1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ */
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #ifndef CRYPTLIB_H
4*4882a593Smuzhiyun # define CRYPTLIB_H
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/version.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct cryptodev_result {
9*4882a593Smuzhiyun struct completion completion;
10*4882a593Smuzhiyun int err;
11*4882a593Smuzhiyun };
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "cipherapi.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun struct cipher_data {
16*4882a593Smuzhiyun int init; /* 0 uninitialized */
17*4882a593Smuzhiyun int blocksize;
18*4882a593Smuzhiyun int aead;
19*4882a593Smuzhiyun int stream;
20*4882a593Smuzhiyun int ivsize;
21*4882a593Smuzhiyun int alignmask;
22*4882a593Smuzhiyun struct {
23*4882a593Smuzhiyun /* block ciphers */
24*4882a593Smuzhiyun cryptodev_crypto_blkcipher_t *s;
25*4882a593Smuzhiyun cryptodev_blkcipher_request_t *request;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun /* AEAD ciphers */
28*4882a593Smuzhiyun struct crypto_aead *as;
29*4882a593Smuzhiyun struct aead_request *arequest;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun struct cryptodev_result result;
32*4882a593Smuzhiyun uint8_t iv[EALG_MAX_BLOCK_LEN];
33*4882a593Smuzhiyun } async;
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
37*4882a593Smuzhiyun uint8_t *key, size_t keylen, int stream, int aead);
38*4882a593Smuzhiyun void cryptodev_cipher_deinit(struct cipher_data *cdata);
39*4882a593Smuzhiyun int cryptodev_get_cipher_key(uint8_t *key, struct session_op *sop, int aead);
40*4882a593Smuzhiyun int cryptodev_get_cipher_keylen(unsigned int *keylen, struct session_op *sop,
41*4882a593Smuzhiyun int aead);
42*4882a593Smuzhiyun ssize_t cryptodev_cipher_decrypt(struct cipher_data *cdata,
43*4882a593Smuzhiyun const struct scatterlist *sg1,
44*4882a593Smuzhiyun struct scatterlist *sg2, size_t len);
45*4882a593Smuzhiyun ssize_t cryptodev_cipher_encrypt(struct cipher_data *cdata,
46*4882a593Smuzhiyun const struct scatterlist *sg1,
47*4882a593Smuzhiyun struct scatterlist *sg2, size_t len);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun /* AEAD */
cryptodev_cipher_auth(struct cipher_data * cdata,struct scatterlist * sg1,size_t len)50*4882a593Smuzhiyun static inline void cryptodev_cipher_auth(struct cipher_data *cdata,
51*4882a593Smuzhiyun struct scatterlist *sg1, size_t len)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun /* for some reason we _have_ to call that even for zero length sgs */
54*4882a593Smuzhiyun #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0))
55*4882a593Smuzhiyun aead_request_set_assoc(cdata->async.arequest, len ? sg1 : NULL, len);
56*4882a593Smuzhiyun #else
57*4882a593Smuzhiyun aead_request_set_ad(cdata->async.arequest, len);
58*4882a593Smuzhiyun #endif
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
cryptodev_cipher_set_tag_size(struct cipher_data * cdata,int size)61*4882a593Smuzhiyun static inline void cryptodev_cipher_set_tag_size(struct cipher_data *cdata, int size)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun if (likely(cdata->aead != 0))
64*4882a593Smuzhiyun crypto_aead_setauthsize(cdata->async.as, size);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
cryptodev_cipher_get_tag_size(struct cipher_data * cdata)67*4882a593Smuzhiyun static inline int cryptodev_cipher_get_tag_size(struct cipher_data *cdata)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun if (likely(cdata->init && cdata->aead != 0))
70*4882a593Smuzhiyun return crypto_aead_authsize(cdata->async.as);
71*4882a593Smuzhiyun else
72*4882a593Smuzhiyun return 0;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
cryptodev_cipher_set_iv(struct cipher_data * cdata,void * iv,size_t iv_size)75*4882a593Smuzhiyun static inline void cryptodev_cipher_set_iv(struct cipher_data *cdata,
76*4882a593Smuzhiyun void *iv, size_t iv_size)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun memcpy(cdata->async.iv, iv, min(iv_size, sizeof(cdata->async.iv)));
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
cryptodev_cipher_get_iv(struct cipher_data * cdata,void * iv,size_t iv_size)81*4882a593Smuzhiyun static inline void cryptodev_cipher_get_iv(struct cipher_data *cdata,
82*4882a593Smuzhiyun void *iv, size_t iv_size)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun memcpy(iv, cdata->async.iv, min(iv_size, sizeof(cdata->async.iv)));
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /* Hash */
88*4882a593Smuzhiyun struct hash_data {
89*4882a593Smuzhiyun int init; /* 0 uninitialized */
90*4882a593Smuzhiyun int digestsize;
91*4882a593Smuzhiyun int alignmask;
92*4882a593Smuzhiyun struct {
93*4882a593Smuzhiyun struct crypto_ahash *s;
94*4882a593Smuzhiyun struct cryptodev_result result;
95*4882a593Smuzhiyun struct ahash_request *request;
96*4882a593Smuzhiyun } async;
97*4882a593Smuzhiyun };
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun int cryptodev_hash_final(struct hash_data *hdata, void *output);
100*4882a593Smuzhiyun ssize_t cryptodev_hash_update(struct hash_data *hdata,
101*4882a593Smuzhiyun struct scatterlist *sg, size_t len);
102*4882a593Smuzhiyun int cryptodev_hash_reset(struct hash_data *hdata);
103*4882a593Smuzhiyun void cryptodev_hash_deinit(struct hash_data *hdata);
104*4882a593Smuzhiyun int cryptodev_hash_init(struct hash_data *hdata, const char *alg_name,
105*4882a593Smuzhiyun int hmac_mode, void *mackey, size_t mackeylen);
106*4882a593Smuzhiyun #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29))
107*4882a593Smuzhiyun int cryptodev_hash_copy(struct hash_data *dst, struct hash_data *src);
108*4882a593Smuzhiyun #endif
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun #endif
112