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25 lines
674 B
Go
25 lines
674 B
Go
package random
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import (
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"crypto/rand"
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"encoding/binary"
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"math/big"
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"github.com/navidrome/navidrome/utils/number"
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)
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// Int64N returns a random int64 between 0 and max.
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// This is a reimplementation of math/rand/v2.Int64N using a cryptographically secure random number generator.
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func Int64N[T number.Integer](max T) int64 {
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rnd, _ := rand.Int(rand.Reader, big.NewInt(int64(max)))
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return rnd.Int64()
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}
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// Uint64 returns a random uint64.
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// This is a reimplementation of math/rand/v2.Uint64 using a cryptographically secure random number generator.
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func Uint64() uint64 {
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buffer := make([]byte, 8)
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_, _ = rand.Read(buffer)
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return binary.BigEndian.Uint64(buffer)
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}
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