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wolfssl-examples/tls/client-tls-pkcs12.c

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/* client-tls-pkcs12.c
*
* Copyright (C) 2006-2020 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
*/
/*
* To test this example simply run against the default wolfSSL server:
* : cd ~/path-to-wolfssl-root/
* : ./examples/server/server
*/
/* 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>
#include <wolfssl/wolfcrypt/pkcs12.h>
#define DEFAULT_PORT 11111
#define APP_ERR -999
#define ERR_NO_CA_IN_P12 -1000
int main(int argc, char** argv)
{
int ret = 0;
#if defined(OPENSSL_EXTRA) && !defined(NO_PWDBASED) && !defined(NO_ASN) \
&& !defined(NO_DES3) && defined(WOLFSSL_KEY_GEN)
int sockfd;
struct sockaddr_in servAddr;
char buff[256];
size_t len;
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx;
WOLFSSL* ssl = NULL; /* init to NULL, wolfSSL_free can account for it */
/*----------------------------------------------------------------------------*/
/* updates from the original example client-tls.c */
/*----------------------------------------------------------------------------*/
byte buffer[5300];
char file[] = "../certs/test-clientbundle.p12";
char pass[] = "wolfSSL test";
FILE *f;
int firstLoop = 1;
int root_ca_buf_size = -1, bytes;
byte* root_ca_buf;
WOLFSSL_BIO* bio;
WOLFSSL_EVP_PKEY* pkey;
WC_PKCS12* pkcs12;
WOLFSSL_X509* cert;
WOLFSSL_X509* tmp;
WOLF_STACK_OF(WOLFSSL_X509)* ca;
/*----------------------------------------------------------------------------*/
(void) ret; /* ignore unused */
/* Check for proper calling convention */
if (argc != 2) {
printf("usage: %s <IPv4 address>\n", argv[0]);
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");
return -1;
}
/* 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 */
/* Get the server IPv4 address from the command line call */
if (inet_pton(AF_INET, argv[1], &servAddr.sin_addr) != 1) {
fprintf(stderr, "ERROR: invalid address\n");
return -1;
}
/* Connect to the server */
if (connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr)) == -1) {
fprintf(stderr, "ERROR: failed to connect\n");
return -1;
}
/*----------------------------------------------------------------------------*/
/* Extract cert, key, CA from PKCS12 file for use in mutual auth */
/*----------------------------------------------------------------------------*/
f = fopen(file, "rb");
if (!f) {
printf("Error opening %s check the file\n", file);
return APP_ERR;
}
bytes = (int)fread(buffer, 1, sizeof(buffer), f);
printf("Read %d bytes from file\n", bytes);
fclose(f);
/* Initialize wolfSSL */
wolfSSL_Init();
/* Create and initialize WOLFSSL_CTX */
#ifdef USE_TLSV13
ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method());
#else
ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method());
#endif
if (ctx == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
return -1;
}
bio = wolfSSL_BIO_new_mem_buf((void*)buffer, bytes);
if (!bio) {
printf("Failed to create bio\n");
wolfSSL_CTX_free(ctx);
wolfSSL_Cleanup();
close(sockfd);
return APP_ERR;
}
pkcs12 = wolfSSL_d2i_PKCS12_bio(bio, NULL);
if (!pkcs12) {
printf("Failed the d2i_PKCS12_bio call\n");
wolfSSL_CTX_free(ctx);
wolfSSL_Cleanup();
wolfSSL_BIO_free(bio);
close(sockfd);
return APP_ERR;
}
/* check parse with extra certs kept */
if ((ret = wolfSSL_PKCS12_parse(pkcs12, pass, &pkey, &cert, &ca))
!= WOLFSSL_SUCCESS) {
printf("Failed to parse the PKCS12 data. ret = %d\n", ret);
ret = APP_ERR;
goto client_example_end;
}
/* NOTE: these two calls are optional, only required for mutual auth */
/*optional, load key that cooresponds to client cert */
if ((ret = wolfSSL_CTX_use_PrivateKey(ctx, pkey)) != SSL_SUCCESS) {
printf("Failed to load the privateKey. ret = %d\n", ret);
ret = APP_ERR;
goto client_example_end;
}
/* optional load a client cert */
if ((ret = wolfSSL_CTX_use_certificate(ctx, cert)) != SSL_SUCCESS) {
printf("Failed to load certificate. ret = %d\n", ret);
ret = APP_ERR;
goto client_example_end;
}
/* This step is REQUIRED to validate the peer being connected to */
if (ca != NULL) {
do {
tmp = wolfSSL_sk_X509_pop(ca);
if (tmp == NULL && firstLoop) {
return ERR_NO_CA_IN_P12;
} else if (tmp != NULL) {
/* do something interesting with tmp, maybe it's an intermediate
* CA, maybe it's the root CA?
*/
ret = wolfSSL_X509_get_isCA(tmp);
if (ret == 1) {
root_ca_buf = (byte*) wolfSSL_X509_get_der(tmp,
&root_ca_buf_size);
if ((ret = wolfSSL_CTX_load_verify_buffer(ctx, root_ca_buf,
root_ca_buf_size,
SSL_FILETYPE_ASN1)
) != SSL_SUCCESS) {
printf("Failed to load CA. ret = %d\n", ret);
ret = APP_ERR;
goto client_example_end;
}
wolfSSL_X509_free(tmp);
} else {
wolfSSL_X509_free(tmp);
}
}
firstLoop = 0;
/* Continue popping until no certs left or target cert is found */
} while (tmp != NULL);
}
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(ctx)) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
ret = -1;
goto client_example_end;
}
/* Attach wolfSSL to the socket */
wolfSSL_set_fd(ssl, sockfd);
/* Connect to wolfSSL on the server side */
if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
ret = -1;
goto client_example_end;
}
/* Get a message for the server from stdin */
printf("Message for server: ");
memset(buff, 0, sizeof(buff));
if (fgets(buff, sizeof(buff), stdin) == NULL) {
fprintf(stderr, "ERROR: failed to get message for server\n");
ret = -1;
goto client_example_end;
}
len = strnlen(buff, sizeof(buff));
/* Send the message to the server */
if (wolfSSL_write(ssl, buff, (int) len) != len) {
fprintf(stderr, "ERROR: failed to write\n");
ret = -1;
goto client_example_end;
}
/* Read the server data into our buff array */
memset(buff, 0, sizeof(buff));
if (wolfSSL_read(ssl, buff, sizeof(buff)-1) == -1) {
fprintf(stderr, "ERROR: failed to read\n");
ret = -1;
}
/* Print to stdout any data the server sends */
printf("Server: %s\n", buff);
ret = 0;
client_example_end:
/* Cleanup and return */
wolfSSL_free(ssl); /* Free the wolfSSL object */
wolfSSL_EVP_PKEY_free(pkey);
wolfSSL_X509_free(cert);
wc_PKCS12_free(pkcs12);
wolfSSL_BIO_free(bio);
wolfSSL_sk_X509_free(ca);
wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
close(sockfd); /* Close the connection to the server */
#else
#ifndef OPENSSL_EXTRA
printf("wolfSSL not configured with --enable-opensslextra\n");
#endif
#ifdef NO_PWDBASED
printf("wolfSSL not configured with --enable-pwdbased\n");
#endif
#ifdef NO_ASN
printf("wolfSSL not configured with --enable-asn support\n");
#endif
#ifdef NO_DES3
printf("wolfSSL not configured with --enable-des3\n");
#endif
#ifndef WOLFSSL_KEY_GEN
printf("wolfSSL not configured with --enable-keygen\n");
#endif
printf("Please re-configure and re-install wolfSSL before using\n"
"this example\n\n");
#endif
return ret; /* Return reporting a success */
}
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