/*
 * Copyright (C) 2009  Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE
 * FOR ANY SPECIAL, DIRECT, 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.
 */

/*
 * Portions copyright (c) 2008 Nominet UK.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* $Id: pkcs11-destroy.c,v 1.8 2010-01-13 21:19:52 fdupont Exp $ */

/* pkcs11-destroy [-m module] [-s $slot] [-i $id | -l $label] [-p $pin] */

/*! \file */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include "cryptoki.h"

#ifdef WIN32
#define sleep(x)	Sleep(x)
#include "win32.c"
#else
#ifndef FORCE_STATIC_PROVIDER
#include "unix.c"
#endif
#endif

#if !(defined(HAVE_GETPASSPHRASE) || (defined (__SVR4) && defined (__sun)))
#define getpassphrase(x)	getpass(x)
#endif

int
main(int argc, char *argv[])
{
	CK_RV rv;
	CK_SLOT_ID slot = 0;
	CK_SESSION_HANDLE hSession;
	CK_UTF8CHAR *pin = NULL;
	CK_BYTE attr_id[2];
	CK_OBJECT_HANDLE akey[50];
	char *label = NULL;
	int error = 0;
	unsigned int id = 0, i = 0;
	int c, errflg = 0;
	CK_ULONG ulObjectCount;
	CK_ATTRIBUTE search_template[] = {
		{CKA_ID, &attr_id, sizeof(attr_id)}
	};
	char *pk11_provider;
	unsigned int j, len;
	extern char *optarg;
	extern int optopt;

	pk11_provider = getenv("PKCS11_PROVIDER");
	if (pk11_provider != NULL)
		pk11_libname = pk11_provider;

	while ((c = getopt(argc, argv, ":m:s:i:l:p:")) != -1) {
		switch (c) {
		case 'm':
			pk11_libname = optarg;
			break;
		case 's':
			slot = atoi(optarg);
			break;
		case 'i':
			id = atoi(optarg);
			id &= 0xffff;
			break;
		case 'l':
			label = optarg;
			break;
		case 'p':
			pin = (CK_UTF8CHAR *)optarg;
			break;
		case ':':
			fprintf(stderr,
				"Option -%c requires an operand\n",
				optopt);
			errflg++;
			break;
		case '?':
		default:
			fprintf(stderr, "Unrecognised option: -%c\n", optopt);
			errflg++;
		}
	}

	if (errflg || (id && (label != NULL))) {
		fprintf(stderr, "Usage:\n");
		fprintf(stderr, "\tpkcs11-destroy [-m module] [-s slot] "
				"[-i id | -l label] [-p pin]\n");
		exit(1);
	}

	if (id) {
		printf("id %i\n", id);
		attr_id[0] = (id >> 8) & 0xff;
		attr_id[1] = id & 0xff;
	} else if (label) {
		printf("label %s\n", label);
		search_template[0].type = CKA_LABEL;
		search_template[0].pValue = label;
		search_template[0].ulValueLen = strlen(label);
	}

	/* Initialize the CRYPTOKI library */
	rv = C_Initialize(NULL_PTR);
	if (rv != CKR_OK) {
		if (rv == 0xfe)
			fprintf(stderr,
				"Can't load or link module \"%s\"\n",
				pk11_libname);
		else
			fprintf(stderr, "C_Initialize: Error = 0x%.8lX\n", rv);
		exit(1);
	}

	/* Open a session on the slot found */
	rv = C_OpenSession(slot, CKF_RW_SESSION+CKF_SERIAL_SESSION,
			   NULL_PTR, NULL_PTR, &hSession);
	if (rv != CKR_OK) {
		fprintf(stderr, "C_OpenSession: Error = 0x%.8lX\n", rv);
		error = 1;
		goto exit_program;
	}

	if (pin == NULL)
		pin = (CK_UTF8CHAR *)getpassphrase("Enter Pin: ");

	/* Login to the Token (Keystore) */
	rv = C_Login(hSession, CKU_USER, pin, strlen((char *)pin));
	memset(pin, 0, strlen((char *)pin));
	if (rv != CKR_OK) {
		fprintf(stderr, "C_Login: Error = 0x%.8lX\n", rv);
		error = 1;
		goto exit_session;
	}

	rv = C_FindObjectsInit(hSession, search_template,
		   ((id != 0) || (label != NULL)) ? 1 : 0); 

	if (rv != CKR_OK) {
		fprintf(stderr, "C_FindObjectsInit: Error = 0x%.8lX\n", rv);
		error = 1;
		goto exit_session;
	}
	
	rv = C_FindObjects(hSession, akey, 50, &ulObjectCount);
	if (rv != CKR_OK) {
		fprintf(stderr, "C_FindObjects: Error = 0x%.8lX\n", rv);
		error = 1;
		goto exit_search;
	}

	for (i = 0; i < ulObjectCount; i++) {
		CK_OBJECT_CLASS oclass = 0;
		CK_BYTE labelbuf[64 + 1];
		CK_BYTE idbuf[64];
		CK_ATTRIBUTE attr_template[] = {
			{CKA_CLASS, &oclass, sizeof(oclass)},
			{CKA_LABEL, labelbuf, sizeof(labelbuf) - 1},
			{CKA_ID, idbuf, sizeof(idbuf)}
		};

		memset(labelbuf, 0, sizeof(labelbuf));
		memset(idbuf, 0, sizeof(idbuf));

		rv = C_GetAttributeValue(hSession, akey[i], attr_template, 3);
		if (rv != CKR_OK) {
			fprintf(stderr,
				"C_GetAttributeValue[%u]: rv = 0x%.8lX\n",
				i, rv);
			error = 1;
			goto exit_search;
		}
		len = attr_template[2].ulValueLen;
		printf("object[%u]: class %lu label '%s' id[%lu] ",
		       i, oclass, labelbuf, attr_template[2].ulValueLen);
		if (len > 4)
			len = 4;
		if (len > 0)
			printf("0x");
		for (j = 0; j < len; j++)
			printf("%02x", idbuf[j]);
		if (attr_template[2].ulValueLen > len)
			printf("...\n");
		else
			printf("\n");
	}

	/* give a chance to kill this */
	printf("sleeping 5 seconds...\n");
	sleep(5);

	for (i = 0; i < ulObjectCount; i++) {
		rv = C_DestroyObject(hSession, akey[i]);
		if (rv != CKR_OK) {
			fprintf(stderr,
				"C_DestroyObject[%u]: rv = 0x%.8lX\n",
				i, rv);
			error = 1;
		}
	}

 exit_search:
	rv = C_FindObjectsFinal(hSession);
	if (rv != CKR_OK) {
		fprintf(stderr, "C_FindObjectsFinal: Error = 0x%.8lX\n", rv);
		error = 1;
	}

 exit_session:
	(void)C_CloseSession(hSession);

 exit_program:
	(void)C_Finalize(NULL_PTR);

	exit(error);
}