112 lines
5.4 KiB
C
112 lines
5.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#if HAVE_LIBCRYPTSETUP
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#include "alloc-util.h"
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#include "cryptsetup-util.h"
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#include "dlfcn-util.h"
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#include "log.h"
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static void *cryptsetup_dl = NULL;
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int (*sym_crypt_activate_by_passphrase)(struct crypt_device *cd, const char *name, int keyslot, const char *passphrase, size_t passphrase_size, uint32_t flags);
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#if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY
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int (*sym_crypt_activate_by_signed_key)(struct crypt_device *cd, const char *name, const char *volume_key, size_t volume_key_size, const char *signature, size_t signature_size, uint32_t flags);
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#endif
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int (*sym_crypt_activate_by_volume_key)(struct crypt_device *cd, const char *name, const char *volume_key, size_t volume_key_size, uint32_t flags);
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int (*sym_crypt_deactivate_by_name)(struct crypt_device *cd, const char *name, uint32_t flags);
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int (*sym_crypt_format)(struct crypt_device *cd, const char *type, const char *cipher, const char *cipher_mode, const char *uuid, const char *volume_key, size_t volume_key_size, void *params);
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void (*sym_crypt_free)(struct crypt_device *cd);
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const char *(*sym_crypt_get_dir)(void);
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int (*sym_crypt_get_verity_info)(struct crypt_device *cd, struct crypt_params_verity *vp);
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int (*sym_crypt_init)(struct crypt_device **cd, const char *device);
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int (*sym_crypt_init_by_name)(struct crypt_device **cd, const char *name);
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int (*sym_crypt_keyslot_add_by_volume_key)(struct crypt_device *cd, int keyslot, const char *volume_key, size_t volume_key_size, const char *passphrase, size_t passphrase_size);
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int (*sym_crypt_load)(struct crypt_device *cd, const char *requested_type, void *params);
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int (*sym_crypt_resize)(struct crypt_device *cd, const char *name, uint64_t new_size);
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int (*sym_crypt_set_data_device)(struct crypt_device *cd, const char *device);
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void (*sym_crypt_set_debug_level)(int level);
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void (*sym_crypt_set_log_callback)(struct crypt_device *cd, void (*log)(int level, const char *msg, void *usrptr), void *usrptr);
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int (*sym_crypt_volume_key_get)(struct crypt_device *cd, int keyslot, char *volume_key, size_t *volume_key_size, const char *passphrase, size_t passphrase_size);
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int dlopen_cryptsetup(void) {
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_cleanup_(dlclosep) void *dl = NULL;
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int r;
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if (cryptsetup_dl)
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return 0; /* Already loaded */
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dl = dlopen("libcryptsetup.so.12", RTLD_LAZY);
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if (!dl)
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return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
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"libcryptsetup support is not installed: %s", dlerror());
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r = dlsym_many_and_warn(
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dl,
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LOG_DEBUG,
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&sym_crypt_activate_by_passphrase, "crypt_activate_by_passphrase",
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#if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY
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&sym_crypt_activate_by_signed_key, "crypt_activate_by_signed_key",
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#endif
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&sym_crypt_activate_by_volume_key, "crypt_activate_by_volume_key",
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&sym_crypt_deactivate_by_name, "crypt_deactivate_by_name",
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&sym_crypt_format, "crypt_format",
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&sym_crypt_free, "crypt_free",
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&sym_crypt_get_dir, "crypt_get_dir",
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&sym_crypt_get_verity_info, "crypt_get_verity_info",
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&sym_crypt_init, "crypt_init",
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&sym_crypt_init_by_name, "crypt_init_by_name",
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&sym_crypt_keyslot_add_by_volume_key, "crypt_keyslot_add_by_volume_key",
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&sym_crypt_load, "crypt_load",
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&sym_crypt_resize, "crypt_resize",
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&sym_crypt_set_data_device, "crypt_set_data_device",
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&sym_crypt_set_debug_level, "crypt_set_debug_level",
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&sym_crypt_set_log_callback, "crypt_set_log_callback",
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&sym_crypt_volume_key_get, "crypt_volume_key_get",
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NULL);
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if (r < 0)
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return r;
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/* Note that we never release the reference here, because there's no real reason to, after all this
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* was traditionally a regular shared library dependency which lives forever too. */
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cryptsetup_dl = TAKE_PTR(dl);
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return 1;
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}
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static void cryptsetup_log_glue(int level, const char *msg, void *usrptr) {
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switch (level) {
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case CRYPT_LOG_NORMAL:
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level = LOG_NOTICE;
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break;
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case CRYPT_LOG_ERROR:
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level = LOG_ERR;
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break;
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case CRYPT_LOG_VERBOSE:
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level = LOG_INFO;
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break;
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case CRYPT_LOG_DEBUG:
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level = LOG_DEBUG;
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break;
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default:
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log_error("Unknown libcryptsetup log level: %d", level);
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level = LOG_ERR;
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}
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log_full(level, "%s", msg);
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}
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void cryptsetup_enable_logging(struct crypt_device *cd) {
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if (!cd)
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return;
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if (dlopen_cryptsetup() < 0) /* If this fails, let's gracefully ignore the issue, this is just debug
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* logging after all, and if this failed we already generated a debug
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* log message that should help to track things down. */
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return;
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sym_crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
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sym_crypt_set_debug_level(DEBUG_LOGGING ? CRYPT_DEBUG_ALL : CRYPT_DEBUG_NONE);
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}
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#endif
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