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KEYS: Provide missing asymmetric key subops for new key type ops [ver #2]

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Provide the missing asymmetric key subops for new key type ops.  This
include query, encrypt, decrypt and create signature.  Verify signature
already exists.  Also provided are accessor functions for this:

	int query_asymmetric_key(const struct key *key,
				 struct kernel_pkey_query *info);

	int encrypt_blob(struct kernel_pkey_params *params,
			 const void *data, void *enc);
	int decrypt_blob(struct kernel_pkey_params *params,
			 const void *enc, void *data);
	int create_signature(struct kernel_pkey_params *params,
			     const void *data, void *enc);

The public_key_signature struct gains an encoding field to carry the
encoding for verify_signature().

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
David Howells
2018-10-09 17:47:07 +01:00
committed by James Morris
parent 00d60fd3b9
commit 5a30771832
6 changed files with 180 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/keys/asymmetric-subtype.h
View File

@@ -17,6 +17,8 @@
#include <linux/seq_file.h>
#include <keys/asymmetric-type.h>
struct kernel_pkey_query;
struct kernel_pkey_params;
struct public_key_signature;
/*
@@ -34,6 +36,13 @@ struct asymmetric_key_subtype {
/* Destroy a key of this subtype */
void (*destroy)(void *payload_crypto, void *payload_auth);
int (*query)(const struct kernel_pkey_params *params,
struct kernel_pkey_query *info);
/* Encrypt/decrypt/sign data */
int (*eds_op)(struct kernel_pkey_params *params,
const void *in, void *out);
/* Verify the signature on a key of this subtype (optional) */
int (*verify_signature)(const struct key *key,
const struct public_key_signature *sig);