1/*
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include "apps.h"
14#include "progs.h"
15#include <openssl/bio.h>
16#include <openssl/err.h>
17#include <openssl/x509.h>
18#include <openssl/x509v3.h>
19#include <openssl/pem.h>
20
21typedef enum OPTION_choice {
22    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
23    OPT_INFORM, OPT_IN, OPT_OUTFORM, OPT_OUT, OPT_KEYFORM, OPT_KEY,
24    OPT_ISSUER, OPT_LASTUPDATE, OPT_NEXTUPDATE, OPT_FINGERPRINT,
25    OPT_CRLNUMBER, OPT_BADSIG, OPT_GENDELTA, OPT_CAPATH, OPT_CAFILE,
26    OPT_NOCAPATH, OPT_NOCAFILE, OPT_VERIFY, OPT_TEXT, OPT_HASH, OPT_HASH_OLD,
27    OPT_NOOUT, OPT_NAMEOPT, OPT_MD
28} OPTION_CHOICE;
29
30const OPTIONS crl_options[] = {
31    {"help", OPT_HELP, '-', "Display this summary"},
32    {"inform", OPT_INFORM, 'F', "Input format; default PEM"},
33    {"in", OPT_IN, '<', "Input file - default stdin"},
34    {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
35    {"out", OPT_OUT, '>', "output file - default stdout"},
36    {"keyform", OPT_KEYFORM, 'F', "Private key file format (PEM or ENGINE)"},
37    {"key", OPT_KEY, '<', "CRL signing Private key to use"},
38    {"issuer", OPT_ISSUER, '-', "Print issuer DN"},
39    {"lastupdate", OPT_LASTUPDATE, '-', "Set lastUpdate field"},
40    {"nextupdate", OPT_NEXTUPDATE, '-', "Set nextUpdate field"},
41    {"noout", OPT_NOOUT, '-', "No CRL output"},
42    {"fingerprint", OPT_FINGERPRINT, '-', "Print the crl fingerprint"},
43    {"crlnumber", OPT_CRLNUMBER, '-', "Print CRL number"},
44    {"badsig", OPT_BADSIG, '-', "Corrupt last byte of loaded CRL signature (for test)" },
45    {"gendelta", OPT_GENDELTA, '<', "Other CRL to compare/diff to the Input one"},
46    {"CApath", OPT_CAPATH, '/', "Verify CRL using certificates in dir"},
47    {"CAfile", OPT_CAFILE, '<', "Verify CRL using certificates in file name"},
48    {"no-CAfile", OPT_NOCAFILE, '-',
49     "Do not load the default certificates file"},
50    {"no-CApath", OPT_NOCAPATH, '-',
51     "Do not load certificates from the default certificates directory"},
52    {"verify", OPT_VERIFY, '-', "Verify CRL signature"},
53    {"text", OPT_TEXT, '-', "Print out a text format version"},
54    {"hash", OPT_HASH, '-', "Print hash value"},
55    {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
56    {"", OPT_MD, '-', "Any supported digest"},
57#ifndef OPENSSL_NO_MD5
58    {"hash_old", OPT_HASH_OLD, '-', "Print old-style (MD5) hash value"},
59#endif
60    {NULL}
61};
62
63int crl_main(int argc, char **argv)
64{
65    X509_CRL *x = NULL;
66    BIO *out = NULL;
67    X509_STORE *store = NULL;
68    X509_STORE_CTX *ctx = NULL;
69    X509_LOOKUP *lookup = NULL;
70    X509_OBJECT *xobj = NULL;
71    EVP_PKEY *pkey;
72    const EVP_MD *digest = EVP_sha1();
73    char *infile = NULL, *outfile = NULL, *crldiff = NULL, *keyfile = NULL;
74    const char *CAfile = NULL, *CApath = NULL, *prog;
75    OPTION_CHOICE o;
76    int hash = 0, issuer = 0, lastupdate = 0, nextupdate = 0, noout = 0;
77    int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyformat = FORMAT_PEM;
78    int ret = 1, num = 0, badsig = 0, fingerprint = 0, crlnumber = 0;
79    int text = 0, do_ver = 0, noCAfile = 0, noCApath = 0;
80    int i;
81#ifndef OPENSSL_NO_MD5
82    int hash_old = 0;
83#endif
84
85    prog = opt_init(argc, argv, crl_options);
86    while ((o = opt_next()) != OPT_EOF) {
87        switch (o) {
88        case OPT_EOF:
89        case OPT_ERR:
90 opthelp:
91            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
92            goto end;
93        case OPT_HELP:
94            opt_help(crl_options);
95            ret = 0;
96            goto end;
97        case OPT_INFORM:
98            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
99                goto opthelp;
100            break;
101        case OPT_IN:
102            infile = opt_arg();
103            break;
104        case OPT_OUTFORM:
105            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
106                goto opthelp;
107            break;
108        case OPT_OUT:
109            outfile = opt_arg();
110            break;
111        case OPT_KEYFORM:
112            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &keyformat))
113                goto opthelp;
114            break;
115        case OPT_KEY:
116            keyfile = opt_arg();
117            break;
118        case OPT_GENDELTA:
119            crldiff = opt_arg();
120            break;
121        case OPT_CAPATH:
122            CApath = opt_arg();
123            do_ver = 1;
124            break;
125        case OPT_CAFILE:
126            CAfile = opt_arg();
127            do_ver = 1;
128            break;
129        case OPT_NOCAPATH:
130            noCApath =  1;
131            break;
132        case OPT_NOCAFILE:
133            noCAfile =  1;
134            break;
135        case OPT_HASH_OLD:
136#ifndef OPENSSL_NO_MD5
137            hash_old = ++num;
138#endif
139            break;
140        case OPT_VERIFY:
141            do_ver = 1;
142            break;
143        case OPT_TEXT:
144            text = 1;
145            break;
146        case OPT_HASH:
147            hash = ++num;
148            break;
149        case OPT_ISSUER:
150            issuer = ++num;
151            break;
152        case OPT_LASTUPDATE:
153            lastupdate = ++num;
154            break;
155        case OPT_NEXTUPDATE:
156            nextupdate = ++num;
157            break;
158        case OPT_NOOUT:
159            noout = ++num;
160            break;
161        case OPT_FINGERPRINT:
162            fingerprint = ++num;
163            break;
164        case OPT_CRLNUMBER:
165            crlnumber = ++num;
166            break;
167        case OPT_BADSIG:
168            badsig = 1;
169            break;
170        case OPT_NAMEOPT:
171            if (!set_nameopt(opt_arg()))
172                goto opthelp;
173            break;
174        case OPT_MD:
175            if (!opt_md(opt_unknown(), &digest))
176                goto opthelp;
177        }
178    }
179    argc = opt_num_rest();
180    if (argc != 0)
181        goto opthelp;
182
183    x = load_crl(infile, informat);
184    if (x == NULL)
185        goto end;
186
187    if (do_ver) {
188        if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)
189            goto end;
190        lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
191        if (lookup == NULL)
192            goto end;
193        ctx = X509_STORE_CTX_new();
194        if (ctx == NULL || !X509_STORE_CTX_init(ctx, store, NULL, NULL)) {
195            BIO_printf(bio_err, "Error initialising X509 store\n");
196            goto end;
197        }
198
199        xobj = X509_STORE_CTX_get_obj_by_subject(ctx, X509_LU_X509,
200                                                 X509_CRL_get_issuer(x));
201        if (xobj == NULL) {
202            BIO_printf(bio_err, "Error getting CRL issuer certificate\n");
203            goto end;
204        }
205        pkey = X509_get_pubkey(X509_OBJECT_get0_X509(xobj));
206        X509_OBJECT_free(xobj);
207        if (!pkey) {
208            BIO_printf(bio_err, "Error getting CRL issuer public key\n");
209            goto end;
210        }
211        i = X509_CRL_verify(x, pkey);
212        EVP_PKEY_free(pkey);
213        if (i < 0)
214            goto end;
215        if (i == 0)
216            BIO_printf(bio_err, "verify failure\n");
217        else
218            BIO_printf(bio_err, "verify OK\n");
219    }
220
221    if (crldiff) {
222        X509_CRL *newcrl, *delta;
223        if (!keyfile) {
224            BIO_puts(bio_err, "Missing CRL signing key\n");
225            goto end;
226        }
227        newcrl = load_crl(crldiff, informat);
228        if (!newcrl)
229            goto end;
230        pkey = load_key(keyfile, keyformat, 0, NULL, NULL, "CRL signing key");
231        if (!pkey) {
232            X509_CRL_free(newcrl);
233            goto end;
234        }
235        delta = X509_CRL_diff(x, newcrl, pkey, digest, 0);
236        X509_CRL_free(newcrl);
237        EVP_PKEY_free(pkey);
238        if (delta) {
239            X509_CRL_free(x);
240            x = delta;
241        } else {
242            BIO_puts(bio_err, "Error creating delta CRL\n");
243            goto end;
244        }
245    }
246
247    if (badsig) {
248        const ASN1_BIT_STRING *sig;
249
250        X509_CRL_get0_signature(x, &sig, NULL);
251        corrupt_signature(sig);
252    }
253
254    if (num) {
255        for (i = 1; i <= num; i++) {
256            if (issuer == i) {
257                print_name(bio_out, "issuer=", X509_CRL_get_issuer(x),
258                           get_nameopt());
259            }
260            if (crlnumber == i) {
261                ASN1_INTEGER *crlnum;
262                crlnum = X509_CRL_get_ext_d2i(x, NID_crl_number, NULL, NULL);
263                BIO_printf(bio_out, "crlNumber=");
264                if (crlnum) {
265                    i2a_ASN1_INTEGER(bio_out, crlnum);
266                    ASN1_INTEGER_free(crlnum);
267                } else
268                    BIO_puts(bio_out, "<NONE>");
269                BIO_printf(bio_out, "\n");
270            }
271            if (hash == i) {
272                BIO_printf(bio_out, "%08lx\n",
273                           X509_NAME_hash(X509_CRL_get_issuer(x)));
274            }
275#ifndef OPENSSL_NO_MD5
276            if (hash_old == i) {
277                BIO_printf(bio_out, "%08lx\n",
278                           X509_NAME_hash_old(X509_CRL_get_issuer(x)));
279            }
280#endif
281            if (lastupdate == i) {
282                BIO_printf(bio_out, "lastUpdate=");
283                ASN1_TIME_print(bio_out, X509_CRL_get0_lastUpdate(x));
284                BIO_printf(bio_out, "\n");
285            }
286            if (nextupdate == i) {
287                BIO_printf(bio_out, "nextUpdate=");
288                if (X509_CRL_get0_nextUpdate(x))
289                    ASN1_TIME_print(bio_out, X509_CRL_get0_nextUpdate(x));
290                else
291                    BIO_printf(bio_out, "NONE");
292                BIO_printf(bio_out, "\n");
293            }
294            if (fingerprint == i) {
295                int j;
296                unsigned int n;
297                unsigned char md[EVP_MAX_MD_SIZE];
298
299                if (!X509_CRL_digest(x, digest, md, &n)) {
300                    BIO_printf(bio_err, "out of memory\n");
301                    goto end;
302                }
303                BIO_printf(bio_out, "%s Fingerprint=",
304                           OBJ_nid2sn(EVP_MD_type(digest)));
305                for (j = 0; j < (int)n; j++) {
306                    BIO_printf(bio_out, "%02X%c", md[j], (j + 1 == (int)n)
307                               ? '\n' : ':');
308                }
309            }
310        }
311    }
312    out = bio_open_default(outfile, 'w', outformat);
313    if (out == NULL)
314        goto end;
315
316    if (text)
317        X509_CRL_print_ex(out, x, get_nameopt());
318
319    if (noout) {
320        ret = 0;
321        goto end;
322    }
323
324    if (outformat == FORMAT_ASN1)
325        i = (int)i2d_X509_CRL_bio(out, x);
326    else
327        i = PEM_write_bio_X509_CRL(out, x);
328    if (!i) {
329        BIO_printf(bio_err, "unable to write CRL\n");
330        goto end;
331    }
332    ret = 0;
333
334 end:
335    if (ret != 0)
336        ERR_print_errors(bio_err);
337    BIO_free_all(out);
338    X509_CRL_free(x);
339    X509_STORE_CTX_free(ctx);
340    X509_STORE_free(store);
341    return ret;
342}
343