The question is: as I have written in my previous mail, I have modified
the cli.cpp and serv.cpp to get client authentication. I have done that
in the same way than server authentication, that it seems the logic way
to do that, but it doesn't work. I have spent all the week trying to solve
it but I haven't got it yet. So if somebody is so kind to read it and try
to detect an error, it will help me, if not it doesn't matter, as I already
say it.
in red it is my modifications for the client authentication:
/* CLIENT */
/* This program have been done from cli.cpp */
/*---------------------------------------------------------*/
/* cli.cpp - Minimal ssleay client for Unix
30.9.1996, Sampo Kellomaki <[EMAIL PROTECTED]> */
/* mangled to work with SSLeay-0.9.0b and OpenSSL 0.9.2b
Simplified to be even more minimal
12/98 - 4/99 Wade Scholine <[EMAIL PROTECTED]> */
/*---------------------------------------------------------*/
#include <stdio.h>
#include <memory.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <openssl/crypto.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#define CERTF "//home/serra/OpenSSL/opensslsun/clientcert.pem"
#define KEYF "//home/serra/OpenSSL/opensslsun/clientkey.pem"
#define CHK_NULL(x) if ((x)==NULL) exit (1)
#define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); }
#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr);
exit(2); }
void main ()
{
int err;
int sd;
struct sockaddr_in sa;
SSL_CTX* ctx;
SSL* ssl;
X509* server_cert;
char* str;
char buf [4096], randfname [4096];
SSL_METHOD *meth;
FILE *fd;
int i;
SSLeay_add_ssl_algorithms();
meth = SSLv2_client_method();
SSL_load_error_strings();
ctx = SSL_CTX_new (meth);
CHK_NULL(ctx);
/* to get client authentication */
if (!ctx) {
ERR_print_errors_fp(stderr);
exit(2);
}
if (SSL_CTX_use_certificate_file(ctx, CERTF,
SSL_FILETYPE_PEM) <= 0) {
ERR_print_errors_fp(stderr);
exit(3);
}
if (SSL_CTX_use_PrivateKey_file(ctx, KEYF,
SSL_FILETYPE_PEM) <= 0) {
ERR_print_errors_fp(stderr);
exit(4);
}
if (!SSL_CTX_check_private_key(ctx)) {
fprintf(stderr,"Private key
does not match the certificate public key\n");
exit(5);
}
/* finish modification */
CHK_SSL(err);
/* ----------------------------------------------- */
/* Create a socket and connect to server using normal socket
calls. */
sd = socket (AF_INET, SOCK_STREAM, 0);
CHK_ERR(sd, "socket");
memset (&sa, '\0', sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = inet_addr ("127.0.0.1"); /*
Server IP */
sa.sin_port = htons
(1111); /* Server
Port number */
err = connect(sd, (struct sockaddr*) &sa,
sizeof(sa));
CHK_ERR(err, "connect");
if (!RAND_file_name(randfname, 4096)) {
printf("Can't get rand file name: set env var RANDOM\n");
exit (1);
}
if (!RAND_load_file(randfname, -1)) {
printf("Can't load random bytes\n");
exit(1);
}
/* ----------------------------------------------- */
/* Now we have TCP conncetion. Start SSL negotiation. */
ssl = SSL_new (ctx);
CHK_NULL(ssl);
SSL_set_fd (ssl, sd);
err = SSL_connect (ssl);
CHK_SSL(err);
/* Following two steps are optional and not required for
data exchange to be successful. */
/* Get the cipher - opt */
printf ("SSL connection using %s\n", SSL_get_cipher (ssl));
/* Get server's certificate (note: beware of dynamic allocation)
- opt */
server_cert = SSL_get_peer_certificate (ssl);
CHK_NULL(server_cert);
printf ("Server certificate:\n");
str = X509_NAME_oneline (X509_get_subject_name (server_cert),0,0);
CHK_NULL(str);
printf ("\t subject: %s\n", str);
Free (str);
str = X509_NAME_oneline (X509_get_issuer_name (server_cert),0,0);
CHK_NULL(str);
printf ("\t issuer: %s\n", str);
Free (str);
/* We could do all sorts of certificate verification stuff here
before
deallocating the certificate. */
X509_free (server_cert);
/* --------------------------------------------------- */
/* DATA EXCHANGE - Send a message and receive a reply. */
err = SSL_write (ssl, "Hello World!", strlen("Hello World!"));
CHK_SSL(err);
if (!RAND_write_file(randfname)) {
printf("Can't write random state\n");
exit(1);
}
/* modification to read a file */
err = SSL_read (ssl, buf, sizeof(buf) - 1);
CHK_SSL(err);
buf[err] = '\0';
printf ("Got %d chars:'%s'\n", err, buf);
fd=fopen("file.out","w");
if (fd==NULL) printf("cannot open file");
i=0;
while ((buf[i]!='\0') || (i==4096))
{
fputc(buf[i],fd);
i++;
}
if (fclose(fd)!=0) printf("cannot close file");
/*end of modification*/
/*err = SSL_read (ssl, buf, sizeof(buf) - 1);
CHK_SSL(err);*/
/*buf[err] = '\0';*/
/*printf ("Got %d chars:'%s'\n", err, buf);*/
SSL_shutdown (ssl); /* send SSL/TLS close_notify */
/* Clean up. */
close (sd);
SSL_free (ssl);
SSL_CTX_free (ctx);
}
/* EOF - cli.cpp */
--------------------------------------------------------
/* SERVER */
/* serv.cpp - Minimal ssleay server for Unix
30.9.1996, Sampo Kellomaki <[EMAIL PROTECTED]> */
/* mangled to work with SSLeay-0.9.0b and OpenSSL 0.9.2b
Simplified to be even more minimal
12/98 - 4/99 Wade Scholine <[EMAIL PROTECTED]> */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <memory.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <openssl/rsa.h> /* SSLeay
stuff */
#include <openssl/crypto.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
/* define HOME to be dir for key and cert files... */
#define HOME "./"
/* Make these what you want for cert & key files */
/*#define CERTF HOME "foo-cert.pem"*/
/*#define KEYF HOME "foo-cert.pem"*/
#define CERTF "//home/serra/OpenSSL/opensslsun/mycert.pem"
#define KEYF "//home/serra/OpenSSL/opensslsun/mykey.pem"
#define CHK_NULL(x) if ((x)==NULL) exit (1)
#define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); }
#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr);
exit(2); }
int main ()
{
int err;
int listen_sd;
int sd;
struct sockaddr_in sa_serv;
struct sockaddr_in sa_cli;
// size_t client_len;
int client_len;
SSL_CTX* ctx;
SSL* ssl;
X509* client_cert;
char* str;
char buf [4096];
SSL_METHOD *meth;
FILE *fd;
int i;
/* SSL preliminaries. We keep the certificate and key with the
context. */
SSL_load_error_strings();
SSLeay_add_ssl_algorithms();
meth = SSLv23_server_method();
ctx = SSL_CTX_new (meth);
if (!ctx) {
ERR_print_errors_fp(stderr);
exit(2);
}
if (SSL_CTX_use_certificate_file(ctx, CERTF, SSL_FILETYPE_PEM)
<= 0) {
ERR_print_errors_fp(stderr);
exit(3);
}
if (SSL_CTX_use_PrivateKey_file(ctx, KEYF, SSL_FILETYPE_PEM)
<= 0) {
ERR_print_errors_fp(stderr);
exit(4);
}
if (!SSL_CTX_check_private_key(ctx)) {
fprintf(stderr,"Private key does not match the certificate
public key\n");
exit(5);
}
/* ----------------------------------------------- */
/* Prepare TCP socket for receiving connections */
listen_sd = socket (AF_INET, SOCK_STREAM, 0); CHK_ERR(listen_sd,
"socket");
memset (&sa_serv, '\0', sizeof(sa_serv));
sa_serv.sin_family = AF_INET;
sa_serv.sin_addr.s_addr = INADDR_ANY;
sa_serv.sin_port =
htons (1111); /*
Server Port number */
err = bind(listen_sd, (struct sockaddr*) &sa_serv,
sizeof (sa_serv));
CHK_ERR(err, "bind");
/* Receive a TCP connection. */
err = listen (listen_sd, 5);
CHK_ERR(err, "listen");
client_len = sizeof(sa_cli);
sd = accept (listen_sd, (struct sockaddr*) &sa_cli, &client_len);
CHK_ERR(sd, "accept");
close (listen_sd);
printf ("Connection from %x, port %x\n",
sa_cli.sin_addr.s_addr, sa_cli.sin_port);
/* ----------------------------------------------- */
/* TCP connection is ready. Do server side SSL. */
ssl = SSL_new (ctx);
CHK_NULL(ssl);
SSL_set_fd (ssl, sd);
err = SSL_accept (ssl);
CHK_SSL(err);
/* Get the cipher - opt */
printf ("SSL connection using %s\n", SSL_get_cipher (ssl));
/* Get client's certificate (note: beware
of dynamic allocation) - opt */
/* I haven't modified anything from here,
does it work this getting client's certificate? */
client_cert = SSL_get_peer_certificate (ssl);
if (client_cert != NULL) {
printf ("Client certificate:\n");
str = X509_NAME_oneline (X509_get_subject_name (client_cert),
0, 0);
CHK_NULL(str);
printf ("\t subject: %s\n", str);
Free (str);
str = X509_NAME_oneline (X509_get_issuer_name
(client_cert), 0, 0);
CHK_NULL(str);
printf ("\t issuer: %s\n", str);
Free (str);
/* We could do all sorts of certificate verification
stuff here before
deallocating the certificate.
*/
X509_free (client_cert);
} else
printf ("Client does not have certificate.\n");
/* I alway ge Client does... as client_cert is NULL */
/* DATA EXCHANGE - Receive message and send reply. */
err = SSL_read (ssl, buf, sizeof(buf) - 1);
CHK_SSL(err);
buf[err] = '\0';
printf ("Got %d chars:'%s'\n", err, buf);
/* modification to see how to transmit a file */
fd = fopen("file.txt","r");
if (fd==NULL) printf("cannot open file");
i=0;
while(!feof(fd))
{
buf[i]=fgetc(fd);
i++;
}
if (fclose(fd)!=0) printf("cannot close file");
err = SSL_write (ssl, buf, sizeof(buf)); CHK_SSL(err);
/*finish modification */
/*err = SSL_write (ssl, "I hear you.", strlen("I hear you."));
CHK_SSL(err);*/
/* Clean up. */
close (sd);
SSL_free (ssl);
SSL_CTX_free (ctx);
}
/* EOF - serv.cpp */
-------------------------------------------------------------------
THANK YOU VERY MUCH
-- Albert SERRA =========================================== Integrated Systems Laboratory (DE/LSI-EPFL) email: [EMAIL PROTECTED]begin:vcard n:Serra Pages;Albert x-mozilla-html:FALSE version:2.1 email;internet:[EMAIL PROTECTED] adr;quoted-printable:;;Residence Marcolet =0D=0APre-Fontaine 12 Ch. 23;1023 Crissier; ;;Switzerland x-mozilla-cpt:;0 fn:Albert Serra Pages end:vcard
