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homed: turn libfido2 into a dlopen() type dependency

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This commit is contained in:
Lennart Poettering 2020-11-25 15:07:06 +01:00
parent b8c80b56d1
commit 69cb28965b
6 changed files with 313 additions and 106 deletions
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4
meson.build
View File

@ -2271,8 +2271,7 @@ if conf.get('ENABLE_HOMED') == 1
libcrypt,
libopenssl,
libfdisk,
libp11kit,
libfido2],
libp11kit],
install_rpath : rootlibexecdir,
install : true,
install_dir : rootlibexecdir)
@ -2298,7 +2297,6 @@ if conf.get('ENABLE_HOMED') == 1
libcrypt,
libopenssl,
libp11kit,
libfido2,
libdl],
install_rpath : rootlibexecdir,
install : true,

147
src/home/homectl-fido2.c
View File

@ -11,6 +11,7 @@
#include "homectl-fido2.h"
#include "homectl-pkcs11.h"
#include "libcrypt-util.h"
#include "libfido2-util.h"
#include "locale-util.h"
#include "memory-util.h"
#include "random-util.h"
@ -116,11 +117,11 @@ int identity_add_fido2_parameters(
const char *device) {
#if HAVE_LIBFIDO2
_cleanup_(fido_cbor_info_free) fido_cbor_info_t *di = NULL;
_cleanup_(fido_assert_free) fido_assert_t *a = NULL;
_cleanup_(fido_cbor_info_free_wrapper) fido_cbor_info_t *di = NULL;
_cleanup_(fido_assert_free_wrapper) fido_assert_t *a = NULL;
_cleanup_(fido_cred_free_wrapper) fido_cred_t *c = NULL;
_cleanup_(fido_dev_free_wrapper) fido_dev_t *d = NULL;
_cleanup_(erase_and_freep) char *used_pin = NULL;
_cleanup_(fido_cred_free) fido_cred_t *c = NULL;
_cleanup_(fido_dev_free) fido_dev_t *d = NULL;
_cleanup_(erase_and_freep) void *salt = NULL;
JsonVariant *un, *realm, *rn;
bool found_extension = false;
@ -146,6 +147,10 @@ int identity_add_fido2_parameters(
assert(v);
assert(device);
r = dlopen_libfido2();
if (r < 0)
return log_error_errno(r, "FIDO2 token support is not installed.");
salt = malloc(FIDO2_SALT_SIZE);
if (!salt)
return log_oom();
@ -154,30 +159,30 @@ int identity_add_fido2_parameters(
if (r < 0)
return log_error_errno(r, "Failed to generate salt: %m");
d = fido_dev_new();
d = sym_fido_dev_new();
if (!d)
return log_oom();
r = fido_dev_open(d, device);
r = sym_fido_dev_open(d, device);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to open FIDO2 device %s: %s", device, fido_strerr(r));
"Failed to open FIDO2 device %s: %s", device, sym_fido_strerr(r));
if (!fido_dev_is_fido2(d))
if (!sym_fido_dev_is_fido2(d))
return log_error_errno(SYNTHETIC_ERRNO(ENODEV),
"Specified device %s is not a FIDO2 device.", device);
di = fido_cbor_info_new();
di = sym_fido_cbor_info_new();
if (!di)
return log_oom();
r = fido_dev_get_cbor_info(d, di);
r = sym_fido_dev_get_cbor_info(d, di);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to get CBOR device info for %s: %s", device, fido_strerr(r));
"Failed to get CBOR device info for %s: %s", device, sym_fido_strerr(r));
e = fido_cbor_info_extensions_ptr(di);
n = fido_cbor_info_extensions_len(di);
e = sym_fido_cbor_info_extensions_ptr(di);
n = sym_fido_cbor_info_extensions_len(di);
for (size_t i = 0; i < n; i++)
if (streq(e[i], "hmac-secret")) {
@ -189,24 +194,24 @@ int identity_add_fido2_parameters(
return log_error_errno(SYNTHETIC_ERRNO(ENODEV),
"Specified device %s is a FIDO2 device, but does not support the required HMAC-SECRET extension.", device);
c = fido_cred_new();
c = sym_fido_cred_new();
if (!c)
return log_oom();
r = fido_cred_set_extensions(c, FIDO_EXT_HMAC_SECRET);
r = sym_fido_cred_set_extensions(c, FIDO_EXT_HMAC_SECRET);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to enable HMAC-SECRET extension on FIDO2 credential: %s", fido_strerr(r));
"Failed to enable HMAC-SECRET extension on FIDO2 credential: %s", sym_fido_strerr(r));
r = fido_cred_set_rp(c, "io.systemd.home", "Home Directory");
r = sym_fido_cred_set_rp(c, "io.systemd.home", "Home Directory");
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 credential relying party ID/name: %s", fido_strerr(r));
"Failed to set FIDO2 credential relying party ID/name: %s", sym_fido_strerr(r));
r = fido_cred_set_type(c, COSE_ES256);
r = sym_fido_cred_set_type(c, COSE_ES256);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 credential type to ES256: %s", fido_strerr(r));
"Failed to set FIDO2 credential type to ES256: %s", sym_fido_strerr(r));
un = json_variant_by_key(*v, "userName");
if (!un)
@ -231,29 +236,29 @@ int identity_add_fido2_parameters(
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"realName field of user record is not a string");
r = fido_cred_set_user(c,
r = sym_fido_cred_set_user(c,
(const unsigned char*) fido_un, strlen(fido_un), /* We pass the user ID and name as the same */
fido_un,
rn ? json_variant_string(rn) : NULL,
NULL /* icon URL */);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 credential user data: %s", fido_strerr(r));
"Failed to set FIDO2 credential user data: %s", sym_fido_strerr(r));
r = fido_cred_set_clientdata_hash(c, (const unsigned char[32]) {}, 32);
r = sym_fido_cred_set_clientdata_hash(c, (const unsigned char[32]) {}, 32);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 client data hash: %s", fido_strerr(r));
"Failed to set FIDO2 client data hash: %s", sym_fido_strerr(r));
r = fido_cred_set_rk(c, FIDO_OPT_FALSE);
r = sym_fido_cred_set_rk(c, FIDO_OPT_FALSE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to turn off FIDO2 resident key option of credential: %s", fido_strerr(r));
"Failed to turn off FIDO2 resident key option of credential: %s", sym_fido_strerr(r));
r = fido_cred_set_uv(c, FIDO_OPT_FALSE);
r = sym_fido_cred_set_uv(c, FIDO_OPT_FALSE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to turn off FIDO2 user verification option of credential: %s", fido_strerr(r));
"Failed to turn off FIDO2 user verification option of credential: %s", sym_fido_strerr(r));
log_info("Initializing FIDO2 credential on security token.");
@ -261,7 +266,7 @@ int identity_add_fido2_parameters(
emoji_enabled() ? special_glyph(SPECIAL_GLYPH_TOUCH) : "",
emoji_enabled() ? " " : "");
r = fido_dev_make_cred(d, c, NULL);
r = sym_fido_dev_make_cred(d, c, NULL);
if (r == FIDO_ERR_PIN_REQUIRED) {
_cleanup_free_ char *text = NULL;
@ -283,7 +288,7 @@ int identity_add_fido2_parameters(
continue;
}
r = fido_dev_make_cred(d, c, *i);
r = sym_fido_dev_make_cred(d, c, *i);
if (r == FIDO_OK) {
used_pin = strdup(*i);
if (!used_pin)
@ -308,75 +313,75 @@ int identity_add_fido2_parameters(
"Token action timeout. (User didn't interact with token quickly enough.)");
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to generate FIDO2 credential: %s", fido_strerr(r));
"Failed to generate FIDO2 credential: %s", sym_fido_strerr(r));
cid = fido_cred_id_ptr(c);
cid = sym_fido_cred_id_ptr(c);
if (!cid)
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to get FIDO2 credential ID.");
cid_size = fido_cred_id_len(c);
cid_size = sym_fido_cred_id_len(c);
a = fido_assert_new();
a = sym_fido_assert_new();
if (!a)
return log_oom();
r = fido_assert_set_extensions(a, FIDO_EXT_HMAC_SECRET);
r = sym_fido_assert_set_extensions(a, FIDO_EXT_HMAC_SECRET);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to enable HMAC-SECRET extension on FIDO2 assertion: %s", fido_strerr(r));
"Failed to enable HMAC-SECRET extension on FIDO2 assertion: %s", sym_fido_strerr(r));
r = fido_assert_set_hmac_salt(a, salt, FIDO2_SALT_SIZE);
r = sym_fido_assert_set_hmac_salt(a, salt, FIDO2_SALT_SIZE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set salt on FIDO2 assertion: %s", fido_strerr(r));
"Failed to set salt on FIDO2 assertion: %s", sym_fido_strerr(r));
r = fido_assert_set_rp(a, "io.systemd.home");
r = sym_fido_assert_set_rp(a, "io.systemd.home");
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 assertion ID: %s", fido_strerr(r));
"Failed to set FIDO2 assertion ID: %s", sym_fido_strerr(r));
r = fido_assert_set_clientdata_hash(a, (const unsigned char[32]) {}, 32);
r = sym_fido_assert_set_clientdata_hash(a, (const unsigned char[32]) {}, 32);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 assertion client data hash: %s", fido_strerr(r));
"Failed to set FIDO2 assertion client data hash: %s", sym_fido_strerr(r));
r = fido_assert_allow_cred(a, cid, cid_size);
r = sym_fido_assert_allow_cred(a, cid, cid_size);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to add FIDO2 assertion credential ID: %s", fido_strerr(r));
"Failed to add FIDO2 assertion credential ID: %s", sym_fido_strerr(r));
r = fido_assert_set_up(a, FIDO_OPT_FALSE);
r = sym_fido_assert_set_up(a, FIDO_OPT_FALSE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to turn off FIDO2 assertion user presence: %s", fido_strerr(r));
"Failed to turn off FIDO2 assertion user presence: %s", sym_fido_strerr(r));
log_info("Generating secret key on FIDO2 security token.");
r = fido_dev_get_assert(d, a, used_pin);
r = sym_fido_dev_get_assert(d, a, used_pin);
if (r == FIDO_ERR_UP_REQUIRED) {
r = fido_assert_set_up(a, FIDO_OPT_TRUE);
r = sym_fido_assert_set_up(a, FIDO_OPT_TRUE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to turn on FIDO2 assertion user presence: %s", fido_strerr(r));
"Failed to turn on FIDO2 assertion user presence: %s", sym_fido_strerr(r));
log_notice("%s%sIn order to allow secret key generation, please verify presence on security token.",
emoji_enabled() ? special_glyph(SPECIAL_GLYPH_TOUCH) : "",
emoji_enabled() ? " " : "");
r = fido_dev_get_assert(d, a, used_pin);
r = sym_fido_dev_get_assert(d, a, used_pin);
}
if (r == FIDO_ERR_ACTION_TIMEOUT)
return log_error_errno(SYNTHETIC_ERRNO(ENOSTR),
"Token action timeout. (User didn't interact with token quickly enough.)");
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to ask token for assertion: %s", fido_strerr(r));
"Failed to ask token for assertion: %s", sym_fido_strerr(r));
secret = fido_assert_hmac_secret_ptr(a, 0);
secret = sym_fido_assert_hmac_secret_ptr(a, 0);
if (!secret)
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve HMAC secret.");
secret_size = fido_assert_hmac_secret_len(a, 0);
secret_size = sym_fido_assert_hmac_secret_len(a, 0);
r = add_fido2_credential_id(v, cid, cid_size);
if (r < 0)
@ -413,11 +418,15 @@ int list_fido2_devices(void) {
fido_dev_info_t *di = NULL;
int r;
di = fido_dev_info_new(allocated);
r = dlopen_libfido2();
if (r < 0)
return log_error_errno(r, "FIDO2 token support is not installed.");
di = sym_fido_dev_info_new(allocated);
if (!di)
return log_oom();
r = fido_dev_info_manifest(di, allocated, &found);
r = sym_fido_dev_info_manifest(di, allocated, &found);
if (r == FIDO_ERR_INTERNAL || (r == FIDO_OK && found == 0)) {
/* The library returns FIDO_ERR_INTERNAL when no devices are found. I wish it wouldn't. */
log_info("No FIDO2 devices found.");
@ -425,7 +434,7 @@ int list_fido2_devices(void) {
goto finish;
}
if (r != FIDO_OK) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", fido_strerr(r));
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", sym_fido_strerr(r));
goto finish;
}
@ -438,7 +447,7 @@ int list_fido2_devices(void) {
for (size_t i = 0; i < found; i++) {
const fido_dev_info_t *entry;
entry = fido_dev_info_ptr(di, i);
entry = sym_fido_dev_info_ptr(di, i);
if (!entry) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to get device information for FIDO device %zu.", i);
@ -447,9 +456,9 @@ int list_fido2_devices(void) {
r = table_add_many(
t,
TABLE_PATH, fido_dev_info_path(entry),
TABLE_STRING, fido_dev_info_manufacturer_string(entry),
TABLE_STRING, fido_dev_info_product_string(entry));
TABLE_PATH, sym_fido_dev_info_path(entry),
TABLE_STRING, sym_fido_dev_info_manufacturer_string(entry),
TABLE_STRING, sym_fido_dev_info_product_string(entry));
if (r < 0) {
table_log_add_error(r);
goto finish;
@ -465,7 +474,7 @@ int list_fido2_devices(void) {
r = 0;
finish:
fido_dev_info_free(&di, allocated);
sym_fido_dev_info_free(&di, allocated);
return r;
#else
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
@ -482,18 +491,22 @@ int find_fido2_auto(char **ret) {
const char *path;
int r;
di = fido_dev_info_new(di_size);
r = dlopen_libfido2();
if (r < 0)
return log_error_errno(r, "FIDO2 token support is not installed.");
di = sym_fido_dev_info_new(di_size);
if (!di)
return log_oom();
r = fido_dev_info_manifest(di, di_size, &found);
r = sym_fido_dev_info_manifest(di, di_size, &found);
if (r == FIDO_ERR_INTERNAL || (r == FIDO_OK && found == 0)) {
/* The library returns FIDO_ERR_INTERNAL when no devices are found. I wish it wouldn't. */
r = log_error_errno(SYNTHETIC_ERRNO(ENODEV), "No FIDO2 devices found.");
goto finish;
}
if (r != FIDO_OK) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", fido_strerr(r));
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", sym_fido_strerr(r));
goto finish;
}
if (found > 1) {
@ -501,14 +514,14 @@ int find_fido2_auto(char **ret) {
goto finish;
}
entry = fido_dev_info_ptr(di, 0);
entry = sym_fido_dev_info_ptr(di, 0);
if (!entry) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to get device information for FIDO device 0.");
goto finish;
}
path = fido_dev_info_path(entry);
path = sym_fido_dev_info_path(entry);
if (!path) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to query FIDO device path.");
@ -525,7 +538,7 @@ int find_fido2_auto(char **ret) {
r = 0;
finish:
fido_dev_info_free(&di, di_size);
sym_fido_dev_info_free(&di, di_size);
return r;
#else
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),

77
src/home/homework-fido2.c
View File

@ -4,6 +4,7 @@
#include "hexdecoct.h"
#include "homework-fido2.h"
#include "libfido2-util.h"
#include "strv.h"
static int fido2_use_specific_token(
@ -13,39 +14,39 @@ static int fido2_use_specific_token(
const Fido2HmacSalt *salt,
char **ret) {
_cleanup_(fido_cbor_info_free) fido_cbor_info_t *di = NULL;
_cleanup_(fido_assert_free) fido_assert_t *a = NULL;
_cleanup_(fido_dev_free) fido_dev_t *d = NULL;
_cleanup_(fido_cbor_info_free_wrapper) fido_cbor_info_t *di = NULL;
_cleanup_(fido_assert_free_wrapper) fido_assert_t *a = NULL;
_cleanup_(fido_dev_free_wrapper) fido_dev_t *d = NULL;
bool found_extension = false;
size_t n, hmac_size;
const void *hmac;
char **e;
int r;
d = fido_dev_new();
d = sym_fido_dev_new();
if (!d)
return log_oom();
r = fido_dev_open(d, path);
r = sym_fido_dev_open(d, path);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to open FIDO2 device %s: %s", path, fido_strerr(r));
"Failed to open FIDO2 device %s: %s", path, sym_fido_strerr(r));
if (!fido_dev_is_fido2(d))
if (!sym_fido_dev_is_fido2(d))
return log_error_errno(SYNTHETIC_ERRNO(ENODEV),
"Specified device %s is not a FIDO2 device.", path);
di = fido_cbor_info_new();
di = sym_fido_cbor_info_new();
if (!di)
return log_oom();
r = fido_dev_get_cbor_info(d, di);
r = sym_fido_dev_get_cbor_info(d, di);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to get CBOR device info for %s: %s", path, fido_strerr(r));
"Failed to get CBOR device info for %s: %s", path, sym_fido_strerr(r));
e = fido_cbor_info_extensions_ptr(di);
n = fido_cbor_info_extensions_len(di);
e = sym_fido_cbor_info_extensions_ptr(di);
n = sym_fido_cbor_info_extensions_len(di);
for (size_t i = 0; i < n; i++)
if (streq(e[i], "hmac-secret")) {
@ -57,49 +58,49 @@ static int fido2_use_specific_token(
return log_error_errno(SYNTHETIC_ERRNO(ENODEV),
"Specified device %s is a FIDO2 device, but does not support the required HMAC-SECRET extension.", path);
a = fido_assert_new();
a = sym_fido_assert_new();
if (!a)
return log_oom();
r = fido_assert_set_extensions(a, FIDO_EXT_HMAC_SECRET);
r = sym_fido_assert_set_extensions(a, FIDO_EXT_HMAC_SECRET);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to enable HMAC-SECRET extension on FIDO2 assertion: %s", fido_strerr(r));
"Failed to enable HMAC-SECRET extension on FIDO2 assertion: %s", sym_fido_strerr(r));
r = fido_assert_set_hmac_salt(a, salt->salt, salt->salt_size);
r = sym_fido_assert_set_hmac_salt(a, salt->salt, salt->salt_size);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set salt on FIDO2 assertion: %s", fido_strerr(r));
"Failed to set salt on FIDO2 assertion: %s", sym_fido_strerr(r));
r = fido_assert_set_rp(a, "io.systemd.home");
r = sym_fido_assert_set_rp(a, "io.systemd.home");
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 assertion ID: %s", fido_strerr(r));
"Failed to set FIDO2 assertion ID: %s", sym_fido_strerr(r));
r = fido_assert_set_clientdata_hash(a, (const unsigned char[32]) {}, 32);
r = sym_fido_assert_set_clientdata_hash(a, (const unsigned char[32]) {}, 32);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 assertion client data hash: %s", fido_strerr(r));
"Failed to set FIDO2 assertion client data hash: %s", sym_fido_strerr(r));
r = fido_assert_allow_cred(a, salt->credential.id, salt->credential.size);
r = sym_fido_assert_allow_cred(a, salt->credential.id, salt->credential.size);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to add FIDO2 assertion credential ID: %s", fido_strerr(r));
"Failed to add FIDO2 assertion credential ID: %s", sym_fido_strerr(r));
r = fido_assert_set_up(a, h->fido2_user_presence_permitted <= 0 ? FIDO_OPT_FALSE : FIDO_OPT_TRUE);
r = sym_fido_assert_set_up(a, h->fido2_user_presence_permitted <= 0 ? FIDO_OPT_FALSE : FIDO_OPT_TRUE);
if (r != FIDO_OK)
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to set FIDO2 assertion user presence: %s", fido_strerr(r));
"Failed to set FIDO2 assertion user presence: %s", sym_fido_strerr(r));
log_info("Asking FIDO2 token for authentication.");
r = fido_dev_get_assert(d, a, NULL); /* try without pin first */
r = sym_fido_dev_get_assert(d, a, NULL); /* try without pin first */
if (r == FIDO_ERR_PIN_REQUIRED) {
char **i;
/* OK, we needed a pin, try with all pins in turn */
STRV_FOREACH(i, secret->token_pin) {
r = fido_dev_get_assert(d, a, *i);
r = sym_fido_dev_get_assert(d, a, *i);
if (r != FIDO_ERR_PIN_INVALID)
break;
}
@ -128,14 +129,14 @@ static int fido2_use_specific_token(
"Token action timeout. (User didn't interact with token quickly enough.)");
default:
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to ask token for assertion: %s", fido_strerr(r));
"Failed to ask token for assertion: %s", sym_fido_strerr(r));
}
hmac = fido_assert_hmac_secret_ptr(a, 0);
hmac = sym_fido_assert_hmac_secret_ptr(a, 0);
if (!hmac)
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve HMAC secret.");
hmac_size = fido_assert_hmac_secret_len(a, 0);
hmac_size = sym_fido_assert_hmac_secret_len(a, 0);
r = base64mem(hmac, hmac_size, ret);
if (r < 0)
@ -149,18 +150,22 @@ int fido2_use_token(UserRecord *h, UserRecord *secret, const Fido2HmacSalt *salt
fido_dev_info_t *di = NULL;
int r;
di = fido_dev_info_new(allocated);
r = dlopen_libfido2();
if (r < 0)
return log_error_errno(r, "FIDO2 support is not installed.");
di = sym_fido_dev_info_new(allocated);
if (!di)
return log_oom();
r = fido_dev_info_manifest(di, allocated, &found);
r = sym_fido_dev_info_manifest(di, allocated, &found);
if (r == FIDO_ERR_INTERNAL) {
/* The library returns FIDO_ERR_INTERNAL when no devices are found. I wish it wouldn't. */
r = log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), "Got FIDO_ERR_INTERNAL, assuming no devices.");
goto finish;
}
if (r != FIDO_OK) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", fido_strerr(r));
r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", sym_fido_strerr(r));
goto finish;
}
@ -168,14 +173,14 @@ int fido2_use_token(UserRecord *h, UserRecord *secret, const Fido2HmacSalt *salt
const fido_dev_info_t *entry;
const char *path;
entry = fido_dev_info_ptr(di, i);
entry = sym_fido_dev_info_ptr(di, i);
if (!entry) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to get device information for FIDO device %zu.", i);
goto finish;
}
path = fido_dev_info_path(entry);
path = sym_fido_dev_info_path(entry);
if (!path) {
r = log_error_errno(SYNTHETIC_ERRNO(EIO),
"Failed to query FIDO device path.");
@ -192,6 +197,6 @@ int fido2_use_token(UserRecord *h, UserRecord *secret, const Fido2HmacSalt *salt
r = -EAGAIN;
finish:
fido_dev_info_free(&di, allocated);
sym_fido_dev_info_free(&di, allocated);
return r;
}

117
src/shared/libfido2-util.c Normal file
View File

@ -0,0 +1,117 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "libfido2-util.h"
#if HAVE_LIBFIDO2
#include "alloc-util.h"
#include "dlfcn-util.h"
#include "log.h"
static void *libfido2_dl = NULL;
int (*sym_fido_assert_allow_cred)(fido_assert_t *, const unsigned char *, size_t) = NULL;
void (*sym_fido_assert_free)(fido_assert_t **) = NULL;
size_t (*sym_fido_assert_hmac_secret_len)(const fido_assert_t *, size_t) = NULL;
const unsigned char* (*sym_fido_assert_hmac_secret_ptr)(const fido_assert_t *, size_t) = NULL;
fido_assert_t* (*sym_fido_assert_new)(void) = NULL;
int (*sym_fido_assert_set_clientdata_hash)(fido_assert_t *, const unsigned char *, size_t) = NULL;
int (*sym_fido_assert_set_extensions)(fido_assert_t *, int) = NULL;
int (*sym_fido_assert_set_hmac_salt)(fido_assert_t *, const unsigned char *, size_t) = NULL;
int (*sym_fido_assert_set_rp)(fido_assert_t *, const char *) = NULL;
int (*sym_fido_assert_set_up)(fido_assert_t *, fido_opt_t) = NULL;
size_t (*sym_fido_cbor_info_extensions_len)(const fido_cbor_info_t *) = NULL;
char **(*sym_fido_cbor_info_extensions_ptr)(const fido_cbor_info_t *) = NULL;
void (*sym_fido_cbor_info_free)(fido_cbor_info_t **) = NULL;
fido_cbor_info_t* (*sym_fido_cbor_info_new)(void) = NULL;
void (*sym_fido_cred_free)(fido_cred_t **) = NULL;
size_t (*sym_fido_cred_id_len)(const fido_cred_t *) = NULL;
const unsigned char* (*sym_fido_cred_id_ptr)(const fido_cred_t *) = NULL;
fido_cred_t* (*sym_fido_cred_new)(void) = NULL;
int (*sym_fido_cred_set_clientdata_hash)(fido_cred_t *, const unsigned char *, size_t) = NULL;
int (*sym_fido_cred_set_extensions)(fido_cred_t *, int) = NULL;
int (*sym_fido_cred_set_rk)(fido_cred_t *, fido_opt_t) = NULL;
int (*sym_fido_cred_set_rp)(fido_cred_t *, const char *, const char *) = NULL;
int (*sym_fido_cred_set_type)(fido_cred_t *, int) = NULL;
int (*sym_fido_cred_set_user)(fido_cred_t *, const unsigned char *, size_t, const char *, const char *, const char *) = NULL;
int (*sym_fido_cred_set_uv)(fido_cred_t *, fido_opt_t) = NULL;
void (*sym_fido_dev_free)(fido_dev_t **) = NULL;
int (*sym_fido_dev_get_assert)(fido_dev_t *, fido_assert_t *, const char *) = NULL;
int (*sym_fido_dev_get_cbor_info)(fido_dev_t *, fido_cbor_info_t *) = NULL;
void (*sym_fido_dev_info_free)(fido_dev_info_t **, size_t) = NULL;
int (*sym_fido_dev_info_manifest)(fido_dev_info_t *, size_t, size_t *) = NULL;
const char* (*sym_fido_dev_info_manufacturer_string)(const fido_dev_info_t *) = NULL;
const char* (*sym_fido_dev_info_product_string)(const fido_dev_info_t *) = NULL;
fido_dev_info_t* (*sym_fido_dev_info_new)(size_t) = NULL;
const char* (*sym_fido_dev_info_path)(const fido_dev_info_t *) = NULL;
const fido_dev_info_t* (*sym_fido_dev_info_ptr)(const fido_dev_info_t *, size_t) = NULL;
bool (*sym_fido_dev_is_fido2)(const fido_dev_t *) = NULL;
int (*sym_fido_dev_make_cred)(fido_dev_t *, fido_cred_t *, const char *) = NULL;
fido_dev_t* (*sym_fido_dev_new)(void) = NULL;
int (*sym_fido_dev_open)(fido_dev_t *, const char *) = NULL;
const char* (*sym_fido_strerr)(int) = NULL;
int dlopen_libfido2(void) {
_cleanup_(dlclosep) void *dl = NULL;
int r;
if (libfido2_dl)
return 0; /* Already loaded */
dl = dlopen("libfido2.so.1", RTLD_LAZY);
if (!dl)
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"libfido2 support is not installed: %s", dlerror());
r = dlsym_many_and_warn(
dl,
LOG_DEBUG,
DLSYM_ARG(fido_assert_allow_cred),
DLSYM_ARG(fido_assert_free),
DLSYM_ARG(fido_assert_hmac_secret_len),
DLSYM_ARG(fido_assert_hmac_secret_ptr),
DLSYM_ARG(fido_assert_new),
DLSYM_ARG(fido_assert_set_clientdata_hash),
DLSYM_ARG(fido_assert_set_extensions),
DLSYM_ARG(fido_assert_set_hmac_salt),
DLSYM_ARG(fido_assert_set_rp),
DLSYM_ARG(fido_assert_set_up),
DLSYM_ARG(fido_cbor_info_extensions_len),
DLSYM_ARG(fido_cbor_info_extensions_ptr),
DLSYM_ARG(fido_cbor_info_free),
DLSYM_ARG(fido_cbor_info_new),
DLSYM_ARG(fido_cred_free),
DLSYM_ARG(fido_cred_id_len),
DLSYM_ARG(fido_cred_id_ptr),
DLSYM_ARG(fido_cred_new),
DLSYM_ARG(fido_cred_set_clientdata_hash),
DLSYM_ARG(fido_cred_set_extensions),
DLSYM_ARG(fido_cred_set_rk),
DLSYM_ARG(fido_cred_set_rp),
DLSYM_ARG(fido_cred_set_type),
DLSYM_ARG(fido_cred_set_user),
DLSYM_ARG(fido_cred_set_uv),
DLSYM_ARG(fido_dev_free),
DLSYM_ARG(fido_dev_get_assert),
DLSYM_ARG(fido_dev_get_cbor_info),
DLSYM_ARG(fido_dev_info_free),
DLSYM_ARG(fido_dev_info_manifest),
DLSYM_ARG(fido_dev_info_manufacturer_string),
DLSYM_ARG(fido_dev_info_new),
DLSYM_ARG(fido_dev_info_path),
DLSYM_ARG(fido_dev_info_product_string),
DLSYM_ARG(fido_dev_info_ptr),
DLSYM_ARG(fido_dev_is_fido2),
DLSYM_ARG(fido_dev_make_cred),
DLSYM_ARG(fido_dev_new),
DLSYM_ARG(fido_dev_open),
DLSYM_ARG(fido_strerr),
NULL);
if (r < 0)
return r;
/* Note that we never release the reference here, because there's no real reason to, after all this
* was traditionally a regular shared library dependency which lives forever too. */
libfido2_dl = TAKE_PTR(dl);
return 1;
}
#endif

72
src/shared/libfido2-util.h Normal file
View File

@ -0,0 +1,72 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "macro.h"
#if HAVE_LIBFIDO2
#include <fido.h>
extern int (*sym_fido_assert_allow_cred)(fido_assert_t *, const unsigned char *, size_t);
extern void (*sym_fido_assert_free)(fido_assert_t **);
extern size_t (*sym_fido_assert_hmac_secret_len)(const fido_assert_t *, size_t);
extern const unsigned char* (*sym_fido_assert_hmac_secret_ptr)(const fido_assert_t *, size_t);
extern fido_assert_t* (*sym_fido_assert_new)(void);
extern int (*sym_fido_assert_set_clientdata_hash)(fido_assert_t *, const unsigned char *, size_t);
extern int (*sym_fido_assert_set_extensions)(fido_assert_t *, int);
extern int (*sym_fido_assert_set_hmac_salt)(fido_assert_t *, const unsigned char *, size_t);
extern int (*sym_fido_assert_set_rp)(fido_assert_t *, const char *);
extern int (*sym_fido_assert_set_up)(fido_assert_t *, fido_opt_t);
extern size_t (*sym_fido_cbor_info_extensions_len)(const fido_cbor_info_t *);
extern char **(*sym_fido_cbor_info_extensions_ptr)(const fido_cbor_info_t *);
extern void (*sym_fido_cbor_info_free)(fido_cbor_info_t **);
extern fido_cbor_info_t* (*sym_fido_cbor_info_new)(void);
extern void (*sym_fido_cred_free)(fido_cred_t **);
extern size_t (*sym_fido_cred_id_len)(const fido_cred_t *);
extern const unsigned char* (*sym_fido_cred_id_ptr)(const fido_cred_t *);
extern fido_cred_t* (*sym_fido_cred_new)(void);
extern int (*sym_fido_cred_set_clientdata_hash)(fido_cred_t *, const unsigned char *, size_t);
extern int (*sym_fido_cred_set_extensions)(fido_cred_t *, int);
extern int (*sym_fido_cred_set_rk)(fido_cred_t *, fido_opt_t);
extern int (*sym_fido_cred_set_rp)(fido_cred_t *, const char *, const char *);
extern int (*sym_fido_cred_set_type)(fido_cred_t *, int);
extern int (*sym_fido_cred_set_user)(fido_cred_t *, const unsigned char *, size_t, const char *, const char *, const char *);
extern int (*sym_fido_cred_set_uv)(fido_cred_t *, fido_opt_t);
extern void (*sym_fido_dev_free)(fido_dev_t **);
extern int (*sym_fido_dev_get_assert)(fido_dev_t *, fido_assert_t *, const char *);
extern int (*sym_fido_dev_get_cbor_info)(fido_dev_t *, fido_cbor_info_t *);
extern void (*sym_fido_dev_info_free)(fido_dev_info_t **, size_t);
extern int (*sym_fido_dev_info_manifest)(fido_dev_info_t *, size_t, size_t *);
extern const char* (*sym_fido_dev_info_manufacturer_string)(const fido_dev_info_t *);
extern const char* (*sym_fido_dev_info_product_string)(const fido_dev_info_t *);
extern fido_dev_info_t* (*sym_fido_dev_info_new)(size_t);
extern const char* (*sym_fido_dev_info_path)(const fido_dev_info_t *);
extern const fido_dev_info_t* (*sym_fido_dev_info_ptr)(const fido_dev_info_t *, size_t);
extern bool (*sym_fido_dev_is_fido2)(const fido_dev_t *);
extern int (*sym_fido_dev_make_cred)(fido_dev_t *, fido_cred_t *, const char *);
extern fido_dev_t* (*sym_fido_dev_new)(void);
extern int (*sym_fido_dev_open)(fido_dev_t *, const char *);
extern const char* (*sym_fido_strerr)(int);
int dlopen_libfido2(void);
static inline void fido_cbor_info_free_wrapper(fido_cbor_info_t **p) {
if (*p)
sym_fido_cbor_info_free(p);
}
static inline void fido_assert_free_wrapper(fido_assert_t **p) {
if (*p)
sym_fido_assert_free(p);
}
static inline void fido_dev_free_wrapper(fido_dev_t **p) {
if (*p)
sym_fido_dev_free(p);
}
static inline void fido_cred_free_wrapper(fido_cred_t **p) {
if (*p)
sym_fido_cred_free(p);
}
#endif

2
src/shared/meson.build
View File

@ -146,6 +146,8 @@ shared_sources = files('''
json.h
libcrypt-util.c
libcrypt-util.h
libfido2-util.c
libfido2-util.h
libmount-util.h
linux/auto_dev-ioctl.h
linux/bpf.h