43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
/*
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SSHSecure - a program to harden OpenSSH from defaults
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Copyright (C) 2020 Brent Saner
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package sshkeys
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import (
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"crypto/ed25519"
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)
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func (k *SSHPrivKey) generateEd25519() error {
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if k.Key != nil || k.PublicKey.Key != nil {
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return nil // Just no-op; already generated.
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}
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// We cast "pk" (public key) to _ because it's an interface{} that we can't seem to
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// assert to []byte. I've tried iterating, a type assertion, initializing,... nada.
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// Luckily it's at a fixed half of the secret key.
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if _, s, err := ed25519.GenerateKey(nil); err != nil {
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return err
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} else {
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k.Key = s
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ks := len(s) - ed25519.PublicKeySize
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k.PublicKey.Key = s[ks:]
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k.BitSize = ed25519Len
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k.PublicKey.KeyType = KeyEd25519
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}
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return nil
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}
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