-
Notifications
You must be signed in to change notification settings - Fork 12
/
version_task.go
194 lines (178 loc) · 5.93 KB
/
version_task.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
package dissectls
import (
"github.com/rs/zerolog/log"
"github.com/tumi8/goscanner/scanner/results"
"github.com/tumi8/goscanner/tls"
"strings"
)
var supportedVersions13 = []uint16{tls.VersionTLS13, tls.VersionTLS12, tls.VersionTLS11, tls.VersionTLS10}
type VersionTask struct {
isDone bool
modifiedVersion bool
lastVersion uint16
errorBehavior string
DetailedScan bool
}
func (c *VersionTask) SetCHValues(preset *tls.ClientHelloPreset, model *results.ServerModel, scanDoneRate float64, playSafe bool, chsLeft int) {
// Set to highest version the server supports, if not set to 1.3 by other tasks
var maxVersion uint16
if preset.Version < tls.VersionTLS13 {
// Use lowest version we know of, because we know only of the highest version or are rescanning on a lower version
// Not 1.3 per default
if model.VersionSSLv3 != nil && *model.VersionSSLv3 == "True" {
maxVersion = tls.VersionSSL30
} else if model.VersionTLS10 != nil && *model.VersionTLS10 == "True" {
maxVersion = tls.VersionTLS10
} else if model.VersionTLS11 != nil && *model.VersionTLS11 == "True" {
maxVersion = tls.VersionTLS11
} else if model.VersionTLS12 != nil && *model.VersionTLS12 == "True" {
maxVersion = tls.VersionTLS12
}
// If I do not know anything use highest versions
if maxVersion == 0 {
c.modifiedVersion = true
maxVersion = tls.VersionTLS12
if model.VersionTLS12 != nil && *model.VersionTLS12 != "True" {
maxVersion = tls.VersionTLS11
if model.VersionTLS11 != nil && *model.VersionTLS11 != "True" {
maxVersion = tls.VersionTLS10
if model.VersionTLS10 != nil && *model.VersionTLS10 != "True" {
maxVersion = tls.VersionTLS13
}
}
}
}
preset.Version = maxVersion
}
if !playSafe && !c.isDone {
scansLeft := 0
if model.VersionTLS12 == nil {
scansLeft++
}
if model.VersionTLS11 == nil {
scansLeft++
}
if model.VersionTLS10 == nil {
scansLeft++
}
if scansLeft > 0 && (model.CipherScanComplete || scansLeft >= chsLeft) {
c.modifiedVersion = true
c.DetailedScan = false
model.CipherScanComplete = true
preset.Ciphers = ScannerSupported12Ciphers
if model.VersionTLS12 == nil {
preset.Version = tls.VersionTLS12
} else if model.VersionTLS11 == nil {
preset.Version = tls.VersionTLS11
} else if model.VersionTLS10 == nil {
preset.Version = tls.VersionTLS10
}
}
}
c.lastVersion = preset.Version
if preset.Version == tls.VersionTLS13 {
// Configure 1.3
preset.Version = tls.VersionTLS12
preset.SupportedVersions = supportedVersions13
if len(preset.SupportedGroups) == 0 {
preset.SupportedGroups = ScannerSupportedGroups
preset.KeyShares = 1
}
}
}
func (c *VersionTask) Done(*results.ServerModel) bool {
return false
}
func (c *VersionTask) inferVersion(model *results.ServerModel, value string) (learnedSomething bool) {
if model.VersionTLS10 == nil && c.lastVersion == tls.VersionTLS10 {
model.VersionTLS10 = &value
learnedSomething = true
}
if model.VersionTLS11 == nil && c.lastVersion == tls.VersionTLS11 {
model.VersionTLS11 = &value
learnedSomething = true
}
if model.VersionTLS12 == nil && c.lastVersion == tls.VersionTLS12 {
model.VersionTLS12 = &value
learnedSomething = true
}
if model.VersionTLS13 == nil && c.lastVersion == tls.VersionTLS13 {
model.VersionTLS13 = &value
learnedSomething = true
}
if model.VersionSSLv3 == nil && c.lastVersion == tls.VersionSSL30 {
model.VersionSSLv3 = &value
learnedSomething = true
}
return
}
func (c *VersionTask) ResolveError(model *results.ServerModel) (learnedSomething bool) {
learnedSomething = c.inferVersion(model, "False")
if model.VersionTLS10 != nil && model.VersionTLS11 != nil && model.VersionTLS12 != nil && model.VersionTLS13 != nil {
c.isDone = true
}
if c.errorBehavior != "" {
if model.VersionError != nil && c.errorBehavior != *model.VersionError {
log.Debug().Str("ErrorBehavior", c.errorBehavior).Str("OldError", *model.VersionError).Msg("Contradicting Version Error Behaviors")
}
e := c.errorBehavior
model.VersionError = &e
}
return
}
func (c *VersionTask) MergeData(state tls.ConnectionState, model *results.ServerModel, preset *tls.ClientHelloPreset, err error) (errorCouldBeMe bool, learnedSomething bool) {
c.errorBehavior = ""
if c.isDone {
return
}
if state.ServerHello != nil {
v := "True"
switch state.ServerHello.Vers {
case tls.VersionTLS10:
learnedSomething = model.VersionTLS10 == nil
model.VersionTLS10 = &v
case tls.VersionTLS11:
learnedSomething = model.VersionTLS11 == nil
model.VersionTLS11 = &v
case tls.VersionSSL30:
learnedSomething = model.VersionSSLv3 == nil
model.VersionSSLv3 = &v
case tls.VersionTLS12:
if state.ServerHello.SupportedVersion == tls.VersionTLS13 {
learnedSomething = model.VersionTLS13 == nil
model.VersionTLS13 = &v
} else {
learnedSomething = model.VersionTLS12 == nil
model.VersionTLS12 = &v
}
}
learnedSomething = c.inferVersion(model, "Downgrade") || learnedSomething
if learnedSomething && c.DetailedScan {
model.ReEnableCipherScan = true
}
} else if c.modifiedVersion {
for _, e := range state.RecvAlerts {
if e == 40 || e == 70 || e == 80 {
errorCouldBeMe = true
c.errorBehavior = "Alert"
}
}
if strangeErrorHandlingPossible(err) {
c.errorBehavior = "TCP"
errorCouldBeMe = true
}
if len(state.SendAlerts) > 0 && (err == nil || (!strings.Contains(err.Error(), "unconfigured cipher") && !strings.Contains(err.Error(), "unconfigured cipher suite"))) {
errorCouldBeMe = true
}
if err != nil && strings.Contains(err.Error(), "first record does not look like a TLS handshake") {
c.errorBehavior = "No TLS"
learnedSomething = c.inferVersion(model, "No TLS") || learnedSomething
errorCouldBeMe = true
}
}
if model.VersionTLS10 != nil && model.VersionTLS11 != nil && model.VersionTLS12 != nil && model.VersionTLS13 != nil {
c.isDone = true
}
return
}
func (c *VersionTask) PostProcess(*results.ServerModel) {}