1 /*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 <string.h>
12 #include <sys/types.h>
13 #include "apps.h"
14 #include "progs.h"
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/x509.h>
18 #include <openssl/pkcs7.h>
19 #include <openssl/pem.h>
20 #include <openssl/objects.h>
21
22 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
23
24 typedef enum OPTION_choice {
25 OPT_COMMON,
26 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOCRL, OPT_CERTFILE,
27 OPT_PROV_ENUM
28 } OPTION_CHOICE;
29
30 const OPTIONS crl2pkcs7_options[] = {
31 OPT_SECTION("General"),
32 {"help", OPT_HELP, '-', "Display this summary"},
33
34 OPT_SECTION("Input"),
35 {"in", OPT_IN, '<', "Input file"},
36 {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
37 {"nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'"},
38 {"certfile", OPT_CERTFILE, '<',
39 "File of chain of certs to a trusted CA; can be repeated"},
40
41 OPT_SECTION("Output"),
42 {"out", OPT_OUT, '>', "Output file"},
43 {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
44
45 OPT_PROV_OPTIONS,
46 {NULL}
47 };
48
crl2pkcs7_main(int argc,char ** argv)49 int crl2pkcs7_main(int argc, char **argv)
50 {
51 BIO *in = NULL, *out = NULL;
52 PKCS7 *p7 = NULL;
53 PKCS7_SIGNED *p7s = NULL;
54 STACK_OF(OPENSSL_STRING) *certflst = NULL;
55 STACK_OF(X509) *cert_stack = NULL;
56 STACK_OF(X509_CRL) *crl_stack = NULL;
57 X509_CRL *crl = NULL;
58 char *infile = NULL, *outfile = NULL, *prog, *certfile;
59 int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl =
60 0;
61 OPTION_CHOICE o;
62
63 prog = opt_init(argc, argv, crl2pkcs7_options);
64 while ((o = opt_next()) != OPT_EOF) {
65 switch (o) {
66 case OPT_EOF:
67 case OPT_ERR:
68 opthelp:
69 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
70 goto end;
71 case OPT_HELP:
72 opt_help(crl2pkcs7_options);
73 ret = 0;
74 goto end;
75 case OPT_INFORM:
76 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
77 goto opthelp;
78 break;
79 case OPT_OUTFORM:
80 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
81 goto opthelp;
82 break;
83 case OPT_IN:
84 infile = opt_arg();
85 break;
86 case OPT_OUT:
87 outfile = opt_arg();
88 break;
89 case OPT_NOCRL:
90 nocrl = 1;
91 break;
92 case OPT_CERTFILE:
93 if ((certflst == NULL)
94 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL)
95 goto end;
96 if (!sk_OPENSSL_STRING_push(certflst, opt_arg()))
97 goto end;
98 break;
99 case OPT_PROV_CASES:
100 if (!opt_provider(o))
101 goto end;
102 break;
103 }
104 }
105
106 /* No remaining args. */
107 if (!opt_check_rest_arg(NULL))
108 goto opthelp;
109
110 if (!nocrl) {
111 in = bio_open_default(infile, 'r', informat);
112 if (in == NULL)
113 goto end;
114
115 if (informat == FORMAT_ASN1)
116 crl = d2i_X509_CRL_bio(in, NULL);
117 else if (informat == FORMAT_PEM)
118 crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
119 if (crl == NULL) {
120 BIO_printf(bio_err, "unable to load CRL\n");
121 ERR_print_errors(bio_err);
122 goto end;
123 }
124 }
125
126 if ((p7 = PKCS7_new()) == NULL)
127 goto end;
128 if ((p7s = PKCS7_SIGNED_new()) == NULL)
129 goto end;
130 p7->type = OBJ_nid2obj(NID_pkcs7_signed);
131 p7->d.sign = p7s;
132 p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
133
134 if (!ASN1_INTEGER_set(p7s->version, 1))
135 goto end;
136
137 if (crl != NULL) {
138 if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
139 goto end;
140 p7s->crl = crl_stack;
141 sk_X509_CRL_push(crl_stack, crl);
142 crl = NULL; /* now part of p7 for OPENSSL_freeing */
143 }
144
145 if (certflst != NULL) {
146 if ((cert_stack = sk_X509_new_null()) == NULL)
147 goto end;
148 p7s->cert = cert_stack;
149
150 for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
151 certfile = sk_OPENSSL_STRING_value(certflst, i);
152 if (add_certs_from_file(cert_stack, certfile) < 0) {
153 BIO_printf(bio_err, "error loading certificates\n");
154 ERR_print_errors(bio_err);
155 goto end;
156 }
157 }
158 }
159
160 out = bio_open_default(outfile, 'w', outformat);
161 if (out == NULL)
162 goto end;
163
164 if (outformat == FORMAT_ASN1)
165 i = i2d_PKCS7_bio(out, p7);
166 else if (outformat == FORMAT_PEM)
167 i = PEM_write_bio_PKCS7(out, p7);
168 if (!i) {
169 BIO_printf(bio_err, "unable to write pkcs7 object\n");
170 ERR_print_errors(bio_err);
171 goto end;
172 }
173 ret = 0;
174 end:
175 sk_OPENSSL_STRING_free(certflst);
176 BIO_free(in);
177 BIO_free_all(out);
178 PKCS7_free(p7);
179 X509_CRL_free(crl);
180
181 return ret;
182 }
183
184 /*-
185 *----------------------------------------------------------------------
186 * int add_certs_from_file
187 *
188 * Read a list of certificates to be checked from a file.
189 *
190 * Results:
191 * number of certs added if successful, -1 if not.
192 *----------------------------------------------------------------------
193 */
add_certs_from_file(STACK_OF (X509)* stack,char * certfile)194 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
195 {
196 BIO *in = NULL;
197 int count = 0;
198 int ret = -1;
199 STACK_OF(X509_INFO) *sk = NULL;
200 X509_INFO *xi;
201
202 in = BIO_new_file(certfile, "r");
203 if (in == NULL) {
204 BIO_printf(bio_err, "error opening the file, %s\n", certfile);
205 goto end;
206 }
207
208 /* This loads from a file, a stack of x509/crl/pkey sets */
209 sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
210 if (sk == NULL) {
211 BIO_printf(bio_err, "error reading the file, %s\n", certfile);
212 goto end;
213 }
214
215 /* scan over it and pull out the CRL's */
216 while (sk_X509_INFO_num(sk)) {
217 xi = sk_X509_INFO_shift(sk);
218 if (xi->x509 != NULL) {
219 sk_X509_push(stack, xi->x509);
220 xi->x509 = NULL;
221 count++;
222 }
223 X509_INFO_free(xi);
224 }
225
226 ret = count;
227 end:
228 /* never need to OPENSSL_free x */
229 BIO_free(in);
230 sk_X509_INFO_free(sk);
231 return ret;
232 }
233
