54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
// Package ssh provides SSH key generation utilities.
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package ssh
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import (
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"crypto/ed25519"
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"crypto/rand"
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"encoding/pem"
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"fmt"
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"golang.org/x/crypto/ssh"
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)
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// KeyPair contains an SSH key pair.
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type KeyPair struct {
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PrivateKey string //nolint:gosec // field name describes SSH key material, not a hardcoded secret
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PublicKey string
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}
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// GenerateKeyPair generates a new Ed25519 SSH key pair.
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func GenerateKeyPair() (*KeyPair, error) {
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// Generate Ed25519 key pair
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publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
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if err != nil {
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return nil, fmt.Errorf("failed to generate key pair: %w", err)
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}
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// Convert private key to PEM format
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privateKeyPEM, err := ssh.MarshalPrivateKey(privateKey, "")
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if err != nil {
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return nil, fmt.Errorf("failed to marshal private key: %w", err)
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}
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// Convert public key to authorized_keys format
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sshPublicKey, err := ssh.NewPublicKey(publicKey)
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if err != nil {
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return nil, fmt.Errorf("failed to create SSH public key: %w", err)
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}
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return &KeyPair{
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PrivateKey: string(pem.EncodeToMemory(privateKeyPEM)),
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PublicKey: string(ssh.MarshalAuthorizedKey(sshPublicKey)),
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}, nil
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}
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// ValidatePrivateKey validates that a private key is valid.
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func ValidatePrivateKey(privateKeyPEM string) error {
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_, err := ssh.ParsePrivateKey([]byte(privateKeyPEM))
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if err != nil {
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return fmt.Errorf("invalid private key: %w", err)
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}
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return nil
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}
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