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
|
/*
* Certificate Request Message
* (C) 2004-2006,2012 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#include <botan/internal/tls_messages.h>
#include <botan/internal/tls_reader.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/loadstor.h>
#include <botan/secqueue.h>
namespace Botan {
/**
* Create a new Certificate Request message
*/
Certificate_Req::Certificate_Req(Record_Writer& writer,
TLS_Handshake_Hash& hash,
const std::vector<X509_Certificate>& ca_certs,
const std::vector<Certificate_Type>& cert_types)
{
for(size_t i = 0; i != ca_certs.size(); ++i)
names.push_back(ca_certs[i].subject_dn());
if(cert_types.empty()) // default is RSA/DSA is OK
{
types.push_back(RSA_CERT);
types.push_back(DSS_CERT);
}
else
types = cert_types;
send(writer, hash);
}
/**
* Serialize a Certificate Request message
*/
MemoryVector<byte> Certificate_Req::serialize() const
{
MemoryVector<byte> buf;
append_tls_length_value(buf, types, 1);
DER_Encoder encoder;
for(size_t i = 0; i != names.size(); ++i)
encoder.encode(names[i]);
// is this correct?
append_tls_length_value(buf, encoder.get_contents(), 2);
return buf;
}
/**
* Deserialize a Certificate Request message
*/
void Certificate_Req::deserialize(const MemoryRegion<byte>& buf)
{
if(buf.size() < 4)
throw Decoding_Error("Certificate_Req: Bad certificate request");
const size_t types_size = buf[0];
if(buf.size() < types_size + 3)
throw Decoding_Error("Certificate_Req: Bad certificate request");
for(size_t i = 0; i != types_size; ++i)
types.push_back(static_cast<Certificate_Type>(buf[i+1]));
const size_t names_size = make_u16bit(buf[types_size+1], buf[types_size+2]);
if(buf.size() != names_size + types_size + 3)
throw Decoding_Error("Certificate_Req: Bad certificate request");
size_t offset = types_size + 3;
while(offset < buf.size())
{
const size_t name_size = make_u16bit(buf[offset], buf[offset+1]);
if(offset + 2 + name_size > buf.size())
throw Decoding_Error("Certificate_Req: Bad certificate request");
BER_Decoder decoder(&buf[offset + 2], name_size);
X509_DN name;
decoder.decode(name);
names.push_back(name);
offset += (2 + name_size);
}
}
/**
* Create a new Certificate message
*/
Certificate::Certificate(Record_Writer& writer,
TLS_Handshake_Hash& hash,
const std::vector<X509_Certificate>& cert_list)
{
certs = cert_list;
send(writer, hash);
}
/**
* Serialize a Certificate message
*/
MemoryVector<byte> Certificate::serialize() const
{
MemoryVector<byte> buf(3);
for(size_t i = 0; i != certs.size(); ++i)
{
MemoryVector<byte> raw_cert = certs[i].BER_encode();
const size_t cert_size = raw_cert.size();
for(size_t i = 0; i != 3; ++i)
buf.push_back(get_byte<u32bit>(i+1, cert_size));
buf += raw_cert;
}
const size_t buf_size = buf.size() - 3;
for(size_t i = 0; i != 3; ++i)
buf[i] = get_byte<u32bit>(i+1, buf_size);
return buf;
}
/**
* Deserialize a Certificate message
*/
void Certificate::deserialize(const MemoryRegion<byte>& buf)
{
if(buf.size() < 3)
throw Decoding_Error("Certificate: Message malformed");
const size_t total_size = make_u32bit(0, buf[0], buf[1], buf[2]);
SecureQueue queue;
queue.write(&buf[3], buf.size() - 3);
if(queue.size() != total_size)
throw Decoding_Error("Certificate: Message malformed");
while(queue.size())
{
if(queue.size() < 3)
throw Decoding_Error("Certificate: Message malformed");
byte len[3];
queue.read(len, 3);
const size_t cert_size = make_u32bit(0, len[0], len[1], len[2]);
const size_t original_size = queue.size();
X509_Certificate cert(queue);
if(queue.size() + cert_size != original_size)
throw Decoding_Error("Certificate: Message malformed");
certs.push_back(cert);
}
}
}
|
