mirror of
https://gogs.blitter.com/RLabs/xs
synced 2024-08-14 10:26:42 +00:00
f5be3578a8
2/3 Added vendor/ dir to lock down dependent pkg versions.
The author of git.schwanenlied.me/yawning/{chacha20,newhope,kyber}.git has copied
their repos to gitlab.com/yawning/ but some imports of chacha20 from newhope still
inconsistently refer to git.schwanenlied.me/, breaking build.
Licenses for chacha20 also changed from CC0 to AGPL, which may or may not be an
issue. Until the two aforementioned issues are resolved, locking to last-good
versions is probably the best way forward for now.
To build with vendored deps, use make VENDOR=1 clean all
3/3 Moved body of CI push script into bacillus/
125 lines
2.8 KiB
Go
125 lines
2.8 KiB
Go
// MersenneTwister
|
|
// From https://gist.github.com/cuixin/1b8b6bd7bfbde8fe76e8
|
|
package MersenneTwister
|
|
|
|
import (
|
|
"crypto"
|
|
|
|
_ "crypto/sha512"
|
|
)
|
|
|
|
const N = 312
|
|
const M = 156
|
|
const MATRIX_A = 0xB5026F5AA96619E9
|
|
const UPPER_MASK = 0xFFFFFFFF80000000
|
|
const LOWER_MASK = 0x7FFFFFFF
|
|
|
|
type MT19937_64 struct {
|
|
array [N]uint64 //state vector
|
|
index uint64 // array index
|
|
}
|
|
|
|
func New() *MT19937_64 {
|
|
return &MT19937_64{
|
|
index: N + 1,
|
|
}
|
|
}
|
|
|
|
func (m *MT19937_64) _initstate() {
|
|
// Recommendations abound that mtwist should throw away 1st 10000 or so
|
|
// of initial state
|
|
for i := 0; i < 10000; i++ {
|
|
_ = m.Int63()
|
|
}
|
|
}
|
|
|
|
func (m *MT19937_64) Seed(seed int64) {
|
|
m.array[0] = uint64(seed)
|
|
for m.index = 1; m.index < N; m.index++ {
|
|
m.array[m.index] = (6364136223846793005*(m.array[m.index-1]^(m.array[m.index-1]>>62)) + m.index)
|
|
}
|
|
m._initstate()
|
|
//fmt.Printf("final array(s):%v\n", m.array)
|
|
}
|
|
|
|
func _bytesToUint64(b []byte) (r uint64) {
|
|
r = uint64(b[0])<<56 +
|
|
uint64(b[1])<<48 +
|
|
uint64(b[2])<<40 +
|
|
uint64(b[3])<<32 +
|
|
uint64(b[4])<<24 +
|
|
uint64(b[5])<<16 +
|
|
uint64(b[6])<<8 +
|
|
uint64(b[7])
|
|
return
|
|
}
|
|
|
|
func (m *MT19937_64) SeedFullState(s []byte) {
|
|
//fmt.Printf("s:%v\n", s)
|
|
if len(s) < N*8 {
|
|
// Expand s if shorter than mtwist array state
|
|
ha := crypto.SHA512
|
|
h := ha.New()
|
|
shortfallChunks := ((N * 8) - len(s)) / h.Size()
|
|
//shortfallRem := ((N * 8) - len(s)) % h.Size()
|
|
//fmt.Printf("chunks, rem:%d,%d\n", shortfallChunks, shortfallRem)
|
|
idx := 0
|
|
for idx < shortfallChunks {
|
|
_, _ = h.Write(s)
|
|
s = h.Sum(s)
|
|
idx += 1
|
|
}
|
|
_, _ = h.Write(s)
|
|
s = h.Sum(s)
|
|
//fmt.Printf("exp s:%v\n", s)
|
|
}
|
|
|
|
for idx := 0; idx < N; {
|
|
m.array[idx] = _bytesToUint64(s[idx*8 : (idx*8)+8])
|
|
idx += 1
|
|
}
|
|
//fmt.Printf("final array(xs):%v\n", m.array)
|
|
m.index = 0
|
|
m._initstate()
|
|
}
|
|
|
|
func (m *MT19937_64) Int63() uint64 {
|
|
var i int
|
|
var x uint64
|
|
mag01 := []uint64{0, MATRIX_A}
|
|
if m.index >= N {
|
|
if m.index == N+1 {
|
|
m.Seed(int64(5489))
|
|
}
|
|
|
|
for i = 0; i < N-M; i++ {
|
|
x = (m.array[i] & UPPER_MASK) | (m.array[i+1] & LOWER_MASK)
|
|
m.array[i] = m.array[i+(M)] ^ (x >> 1) ^ mag01[int(x&uint64(1))]
|
|
}
|
|
for ; i < N-1; i++ {
|
|
x = (m.array[i] & UPPER_MASK) | (m.array[i+1] & LOWER_MASK)
|
|
m.array[i] = m.array[i+(M-N)] ^ (x >> 1) ^ mag01[int(x&uint64(1))]
|
|
}
|
|
x = (m.array[N-1] & UPPER_MASK) | (m.array[0] & LOWER_MASK)
|
|
m.array[N-1] = m.array[M-1] ^ (x >> 1) ^ mag01[int(x&uint64(1))]
|
|
m.index = 0
|
|
}
|
|
x = m.array[m.index]
|
|
m.index++
|
|
x ^= (x >> 29) & 0x5555555555555555
|
|
x ^= (x << 17) & 0x71D67FFFEDA60000
|
|
x ^= (x << 37) & 0xFFF7EEE000000000
|
|
x ^= (x >> 43)
|
|
return x
|
|
}
|
|
|
|
func (m *MT19937_64) IntN(value uint64) uint64 {
|
|
return m.Int63() % value
|
|
}
|
|
|
|
func (m *MT19937_64) Read(p []byte) (n int, err error) {
|
|
for idx := 0; idx < len(p); idx++ {
|
|
p[idx] = byte( (m.Int63()>>47) % 256)
|
|
}
|
|
return n, nil
|
|
}
|