1/*
2 * Copyright 1999-2018 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 <time.h>
14#include "apps.h"
15#include "progs.h"
16#include <openssl/bio.h>
17#include <openssl/conf.h>
18#include <openssl/err.h>
19#include <openssl/evp.h>
20#include <openssl/x509.h>
21#include <openssl/pem.h>
22
23typedef enum OPTION_choice {
24    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
25    OPT_NOOUT, OPT_PUBKEY, OPT_VERIFY, OPT_IN, OPT_OUT,
26    OPT_ENGINE, OPT_KEY, OPT_CHALLENGE, OPT_PASSIN, OPT_SPKAC,
27    OPT_SPKSECT, OPT_KEYFORM
28} OPTION_CHOICE;
29
30const OPTIONS spkac_options[] = {
31    {"help", OPT_HELP, '-', "Display this summary"},
32    {"in", OPT_IN, '<', "Input file"},
33    {"out", OPT_OUT, '>', "Output file"},
34    {"key", OPT_KEY, '<', "Create SPKAC using private key"},
35    {"keyform", OPT_KEYFORM, 'f', "Private key file format - default PEM (PEM, DER, or ENGINE)"},
36    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
37    {"challenge", OPT_CHALLENGE, 's', "Challenge string"},
38    {"spkac", OPT_SPKAC, 's', "Alternative SPKAC name"},
39    {"noout", OPT_NOOUT, '-', "Don't print SPKAC"},
40    {"pubkey", OPT_PUBKEY, '-', "Output public key"},
41    {"verify", OPT_VERIFY, '-', "Verify SPKAC signature"},
42    {"spksect", OPT_SPKSECT, 's',
43     "Specify the name of an SPKAC-dedicated section of configuration"},
44#ifndef OPENSSL_NO_ENGINE
45    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
46#endif
47    {NULL}
48};
49
50int spkac_main(int argc, char **argv)
51{
52    BIO *out = NULL;
53    CONF *conf = NULL;
54    ENGINE *e = NULL;
55    EVP_PKEY *pkey = NULL;
56    NETSCAPE_SPKI *spki = NULL;
57    char *challenge = NULL, *keyfile = NULL;
58    char *infile = NULL, *outfile = NULL, *passinarg = NULL, *passin = NULL;
59    char *spkstr = NULL, *prog;
60    const char *spkac = "SPKAC", *spksect = "default";
61    int i, ret = 1, verify = 0, noout = 0, pubkey = 0;
62    int keyformat = FORMAT_PEM;
63    OPTION_CHOICE o;
64
65    prog = opt_init(argc, argv, spkac_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(spkac_options);
75            ret = 0;
76            goto end;
77        case OPT_IN:
78            infile = opt_arg();
79            break;
80        case OPT_OUT:
81            outfile = opt_arg();
82            break;
83        case OPT_NOOUT:
84            noout = 1;
85            break;
86        case OPT_PUBKEY:
87            pubkey = 1;
88            break;
89        case OPT_VERIFY:
90            verify = 1;
91            break;
92        case OPT_PASSIN:
93            passinarg = opt_arg();
94            break;
95        case OPT_KEY:
96            keyfile = opt_arg();
97            break;
98        case OPT_KEYFORM:
99            if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
100                goto opthelp;
101            break;
102        case OPT_CHALLENGE:
103            challenge = opt_arg();
104            break;
105        case OPT_SPKAC:
106            spkac = opt_arg();
107            break;
108        case OPT_SPKSECT:
109            spksect = opt_arg();
110            break;
111        case OPT_ENGINE:
112            e = setup_engine(opt_arg(), 0);
113            break;
114        }
115    }
116    argc = opt_num_rest();
117    if (argc != 0)
118        goto opthelp;
119
120    if (!app_passwd(passinarg, NULL, &passin, NULL)) {
121        BIO_printf(bio_err, "Error getting password\n");
122        goto end;
123    }
124
125    if (keyfile != NULL) {
126        pkey = load_key(strcmp(keyfile, "-") ? keyfile : NULL,
127                        keyformat, 1, passin, e, "private key");
128        if (pkey == NULL)
129            goto end;
130        spki = NETSCAPE_SPKI_new();
131        if (spki == NULL)
132            goto end;
133        if (challenge != NULL)
134            ASN1_STRING_set(spki->spkac->challenge,
135                            challenge, (int)strlen(challenge));
136        NETSCAPE_SPKI_set_pubkey(spki, pkey);
137        NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
138        spkstr = NETSCAPE_SPKI_b64_encode(spki);
139        if (spkstr == NULL)
140            goto end;
141
142        out = bio_open_default(outfile, 'w', FORMAT_TEXT);
143        if (out == NULL) {
144            OPENSSL_free(spkstr);
145            goto end;
146        }
147        BIO_printf(out, "SPKAC=%s\n", spkstr);
148        OPENSSL_free(spkstr);
149        ret = 0;
150        goto end;
151    }
152
153    if ((conf = app_load_config(infile)) == NULL)
154        goto end;
155
156    spkstr = NCONF_get_string(conf, spksect, spkac);
157
158    if (spkstr == NULL) {
159        BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
160        ERR_print_errors(bio_err);
161        goto end;
162    }
163
164    spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);
165
166    if (spki == NULL) {
167        BIO_printf(bio_err, "Error loading SPKAC\n");
168        ERR_print_errors(bio_err);
169        goto end;
170    }
171
172    out = bio_open_default(outfile, 'w', FORMAT_TEXT);
173    if (out == NULL)
174        goto end;
175
176    if (!noout)
177        NETSCAPE_SPKI_print(out, spki);
178    pkey = NETSCAPE_SPKI_get_pubkey(spki);
179    if (verify) {
180        i = NETSCAPE_SPKI_verify(spki, pkey);
181        if (i > 0) {
182            BIO_printf(bio_err, "Signature OK\n");
183        } else {
184            BIO_printf(bio_err, "Signature Failure\n");
185            ERR_print_errors(bio_err);
186            goto end;
187        }
188    }
189    if (pubkey)
190        PEM_write_bio_PUBKEY(out, pkey);
191
192    ret = 0;
193
194 end:
195    NCONF_free(conf);
196    NETSCAPE_SPKI_free(spki);
197    BIO_free_all(out);
198    EVP_PKEY_free(pkey);
199    release_engine(e);
200    OPENSSL_free(passin);
201    return ret;
202}
203