Help Required

["Shalendra Chhabra" <shalu_itbhu@rediffmail.com>]

[-- Attachment #1: Type: text/plain, Size: 2101 bytes --]

I am sorry I am not able to debug these errors as I am facing 
these for the first time and also I have a little experience with 
Programing, When I compile a code from
demo files of Openssl,
cli.cpp
I get the following errors

/tmp/ccgN1DUz.o: In function `main':
/tmp/ccgN1DUz.o(.text+0xa): undefined reference to 
`SSL_library_init'
/tmp/ccgN1DUz.o(.text+0xf): undefined reference to 
`SSLv2_client_method'
/tmp/ccgN1DUz.o(.text+0x1c): undefined reference to 
`SSL_load_error_strings'
/tmp/ccgN1DUz.o(.text+0x2b): undefined reference to 
`SSL_CTX_new'
/tmp/ccgN1DUz.o(.text+0x60): undefined reference to 
`ERR_print_errors_fp'
/tmp/ccgN1DUz.o(.text+0x139): undefined reference to `SSL_new'
/tmp/ccgN1DUz.o(.text+0x164): undefined reference to 
`SSL_set_fd'
/tmp/ccgN1DUz.o(.text+0x173): undefined reference to 
`SSL_connect'
/tmp/ccgN1DUz.o(.text+0x18f): undefined reference to 
`ERR_print_errors_fp'
/tmp/ccgN1DUz.o(.text+0x1b1): undefined reference to 
`SSL_get_current_cipher'
/tmp/ccgN1DUz.o(.text+0x1bc): undefined reference to 
`SSL_CIPHER_get_name'
/tmp/ccgN1DUz.o(.text+0x1f3): undefined reference to `SSL_write'
/tmp/ccgN1DUz.o(.text+0x20f): undefined reference to 
`ERR_print_errors_fp'
/tmp/ccgN1DUz.o(.text+0x237): undefined reference to `SSL_read'
/tmp/ccgN1DUz.o(.text+0x253): undefined reference to 
`ERR_print_errors_fp'
/tmp/ccgN1DUz.o(.text+0x297): undefined reference to 
`SSL_shutdown'
/tmp/ccgN1DUz.o(.text+0x2b5): undefined reference to `SSL_free'
/tmp/ccgN1DUz.o(.text+0x2c4): undefined reference to 
`SSL_CTX_free'
collect2: ld returned 1 exit status

The code is here as an attachment. I would be grateful if someone 
helps me, I still have problem with serv.cpp and inetdserv.cpp but 
I will try to debug them myself.

2. It would be of great help if someone can tell me a link where I 
can learn how to write applications using Openssl Library.

Thank You very much,
Yours Sincerely
Shalendra (Student)
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[-- Attachment #2: cli.cpp --]
[-- Type: application/octet-stream, Size: 2482 bytes --]

/* 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>
# include <unistd.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));
  
  /* 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 */