WolfSSL
/
wolfssl-examples
mirror of https://github.com/wolfSSL/wolfssl-examples.git
1
0
Fork 0
Code Issues Releases Wiki Activity
wolfssl-examples/tls-options/server-tls-peerauth.c

356 lines
11 KiB
C
Raw Blame History

/* server-tls.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* the usual suspects */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* socket includes */
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
/* wolfSSL */
#include <wolfssl/options.h>
#include <wolfssl/ssl.h>
#define DEFAULT_PORT 11111
#define CA_CERT_FILE "../certs/ca-cert.pem"
#define CERT_FILE "../certs/server-cert.pem"
#define KEY_FILE "../certs/server-key.pem"
#define CERT_BUFFER_SZ 2048
enum {
VERIFY_OVERRIDE_ERROR,
VERIFY_FORCE_FAIL,
VERIFY_USE_PREVERIFY,
VERIFY_DEFAULT,
VERIFY_OVERRIDE_DATE_ERR
};
static THREAD_LS_T int myVerifyAction = VERIFY_DEFAULT;
static WC_INLINE int myVerify(int preverify, WOLFSSL_X509_STORE_CTX* store)
{
char buffer[WOLFSSL_MAX_ERROR_SZ];
WOLFSSL_X509* peer;
char issuerBuffer[CERT_BUFFER_SZ];
char subjectBuffer[CERT_BUFFER_SZ];
fprintf(stderr, "In verification callback, error = %d, %s\n", store->error,
wolfSSL_ERR_error_string(store->error, buffer));
peer = store->current_cert;
if (peer) {
wolfSSL_X509_NAME_oneline(
wolfSSL_X509_get_issuer_name(peer), issuerBuffer, CERT_BUFFER_SZ);
wolfSSL_X509_NAME_oneline(
wolfSSL_X509_get_subject_name(peer), subjectBuffer, CERT_BUFFER_SZ);
printf("\tPeer's cert info:\n issuer : %s\n subject: %s\n",
issuerBuffer, subjectBuffer);
}
else
fprintf(stderr, "\tPeer has no cert!\n");
printf("\tSubject's domain name at %d is %s\n",
store->error_depth, store->domain);
switch (myVerifyAction) {
case VERIFY_OVERRIDE_ERROR:
return 1;
case VERIFY_FORCE_FAIL:
return 0;
case VERIFY_DEFAULT:
case VERIFY_USE_PREVERIFY:
return preverify;
case VERIFY_OVERRIDE_DATE_ERR:
if (store->error == ASN_BEFORE_DATE_E
|| store->error == ASN_AFTER_DATE_E)
return 1;
return 0;
}
fprintf(stderr, "Invalid verify action.\n");
exit(1);
}
int switchPeerAuthMode(char *mode)
{
if (XSTRCMP("NONE", mode) == 0) {
return SSL_VERIFY_NONE;
}
else if (XSTRCMP("PEER", mode) == 0) {
return SSL_VERIFY_PEER;
}
else if (XSTRCMP("FAIL_IN_NO_PEER_CERT", mode) == 0) {
return SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
}
else if (XSTRCMP("FAIL_EXCEPT_PSK", mode) == 0) {
return SSL_VERIFY_FAIL_EXCEPT_PSK;
}
fprintf(stderr, "Invalid peer auth mode.\n");
exit(1);
}
int switchMyVerifyAction(char *mode)
{
if (XSTRCMP("OVERRIDE_ERROR", mode) == 0) {
return VERIFY_OVERRIDE_ERROR;
}
else if (XSTRCMP("FORCE_FAIL", mode) == 0) {
return VERIFY_FORCE_FAIL;
}
else if (XSTRCMP("USE_PREVERIFY", mode) == 0) {
return VERIFY_USE_PREVERIFY;
}
else if (XSTRCMP("OVERRIDE_DATE_ERR", mode) == 0) {
return VERIFY_OVERRIDE_DATE_ERR;
}
fprintf(stderr, "Invalid verify action.\n");
exit(1);
}
int main(int argc, char **argv)
{
int sockfd = SOCKET_INVALID;
int connd = SOCKET_INVALID;
struct sockaddr_in servAddr;
struct sockaddr_in clientAddr;
socklen_t size = sizeof(clientAddr);
char buff[256];
size_t len;
int shutdown = 0;
int ret;
int diff = 0;
int peerAuthMode = WOLFSSL_VERIFY_DEFAULT;
const char* reply = "I hear ya fa shizzle!\n";
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx = NULL;
WOLFSSL* ssl = NULL;
/* Initialize wolfSSL */
wolfSSL_Init();
/* Check options */
if (argc >= 3) {
if (XSTRCMP("-a", argv[1]) == 0) {
peerAuthMode = switchPeerAuthMode(argv[2]);
diff += 2;
}
if (XSTRCMP("-m", argv[1]) == 0) {
myVerifyAction = switchMyVerifyAction(argv[2]);
diff += 2;
}
}
if (argc >= 5) {
if (XSTRCMP("-a", argv[3]) == 0) {
peerAuthMode = switchPeerAuthMode(argv[4]);
diff += 2;
}
if (XSTRCMP("-m", argv[3]) == 0) {
myVerifyAction = switchMyVerifyAction(argv[4]);
diff += 2;
}
}
/* Set specify cert/key files */
if (argc-diff != 1) {
printf("usage:\n"
"\t./server-tls-peerauth -a <Peer auth mode>\n"
"\t./server-tls-peerauth -m <Verify mode>\n"
"\t./server-tls-peerauth \\\n"
"\t\t-a <Peer auth mode> -m <Verify mode> \n"
"\n"
"Peer auth mode:\n"
"\tNONE, PEER,\n"
"\tFAIL_IF_NO_PEER_CERT,\n"
"\tFAIL_EXCEPT_PSK\n"
"\n"
"Verify mode:\n"
"\tOVERRIDE_ERROR,\n"
"\tFORCE_FAIL,\n"
"\tUSE_PREVERIFY,\n"
"\tOVERRIDE_DATE_ERR\n");
return 0;
}
/* Create a socket that uses an internet IPv4 address,
* Sets the socket to be stream based (TCP),
* 0 means choose the default protocol. */
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
fprintf(stderr, "ERROR: failed to create the socket\n");
ret = -1;
goto exit;
}
/* Create and initialize WOLFSSL_CTX */
if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method())) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
ret = -1;
goto exit;
}
/* Set peer auth mode */
if (peerAuthMode != WOLFSSL_VERIFY_DEFAULT) {
wolfSSL_CTX_set_verify(ctx, peerAuthMode, myVerify);
}
/* If peer auth is enabled, Load CA certificates into WOLFSSL_CTX */
if (peerAuthMode != WOLFSSL_VERIFY_DEFAULT
&& peerAuthMode != WOLFSSL_VERIFY_NONE) {
if ((ret = wolfSSL_CTX_load_verify_locations(ctx, CA_CERT_FILE, NULL))
!= SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, "
"please check the file.\n", CA_CERT_FILE);
goto exit;
}
}
/* Load server certificates into WOLFSSL_CTX */
if ((ret = wolfSSL_CTX_use_certificate_file(ctx, CERT_FILE,
SSL_FILETYPE_PEM)) != WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
CERT_FILE);
goto exit;
}
/* Load server key into WOLFSSL_CTX */
if ((ret = wolfSSL_CTX_use_PrivateKey_file(ctx, KEY_FILE, SSL_FILETYPE_PEM))
!= WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
KEY_FILE);
goto exit;
}
/* Initialize the server address struct with zeros */
memset(&servAddr, 0, sizeof(servAddr));
/* Fill in the server address */
servAddr.sin_family = AF_INET; /* using IPv4 */
servAddr.sin_port = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
servAddr.sin_addr.s_addr = INADDR_ANY; /* from anywhere */
/* Bind the server socket to our port */
if (bind(sockfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) == -1) {
fprintf(stderr, "ERROR: failed to bind\n");
ret = -1;
goto exit;
}
/* Listen for a new connection, allow 5 pending connections */
if (listen(sockfd, 5) == -1) {
fprintf(stderr, "ERROR: failed to listen\n");
ret = -1;
goto exit;
}
/* Continue to accept clients until shutdown is issued */
while (!shutdown) {
printf("Waiting for a connection...\n");
/* Accept client connections */
if ((connd = accept(sockfd, (struct sockaddr*)&clientAddr, &size))
== -1) {
fprintf(stderr, "ERROR: failed to accept the connection\n\n");
ret = -1;
goto exit;
}
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
ret = -1;
goto exit;
}
/* Attach wolfSSL to the socket */
wolfSSL_set_fd(ssl, connd);
/* Establish TLS connection */
ret = wolfSSL_accept(ssl);
if (ret != WOLFSSL_SUCCESS) {
fprintf(stderr, "wolfSSL_accept error = %d\n",
wolfSSL_get_error(ssl, ret));
goto exit;
}
printf("Client connected successfully\n");
/* Read the client data into our buff array */
memset(buff, 0, sizeof(buff));
if ((ret = wolfSSL_read(ssl, buff, sizeof(buff)-1)) == -1) {
fprintf(stderr, "ERROR: failed to read\n");
goto exit;
}
/* Print to stdout any data the client sends */
printf("Client: %s\n", buff);
/* Check for server shutdown command */
if (strncmp(buff, "shutdown", 8) == 0) {
printf("Shutdown command issued!\n");
shutdown = 1;
}
/* Write our reply into buff */
memset(buff, 0, sizeof(buff));
memcpy(buff, reply, strlen(reply));
len = strnlen(buff, sizeof(buff));
/* Reply back to the client */
if ((ret = wolfSSL_write(ssl, buff, len)) != len) {
fprintf(stderr, "ERROR: failed to write\n");
goto exit;
}
/* Notify the client that the connection is ending */
wolfSSL_shutdown(ssl);
printf("Shutdown complete\n");
/* Cleanup after this connection */
wolfSSL_free(ssl); /* Free the wolfSSL object */
ssl = NULL;
close(connd); /* Close the connection to the client */
}
ret = 0;
exit:
/* Cleanup and return */
if (ssl)
wolfSSL_free(ssl); /* Free the wolfSSL object */
if (connd != SOCKET_INVALID)
close(connd); /* Close the connection to the client */
if (sockfd != SOCKET_INVALID)
close(sockfd); /* Close the socket listening for clients */
if (ctx)
wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
return ret; /* Return reporting a success */
}
Reference in New Issue View Git Blame Copy Permalink