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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package proxy | ||
|
|
||
| import ( | ||
| "encoding/binary" | ||
| "fmt" | ||
| "github.com/pkg/errors" | ||
| "github.com/sirupsen/logrus" | ||
| "io" | ||
| "net" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| type AuthClient struct { | ||
| conn net.Conn | ||
|
|
||
| magic uint64 | ||
| method string | ||
| timeout time.Duration | ||
| } | ||
|
|
||
| //TODO: reset deadlines after method - ok | ||
| func (b *AuthClient) sendAndReceiveAuth() error { | ||
| //TODO: retrieve from plugin (with timeout) | ||
| data := "my-test-jwt-token" | ||
|
|
||
| length := len(b.method) + 1 + len(data) | ||
| // 8 - bytes magic, 4 bytes length | ||
| buf := make([]byte, 12+length) | ||
| binary.BigEndian.PutUint64(buf[:8], b.magic) | ||
| binary.BigEndian.PutUint32(buf[8:], uint32(length)) | ||
| copy(buf[12:], []byte(b.method+"\x00"+data)) | ||
|
|
||
| err := b.conn.SetDeadline(time.Now().Add(b.timeout)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _, err = b.conn.Write(buf) | ||
| if err != nil { | ||
| return errors.Wrap(err, "Failed to write gateway handshake") | ||
| } | ||
|
|
||
| header := make([]byte, 4) | ||
| _, err = io.ReadFull(b.conn, header) | ||
| // If the credentials are valid, we would get a 4 byte response filled with null characters. | ||
| // Otherwise, the broker closes the connection and we get an EOF | ||
| if err != nil { | ||
| if err == io.EOF { | ||
| return errors.New("Gateway auth failed") | ||
| } | ||
| return errors.Wrap(err, "Failed to read response while gateway authenticating") | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| type AuthServer struct { | ||
| conn net.Conn | ||
|
|
||
| magic uint64 | ||
| method string | ||
| timeout time.Duration | ||
| } | ||
|
|
||
| //TODO: reset deadlines after method - ok | ||
| func (b *AuthServer) receiveAndSendAuth() error { | ||
| err := b.conn.SetDeadline(time.Now().Add(b.timeout)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| headerBuf := make([]byte, 12) // magic 8 + length 4 | ||
| _, err = io.ReadFull(b.conn, headerBuf) | ||
| if err != nil { | ||
| return errors.Wrap(err, "Failed to read gateway bytes magic") | ||
| } | ||
|
|
||
| magic := binary.BigEndian.Uint64(headerBuf[:8]) | ||
| if magic != b.magic { | ||
| return errors.Wrap(err, "gateway handshake magic bytes mismatch") | ||
| } | ||
|
|
||
| length := binary.BigEndian.Uint32(headerBuf[8:]) | ||
| payload := make([]byte, length-4) | ||
| _, err = io.ReadFull(b.conn, payload) | ||
| if err != nil { | ||
| return errors.Wrap(err, "Failed to read gateway handshake payload") | ||
| } | ||
| tokens := strings.Split(string(payload), "\x00") | ||
| if len(tokens) != 2 { | ||
| return fmt.Errorf("invalid gateway handshake: expected 2 tokens, got %d", len(tokens)) | ||
| } | ||
| if tokens[0] != b.method { | ||
| return errors.Wrap(err, fmt.Sprintf("gateway handshake method mismatch: expected %s , got %s", b.method, tokens[0])) | ||
| } | ||
| data := tokens[1] | ||
| // TODO: use data for authentication | ||
| _ = data | ||
|
|
||
| logrus.Infof("gateway handshake payload: %s", data) | ||
|
|
||
| header := make([]byte, 4) | ||
| if _, err := b.conn.Write(header); err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
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