p11kit: switch to dlopen()

[thirdparty/systemd.git] / src / shared / pkcs11-util.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <stdbool.h>

#if HAVE_P11KIT
#  include <p11-kit/p11-kit.h>
#  include <p11-kit/uri.h>
#endif

#include "macro.h"
#include "openssl-util.h"
#include "time-util.h"

bool pkcs11_uri_valid(const char *uri);

#if HAVE_P11KIT

extern char *(*sym_p11_kit_module_get_name)(CK_FUNCTION_LIST *module);
extern void (*sym_p11_kit_modules_finalize_and_release)(CK_FUNCTION_LIST **modules);
extern CK_FUNCTION_LIST **(*sym_p11_kit_modules_load_and_initialize)(int flags);
extern const char *(*sym_p11_kit_strerror)(CK_RV rv);
extern int (*sym_p11_kit_uri_format)(P11KitUri *uri, P11KitUriType uri_type, char **string);
extern void (*sym_p11_kit_uri_free)(P11KitUri *uri);
extern CK_ATTRIBUTE_PTR (*sym_p11_kit_uri_get_attributes)(P11KitUri *uri, CK_ULONG *n_attrs);
extern CK_INFO_PTR (*sym_p11_kit_uri_get_module_info)(P11KitUri *uri);
extern CK_SLOT_INFO_PTR (*sym_p11_kit_uri_get_slot_info)(P11KitUri *uri);
extern CK_TOKEN_INFO_PTR (*sym_p11_kit_uri_get_token_info)(P11KitUri *uri);
extern int (*sym_p11_kit_uri_match_token_info)(const P11KitUri *uri, const CK_TOKEN_INFO *token_info);
extern const char *(*sym_p11_kit_uri_message)(int code);
extern P11KitUri *(*sym_p11_kit_uri_new)(void);
extern int (*sym_p11_kit_uri_parse)(const char *string, P11KitUriType uri_type, P11KitUri *uri);

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_FULL(P11KitUri*, sym_p11_kit_uri_free, NULL);
DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(CK_FUNCTION_LIST**, sym_p11_kit_modules_finalize_and_release, NULL);

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);
char *pkcs11_token_manufacturer_id(const CK_TOKEN_INFO *token_info);
char *pkcs11_token_model(const CK_TOKEN_INFO *token_info);

int pkcs11_token_login_by_pin(CK_FUNCTION_LIST *m, CK_SESSION_HANDLE session, const CK_TOKEN_INFO *token_info, const char *token_label, const void *pin, size_t pin_size);
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 *key_name, const char *credential_name, usec_t until, bool headless, 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);

#if HAVE_OPENSSL
int pkcs11_acquire_certificate(const char *uri, const char *askpw_friendly_name, const char *askpw_icon_name, X509 **ret_cert, char **ret_pin_used);
#endif

typedef struct {
        const char *friendly_name;
        usec_t until;
        void *encrypted_key;
        size_t encrypted_key_size;
        void *decrypted_key;
        size_t decrypted_key_size;
        bool free_encrypted_key;
        bool headless;
} pkcs11_crypt_device_callback_data;

void pkcs11_crypt_device_callback_data_release(pkcs11_crypt_device_callback_data *data);

int pkcs11_crypt_device_callback(
                CK_FUNCTION_LIST *m,
                CK_SESSION_HANDLE session,
                CK_SLOT_ID slot_id,
                const CK_SLOT_INFO *slot_info,
                const CK_TOKEN_INFO *token_info,
                P11KitUri *uri,
                void *userdata);

int dlopen_p11kit(void);

#else

static inline int dlopen_p11kit(void) {
        return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "p11kit support is not compiled in.");
}

#endif

typedef struct {
        const char *friendly_name;
        usec_t until;
        bool headless;
} systemd_pkcs11_plugin_params;

int pkcs11_list_tokens(void);
int pkcs11_find_token_auto(char **ret);