verify.c revision 296465 
1/* apps/verify.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#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include "apps.h"
63#include <openssl/bio.h>
64#include <openssl/err.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67#include <openssl/pem.h>
68
69#undef PROG
70#define PROG    verify_main
71
72static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
73static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
74                 STACK_OF(X509) *tchain, int purpose, ENGINE *e);
75static STACK_OF(X509) *load_untrusted(char *file);
76static int v_verbose = 0, vflags = 0;
77
78int MAIN(int, char **);
79
80int MAIN(int argc, char **argv)
81{
82    ENGINE *e = NULL;
83    int i, ret = 1, badarg = 0;
84    int purpose = -1;
85    char *CApath = NULL, *CAfile = NULL;
86    char *untfile = NULL, *trustfile = NULL;
87    STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
88    X509_STORE *cert_ctx = NULL;
89    X509_LOOKUP *lookup = NULL;
90    X509_VERIFY_PARAM *vpm = NULL;
91#ifndef OPENSSL_NO_ENGINE
92    char *engine = NULL;
93#endif
94
95    cert_ctx = X509_STORE_new();
96    if (cert_ctx == NULL)
97        goto end;
98    X509_STORE_set_verify_cb_func(cert_ctx, cb);
99
100    ERR_load_crypto_strings();
101
102    apps_startup();
103
104    if (bio_err == NULL)
105        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
106            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
107
108    if (!load_config(bio_err, NULL))
109        goto end;
110
111    argc--;
112    argv++;
113    for (;;) {
114        if (argc >= 1) {
115            if (strcmp(*argv, "-CApath") == 0) {
116                if (argc-- < 1)
117                    goto end;
118                CApath = *(++argv);
119            } else if (strcmp(*argv, "-CAfile") == 0) {
120                if (argc-- < 1)
121                    goto end;
122                CAfile = *(++argv);
123            } else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm)) {
124                if (badarg)
125                    goto end;
126                continue;
127            } else if (strcmp(*argv, "-untrusted") == 0) {
128                if (argc-- < 1)
129                    goto end;
130                untfile = *(++argv);
131            } else if (strcmp(*argv, "-trusted") == 0) {
132                if (argc-- < 1)
133                    goto end;
134                trustfile = *(++argv);
135            }
136#ifndef OPENSSL_NO_ENGINE
137            else if (strcmp(*argv, "-engine") == 0) {
138                if (--argc < 1)
139                    goto end;
140                engine = *(++argv);
141            }
142#endif
143            else if (strcmp(*argv, "-help") == 0)
144                goto end;
145            else if (strcmp(*argv, "-verbose") == 0)
146                v_verbose = 1;
147            else if (argv[0][0] == '-')
148                goto end;
149            else
150                break;
151            argc--;
152            argv++;
153        } else
154            break;
155    }
156
157#ifndef OPENSSL_NO_ENGINE
158    e = setup_engine(bio_err, engine, 0);
159#endif
160
161    if (vpm)
162        X509_STORE_set1_param(cert_ctx, vpm);
163
164    lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
165    if (lookup == NULL)
166        abort();
167    if (CAfile) {
168        i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
169        if (!i) {
170            BIO_printf(bio_err, "Error loading file %s\n", CAfile);
171            ERR_print_errors(bio_err);
172            goto end;
173        }
174    } else
175        X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
176
177    lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
178    if (lookup == NULL)
179        abort();
180    if (CApath) {
181        i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
182        if (!i) {
183            BIO_printf(bio_err, "Error loading directory %s\n", CApath);
184            ERR_print_errors(bio_err);
185            goto end;
186        }
187    } else
188        X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
189
190    ERR_clear_error();
191
192    if (untfile) {
193        if (!(untrusted = load_untrusted(untfile))) {
194            BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
195            ERR_print_errors(bio_err);
196            goto end;
197        }
198    }
199
200    if (trustfile) {
201        if (!(trusted = load_untrusted(trustfile))) {
202            BIO_printf(bio_err, "Error loading untrusted file %s\n",
203                       trustfile);
204            ERR_print_errors(bio_err);
205            goto end;
206        }
207    }
208
209    if (argc < 1)
210        check(cert_ctx, NULL, untrusted, trusted, purpose, e);
211    else
212        for (i = 0; i < argc; i++)
213            check(cert_ctx, argv[i], untrusted, trusted, purpose, e);
214    ret = 0;
215 end:
216    if (ret == 1) {
217        BIO_printf(bio_err,
218                   "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
219#ifndef OPENSSL_NO_ENGINE
220        BIO_printf(bio_err, " [-engine e]");
221#endif
222        BIO_printf(bio_err, " cert1 cert2 ...\n");
223        BIO_printf(bio_err, "recognized usages:\n");
224        for (i = 0; i < X509_PURPOSE_get_count(); i++) {
225            X509_PURPOSE *ptmp;
226            ptmp = X509_PURPOSE_get0(i);
227            BIO_printf(bio_err, "\t%-10s\t%s\n",
228                       X509_PURPOSE_get0_sname(ptmp),
229                       X509_PURPOSE_get0_name(ptmp));
230        }
231    }
232    if (vpm)
233        X509_VERIFY_PARAM_free(vpm);
234    if (cert_ctx != NULL)
235        X509_STORE_free(cert_ctx);
236    sk_X509_pop_free(untrusted, X509_free);
237    sk_X509_pop_free(trusted, X509_free);
238    apps_shutdown();
239    OPENSSL_EXIT(ret);
240}
241
242static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
243                 STACK_OF(X509) *tchain, int purpose, ENGINE *e)
244{
245    X509 *x = NULL;
246    int i = 0, ret = 0;
247    X509_STORE_CTX *csc;
248
249    x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
250    if (x == NULL)
251        goto end;
252    fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
253
254    csc = X509_STORE_CTX_new();
255    if (csc == NULL) {
256        ERR_print_errors(bio_err);
257        goto end;
258    }
259    X509_STORE_set_flags(ctx, vflags);
260    if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
261        ERR_print_errors(bio_err);
262        goto end;
263    }
264    if (tchain)
265        X509_STORE_CTX_trusted_stack(csc, tchain);
266    if (purpose >= 0)
267        X509_STORE_CTX_set_purpose(csc, purpose);
268    i = X509_verify_cert(csc);
269    X509_STORE_CTX_free(csc);
270
271    ret = 0;
272 end:
273    if (i > 0) {
274        fprintf(stdout, "OK\n");
275        ret = 1;
276    } else
277        ERR_print_errors(bio_err);
278    if (x != NULL)
279        X509_free(x);
280
281    return (ret);
282}
283
284static STACK_OF(X509) *load_untrusted(char *certfile)
285{
286    STACK_OF(X509_INFO) *sk = NULL;
287    STACK_OF(X509) *stack = NULL, *ret = NULL;
288    BIO *in = NULL;
289    X509_INFO *xi;
290
291    if (!(stack = sk_X509_new_null())) {
292        BIO_printf(bio_err, "memory allocation failure\n");
293        goto end;
294    }
295
296    if (!(in = BIO_new_file(certfile, "r"))) {
297        BIO_printf(bio_err, "error opening the file, %s\n", certfile);
298        goto end;
299    }
300
301    /* This loads from a file, a stack of x509/crl/pkey sets */
302    if (!(sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL))) {
303        BIO_printf(bio_err, "error reading the file, %s\n", certfile);
304        goto end;
305    }
306
307    /* scan over it and pull out the certs */
308    while (sk_X509_INFO_num(sk)) {
309        xi = sk_X509_INFO_shift(sk);
310        if (xi->x509 != NULL) {
311            sk_X509_push(stack, xi->x509);
312            xi->x509 = NULL;
313        }
314        X509_INFO_free(xi);
315    }
316    if (!sk_X509_num(stack)) {
317        BIO_printf(bio_err, "no certificates in file, %s\n", certfile);
318        sk_X509_free(stack);
319        goto end;
320    }
321    ret = stack;
322 end:
323    BIO_free(in);
324    sk_X509_INFO_free(sk);
325    return (ret);
326}
327
328static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
329{
330    char buf[256];
331
332    if (!ok) {
333        if (ctx->current_cert) {
334            X509_NAME_oneline(X509_get_subject_name(ctx->current_cert), buf,
335                              sizeof buf);
336            printf("%s\n", buf);
337        }
338        printf("error %d at %d depth lookup:%s\n", ctx->error,
339               ctx->error_depth, X509_verify_cert_error_string(ctx->error));
340        if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED)
341            ok = 1;
342        /*
343         * since we are just checking the certificates, it is ok if they are
344         * self signed. But we should still warn the user.
345         */
346        if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
347            ok = 1;
348        /* Continue after extension errors too */
349        if (ctx->error == X509_V_ERR_INVALID_CA)
350            ok = 1;
351        if (ctx->error == X509_V_ERR_INVALID_NON_CA)
352            ok = 1;
353        if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED)
354            ok = 1;
355        if (ctx->error == X509_V_ERR_INVALID_PURPOSE)
356            ok = 1;
357        if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT)
358            ok = 1;
359        if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED)
360            ok = 1;
361        if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID)
362            ok = 1;
363        if (ctx->error == X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION)
364            ok = 1;
365
366        if (ctx->error == X509_V_ERR_NO_EXPLICIT_POLICY)
367            policies_print(NULL, ctx);
368        return ok;
369
370    }
371    if ((ctx->error == X509_V_OK) && (ok == 2))
372        policies_print(NULL, ctx);
373    if (!v_verbose)
374        ERR_clear_error();
375    return (ok);
376}
377