yaole
46 lines
814 B
Go
46 lines
814 B
Go
package drng
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import (
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"bytes"
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"math"
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"xdx.jelly/xgcl/grand/drng/entropy"
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"xdx.jelly/xgcl/grand/drng/internal"
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)
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const ALPHA = 9.5367431640625e-07 // = 2^(-20)
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func next(source entropy.EntropySource) []byte {
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b, err := source.GetEntropy(internal.MinEntropyInputLength, internal.MinEntropyInputLength, internal.MaxEntropyInputLength)
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if err != nil {
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return nil
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}
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return b
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}
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// 连续健康测试
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func RepeatCounterHealthyTests(source entropy.EntropySource, n int, H int) bool {
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C := 1 + int64(math.Ceil(-math.Log2(ALPHA)/float64(H)))
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A := next(source)
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if A == nil {
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return false
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}
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B := int64(1)
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for i := 0; i < n; i++ {
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X := next(source)
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if X == nil {
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return false
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}
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if bytes.Equal(X, A) {
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B++
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}
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if B >= C {
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return false
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} else {
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A = X
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B = 1
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}
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}
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return true
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}
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