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38 lines
1 KiB
Go
38 lines
1 KiB
Go
package utils
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import (
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"crypto/rand"
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"encoding/base64"
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)
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const tokenLength = 32
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// GenerateAccessToken will generate and return an access token.
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func GenerateAccessToken() (string, error) {
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return GenerateRandomString(tokenLength)
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}
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// generateRandomBytes returns securely generated random bytes.
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// It will return an error if the system's secure random
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// number generator fails to function correctly, in which
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// case the caller should not continue.
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func generateRandomBytes(n int) ([]byte, error) {
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b := make([]byte, n)
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_, err := rand.Read(b)
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// Note that err == nil only if we read len(b) bytes.
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if err != nil {
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return nil, err
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}
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return b, nil
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}
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// GenerateRandomString returns a URL-safe, base64 encoded
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// securely generated random string.
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// It will return an error if the system's secure random
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// number generator fails to function correctly, in which
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// case the caller should not continue.
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func GenerateRandomString(n int) (string, error) {
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b, err := generateRandomBytes(n)
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return base64.URLEncoding.EncodeToString(b), err
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}
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