shared: add pkcs11-util.[ch]
This commit is contained in:
Lennart Poettering
parent
3f63701983
commit
839fddbe50
13
meson.build
13
meson.build
|
|
@ -1104,6 +1104,18 @@ else
|
|||
endif
|
||||
conf.set10('HAVE_OPENSSL', have)
|
||||
|
||||
want_p11kit = get_option('p11kit')
|
||||
if want_p11kit != 'false' and not skip_deps
|
||||
libp11kit = dependency('p11-kit-1',
|
||||
version : '>= 0.23.3',
|
||||
required : want_p11kit == 'true')
|
||||
have = libp11kit.found()
|
||||
else
|
||||
have = false
|
||||
libp11kit = []
|
||||
endif
|
||||
conf.set10('HAVE_P11KIT', have)
|
||||
|
||||
want_elfutils = get_option('elfutils')
|
||||
if want_elfutils != 'false' and not skip_deps
|
||||
libdw = dependency('libdw',
|
||||
|
|
@ -3194,6 +3206,7 @@ missing = []
|
|||
foreach tuple : [
|
||||
['libcryptsetup'],
|
||||
['PAM'],
|
||||
['p11kit'],
|
||||
['AUDIT'],
|
||||
['IMA'],
|
||||
['AppArmor'],
|
||||
|
|
|
|||
|
|
@ -282,6 +282,8 @@ option('gnutls', type : 'combo', choices : ['auto', 'true', 'false'],
|
|||
description : 'gnutls support')
|
||||
option('openssl', type : 'combo', choices : ['auto', 'true', 'false'],
|
||||
description : 'openssl support')
|
||||
option('p11kit', type : 'combo', choices : ['auto', 'true', 'false'],
|
||||
description : 'p11kit support')
|
||||
option('elfutils', type : 'combo', choices : ['auto', 'true', 'false'],
|
||||
description : 'elfutils support')
|
||||
option('zlib', type : 'combo', choices : ['auto', 'true', 'false'],
|
||||
|
|
|
|||
|
|
@ -142,6 +142,8 @@ shared_sources = files('''
|
|||
path-lookup.c
|
||||
path-lookup.h
|
||||
pe-header.h
|
||||
pkcs11-util.c
|
||||
pkcs11-util.h
|
||||
pretty-print.c
|
||||
pretty-print.h
|
||||
ptyfwd.c
|
||||
|
|
@ -278,6 +280,8 @@ libshared_deps = [threads,
|
|||
libkmod,
|
||||
liblz4,
|
||||
libmount,
|
||||
libopenssl,
|
||||
libp11kit,
|
||||
librt,
|
||||
libseccomp,
|
||||
libselinux,
|
||||
|
|
|
|||
|
|
@ -0,0 +1,912 @@
|
|||
/* SPDX-License-Identifier: LGPL-2.1+ */
|
||||
|
||||
#include <fcntl.h>
|
||||
|
||||
#include "ask-password-api.h"
|
||||
#include "escape.h"
|
||||
#include "fd-util.h"
|
||||
#include "io-util.h"
|
||||
#include "memory-util.h"
|
||||
#if HAVE_OPENSSL
|
||||
#include "openssl-util.h"
|
||||
#endif
|
||||
#include "pkcs11-util.h"
|
||||
#include "random-util.h"
|
||||
#include "string-util.h"
|
||||
#include "strv.h"
|
||||
|
||||
bool pkcs11_uri_valid(const char *uri) {
|
||||
const char *p;
|
||||
|
||||
/* A very superficial checker for RFC7512 PKCS#11 URI syntax */
|
||||
|
||||
if (isempty(uri))
|
||||
return false;
|
||||
|
||||
p = startswith(uri, "pkcs11:");
|
||||
if (!p)
|
||||
return false;
|
||||
|
||||
if (isempty(p))
|
||||
return false;
|
||||
|
||||
if (!in_charset(p, ALPHANUMERICAL "-_?;&%="))
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
#if HAVE_P11KIT
|
||||
|
||||
int uri_from_string(const char *p, P11KitUri **ret) {
|
||||
_cleanup_(p11_kit_uri_freep) P11KitUri *uri = NULL;
|
||||
|
||||
assert(p);
|
||||
assert(ret);
|
||||
|
||||
uri = p11_kit_uri_new();
|
||||
if (!uri)
|
||||
return -ENOMEM;
|
||||
|
||||
if (p11_kit_uri_parse(p, P11_KIT_URI_FOR_ANY, uri) != P11_KIT_URI_OK)
|
||||
return -EINVAL;
|
||||
|
||||
*ret = TAKE_PTR(uri);
|
||||
return 0;
|
||||
}
|
||||
|
||||
P11KitUri *uri_from_module_info(const CK_INFO *info) {
|
||||
P11KitUri *uri;
|
||||
|
||||
assert(info);
|
||||
|
||||
uri = p11_kit_uri_new();
|
||||
if (!uri)
|
||||
return NULL;
|
||||
|
||||
*p11_kit_uri_get_module_info(uri) = *info;
|
||||
return uri;
|
||||
}
|
||||
|
||||
P11KitUri *uri_from_slot_info(const CK_SLOT_INFO *slot_info) {
|
||||
P11KitUri *uri;
|
||||
|
||||
assert(slot_info);
|
||||
|
||||
uri = p11_kit_uri_new();
|
||||
if (!uri)
|
||||
return NULL;
|
||||
|
||||
*p11_kit_uri_get_slot_info(uri) = *slot_info;
|
||||
return uri;
|
||||
}
|
||||
|
||||
P11KitUri *uri_from_token_info(const CK_TOKEN_INFO *token_info) {
|
||||
P11KitUri *uri;
|
||||
|
||||
assert(token_info);
|
||||
|
||||
uri = p11_kit_uri_new();
|
||||
if (!uri)
|
||||
return NULL;
|
||||
|
||||
*p11_kit_uri_get_token_info(uri) = *token_info;
|
||||
return uri;
|
||||
}
|
||||
|
||||
CK_RV pkcs11_get_slot_list_malloc(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SLOT_ID **ret_slotids,
|
||||
CK_ULONG *ret_n_slotids) {
|
||||
|
||||
CK_RV rv;
|
||||
|
||||
assert(m);
|
||||
assert(ret_slotids);
|
||||
assert(ret_n_slotids);
|
||||
|
||||
for (unsigned tries = 0; tries < 16; tries++) {
|
||||
_cleanup_free_ CK_SLOT_ID *slotids = NULL;
|
||||
CK_ULONG n_slotids = 0;
|
||||
|
||||
rv = m->C_GetSlotList(0, NULL, &n_slotids);
|
||||
if (rv != CKR_OK)
|
||||
return rv;
|
||||
if (n_slotids == 0) {
|
||||
*ret_slotids = NULL;
|
||||
*ret_n_slotids = 0;
|
||||
return CKR_OK;
|
||||
}
|
||||
|
||||
slotids = new(CK_SLOT_ID, n_slotids);
|
||||
if (!slotids)
|
||||
return CKR_HOST_MEMORY;
|
||||
|
||||
rv = m->C_GetSlotList(0, slotids, &n_slotids);
|
||||
if (rv == CKR_OK) {
|
||||
*ret_slotids = TAKE_PTR(slotids);
|
||||
*ret_n_slotids = n_slotids;
|
||||
return CKR_OK;
|
||||
}
|
||||
|
||||
if (rv != CKR_BUFFER_TOO_SMALL)
|
||||
return rv;
|
||||
|
||||
/* Hu? Maybe somebody plugged something in and things changed? Let's try again */
|
||||
}
|
||||
|
||||
return CKR_BUFFER_TOO_SMALL;
|
||||
}
|
||||
|
||||
char *pkcs11_token_label(const CK_TOKEN_INFO *token_info) {
|
||||
char *t;
|
||||
|
||||
/* The label is not NUL terminated and likely padded with spaces, let's make a copy here, so that we
|
||||
* can strip that. */
|
||||
t = strndup((char*) token_info->label, sizeof(token_info->label));
|
||||
if (!t)
|
||||
return NULL;
|
||||
|
||||
strstrip(t);
|
||||
return t;
|
||||
}
|
||||
|
||||
int pkcs11_token_login(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session,
|
||||
CK_SLOT_ID slotid,
|
||||
const CK_TOKEN_INFO *token_info,
|
||||
const char *friendly_name,
|
||||
const char *icon_name,
|
||||
const char *keyname,
|
||||
usec_t until,
|
||||
char **ret_used_pin) {
|
||||
|
||||
_cleanup_free_ char *token_uri_string = NULL, *token_uri_escaped = NULL, *id = NULL, *token_label = NULL;
|
||||
_cleanup_(p11_kit_uri_freep) P11KitUri *token_uri = NULL;
|
||||
CK_TOKEN_INFO updated_token_info;
|
||||
int uri_result;
|
||||
CK_RV rv;
|
||||
int r;
|
||||
|
||||
assert(m);
|
||||
assert(token_info);
|
||||
|
||||
token_label = pkcs11_token_label(token_info);
|
||||
if (!token_label)
|
||||
return log_oom();
|
||||
|
||||
token_uri = uri_from_token_info(token_info);
|
||||
if (!token_uri)
|
||||
return log_oom();
|
||||
|
||||
uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string);
|
||||
if (uri_result != P11_KIT_URI_OK)
|
||||
return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", p11_kit_uri_message(uri_result));
|
||||
|
||||
if (FLAGS_SET(token_info->flags, CKF_PROTECTED_AUTHENTICATION_PATH)) {
|
||||
rv = m->C_Login(session, CKU_USER, NULL, 0);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to log into security token '%s': %s", token_label, p11_kit_strerror(rv));
|
||||
|
||||
log_info("Successully logged into security token '%s' via protected authentication path.", token_label);
|
||||
*ret_used_pin = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (!FLAGS_SET(token_info->flags, CKF_LOGIN_REQUIRED)) {
|
||||
log_info("No login into security token '%s' required.", token_label);
|
||||
*ret_used_pin = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
token_uri_escaped = cescape(token_uri_string);
|
||||
if (!token_uri_escaped)
|
||||
return log_oom();
|
||||
|
||||
id = strjoin("pkcs11:", token_uri_escaped);
|
||||
if (!id)
|
||||
return log_oom();
|
||||
|
||||
for (unsigned tries = 0; tries < 3; tries++) {
|
||||
_cleanup_strv_free_erase_ char **passwords = NULL;
|
||||
_cleanup_free_ char *text = NULL;
|
||||
char **i, *e;
|
||||
|
||||
if (FLAGS_SET(token_info->flags, CKF_USER_PIN_FINAL_TRY))
|
||||
r = asprintf(&text,
|
||||
"Please enter correct PIN for security token '%s' in order to unlock %s (final try):",
|
||||
token_label, friendly_name);
|
||||
if (FLAGS_SET(token_info->flags, CKF_USER_PIN_COUNT_LOW))
|
||||
r = asprintf(&text,
|
||||
"PIN has been entered incorrectly previously, please enter correct PIN for security token '%s' in order to unlock %s:",
|
||||
token_label, friendly_name);
|
||||
else if (tries == 0)
|
||||
r = asprintf(&text,
|
||||
"Please enter PIN for security token '%s' in order to unlock %s:",
|
||||
token_label, friendly_name);
|
||||
else
|
||||
r = asprintf(&text,
|
||||
"Please enter PIN for security token '%s' in order to unlock %s (try #%u):",
|
||||
token_label, friendly_name, tries+1);
|
||||
if (r < 0)
|
||||
return log_oom();
|
||||
|
||||
e = getenv("PIN");
|
||||
if (e) {
|
||||
passwords = strv_new(e);
|
||||
if (!passwords)
|
||||
return log_oom();
|
||||
|
||||
string_erase(e);
|
||||
if (unsetenv("PIN") < 0)
|
||||
return log_error_errno(errno, "Failed to unset $PIN: %m");
|
||||
} else {
|
||||
/* We never cache PINs, simply because it's fatal if we use wrong PINs, since usually there are only 3 tries */
|
||||
r = ask_password_auto(text, icon_name, id, keyname, until, 0, &passwords);
|
||||
if (r < 0)
|
||||
return log_error_errno(r, "Failed to query PIN for security token '%s': %m", token_label);
|
||||
}
|
||||
|
||||
STRV_FOREACH(i, passwords) {
|
||||
rv = m->C_Login(session, CKU_USER, (CK_UTF8CHAR*) *i, strlen(*i));
|
||||
if (rv == CKR_OK) {
|
||||
|
||||
if (ret_used_pin) {
|
||||
char *c;
|
||||
|
||||
c = strdup(*i);
|
||||
if (!c)
|
||||
return log_oom();
|
||||
|
||||
*ret_used_pin = c;
|
||||
}
|
||||
|
||||
log_info("Successfully logged into security token '%s'.", token_label);
|
||||
return 0;
|
||||
}
|
||||
if (rv == CKR_PIN_LOCKED)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EPERM),
|
||||
"PIN has been locked, please reset PIN of security token '%s'.", token_label);
|
||||
if (!IN_SET(rv, CKR_PIN_INCORRECT, CKR_PIN_LEN_RANGE))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to log into security token '%s': %s", token_label, p11_kit_strerror(rv));
|
||||
|
||||
/* Referesh the token info, so that we can prompt knowing the new flags if they changed. */
|
||||
rv = m->C_GetTokenInfo(slotid, &updated_token_info);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to acquire updated security token information for slot %lu: %s",
|
||||
slotid, p11_kit_strerror(rv));
|
||||
|
||||
token_info = &updated_token_info;
|
||||
log_notice("PIN for token '%s' is incorrect, please try again.", token_label);
|
||||
}
|
||||
}
|
||||
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to log into token '%s'.", token_label);
|
||||
}
|
||||
|
||||
int pkcs11_token_find_x509_certificate(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session,
|
||||
P11KitUri *search_uri,
|
||||
CK_OBJECT_HANDLE *ret_object) {
|
||||
|
||||
bool found_class = false, found_certificate_type = false;
|
||||
_cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL;
|
||||
CK_ULONG n_attributes, a, n_objects;
|
||||
CK_ATTRIBUTE *attributes = NULL;
|
||||
CK_OBJECT_HANDLE objects[2];
|
||||
CK_RV rv, rv2;
|
||||
|
||||
assert(m);
|
||||
assert(search_uri);
|
||||
assert(ret_object);
|
||||
|
||||
attributes = p11_kit_uri_get_attributes(search_uri, &n_attributes);
|
||||
for (a = 0; a < n_attributes; a++) {
|
||||
|
||||
/* We use the URI's included match attributes, but make them more strict. This allows users
|
||||
* to specify a token URL instead of an object URL and the right thing should happen if
|
||||
* there's only one suitable key on the token. */
|
||||
|
||||
switch (attributes[a].type) {
|
||||
|
||||
case CKA_CLASS: {
|
||||
CK_OBJECT_CLASS c;
|
||||
|
||||
if (attributes[a].ulValueLen != sizeof(c))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size.");
|
||||
|
||||
memcpy(&c, attributes[a].pValue, sizeof(c));
|
||||
if (c != CKO_CERTIFICATE)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing.");
|
||||
|
||||
found_class = true;
|
||||
break;
|
||||
}
|
||||
|
||||
case CKA_CERTIFICATE_TYPE: {
|
||||
CK_CERTIFICATE_TYPE t;
|
||||
|
||||
if (attributes[a].ulValueLen != sizeof(t))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CERTIFICATE_TYPE attribute size.");
|
||||
|
||||
memcpy(&t, attributes[a].pValue, sizeof(t));
|
||||
if (t != CKC_X_509)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing.");
|
||||
|
||||
found_certificate_type = true;
|
||||
break;
|
||||
}}
|
||||
}
|
||||
|
||||
if (!found_class || !found_certificate_type) {
|
||||
/* Hmm, let's slightly extend the attribute list we search for */
|
||||
|
||||
attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_class + !found_certificate_type);
|
||||
if (!attributes_buffer)
|
||||
return log_oom();
|
||||
|
||||
memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes);
|
||||
|
||||
if (!found_class) {
|
||||
static const CK_OBJECT_CLASS class = CKO_CERTIFICATE;
|
||||
|
||||
attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
|
||||
.type = CKA_CLASS,
|
||||
.pValue = (CK_OBJECT_CLASS*) &class,
|
||||
.ulValueLen = sizeof(class),
|
||||
};
|
||||
}
|
||||
|
||||
if (!found_certificate_type) {
|
||||
static const CK_CERTIFICATE_TYPE type = CKC_X_509;
|
||||
|
||||
attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
|
||||
.type = CKA_CERTIFICATE_TYPE,
|
||||
.pValue = (CK_CERTIFICATE_TYPE*) &type,
|
||||
.ulValueLen = sizeof(type),
|
||||
};
|
||||
}
|
||||
|
||||
attributes = attributes_buffer;
|
||||
}
|
||||
|
||||
rv = m->C_FindObjectsInit(session, attributes, n_attributes);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to initialize object find call: %s", p11_kit_strerror(rv));
|
||||
|
||||
rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects);
|
||||
rv2 = m->C_FindObjectsFinal(session);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to find objects: %s", p11_kit_strerror(rv));
|
||||
if (rv2 != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to finalize object find call: %s", p11_kit_strerror(rv));
|
||||
if (n_objects == 0)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(ENOENT),
|
||||
"Failed to find selected X509 certificate on token.");
|
||||
if (n_objects > 1)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
|
||||
"Configured URI matches multiple certificates, refusing.");
|
||||
|
||||
*ret_object = objects[0];
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if HAVE_OPENSSL
|
||||
int pkcs11_token_read_x509_certificate(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session,
|
||||
CK_OBJECT_HANDLE object,
|
||||
X509 **ret_cert) {
|
||||
|
||||
_cleanup_free_ void *buffer = NULL;
|
||||
_cleanup_free_ char *t = NULL;
|
||||
CK_ATTRIBUTE attribute = {
|
||||
.type = CKA_VALUE
|
||||
};
|
||||
CK_RV rv;
|
||||
_cleanup_(X509_freep) X509 *x509 = NULL;
|
||||
X509_NAME *name = NULL;
|
||||
const unsigned char *p;
|
||||
|
||||
rv = m->C_GetAttributeValue(session, object, &attribute, 1);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to read X.509 certificate size off token: %s", p11_kit_strerror(rv));
|
||||
|
||||
buffer = malloc(attribute.ulValueLen);
|
||||
if (!buffer)
|
||||
return log_oom();
|
||||
|
||||
attribute.pValue = buffer;
|
||||
|
||||
rv = m->C_GetAttributeValue(session, object, &attribute, 1);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to read X.509 certificate data off token: %s", p11_kit_strerror(rv));
|
||||
|
||||
p = attribute.pValue;
|
||||
x509 = d2i_X509(NULL, &p, attribute.ulValueLen);
|
||||
if (!x509)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed parse X.509 certificate.");
|
||||
|
||||
name = X509_get_subject_name(x509);
|
||||
if (!name)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to acquire X.509 subject name.");
|
||||
|
||||
t = X509_NAME_oneline(name, NULL, 0);
|
||||
if (!t)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to format X.509 subject name as string.");
|
||||
|
||||
log_debug("Using X.509 certificate issued for '%s'.", t);
|
||||
|
||||
*ret_cert = TAKE_PTR(x509);
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
int pkcs11_token_find_private_key(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session,
|
||||
P11KitUri *search_uri,
|
||||
CK_OBJECT_HANDLE *ret_object) {
|
||||
|
||||
bool found_decrypt = false, found_class = false, found_key_type = false;
|
||||
_cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL;
|
||||
CK_ULONG n_attributes, a, n_objects;
|
||||
CK_ATTRIBUTE *attributes = NULL;
|
||||
CK_OBJECT_HANDLE objects[2];
|
||||
CK_RV rv, rv2;
|
||||
|
||||
assert(m);
|
||||
assert(search_uri);
|
||||
assert(ret_object);
|
||||
|
||||
attributes = p11_kit_uri_get_attributes(search_uri, &n_attributes);
|
||||
for (a = 0; a < n_attributes; a++) {
|
||||
|
||||
/* We use the URI's included match attributes, but make them more strict. This allows users
|
||||
* to specify a token URL instead of an object URL and the right thing should happen if
|
||||
* there's only one suitable key on the token. */
|
||||
|
||||
switch (attributes[a].type) {
|
||||
|
||||
case CKA_CLASS: {
|
||||
CK_OBJECT_CLASS c;
|
||||
|
||||
if (attributes[a].ulValueLen != sizeof(c))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size.");
|
||||
|
||||
memcpy(&c, attributes[a].pValue, sizeof(c));
|
||||
if (c != CKO_PRIVATE_KEY)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
||||
"Selected PKCS#11 object is not a private key, refusing.");
|
||||
|
||||
found_class = true;
|
||||
break;
|
||||
}
|
||||
|
||||
case CKA_DECRYPT: {
|
||||
CK_BBOOL b;
|
||||
|
||||
if (attributes[a].ulValueLen != sizeof(b))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_DECRYPT attribute size.");
|
||||
|
||||
memcpy(&b, attributes[a].pValue, sizeof(b));
|
||||
if (!b)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
||||
"Selected PKCS#11 object is not suitable for decryption, refusing.");
|
||||
|
||||
found_decrypt = true;
|
||||
break;
|
||||
}
|
||||
|
||||
case CKA_KEY_TYPE: {
|
||||
CK_KEY_TYPE t;
|
||||
|
||||
if (attributes[a].ulValueLen != sizeof(t))
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_KEY_TYPE attribute size.");
|
||||
|
||||
memcpy(&t, attributes[a].pValue, sizeof(t));
|
||||
if (t != CKK_RSA)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an RSA key, refusing.");
|
||||
|
||||
found_key_type = true;
|
||||
break;
|
||||
}}
|
||||
}
|
||||
|
||||
if (!found_decrypt || !found_class || !found_key_type) {
|
||||
/* Hmm, let's slightly extend the attribute list we search for */
|
||||
|
||||
attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_decrypt + !found_class + !found_key_type);
|
||||
if (!attributes_buffer)
|
||||
return log_oom();
|
||||
|
||||
memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes);
|
||||
|
||||
if (!found_decrypt) {
|
||||
static const CK_BBOOL yes = true;
|
||||
|
||||
attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
|
||||
.type = CKA_DECRYPT,
|
||||
.pValue = (CK_BBOOL*) &yes,
|
||||
.ulValueLen = sizeof(yes),
|
||||
};
|
||||
}
|
||||
|
||||
if (!found_class) {
|
||||
static const CK_OBJECT_CLASS class = CKO_PRIVATE_KEY;
|
||||
|
||||
attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
|
||||
.type = CKA_CLASS,
|
||||
.pValue = (CK_OBJECT_CLASS*) &class,
|
||||
.ulValueLen = sizeof(class),
|
||||
};
|
||||
}
|
||||
|
||||
if (!found_key_type) {
|
||||
static const CK_KEY_TYPE type = CKK_RSA;
|
||||
|
||||
attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) {
|
||||
.type = CKA_KEY_TYPE,
|
||||
.pValue = (CK_KEY_TYPE*) &type,
|
||||
.ulValueLen = sizeof(type),
|
||||
};
|
||||
}
|
||||
|
||||
attributes = attributes_buffer;
|
||||
}
|
||||
|
||||
rv = m->C_FindObjectsInit(session, attributes, n_attributes);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to initialize object find call: %s", p11_kit_strerror(rv));
|
||||
|
||||
rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects);
|
||||
rv2 = m->C_FindObjectsFinal(session);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to find objects: %s", p11_kit_strerror(rv));
|
||||
if (rv2 != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to finalize object find call: %s", p11_kit_strerror(rv));
|
||||
if (n_objects == 0)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(ENOENT),
|
||||
"Failed to find selected private key suitable for decryption on token.");
|
||||
if (n_objects > 1)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ),
|
||||
"Configured private key URI matches multiple keys, refusing.");
|
||||
|
||||
*ret_object = objects[0];
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pkcs11_token_decrypt_data(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session,
|
||||
CK_OBJECT_HANDLE object,
|
||||
const void *encrypted_data,
|
||||
size_t encrypted_data_size,
|
||||
void **ret_decrypted_data,
|
||||
size_t *ret_decrypted_data_size) {
|
||||
|
||||
static const CK_MECHANISM mechanism = {
|
||||
.mechanism = CKM_RSA_PKCS
|
||||
};
|
||||
_cleanup_(erase_and_freep) CK_BYTE *dbuffer = NULL;
|
||||
CK_ULONG dbuffer_size = 0;
|
||||
CK_RV rv;
|
||||
|
||||
assert(m);
|
||||
assert(encrypted_data);
|
||||
assert(encrypted_data_size > 0);
|
||||
assert(ret_decrypted_data);
|
||||
assert(ret_decrypted_data_size);
|
||||
|
||||
rv = m->C_DecryptInit(session, (CK_MECHANISM*) &mechanism, object);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to initialize decryption on security token: %s", p11_kit_strerror(rv));
|
||||
|
||||
dbuffer_size = encrypted_data_size; /* Start with something reasonable */
|
||||
dbuffer = malloc(dbuffer_size);
|
||||
if (!dbuffer)
|
||||
return log_oom();
|
||||
|
||||
rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size);
|
||||
if (rv == CKR_BUFFER_TOO_SMALL) {
|
||||
erase_and_free(dbuffer);
|
||||
|
||||
dbuffer = malloc(dbuffer_size);
|
||||
if (!dbuffer)
|
||||
return log_oom();
|
||||
|
||||
rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size);
|
||||
}
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to decrypt key on security token: %s", p11_kit_strerror(rv));
|
||||
|
||||
log_info("Successfully decrypted key with security token.");
|
||||
|
||||
*ret_decrypted_data = TAKE_PTR(dbuffer);
|
||||
*ret_decrypted_data_size = dbuffer_size;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pkcs11_token_acquire_rng(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SESSION_HANDLE session) {
|
||||
|
||||
_cleanup_free_ void *buffer = NULL;
|
||||
_cleanup_close_ int fd = -1;
|
||||
size_t rps;
|
||||
CK_RV rv;
|
||||
int r;
|
||||
|
||||
assert(m);
|
||||
|
||||
/* While we are at it, let's read some RNG data from the PKCS#11 token and pass it to the kernel
|
||||
* random pool. This should be cheap if we are talking to the device already. Note that we don't
|
||||
* credit any entropy, since we don't know about the quality of the pkcs#11 token's RNG. Why bother
|
||||
* at all? There are two sides to the argument whether to generate private keys on tokens or on the
|
||||
* host. By crediting some data from the token RNG to the host's pool we at least can say that any
|
||||
* key generated from it is at least as good as both sources individually. */
|
||||
|
||||
rps = random_pool_size();
|
||||
|
||||
buffer = malloc(rps);
|
||||
if (!buffer)
|
||||
return log_oom();
|
||||
|
||||
rv = m->C_GenerateRandom(session, buffer, rps);
|
||||
if (rv != CKR_OK)
|
||||
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
|
||||
"Failed to generate RNG data on security token: %s", p11_kit_strerror(rv));
|
||||
|
||||
fd = open("/dev/urandom", O_WRONLY|O_CLOEXEC|O_NOCTTY);
|
||||
if (fd < 0)
|
||||
return log_debug_errno(errno, "Failed to open /dev/urandom for writing: %m");
|
||||
|
||||
r = loop_write(fd, buffer, rps, false);
|
||||
if (r < 0)
|
||||
return log_debug_errno(r, "Failed to write PKCS#11 acquired random data to /dev/urandom: %m");
|
||||
|
||||
log_debug("Successfully written %zu bytes random data acquired via PKCS#11 to kernel random pool.", rps);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int token_process(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SLOT_ID slotid,
|
||||
const CK_SLOT_INFO *slot_info,
|
||||
const CK_TOKEN_INFO *token_info,
|
||||
P11KitUri *search_uri,
|
||||
pkcs11_find_token_callback_t callback,
|
||||
void *userdata) {
|
||||
|
||||
_cleanup_free_ char *token_label = NULL;
|
||||
CK_SESSION_HANDLE session;
|
||||
CK_RV rv;
|
||||
int r;
|
||||
|
||||
assert(m);
|
||||
assert(slot_info);
|
||||
assert(token_info);
|
||||
assert(search_uri);
|
||||
|
||||
token_label = pkcs11_token_label(token_info);
|
||||
if (!token_label)
|
||||
return log_oom();
|
||||
|
||||
rv = m->C_OpenSession(slotid, CKF_SERIAL_SESSION, NULL, NULL, &session);
|
||||
if (rv != CKR_OK)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
||||
"Failed to create session for security token '%s': %s", token_label, p11_kit_strerror(rv));
|
||||
|
||||
if (callback)
|
||||
r = callback(m, session, slotid, slot_info, token_info, search_uri, userdata);
|
||||
else
|
||||
r = 1; /* if not callback was specified, just say we found what we were looking for */
|
||||
|
||||
rv = m->C_CloseSession(session);
|
||||
if (rv != CKR_OK)
|
||||
log_warning("Failed to close session on PKCS#11 token, ignoring: %s", p11_kit_strerror(rv));
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int slot_process(
|
||||
CK_FUNCTION_LIST *m,
|
||||
CK_SLOT_ID slotid,
|
||||
P11KitUri *search_uri,
|
||||
pkcs11_find_token_callback_t callback,
|
||||
void *userdata) {
|
||||
|
||||
_cleanup_(p11_kit_uri_freep) P11KitUri* slot_uri = NULL, *token_uri = NULL;
|
||||
_cleanup_free_ char *token_uri_string = NULL;
|
||||
CK_TOKEN_INFO token_info;
|
||||
CK_SLOT_INFO slot_info;
|
||||
int uri_result;
|
||||
CK_RV rv;
|
||||
|
||||
assert(m);
|
||||
assert(search_uri);
|
||||
|
||||
/* We return -EAGAIN for all failures we can attribute to a specific slot in some way, so that the
|
||||
* caller might try other slots before giving up. */
|
||||
|
||||
rv = m->C_GetSlotInfo(slotid, &slot_info);
|
||||
if (rv != CKR_OK) {
|
||||
log_warning("Failed to acquire slot info for slot %lu, ignoring slot: %s", slotid, p11_kit_strerror(rv));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
slot_uri = uri_from_slot_info(&slot_info);
|
||||
if (!slot_uri)
|
||||
return log_oom();
|
||||
|
||||
if (DEBUG_LOGGING) {
|
||||
_cleanup_free_ char *slot_uri_string = NULL;
|
||||
|
||||
uri_result = p11_kit_uri_format(slot_uri, P11_KIT_URI_FOR_ANY, &slot_uri_string);
|
||||
if (uri_result != P11_KIT_URI_OK) {
|
||||
log_warning("Failed to format slot URI, ignoring slot: %s", p11_kit_uri_message(uri_result));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
log_debug("Found slot with URI %s", slot_uri_string);
|
||||
}
|
||||
|
||||
rv = m->C_GetTokenInfo(slotid, &token_info);
|
||||
if (rv == CKR_TOKEN_NOT_PRESENT) {
|
||||
log_debug("Token not present in slot, ignoring.");
|
||||
return -EAGAIN;
|
||||
} else if (rv != CKR_OK) {
|
||||
log_warning("Failed to acquire token info for slot %lu, ignoring slot: %s", slotid, p11_kit_strerror(rv));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
token_uri = uri_from_token_info(&token_info);
|
||||
if (!token_uri)
|
||||
return log_oom();
|
||||
|
||||
uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string);
|
||||
if (uri_result != P11_KIT_URI_OK) {
|
||||
log_warning("Failed to format slot URI: %s", p11_kit_uri_message(uri_result));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
if (!p11_kit_uri_match_token_info(search_uri, &token_info)) {
|
||||
log_debug("Found non-matching token with URI %s.", token_uri_string);
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
log_debug("Found matching token with URI %s.", token_uri_string);
|
||||
|
||||
return token_process(
|
||||
m,
|
||||
slotid,
|
||||
&slot_info,
|
||||
&token_info,
|
||||
search_uri,
|
||||
callback,
|
||||
userdata);
|
||||
}
|
||||
|
||||
static int module_process(
|
||||
CK_FUNCTION_LIST *m,
|
||||
P11KitUri *search_uri,
|
||||
pkcs11_find_token_callback_t callback,
|
||||
void *userdata) {
|
||||
|
||||
_cleanup_free_ char *name = NULL, *module_uri_string = NULL;
|
||||
_cleanup_(p11_kit_uri_freep) P11KitUri* module_uri = NULL;
|
||||
_cleanup_free_ CK_SLOT_ID *slotids = NULL;
|
||||
CK_ULONG n_slotids = 0;
|
||||
int uri_result;
|
||||
CK_INFO info;
|
||||
size_t k;
|
||||
CK_RV rv;
|
||||
int r;
|
||||
|
||||
assert(m);
|
||||
assert(search_uri);
|
||||
|
||||
/* We ignore most errors from modules here, in order to skip over faulty modules: one faulty module
|
||||
* should not have the effect that we don't try the others anymore. We indicate such per-module
|
||||
* failures with -EAGAIN, which let's the caller try the next module. */
|
||||
|
||||
name = p11_kit_module_get_name(m);
|
||||
if (!name)
|
||||
return log_oom();
|
||||
|
||||
log_debug("Trying PKCS#11 module %s.", name);
|
||||
|
||||
rv = m->C_GetInfo(&info);
|
||||
if (rv != CKR_OK) {
|
||||
log_warning("Failed to get info on PKCS#11 module, ignoring module: %s", p11_kit_strerror(rv));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
module_uri = uri_from_module_info(&info);
|
||||
if (!module_uri)
|
||||
return log_oom();
|
||||
|
||||
uri_result = p11_kit_uri_format(module_uri, P11_KIT_URI_FOR_ANY, &module_uri_string);
|
||||
if (uri_result != P11_KIT_URI_OK) {
|
||||
log_warning("Failed to format module URI, ignoring module: %s", p11_kit_uri_message(uri_result));
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
log_debug("Found module with URI %s", module_uri_string);
|
||||
|
||||
rv = pkcs11_get_slot_list_malloc(m, &slotids, &n_slotids);
|
||||
if (rv != CKR_OK) {
|
||||
log_warning("Failed to get slot list, ignoring module: %s", p11_kit_strerror(rv));
|
||||
return -EAGAIN;
|
||||
}
|
||||
if (n_slotids == 0) {
|
||||
log_debug("This module has no slots? Ignoring module.");
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
for (k = 0; k < n_slotids; k++) {
|
||||
r = slot_process(
|
||||
m,
|
||||
slotids[k],
|
||||
search_uri,
|
||||
callback,
|
||||
userdata);
|
||||
if (r != -EAGAIN)
|
||||
return r;
|
||||
}
|
||||
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
int pkcs11_find_token(
|
||||
const char *pkcs11_uri,
|
||||
pkcs11_find_token_callback_t callback,
|
||||
void *userdata) {
|
||||
|
||||
_cleanup_(p11_kit_modules_finalize_and_releasep) CK_FUNCTION_LIST **modules = NULL;
|
||||
_cleanup_(p11_kit_uri_freep) P11KitUri *search_uri = NULL;
|
||||
int r;
|
||||
|
||||
assert(pkcs11_uri);
|
||||
|
||||
/* Execute the specified callback for each matching token found. If nothing is found returns
|
||||
* -EAGAIN. Logs about all errors, except for EAGAIN, which the caller has to log about. */
|
||||
|
||||
r = uri_from_string(pkcs11_uri, &search_uri);
|
||||
if (r < 0)
|
||||
return log_error_errno(r, "Failed to parse PKCS#11 URI '%s': %m", pkcs11_uri);
|
||||
|
||||
modules = p11_kit_modules_load_and_initialize(0);
|
||||
if (!modules)
|
||||
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to initialize pkcs11 modules");
|
||||
|
||||
for (CK_FUNCTION_LIST **i = modules; *i; i++) {
|
||||
r = module_process(
|
||||
*i,
|
||||
search_uri,
|
||||
callback,
|
||||
userdata);
|
||||
if (r != -EAGAIN)
|
||||
return r;
|
||||
}
|
||||
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
/* SPDX-License-Identifier: LGPL-2.1+ */
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
|
||||
#if HAVE_P11KIT
|
||||
#include <p11-kit/p11-kit.h>
|
||||
#include <p11-kit/uri.h>
|
||||
|
||||
#if HAVE_OPENSSL
|
||||
#include <openssl/pem.h>
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#include "macro.h"
|
||||
#include "time-util.h"
|
||||
|
||||
bool pkcs11_uri_valid(const char *uri);
|
||||
|
||||
#if HAVE_P11KIT
|
||||
int uri_from_string(const char *p, P11KitUri **ret);
|
||||
|
||||
P11KitUri *uri_from_module_info(const CK_INFO *info);
|
||||
P11KitUri *uri_from_slot_info(const CK_SLOT_INFO *slot_info);
|
||||
P11KitUri *uri_from_token_info(const CK_TOKEN_INFO *token_info);
|
||||
|
||||
DEFINE_TRIVIAL_CLEANUP_FUNC(P11KitUri*, p11_kit_uri_free);
|
||||
DEFINE_TRIVIAL_CLEANUP_FUNC(CK_FUNCTION_LIST**, p11_kit_modules_finalize_and_release);
|
||||
|
||||
CK_RV pkcs11_get_slot_list_malloc(CK_FUNCTION_LIST *m, CK_SLOT_ID **ret_slotids, CK_ULONG *ret_n_slotids);
|
||||
|
||||
char *pkcs11_token_label(const CK_TOKEN_INFO *token_info);
|
||||
|
||||
int pkcs11_token_login(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, CK_SLOT_ID slotid, const CK_TOKEN_INFO *token_info, const char *friendly_name, const char *icon_name, const char *keyname, usec_t until, char **ret_used_pin);
|
||||
|
||||
int pkcs11_token_find_x509_certificate(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, P11KitUri *search_uri, CK_OBJECT_HANDLE *ret_object);
|
||||
#if HAVE_OPENSSL
|
||||
int pkcs11_token_read_x509_certificate(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, CK_OBJECT_HANDLE object, X509 **ret_cert);
|
||||
#endif
|
||||
|
||||
int pkcs11_token_find_private_key(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, P11KitUri *search_uri, CK_OBJECT_HANDLE *ret_object);
|
||||
int pkcs11_token_decrypt_data(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, CK_OBJECT_HANDLE object, const void *encrypted_data, size_t encrypted_data_size, void **ret_decrypted_data, size_t *ret_decrypted_data_size);
|
||||
|
||||
int pkcs11_token_acquire_rng(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session);
|
||||
|
||||
typedef int (*pkcs11_find_token_callback_t)(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, CK_SLOT_ID slotid, const CK_SLOT_INFO *slot_info, const CK_TOKEN_INFO *token_info, P11KitUri *uri, void *userdata);
|
||||
int pkcs11_find_token(const char *pkcs11_uri, pkcs11_find_token_callback_t callback, void *userdata);
|
||||
#endif
|
||||
Loading…
Reference in New Issue