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#ifndef CRYPTLIB_H
# define CRYPTLIB_H
struct cipher_data {
int init; /* 0 uninitialized */
int blocksize;
int aead;
int stream;
int ivsize;
int alignmask;
struct {
/* block ciphers */
struct crypto_ablkcipher *s;
struct ablkcipher_request *request;
/* AEAD ciphers */
struct crypto_aead *as;
struct aead_request *arequest;
struct cryptodev_result *result;
uint8_t iv[EALG_MAX_BLOCK_LEN];
} async;
};
int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
uint8_t *key, size_t keylen, int stream, int aead);
void cryptodev_cipher_deinit(struct cipher_data *cdata);
ssize_t cryptodev_cipher_decrypt(struct cipher_data *cdata,
const struct scatterlist *sg1,
struct scatterlist *sg2, size_t len);
ssize_t cryptodev_cipher_encrypt(struct cipher_data *cdata,
const struct scatterlist *sg1,
struct scatterlist *sg2, size_t len);
/* AEAD */
static inline void cryptodev_cipher_auth(struct cipher_data *cdata,
struct scatterlist *sg1, size_t len)
{
/* for some reason we _have_ to call that even for zero length sgs */
aead_request_set_assoc(cdata->async.arequest, len ? sg1 : NULL, len);
}
static inline void cryptodev_cipher_set_tag_size(struct cipher_data *cdata, int size)
{
if (likely(cdata->aead != 0))
crypto_aead_setauthsize(cdata->async.as, size);
}
static inline int cryptodev_cipher_get_tag_size(struct cipher_data *cdata)
{
if (likely(cdata->init && cdata->aead != 0))
return crypto_aead_authsize(cdata->async.as);
else
return 0;
}
static inline void cryptodev_cipher_set_iv(struct cipher_data *cdata,
void *iv, size_t iv_size)
{
memcpy(cdata->async.iv, iv, min(iv_size, sizeof(cdata->async.iv)));
}
static inline void cryptodev_cipher_get_iv(struct cipher_data *cdata,
void *iv, size_t iv_size)
{
memcpy(iv, cdata->async.iv, min(iv_size, sizeof(cdata->async.iv)));
}
/* Hash */
struct hash_data {
int init; /* 0 uninitialized */
int digestsize;
int alignmask;
struct {
struct crypto_ahash *s;
struct cryptodev_result *result;
struct ahash_request *request;
} async;
};
int cryptodev_hash_final(struct hash_data *hdata, void *output);
ssize_t cryptodev_hash_update(struct hash_data *hdata,
struct scatterlist *sg, size_t len);
int cryptodev_hash_reset(struct hash_data *hdata);
void cryptodev_hash_deinit(struct hash_data *hdata);
int cryptodev_hash_init(struct hash_data *hdata, const char *alg_name,
int hmac_mode, void *mackey, size_t mackeylen);
#endif
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