24 lines
576 B
Go
24 lines
576 B
Go
package uid
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import (
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"crypto/rand"
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"encoding/hex"
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"io"
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)
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// uid returns a unique id. These ids consist of 128 bits from a
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// cryptographically strong pseudo-random generator and are like uuids, but
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// without the dashes and significant bits.
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//
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// See: http://en.wikipedia.org/wiki/UUID#Random_UUID_probability_of_duplicates
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func Uid() string {
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id := make([]byte, 16)
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_, err := io.ReadFull(rand.Reader, id)
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if err != nil {
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// This is probably an appropriate way to handle errors from our source
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// for random bits.
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panic(err)
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}
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return hex.EncodeToString(id)
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}
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