42 lines
1.2 KiB
Go
42 lines
1.2 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/rand"
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"crypto/rsa"
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)
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func (k *SSHPrivKey) generateRsa() error {
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if k.BitSize == 0 {
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k.BitSize = defRSABitSize
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}
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if k.Key != nil || k.PublicKey.Key != nil {
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return nil // A no-op; key already exists.
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}
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if sk, err := rsa.GenerateKey(rand.Reader, int(k.BitSize)); err != nil {
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return err
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} else {
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k.Key = sk // See https://golang.org/pkg/crypto/rsa/#PrivateKey
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k.PublicKey.KeyType = KeyRsa
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k.PublicKey.Key = sk.PublicKey
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}
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return nil
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}
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