drivers/net/wireless/hostap/hostap_crypt.h

   1 #ifndef PRISM2_CRYPT_H
   2 #define PRISM2_CRYPT_H
   3
   4 struct hostap_crypto_ops {
   5         char *name;
   6
   7         /* init new crypto context (e.g., allocate private data space,
   8          * select IV, etc.); returns NULL on failure or pointer to allocated
   9          * private data on success */
  10         void * (*init)(int keyidx);
  11
  12         /* deinitialize crypto context and free allocated private data */
  13         void (*deinit)(void *priv);
  14
  15         /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
  16          * value from decrypt_mpdu is passed as the keyidx value for
  17          * decrypt_msdu. skb must have enough head and tail room for the
  18          * encryption; if not, error will be returned; these functions are
  19          * called for all MPDUs (i.e., fragments).
  20          */
  21         int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  22         int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  23
  24         /* These functions are called for full MSDUs, i.e. full frames.
  25          * These can be NULL if full MSDU operations are not needed. */
  26         int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
  27         int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
  28                             void *priv);
  29
  30         int (*set_key)(void *key, int len, u8 *seq, void *priv);
  31         int (*get_key)(void *key, int len, u8 *seq, void *priv);
  32
  33         /* procfs handler for printing out key information and possible
  34          * statistics */
  35         char * (*print_stats)(char *p, void *priv);
  36
  37         /* maximum number of bytes added by encryption; encrypt buf is
  38          * allocated with extra_prefix_len bytes, copy of in_buf, and
  39          * extra_postfix_len; encrypt need not use all this space, but
  40          * the result must start at the beginning of the buffer and correct
  41          * length must be returned */
  42         int extra_prefix_len, extra_postfix_len;
  43 };
  44
  45
  46 int hostap_register_crypto_ops(struct hostap_crypto_ops *ops);
  47 int hostap_unregister_crypto_ops(struct hostap_crypto_ops *ops);
  48 struct hostap_crypto_ops * hostap_get_crypto_ops(const char *name);
  49
  50 #endif /* PRISM2_CRYPT_H */