mdw@git.distorted.org.uk Git - secnet/blob - magic.h

   1 /* Magic numbers used within secnet */
   2
   3 #ifndef magic_h
   4 #define magic_h
   5
   6 #define LABEL_NAK     0x00000000
   7 #define LABEL_MSG0    0x00020200
   8 #define LABEL_MSG1    0x01010101
   9 #define LABEL_MSG2    0x02020202
  10 #define LABEL_MSG3    0x03030303
  11 #define LABEL_MSG3BIS 0x13030313
  12 #define LABEL_MSG4    0x04040404
  13 #define LABEL_MSG5    0x05050505
  14 #define LABEL_MSG6    0x06060606
  15 #define LABEL_MSG7    0x07070707
  16 #define LABEL_MSG8    0x08080808
  17 #define LABEL_MSG9    0x09090909
  18 #define LABEL_PROD    0x0a0a0a0a
  19
  20 /* uses of the 32-bit capability bitmap */
  21 #define CAPAB_EARLY           0x00000000 /* no Early flags yet (see NOTES) */
  22 #define CAPAB_TRANSFORM_MASK  0x0000ffff
  23 /* remaining 16 bits are unused */
  24
  25 /*
  26  * The transform capability mask is a set of bits, one for each
  27  * transform supported.  The transform capability numbers are set in
  28  * the configuration (and should correspond between the two sites),
  29  * although there are sensible defaults.
  30  *
  31  * Advertising a nonzero transform capability mask promises that
  32  * the receiver understands LABEL_MSG3BIS messages, which
  33  * contain an additional byte specifying the transform capability
  34  * number actually chosen by the MSG3 sender.
  35  *
  36  * Aside from that, an empty bitmask is treated the same as
  37  *  1u<<CAPAB_TRANSFORMNUM_ANCIENT
  38  */
  39
  40 /* bit indices, 0 is ls bit */
  41 #define CAPAB_TRANSFORMNUM_USER_MIN              0
  42 #define CAPAB_TRANSFORMNUM_USER_MAX              7
  43 #define CAPAB_TRANSFORMNUM_SERPENT256CBC         8
  44 #define CAPAB_TRANSFORMNUM_EAXSERPENT            9
  45 #define CAPAB_TRANSFORMNUM_MAX                  15
  46
  47 #define CAPAB_TRANSFORMNUM_ANCIENT CAPAB_TRANSFORMNUM_SERPENT256CBC
  48
  49 #endif /* magic_h */