SPHINCS_golang

const (
	SUBTREE_HEIGHT   = 5
	TOTALTREE_HEIGHT = 60
	N_LEVELS         = (TOTALTREE_HEIGHT / SUBTREE_HEIGHT)
	SEED_BYTES       = 32
	WOTS_LOGW        = 4
	WOTS_LogL        = 7
	WOTS_SIGBYTES    = (WOTS_L * HASH_BYTES)

	SK_RAND_SEED_BYTES      = 32
	MESSAGE_HASH_SEED_BYTES = 32

	HORST_LOGT     = 16
	HORST_T        = (1 << HORST_LOGT)
	HORST_K        = 32
	HORST_SKBYTES  = 32
	HORST_SIGBYTES = (64*HASH_BYTES + (((HORST_LOGT-6)*HASH_BYTES)+HORST_SKBYTES)*HORST_K)

	WOTS_W        = (1 << WOTS_LOGW)
	WOTS_L1       = ((256 + WOTS_LOGW - 1) / WOTS_LOGW)
	WOTS_L        = 67 // for WOTS_W == 16
	WOTS_SIGBYTES = (WOTS_L * HASH_BYTES)
	HASHSIZE      = blake256.Size

	HASH_BYTES    = 32 // Has to be log(HORST_T)*HORST_K/8
	MSGHASH_BYTES = 64
	HASHC         = "expand 32-byte to 64-byte state!"
	SIGMA         = "expand 32-byte k"
	TAU           = "expand 16-byte k"
	CHACHAROUNDS  = 12
	N_MASKS       = (2 * (HORST_LOGT))
)

const (
	// PublicKeySize is the length of a SPHINCS-256 public key in bytes.
	PublicKeySize = (nMasks + 1) * HASHSIZE

	// PrivateKeySize is the length of a SPHINCS-256 private key in bytes.
	PrivateKeySize = seedBytes + PublicKeySize - HASHSIZE + skRandSeedBytes

	// SignatureSize is the length of a SPHINCS-256 signature in bytes.
	SignatureSize = messageHashSeedBytes + (TOTALTREE_HEIGHT+7)/8 + HORST_SIGBYTES + (TOTALTREE_HEIGHT/subtreeHeight)*WOTS_SIGBYTES + TOTALTREE_HEIGHT*HASHSIZE
)