/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 | | |
10 | | #include <botan/exceptn.h> |
11 | | #include <botan/internal/scan_name.h> |
12 | | |
13 | | #if defined(BOTAN_HAS_CHACHA) |
14 | | #include <botan/internal/chacha.h> |
15 | | #endif |
16 | | |
17 | | #if defined(BOTAN_HAS_SALSA20) |
18 | | #include <botan/internal/salsa20.h> |
19 | | #endif |
20 | | |
21 | | #if defined(BOTAN_HAS_SHAKE_CIPHER) |
22 | | #include <botan/internal/shake_cipher.h> |
23 | | #endif |
24 | | |
25 | | #if defined(BOTAN_HAS_CTR_BE) |
26 | | #include <botan/internal/ctr.h> |
27 | | #endif |
28 | | |
29 | | #if defined(BOTAN_HAS_OFB) |
30 | | #include <botan/internal/ofb.h> |
31 | | #endif |
32 | | |
33 | | #if defined(BOTAN_HAS_RC4) |
34 | | #include <botan/internal/rc4.h> |
35 | | #endif |
36 | | |
37 | | namespace Botan { |
38 | | |
39 | 1 | std::unique_ptr<StreamCipher> StreamCipher::create(std::string_view algo_spec, std::string_view provider) { |
40 | 1 | #if defined(BOTAN_HAS_SHAKE_CIPHER) |
41 | 1 | if(algo_spec == "SHAKE-128" || algo_spec == "SHAKE-128-XOF") { |
42 | 0 | if(provider.empty() || provider == "base") { |
43 | 0 | return std::make_unique<SHAKE_128_Cipher>(); |
44 | 0 | } |
45 | 0 | } |
46 | | |
47 | 1 | if(algo_spec == "SHAKE-256" || algo_spec == "SHAKE-256-XOF") { |
48 | 0 | if(provider.empty() || provider == "base") { |
49 | 0 | return std::make_unique<SHAKE_256_Cipher>(); |
50 | 0 | } |
51 | 0 | } |
52 | 1 | #endif |
53 | | |
54 | 1 | #if defined(BOTAN_HAS_CHACHA) |
55 | 1 | if(algo_spec == "ChaCha20") { |
56 | 0 | if(provider.empty() || provider == "base") { |
57 | 0 | return std::make_unique<ChaCha>(20); |
58 | 0 | } |
59 | 0 | } |
60 | 1 | #endif |
61 | | |
62 | 1 | #if defined(BOTAN_HAS_SALSA20) |
63 | 1 | if(algo_spec == "Salsa20") { |
64 | 0 | if(provider.empty() || provider == "base") { |
65 | 0 | return std::make_unique<Salsa20>(); |
66 | 0 | } |
67 | 0 | } |
68 | 1 | #endif |
69 | | |
70 | 1 | const SCAN_Name req(algo_spec); |
71 | | |
72 | 1 | #if defined(BOTAN_HAS_CTR_BE) |
73 | 1 | if((req.algo_name() == "CTR-BE" || req.algo_name() == "CTR") && req.arg_count_between(1, 2)) { |
74 | 0 | if(provider.empty() || provider == "base") { |
75 | 0 | auto cipher = BlockCipher::create(req.arg(0)); |
76 | 0 | if(cipher) { |
77 | 0 | size_t ctr_size = req.arg_as_integer(1, cipher->block_size()); |
78 | 0 | return std::make_unique<CTR_BE>(std::move(cipher), ctr_size); |
79 | 0 | } |
80 | 0 | } |
81 | 0 | } |
82 | 1 | #endif |
83 | | |
84 | 1 | #if defined(BOTAN_HAS_CHACHA) |
85 | 1 | if(req.algo_name() == "ChaCha") { |
86 | 1 | if(provider.empty() || provider == "base") { |
87 | 1 | return std::make_unique<ChaCha>(req.arg_as_integer(0, 20)); |
88 | 1 | } |
89 | 1 | } |
90 | 0 | #endif |
91 | | |
92 | 0 | #if defined(BOTAN_HAS_OFB) |
93 | 0 | if(req.algo_name() == "OFB" && req.arg_count() == 1) { |
94 | 0 | if(provider.empty() || provider == "base") { |
95 | 0 | if(auto cipher = BlockCipher::create(req.arg(0))) { |
96 | 0 | return std::make_unique<OFB>(std::move(cipher)); |
97 | 0 | } |
98 | 0 | } |
99 | 0 | } |
100 | 0 | #endif |
101 | | |
102 | 0 | #if defined(BOTAN_HAS_RC4) |
103 | | |
104 | 0 | if(req.algo_name() == "RC4" || req.algo_name() == "ARC4" || req.algo_name() == "MARK-4") { |
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 | return std::make_unique<RC4>(skip); |
109 | 0 | } |
110 | 0 | } |
111 | | |
112 | 0 | #endif |
113 | | |
114 | 0 | BOTAN_UNUSED(req); |
115 | 0 | BOTAN_UNUSED(provider); |
116 | |
|
117 | 0 | return nullptr; |
118 | 0 | } |
119 | | |
120 | | //static |
121 | 1 | std::unique_ptr<StreamCipher> StreamCipher::create_or_throw(std::string_view algo, std::string_view provider) { |
122 | 1 | if(auto sc = StreamCipher::create(algo, provider)) { |
123 | 1 | return sc; |
124 | 1 | } |
125 | 0 | throw Lookup_Error("Stream cipher", algo, provider); |
126 | 1 | } |
127 | | |
128 | 0 | std::vector<std::string> StreamCipher::providers(std::string_view algo_spec) { |
129 | 0 | return probe_providers_of<StreamCipher>(algo_spec); |
130 | 0 | } |
131 | | |
132 | 0 | size_t StreamCipher::default_iv_length() const { return 0; } |
133 | | |
134 | | } // namespace Botan |