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@ -6,6 +6,7 @@ import (
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"crypto/rand"
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"errors"
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"io"
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"math/big"
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"time"
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log "github.com/sirupsen/logrus"
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@ -52,8 +53,8 @@ func CryptoRandRead(buf []byte) {
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RandRead(rand.Reader, buf)
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}
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func RandRead(randSource io.Reader, buf []byte) {
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_, err := randSource.Read(buf)
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func backoff(f func() error) {
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err := f()
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if err == nil {
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return
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}
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@ -61,12 +62,36 @@ func RandRead(randSource io.Reader, buf []byte) {
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100 * time.Millisecond, 300 * time.Millisecond, 500 * time.Millisecond, 1 * time.Second,
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3 * time.Second, 5 * time.Second}
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for i := 0; i < 10; i++ {
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log.Errorf("Failed to get random bytes: %v. Retrying...", err)
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_, err = randSource.Read(buf)
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log.Errorf("Failed to get random: %v. Retrying...", err)
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err = f()
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if err == nil {
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return
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}
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time.Sleep(waitDur[i])
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}
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log.Fatal("Cannot get random bytes after 10 retries")
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log.Fatal("Cannot get random after 10 retries")
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}
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func RandRead(randSource io.Reader, buf []byte) {
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backoff(func() error {
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_, err := randSource.Read(buf)
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return err
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})
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}
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func RandItem[T any](list []T) T {
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return list[RandInt(len(list))]
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}
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func RandInt(n int) int {
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s := new(int)
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backoff(func() error {
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size, err := rand.Int(rand.Reader, big.NewInt(int64(n)))
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if err != nil {
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return err
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}
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*s = int(size.Int64())
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return nil
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})
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return *s
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}
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