/
passphrase.go
56 lines (36 loc) · 13.9 KB
/
passphrase.go
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package crypto
import (
"crypto/rand"
"encoding/base64"
"encoding/binary"
"io"
"strings"
)
// Passphrase generates a human readable passphrase that is eventually used to encrypt the secret with age
func Passphrase() string {
var words []string
for i := 0; i < 10; i++ {
words = append(words, randomWord())
}
return strings.Join(words, "-")
}
// Token generates a nonce that is used to temporary protect the server from other processes that might trigger the serving of the secret
func Token() string {
const length = 16
buf := make([]byte, length)
_, err := io.ReadFull(rand.Reader, buf)
if err != nil {
panic(err)
}
return base64.RawURLEncoding.EncodeToString(buf)
}
// randomWord (and it's wordlist) a verbatim copies of the matching age implementation at https://github.com/FiloSottile/age/blob/36ae5671cfbb88c591c87a900b2c9a12999ea3b7/cmd/age/wordlist.go#L15
func randomWord() string {
buf := make([]byte, 2)
if _, err := rand.Read(buf); err != nil {
panic(err)
}
n := binary.BigEndian.Uint16(buf)
return wordlist[int(n)%2048]
}
var wordlist = strings.Split(`abandon ability able about above absent absorb abstract absurd abuse access accident account accuse achieve acid acoustic acquire across act action actor actress actual adapt add addict address adjust admit adult advance advice aerobic affair afford afraid again age agent agree ahead aim air airport aisle alarm album alcohol alert alien all alley allow almost alone alpha already also alter always amateur amazing among amount amused analyst anchor ancient anger angle angry animal ankle announce annual another answer antenna antique anxiety any apart apology appear apple approve april arch arctic area arena argue arm armed armor army around arrange arrest arrive arrow art artefact artist artwork ask aspect assault asset assist assume asthma athlete atom attack attend attitude attract auction audit august aunt author auto autumn average avocado avoid awake aware away awesome awful awkward axis baby bachelor bacon badge bag balance balcony ball bamboo banana 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