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Gift.bsv
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Gift.bsv
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package Gift;
import GiftRound :: *;
import InputLayer :: *;
import OutputLayer :: *;
import GiftCipher :: *;
typedef enum {
Init,
GetBdi,
PadFullWord
} InState deriving(Bits, Eq);
typedef enum {
OpIdle,
OpAbsorb,
OpPermute,
OpGetTag
} OpState deriving(Bits, Eq);
typedef TDiv#(CipherRounds, UnrollFactor) PermCycles;
// (* synthesize *)
module mkGift(CryptoCoreIfc);
Byte cipherPadByte = 8'h80;
let inLayer <- mkInputLayerNoExtraPad(cipherPadByte);
let outLayer <- mkOutputLayer;
let inState <- mkReg(Init);
let opState <- mkReg(OpIdle);
Reg#(Bool) isKey <- mkRegU;
Reg#(Bool) isCT <- mkRegU;
Reg#(Bool) isPTCT <- mkRegU;
Reg#(Bool) isNpub <- mkRegU;
Reg#(Bool) isAD <- mkRegU;
Reg#(Bool) isEoI <- mkRegU;
Reg#(Bool) isFirstADBlock <- mkRegU;
Reg#(Bool) isLastBlock <- mkRegU;
Reg#(Bool) nextGenTag <- mkRegU;
Reg#(GiftState) giftState <- mkRegU;
Reg#(KeyState) keyState <- mkRegU;
Reg#(RoundConstant) roundConstant <- mkRegU;
Reg#(HalfBlock) delta <- mkRegU;
Reg#(Bit#(TLog#(PermCycles))) roundCounter <- mkRegU;
Reg#(Bool) emptyM <- mkRegU;
Reg#(Bool) emptyMsg <- mkRegU;
Reg#(Bool) lastAdEmptyM <- mkRegU;
let set_isfirst <- mkPulseWire;
let unset_isfirst <- mkPulseWire;
// ==================================================== Rules =====================================================
(* fire_when_enabled, no_implicit_conditions *)
rule permutation if (opState == OpPermute);
match {.nextGS, .nextKS, .nextRC} = giftRound(giftState, keyState, roundConstant);
giftState <= nextGS;