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
|
/*
* TLS Cipher Suites
* (C) 2004-2011,2012 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_TLS_CIPHER_SUITES_H_
#define BOTAN_TLS_CIPHER_SUITES_H_
#include <botan/types.h>
#include <botan/tls_algos.h>
#include <botan/tls_version.h>
#include <string>
#include <vector>
namespace Botan {
namespace TLS {
/**
* Ciphersuite Information
*/
class BOTAN_PUBLIC_API(2,0) Ciphersuite final
{
public:
/**
* Convert an SSL/TLS ciphersuite to algorithm fields
* @param suite the ciphersuite code number
* @return ciphersuite object
*/
static Ciphersuite by_id(uint16_t suite);
/**
* Convert an SSL/TLS ciphersuite name to algorithm fields
* @param name the IANA name for the desired ciphersuite
* @return ciphersuite object
*/
static Ciphersuite from_name(const std::string& name);
/**
* Returns true iff this suite is a known SCSV
*/
static bool is_scsv(uint16_t suite);
/**
* Generate a static list of all known ciphersuites and return it.
*
* @return list of all known ciphersuites
*/
static const std::vector<Ciphersuite>& all_known_ciphersuites();
/**
* Formats the ciphersuite back to an RFC-style ciphersuite string
* @return RFC ciphersuite string identifier
*/
std::string to_string() const { return m_iana_id; }
/**
* @return ciphersuite number
*/
uint16_t ciphersuite_code() const { return m_ciphersuite_code; }
/**
* @return true if this is a PSK ciphersuite
*/
bool psk_ciphersuite() const;
/**
* @return true if this is an ECC ciphersuite
*/
bool ecc_ciphersuite() const;
/**
* @return true if this suite uses a CBC cipher
*/
bool cbc_ciphersuite() const;
bool signature_used() const;
/**
* @return key exchange algorithm used by this ciphersuite
*/
std::string kex_algo() const { return kex_method_to_string(kex_method()); }
Kex_Algo kex_method() const { return m_kex_algo; }
/**
* @return signature algorithm used by this ciphersuite
*/
std::string sig_algo() const { return auth_method_to_string(auth_method()); }
Auth_Method auth_method() const { return m_auth_method; }
/**
* @return symmetric cipher algorithm used by this ciphersuite
*/
std::string cipher_algo() const { return m_cipher_algo; }
/**
* @return message authentication algorithm used by this ciphersuite
*/
std::string mac_algo() const { return m_mac_algo; }
std::string prf_algo() const
{
return kdf_algo_to_string(m_prf_algo);
}
/**
* @return cipher key length used by this ciphersuite
*/
size_t cipher_keylen() const { return m_cipher_keylen; }
size_t nonce_bytes_from_handshake() const;
Nonce_Format nonce_format() const { return m_nonce_format; }
size_t mac_keylen() const { return m_mac_keylen; }
/**
* @return true if this is a valid/known ciphersuite
*/
bool valid() const { return m_usable; }
bool usable_in_version(Protocol_Version version) const;
bool operator<(const Ciphersuite& o) const { return ciphersuite_code() < o.ciphersuite_code(); }
bool operator<(const uint16_t c) const { return ciphersuite_code() < c; }
Ciphersuite() = default;
private:
bool is_usable() const;
Ciphersuite(uint16_t ciphersuite_code,
const char* iana_id,
Auth_Method auth_method,
Kex_Algo kex_algo,
const char* cipher_algo,
size_t cipher_keylen,
const char* mac_algo,
size_t mac_keylen,
KDF_Algo prf_algo,
Nonce_Format nonce_format) :
m_ciphersuite_code(ciphersuite_code),
m_iana_id(iana_id),
m_auth_method(auth_method),
m_kex_algo(kex_algo),
m_prf_algo(prf_algo),
m_nonce_format(nonce_format),
m_cipher_algo(cipher_algo),
m_mac_algo(mac_algo),
m_cipher_keylen(cipher_keylen),
m_mac_keylen(mac_keylen)
{
m_usable = is_usable();
}
uint16_t m_ciphersuite_code = 0;
/*
All of these const char* strings are references to compile time
constants in tls_suite_info.cpp
*/
const char* m_iana_id = nullptr;
Auth_Method m_auth_method = Auth_Method::ANONYMOUS;
Kex_Algo m_kex_algo = Kex_Algo::STATIC_RSA;
KDF_Algo m_prf_algo = KDF_Algo::SHA_1;
Nonce_Format m_nonce_format = Nonce_Format::CBC_MODE;
const char* m_cipher_algo = nullptr;
const char* m_mac_algo = nullptr;
size_t m_cipher_keylen = 0;
size_t m_mac_keylen = 0;
bool m_usable = false;
};
}
}
#endif
|
