/src/botan/src/lib/stream/stream_cipher.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Stream Ciphers |
3 | | * (C) 2015,2016 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/stream_cipher.h> |
9 | | #include <botan/internal/scan_name.h> |
10 | | #include <botan/exceptn.h> |
11 | | |
12 | | #if defined(BOTAN_HAS_CHACHA) |
13 | | #include <botan/internal/chacha.h> |
14 | | #endif |
15 | | |
16 | | #if defined(BOTAN_HAS_SALSA20) |
17 | | #include <botan/internal/salsa20.h> |
18 | | #endif |
19 | | |
20 | | #if defined(BOTAN_HAS_SHAKE_CIPHER) |
21 | | #include <botan/internal/shake_cipher.h> |
22 | | #endif |
23 | | |
24 | | #if defined(BOTAN_HAS_CTR_BE) |
25 | | #include <botan/internal/ctr.h> |
26 | | #endif |
27 | | |
28 | | #if defined(BOTAN_HAS_OFB) |
29 | | #include <botan/internal/ofb.h> |
30 | | #endif |
31 | | |
32 | | #if defined(BOTAN_HAS_RC4) |
33 | | #include <botan/internal/rc4.h> |
34 | | #endif |
35 | | |
36 | | namespace Botan { |
37 | | |
38 | | std::unique_ptr<StreamCipher> StreamCipher::create(const std::string& algo_spec, |
39 | | const std::string& provider) |
40 | 66 | { |
41 | 66 | const SCAN_Name req(algo_spec); |
42 | | |
43 | 66 | #if defined(BOTAN_HAS_CTR_BE) |
44 | 66 | if((req.algo_name() == "CTR-BE" || req.algo_name() == "CTR") && req.arg_count_between(1,2)) |
45 | 0 | { |
46 | 0 | if(provider.empty() || provider == "base") |
47 | 0 | { |
48 | 0 | auto cipher = BlockCipher::create(req.arg(0)); |
49 | 0 | if(cipher) |
50 | 0 | { |
51 | 0 | size_t ctr_size = req.arg_as_integer(1, cipher->block_size()); |
52 | 0 | return std::make_unique<CTR_BE>(std::move(cipher), ctr_size); |
53 | 0 | } |
54 | 0 | } |
55 | 0 | } |
56 | 66 | #endif |
57 | | |
58 | 66 | #if defined(BOTAN_HAS_CHACHA) |
59 | 66 | if(req.algo_name() == "ChaCha") |
60 | 66 | { |
61 | 66 | if(provider.empty() || provider == "base") |
62 | 66 | return std::make_unique<ChaCha>(req.arg_as_integer(0, 20)); |
63 | 66 | } |
64 | | |
65 | 0 | if(req.algo_name() == "ChaCha20") |
66 | 0 | { |
67 | 0 | if(provider.empty() || provider == "base") |
68 | 0 | return std::make_unique<ChaCha>(20); |
69 | 0 | } |
70 | 0 | #endif |
71 | | |
72 | 0 | #if defined(BOTAN_HAS_SALSA20) |
73 | 0 | if(req.algo_name() == "Salsa20") |
74 | 0 | { |
75 | 0 | if(provider.empty() || provider == "base") |
76 | 0 | return std::make_unique<Salsa20>(); |
77 | 0 | } |
78 | 0 | #endif |
79 | | |
80 | 0 | #if defined(BOTAN_HAS_SHAKE_CIPHER) |
81 | 0 | if(req.algo_name() == "SHAKE-128" || req.algo_name() == "SHAKE-128-XOF") |
82 | 0 | { |
83 | 0 | if(provider.empty() || provider == "base") |
84 | 0 | return std::make_unique<SHAKE_128_Cipher>(); |
85 | 0 | } |
86 | 0 | #endif |
87 | | |
88 | 0 | #if defined(BOTAN_HAS_OFB) |
89 | 0 | if(req.algo_name() == "OFB" && req.arg_count() == 1) |
90 | 0 | { |
91 | 0 | if(provider.empty() || provider == "base") |
92 | 0 | { |
93 | 0 | if(auto cipher = BlockCipher::create(req.arg(0))) |
94 | 0 | return std::make_unique<OFB>(std::move(cipher)); |
95 | 0 | } |
96 | 0 | } |
97 | 0 | #endif |
98 | | |
99 | 0 | #if defined(BOTAN_HAS_RC4) |
100 | | |
101 | 0 | if(req.algo_name() == "RC4" || |
102 | 0 | req.algo_name() == "ARC4" || |
103 | 0 | req.algo_name() == "MARK-4") |
104 | 0 | { |
105 | 0 | const size_t skip = (req.algo_name() == "MARK-4") ? 256 : req.arg_as_integer(0, 0); |
106 | |
|
107 | 0 | if(provider.empty() || provider == "base") |
108 | 0 | { |
109 | 0 | return std::make_unique<RC4>(skip); |
110 | 0 | } |
111 | 0 | } |
112 | | |
113 | 0 | #endif |
114 | | |
115 | 0 | BOTAN_UNUSED(req); |
116 | 0 | BOTAN_UNUSED(provider); |
117 | |
|
118 | 0 | return nullptr; |
119 | 0 | } |
120 | | |
121 | | //static |
122 | | std::unique_ptr<StreamCipher> |
123 | | StreamCipher::create_or_throw(const std::string& algo, |
124 | | const std::string& provider) |
125 | 7 | { |
126 | 7 | if(auto sc = StreamCipher::create(algo, provider)) |
127 | 7 | { |
128 | 7 | return sc; |
129 | 7 | } |
130 | 0 | throw Lookup_Error("Stream cipher", algo, provider); |
131 | 7 | } |
132 | | |
133 | | std::vector<std::string> StreamCipher::providers(const std::string& algo_spec) |
134 | 0 | { |
135 | 0 | return probe_providers_of<StreamCipher>(algo_spec); |
136 | 0 | } |
137 | | |
138 | | } |