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/*
* crypt.c --
*
* Implements the 'crypt' and 'md5crypt' commands.
*
*
* Copyright (c) 1996 Andreas Kupries (andreas_kupries@users.sourceforge.net)
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL I LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
* INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS
* SOFTWARE AND ITS DOCUMENTATION, EVEN IF I HAVE BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* I SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND
* I HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
* ENHANCEMENTS, OR MODIFICATIONS.
*
* CVS: $Id: crypt.c,v 1.7 2000/11/18 22:42:31 aku Exp $
*/
#include <crypt.h>
#include "loadman.h"
static int
TrfCryptObjCmd _ANSI_ARGS_ ((ClientData notUsed, Tcl_Interp* interp,
int objc, struct Tcl_Obj* CONST * objv));
static int
TrfMd5CryptObjCmd _ANSI_ARGS_ ((ClientData notUsed, Tcl_Interp* interp,
int objc, struct Tcl_Obj* CONST * objv));
/*
*----------------------------------------------------------------------
*
* TrfCryptObjCmd --
*
* This procedure is invoked to process the "crypt" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
TrfCryptObjCmd (notUsed, interp, objc, objv)
ClientData notUsed; /* Not used. */
Tcl_Interp* interp; /* Current interpreter. */
int objc; /* Number of arguments. */
struct Tcl_Obj* CONST * objv; /* Argument strings. */
{
/*
* crypt <passwd> <salt>
*/
#ifdef __WIN32__
Tcl_SetObjResult (interp, Tcl_NewStringObj ("crypt is not available under Windows", -1));
return TCL_ERROR;
#else
const char* passwd;
const char* salt;
char salt_b [3];
Tcl_Obj* res;
if (objc != 3) {
Tcl_AppendResult (interp,
"wrong # args: should be \"crypt passwd salt\"",
(char*) NULL);
return TCL_ERROR;
}
passwd = Tcl_GetStringFromObj (objv [1], NULL);
salt = Tcl_GetStringFromObj (objv [2], NULL);
/* 1) We need only the first two bytes of salt;
* 2) Avoiding use of md5_crypt if salt starts with $1$ (as in glibc) */
salt_b [0] = salt [0];
salt_b [1] = salt [1];
salt_b [2] = '\0';
/* THREADING: Serialize access to result string of 'crypt'.
*/
TrfLock;
res = Tcl_NewStringObj ((char*) crypt (passwd, salt_b), -1);
TrfUnlock;
Tcl_SetObjResult (interp, res);
return TCL_OK;
#endif
}
/*
*----------------------------------------------------------------------
*
* TrfMd5CryptObjCmd --
*
* This procedure is invoked to process the "md5crypt" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* Unstacks the channel, thereby restoring its parent.
*
*----------------------------------------------------------------------
*/
static int
TrfMd5CryptObjCmd (notUsed, interp, objc, objv)
ClientData notUsed; /* Not used. */
Tcl_Interp* interp; /* Current interpreter. */
int objc; /* Number of arguments. */
struct Tcl_Obj* CONST * objv; /* Argument strings. */
{
/*
* md5crypt <passwd> <salt>
*/
const char* passwd;
const char* salt;
char salt_b [12];
Tcl_Obj* res;
if (TrfLoadMD5 (interp) != TCL_OK) {
return TCL_ERROR;
}
if (objc != 3) {
Tcl_AppendResult (interp,
"wrong # args: should be \"md5crypt passwd salt\"",
(char*) NULL);
return TCL_ERROR;
}
passwd = Tcl_GetStringFromObj (objv [1], NULL);
salt = Tcl_GetStringFromObj (objv [2], NULL);
/*
* Manipulate salt, add magic md5 prefix '$1$'.
* The 'crypt +3' later on skips the first three characters of the result,
* which again contain the magic marker.
*/
salt_b [0] = '$';
salt_b [1] = '1';
salt_b [2] = '$';
salt_b [3] = salt [0];
salt_b [4] = salt [1];
salt_b [5] = salt [2];
salt_b [6] = salt [3];
salt_b [7] = salt [4];
salt_b [8] = salt [5];
salt_b [9] = salt [6];
salt_b [10] = salt [7];
salt_b [11] = '\0';
/* THREADING: Serialize access to result string of 'md5f.crypt'.
*/
TrfLock;
res = Tcl_NewStringObj ((char*) md5f.crypt (passwd, salt_b), -1);
TrfUnlock;
Tcl_SetObjResult (interp, res);
return TCL_OK;
}
/*
*------------------------------------------------------*
*
* TrfInit_Crypt --
*
* ------------------------------------------------*
* Register the 'crypt' and 'md5crypt' commands.
* ------------------------------------------------*
*
* Sideeffects:
* As of 'Tcl_CreateObjCommand'.
*
* Result:
* A standard Tcl error code.
*
*------------------------------------------------------*
*/
int
TrfInit_Crypt (interp)
Tcl_Interp* interp;
{
Tcl_CreateObjCommand (interp, "crypt", TrfCryptObjCmd,
(ClientData) NULL,
(Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand (interp, "md5crypt", TrfMd5CryptObjCmd,
(ClientData) NULL,
(Tcl_CmdDeleteProc *) NULL);
return TCL_OK;
}
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