crl2p7.c

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/* 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);
        }

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