/* apps/crl.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.]

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "apps.h"

#include <openssl/bio.h>

#include <openssl/err.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

#include <openssl/pem.h>

#undef PROG

#define PROG	crl_main

#undef POSTFIX

#define	POSTFIX	".rvk"

static const char *crl_usage[]={

"usage: crl args\n",

"\n",

" -inform arg     - input format - default PEM (DER or PEM)\n",

" -outform arg    - output format - default PEM\n",

" -text           - print out a text format version\n",

" -in arg         - input file - default stdin\n",

" -out arg        - output file - default stdout\n",

" -hash           - print hash value\n",

" -fingerprint    - print the crl fingerprint\n",

" -issuer         - print issuer DN\n",

" -lastupdate     - lastUpdate field\n",

" -nextupdate     - nextUpdate field\n",

" -noout          - no CRL output\n",

" -CAfile  name   - verify CRL using certificates in file \"name\"\n",

" -CApath  dir    - verify CRL using certificates in \"dir\"\n",

" -nameopt arg    - various certificate name options\n",

NULL

};

static X509_CRL *load_crl(char *file, int format);

static BIO *bio_out=NULL;

int MAIN(int, char **);

int MAIN(int argc, char **argv)

	{

	unsigned long nmflag = 0;

	X509_CRL *x=NULL;

	char *CAfile = NULL, *CApath = NULL;

	int ret=1,i,num,badops=0;

	BIO *out=NULL;

	int informat,outformat;

	char *infile=NULL,*outfile=NULL;

	int hash=0,issuer=0,lastupdate=0,nextupdate=0,noout=0,text=0;

	int fingerprint = 0;

	const char **pp;

	X509_STORE *store = NULL;

	X509_STORE_CTX ctx;

	X509_LOOKUP *lookup = NULL;

	X509_OBJECT xobj;

	EVP_PKEY *pkey;

	int do_ver = 0;

	const EVP_MD *md_alg,*digest=EVP_sha1();

	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);

	if (!load_config(bio_err, NULL))

		goto end;

	if (bio_out == NULL)

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

			{

			BIO_set_fp(bio_out,stdout,BIO_NOCLOSE);

#ifdef OPENSSL_SYS_VMS

			{

			BIO *tmpbio = BIO_new(BIO_f_linebuffer());

			bio_out = BIO_push(tmpbio, bio_out);

			}

#endif

			}

	informat=FORMAT_PEM;

	outformat=FORMAT_PEM;

	argc--;

	argv++;

	num=0;

	while (argc >= 1)

		{

#ifdef undef

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

			{

			if (--argc < 1) goto bad;

			if (!args_from_file(++argv,Nargc,Nargv)) { goto end; }*/

			}

#endif

		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,"-out") == 0)

			{

			if (--argc < 1) goto bad;

			outfile= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			CApath = *(++argv);

			do_ver = 1;

			}

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

			{

			if (--argc < 1) goto bad;

			CAfile = *(++argv);

			do_ver = 1;

			}

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

			do_ver = 1;

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

			text = 1;

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

			hash= ++num;

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

			{

			if (--argc < 1) goto bad;

			if (!set_name_ex(&nmflag, *(++argv))) goto bad;

			}

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

			issuer= ++num;

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

			lastupdate= ++num;

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

			nextupdate= ++num;

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

			noout= ++num;

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

			fingerprint= ++num;

		else if ((md_alg=EVP_get_digestbyname(*argv + 1)))

			{

			/* ok */

			digest=md_alg;

			}

		else

			{

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

			badops=1;

			break;

			}

		argc--;

		argv++;

		}

	if (badops)

		{

bad:

		for (pp=crl_usage; (*pp != NULL); pp++)

			BIO_printf(bio_err,"%s",*pp);

		goto end;

		}

	ERR_load_crypto_strings();

	x=load_crl(infile,informat);

	if (x == NULL) { goto end; }

	if(do_ver) {

		store = X509_STORE_new();

		lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file());

		if (lookup == NULL) goto end;

		if (!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM))

			X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);

		lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());

		if (lookup == NULL) goto end;

		if (!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM))

			X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);

		ERR_clear_error();

		if(!X509_STORE_CTX_init(&ctx, store, NULL, NULL)) {

			BIO_printf(bio_err,

				"Error initialising X509 store\n");

			goto end;

		}

		i = X509_STORE_get_by_subject(&ctx, X509_LU_X509, 

					X509_CRL_get_issuer(x), &xobj);

		if(i <= 0) {

			BIO_printf(bio_err,

				"Error getting CRL issuer certificate\n");

			goto end;

		}

		pkey = X509_get_pubkey(xobj.data.x509);

		X509_OBJECT_free_contents(&xobj);

		if(!pkey) {

			BIO_printf(bio_err,

				"Error getting CRL issuer public key\n");

			goto end;

		}

		i = X509_CRL_verify(x, pkey);

		EVP_PKEY_free(pkey);

		if(i < 0) goto end;

		if(i == 0) BIO_printf(bio_err, "verify failure\n");

		else BIO_printf(bio_err, "verify OK\n");

	}

	if (num)

		{

		for (i=1; i<=num; i++)

			{

			if (issuer == i)

				{

				print_name(bio_out, "issuer=", X509_CRL_get_issuer(x), nmflag);

				}

			if (hash == i)

				{

				BIO_printf(bio_out,"%08lx\n",

					X509_NAME_hash(X509_CRL_get_issuer(x)));

				}

			if (lastupdate == i)

				{

				BIO_printf(bio_out,"lastUpdate=");

				ASN1_TIME_print(bio_out,

						X509_CRL_get_lastUpdate(x));

				BIO_printf(bio_out,"\n");

				}

			if (nextupdate == i)

				{

				BIO_printf(bio_out,"nextUpdate=");

				if (X509_CRL_get_nextUpdate(x)) 

					ASN1_TIME_print(bio_out,

						X509_CRL_get_nextUpdate(x));

				else

					BIO_printf(bio_out,"NONE");

				BIO_printf(bio_out,"\n");

				}

			if (fingerprint == i)

				{

				int j;

				unsigned int n;

				unsigned char md[EVP_MAX_MD_SIZE];

				if (!X509_CRL_digest(x,digest,md,&n))

					{

					BIO_printf(bio_err,"out of memory\n");

					goto end;

					}

				BIO_printf(bio_out,"%s Fingerprint=",

						OBJ_nid2sn(EVP_MD_type(digest)));

				for (j=0; j<(int)n; j++)

					{

					BIO_printf(bio_out,"%02X%c",md[j],

						(j+1 == (int)n)

						?'\n':':');

					}

				}

			}

		}

	out=BIO_new(BIO_s_file());

	if (out == NULL)

		{

		ERR_print_errors(bio_err);

		goto end;

		}

	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 (text) X509_CRL_print(out, x);

	if (noout) 

		{

		ret = 0;

		goto end;

		}

	if 	(outformat == FORMAT_ASN1)

		i=(int)i2d_X509_CRL_bio(out,x);

	else if (outformat == FORMAT_PEM)

		i=PEM_write_bio_X509_CRL(out,x);

	else	

		{

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

		goto end;

		}

	if (!i) { BIO_printf(bio_err,"unable to write CRL\n"); goto end; }

	ret=0;

end:

	BIO_free_all(out);

	BIO_free_all(bio_out);

	bio_out=NULL;

	X509_CRL_free(x);

	if(store) {

		X509_STORE_CTX_cleanup(&ctx);

		X509_STORE_free(store);

	}

	apps_shutdown();

	OPENSSL_EXIT(ret);

	}

static X509_CRL *load_crl(char *infile, int format)

	{

	X509_CRL *x=NULL;

	BIO *in=NULL;

	in=BIO_new(BIO_s_file());

	if (in == NULL)

		{

		ERR_print_errors(bio_err);

		goto end;

		}

	if (infile == NULL)

		BIO_set_fp(in,stdin,BIO_NOCLOSE);

  else

		{

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

			{

			perror(infile);

			goto end;

			}

		}

	if 	(format == FORMAT_ASN1)

		x=d2i_X509_CRL_bio(in,NULL);

	else if (format == FORMAT_PEM)

		x=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 (x == NULL)

		{

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

		ERR_print_errors(bio_err);

		goto end;

		}

end:

	BIO_free(in);

	return(x);

	}