/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/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 | | #if defined(BOTAN_HAS_OPENSSL) |
37 | | #include <botan/internal/openssl.h> |
38 | | #endif |
39 | | |
40 | | namespace Botan { |
41 | | |
42 | | std::unique_ptr<StreamCipher> StreamCipher::create(const std::string& algo_spec, |
43 | | const std::string& provider) |
44 | 122 | { |
45 | 122 | const SCAN_Name req(algo_spec); |
46 | | |
47 | 122 | #if defined(BOTAN_HAS_CTR_BE) |
48 | 122 | if((req.algo_name() == "CTR-BE" || req.algo_name() == "CTR") && req.arg_count_between(1,2)) |
49 | 0 | { |
50 | 0 | if(provider.empty() || provider == "base") |
51 | 0 | { |
52 | 0 | auto cipher = BlockCipher::create(req.arg(0)); |
53 | 0 | if(cipher) |
54 | 0 | { |
55 | 0 | size_t ctr_size = req.arg_as_integer(1, cipher->block_size()); |
56 | 0 | return std::unique_ptr<StreamCipher>(new CTR_BE(cipher.release(), ctr_size)); |
57 | 0 | } |
58 | 122 | } |
59 | 0 | } |
60 | 122 | #endif |
61 | | |
62 | 122 | #if defined(BOTAN_HAS_CHACHA) |
63 | 122 | if(req.algo_name() == "ChaCha") |
64 | 122 | { |
65 | 122 | if(provider.empty() || provider == "base") |
66 | 122 | return std::unique_ptr<StreamCipher>(new ChaCha(req.arg_as_integer(0, 20))); |
67 | 0 | } |
68 | | |
69 | 0 | if(req.algo_name() == "ChaCha20") |
70 | 0 | { |
71 | 0 | if(provider.empty() || provider == "base") |
72 | 0 | return std::unique_ptr<StreamCipher>(new ChaCha(20)); |
73 | 0 | } |
74 | 0 | #endif |
75 | | |
76 | 0 | #if defined(BOTAN_HAS_SALSA20) |
77 | 0 | if(req.algo_name() == "Salsa20") |
78 | 0 | { |
79 | 0 | if(provider.empty() || provider == "base") |
80 | 0 | return std::unique_ptr<StreamCipher>(new Salsa20); |
81 | 0 | } |
82 | 0 | #endif |
83 | | |
84 | 0 | #if defined(BOTAN_HAS_SHAKE_CIPHER) |
85 | 0 | if(req.algo_name() == "SHAKE-128" || req.algo_name() == "SHAKE-128-XOF") |
86 | 0 | { |
87 | 0 | if(provider.empty() || provider == "base") |
88 | 0 | return std::unique_ptr<StreamCipher>(new SHAKE_128_Cipher); |
89 | 0 | } |
90 | 0 | #endif |
91 | | |
92 | 0 | #if defined(BOTAN_HAS_OFB) |
93 | 0 | if(req.algo_name() == "OFB" && req.arg_count() == 1) |
94 | 0 | { |
95 | 0 | if(provider.empty() || provider == "base") |
96 | 0 | { |
97 | 0 | if(auto c = BlockCipher::create(req.arg(0))) |
98 | 0 | return std::unique_ptr<StreamCipher>(new OFB(c.release())); |
99 | 0 | } |
100 | 0 | } |
101 | 0 | #endif |
102 | | |
103 | 0 | #if defined(BOTAN_HAS_RC4) |
104 | | |
105 | 0 | if(req.algo_name() == "RC4" || |
106 | 0 | req.algo_name() == "ARC4" || |
107 | 0 | req.algo_name() == "MARK-4") |
108 | 0 | { |
109 | 0 | const size_t skip = (req.algo_name() == "MARK-4") ? 256 : req.arg_as_integer(0, 0); |
110 | |
|
111 | | #if defined(BOTAN_HAS_OPENSSL) |
112 | | if(provider.empty() || provider == "openssl") |
113 | | { |
114 | | return std::unique_ptr<StreamCipher>(make_openssl_rc4(skip)); |
115 | | } |
116 | | #endif |
117 | |
|
118 | 0 | if(provider.empty() || provider == "base") |
119 | 0 | { |
120 | 0 | return std::unique_ptr<StreamCipher>(new RC4(skip)); |
121 | 0 | } |
122 | 0 | } |
123 | | |
124 | 0 | #endif |
125 | | |
126 | 0 | BOTAN_UNUSED(req); |
127 | 0 | BOTAN_UNUSED(provider); |
128 | |
|
129 | 0 | return nullptr; |
130 | 0 | } |
131 | | |
132 | | //static |
133 | | std::unique_ptr<StreamCipher> |
134 | | StreamCipher::create_or_throw(const std::string& algo, |
135 | | const std::string& provider) |
136 | 7 | { |
137 | 7 | if(auto sc = StreamCipher::create(algo, provider)) |
138 | 7 | { |
139 | 7 | return sc; |
140 | 7 | } |
141 | 0 | throw Lookup_Error("Stream cipher", algo, provider); |
142 | 0 | } |
143 | | |
144 | | std::vector<std::string> StreamCipher::providers(const std::string& algo_spec) |
145 | 0 | { |
146 | 0 | return probe_providers_of<StreamCipher>(algo_spec, {"base", "openssl"}); |
147 | 0 | } |
148 | | |
149 | | } |