first commit

2026-02-17 13:06:23 +08:00
commit 7cbd3d061d
349 changed files with 126558 additions and 0 deletions
@@ -0,0 +1,151 @@
+package baseutils
+
+const (
+	msg = "a Top Secret secret"
+	key = "this is my secret key"
+)
+
+// RandCtx64 64位随机数
+type RandCtx64 struct {
+	RandCnt uint64
+	Seed    [256]uint64
+	MM      [256]uint64
+	AA      uint64
+	BB      uint64
+	CC      uint64
+}
+
+// CreateISAacInst 创建新的
+func CreateISAacInst(encKey uint64) *RandCtx64 {
+	randCtx64 := &RandCtx64{}
+	randCtx64.RandCnt = 255
+	randCtx64.AA = 0
+	randCtx64.BB = 0
+	randCtx64.CC = 0
+	Rand64Init(randCtx64, encKey)
+	return randCtx64
+}
+
+// Rand64Init 初始化
+func Rand64Init(randCtx64 *RandCtx64, encKey uint64) {
+	a := uint64(0x9e3779b97f4a7c13)
+	b := uint64(0x9e3779b97f4a7c13)
+	c := uint64(0x9e3779b97f4a7c13)
+	d := uint64(0x9e3779b97f4a7c13)
+	e := uint64(0x9e3779b97f4a7c13)
+	f := uint64(0x9e3779b97f4a7c13)
+	g := uint64(0x9e3779b97f4a7c13)
+	h := uint64(0x9e3779b97f4a7c13)
+
+	randCtx64.Seed[0] = encKey
+	for index := 1; index < 256; index++ {
+		randCtx64.Seed[index] = 0
+	}
+
+	for index := 0; index < 4; index++ {
+		a, b, c, d, e, f, g, h = mix64(a, b, c, d, e, f, g, h)
+	}
+
+	for index := 0; index < 256; index += 8 {
+		a += randCtx64.Seed[index]
+		b += randCtx64.Seed[index+1]
+		c += randCtx64.Seed[index+2]
+		d += randCtx64.Seed[index+3]
+		e += randCtx64.Seed[index+4]
+		f += randCtx64.Seed[index+5]
+		g += randCtx64.Seed[index+6]
+		h += randCtx64.Seed[index+7]
+		a, b, c, d, e, f, g, h = mix64(a, b, c, d, e, f, g, h)
+		randCtx64.MM[index] = a
+		randCtx64.MM[index+1] = b
+		randCtx64.MM[index+2] = c
+		randCtx64.MM[index+3] = d
+		randCtx64.MM[index+4] = e
+		randCtx64.MM[index+5] = f
+		randCtx64.MM[index+6] = g
+		randCtx64.MM[index+7] = h
+	}
+
+	for index := 0; index < 256; index += 8 {
+		a += randCtx64.MM[index]
+		b += randCtx64.MM[index+1]
+		c += randCtx64.MM[index+2]
+		d += randCtx64.MM[index+3]
+		e += randCtx64.MM[index+4]
+		f += randCtx64.MM[index+5]
+		g += randCtx64.MM[index+6]
+		h += randCtx64.MM[index+7]
+		a, b, c, d, e, f, g, h = mix64(a, b, c, d, e, f, g, h)
+		randCtx64.MM[index] = a
+		randCtx64.MM[index+1] = b
+		randCtx64.MM[index+2] = c
+		randCtx64.MM[index+3] = d
+		randCtx64.MM[index+4] = e
+		randCtx64.MM[index+5] = f
+		randCtx64.MM[index+6] = g
+		randCtx64.MM[index+7] = h
+	}
+	isAAC64(randCtx64)
+}
+
+func mix64(a uint64, b uint64, c uint64, d uint64, e uint64, f uint64, g uint64, h uint64) (uint64, uint64, uint64, uint64, uint64, uint64, uint64, uint64) {
+	a -= e
+	f ^= h >> 9
+	h += a
+	b -= f
+	g ^= a << 9
+	a += b
+	c -= g
+	h ^= b >> 23
+	b += c
+	d -= h
+	a ^= c << 15
+	c += d
+	e -= a
+	b ^= d >> 14
+	d += e
+	f -= b
+	c ^= e << 20
+	e += f
+	g -= c
+	d ^= f >> 17
+	f += g
+	h -= d
+	e ^= g << 14
+	g += h
+	return a, b, c, d, e, f, g, h
+}
+
+func isAAC64(randCtx64 *RandCtx64) {
+	randCtx64.CC++
+	randCtx64.BB += randCtx64.CC
+	for i, x := range randCtx64.MM {
+		switch i % 4 {
+		case 0:
+			randCtx64.AA = ^(randCtx64.AA ^ randCtx64.AA<<21)
+		case 1:
+			randCtx64.AA = randCtx64.AA ^ randCtx64.AA>>5
+		case 2:
+			randCtx64.AA = randCtx64.AA ^ randCtx64.AA<<12
+		case 3:
+			randCtx64.AA = randCtx64.AA ^ randCtx64.AA>>33
+		}
+		randCtx64.AA += randCtx64.MM[(i+128)%256]
+		y := randCtx64.MM[(x>>3)%256] + randCtx64.AA + randCtx64.BB
+		randCtx64.MM[i] = y
+		randCtx64.BB = randCtx64.MM[(y>>11)%256] + x
+		randCtx64.Seed[i] = randCtx64.BB
+	}
+}
+
+// ISAacRandom 随机一个整数
+func ISAacRandom(randCtx64 *RandCtx64) (r uint64) {
+	r = randCtx64.Seed[randCtx64.RandCnt]
+	if randCtx64.RandCnt == 0 {
+		isAAC64(randCtx64)
+		randCtx64.RandCnt = 255
+	} else {
+		randCtx64.RandCnt--
+	}
+	return
+}