cryptlib.h

   1 #ifndef CRYPTLIB_H
   2 # define CRYPTLIB_H
   3
   4 struct cipher_data {
   5         int init; /* 0 uninitialized */
   6         int blocksize;
   7         int aead;
   8         int stream;
   9         int ivsize;
  10         int alignmask;
  11         struct {
  12                 /* block ciphers */
  13                 struct crypto_ablkcipher *s;
  14                 struct ablkcipher_request *request;
  15
  16                 /* AEAD ciphers */
  17                 struct crypto_aead *as;
  18                 struct aead_request *arequest;
  19
  20                 struct cryptodev_result *result;
  21                 uint8_t iv[EALG_MAX_BLOCK_LEN];
  22         } async;
  23 };
  24
  25 int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
  26                           uint8_t *key, size_t keylen, int stream, int aead);
  27 void cryptodev_cipher_deinit(struct cipher_data *cdata);
  28 ssize_t cryptodev_cipher_decrypt(struct cipher_data *cdata,
  29                         const struct scatterlist *sg1,
  30                         struct scatterlist *sg2, size_t len);
  31 ssize_t cryptodev_cipher_encrypt(struct cipher_data *cdata,
  32                                 const struct scatterlist *sg1,
  33                                 struct scatterlist *sg2, size_t len);
  34
  35 /* AEAD */
  36 inline static void cryptodev_cipher_auth(struct cipher_data *cdata,
  37                                          struct scatterlist *sg1, size_t len)
  38 {
  39         /* for some reason we _have_ to call that even for zero length sgs */
  40         aead_request_set_assoc(cdata->async.arequest, len ? sg1 : NULL, len);
  41 }
  42
  43 inline static void cryptodev_cipher_set_tag_size(struct cipher_data *cdata, int size)
  44 {
  45         if (likely(cdata->aead != 0))
  46                 crypto_aead_setauthsize(cdata->async.as, size);
  47 }
  48
  49 inline static int cryptodev_cipher_get_tag_size(struct cipher_data *cdata)
  50 {
  51         if (likely(cdata->init && cdata->aead != 0))
  52                 return crypto_aead_authsize(cdata->async.as);
  53         else
  54                 return 0;
  55 }
  56
  57 inline static void cryptodev_cipher_set_iv(struct cipher_data *cdata,
  58                                 void *iv, size_t iv_size)
  59 {
  60         memcpy(cdata->async.iv, iv, min(iv_size, sizeof(cdata->async.iv)));
  61 }
  62
  63 inline static void cryptodev_cipher_get_iv(struct cipher_data *cdata,
  64                                 void *iv, size_t iv_size)
  65 {
  66         memcpy(iv, cdata->async.iv, min(iv_size, sizeof(cdata->async.iv)));
  67 }
  68
  69 /* Hash */
  70 struct hash_data {
  71         int init; /* 0 uninitialized */
  72         int digestsize;
  73         int alignmask;
  74         struct {
  75                 struct crypto_ahash *s;
  76                 struct cryptodev_result *result;
  77                 struct ahash_request *request;
  78         } async;
  79 };
  80
  81 int cryptodev_hash_final(struct hash_data *hdata, void *output);
  82 ssize_t cryptodev_hash_update(struct hash_data *hdata,
  83                         struct scatterlist *sg, size_t len);
  84 int cryptodev_hash_reset(struct hash_data *hdata);
  85 void cryptodev_hash_deinit(struct hash_data *hdata);
  86 int cryptodev_hash_init(struct hash_data *hdata, const char *alg_name,
  87                         int hmac_mode, void *mackey, size_t mackeylen);
  88
  89
  90 #endif