crl.c

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/* apps/crl.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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);
    }