crl2p7.c revision 296341 
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 "apps.h"
69#include <openssl/err.h>
70#include <openssl/evp.h>
71#include <openssl/x509.h>
72#include <openssl/pkcs7.h>
73#include <openssl/pem.h>
74#include <openssl/objects.h>
75
76static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
77#undef PROG
78#define PROG    crl2pkcs7_main
79
80/*-
81 * -inform arg  - input format - default PEM (DER or PEM)
82 * -outform arg - output format - default PEM
83 * -in arg      - input file - default stdin
84 * -out arg     - output file - default stdout
85 */
86
87int MAIN(int, char **);
88
89int MAIN(int argc, char **argv)
90{
91    int i, badops = 0;
92    BIO *in = NULL, *out = NULL;
93    int informat, outformat;
94    char *infile, *outfile, *prog, *certfile;
95    PKCS7 *p7 = NULL;
96    PKCS7_SIGNED *p7s = NULL;
97    X509_CRL *crl = NULL;
98    STACK_OF(OPENSSL_STRING) *certflst = NULL;
99    STACK_OF(X509_CRL) *crl_stack = NULL;
100    STACK_OF(X509) *cert_stack = NULL;
101    int ret = 1, nocrl = 0;
102
103    apps_startup();
104
105    if (bio_err == NULL)
106        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
107            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
108
109    infile = NULL;
110    outfile = NULL;
111    informat = FORMAT_PEM;
112    outformat = FORMAT_PEM;
113
114    prog = argv[0];
115    argc--;
116    argv++;
117    while (argc >= 1) {
118        if (strcmp(*argv, "-inform") == 0) {
119            if (--argc < 1)
120                goto bad;
121            informat = str2fmt(*(++argv));
122        } else if (strcmp(*argv, "-outform") == 0) {
123            if (--argc < 1)
124                goto bad;
125            outformat = str2fmt(*(++argv));
126        } else if (strcmp(*argv, "-in") == 0) {
127            if (--argc < 1)
128                goto bad;
129            infile = *(++argv);
130        } else if (strcmp(*argv, "-nocrl") == 0) {
131            nocrl = 1;
132        } else if (strcmp(*argv, "-out") == 0) {
133            if (--argc < 1)
134                goto bad;
135            outfile = *(++argv);
136        } else if (strcmp(*argv, "-certfile") == 0) {
137            if (--argc < 1)
138                goto bad;
139            if (!certflst)
140                certflst = sk_OPENSSL_STRING_new_null();
141            if (!certflst)
142                goto end;
143            if (!sk_OPENSSL_STRING_push(certflst, *(++argv))) {
144                sk_OPENSSL_STRING_free(certflst);
145                goto end;
146            }
147        } else {
148            BIO_printf(bio_err, "unknown option %s\n", *argv);
149            badops = 1;
150            break;
151        }
152        argc--;
153        argv++;
154    }
155
156    if (badops) {
157 bad:
158        BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
159        BIO_printf(bio_err, "where options are\n");
160        BIO_printf(bio_err, " -inform arg    input format - DER or PEM\n");
161        BIO_printf(bio_err, " -outform arg   output format - DER or PEM\n");
162        BIO_printf(bio_err, " -in arg        input file\n");
163        BIO_printf(bio_err, " -out arg       output file\n");
164        BIO_printf(bio_err,
165                   " -certfile arg  certificates file of chain to a trusted CA\n");
166        BIO_printf(bio_err, "                (can be used more than once)\n");
167        BIO_printf(bio_err,
168                   " -nocrl         no crl to load, just certs from '-certfile'\n");
169        ret = 1;
170        goto end;
171    }
172
173    ERR_load_crypto_strings();
174
175    in = BIO_new(BIO_s_file());
176    out = BIO_new(BIO_s_file());
177    if ((in == NULL) || (out == NULL)) {
178        ERR_print_errors(bio_err);
179        goto end;
180    }
181
182    if (!nocrl) {
183        if (infile == NULL)
184            BIO_set_fp(in, stdin, BIO_NOCLOSE);
185        else {
186            if (BIO_read_filename(in, infile) <= 0) {
187                perror(infile);
188                goto end;
189            }
190        }
191
192        if (informat == FORMAT_ASN1)
193            crl = d2i_X509_CRL_bio(in, NULL);
194        else if (informat == FORMAT_PEM)
195            crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
196        else {
197            BIO_printf(bio_err, "bad input format specified for input crl\n");
198            goto end;
199        }
200        if (crl == NULL) {
201            BIO_printf(bio_err, "unable to load CRL\n");
202            ERR_print_errors(bio_err);
203            goto end;
204        }
205    }
206
207    if ((p7 = PKCS7_new()) == NULL)
208        goto end;
209    if ((p7s = PKCS7_SIGNED_new()) == NULL)
210        goto end;
211    p7->type = OBJ_nid2obj(NID_pkcs7_signed);
212    p7->d.sign = p7s;
213    p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
214
215    if (!ASN1_INTEGER_set(p7s->version, 1))
216        goto end;
217    if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
218        goto end;
219    p7s->crl = crl_stack;
220    if (crl != NULL) {
221        sk_X509_CRL_push(crl_stack, crl);
222        crl = NULL;             /* now part of p7 for OPENSSL_freeing */
223    }
224
225    if ((cert_stack = sk_X509_new_null()) == NULL)
226        goto end;
227    p7s->cert = cert_stack;
228
229    if (certflst)
230        for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
231            certfile = sk_OPENSSL_STRING_value(certflst, i);
232            if (add_certs_from_file(cert_stack, certfile) < 0) {
233                BIO_printf(bio_err, "error loading certificates\n");
234                ERR_print_errors(bio_err);
235                goto end;
236            }
237        }
238
239    sk_OPENSSL_STRING_free(certflst);
240
241    if (outfile == NULL) {
242        BIO_set_fp(out, stdout, BIO_NOCLOSE);
243#ifdef OPENSSL_SYS_VMS
244        {
245            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
246            out = BIO_push(tmpbio, out);
247        }
248#endif
249    } else {
250        if (BIO_write_filename(out, outfile) <= 0) {
251            perror(outfile);
252            goto end;
253        }
254    }
255
256    if (outformat == FORMAT_ASN1)
257        i = i2d_PKCS7_bio(out, p7);
258    else if (outformat == FORMAT_PEM)
259        i = PEM_write_bio_PKCS7(out, p7);
260    else {
261        BIO_printf(bio_err, "bad output format specified for outfile\n");
262        goto end;
263    }
264    if (!i) {
265        BIO_printf(bio_err, "unable to write pkcs7 object\n");
266        ERR_print_errors(bio_err);
267        goto end;
268    }
269    ret = 0;
270 end:
271    if (in != NULL)
272        BIO_free(in);
273    if (out != NULL)
274        BIO_free_all(out);
275    if (p7 != NULL)
276        PKCS7_free(p7);
277    if (crl != NULL)
278        X509_CRL_free(crl);
279
280    apps_shutdown();
281    OPENSSL_EXIT(ret);
282}
283
284/*-
285 *----------------------------------------------------------------------
286 * int add_certs_from_file
287 *
288 *      Read a list of certificates to be checked from a file.
289 *
290 * Results:
291 *      number of certs added if successful, -1 if not.
292 *----------------------------------------------------------------------
293 */
294static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
295{
296    BIO *in = NULL;
297    int count = 0;
298    int ret = -1;
299    STACK_OF(X509_INFO) *sk = NULL;
300    X509_INFO *xi;
301
302    in = BIO_new(BIO_s_file());
303    if ((in == NULL) || (BIO_read_filename(in, certfile) <= 0)) {
304        BIO_printf(bio_err, "error opening the file, %s\n", certfile);
305        goto end;
306    }
307
308    /* This loads from a file, a stack of x509/crl/pkey sets */
309    sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
310    if (sk == NULL) {
311        BIO_printf(bio_err, "error reading the file, %s\n", certfile);
312        goto end;
313    }
314
315    /* scan over it and pull out the CRL's */
316    while (sk_X509_INFO_num(sk)) {
317        xi = sk_X509_INFO_shift(sk);
318        if (xi->x509 != NULL) {
319            sk_X509_push(stack, xi->x509);
320            xi->x509 = NULL;
321            count++;
322        }
323        X509_INFO_free(xi);
324    }
325
326    ret = count;
327 end:
328    /* never need to OPENSSL_free x */
329    if (in != NULL)
330        BIO_free(in);
331    if (sk != NULL)
332        sk_X509_INFO_free(sk);
333    return (ret);
334}
335