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/*
* 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 {
OPT_COMMON,
OPT_NOOUT, OPT_PUBKEY, OPT_VERIFY, OPT_IN, OPT_OUT,
OPT_ENGINE, OPT_KEY, OPT_CHALLENGE, OPT_PASSIN, OPT_SPKAC,
OPT_SPKSECT, OPT_KEYFORM, OPT_DIGEST,
OPT_PROV_ENUM
} 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;
}
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