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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* (C) 2014,2015,2019 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_CLI_TLS_HELPERS_H_
#define BOTAN_CLI_TLS_HELPERS_H_
#include <botan/pkcs8.h>
#include <botan/credentials_manager.h>
#include <botan/tls_policy.h>
#include <botan/x509self.h>
#include <botan/data_src.h>
#include <memory>
#include <fstream>
#include "cli_exceptions.h"
#if defined(BOTAN_HAS_CERTSTOR_SYSTEM)
#include <botan/certstor_system.h>
#endif
inline bool value_exists(const std::vector<std::string>& vec,
const std::string& val)
{
for(size_t i = 0; i != vec.size(); ++i)
{
if(vec[i] == val)
{
return true;
}
}
return false;
}
class Basic_Credentials_Manager : public Botan::Credentials_Manager
{
public:
Basic_Credentials_Manager(bool use_system_store,
const std::string& ca_path)
{
if(ca_path.empty() == false)
{
m_certstores.push_back(std::make_shared<Botan::Certificate_Store_In_Memory>(ca_path));
}
#if defined(BOTAN_HAS_CERTSTOR_SYSTEM)
if(use_system_store)
{
m_certstores.push_back(std::make_shared<Botan::System_Certificate_Store>());
}
#else
BOTAN_UNUSED(use_system_store);
#endif
}
Basic_Credentials_Manager(Botan::RandomNumberGenerator& rng,
const std::string& server_crt,
const std::string& server_key)
{
Certificate_Info cert;
cert.key.reset(Botan::PKCS8::load_key(server_key, rng));
Botan::DataSource_Stream in(server_crt);
while(!in.end_of_data())
{
try
{
cert.certs.push_back(Botan::X509_Certificate(in));
}
catch(std::exception&)
{
}
}
// TODO: attempt to validate chain ourselves
m_creds.push_back(cert);
}
std::vector<Botan::Certificate_Store*>
trusted_certificate_authorities(const std::string& type,
const std::string& /*hostname*/) override
{
std::vector<Botan::Certificate_Store*> v;
// don't ask for client certs
if(type == "tls-server")
{
return v;
}
for(auto const& cs : m_certstores)
{
v.push_back(cs.get());
}
return v;
}
std::vector<Botan::X509_Certificate> cert_chain(
const std::vector<std::string>& algos,
const std::string& type,
const std::string& hostname) override
{
BOTAN_UNUSED(type);
for(auto const& i : m_creds)
{
if(std::find(algos.begin(), algos.end(), i.key->algo_name()) == algos.end())
{
continue;
}
if(hostname != "" && !i.certs[0].matches_dns_name(hostname))
{
continue;
}
return i.certs;
}
return std::vector<Botan::X509_Certificate>();
}
Botan::Private_Key* private_key_for(const Botan::X509_Certificate& cert,
const std::string& /*type*/,
const std::string& /*context*/) override
{
for(auto const& i : m_creds)
{
if(cert == i.certs[0])
{
return i.key.get();
}
}
return nullptr;
}
private:
struct Certificate_Info
{
std::vector<Botan::X509_Certificate> certs;
std::shared_ptr<Botan::Private_Key> key;
};
std::vector<Certificate_Info> m_creds;
std::vector<std::shared_ptr<Botan::Certificate_Store>> m_certstores;
};
class TLS_All_Policy final : public Botan::TLS::Policy
{
public:
std::vector<std::string> allowed_ciphers() const override
{
return std::vector<std::string>
{
"ChaCha20Poly1305",
"AES-256/OCB(12)",
"AES-128/OCB(12)",
"AES-256/GCM",
"AES-128/GCM",
"AES-256/CCM",
"AES-128/CCM",
"AES-256/CCM(8)",
"AES-128/CCM(8)",
"Camellia-256/GCM",
"Camellia-128/GCM",
"ARIA-256/GCM",
"ARIA-128/GCM",
"AES-256",
"AES-128",
"Camellia-256",
"Camellia-128",
"SEED"
"3DES"
};
}
std::vector<std::string> allowed_key_exchange_methods() const override
{
return { "SRP_SHA", "ECDHE_PSK", "DHE_PSK", "PSK", "CECPQ1", "ECDH", "DH", "RSA" };
}
std::vector<std::string> allowed_signature_methods() const override
{
return { "ECDSA", "RSA", "DSA", "IMPLICIT" };
}
bool allow_tls10() const override { return true; }
bool allow_tls11() const override { return true; }
bool allow_tls12() const override { return true; }
};
inline std::unique_ptr<Botan::TLS::Policy> load_tls_policy(const std::string policy_type)
{
std::unique_ptr<Botan::TLS::Policy> policy;
if(policy_type == "default" || policy_type == "")
{
policy.reset(new Botan::TLS::Policy);
}
else if(policy_type == "suiteb_128")
{
policy.reset(new Botan::TLS::NSA_Suite_B_128);
}
else if(policy_type == "suiteb_192" || policy_type == "suiteb")
{
policy.reset(new Botan::TLS::NSA_Suite_B_192);
}
else if(policy_type == "strict")
{
policy.reset(new Botan::TLS::Strict_Policy);
}
else if(policy_type == "bsi")
{
policy.reset(new Botan::TLS::BSI_TR_02102_2);
}
else if(policy_type == "datagram")
{
policy.reset(new Botan::TLS::Strict_Policy);
}
else if(policy_type == "all" || policy_type == "everything")
{
policy.reset(new TLS_All_Policy);
}
else
{
// assume it's a file
std::ifstream policy_stream(policy_type);
if(!policy_stream.good())
{
throw Botan_CLI::CLI_Usage_Error("Unknown TLS policy: not a file or known short name");
}
policy.reset(new Botan::TLS::Text_Policy(policy_stream));
}
return policy;
}
#endif
|
