blob: a43607e1c107f9451540ceee74f63bec9bafba55 [file] [log] [blame]
Scott Baker2c1c4822019-10-16 11:02:41 -07001package sarama
2
3import (
4 "encoding/binary"
5 "encoding/hex"
khenaidoo26721882021-08-11 17:42:52 -04006
7 "github.com/jcmturner/gokrb5/v8/credentials"
8 "github.com/jcmturner/gokrb5/v8/gssapi"
9 "github.com/jcmturner/gokrb5/v8/iana/keyusage"
10 "github.com/jcmturner/gokrb5/v8/messages"
11 "github.com/jcmturner/gokrb5/v8/types"
Scott Baker2c1c4822019-10-16 11:02:41 -070012)
13
14type KafkaGSSAPIHandler struct {
15 client *MockKerberosClient
16 badResponse bool
17 badKeyChecksum bool
18}
19
20func (h *KafkaGSSAPIHandler) MockKafkaGSSAPI(buffer []byte) []byte {
21 // Default payload used for verify
22 err := h.client.Login() // Mock client construct keys when login
23 if err != nil {
24 return nil
25 }
26 if h.badResponse { // Returns trash
27 return []byte{0x00, 0x00, 0x00, 0x01, 0xAD}
28 }
29
khenaidoo26721882021-08-11 17:42:52 -040030 pack := gssapi.WrapToken{
Scott Baker2c1c4822019-10-16 11:02:41 -070031 Flags: KRB5_USER_AUTH,
32 EC: 12,
33 RRC: 0,
34 SndSeqNum: 3398292281,
35 Payload: []byte{0x11, 0x00}, // 1100
36 }
37 // Compute checksum
38 if h.badKeyChecksum {
39 pack.CheckSum = []byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}
40 } else {
41 err = pack.SetCheckSum(h.client.ASRep.DecryptedEncPart.Key, keyusage.GSSAPI_ACCEPTOR_SEAL)
42 if err != nil {
43 return nil
44 }
45 }
46
47 packBytes, err := pack.Marshal()
48 if err != nil {
49 return nil
50 }
51 lenBytes := len(packBytes)
52 response := make([]byte, lenBytes+4)
53 copy(response[4:], packBytes)
54 binary.BigEndian.PutUint32(response, uint32(lenBytes))
55 return response
56}
57
58type MockKerberosClient struct {
Scott Baker2c1c4822019-10-16 11:02:41 -070059 asRepBytes string
60 ASRep messages.ASRep
61 credentials *credentials.Credentials
62 mockError error
63 errorStage string
64}
65
66func (c *MockKerberosClient) Login() error {
67 if c.errorStage == "login" && c.mockError != nil {
68 return c.mockError
69 }
70 c.asRepBytes = "6b8202e9308202e5a003020105a10302010ba22b30293027a103020113a220041e301c301aa003020112a1131b114" +
71 "558414d504c452e434f4d636c69656e74a30d1b0b4558414d504c452e434f4da4133011a003020101a10a30081b06636c69656e7" +
72 "4a5820156618201523082014ea003020105a10d1b0b4558414d504c452e434f4da220301ea003020102a11730151b066b7262746" +
73 "7741b0b4558414d504c452e434f4da382011430820110a003020112a103020101a28201020481ffdb9891175d106818e61008c51" +
74 "d0b3462bca92f3bf9d4cfa82de4c4d7aff9994ec87c573e3a3d54dcb2bb79618c76f2bf4a3d006f90d5bdbd049bc18f48be39203" +
75 "549ca02acaf63f292b12404f9b74c34b83687119d8f56552ccc0c50ebee2a53bb114c1b4619bb1d5d31f0f49b4d40a08a9b4c046" +
76 "2e1398d0b648be1c0e50c552ad16e1d8d8e74263dd0bf0ec591e4797dfd40a9a1be4ae830d03a306e053fd7586fef84ffc5e4a83" +
77 "7c3122bf3e6a40fe87e84019f6283634461b955712b44a5f7386c278bff94ec2c2dc0403247e29c2450e853471ceababf9b8911f" +
78 "997f2e3010b046d2c49eb438afb0f4c210821e80d4ffa4c9521eb895dcd68610b3feaa682012c30820128a003020112a282011f0" +
79 "482011bce73cbce3f1dd17661c412005f0f2257c756fe8e98ff97e6ec24b7bab66e5fd3a3827aeeae4757af0c6e892948122d8b2" +
80 "03c8df48df0ef5d142d0e416d688f11daa0fcd63d96bdd431d02b8e951c664eeff286a2be62383d274a04016d5f0e141da58cb86" +
81 "331de64063062f4f885e8e9ce5b181ca2fdc67897c5995e0ae1ae0c171a64493ff7bd91bc6d89cd4fce1e2b3ea0a10e34b0d5eda" +
82 "aa38ee727b50c5632ed1d2f2b457908e616178d0d80b72af209fb8ac9dbaa1768fa45931392b36b6d8c12400f8ded2efaa0654d0" +
83 "da1db966e8b5aab4706c800f95d559664646041fdb38b411c62fc0fbe0d25083a28562b0e1c8df16e62e9d5626b0addee489835f" +
84 "eedb0f26c05baa596b69b17f47920aa64b29dc77cfcc97ba47885"
85 apRepBytes, err := hex.DecodeString(c.asRepBytes)
86 if err != nil {
87 return err
88 }
89 err = c.ASRep.Unmarshal(apRepBytes)
90 if err != nil {
91 return err
92 }
93 c.credentials = credentials.New("client", "EXAMPLE.COM").WithPassword("qwerty")
94 _, err = c.ASRep.DecryptEncPart(c.credentials)
95 if err != nil {
96 return err
97 }
98 return nil
99}
100
101func (c *MockKerberosClient) GetServiceTicket(spn string) (messages.Ticket, types.EncryptionKey, error) {
102 if c.errorStage == "service_ticket" && c.mockError != nil {
103 return messages.Ticket{}, types.EncryptionKey{}, c.mockError
104 }
105 return c.ASRep.Ticket, c.ASRep.DecryptedEncPart.Key, nil
106}
107
108func (c *MockKerberosClient) Domain() string {
109 return "EXAMPLE.COM"
110}
khenaidoo26721882021-08-11 17:42:52 -0400111
Scott Baker2c1c4822019-10-16 11:02:41 -0700112func (c *MockKerberosClient) CName() types.PrincipalName {
khenaidoo26721882021-08-11 17:42:52 -0400113 p := types.PrincipalName{
Scott Baker2c1c4822019-10-16 11:02:41 -0700114 NameType: KRB5_USER_AUTH,
115 NameString: []string{
116 "kafka",
117 "kafka",
118 },
119 }
120 return p
121}
khenaidoo26721882021-08-11 17:42:52 -0400122
Scott Baker2c1c4822019-10-16 11:02:41 -0700123func (c *MockKerberosClient) Destroy() {
124 // Do nothing.
125}