/* apps/crl2p7.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * 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 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.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 OR CONTRIBUTORS 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.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/* This was written by Gordon Chaffee <chaffee@plateau.cs.berkeley.edu>

 * and donated 'to the cause' along with lots and lots of other fixes to

 * the library. */

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include <sys/stat.h>

#include "apps.h"

#include <openssl/err.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/pkcs7.h>

#include <openssl/pem.h>

#include <openssl/objects.h>

static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);

#undef PROG

#define PROG	crl2pkcs7_main

/* -inform arg	- input format - default PEM (DER or PEM)

 * -outform arg - output format - default PEM

 * -in arg	- input file - default stdin

 * -out arg	- output file - default stdout

 */

int MAIN(int, char **);

int MAIN(int argc, char **argv)

	{

	int i,badops=0;

	BIO *in=NULL,*out=NULL;

	int informat,outformat;

	char *infile,*outfile,*prog,*certfile;

	PKCS7 *p7 = NULL;

	PKCS7_SIGNED *p7s = NULL;

	X509_CRL *crl=NULL;

	STACK *certflst=NULL;

	STACK_OF(X509_CRL) *crl_stack=NULL;

	STACK_OF(X509) *cert_stack=NULL;

	int ret=1,nocrl=0;

	apps_startup();

	if (bio_err == NULL)

		if ((bio_err=BIO_new(BIO_s_file())) != NULL)

			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

	infile=NULL;

	outfile=NULL;

	informat=FORMAT_PEM;

	outformat=FORMAT_PEM;

	prog=argv[0];

	argc--;

	argv++;

	while (argc >= 1)

		{

		if 	(strcmp(*argv,"-inform") == 0)

			{

			if (--argc < 1) goto bad;

			informat=str2fmt(*(++argv));

			}

		else if (strcmp(*argv,"-outform") == 0)

			{

			if (--argc < 1) goto bad;

			outformat=str2fmt(*(++argv));

			}

		else if (strcmp(*argv,"-in") == 0)

			{

			if (--argc < 1) goto bad;

			infile= *(++argv);

			}

		else if (strcmp(*argv,"-nocrl") == 0)

			{

			nocrl=1;

			}

		else if (strcmp(*argv,"-out") == 0)

			{

			if (--argc < 1) goto bad;

			outfile= *(++argv);

			}

		else if (strcmp(*argv,"-certfile") == 0)

			{

			if (--argc < 1) goto bad;

			if(!certflst) certflst = sk_new_null();

			sk_push(certflst,*(++argv));

			}

		else

			{

			BIO_printf(bio_err,"unknown option %s\n",*argv);

			badops=1;

			break;

			}

		argc--;

		argv++;

		}

	if (badops)

		{

bad:

		BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);

		BIO_printf(bio_err,"where options are\n");

		BIO_printf(bio_err," -inform arg    input format - DER or PEM\n");

		BIO_printf(bio_err," -outform arg   output format - DER or PEM\n");

		BIO_printf(bio_err," -in arg        input file\n");

		BIO_printf(bio_err," -out arg       output file\n");

		BIO_printf(bio_err," -certfile arg  certificates file of chain to a trusted CA\n");

		BIO_printf(bio_err,"                (can be used more than once)\n");

		BIO_printf(bio_err," -nocrl         no crl to load, just certs from '-certfile'\n");

		ret = 1;

		goto end;

		}

	ERR_load_crypto_strings();

	in=BIO_new(BIO_s_file());

	out=BIO_new(BIO_s_file());

	if ((in == NULL) || (out == NULL))

		{

		ERR_print_errors(bio_err);

		goto end;

		}

	if (!nocrl)

		{

		if (infile == NULL)

			BIO_set_fp(in,stdin,BIO_NOCLOSE);

		else

			{

			if (BIO_read_filename(in,infile) <= 0)

				{

				perror(infile);

				goto end;

				}

			}

		if 	(informat == FORMAT_ASN1)

			crl=d2i_X509_CRL_bio(in,NULL);

		else if (informat == FORMAT_PEM)

			crl=PEM_read_bio_X509_CRL(in,NULL,NULL,NULL);

		else	{

			BIO_printf(bio_err,"bad input format specified for input crl\n");

			goto end;

			}

		if (crl == NULL)

			{

			BIO_printf(bio_err,"unable to load CRL\n");

			ERR_print_errors(bio_err);

			goto end;

			}

		}

	if ((p7=PKCS7_new()) == NULL) goto end;

	if ((p7s=PKCS7_SIGNED_new()) == NULL) goto end;

	p7->type=OBJ_nid2obj(NID_pkcs7_signed);

	p7->d.sign=p7s;

	p7s->contents->type=OBJ_nid2obj(NID_pkcs7_data);

	if (!ASN1_INTEGER_set(p7s->version,1)) goto end;

	if ((crl_stack=sk_X509_CRL_new_null()) == NULL) goto end;

	p7s->crl=crl_stack;

	if (crl != NULL)

		{

		sk_X509_CRL_push(crl_stack,crl);

		crl=NULL; /* now part of p7 for OPENSSL_freeing */

		}

	if ((cert_stack=sk_X509_new_null()) == NULL) goto end;

	p7s->cert=cert_stack;

	if(certflst) for(i = 0; i < sk_num(certflst); i++) {

		certfile = sk_value(certflst, i);

		if (add_certs_from_file(cert_stack,certfile) < 0)

			{

			BIO_printf(bio_err, "error loading certificates\n");

			ERR_print_errors(bio_err);

			goto end;

			}

	}

	sk_free(certflst);

	if (outfile == NULL)

		{

		BIO_set_fp(out,stdout,BIO_NOCLOSE);

#ifdef OPENSSL_SYS_VMS

		{

		BIO *tmpbio = BIO_new(BIO_f_linebuffer());

		out = BIO_push(tmpbio, out);

		}

#endif

		}

	else

		{

		if (BIO_write_filename(out,outfile) <= 0)

			{

			perror(outfile);

			goto end;

			}

		}

	if 	(outformat == FORMAT_ASN1)

		i=i2d_PKCS7_bio(out,p7);

	else if (outformat == FORMAT_PEM)

		i=PEM_write_bio_PKCS7(out,p7);

	else	{

		BIO_printf(bio_err,"bad output format specified for outfile\n");

		goto end;

		}

	if (!i)

		{

		BIO_printf(bio_err,"unable to write pkcs7 object\n");

		ERR_print_errors(bio_err);

		goto end;

		}

	ret=0;

end:

	if (in != NULL) BIO_free(in);

	if (out != NULL) BIO_free_all(out);

	if (p7 != NULL) PKCS7_free(p7);

	if (crl != NULL) X509_CRL_free(crl);

	apps_shutdown();

	OPENSSL_EXIT(ret);

	}

/*

 *----------------------------------------------------------------------

 * int add_certs_from_file

 *

 *	Read a list of certificates to be checked from a file.

 *

 * Results:

 *	number of certs added if successful, -1 if not.

 *----------------------------------------------------------------------

 */

static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)

	{

	struct stat st;

	BIO *in=NULL;

	int count=0;

	int ret= -1;

	STACK_OF(X509_INFO) *sk=NULL;

	X509_INFO *xi;

	if ((stat(certfile,&st) != 0))

		{

		BIO_printf(bio_err,"unable to load the file, %s\n",certfile);

		goto end;

		}

	in=BIO_new(BIO_s_file());

	if ((in == NULL) || (BIO_read_filename(in,certfile) <= 0))

		{

		BIO_printf(bio_err,"error opening the file, %s\n",certfile);

		goto end;

		}

	/* This loads from a file, a stack of x509/crl/pkey sets */

	sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL);

	if (sk == NULL) {

		BIO_printf(bio_err,"error reading the file, %s\n",certfile);

		goto end;

	}

	/* scan over it and pull out the CRL's */

	while (sk_X509_INFO_num(sk))

		{

		xi=sk_X509_INFO_shift(sk);

		if (xi->x509 != NULL)

			{

			sk_X509_push(stack,xi->x509);

			xi->x509=NULL;

			count++;

			}

		X509_INFO_free(xi);

		}

	ret=count;

end:

 	/* never need to OPENSSL_free x */

	if (in != NULL) BIO_free(in);

	if (sk != NULL) sk_X509_INFO_free(sk);

	return(ret);

	}