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crl.c

/* 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);
      }


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