yaole
28 lines
516 B
Go
28 lines
516 B
Go
package entropy
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import (
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"crypto/rand"
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"sync"
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)
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type OSEntropySource struct {
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mu sync.Mutex
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}
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func (e *OSEntropySource) GetEntropy(minEntropy int64, minEntropyInputLength int64, maxEntropyInputLength int64) ([]byte, error) {
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//使用互斥锁保证熵源的独占性
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e.mu.Lock()
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defer e.mu.Unlock()
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n := minEntropy
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if n < minEntropyInputLength {
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n = minEntropyInputLength
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}
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entropy := make([]byte, n)
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if _, err := rand.Reader.Read(entropy); err != nil {
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return nil, err
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}
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return entropy, nil
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}
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