On Tue, 14 Mar 2000, Catherine Grogan wrote:
> Can anyone help with this ?
>
> If someone has a very simple example of how to do basic authentication
> then that would be great as I could use it as a starting point.
>
> Thanks in advance,
>
> Catherine.
>
>
I've attached a client and server example for doing just what you
want. They were written for 0.9.4 but should be okay for the latest.
I assume you know C...
BTW, if you have any job openings over there let me know... ;-)
---------------------------------------------------------------------------
Andy Moskoff e-mail: [EMAIL PROTECTED]
Senior Software Engineer
Symark Software
/* 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/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 CERTF "/usr/home/amoskoff/spock/clientcert.pem"
#define KEYF "/usr/home/amoskoff/spock/clientreq.pem"
#define CAFILE "/usr/home/amoskoff/spock/demoCA/168f3142"
#define CAPATH "/usr/home/amoskoff/spock/demoCA"
#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];
SSL_METHOD *meth;
SSL_load_error_strings();
SSLeay_add_ssl_algorithms();
meth = SSLv3_client_method();
ctx = SSL_CTX_new (meth);
CHK_NULL(ctx);
CHK_SSL(err);
/* set flag to force server to be verified */
SSL_CTX_set_verify(ctx,
SSL_VERIFY_FAIL_IF_NO_PEER_CERT|SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
NULL);
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);
}
if (!SSL_CTX_load_verify_locations(ctx, NULL, CAPATH)) {
fprintf(stderr,"Unable to load CA file/path\n");
exit(6);
}
/* Send a list of acceptable CAs to server */
SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(CAFILE));
/* ----------------------------------------------- */
/* 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");
/* ----------------------------------------------- */
/* 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);
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 */
/* 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 "/usr/home/amoskoff/spock/servercert.pem"
#define KEYF "/usr/home/amoskoff/spock/serverreq.pem"
#define CAFILE "/usr/home/amoskoff/spock/demoCA/cacert.pem"
#define CAPATH "/usr/home/amoskoff/spock/demoCA"
#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 listen_sd;
int sd;
struct sockaddr_in sa_serv;
struct sockaddr_in sa_cli;
size_t client_len;
SSL_CTX* ctx;
SSL* ssl;
X509* client_cert;
char* str;
char buf [4096];
SSL_METHOD *meth;
/* SSL preliminaries. We keep the certificate and key with the context. */
SSL_load_error_strings();
SSLeay_add_ssl_algorithms();
meth = SSLv3_server_method();
ctx = SSL_CTX_new (meth);
if (!ctx) {
ERR_print_errors_fp(stderr);
exit(2);
}
/* set flag to force client to be verified */
SSL_CTX_set_verify(ctx,
SSL_VERIFY_FAIL_IF_NO_PEER_CERT|SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
NULL);
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);
}
#if 0
if (!SSL_CTX_set_default_verify_paths(ctx)) {
fprintf(stderr,"Unable to set default verify paths\n");
exit(6);
}
#endif
if (!SSL_CTX_load_verify_locations(ctx, NULL, CAPATH)) {
fprintf(stderr,"Unable to load CA file/path\n");
exit(7);
}
/* Send a list of acceptable CAs to client */
SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(CAFILE));
/* ----------------------------------------------- */
/* 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 %lx, 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 */
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");
/* 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);
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 */
