111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
|
/* cli.cpp - Minimal ssleay client for Unix
|
||
|
|
30.9.1996, Sampo Kellomaki <sampo@iki.fi> */
|
||
|
|
|
||
|
|
/* 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 <wades@mail.cybg.com> */
|
||
|
|
|
||
|
|
#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 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;
|
||
|
|
|
||
|
|
SSLeay_add_ssl_algorithms();
|
||
|
|
meth = SSLv2_client_method();
|
||
|
|
SSL_load_error_strings();
|
||
|
|
ctx = SSL_CTX_new (meth); CHK_NULL(ctx);
|
||
|
|
|
||
|
|
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");
|
||
|
|
|
||
|
|
/* ----------------------------------------------- */
|
||
|
|
/* 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);
|
||
|
|
OPENSSL_free (str);
|
||
|
|
|
||
|
|
str = X509_NAME_oneline (X509_get_issuer_name (server_cert),0,0);
|
||
|
|
CHK_NULL(str);
|
||
|
|
printf ("\t issuer: %s\n", str);
|
||
|
|
OPENSSL_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 */
|