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Add internal helper to get key size by key description.

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This commit is contained in:
Ondrej Kozina
2025-05-07 14:18:01 +02:00
parent 0363ea7c57
commit 548de244c5
2 changed files with 39 additions and 0 deletions
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5
lib/internal.h
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@@ -243,6 +243,11 @@ int crypt_keyring_get_key_by_name(struct crypt_device *cd,
const char *key_description,
char **key,
size_t *key_size);
int crypt_keyring_get_keysize_by_name(struct crypt_device *cd,
const char *key_description,
size_t *r_key_size);
int crypt_use_keyring_for_vk(struct crypt_device *cd);
void crypt_unlink_key_from_thread_keyring(struct crypt_device *cd,
key_serial_t key_id);

34
lib/setup.c
View File

@@ -7552,6 +7552,40 @@ int crypt_keyring_get_key_by_name(struct crypt_device *cd,
return r;
}
int crypt_keyring_get_keysize_by_name(struct crypt_device *cd,
const char *key_description,
size_t *r_key_size)
{
int r;
key_serial_t kid;
if (!key_description || !r_key_size)
return -EINVAL;
log_dbg(cd, "Searching for kernel key by name %s.", key_description);
kid = keyring_find_key_id_by_name(key_description);
if (kid == -ENOTSUP) {
log_dbg(cd, "Kernel keyring features disabled.");
return -ENOTSUP;
} else if (kid < 0) {
log_dbg(cd, "keyring_find_key_id_by_name failed with errno %d.", errno);
return -EINVAL;
}
else if (kid == 0) {
log_dbg(cd, "keyring_find_key_id_by_name failed with errno %d.", ENOENT);
return -ENOENT;
}
log_dbg(cd, "Reading content of kernel key (id %" PRIi32 ").", kid);
r = keyring_read_keysize(kid, r_key_size);
if (r < 0)
log_dbg(cd, "keyring_read_keysize failed with errno %d.", errno);
return r;
}
/* internal only */
int crypt_key_in_keyring(struct crypt_device *cd)
{