NotesWhat is notes.io?

Notes brand slogan

Notes - notes.io

#include <errno.h>
#include <unistd.h>
#include <malloc.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <resolv.h>
#include "openssl/ssl.h"
#include "openssl/err.h"
#define FAIL -1
// Create the SSL socket and intialize the socket address structure
int OpenListener(int port)
{
int sd;
struct sockaddr_in addr;
sd = socket(PF_INET, SOCK_STREAM, 0);
bzero(&addr, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 )
{
perror("can't bind port");
abort();
}
if ( listen(sd, 10) != 0 )
{
perror("Can't configure listening port");
abort();
}
return sd;
}
int isRoot()
{
if (getuid() != 0)
{
return 0;
}
else
{
return 1;
}
}
SSL_CTX* InitServerCTX(void)
{
SSL_METHOD *method;
SSL_CTX *ctx;
OpenSSL_add_all_algorithms(); /* load & register all cryptos, etc. */
SSL_load_error_strings(); /* load all error messages */
method = TLSv1_2_server_method(); /* create new server-method instance */
ctx = SSL_CTX_new(method); /* create new context from method */
if ( ctx == NULL )
{
ERR_print_errors_fp(stderr);
abort();
}
return ctx;
}
void LoadCertificates(SSL_CTX* ctx, char* CertFile, char* KeyFile)
{
/* set the local certificate from CertFile */
if ( SSL_CTX_use_certificate_file(ctx, CertFile, SSL_FILETYPE_PEM) <= 0 )
{
ERR_print_errors_fp(stderr);
abort();
}
/* set the private key from KeyFile (may be the same as CertFile) */
if ( SSL_CTX_use_PrivateKey_file(ctx, KeyFile, SSL_FILETYPE_PEM) <= 0 )
{
ERR_print_errors_fp(stderr);
abort();
}
/* verify private key */
if ( !SSL_CTX_check_private_key(ctx) )
{
fprintf(stderr, "Private key does not match the public certificaten");
abort();
}
}
void ShowCerts(SSL* ssl)
{
X509 *cert;
char *line;
cert = SSL_get_peer_certificate(ssl); /* Get certificates (if available) */
if ( cert != NULL )
{
printf("Server certificates:n");
line = X509_NAME_oneline(X509_get_subject_name(cert), 0, 0);
printf("Subject: %sn", line);
free(line);
line = X509_NAME_oneline(X509_get_issuer_name(cert), 0, 0);
printf("Issuer: %sn", line);
free(line);
X509_free(cert);
}
else
printf("No certificates.n");
}
void Servlet(SSL* ssl) /* Serve the connection -- threadable */
{
char buf[1024] = {0};
int sd, bytes;
const char* ServerResponse="<Body>
<Name>aticleworld.com</Name>
<year>1.5</year>
<BlogType>Embedede and cc++<BlogType>
<Author>amlendra<Author>
<Body>";
const char *cpValidMessage = "<Body>
<UserName>aticle<UserName>
<Password>123<Password>
<Body>";
if ( SSL_accept(ssl) == FAIL ) /* do SSL-protocol accept */
ERR_print_errors_fp(stderr);
else
{
ShowCerts(ssl); /* get any certificates */
bytes = SSL_read(ssl, buf, sizeof(buf)); /* get request */
buf[bytes] = '';
printf("Client msg: "%s"n", buf);
if ( bytes > 0 )
{
if(strcmp(cpValidMessage,buf) == 0)
{
SSL_write(ssl, ServerResponse, strlen(ServerResponse)); /* send reply */
}
else
{
SSL_write(ssl, "Invalid Message", strlen("Invalid Message")); /* send reply */
}
}
else
{
ERR_print_errors_fp(stderr);
}
}
sd = SSL_get_fd(ssl); /* get socket connection */
SSL_free(ssl); /* release SSL state */
close(sd); /* close connection */
}
int main(int count, char *Argc[])
{
SSL_CTX *ctx;
int server;
char *portnum;
//Only root user have the permsion to run the server
if(!isRoot())
{
printf("This program must be run as root/sudo user!!");
exit(0);
}
if ( count != 2 )
{
printf("Usage: %s <portnum>n", Argc[0]);
exit(0);
}
// Initialize the SSL library
SSL_library_init();
portnum = Argc[1];
ctx = InitServerCTX(); /* initialize SSL */
LoadCertificates(ctx, "mycert.pem", "mycert.pem"); /* load certs */
server = OpenListener(atoi(portnum)); /* create server socket */
while (1)
{
struct sockaddr_in addr;
socklen_t len = sizeof(addr);
SSL *ssl;
int client = accept(server, (struct sockaddr*)&addr, &len); /* accept connection as usual */
printf("Connection: %s:%dn",inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
ssl = SSL_new(ctx); /* get new SSL state with context */
SSL_set_fd(ssl, client); /* set connection socket to SSL state */
Servlet(ssl); /* service connection */
}
close(server); /* close server socket */
SSL_CTX_free(ctx); /* release context */
}
     
 
what is notes.io
 

Notes.io is a web-based application for taking notes. You can take your notes and share with others people. If you like taking long notes, notes.io is designed for you. To date, over 8,000,000,000 notes created and continuing...

With notes.io;

  • * You can take a note from anywhere and any device with internet connection.
  • * You can share the notes in social platforms (YouTube, Facebook, Twitter, instagram etc.).
  • * You can quickly share your contents without website, blog and e-mail.
  • * You don't need to create any Account to share a note. As you wish you can use quick, easy and best shortened notes with sms, websites, e-mail, or messaging services (WhatsApp, iMessage, Telegram, Signal).
  • * Notes.io has fabulous infrastructure design for a short link and allows you to share the note as an easy and understandable link.

Fast: Notes.io is built for speed and performance. You can take a notes quickly and browse your archive.

Easy: Notes.io doesn’t require installation. Just write and share note!

Short: Notes.io’s url just 8 character. You’ll get shorten link of your note when you want to share. (Ex: notes.io/q )

Free: Notes.io works for 12 years and has been free since the day it was started.


You immediately create your first note and start sharing with the ones you wish. If you want to contact us, you can use the following communication channels;


Email: [email protected]

Twitter: http://twitter.com/notesio

Instagram: http://instagram.com/notes.io

Facebook: http://facebook.com/notesio



Regards;
Notes.io Team

     
 
Shortened Note Link
 
 
Looding Image
 
     
 
Long File
 
 

For written notes was greater than 18KB Unable to shorten.

To be smaller than 18KB, please organize your notes, or sign in.