22 lines
446 B
Go
22 lines
446 B
Go
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/*
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Package serial provides serial number related functionality.
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*/
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package serial
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import (
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"crypto/rand"
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"io"
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"math/big"
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)
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const randBits = 160
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// Rand returns a random serial number with 159 bits of entropy.
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func Rand() *big.Int {
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q := make([]byte, randBits/8)
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io.ReadFull(rand.Reader, q)
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// this just means all serial numbers are justified to the same bitlen, which is nice for tools!
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q[0] |= 0x80
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return big.NewInt(0).SetBytes(q)
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}
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