAY_CERTS;
}
else if (strcmp(argv[i], "-pass") == 0)
{
if (i >= argc-1)
{
print_client_options(argv[i]);
}
password = argv[++i];
}
#ifdef CONFIG_SSL_FULL_MODE
else if (strcmp(argv[i], "-debug") == 0)
{
options |= SSL_DISPLAY_BYTES;
}
else if (strcmp(argv[i], "-state") == 0)
{
options |= SSL_DISPLAY_STATES;
}
else if (strcmp(argv[i], "-show-rsa") == 0)
{
options |= SSL_DISPLAY_RSA;
}
#endif
else /* don't know what this is */
{
print_client_options(argv[i]);
}
i++;
}
if ((ssl_ctx = ssl_ctx_new(options, SSL_DEFAULT_CLNT_SESS)) == NULL)
{
fprintf(stderr, "Error: Client context is invalid\n");
exit(1);
}
if (private_key_file)
{
int obj_type = SSL_OBJ_RSA_KEY;
/* auto-detect the key type from the file extension */
if (strstr(private_key_file, ".p8"))
obj_type = SSL_OBJ_PKCS8;
else if (strstr(private_key_file, ".p12"))
obj_type = SSL_OBJ_PKCS12;
if (ssl_obj_load(ssl_ctx, obj_type, private_key_file, password))
{
fprintf(stderr, "Error: Private key '%s' is undefined.\n",
private_key_file);
exit(1);
}
}
for (i = 0; i < cert_index; i++)
{
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, cert[i], NULL))
{
printf("Certificate '%s' is undefined.\n", cert[i]);
exit(1);
}
}
for (i = 0; i < ca_cert_index; i++)
{
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CACERT, ca_cert[i], NULL))
{
printf("Certificate '%s' is undefined.\n", ca_cert[i]);
exit(1);
}
}
free(cert);
free(ca_cert);
/*************************************************************************
* This is where the interesting stuff happens. Up until now we've
* just been setting up sockets etc. Now we do the SSL handshake.
*************************************************************************/
client_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
memset(&client_addr, 0, sizeof(client_addr));
client_addr.sin_family = AF_INET;
client_addr.sin_port = htons(port);
client_addr.sin_addr.s_addr = sin_addr;
if (connect(client_fd, (struct sockaddr *)&client_addr,
sizeof(client_addr)) < 0)
{
perror("connect");
exit(1);
}
if (!quiet)
{
printf("CONNECTED\n");
TTY_FLUSH();
}
/* Try session resumption? */
if (reconnect)
{
while (reconnect--)
{
ssl = ssl_client_new(ssl_ctx, client_fd, session_id,
sizeof(session_id));
if ((res = ssl_handshake_status(ssl)) != SSL_OK)
{
if (!quiet)
{
ssl_display_error(res);
}
ssl_free(ssl);
exit(1);
}
display_session_id(ssl);
memcpy(session_id, ssl_get_session_id(ssl), SSL_SESSION_ID_SIZE);
if (reconnect)
{
ssl_free(ssl);
SOCKET_CLOSE(client_fd);
client_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
connect(client_fd, (struct sockaddr *)&client_addr,
sizeof(client_addr));
}
}
}
else
{
ssl = ssl_client_new(ssl_ctx, client_fd, NULL, 0);
}
/* check the return status */
if ((res = ssl_handshake_status(ssl)) != SSL_OK)
{
if (!quiet)
{
ssl_display_error(res);
}
exit(1);
}
if (!quiet)
{
const char *common_name = ssl_get_cert_dn(ssl,
SSL_X509_CERT_COMMON_NAME);
if (common_name)
{
printf("Common Name:\t\t\t%s\n", common_name);
}
display_session_id(ssl);
display_cipher(ssl);
}
for (;;)
{
uint8_t buf[1024];
res = SSL_OK;
/* allow parallel reading of server and standard input */
FD_SET(client_fd, &read_set);
#ifndef WIN32
/* win32 doesn't like mixing up stdin and sockets */
FD_SET(STDIN_FILENO, &read_set);
if ((res = select(client_fd+1, &read_set, NULL, NULL, NULL)) > 0)
{
/* read standard input? */
if (FD_ISSET(STDIN_FILENO, &read_set))
#endif
{
if (fgets((char *)buf, sizeof(buf), stdin) == NULL)
{
/* bomb out of here */
ssl_free(ssl);
break;
}
else
{
/* small hack to check renegotiation */
if (buf[0] == 'R' && (buf[1] == '\n' || buf[1] == '\r'))
{
res = ssl_renegotiate(ssl);
}
else
{
res = ssl_write(ssl, buf, strlen((char *)buf)+1);
}
}
}
#ifndef WIN32
else /* a socket read */
{
uint8_t *read_buf;
res = ssl_read(ssl, &read_buf);
if (res > 0) /* display our interesting output */
{
printf("%s", read_buf);
TTY_FLUSH();
}
}
}
#endif
if (res < 0)
{
if (!quiet)
{
ssl_display_error(res);
}
break; /* get outta here */
}
}
ssl_ctx_free(ssl_ctx);
SOCKET_CLOSE(client_fd);
#else
print_client_options(argv[1]);
#endif
}
/**
* We've had some sort of command-line error. Print out the basic options.
*/
static void print_options(char *option)
{
printf("axssl: Error: '%s' is an invalid command.\n", option);
printf("usage: axssl [s_server|s_client|version] [args ...]\n");
exit(1);
}
/**
* We've had some sort of command-line error. Print out the server options.
*/
static void print_server_options(char *option)
{
#ifndef CONFIG_SSL_SKELETON_MODE
int cert_size = ssl_get_config(SSL_MAX_CERT_CFG_OFFSET);
#endif
#ifdef CONFIG_SSL_CERT_VERIFICATION
int ca_cert_size = ssl_get_config(SSL_MAX_CA_CERT_CFG_OFFSET);
#endif
printf("unknown option %s\n", option);
printf("usage: s_server [args ...]\n");
printf(" -accept arg\t- port to accept on (default is 4433)\n");
#ifndef CONFIG_SSL_SKELETON_MODE
printf(" -cert arg\t- certificate file to add (in addition to default)"
" to chain -\n"
"\t\t Can repeat up to %d times\n", cert_size);
printf(" -key arg\t- Private key file to use\n");
printf(" -pass\t\t- private key file pass phrase source\n");
#endif
printf(" -quiet\t\t- No server output\n");
#ifdef CONFIG_SSL_CERT_VERIFICATION
printf(" -verify\t- turn on peer certificate verification\n");
printf(" -CAfile arg\t- Certificate authority\n");
printf("\t\t Can repeat up to %d times\n", ca_cert_size);
#endif
#ifdef CONFIG_SSL_FULL_MODE
printf(" -debug\t\t- Print more output\n");
printf(" -state\t\t- Show state messages\n");
printf(" -show-rsa\t- Show RSA state\n");
#endif
exit(1);
}
/**
* We've had some sort of command-line error. Print out the client options.
*/
static void print_client_options(char *option)
{
#ifdef CONFIG_SSL_ENABLE_CLIENT
int cert_size = ssl_get_config(SSL_MAX_CERT_CFG_OFFSET);
int ca_cert_size = ssl_get_config(SSL_MAX_CA_CERT_CFG_OFFSET);
#endif
printf("unknown option %s\n", option);
#ifdef CONFIG_SSL_ENABLE_CLIENT
printf("usage: s_client [args ...]\n");
printf(" -connect host:port - who to connect to (default "
"is localhost:4433)\n");
printf(" -verify\t- turn on peer certificate verification\n");
printf(" -cert arg\t- certificate file to use\n");
printf("\t\t Can repeat up to %d times\n", cert_size);
printf(" -key arg\t- Private key file to use\n");
printf(" -CAfile arg\t- Certificate authority\n");
printf("\t\t Can repeat up to %d times\n", ca_cert_size);
printf(" -quiet\t\t- No client output\n");
printf(" -reconnect\t- Drop and re-make the connection "
"with the same Session-ID\n");
printf(" -pass\t\t- private key file pass phrase source\n");
#ifdef CONFIG_SSL_FULL_MODE
printf(" -debug\t\t- Print more output\n");
printf(" -state\t\t- Show state messages\n");
printf(" -show-rsa\t- Show RSA state\n");
#endif
#else
printf("Change configuration to allow this feature\n");
#endif
exit(1);
}
/**
* Display what cipher we are using
*/
static void display_cipher(SSL *ssl)
{
printf("CIPHER is ");
switch (ssl_get_cipher_id(ssl))
{
case SSL_AES128_SHA:
printf("AES128-SHA");
break;
case SSL_AES256_SHA:
printf("AES256-SHA");
break;
case SSL_RC4_128_SHA:
printf("RC4-SHA");
break;
case SSL_RC4_128_MD5:
printf("RC4-MD5");
break;
default:
printf("Unknown - %d", ssl_get_cipher_id(ssl));
break;
}
printf("\n");
TTY_FLUSH();
}
/**
* Display what session id we have.
*/
static void display_session_id(SSL *ssl)
{
int i;
const uint8_t *session_id = ssl_get_session_id(ssl);
int sess_id_size = ssl_get_session_id_size(ssl);
if (sess_id_size > 0)
{
printf("-----BEGIN SSL SESSION PARAMETERS-----\n");
for (i = 0; i < sess_id_size; i++)
{
printf("%02x", session_id[i]);
}
printf("\n-----END SSL SESSION PARAMETERS-----\n");
TTY_FLUSH();
}
}