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Oracle Solaris Security for Developers Guide
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Document Information


1.  Oracle Solaris Security for Developers (Overview)

2.  Developing Privileged Applications

3.  Writing PAM Applications and Services

4.  Writing Applications That Use GSS-API

5.  GSS-API Client Example

GSSAPI Client Example Overview

GSSAPI Client Example Structure

Running the GSSAPI Client Example

GSSAPI Client Example: main() Function

Opening a Connection With the Server

Establishing a Security Context With the Server

Translating a Service Name into GSS-API Format

Establishing a Security Context for GSS-API

Miscellaneous GSSAPI Context Operations on the Client Side

Wrapping and Sending a Message

Reading and Verifying a Signature Block From a GSS-API Client

Deleting the Security Context

6.  GSS-API Server Example

7.  Writing Applications That Use SASL

8.  Introduction to the Oracle Solaris Cryptographic Framework

9.  Writing User-Level Cryptographic Applications and Providers

10.  Using the Smart Card Framework

A.  Sample C-Based GSS-API Programs

B.  GSS-API Reference

C.  Specifying an OID

D.  Source Code for SASL Example

E.  SASL Reference Tables

F.  Packaging and Signing Cryptographic Providers



Opening a Connection With the Server

The call_server() function uses the following code to make the connection with the server:

     if ((s = connect_to_server(host, port)) < 0)
          return -1;

s is a file descriptor, the int that is initially returned by a call to socket().

connect_to_server() is a simple function outside GSS-API that uses sockets to create a connection. The source code for connect_to_server() is shown in the following example.

Note - The source code for this example is also available through the Sun download center. See

Example 5-2 connect_to_server() Function

int connect_to_server(host, port)
     char *host;
     u_short port;
     struct sockaddr_in saddr;
     struct hostent *hp;
     int s;
     if ((hp = gethostbyname(host)) == NULL) {
          fprintf(stderr, "Unknown host: %s\n", host);
          return -1;

     saddr.sin_family = hp->h_addrtype;
     memcpy((char *)&saddr.sin_addr, hp->h_addr, sizeof(saddr.sin_addr));
     saddr.sin_port = htons(port);

     if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
          perror("creating socket");
          return -1;
     if (connect(s, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) {
          perror("connecting to server");
          (void) close(s);
          return -1;

     return s;