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
|
/*
* Pipe Output Buffer
* (C) 1999-2007,2011 Jack Lloyd
* 2012 Markus Wanner
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/internal/out_buf.h>
#include <botan/secqueue.h>
namespace Botan {
/*
* Read data from a message
*/
size_t Output_Buffers::read(uint8_t output[], size_t length,
Pipe::message_id msg)
{
SecureQueue* q = get(msg);
if(q)
return q->read(output, length);
return 0;
}
/*
* Peek at data in a message
*/
size_t Output_Buffers::peek(uint8_t output[], size_t length,
size_t stream_offset,
Pipe::message_id msg) const
{
SecureQueue* q = get(msg);
if(q)
return q->peek(output, length, stream_offset);
return 0;
}
/*
* Check available bytes in a message
*/
size_t Output_Buffers::remaining(Pipe::message_id msg) const
{
SecureQueue* q = get(msg);
if(q)
return q->size();
return 0;
}
/*
* Return the total bytes of a message that have already been read.
*/
size_t Output_Buffers::get_bytes_read(Pipe::message_id msg) const
{
SecureQueue* q = get(msg);
if (q)
return q->get_bytes_read();
return 0;
}
/*
* Add a new output queue
*/
void Output_Buffers::add(SecureQueue* queue)
{
BOTAN_ASSERT(queue, "queue was provided");
BOTAN_ASSERT(m_buffers.size() < m_buffers.max_size(),
"Room was available in container");
m_buffers.push_back(std::unique_ptr<SecureQueue>(queue));
}
/*
* Retire old output queues
*/
void Output_Buffers::retire()
{
for(size_t i = 0; i != m_buffers.size(); ++i)
if(m_buffers[i] && m_buffers[i]->size() == 0)
{
m_buffers[i].reset();
}
while(m_buffers.size() && !m_buffers[0])
{
m_buffers.pop_front();
m_offset = m_offset + Pipe::message_id(1);
}
}
/*
* Get a particular output queue
*/
SecureQueue* Output_Buffers::get(Pipe::message_id msg) const
{
if(msg < m_offset)
return nullptr;
BOTAN_ASSERT(msg < message_count(), "Message number is in range");
return m_buffers[msg-m_offset].get();
}
/*
* Return the total number of messages
*/
Pipe::message_id Output_Buffers::message_count() const
{
return (m_offset + m_buffers.size());
}
/*
* Output_Buffers Constructor
*/
Output_Buffers::Output_Buffers()
{
m_offset = 0;
}
}
|
