60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
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package dtl
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"fmt"
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"time"
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"golang.org/x/crypto/ssh"
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)
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const (
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KeySize = 2048
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)
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type OpenSshKeyPair struct {
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privateKey *rsa.PrivateKey
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publicKey ssh.PublicKey
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}
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func NewOpenSshKeyPair() (*OpenSshKeyPair, error) {
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return NewOpenSshKeyPairWithSize(KeySize)
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}
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func NewOpenSshKeyPairWithSize(keySize int) (*OpenSshKeyPair, error) {
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privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
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if err != nil {
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return nil, err
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}
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publicKey, err := ssh.NewPublicKey(&privateKey.PublicKey)
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if err != nil {
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return nil, err
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}
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return &OpenSshKeyPair{
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privateKey: privateKey,
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publicKey: publicKey,
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}, nil
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}
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func (s *OpenSshKeyPair) AuthorizedKey() string {
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return fmt.Sprintf("%s %s packer Azure Deployment%s",
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s.publicKey.Type(),
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base64.StdEncoding.EncodeToString(s.publicKey.Marshal()),
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time.Now().Format(time.RFC3339))
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}
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func (s *OpenSshKeyPair) PrivateKey() []byte {
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privateKey := pem.EncodeToMemory(&pem.Block{
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Type: "RSA PRIVATE KEY",
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Bytes: x509.MarshalPKCS1PrivateKey(s.privateKey),
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})
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return privateKey
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}
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