text:  
  /* 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",
  " -crlnumber      - print CRL number\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, crlnumber = 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 (strcmp(*argv,"-crlnumber") == 0)
  			crlnumber= ++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 (crlnumber == i)
  				{
  				ASN1_INTEGER *crlnum;
  				crlnum = X509_CRL_get_ext_d2i(x, NID_crl_number,
  							      NULL, NULL);
  				BIO_printf(bio_out,"crlNumber=");
  				if (crlnum)
  					{
  					i2a_ASN1_INTEGER(bio_out, crlnum);
  					ASN1_INTEGER_free(crlnum);
  					}
  				else
  					BIO_puts(bio_out, "<NONE>");
  				BIO_printf(bio_out,"\n");
  				}
  			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);
  	}
  
  