/* 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);

 	}