curve.h

   1 #ifndef CURVE_H
   2 #define CURVE_H
   3
   4 #include "locking.h"
   5 #include "built_in.h"
   6 #include "ioops.h"
   7 #include "rnd.h"
   8 #include "taia.h"
   9 #include "crypto.h"
  10
  11 struct curve25519_proto {
  12         unsigned char enonce[crypto_box_noncebytes] __aligned_16;
  13         unsigned char dnonce[crypto_box_noncebytes] __aligned_16;
  14         unsigned char key[crypto_box_beforenmbytes] __aligned_16;
  15 };
  16
  17 struct curve25519_struct {
  18         unsigned char *enc, *dec;
  19         size_t enc_size, dec_size;
  20         struct spinlock enc_lock, dec_lock;
  21 };
  22
  23 extern void curve25519_selftest(void);
  24 extern void curve25519_alloc_or_maybe_die(struct curve25519_struct *curve);
  25 extern void curve25519_free(void *curve);
  26 extern void curve25519_proto_init(struct curve25519_proto *proto,
  27                                   unsigned char *pubkey_remote, size_t len);
  28 extern int curve25519_pubkey_hexparse_32(unsigned char *bin, size_t blen,
  29                                          const char *ascii, size_t alen);
  30
  31 extern ssize_t curve25519_encode(struct curve25519_struct *curve,
  32                                  struct curve25519_proto *proto,
  33                                  unsigned char *plaintext, size_t size,
  34                                  unsigned char **ciphertext);
  35 extern ssize_t curve25519_decode(struct curve25519_struct *curve,
  36                                  struct curve25519_proto *proto,
  37                                  unsigned char *ciphertext, size_t size,
  38                                  unsigned char **plaintext,
  39                                  struct taia *arrival_taia);
  40
  41 #endif /* CURVE_H */