a1feca39c2
crypto/keyring: `Keybase` interface gives way to its successor: `Keyring`. `LegacyKeybase` interface is added in order to guarantee limited backward compatibility with the old `Keybase` interface for the sole purpose of migrating keys across the new keyring backends. The package no longer depends on the `github.com/types.Config` singleton. `SupportedAlgos` and `SupportedLedgerAlgos` methods have been removed. The keyring just fails when trying to perform an action with an unsupported algorithm. crypto/ subdirs reorganization: `crypto/keys/hd` was moved to `crypto/hd`, which now groups together all HD wallets related types and utilities. client/input: * Removal of unnecessary `GetCheckPassword`, `PrintPrefixed` functions. * `GetConfirmation`'s signature changed to take in a io.Writer for better integration with `cobra.Command` types. client/context: * In-memory keyring is allocated in the context when `--gen-only` flag is passed in. `GetFromFields` does no longer silently allocate a keyring, it takes one as argument. Co-authored with @jgimeno Co-authored-by: Jonathan Gimeno <jgimeno@gmail.com>
77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
package keys
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import (
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"bufio"
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"crypto/sha256"
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"fmt"
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bip39 "github.com/cosmos/go-bip39"
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"github.com/spf13/cobra"
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"github.com/cosmos/cosmos-sdk/client/input"
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)
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const (
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flagUserEntropy = "unsafe-entropy"
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mnemonicEntropySize = 256
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)
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// MnemonicKeyCommand computes the bip39 memonic for input entropy.
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func MnemonicKeyCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "mnemonic",
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Short: "Compute the bip39 mnemonic for some input entropy",
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Long: "Create a bip39 mnemonic, sometimes called a seed phrase, by reading from the system entropy. To pass your own entropy, use --unsafe-entropy",
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RunE: runMnemonicCmd,
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}
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cmd.Flags().Bool(flagUserEntropy, false, "Prompt the user to supply their own entropy, instead of relying on the system")
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return cmd
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}
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func runMnemonicCmd(cmd *cobra.Command, args []string) error {
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flags := cmd.Flags()
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userEntropy, _ := flags.GetBool(flagUserEntropy)
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var entropySeed []byte
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if userEntropy {
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// prompt the user to enter some entropy
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buf := bufio.NewReader(cmd.InOrStdin())
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inputEntropy, err := input.GetString("> WARNING: Generate at least 256-bits of entropy and enter the results here:", buf)
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if err != nil {
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return err
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}
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if len(inputEntropy) < 43 {
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return fmt.Errorf("256-bits is 43 characters in Base-64, and 100 in Base-6. You entered %v, and probably want more", len(inputEntropy))
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}
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conf, err := input.GetConfirmation(fmt.Sprintf("> Input length: %d", len(inputEntropy)), buf, cmd.ErrOrStderr())
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if err != nil {
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return err
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}
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if !conf {
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return nil
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}
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// hash input entropy to get entropy seed
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hashedEntropy := sha256.Sum256([]byte(inputEntropy))
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entropySeed = hashedEntropy[:]
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} else {
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// read entropy seed straight from crypto.Rand
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var err error
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entropySeed, err = bip39.NewEntropy(mnemonicEntropySize)
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if err != nil {
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return err
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}
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}
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mnemonic, err := bip39.NewMnemonic(entropySeed)
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if err != nil {
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return err
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}
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cmd.Println(mnemonic)
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return nil
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}
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