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/*
* Copyright (c) 2018 Yubico AB. All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the LICENSE file.
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <fido.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "../openbsd-compat/openbsd-compat.h"
#include "extern.h"
static fido_cred_t *
prepare_cred(FILE *in_f, int type, int flags)
{
fido_cred_t *cred = NULL;
struct blob cdh;
struct blob authdata;
struct blob id;
struct blob sig;
struct blob x5c;
char *rpid = NULL;
char *fmt = NULL;
int r;
memset(&cdh, 0, sizeof(cdh));
memset(&authdata, 0, sizeof(authdata));
memset(&id, 0, sizeof(id));
memset(&sig, 0, sizeof(sig));
memset(&x5c, 0, sizeof(x5c));
r = base64_read(in_f, &cdh);
r |= string_read(in_f, &rpid);
r |= string_read(in_f, &fmt);
r |= base64_read(in_f, &authdata);
r |= base64_read(in_f, &id);
r |= base64_read(in_f, &sig);
if (r < 0)
errx(1, "input error");
(void)base64_read(in_f, &x5c);
if (flags & FLAG_DEBUG) {
fprintf(stderr, "client data hash:\n");
xxd(cdh.ptr, cdh.len);
fprintf(stderr, "relying party id: %s\n", rpid);
fprintf(stderr, "format: %s\n", fmt);
fprintf(stderr, "authenticator data:\n");
xxd(authdata.ptr, authdata.len);
fprintf(stderr, "credential id:\n");
xxd(id.ptr, id.len);
fprintf(stderr, "signature:\n");
xxd(sig.ptr, sig.len);
fprintf(stderr, "x509:\n");
xxd(x5c.ptr, x5c.len);
}
if ((cred = fido_cred_new()) == NULL)
errx(1, "fido_cred_new");
if ((r = fido_cred_set_type(cred, type)) != FIDO_OK ||
(r = fido_cred_set_clientdata_hash(cred, cdh.ptr,
cdh.len)) != FIDO_OK ||
(r = fido_cred_set_rp(cred, rpid, NULL)) != FIDO_OK ||
(r = fido_cred_set_authdata(cred, authdata.ptr,
authdata.len)) != FIDO_OK ||
(r = fido_cred_set_sig(cred, sig.ptr, sig.len)) != FIDO_OK ||
(r = fido_cred_set_fmt(cred, fmt)) != FIDO_OK)
errx(1, "fido_cred_set: %s", fido_strerr(r));
if (x5c.ptr != NULL) {
if ((r = fido_cred_set_x509(cred, x5c.ptr, x5c.len)) != FIDO_OK)
errx(1, "fido_cred_set_x509: %s", fido_strerr(r));
}
if (flags & FLAG_UV) {
if ((r = fido_cred_set_uv(cred, FIDO_OPT_TRUE)) != FIDO_OK)
errx(1, "fido_cred_set_uv: %s", fido_strerr(r));
}
if (flags & FLAG_HMAC) {
if ((r = fido_cred_set_extensions(cred,
FIDO_EXT_HMAC_SECRET)) != FIDO_OK)
errx(1, "fido_cred_set_extensions: %s", fido_strerr(r));
}
free(cdh.ptr);
free(authdata.ptr);
free(id.ptr);
free(sig.ptr);
free(x5c.ptr);
free(rpid);
free(fmt);
return (cred);
}
int
cred_verify(int argc, char **argv)
{
fido_cred_t *cred = NULL;
char *in_path = NULL;
char *out_path = NULL;
FILE *in_f = NULL;
FILE *out_f = NULL;
int type = COSE_ES256;
int flags = 0;
int cred_prot = -1;
int ch;
int r;
while ((ch = getopt(argc, argv, "c:dhi:o:v")) != -1) {
switch (ch) {
case 'c':
if ((cred_prot = base10(optarg)) < 0)
errx(1, "-c: invalid argument '%s'", optarg);
break;
case 'd':
flags |= FLAG_DEBUG;
break;
case 'h':
flags |= FLAG_HMAC;
break;
case 'i':
in_path = optarg;
break;
case 'o':
out_path = optarg;
break;
case 'v':
flags |= FLAG_UV;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 1)
usage();
in_f = open_read(in_path);
out_f = open_write(out_path);
if (argc > 0 && cose_type(argv[0], &type) < 0)
errx(1, "unknown type %s", argv[0]);
fido_init((flags & FLAG_DEBUG) ? FIDO_DEBUG : 0);
cred = prepare_cred(in_f, type, flags);
if (cred_prot > 0) {
r = fido_cred_set_prot(cred, cred_prot);
if (r != FIDO_OK) {
errx(1, "fido_cred_set_prot: %s", fido_strerr(r));
}
}
if (fido_cred_x5c_ptr(cred) == NULL) {
if ((r = fido_cred_verify_self(cred)) != FIDO_OK)
errx(1, "fido_cred_verify_self: %s", fido_strerr(r));
} else {
if ((r = fido_cred_verify(cred)) != FIDO_OK)
errx(1, "fido_cred_verify: %s", fido_strerr(r));
}
print_cred(out_f, type, cred);
fido_cred_free(&cred);
fclose(in_f);
fclose(out_f);
in_f = NULL;
out_f = NULL;
exit(0);
}
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