Commit b6f61c31 authored by David Howells's avatar David Howells
Browse files

keys: Implement update for the big_key type 



Implement the ->update op for the big_key type.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
parent 521fd61c

include/keys/big_key-type.h

+1 −0
Original line number Diff line number Diff line
@@ -18,5 +18,6 @@ extern void big_key_revoke(struct key *key); 
extern void big_key_destroy(struct key *key);

extern void big_key_describe(const struct key *big_key, struct seq_file *m);

extern long big_key_read(const struct key *key, char *buffer, size_t buflen);

extern int big_key_update(struct key *key, struct key_preparsed_payload *prep);



#endif /* _KEYS_BIG_KEY_TYPE_H */

security/keys/big_key.c

+18 −1
Original line number Diff line number Diff line
@@ -47,7 +47,7 @@ struct key_type key_type_big_key = { 
	.destroy		= big_key_destroy,

	.describe		= big_key_describe,

	.read			= big_key_read,

	/* no ->update(); don't add it without changing chacha20poly1305's nonce */

	.update			= big_key_update,

};



/*
@@ -191,6 +191,23 @@ void big_key_destroy(struct key *key) 
	key->payload.data[big_key_data] = NULL;

}



/*

 * Update a big key

 */

int big_key_update(struct key *key, struct key_preparsed_payload *prep)

{

	int ret;



	ret = key_payload_reserve(key, prep->datalen);

	if (ret < 0)

		return ret;



	if (key_is_positive(key))

		big_key_destroy(key);



	return generic_key_instantiate(key, prep);

}



/*

 * describe the big_key key

 */