/*

* Copyright 1999-2023 The OpenSSL Project Authors. All Rights Reserved.

*

* Licensed under the Apache License 2.0 (the "License"). You may not use

* this file except in compliance with the License. You can obtain a copy

* in the file LICENSE in the source distribution or at

* https://www.openssl.org/source/license.html

*/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#include "apps.h"

#include "progs.h"

#include <openssl/bio.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

typedef enum OPTION_choice {

} OPTION_CHOICE;

const OPTIONS spkac_options[] = {

OPT_SECTION("General"),

{"help", OPT_HELP, '-', "Display this summary"},

{"spksect", OPT_SPKSECT, 's',

"Specify the name of an SPKAC-dedicated section of configuration"},

#ifndef OPENSSL_NO_ENGINE

{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},

#endif

OPT_SECTION("Input"),

{"in", OPT_IN, '<', "Input file"},

{"key", OPT_KEY, '<', "Create SPKAC using private key"},

{"keyform", OPT_KEYFORM, 'f', "Private key file format (ENGINE, other values ignored)"},

{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},

{"challenge", OPT_CHALLENGE, 's', "Challenge string"},

{"spkac", OPT_SPKAC, 's', "Alternative SPKAC name"},

OPT_SECTION("Output"),

{"digest", OPT_DIGEST, 's', "Sign new SPKAC with the specified digest (default: MD5)" },

{"out", OPT_OUT, '>', "Output file"},

{"noout", OPT_NOOUT, '-', "Don't print SPKAC"},

{"pubkey", OPT_PUBKEY, '-', "Output public key"},

{"verify", OPT_VERIFY, '-', "Verify SPKAC signature"},

OPT_PROV_OPTIONS,

{NULL}

};

int spkac_main(int argc, char **argv)

{

BIO *out = NULL;

CONF *conf = NULL;

ENGINE *e = NULL;

EVP_PKEY *pkey = NULL;

NETSCAPE_SPKI *spki = NULL;

char *challenge = NULL, *keyfile = NULL;

char *infile = NULL, *outfile = NULL, *passinarg = NULL, *passin = NULL;

char *spkstr = NULL, *prog;

const char *spkac = "SPKAC", *spksect = "default";

const char *digest = "MD5";

EVP_MD *md = NULL;

int i, ret = 1, verify = 0, noout = 0, pubkey = 0;

int keyformat = FORMAT_UNDEF;

OPTION_CHOICE o;

prog = opt_init(argc, argv, spkac_options);

while ((o = opt_next()) != OPT_EOF) {

switch (o) {

case OPT_EOF:

case OPT_ERR:

opthelp:

BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);

goto end;

case OPT_HELP:

opt_help(spkac_options);

ret = 0;

goto end;

case OPT_IN:

infile = opt_arg();

break;

case OPT_OUT:

outfile = opt_arg();

break;

case OPT_NOOUT:

noout = 1;

break;

case OPT_PUBKEY:

pubkey = 1;

break;

case OPT_VERIFY:

verify = 1;

break;

case OPT_PASSIN:

passinarg = opt_arg();

break;

case OPT_KEY:

keyfile = opt_arg();

break;

case OPT_KEYFORM:

if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))

goto opthelp;

break;

case OPT_CHALLENGE:

challenge = opt_arg();

break;

case OPT_SPKAC:

spkac = opt_arg();

break;

case OPT_SPKSECT:

spksect = opt_arg();

break;

case OPT_DIGEST:

digest = opt_arg();

break;

case OPT_ENGINE:

e = setup_engine(opt_arg(), 0);

break;

case OPT_PROV_CASES:

if (!opt_provider(o))

goto end;

break;

}

}

/* No extra arguments. */

if (!opt_check_rest_arg(NULL))

goto opthelp;

if (!app_passwd(passinarg, NULL, &passin, NULL)) {

BIO_printf(bio_err, "Error getting password\n");

goto end;

}

if (keyfile != NULL) {

if (!opt_md(digest, &md))

goto end;

pkey = load_key(strcmp(keyfile, "-") ? keyfile : NULL,

keyformat, 1, passin, e, "private key");

if (pkey == NULL)

goto end;

spki = NETSCAPE_SPKI_new();

if (spki == NULL)

goto end;

if (challenge != NULL

&& !ASN1_STRING_set(spki->spkac->challenge,

challenge, (int)strlen(challenge)))

goto end;

if (!NETSCAPE_SPKI_set_pubkey(spki, pkey)) {

BIO_printf(bio_err, "Error setting public key\n");

goto end;

}

i = NETSCAPE_SPKI_sign(spki, pkey, md);

if (i <= 0) {

BIO_printf(bio_err, "Error signing SPKAC\n");

goto end;

}

spkstr = NETSCAPE_SPKI_b64_encode(spki);

if (spkstr == NULL)

goto end;

out = bio_open_default(outfile, 'w', FORMAT_TEXT);

if (out == NULL) {

OPENSSL_free(spkstr);

goto end;

}

BIO_printf(out, "SPKAC=%s\n", spkstr);

OPENSSL_free(spkstr);

ret = 0;

goto end;

}

if ((conf = app_load_config(infile)) == NULL)

goto end;

spkstr = NCONF_get_string(conf, spksect, spkac);

if (spkstr == NULL) {

BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);

ERR_print_errors(bio_err);

goto end;

}

spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);

if (spki == NULL) {

BIO_printf(bio_err, "Error loading SPKAC\n");

ERR_print_errors(bio_err);

goto end;

}

out = bio_open_default(outfile, 'w', FORMAT_TEXT);

if (out == NULL)

goto end;

if (!noout)

NETSCAPE_SPKI_print(out, spki);

pkey = NETSCAPE_SPKI_get_pubkey(spki);

if (verify) {

i = NETSCAPE_SPKI_verify(spki, pkey);

if (i > 0) {

BIO_printf(bio_err, "Signature OK\n");

} else {

BIO_printf(bio_err, "Signature Failure\n");

ERR_print_errors(bio_err);

goto end;

}

}

if (pubkey)

PEM_write_bio_PUBKEY(out, pkey);

ret = 0;

end:

EVP_MD_free(md);

NCONF_free(conf);

NETSCAPE_SPKI_free(spki);

BIO_free_all(out);

EVP_PKEY_free(pkey);

release_engine(e);

OPENSSL_free(passin);

return ret;

}