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/*
* Copyright 1994 by OpenVision Technologies, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of OpenVision not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. OpenVision makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "gss.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
/*+
* Function: send_token
*
* Purpose: Writes a token to a file descriptor.
*
* Arguments:
*
* s (r) an open file descriptor
* tok (r) the token to write
*
* Returns: 0 on success, -1 on failure
*
* Effects:
*
* send_token writes the token length (as a network long) and then the
* token data to the file descriptor s. It returns 0 on success, and
* -1 if an error occurs or if it could not write all the data.
*/
int send_token(int s, gss_buffer_t tok) {
long len;
size_t ret;
len = htonl(tok->length);
ret = send (s, (char *) &len, 4, 0); // Send length over the socket
if (ret < 0) {
errno = WSAGetLastError();
my_perror("sending token length");
return -1;
} else if (ret != 4) {
OkMsgBox ("sending token length: %d of %d bytes written\n",
ret, 4);
return -1;
}
ret = send (s, tok->value, tok->length, 0); // Send the data
if (ret < 0) {
errno = WSAGetLastError();
my_perror("sending token data");
return -1;
} else if (ret != tok->length) {
OkMsgBox ("sending token data: %d of %d bytes written\n",
ret, tok->length);
return -1;
}
return 0;
}
/*+
* Function: recv_token
*
* Purpose: Reads a token from a file descriptor.
*
* Arguments:
*
* s (r) an open file descriptor
* tok (w) the read token
*
* Returns: 0 on success, -1 on failure
*
* Effects:
*
* recv_token reads the token length (as a network long), allocates
* memory to hold the data, and then reads the token data from the
* file descriptor s. It blocks to read the length and data, if
* necessary. On a successful return, the token should be freed with
* gss_release_buffer. It returns 0 on success, and -1 if an error
* occurs or if it could not read all the data.
*/
int
recv_token (int s, gss_buffer_t tok) {
int ret;
unsigned long len;
ret = recv (s, (char *) &len, 4, 0);
if (ret < 0) {
errno = WSAGetLastError();
my_perror("reading token length");
return -1;
} else if (ret != 4) {
OkMsgBox ("reading token length: %d of %d bytes read\n",
ret, 4);
return -1;
}
len = ntohl(len);
tok->length = (size_t) len;
tok->value = (char *) malloc(tok->length);
if (tok->value == NULL) {
OkMsgBox ("Out of memory allocating token data\n");
return -1;
}
ret = recv (s, (char *) tok->value, tok->length, 0);
if (ret < 0) {
errno = WSAGetLastError();
my_perror("reading token data");
free(tok->value);
return -1;
} else if ((size_t) ret != tok->length) {
OkMsgBox ("sending token data: %d of %d bytes written\n",
ret, tok->length);
free(tok->value);
return -1;
}
return 0;
}
/*+
* Function: display_status
*
* Purpose: displays GSS-API messages
*
* Arguments:
*
* msg a string to be displayed with the message
* maj_stat the GSS-API major status code
* min_stat the GSS-API minor status code
*
* Effects:
*
* The GSS-API messages associated with maj_stat and min_stat are
* displayed on stderr, each preceeded by "GSS-API error <msg>: " and
* followed by a newline.
*/
void
display_status (char *msg, OM_uint32 maj_stat, OM_uint32 min_stat) {
display_status_1(msg, maj_stat, GSS_C_GSS_CODE);
display_status_1(msg, min_stat, GSS_C_MECH_CODE);
}
static void
display_status_1(char *m, OM_uint32 code, int type) {
OM_uint32 maj_stat, min_stat;
gss_buffer_desc msg;
OM_uint32 msg_ctx;
msg_ctx = 0;
while (1) {
maj_stat = gss_display_status(&min_stat, code,
type, GSS_C_NULL_OID,
&msg_ctx, &msg);
OkMsgBox ("GSS-API error %s: %s\n", m,
(char *)msg.value);
(void) gss_release_buffer(&min_stat, &msg);
if (!msg_ctx)
break;
}
}
/*+*************************************************************************
**
** OkMsgBox
**
** A MessageBox version of printf
**
***************************************************************************/
void
OkMsgBox (char *format, ...) {
char buf[256]; // Message goes into here
char *args; // Args for printf
args = (char *) &format + sizeof(format);
vsprintf (buf, format, args);
MessageBox(NULL, buf, "", MB_OK);
}
/*+*************************************************************************
**
** My_perror
**
** A windows conversion of perror displaying the output into a MessageBox.
**
***************************************************************************/
void
my_perror (char *msg) {
char *err;
err = strerror (errno);
if (msg && *msg != '\0')
OkMsgBox ("%s: %s", msg, err);
else
MessageBox (NULL, err, "", MB_OK);
}
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