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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.
*/
#include <openssl/ec.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../openbsd-compat/openbsd-compat.h"
#include "fido.h"
/*
* Pretty-print a device's capabilities flags and return the result.
*/
static void
format_flags(char *ret, size_t retlen, uint8_t flags)
{
memset(ret, 0, retlen);
if (flags & FIDO_CAP_WINK) {
if (strlcat(ret, "wink,", retlen) >= retlen)
goto toolong;
} else {
if (strlcat(ret, "nowink,", retlen) >= retlen)
goto toolong;
}
if (flags & FIDO_CAP_CBOR) {
if (strlcat(ret, " cbor,", retlen) >= retlen)
goto toolong;
} else {
if (strlcat(ret, " nocbor,", retlen) >= retlen)
goto toolong;
}
if (flags & FIDO_CAP_NMSG) {
if (strlcat(ret, " nomsg", retlen) >= retlen)
goto toolong;
} else {
if (strlcat(ret, " msg", retlen) >= retlen)
goto toolong;
}
return;
toolong:
strlcpy(ret, "toolong", retlen);
}
/*
* Print a FIDO device's attributes on stdout.
*/
static void
print_attr(const fido_dev_t *dev)
{
char flags_txt[128];
printf("proto: 0x%02x\n", fido_dev_protocol(dev));
printf("major: 0x%02x\n", fido_dev_major(dev));
printf("minor: 0x%02x\n", fido_dev_minor(dev));
printf("build: 0x%02x\n", fido_dev_build(dev));
format_flags(flags_txt, sizeof(flags_txt), fido_dev_flags(dev));
printf("caps: 0x%02x (%s)\n", fido_dev_flags(dev), flags_txt);
}
/*
* Auxiliary function to print an array of strings on stdout.
*/
static void
print_str_array(const char *label, char * const *sa, size_t len)
{
if (len == 0)
return;
printf("%s strings: ", label);
for (size_t i = 0; i < len; i++)
printf("%s%s", i > 0 ? ", " : "", sa[i]);
printf("\n");
}
/*
* Auxiliary function to print (char *, bool) pairs on stdout.
*/
static void
print_opt_array(const char *label, char * const *name, const bool *value,
size_t len)
{
if (len == 0)
return;
printf("%s: ", label);
for (size_t i = 0; i < len; i++)
printf("%s%s%s", i > 0 ? ", " : "",
value[i] ? "" : "no", name[i]);
printf("\n");
}
/*
* Auxiliary function to print an authenticator's AAGUID on stdout.
*/
static void
print_aaguid(const unsigned char *buf, size_t buflen)
{
printf("aaguid: ");
while (buflen--)
printf("%02x", *buf++);
printf("\n");
}
/*
* Auxiliary function to print an authenticator's maximum message size on
* stdout.
*/
static void
print_maxmsgsiz(uint64_t maxmsgsiz)
{
printf("maxmsgsiz: %d\n", (int)maxmsgsiz);
}
/*
* Auxiliary function to print an authenticator's firmware version on stdout.
*/
static void
print_fwversion(uint64_t fwversion)
{
printf("fwversion: 0x%x\n", (int)fwversion);
}
/*
* Auxiliary function to print an array of bytes on stdout.
*/
static void
print_byte_array(const char *label, const uint8_t *ba, size_t len)
{
if (len == 0)
return;
printf("%s: ", label);
for (size_t i = 0; i < len; i++)
printf("%s%u", i > 0 ? ", " : "", (unsigned)ba[i]);
printf("\n");
}
static void
getinfo(const char *path)
{
fido_dev_t *dev;
fido_cbor_info_t *ci;
int r;
fido_init(0);
if ((dev = fido_dev_new()) == NULL)
errx(1, "fido_dev_new");
if ((r = fido_dev_open(dev, path)) != FIDO_OK)
errx(1, "fido_dev_open: %s (0x%x)", fido_strerr(r), r);
print_attr(dev);
if (fido_dev_is_fido2(dev) == false)
goto end;
if ((ci = fido_cbor_info_new()) == NULL)
errx(1, "fido_cbor_info_new");
if ((r = fido_dev_get_cbor_info(dev, ci)) != FIDO_OK)
errx(1, "fido_dev_get_cbor_info: %s (0x%x)", fido_strerr(r), r);
/* print supported protocol versions */
print_str_array("version", fido_cbor_info_versions_ptr(ci),
fido_cbor_info_versions_len(ci));
/* print supported extensions */
print_str_array("extension", fido_cbor_info_extensions_ptr(ci),
fido_cbor_info_extensions_len(ci));
/* print aaguid */
print_aaguid(fido_cbor_info_aaguid_ptr(ci),
fido_cbor_info_aaguid_len(ci));
/* print supported options */
print_opt_array("options", fido_cbor_info_options_name_ptr(ci),
fido_cbor_info_options_value_ptr(ci),
fido_cbor_info_options_len(ci));
/* print maximum message size */
print_maxmsgsiz(fido_cbor_info_maxmsgsiz(ci));
/* print firmware version */
print_fwversion(fido_cbor_info_fwversion(ci));
/* print supported pin protocols */
print_byte_array("pin protocols", fido_cbor_info_protocols_ptr(ci),
fido_cbor_info_protocols_len(ci));
fido_cbor_info_free(&ci);
end:
if ((r = fido_dev_close(dev)) != FIDO_OK)
errx(1, "fido_dev_close: %s (0x%x)", fido_strerr(r), r);
fido_dev_free(&dev);
}
int
main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "usage: info <device>\n");
exit(EXIT_FAILURE);
}
getinfo(argv[1]);
exit(0);
}
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