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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "alloc-util.h"
#include "ask-password-api.h"
#include "env-util.h"
#include "hexdecoct.h"
#include "json.h"
#include "log.h"
#include "luks2-tpm2.h"
#include "parse-util.h"
#include "random-util.h"
#include "strv.h"
#include "tpm2-util.h"
int acquire_luks2_key(
const char *device,
uint32_t hash_pcr_mask,
uint16_t pcr_bank,
const void *pubkey,
size_t pubkey_size,
uint32_t pubkey_pcr_mask,
const char *signature_path,
const char *pin,
uint16_t primary_alg,
const void *key_data,
size_t key_data_size,
const void *policy_hash,
size_t policy_hash_size,
TPM2Flags flags,
void **ret_decrypted_key,
size_t *ret_decrypted_key_size) {
_cleanup_(json_variant_unrefp) JsonVariant *signature_json = NULL;
_cleanup_free_ char *auto_device = NULL;
int r;
assert(ret_decrypted_key);
assert(ret_decrypted_key_size);
if (!device) {
r = tpm2_find_device_auto(LOG_DEBUG, &auto_device);
if (r == -ENODEV)
return -EAGAIN; /* Tell the caller to wait for a TPM2 device to show up */
if (r < 0)
return r;
device = auto_device;
}
if ((flags & TPM2_FLAGS_USE_PIN) && !pin)
return -ENOANO;
if (pubkey_pcr_mask != 0) {
r = tpm2_load_pcr_signature(signature_path, &signature_json);
if (r < 0)
return r;
}
return tpm2_unseal(
device,
hash_pcr_mask,
pcr_bank,
pubkey, pubkey_size,
pubkey_pcr_mask,
signature_json,
pin,
primary_alg,
key_data, key_data_size,
policy_hash, policy_hash_size,
ret_decrypted_key, ret_decrypted_key_size);
}
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