Botan 2.19.2
Crypto and TLS for C&
algo_filt.cpp
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1/*
2* Filters
3* (C) 1999-2007,2015 Jack Lloyd
4*
5* Botan is released under the Simplified BSD License (see license.txt)
6*/
7
8#include <botan/filters.h>
9#include <algorithm>
10
11namespace Botan {
12
13#if defined(BOTAN_HAS_STREAM_CIPHER)
14
15StreamCipher_Filter::StreamCipher_Filter(StreamCipher* cipher) :
16 m_buffer(BOTAN_DEFAULT_BUFFER_SIZE),
17 m_cipher(cipher)
18 {
19 }
20
21StreamCipher_Filter::StreamCipher_Filter(StreamCipher* cipher, const SymmetricKey& key) :
22 StreamCipher_Filter(cipher)
23 {
24 m_cipher->set_key(key);
25 }
26
27StreamCipher_Filter::StreamCipher_Filter(const std::string& sc_name) :
28 m_buffer(BOTAN_DEFAULT_BUFFER_SIZE),
29 m_cipher(StreamCipher::create_or_throw(sc_name))
30 {
31 }
32
33StreamCipher_Filter::StreamCipher_Filter(const std::string& sc_name, const SymmetricKey& key) :
34 StreamCipher_Filter(sc_name)
35 {
36 m_cipher->set_key(key);
37 }
38
39void StreamCipher_Filter::write(const uint8_t input[], size_t length)
40 {
41 while(length)
42 {
43 size_t copied = std::min<size_t>(length, m_buffer.size());
44 m_cipher->cipher(input, m_buffer.data(), copied);
45 send(m_buffer, copied);
46 input += copied;
47 length -= copied;
48 }
49 }
50
51#endif
52
53#if defined(BOTAN_HAS_HASH)
54
55Hash_Filter::Hash_Filter(const std::string& hash_name, size_t len) :
56 m_hash(HashFunction::create_or_throw(hash_name)),
57 m_out_len(len)
58 {
59 }
60
61void Hash_Filter::end_msg()
62 {
63 secure_vector<uint8_t> output = m_hash->final();
64 if(m_out_len)
65 send(output, std::min<size_t>(m_out_len, output.size()));
66 else
67 send(output);
68 }
69#endif
70
71#if defined(BOTAN_HAS_MAC)
72
73MAC_Filter::MAC_Filter(const std::string& mac_name, size_t len) :
74 m_mac(MessageAuthenticationCode::create_or_throw(mac_name)),
75 m_out_len(len)
76 {
77 }
78
79MAC_Filter::MAC_Filter(const std::string& mac_name, const SymmetricKey& key, size_t len) :
80 MAC_Filter(mac_name, len)
81 {
82 m_mac->set_key(key);
83 }
84
85void MAC_Filter::end_msg()
86 {
87 secure_vector<uint8_t> output = m_mac->final();
88 if(m_out_len)
89 send(output, std::min<size_t>(m_out_len, output.size()));
90 else
91 send(output);
92 }
93
94#endif
95
96}
Definition: alg_id.cpp:13
OctetString SymmetricKey
Definition: symkey.h:141