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/* inetdserv.cpp - Minimal ssleay server for Unix inetd.conf
* 30.9.1996, Sampo Kellomaki <sampo@iki.fi>
* From /etc/inetd.conf:
* 1111 stream tcp nowait sampo /usr/users/sampo/demo/inetdserv inetdserv
*/
#include <stdio.h>
#include <errno.h>
#include "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 "/usr/users/sampo/demo/"
#define CERTF HOME "plain-cert.pem"
#define KEYF HOME "plain-key.pem"
#define CHK_NULL(x) if ((x)==NULL) exit (1)
#define CHK_ERR(err,s) if ((err)==-1) \
{ fprintf(log, "%s %d\n", (s), errno); exit(1); }
#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(log); exit(2); }
void main ()
{
int err;
SSL_CTX* ctx;
SSL* ssl;
X509* client_cert;
char* str;
char buf [4096];
FILE* log;
log = fopen ("/dev/console", "a"); CHK_NULL(log);
fprintf (log, "inetdserv %ld\n", (long)getpid());
SSL_load_error_strings();
ctx = SSL_CTX_new (); CHK_NULL(ctx);
err = SSL_CTX_use_RSAPrivateKey_file (ctx, KEYF, SSL_FILETYPE_PEM);
CHK_SSL (err);
err = SSL_CTX_use_certificate_file (ctx, CERTF, SSL_FILETYPE_PEM);
CHK_SSL (err);
/* inetd has already opened the TCP connection, so we can get right
down to business. */
ssl = SSL_new (ctx); CHK_NULL(ssl);
SSL_set_fd (ssl, fileno(stdin));
err = SSL_accept (ssl); CHK_SSL(err);
/* Get the cipher - opt */
fprintf (log, "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) {
fprintf (log, "Client certificate:\n");
str = X509_NAME_oneline (X509_get_subject_name (client_cert));
CHK_NULL(str);
fprintf (log, "\t subject: %s\n", str);
OPENSSL_free (str);
str = X509_NAME_oneline (X509_get_issuer_name (client_cert));
CHK_NULL(str);
fprintf (log, "\t issuer: %s\n", str);
OPENSSL_free (str);
/* We could do all sorts of certificate verification stuff here before
deallocating the certificate. */
X509_free (client_cert);
} else
fprintf (log, "Client doe 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';
fprintf (log, "Got %d chars:'%s'\n", err, buf);
err = SSL_write (ssl, "Loud and clear.", strlen("Loud and clear."));
CHK_SSL(err);
/* Clean up. */
fclose (log);
SSL_free (ssl);
SSL_CTX_free (ctx);
}
/* EOF - inetdserv.cpp */