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29 lines
560 B
Go
29 lines
560 B
Go
package build
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import (
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"crypto/rand"
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"crypto/sha1"
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"fmt"
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"io"
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)
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// createUID is a helper function that will
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// create a random, unique identifier.
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func createUID() string {
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c := sha1.New()
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r := createRandom()
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io.WriteString(c, string(r))
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s := fmt.Sprintf("%x", c.Sum(nil))
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return "drone-" + s[0:10]
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}
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// createRandom creates a random block of bytes
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// that we can use to generate unique identifiers.
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func createRandom() []byte {
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k := make([]byte, sha1.BlockSize)
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if _, err := io.ReadFull(rand.Reader, k); err != nil {
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return nil
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}
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return k
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}
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