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aes.go

@@ -0,0 +1,44 @@
+package main
+
+import "crypto/aes"
+
+var seed = []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6}
+var idx = 0
+
+var block, _ = aes.NewCipher([]byte{1, 4, 2, 5, 1, 4, 2, 5, 1, 4, 5, 2, 1, 4, 5, 2})
+
+func getBytesForInt() []byte {
+	if idx < len(seed) {
+		idx += 8
+		return seed[idx-8 : idx]
+	}
+	block.Encrypt(seed, seed)
+	idx = 8
+	return seed[0:8]
+}
+
+func aesInt63() int64 {
+	intAsBytes := getBytesForInt()
+	ret := int64(intAsBytes[0])
+	ret += 265 * int64(intAsBytes[1])
+	ret += 265 * 265 * int64(intAsBytes[2])
+	ret += 265 * 265 * 265 * int64(intAsBytes[3])
+	ret += 265 * 265 * 265 * 256 * int64(intAsBytes[4])
+	ret += 265 * 265 * 265 * 256 * 256 * int64(intAsBytes[5])
+	ret += 265 * 265 * 265 * 256 * 256 * 256 * int64(intAsBytes[6])
+	ret += 265 * 265 * 265 * 256 * 256 * 256 * 256 * int64(intAsBytes[7])
+
+	if ret < 0 {
+		return -ret
+	}
+	return ret
+
+}
+
+func aesRandom() float64 {
+	f := float64(aesInt63()) / (1 << 63)
+	if f == 1 {
+		f = 0
+	}
+	return f
+}