xref: /openbmc/qemu/crypto/afalgpriv.h (revision f00f57f3)
1 /*
2  * QEMU Crypto af_alg support
3  *
4  * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
5  *
6  * Authors:
7  *    Longpeng(Mike) <longpeng2@huawei.com>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or
10  * (at your option) any later version.  See the COPYING file in the
11  * top-level directory.
12  */
13 
14 #ifndef QCRYPTO_AFALGPRIV_H
15 #define QCRYPTO_AFALGPRIV_H
16 
17 #include <linux/if_alg.h>
18 #include "crypto/cipher.h"
19 
20 #define SALG_TYPE_LEN_MAX 14
21 #define SALG_NAME_LEN_MAX 64
22 
23 #ifndef SOL_ALG
24 #define SOL_ALG 279
25 #endif
26 
27 #define AFALG_TYPE_CIPHER "skcipher"
28 #define AFALG_TYPE_HASH "hash"
29 
30 #define ALG_OPTYPE_LEN 4
31 #define ALG_MSGIV_LEN(len) (sizeof(struct af_alg_iv) + (len))
32 
33 typedef struct QCryptoAFAlg QCryptoAFAlg;
34 
35 struct QCryptoAFAlg {
36     QCryptoCipher base;
37 
38     int tfmfd;
39     int opfd;
40     struct msghdr *msg;
41     struct cmsghdr *cmsg;
42 };
43 
44 /**
45  * qcrypto_afalg_comm_alloc:
46  * @type: the type of crypto operation
47  * @name: the name of crypto operation
48  *
49  * Allocate a QCryptoAFAlg object and bind itself to
50  * a AF_ALG socket.
51  *
52  * Returns:
53  *  a new QCryptoAFAlg object, or NULL in error.
54  */
55 QCryptoAFAlg *
56 qcrypto_afalg_comm_alloc(const char *type, const char *name,
57                          Error **errp);
58 
59 /**
60  * afalg_comm_free:
61  * @afalg: the QCryptoAFAlg object
62  *
63  * Free the @afalg.
64  */
65 void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg);
66 
67 #endif
68