crl2p7.c revision 296465 
1/* apps/crl2p7.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/*
60 * This was written by Gordon Chaffee <chaffee@plateau.cs.berkeley.edu> and
61 * donated 'to the cause' along with lots and lots of other fixes to the
62 * library.
63 */
64
65#include <stdio.h>
66#include <string.h>
67#include <sys/types.h>
68#include <sys/stat.h>
69#include "apps.h"
70#include <openssl/err.h>
71#include <openssl/evp.h>
72#include <openssl/x509.h>
73#include <openssl/pkcs7.h>
74#include <openssl/pem.h>
75#include <openssl/objects.h>
76
77static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
78#undef PROG
79#define PROG    crl2pkcs7_main
80
81/*-
82 * -inform arg  - input format - default PEM (DER or PEM)
83 * -outform arg - output format - default PEM
84 * -in arg      - input file - default stdin
85 * -out arg     - output file - default stdout
86 */
87
88int MAIN(int, char **);
89
90int MAIN(int argc, char **argv)
91{
92    int i, badops = 0;
93    BIO *in = NULL, *out = NULL;
94    int informat, outformat;
95    char *infile, *outfile, *prog, *certfile;
96    PKCS7 *p7 = NULL;
97    PKCS7_SIGNED *p7s = NULL;
98    X509_CRL *crl = NULL;
99    STACK *certflst = NULL;
100    STACK_OF(X509_CRL) *crl_stack = NULL;
101    STACK_OF(X509) *cert_stack = NULL;
102    int ret = 1, nocrl = 0;
103
104    apps_startup();
105
106    if (bio_err == NULL)
107        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
108            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
109
110    infile = NULL;
111    outfile = NULL;
112    informat = FORMAT_PEM;
113    outformat = FORMAT_PEM;
114
115    prog = argv[0];
116    argc--;
117    argv++;
118    while (argc >= 1) {
119        if (strcmp(*argv, "-inform") == 0) {
120            if (--argc < 1)
121                goto bad;
122            informat = str2fmt(*(++argv));
123        } else if (strcmp(*argv, "-outform") == 0) {
124            if (--argc < 1)
125                goto bad;
126            outformat = str2fmt(*(++argv));
127        } else if (strcmp(*argv, "-in") == 0) {
128            if (--argc < 1)
129                goto bad;
130            infile = *(++argv);
131        } else if (strcmp(*argv, "-nocrl") == 0) {
132            nocrl = 1;
133        } else if (strcmp(*argv, "-out") == 0) {
134            if (--argc < 1)
135                goto bad;
136            outfile = *(++argv);
137        } else if (strcmp(*argv, "-certfile") == 0) {
138            if (--argc < 1)
139                goto bad;
140            if (!certflst)
141                certflst = sk_new_null();
142            if (!certflst)
143                goto end;
144            if (!sk_push(certflst, *(++argv))) {
145                sk_free(certflst);
146                goto end;
147            }
148        } else {
149            BIO_printf(bio_err, "unknown option %s\n", *argv);
150            badops = 1;
151            break;
152        }
153        argc--;
154        argv++;
155    }
156
157    if (badops) {
158 bad:
159        BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
160        BIO_printf(bio_err, "where options are\n");
161        BIO_printf(bio_err, " -inform arg    input format - DER or PEM\n");
162        BIO_printf(bio_err, " -outform arg   output format - DER or PEM\n");
163        BIO_printf(bio_err, " -in arg        input file\n");
164        BIO_printf(bio_err, " -out arg       output file\n");
165        BIO_printf(bio_err,
166                   " -certfile arg  certificates file of chain to a trusted CA\n");
167        BIO_printf(bio_err, "                (can be used more than once)\n");
168        BIO_printf(bio_err,
169                   " -nocrl         no crl to load, just certs from '-certfile'\n");
170        ret = 1;
171        goto end;
172    }
173
174    ERR_load_crypto_strings();
175
176    in = BIO_new(BIO_s_file());
177    out = BIO_new(BIO_s_file());
178    if ((in == NULL) || (out == NULL)) {
179        ERR_print_errors(bio_err);
180        goto end;
181    }
182
183    if (!nocrl) {
184        if (infile == NULL)
185            BIO_set_fp(in, stdin, BIO_NOCLOSE);
186        else {
187            if (BIO_read_filename(in, infile) <= 0) {
188                perror(infile);
189                goto end;
190            }
191        }
192
193        if (informat == FORMAT_ASN1)
194            crl = d2i_X509_CRL_bio(in, NULL);
195        else if (informat == FORMAT_PEM)
196            crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
197        else {
198            BIO_printf(bio_err, "bad input format specified for input crl\n");
199            goto end;
200        }
201        if (crl == NULL) {
202            BIO_printf(bio_err, "unable to load CRL\n");
203            ERR_print_errors(bio_err);
204            goto end;
205        }
206    }
207
208    if ((p7 = PKCS7_new()) == NULL)
209        goto end;
210    if ((p7s = PKCS7_SIGNED_new()) == NULL)
211        goto end;
212    p7->type = OBJ_nid2obj(NID_pkcs7_signed);
213    p7->d.sign = p7s;
214    p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
215
216    if (!ASN1_INTEGER_set(p7s->version, 1))
217        goto end;
218    if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
219        goto end;
220    p7s->crl = crl_stack;
221    if (crl != NULL) {
222        sk_X509_CRL_push(crl_stack, crl);
223        crl = NULL;             /* now part of p7 for OPENSSL_freeing */
224    }
225
226    if ((cert_stack = sk_X509_new_null()) == NULL)
227        goto end;
228    p7s->cert = cert_stack;
229
230    if (certflst)
231        for (i = 0; i < sk_num(certflst); i++) {
232            certfile = sk_value(certflst, i);
233            if (add_certs_from_file(cert_stack, certfile) < 0) {
234                BIO_printf(bio_err, "error loading certificates\n");
235                ERR_print_errors(bio_err);
236                goto end;
237            }
238        }
239
240    sk_free(certflst);
241
242    if (outfile == NULL) {
243        BIO_set_fp(out, stdout, BIO_NOCLOSE);
244#ifdef OPENSSL_SYS_VMS
245        {
246            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
247            out = BIO_push(tmpbio, out);
248        }
249#endif
250    } else {
251        if (BIO_write_filename(out, outfile) <= 0) {
252            perror(outfile);
253            goto end;
254        }
255    }
256
257    if (outformat == FORMAT_ASN1)
258        i = i2d_PKCS7_bio(out, p7);
259    else if (outformat == FORMAT_PEM)
260        i = PEM_write_bio_PKCS7(out, p7);
261    else {
262        BIO_printf(bio_err, "bad output format specified for outfile\n");
263        goto end;
264    }
265    if (!i) {
266        BIO_printf(bio_err, "unable to write pkcs7 object\n");
267        ERR_print_errors(bio_err);
268        goto end;
269    }
270    ret = 0;
271 end:
272    if (in != NULL)
273        BIO_free(in);
274    if (out != NULL)
275        BIO_free_all(out);
276    if (p7 != NULL)
277        PKCS7_free(p7);
278    if (crl != NULL)
279        X509_CRL_free(crl);
280
281    apps_shutdown();
282    OPENSSL_EXIT(ret);
283}
284
285/*-
286 *----------------------------------------------------------------------
287 * int add_certs_from_file
288 *
289 *      Read a list of certificates to be checked from a file.
290 *
291 * Results:
292 *      number of certs added if successful, -1 if not.
293 *----------------------------------------------------------------------
294 */
295static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
296{
297    struct stat st;
298    BIO *in = NULL;
299    int count = 0;
300    int ret = -1;
301    STACK_OF(X509_INFO) *sk = NULL;
302    X509_INFO *xi;
303
304    if ((stat(certfile, &st) != 0)) {
305        BIO_printf(bio_err, "unable to load the file, %s\n", certfile);
306        goto end;
307    }
308
309    in = BIO_new(BIO_s_file());
310    if ((in == NULL) || (BIO_read_filename(in, certfile) <= 0)) {
311        BIO_printf(bio_err, "error opening the file, %s\n", certfile);
312        goto end;
313    }
314
315    /* This loads from a file, a stack of x509/crl/pkey sets */
316    sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
317    if (sk == NULL) {
318        BIO_printf(bio_err, "error reading the file, %s\n", certfile);
319        goto end;
320    }
321
322    /* scan over it and pull out the CRL's */
323    while (sk_X509_INFO_num(sk)) {
324        xi = sk_X509_INFO_shift(sk);
325        if (xi->x509 != NULL) {
326            sk_X509_push(stack, xi->x509);
327            xi->x509 = NULL;
328            count++;
329        }
330        X509_INFO_free(xi);
331    }
332
333    ret = count;
334 end:
335    /* never need to OPENSSL_free x */
336    if (in != NULL)
337        BIO_free(in);
338    if (sk != NULL)
339        sk_X509_INFO_free(sk);
340    return (ret);
341}
342