Revision e47c43fdd9500e5e42912fa0afcb64934adb625e authored by Sam Kleinman on 30 July 2021, 13:29:00 UTC, committed by GitHub on 30 July 2021, 13:29:00 UTC
random.go
package crypto
import (
crand "crypto/rand"
"encoding/hex"
"io"
)
// This only uses the OS's randomness
func randBytes(numBytes int) []byte {
b := make([]byte, numBytes)
_, err := crand.Read(b)
if err != nil {
panic(err)
}
return b
}
// This only uses the OS's randomness
func CRandBytes(numBytes int) []byte {
return randBytes(numBytes)
}
// CRandHex returns a hex encoded string that's floor(numDigits/2) * 2 long.
//
// Note: CRandHex(24) gives 96 bits of randomness that
// are usually strong enough for most purposes.
func CRandHex(numDigits int) string {
return hex.EncodeToString(CRandBytes(numDigits / 2))
}
// Returns a crand.Reader.
func CReader() io.Reader {
return crand.Reader
}
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