diff options
| -rw-r--r-- | client/keys.go | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/client/keys.go b/client/keys.go index 4acfbb9..866b062 100644 --- a/client/keys.go +++ b/client/keys.go @@ -10,14 +10,17 @@ import ( "golang.org/x/crypto/ssh" ) -const ( - rsaKey = "rsa" - ecdsaKey = "ecdsa" -) - type key interface{} +type keyfunc func(int) (key, ssh.PublicKey, error) + +var ( + keytypes = map[string]keyfunc{ + "rsa": generateRSAKey, + "ecdsa": generateECDSAKey, + } +) -func generateRSAKey(bits int) (*rsa.PrivateKey, ssh.PublicKey, error) { +func generateRSAKey(bits int) (key, ssh.PublicKey, error) { k, err := rsa.GenerateKey(rand.Reader, bits) if err != nil { return nil, nil, err @@ -29,7 +32,7 @@ func generateRSAKey(bits int) (*rsa.PrivateKey, ssh.PublicKey, error) { return k, pub, nil } -func generateECDSAKey(bits int) (*ecdsa.PrivateKey, ssh.PublicKey, error) { +func generateECDSAKey(bits int) (key, ssh.PublicKey, error) { var curve elliptic.Curve switch bits { case 256: @@ -53,12 +56,13 @@ func generateECDSAKey(bits int) (*ecdsa.PrivateKey, ssh.PublicKey, error) { } func generateKey(keytype string, bits int) (key, ssh.PublicKey, error) { - switch keytype { - case rsaKey: - return generateRSAKey(bits) - case ecdsaKey: - return generateECDSAKey(bits) - default: - return nil, nil, fmt.Errorf("Unsupported key type %s. Valid choices are [%s, %s]", keytype, rsaKey, ecdsaKey) + f, ok := keytypes[keytype] + if !ok { + var valid []string + for k, _ := range keytypes { + valid = append(valid, k) + } + return nil, nil, fmt.Errorf("Unsupported key type %s. Valid choices are %s", keytype, valid) } + return f(bits) } |