1 /*
2 * Copyright 1995-2025 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,
27 OPT_OUTFORM,
28 OPT_IN,
29 OPT_OUT,
30 OPT_NOCRL,
31 OPT_CERTFILE,
32 OPT_PROV_ENUM
33 } OPTION_CHOICE;
34
35 const OPTIONS crl2pkcs7_options[] = {
36 OPT_SECTION("General"),
37 { "help", OPT_HELP, '-', "Display this summary" },
38
39 OPT_SECTION("Input"),
40 { "in", OPT_IN, '<', "Input file" },
41 { "inform", OPT_INFORM, 'F', "Input format - DER or PEM" },
42 { "nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'" },
43 { "certfile", OPT_CERTFILE, '<',
44 "File of chain of certs to a trusted CA; can be repeated" },
45
46 OPT_SECTION("Output"),
47 { "out", OPT_OUT, '>', "Output file" },
48 { "outform", OPT_OUTFORM, 'F', "Output format - DER or PEM" },
49
50 OPT_PROV_OPTIONS,
51 { NULL }
52 };
53
crl2pkcs7_main(int argc,char ** argv)54 int crl2pkcs7_main(int argc, char **argv)
55 {
56 BIO *in = NULL, *out = NULL;
57 PKCS7 *p7 = NULL;
58 PKCS7_SIGNED *p7s = NULL;
59 STACK_OF(OPENSSL_STRING) *certflst = NULL;
60 STACK_OF(X509) *cert_stack = NULL;
61 STACK_OF(X509_CRL) *crl_stack = NULL;
62 X509_CRL *crl = NULL;
63 char *infile = NULL, *outfile = NULL, *prog, *certfile;
64 int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl = 0;
65 OPTION_CHOICE o;
66
67 prog = opt_init(argc, argv, crl2pkcs7_options);
68 while ((o = opt_next()) != OPT_EOF) {
69 switch (o) {
70 case OPT_EOF:
71 case OPT_ERR:
72 opthelp:
73 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
74 goto end;
75 case OPT_HELP:
76 opt_help(crl2pkcs7_options);
77 ret = 0;
78 goto end;
79 case OPT_INFORM:
80 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
81 goto opthelp;
82 break;
83 case OPT_OUTFORM:
84 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
85 goto opthelp;
86 break;
87 case OPT_IN:
88 infile = opt_arg();
89 break;
90 case OPT_OUT:
91 outfile = opt_arg();
92 break;
93 case OPT_NOCRL:
94 nocrl = 1;
95 break;
96 case OPT_CERTFILE:
97 if ((certflst == NULL)
98 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL)
99 goto end;
100 if (!sk_OPENSSL_STRING_push(certflst, opt_arg()))
101 goto end;
102 break;
103 case OPT_PROV_CASES:
104 if (!opt_provider(o))
105 goto end;
106 break;
107 }
108 }
109
110 /* No remaining args. */
111 if (!opt_check_rest_arg(NULL))
112 goto opthelp;
113
114 if (!nocrl) {
115 in = bio_open_default(infile, 'r', informat);
116 if (in == NULL)
117 goto end;
118
119 if (informat == FORMAT_ASN1)
120 crl = d2i_X509_CRL_bio(in, NULL);
121 else if (informat == FORMAT_PEM)
122 crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
123 if (crl == NULL) {
124 BIO_printf(bio_err, "unable to load CRL\n");
125 ERR_print_errors(bio_err);
126 goto end;
127 }
128 }
129
130 if ((p7 = PKCS7_new()) == NULL)
131 goto end;
132 if ((p7s = PKCS7_SIGNED_new()) == NULL)
133 goto end;
134 p7->type = OBJ_nid2obj(NID_pkcs7_signed);
135 p7->d.sign = p7s;
136 p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
137
138 if (!ASN1_INTEGER_set(p7s->version, 1))
139 goto end;
140
141 if (crl != NULL) {
142 if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
143 goto end;
144 p7s->crl = crl_stack;
145
146 if (!sk_X509_CRL_push(crl_stack, crl))
147 goto end;
148 crl = NULL; /* now part of p7 for OPENSSL_freeing */
149 }
150
151 if (certflst != NULL) {
152 if ((cert_stack = sk_X509_new_null()) == NULL)
153 goto end;
154 p7s->cert = cert_stack;
155
156 for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
157 certfile = sk_OPENSSL_STRING_value(certflst, i);
158 if (add_certs_from_file(cert_stack, certfile) < 0) {
159 BIO_printf(bio_err, "error loading certificates\n");
160 ERR_print_errors(bio_err);
161 goto end;
162 }
163 }
164 }
165
166 out = bio_open_default(outfile, 'w', outformat);
167 if (out == NULL)
168 goto end;
169
170 if (outformat == FORMAT_ASN1)
171 i = i2d_PKCS7_bio(out, p7);
172 else if (outformat == FORMAT_PEM)
173 i = PEM_write_bio_PKCS7(out, p7);
174 if (!i) {
175 BIO_printf(bio_err, "unable to write pkcs7 object\n");
176 ERR_print_errors(bio_err);
177 goto end;
178 }
179 ret = 0;
180 end:
181 sk_OPENSSL_STRING_free(certflst);
182 BIO_free(in);
183 BIO_free_all(out);
184 PKCS7_free(p7);
185 X509_CRL_free(crl);
186
187 return ret;
188 }
189
190 /*-
191 *----------------------------------------------------------------------
192 * int add_certs_from_file
193 *
194 * Read a list of certificates to be checked from a file.
195 *
196 * Results:
197 * number of certs added if successful, -1 if not.
198 *----------------------------------------------------------------------
199 */
add_certs_from_file(STACK_OF (X509)* stack,char * certfile)200 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
201 {
202 BIO *in = NULL;
203 int count = 0;
204 int ret = -1;
205 STACK_OF(X509_INFO) *sk = NULL;
206 X509_INFO *xi;
207
208 in = BIO_new_file(certfile, "r");
209 if (in == NULL) {
210 BIO_printf(bio_err, "error opening the file, %s\n", certfile);
211 goto end;
212 }
213
214 /* This loads from a file, a stack of x509/crl/pkey sets */
215 sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
216 if (sk == NULL) {
217 BIO_printf(bio_err, "error reading the file, %s\n", certfile);
218 goto end;
219 }
220
221 /* scan over it and pull out the CRL's */
222 while (sk_X509_INFO_num(sk)) {
223 xi = sk_X509_INFO_shift(sk);
224 if (xi->x509 != NULL) {
225 if (!sk_X509_push(stack, xi->x509)) {
226 X509_INFO_free(xi);
227 goto end;
228 }
229 xi->x509 = NULL;
230 count++;
231 }
232 X509_INFO_free(xi);
233 }
234
235 ret = count;
236 end:
237 /* never need to OPENSSL_free x */
238 BIO_free(in);
239 sk_X509_INFO_free(sk);
240 return ret;
241 }
242