32 lines
613 B
Go
32 lines
613 B
Go
package rnd
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import (
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"crypto/rand"
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"encoding/binary"
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"fmt"
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"strconv"
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)
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// Token returns a random token with length of up to 10 characters.
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func Token(size uint) string {
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if size > 10 || size < 1 {
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panic(fmt.Sprintf("size out of range: %d", size))
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}
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result := make([]byte, 0, 14)
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b := make([]byte, 8)
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if _, err := rand.Read(b); err != nil {
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panic(err)
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}
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randomInt := binary.BigEndian.Uint64(b)
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result = append(result, strconv.FormatUint(randomInt, 36)...)
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for i := len(result); i < cap(result); i++ {
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result = append(result, byte(123-(cap(result)-i)))
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}
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return string(result[:size])
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}
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