39 lines
578 B
Go
39 lines
578 B
Go
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package langext
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import (
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"crypto/rand"
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"io"
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"math"
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"math/big"
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)
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func RandBytes(size int) []byte {
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b := make([]byte, size)
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_, err := io.ReadFull(rand.Reader, b)
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if err != nil {
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panic(err)
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}
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return b
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}
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func RandBase62(rlen int) string {
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ecs := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
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bi52 := big.NewInt(int64(len(ecs)))
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randMax := big.NewInt(math.MaxInt64)
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r := ""
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for i := 0; i < rlen; i++ {
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v, err := rand.Int(rand.Reader, randMax)
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if err != nil {
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panic(err)
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}
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r += string(ecs[v.Mod(v, bi52).Int64()])
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}
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return r
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}
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