59aadf42aa
Merges the keybase and Ledger code from go-crypto (which is no more) into the SDK Adds support for Ledger into gaiacli Cherry-picks updated error handling from #1158
61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package bip39
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import (
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"strings"
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"github.com/bartekn/go-bip39"
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)
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// ValidSentenceLen defines the mnemonic sentence lengths supported by this BIP 39 library.
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type ValidSentenceLen uint8
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const (
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// FundRaiser is the sentence length used during the cosmos fundraiser (12 words).
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FundRaiser ValidSentenceLen = 12
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// FreshKey is the sentence length used for newly created keys (24 words).
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FreshKey ValidSentenceLen = 24
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)
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// NewMnemonic will return a string consisting of the mnemonic words for
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// the given sentence length.
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func NewMnemonic(len ValidSentenceLen) (words []string, err error) {
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// len = (entropySize + checksum) / 11
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var entropySize int
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switch len {
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case FundRaiser:
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entropySize = 128
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case FreshKey:
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entropySize = 256
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}
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var entropy []byte
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entropy, err = bip39.NewEntropy(entropySize)
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if err != nil {
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return
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}
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var mnemonic string
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mnemonic, err = bip39.NewMnemonic(entropy)
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if err != nil {
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return
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}
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words = strings.Split(mnemonic, " ")
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return
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}
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// MnemonicToSeed creates a BIP 39 seed from the passed mnemonic (with an empty BIP 39 password).
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// This method does not validate the mnemonics checksum.
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func MnemonicToSeed(mne string) (seed []byte) {
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// we do not checksum here...
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seed = bip39.NewSeed(mne, "")
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return
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}
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// MnemonicToSeedWithErrChecking returns the same seed as MnemonicToSeed.
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// It creates a BIP 39 seed from the passed mnemonic (with an empty BIP 39 password).
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//
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// Different from MnemonicToSeed it validates the checksum.
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// For details on the checksum see the BIP 39 spec.
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func MnemonicToSeedWithErrChecking(mne string) (seed []byte, err error) {
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seed, err = bip39.NewSeedWithErrorChecking(mne, "")
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return
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}
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