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package osxkeychain
/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework Security -framework Foundation
#include "osxkeychain_darwin.h"
#include <stdlib.h>
*/
import "C"
import (
"errors"
"net/url"
"strconv"
"strings"
"unsafe"
"github.com/docker/docker-credential-helpers/credentials"
)
// errCredentialsNotFound is the specific error message returned by OS X
// when the credentials are not in the keychain.
const errCredentialsNotFound = "The specified item could not be found in the keychain."
// Osxkeychain handles secrets using the OS X Keychain as store.
type Osxkeychain struct{}
// Add adds new credentials to the keychain.
func (h Osxkeychain) Add(creds *credentials.Credentials) error {
s, err := splitServer(creds.ServerURL)
if err != nil {
return err
}
defer freeServer(s)
username := C.CString(creds.Username)
defer C.free(unsafe.Pointer(username))
secret := C.CString(creds.Secret)
defer C.free(unsafe.Pointer(secret))
errMsg := C.keychain_add(s, username, secret)
if errMsg != nil {
defer C.free(unsafe.Pointer(errMsg))
return errors.New(C.GoString(errMsg))
}
return nil
}
// Delete removes credentials from the keychain.
func (h Osxkeychain) Delete(serverURL string) error {
s, err := splitServer(serverURL)
if err != nil {
return err
}
defer freeServer(s)
errMsg := C.keychain_delete(s)
if errMsg != nil {
defer C.free(unsafe.Pointer(errMsg))
return errors.New(C.GoString(errMsg))
}
return nil
}
// Get returns the username and secret to use for a given registry server URL.
func (h Osxkeychain) Get(serverURL string) (string, string, error) {
s, err := splitServer(serverURL)
if err != nil {
return "", "", err
}
defer freeServer(s)
var usernameLen C.uint
var username *C.char
var secretLen C.uint
var secret *C.char
defer C.free(unsafe.Pointer(username))
defer C.free(unsafe.Pointer(secret))
errMsg := C.keychain_get(s, &usernameLen, &username, &secretLen, &secret)
if errMsg != nil {
defer C.free(unsafe.Pointer(errMsg))
goMsg := C.GoString(errMsg)
if goMsg == errCredentialsNotFound {
return "", "", credentials.NewErrCredentialsNotFound()
}
return "", "", errors.New(goMsg)
}
user := C.GoStringN(username, C.int(usernameLen))
pass := C.GoStringN(secret, C.int(secretLen))
return user, pass, nil
}
func splitServer(serverURL string) (*C.struct_Server, error) {
u, err := url.Parse(serverURL)
if err != nil {
return nil, err
}
hostAndPort := strings.Split(u.Host, ":")
host := hostAndPort[0]
var port int
if len(hostAndPort) == 2 {
p, err := strconv.Atoi(hostAndPort[1])
if err != nil {
return nil, err
}
port = p
}
proto := C.kSecProtocolTypeHTTPS
if u.Scheme != "https" {
proto = C.kSecProtocolTypeHTTP
}
return &C.struct_Server{
proto: C.SecProtocolType(proto),
host: C.CString(host),
port: C.uint(port),
path: C.CString(u.Path),
}, nil
}
func freeServer(s *C.struct_Server) {
C.free(unsafe.Pointer(s.host))
C.free(unsafe.Pointer(s.path))
}
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