126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
/* serv.cpp - Minimal ssleay server for Unix
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30.9.1996, Sampo Kellomaki <sampo@iki.fi> */
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#include <stdio.h>
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#include <memory.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <openssl/rsa.h> /* SSLeay stuff */
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#include <openssl/crypto.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#define HOME "/usr/users/sampo/sibs/tim/"
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#define CERTF HOME "plain-cert.pem"
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#define KEYF HOME "plain-key.pem"
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#define CHK_NULL(x) if ((x)==NULL) exit (1)
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#define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); }
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#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr); exit(2); }
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void main ()
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{
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int err;
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int listen_sd;
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int sd;
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struct sockaddr_in sa_serv;
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struct sockaddr_in sa_cli;
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int client_len;
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SSL_CTX* ctx;
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SSL* ssl;
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X509* client_cert;
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char* str;
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char buf [4096];
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/* SSL preliminaries. We keep the certificate and key with the context. */
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SSL_load_error_strings();
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ctx = SSL_CTX_new (); CHK_NULL(ctx);
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err = SSL_CTX_use_RSAPrivateKey_file (ctx, KEYF, SSL_FILETYPE_PEM);
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CHK_SSL(err);
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err = SSL_CTX_use_certificate_file (ctx, CERTF, SSL_FILETYPE_PEM);
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CHK_SSL(err);
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/* ----------------------------------------------- */
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/* Prepare TCP socket for receiving connections */
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listen_sd = socket (AF_INET, SOCK_STREAM, 0); CHK_ERR(listen_sd, "socket");
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memset (&sa_serv, '\0', sizeof(sa_serv));
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sa_serv.sin_family = AF_INET;
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sa_serv.sin_addr.s_addr = INADDR_ANY;
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sa_serv.sin_port = htons (1111); /* Server Port number */
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err = bind(listen_sd, (struct sockaddr*) &sa_serv,
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sizeof (sa_serv)); CHK_ERR(err, "bind");
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/* Receive a TCP connection. */
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err = listen (listen_sd, 5); CHK_ERR(err, "listen");
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client_len = sizeof(sa_cli);
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sd = accept (listen_sd, (struct sockaddr*) &sa_cli, &client_len);
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CHK_ERR(sd, "accept");
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close (listen_sd);
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printf ("Connection from %lx, port %x\n",
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sa_cli.sin_addr.s_addr, sa_cli.sin_port);
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/* ----------------------------------------------- */
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/* TCP connection is ready. Do server side SSL. */
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ssl = SSL_new (ctx); CHK_NULL(ssl);
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SSL_set_fd (ssl, sd);
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err = SSL_accept (ssl); CHK_SSL(err);
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/* Get the cipher - opt */
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printf ("SSL connection using %s\n", SSL_get_cipher (ssl));
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/* Get client's certificate (note: beware of dynamic allocation) - opt */
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client_cert = SSL_get_peer_certificate (ssl);
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if (client_cert != NULL) {
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printf ("Client certificate:\n");
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str = X509_NAME_oneline (X509_get_subject_name (client_cert));
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CHK_NULL(str);
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printf ("\t subject: %s\n", str);
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Free (str);
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str = X509_NAME_oneline (X509_get_issuer_name (client_cert));
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CHK_NULL(str);
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printf ("\t issuer: %s\n", str);
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Free (str);
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/* We could do all sorts of certificate verification stuff here before
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deallocating the certificate. */
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X509_free (client_cert);
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} else
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printf ("Client does not have certificate.\n");
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/* DATA EXCHANGE - Receive message and send reply. */
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err = SSL_read (ssl, buf, sizeof(buf) - 1); CHK_SSL(err);
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buf[err] = '\0';
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printf ("Got %d chars:'%s'\n", err, buf);
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err = SSL_write (ssl, "I hear you.", strlen("I hear you.")); CHK_SSL(err);
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/* Clean up. */
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close (sd);
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SSL_free (ssl);
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SSL_CTX_free (ctx);
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}
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/* EOF - serv.cpp */
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