21768358452

Committed 06 Feb 2026 10:35PM UTC coverage: 90.064% (-0.003%) from 90.067%

Build # 21768358452

Build Type

Pull #5289

github

Committed by

web-flow

Commit Message

Merge f589db195 into 8ea0ca252

Pull Request Pull Request #5289: Further misc header reductions, forward declarations, etc

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102238 of 113517 relevant lines covered (90.06%)

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97.1

/src/lib/modes/cipher_mode.cpp

/*
* Cipher Modes
* (C) 2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/cipher_mode.h>

#include <botan/exceptn.h>
#include <botan/internal/parsing.h>
#include <botan/internal/scan_name.h>
#include <botan/internal/stream_mode.h>
#include <memory>
#include <sstream>
#include <utility>

#if defined(BOTAN_HAS_BLOCK_CIPHER)
   #include <botan/block_cipher.h>
#endif

#if defined(BOTAN_HAS_AEAD_MODES)
   #include <botan/aead.h>
#endif

#if defined(BOTAN_HAS_MODE_CBC)
   #include <botan/internal/cbc.h>
#endif

#if defined(BOTAN_HAS_MODE_CFB)
   #include <botan/internal/cfb.h>
#endif

#if defined(BOTAN_HAS_MODE_XTS)
   #include <botan/internal/xts.h>
#endif

#if defined(BOTAN_HAS_COMMONCRYPTO)
   #include <botan/internal/commoncrypto.h>
#endif

namespace Botan {

std::unique_ptr<Cipher_Mode> Cipher_Mode::create_or_throw(std::string_view algo,
                                                          Cipher_Dir direction,
                                                          std::string_view provider) {
   if(auto mode = Cipher_Mode::create(algo, direction, provider)) {
      return mode;
   }

   throw Lookup_Error("Cipher mode", algo, provider);
}

std::unique_ptr<Cipher_Mode> Cipher_Mode::create(std::string_view algo,
                                                 Cipher_Dir direction,
                                                 std::string_view provider) {
#if defined(BOTAN_HAS_COMMONCRYPTO)
   if(provider.empty() || provider == "commoncrypto") {
      if(auto cm = make_commoncrypto_cipher_mode(algo, direction))
         return cm;

      if(!provider.empty())
         return nullptr;
   }
#endif

   if(provider != "base" && !provider.empty()) {
      return nullptr;
   }

#if defined(BOTAN_HAS_STREAM_CIPHER)
   if(auto sc = StreamCipher::create(algo)) {
      return std::make_unique<Stream_Cipher_Mode>(std::move(sc));
   }
#endif

#if defined(BOTAN_HAS_AEAD_MODES)
   if(auto aead = AEAD_Mode::create(algo, direction)) {
      return aead;
   }
#endif

   if(algo.find('/') != std::string::npos) {
      const std::vector<std::string> algo_parts = split_on(algo, '/');
      const std::string_view cipher_name = algo_parts[0];
      const std::vector<std::string> mode_info = parse_algorithm_name(algo_parts[1]);

      if(mode_info.empty()) {
         return std::unique_ptr<Cipher_Mode>();
      }

      std::ostringstream mode_name;

      mode_name << mode_info[0] << '(' << cipher_name;
      for(size_t i = 1; i < mode_info.size(); ++i) {
         mode_name << ',' << mode_info[i];
      }
      for(size_t i = 2; i < algo_parts.size(); ++i) {
         mode_name << ',' << algo_parts[i];
      }
      mode_name << ')';

      return Cipher_Mode::create(mode_name.str(), direction, provider);
   }

#if defined(BOTAN_HAS_BLOCK_CIPHER)

   const SCAN_Name spec(algo);

   if(spec.arg_count() == 0) {
      return std::unique_ptr<Cipher_Mode>();
   }

   auto bc = BlockCipher::create(spec.arg(0), provider);

   if(!bc) {
      return std::unique_ptr<Cipher_Mode>();
   }

   #if defined(BOTAN_HAS_MODE_CBC)
   if(spec.algo_name() == "CBC") {
      const std::string padding = spec.arg(1, "PKCS7");

      if(padding == "CTS") {
         if(direction == Cipher_Dir::Encryption) {
            return std::make_unique<CTS_Encryption>(std::move(bc));
         } else {
            return std::make_unique<CTS_Decryption>(std::move(bc));
         }
      } else {
         auto pad = BlockCipherModePaddingMethod::create(padding);

         if(pad) {
            if(direction == Cipher_Dir::Encryption) {
               return std::make_unique<CBC_Encryption>(std::move(bc), std::move(pad));
            } else {
               return std::make_unique<CBC_Decryption>(std::move(bc), std::move(pad));
            }
         }
      }
   }
   #endif

   #if defined(BOTAN_HAS_MODE_XTS)
   if(spec.algo_name() == "XTS") {
      if(direction == Cipher_Dir::Encryption) {
         return std::make_unique<XTS_Encryption>(std::move(bc));
      } else {
         return std::make_unique<XTS_Decryption>(std::move(bc));
      }
   }
   #endif

   #if defined(BOTAN_HAS_MODE_CFB)
   if(spec.algo_name() == "CFB") {
      const size_t feedback_bits = spec.arg_as_integer(1, 8 * bc->block_size());
      if(direction == Cipher_Dir::Encryption) {
         return std::make_unique<CFB_Encryption>(std::move(bc), feedback_bits);
      } else {
         return std::make_unique<CFB_Decryption>(std::move(bc), feedback_bits);
      }
   }
   #endif

#endif

   return std::unique_ptr<Cipher_Mode>();
}

//static
std::vector<std::string> Cipher_Mode::providers(std::string_view algo_spec) {
   const std::vector<std::string>& possible = {"base", "commoncrypto"};
   std::vector<std::string> providers;
   for(auto&& prov : possible) {
      auto mode = Cipher_Mode::create(algo_spec, Cipher_Dir::Encryption, prov);
      if(mode) {
         providers.push_back(prov);  // available
      }
   }
   return providers;
}

}  // namespace Botan

1	/*
2	* Cipher Modes
3	* (C) 2015 Jack Lloyd
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/cipher_mode.h>
9
10	#include <botan/exceptn.h>
11	#include <botan/internal/parsing.h>
12	#include <botan/internal/scan_name.h>
13	#include <botan/internal/stream_mode.h>
14	#include <memory>
15	#include <sstream>
16	#include <utility>
17
18	#if defined(BOTAN_HAS_BLOCK_CIPHER)
19	#include <botan/block_cipher.h>
20	#endif
21
22	#if defined(BOTAN_HAS_AEAD_MODES)
23	#include <botan/aead.h>
24	#endif
25
26	#if defined(BOTAN_HAS_MODE_CBC)
27	#include <botan/internal/cbc.h>
28	#endif
29
30	#if defined(BOTAN_HAS_MODE_CFB)
31	#include <botan/internal/cfb.h>
32	#endif
33
34	#if defined(BOTAN_HAS_MODE_XTS)
35	#include <botan/internal/xts.h>
36	#endif
37
38	#if defined(BOTAN_HAS_COMMONCRYPTO)
39	#include <botan/internal/commoncrypto.h>
40	#endif
41
42	namespace Botan {
43
44	std::unique_ptr<Cipher_Mode> Cipher_Mode::create_or_throw(std::string_view algo,	163✔
45	Cipher_Dir direction,
46	std::string_view provider) {
47	if(auto mode = Cipher_Mode::create(algo, direction, provider)) {	163✔
48	return mode;	162✔
49	}	162✔
50
51	throw Lookup_Error("Cipher mode", algo, provider);	1✔
52	}
53
54	std::unique_ptr<Cipher_Mode> Cipher_Mode::create(std::string_view algo,	13,889✔
55	Cipher_Dir direction,
56	std::string_view provider) {
57	#if defined(BOTAN_HAS_COMMONCRYPTO)
58	if(provider.empty() \|\| provider == "commoncrypto") {
59	if(auto cm = make_commoncrypto_cipher_mode(algo, direction))
60	return cm;
61
62	if(!provider.empty())
63	return nullptr;
64	}
65	#endif
66
67	if(provider != "base" && !provider.empty()) {	21,365✔
68	return nullptr;	1,250✔
69	}
70
71	#if defined(BOTAN_HAS_STREAM_CIPHER)
72	if(auto sc = StreamCipher::create(algo)) {	12,639✔
73	return std::make_unique<Stream_Cipher_Mode>(std::move(sc));	51✔
74	}	51✔
75	#endif
76
77	#if defined(BOTAN_HAS_AEAD_MODES)
78	if(auto aead = AEAD_Mode::create(algo, direction)) {	12,588✔
79	return aead;	631✔
80	}	631✔
81	#endif
82
83	if(algo.find('/') != std::string::npos) {	11,957✔
84	const std::vector<std::string> algo_parts = split_on(algo, '/');	5,845✔
85	const std::string_view cipher_name = algo_parts[0];	5,845✔
86	const std::vector<std::string> mode_info = parse_algorithm_name(algo_parts[1]);	5,845✔
87
88	if(mode_info.empty()) {	5,845✔
89	return std::unique_ptr<Cipher_Mode>();	×
90	}
91
92	std::ostringstream mode_name;	5,845✔
93
94	mode_name << mode_info[0] << '(' << cipher_name;	5,845✔
95	for(size_t i = 1; i < mode_info.size(); ++i) {	6,077✔
96	mode_name << ',' << mode_info[i];	232✔
97	}
98	for(size_t i = 2; i < algo_parts.size(); ++i) {	7,213✔
99	mode_name << ',' << algo_parts[i];	1,368✔
100	}
101	mode_name << ')';	5,845✔
102
103	return Cipher_Mode::create(mode_name.str(), direction, provider);	5,845✔
104	}	5,845✔
105
106	#if defined(BOTAN_HAS_BLOCK_CIPHER)
107
108	const SCAN_Name spec(algo);	6,112✔
109
110	if(spec.arg_count() == 0) {	6,112✔
111	return std::unique_ptr<Cipher_Mode>();	1✔
112	}
113
114	auto bc = BlockCipher::create(spec.arg(0), provider);	6,111✔
115
116	if(!bc) {	6,111✔
117	return std::unique_ptr<Cipher_Mode>();	2✔
118	}
119
120	#if defined(BOTAN_HAS_MODE_CBC)
121	if(spec.algo_name() == "CBC") {	6,109✔
122	const std::string padding = spec.arg(1, "PKCS7");	2,582✔
123
124	if(padding == "CTS") {	2,582✔
125	if(direction == Cipher_Dir::Encryption) {	218✔
126	return std::make_unique<CTS_Encryption>(std::move(bc));	133✔
127	} else {
128	return std::make_unique<CTS_Decryption>(std::move(bc));	85✔
129	}
130	} else {
131	auto pad = BlockCipherModePaddingMethod::create(padding);	2,364✔
132
133	if(pad) {	2,364✔
134	if(direction == Cipher_Dir::Encryption) {	2,364✔
135	return std::make_unique<CBC_Encryption>(std::move(bc), std::move(pad));	1,347✔
136	} else {
137	return std::make_unique<CBC_Decryption>(std::move(bc), std::move(pad));	1,017✔
138	}
139	}
140	}	2,364✔
141	}	2,582✔
142	#endif
143
144	#if defined(BOTAN_HAS_MODE_XTS)
145	if(spec.algo_name() == "XTS") {	3,527✔
146	if(direction == Cipher_Dir::Encryption) {	2,822✔
147	return std::make_unique<XTS_Encryption>(std::move(bc));	1,829✔
148	} else {
149	return std::make_unique<XTS_Decryption>(std::move(bc));	993✔
150	}
151	}
152	#endif
153
154	#if defined(BOTAN_HAS_MODE_CFB)
155	if(spec.algo_name() == "CFB") {	705✔
156	const size_t feedback_bits = spec.arg_as_integer(1, 8 * bc->block_size());	705✔
157	if(direction == Cipher_Dir::Encryption) {	705✔
158	return std::make_unique<CFB_Encryption>(std::move(bc), feedback_bits);	340✔
159	} else {
160	return std::make_unique<CFB_Decryption>(std::move(bc), feedback_bits);	365✔
161	}
162	}
163	#endif
164
165	#endif
166
167	return std::unique_ptr<Cipher_Mode>();	×
168	}	6,112✔
169
170	//static
171	std::vector<std::string> Cipher_Mode::providers(std::string_view algo_spec) {	1,250✔
172	const std::vector<std::string>& possible = {"base", "commoncrypto"};	1,250✔
173	std::vector<std::string> providers;	1,250✔
174	for(auto&& prov : possible) {	3,750✔
175	auto mode = Cipher_Mode::create(algo_spec, Cipher_Dir::Encryption, prov);	2,500✔
176	if(mode) {	2,500✔
177	providers.push_back(prov); // available	1,248✔
178	}
179	}	2,500✔
180	return providers;	1,250✔
181	}	1,250✔
182
183	} // namespace Botan

randombit / botan / 21768358452

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