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 <stdlib.h>
12#include <string.h>
13#include <time.h>
14#include "apps.h"
15#include "progs.h"
16#include <openssl/err.h>
17#include <openssl/objects.h>
18#include <openssl/evp.h>
19#include <openssl/x509.h>
20#include <openssl/pkcs7.h>
21#include <openssl/pem.h>
22
23typedef enum OPTION_choice {
24    OPT_COMMON,
25    OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOOUT,
26    OPT_TEXT, OPT_PRINT, OPT_PRINT_CERTS, OPT_ENGINE,
27    OPT_PROV_ENUM
28} OPTION_CHOICE;
29
30const OPTIONS pkcs7_options[] = {
31    OPT_SECTION("General"),
32    {"help", OPT_HELP, '-', "Display this summary"},
33#ifndef OPENSSL_NO_ENGINE
34    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
35#endif
36
37    OPT_SECTION("Input"),
38    {"in", OPT_IN, '<', "Input file"},
39    {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
40
41    OPT_SECTION("Output"),
42    {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
43    {"out", OPT_OUT, '>', "Output file"},
44    {"noout", OPT_NOOUT, '-', "Don't output encoded data"},
45    {"text", OPT_TEXT, '-', "Print full details of certificates"},
46    {"print", OPT_PRINT, '-', "Print out all fields of the PKCS7 structure"},
47    {"print_certs", OPT_PRINT_CERTS, '-',
48     "Print_certs  print any certs or crl in the input"},
49
50    OPT_PROV_OPTIONS,
51    {NULL}
52};
53
54int pkcs7_main(int argc, char **argv)
55{
56    ENGINE *e = NULL;
57    PKCS7 *p7 = NULL, *p7i;
58    BIO *in = NULL, *out = NULL;
59    int informat = FORMAT_PEM, outformat = FORMAT_PEM;
60    char *infile = NULL, *outfile = NULL, *prog;
61    int i, print_certs = 0, text = 0, noout = 0, p7_print = 0, ret = 1;
62    OPTION_CHOICE o;
63    OSSL_LIB_CTX *libctx = app_get0_libctx();
64
65    prog = opt_init(argc, argv, pkcs7_options);
66    while ((o = opt_next()) != OPT_EOF) {
67        switch (o) {
68        case OPT_EOF:
69        case OPT_ERR:
70 opthelp:
71            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
72            goto end;
73        case OPT_HELP:
74            opt_help(pkcs7_options);
75            ret = 0;
76            goto end;
77        case OPT_INFORM:
78            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
79                goto opthelp;
80            break;
81        case OPT_OUTFORM:
82            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
83                goto opthelp;
84            break;
85        case OPT_IN:
86            infile = opt_arg();
87            break;
88        case OPT_OUT:
89            outfile = opt_arg();
90            break;
91        case OPT_NOOUT:
92            noout = 1;
93            break;
94        case OPT_TEXT:
95            text = 1;
96            break;
97        case OPT_PRINT:
98            p7_print = 1;
99            break;
100        case OPT_PRINT_CERTS:
101            print_certs = 1;
102            break;
103        case OPT_ENGINE:
104            e = setup_engine(opt_arg(), 0);
105            break;
106        case OPT_PROV_CASES:
107            if (!opt_provider(o))
108                goto end;
109            break;
110        }
111    }
112
113    /* No extra arguments. */
114    argc = opt_num_rest();
115    if (argc != 0)
116        goto opthelp;
117
118    in = bio_open_default(infile, 'r', informat);
119    if (in == NULL)
120        goto end;
121
122    p7 = PKCS7_new_ex(libctx, app_get0_propq());
123    if (p7 == NULL) {
124        BIO_printf(bio_err, "unable to allocate PKCS7 object\n");
125        ERR_print_errors(bio_err);
126        goto end;
127    }
128
129    if (informat == FORMAT_ASN1)
130        p7i = d2i_PKCS7_bio(in, &p7);
131    else
132        p7i = PEM_read_bio_PKCS7(in, &p7, NULL, NULL);
133    if (p7i == NULL) {
134        BIO_printf(bio_err, "unable to load PKCS7 object\n");
135        ERR_print_errors(bio_err);
136        goto end;
137    }
138
139    out = bio_open_default(outfile, 'w', outformat);
140    if (out == NULL)
141        goto end;
142
143    if (p7_print)
144        PKCS7_print_ctx(out, p7, 0, NULL);
145
146    if (print_certs) {
147        STACK_OF(X509) *certs = NULL;
148        STACK_OF(X509_CRL) *crls = NULL;
149
150        i = OBJ_obj2nid(p7->type);
151        switch (i) {
152        case NID_pkcs7_signed:
153            if (p7->d.sign != NULL) {
154                certs = p7->d.sign->cert;
155                crls = p7->d.sign->crl;
156            }
157            break;
158        case NID_pkcs7_signedAndEnveloped:
159            if (p7->d.signed_and_enveloped != NULL) {
160                certs = p7->d.signed_and_enveloped->cert;
161                crls = p7->d.signed_and_enveloped->crl;
162            }
163            break;
164        default:
165            break;
166        }
167
168        if (certs != NULL) {
169            X509 *x;
170
171            for (i = 0; i < sk_X509_num(certs); i++) {
172                x = sk_X509_value(certs, i);
173                if (text)
174                    X509_print(out, x);
175                else
176                    dump_cert_text(out, x);
177
178                if (!noout)
179                    PEM_write_bio_X509(out, x);
180                BIO_puts(out, "\n");
181            }
182        }
183        if (crls != NULL) {
184            X509_CRL *crl;
185
186            for (i = 0; i < sk_X509_CRL_num(crls); i++) {
187                crl = sk_X509_CRL_value(crls, i);
188
189                X509_CRL_print_ex(out, crl, get_nameopt());
190
191                if (!noout)
192                    PEM_write_bio_X509_CRL(out, crl);
193                BIO_puts(out, "\n");
194            }
195        }
196
197        ret = 0;
198        goto end;
199    }
200
201    if (!noout) {
202        if (outformat == FORMAT_ASN1)
203            i = i2d_PKCS7_bio(out, p7);
204        else
205            i = PEM_write_bio_PKCS7(out, p7);
206
207        if (!i) {
208            BIO_printf(bio_err, "unable to write pkcs7 object\n");
209            ERR_print_errors(bio_err);
210            goto end;
211        }
212    }
213    ret = 0;
214 end:
215    PKCS7_free(p7);
216    release_engine(e);
217    BIO_free(in);
218    BIO_free_all(out);
219    return ret;
220}
221