forked from weidai11/cryptopp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Readme.txt
411 lines (345 loc) · 20.9 KB
/
Readme.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
Crypto++: free C++ Class Library of Cryptographic Schemes
Version 8.6 - TBD
Crypto++ Library is a free C++ class library of cryptographic schemes.
Currently the library contains the following algorithms:
algorithm type name
authenticated encryption schemes GCM, CCM, EAX, ChaCha20Poly1305 and
XChaCha20Poly1305
high speed stream ciphers ChaCha (8/12/20), ChaCha (IETF), Panama, Salsa20,
Sosemanuk, XSalsa20, XChaCha20
AES and AES candidates AES (Rijndael), RC6, MARS, Twofish, Serpent,
CAST-256
ARIA, Blowfish, Camellia, CHAM, HIGHT, IDEA,
Kalyna (128/256/512), LEA, SEED, RC5, SHACAL-2,
other block ciphers SIMON (64/128), Skipjack, SPECK (64/128),
Simeck, SM4, Threefish (256/512/1024),
Triple-DES (DES-EDE2 and DES-EDE3), TEA, XTEA
block cipher modes of operation ECB, CBC, CBC ciphertext stealing (CTS),
CFB, OFB, counter mode (CTR), XTS
message authentication codes BLAKE2s, BLAKE2b, CMAC, CBC-MAC, DMAC, GMAC, HMAC,
Poly1305, Poly1305 (IETF), SipHash, Two-Track-MAC,
VMAC
BLAKE2s, BLAKE2b, Keccack (F1600), LSH (256/512),
hash functions SHA-1, SHA-2 (224/256/384/512), SHA-3 (224/256),
SHA-3 (384/512), SHAKE (128/256), SipHash, SM3, Tiger,
RIPEMD (128/160/256/320), WHIRLPOOL
RSA, DSA, Deterministic DSA, ElGamal,
public-key cryptography Nyberg-Rueppel (NR), Rabin-Williams (RW), LUC,
LUCELG, EC-based German Digital Signature (ECGDSA),
DLIES (variants of DHAES), ESIGN
padding schemes for public-key PKCS#1 v2.0, OAEP, PSS, PSSR, IEEE P1363
systems EMSA2 and EMSA5
Diffie-Hellman (DH), Unified Diffie-Hellman (DH2),
key agreement schemes Menezes-Qu-Vanstone (MQV), Hashed MQV (HMQV),
Fully Hashed MQV (FHMQV), LUCDIF, XTR-DH
elliptic curve cryptography ECDSA, Deterministic ECDSA, ed25519, ECNR, ECIES,
ECDH, ECMQV, x25519
insecure or obsolescent MD2, MD4, MD5, Panama Hash, DES, ARC4, SEAL
algorithms retained for backwards 3.0, WAKE-OFB, DESX (DES-XEX3), RC2,
compatibility and historical SAFER, 3-WAY, GOST, SHARK, CAST-128, Square
value
Other features include:
* pseudo random number generators (PRNG): ANSI X9.17 appendix C, RandomPool,
DARN, VIA Padlock, RDRAND, RDSEED, NIST Hash and HMAC DRBGs
* password based key derivation functions: PBKDF1 and PBKDF2 from PKCS #5,
PBKDF from PKCS #12 appendix B, HKDF from RFC 5869, Scrypt from RFC 7914
* Shamir's secret sharing scheme and Rabin's information dispersal algorithm
(IDA)
* fast multi-precision integer (bignum) and polynomial operations
* finite field arithmetics, including GF(p) and GF(2^n)
* prime number generation and verification
* useful non-cryptographic algorithms
+ DEFLATE (RFC 1951) compression/decompression with gzip (RFC 1952) and
zlib (RFC 1950) format support
+ Hex, base-32, base-64, URL safe base-64 encoding and decoding
+ 32-bit CRC, CRC-C and Adler32 checksum
* class wrappers for these platform and operating system features (optional):
+ high resolution timers on Windows, Unix, and Mac OS
+ /dev/random, /dev/urandom, /dev/srandom
+ Microsoft's CryptGenRandom or BCryptGenRandom on Windows
* A high level interface for most of the above, using a filter/pipeline
metaphor
* benchmarks and validation testing
* x86, x64 (x86-64), x32 (ILP32), ARM-32, Aarch32, Aarch64 and Power8
in-core code for the commonly used algorithms
+ run-time CPU feature detection and code selection
+ supports GCC-style and MSVC-style inline assembly, and MASM for x64
+ x86, x64 (x86-64), x32 provides MMX, SSE2, and SSE4 implementations
+ ARM-32, Aarch32 and Aarch64 provides NEON, ASIMD and ARMv8 implementations
+ Power8 provides in-core AES using NX Crypto Acceleration
The Crypto++ library was originally written by Wei Dai. The library is now
maintained by several team members and the community. You are welcome to use it
for any purpose without paying anyone, but see License.txt for the fine print.
The following compilers are supported for this release. Please visit
http://www.cryptopp.com the most up to date build instructions and porting notes.
* Visual Studio 2003 - 2019
* GCC 3.3 - 10.1
* Apple Clang 4.3 - 12.0
* LLVM Clang 2.9 - 11.0
* C++ Builder 2015
* Intel C++ Compiler 9 - 16.0
* Sun Studio 12u1 - 12.6
* IBM XL C/C++ 10.0 - 14.0
*** Important Usage Notes ***
1. If a constructor for A takes a pointer to an object B (except primitive
types such as int and char), then A owns B and will delete B at A's
destruction. If a constructor for A takes a reference to an object B,
then the caller retains ownership of B and should not destroy it until
A no longer needs it.
2. Crypto++ is thread safe at the class level. This means you can use
Crypto++ safely in a multithreaded application, but you must provide
synchronization when multiple threads access a common Crypto++ object.
*** MSVC-Specific Information ***
To compile Crypto++ with MSVC, open "cryptest.sln" (for MSVC 2003 - 2015)
and build one or more of the following projects:
cryptest Non-DLL-Import Configuration - This builds the full static library
along with a full test driver.
cryptest DLL-Import Configuration - This builds a static library containing
only algorithms not in the DLL, along with a full test driver that uses
both the DLL and the static library.
cryptdll - This builds the DLL. Please note that if you wish to use Crypto++
as a FIPS validated module, you must use a pre-built DLL that has undergone
the FIPS validation process instead of building your own.
dlltest - This builds a sample application that only uses the DLL.
The DLL used to provide FIPS validated cryptography. The library was moved
to the CMVP's [Historical Validation List](http://csrc.nist.gov/groups/STM/cmvp/documents/140-1/140val-historical.htm).
The library and the DLL are no longer considered
validated. You should no longer use the DLL.
To use the Crypto++ DLL in your application, #include "dll.h" before including
any other Crypto++ header files, and place the DLL in the same directory as
your .exe file. dll.h includes the line #pragma comment(lib, "cryptopp")
so you don't have to explicitly list the import library in your project
settings. To use a static library form of Crypto++, make the "cryptlib"
project a dependency of your application project, or specify it as
an additional library to link with in your project settings.
In either case you should check the compiler options to
make sure that the library and your application are using the same C++
run-time libraries and calling conventions.
*** DLL Memory Management ***
Because it's possible for the Crypto++ DLL to delete objects allocated
by the calling application, they must use the same C++ memory heap. Three
methods are provided to achieve this.
1. The calling application can tell Crypto++ what heap to use. This method
is required when the calling application uses a non-standard heap.
2. Crypto++ can tell the calling application what heap to use. This method
is required when the calling application uses a statically linked C++ Run
Time Library. (Method 1 does not work in this case because the Crypto++ DLL
is initialized before the calling application's heap is initialized.)
3. Crypto++ can automatically use the heap provided by the calling application's
dynamically linked C++ Run Time Library. The calling application must
make sure that the dynamically linked C++ Run Time Library is initialized
before Crypto++ is loaded. (At this time it is not clear if it is possible
to control the order in which DLLs are initialized on Windows 9x machines,
so it might be best to avoid using this method.)
When Crypto++ attaches to a new process, it searches all modules loaded
into the process space for exported functions "GetNewAndDeleteForCryptoPP"
and "SetNewAndDeleteFromCryptoPP". If one of these functions is found,
Crypto++ uses methods 1 or 2, respectively, by calling the function.
Otherwise, method 3 is used.
*** Linux and Unix-like Specific Information ***
A makefile is included for you to compile Crypto++ with GCC and compatibles.
Make sure you are using GNU Make and GNU ld. The make process will produce
two files, libcryptopp.a and cryptest.exe. Run "cryptest.exe v" for the
validation suite and "cryptest.exe tv all" for additional test vectors.
The makefile uses '-DNDEBUG -g2 -O2' CXXFLAGS by default. If you use an
alternate build system, like Autotools or CMake, then ensure the build system
includes '-DNDEBUG' for production or release builds. The Crypto++ library uses
asserts for debugging and diagnostics during development; it does not
rely on them to crash a program at runtime.
If an assert triggers in production software, then unprotected sensitive
information could be egressed from the program to the filesystem or the
platform's error reporting program, like Apport on Ubuntu or CrashReporter
on Apple.
The makefile orders object files to help remediate problems associated with
C++ static initialization order. The library does not use custom linker scripts.
If you use an alternate build system, like Autotools or CMake, and collect source
files into a list, then ensure these three are at the head of the list: 'cryptlib.cpp
cpu.cpp integer.cpp <other sources>'. They should be linked in the same order:
'cryptlib.o cpu.o integer.o <other objects>'.
If your linker supports initialization attributes, like init_priority, then you can
define CRYPTOPP_INIT_PRIORITY to control object initialization order. Set it to a
value like 250. User programs can use CRYPTOPP_USER_PRIORITY to avoid conflicts with
library values. Initialization attributes are more reliable than object file ordering,
but its not ubiquitously supported by linkers.
The makefile links to the static version of the Crypto++ library to avoid binary
planting and other LD_PRELOAD tricks. You should use the static version of the
library in your programs to help avoid unwanted redirections.
*** Side Channel Attacks ***
Crypto++ attempts to resist side channel attacks using various remediations.
The remdiations are applied as a best effort but are probably incomplete. They
are incomplete due to cpu speculation bugs like Spectre, Meltdown, Foreshadow.
The attacks target both cpu caches and internal buffers. Intel generally refers
to internal buffer attacks as "Microarchitectural Data Sampling" (MDS).
The library uses hardware instructions when possible for block ciphers, hashes
and other operations. The hardware acceleration remediates some timing
attacks. The library also uses cache-aware algorithms and access patterns
to minimize leakage cache evictions.
Elliptic curves over binary fields are believed to leak information. The task is a
work in progress. We don't believe binary fields are used in production, so we feel it
is a low risk at the moment.
Crypto++ does not engage Specter remediations at this time. The GCC options
for Specter are -mfunction-return=thunk and -mindirect-branch=thunk, and the
library uses them during testing. If you want the Specter workarounds then add
the GCC options to your CXXFLAGS when building the library.
To help resist attacks you should disable hyperthreading on cpus. If you
suspect or find an information leak then please report it.
*** Documentation and Support ***
Crypto++ is documented through inline comments in header files, which are
processed through Doxygen to produce an HTML reference manual. You can find
a link to the manual from http://www.cryptopp.com. Also at that site is
the Crypto++ FAQ, which you should browse through before attempting to
use this library, because it will likely answer many of questions that
may come up. Finally, the site provide the wiki which has many topics
and code examples.
If you run into any problems, please try the Crypto++ mailing list.
The subscription information and the list archive are available on
http://www.cryptopp.com.
*** Source Code and Contributing ***
The source code and its planned changes are available at the following locations.
* The Crypto++ GitHub repository allows you to view the latest (unreleased)
Crypto++ source code via the Linux kernel's git beginning around June 2015.
Its also serves as an incubator to nurture and grow the library.
* The former Crypto++ SourceForge repository allows you to view the Crypto++
source code via Apache's subversion until about July 2015. At that time,
SourceForge had infrastructure problems and a cutover to GutHub was performed.
* The Roadmap on the wiki provides the general direction the library is heading.
It includes planned features and releases, and even some wishlist items.
Contributions of all types are welcomed. Contributions include the following.
* Bug finding and fixes
* Features and enhancements
* Test scripts and test cases
* Branch and release testing
* Documentation and updates
If you think you have found a bug in the library, then you should discuss it on the
Users mailing list. Discussing it will help bring the issue to the attention of folks
who can help resolve the issue. If you want to contribute a bug fix to the library,
then make a Pull Request or make a Diff available somewhere. Also see Bug Reports on
the wiki.
Features and enhancements are welcomend additions to the library. This category tends
to be time consuming because algorithms and their test cases need to be reviewed and
merged. Please be mindful of the test cases, and attempt to procure them from an
independent source.
The library cherishes test scripts and test cases. They ensure the library is fit and
they help uncover issues with the library before users experience them. If you have
some time, then write some test cases, especially the ones that are intended to break
things.
Branch and release testing is your chance to ensure Master (and planned merges) meets
your expectations and perform as expected. If you have a few spare cycles, then please
test Master on your favorite platform. We need more testing on MinGW, Windows Phone,
Windows Store, Solaris 10 (and below), and modern iOS and OS X (including TV and
Watch builds).
Documentation and updates includes both the inline source code annotations using
Doxygen, and the online information provided in the wiki. The wiki is more verbose and
usually provides more contextual information than the API reference. Besides testing,
documentation is one of the highest returns on investment.
*** History ***
The items in this section comprise the most recent history. Please see History.txt
for the record back to Crypto++ 1.0.
8.5.0 - March 7, 2021
- minor release, no recompile of programs required
- expanded community input and support
* 70 unique contributors as of this release
- port to Apple M1 hardware
8.4.0 - January 2, 2021
- minor release, recompile of programs required
- expanded community input and support
* 67 unique contributors as of this release
- fix SIGILL on POWER8 when compiling with GCC 10
- fix potential out-of-bounds write in FixedSizeAllocatorWithCleanup
- fix compile on AIX POWER7 with IBM XLC 12.01
- fix compile on Solaris with SunCC 12.6
- revert changes for constant-time elliptic curve algorithms
- fix makefile clean and distclean recipes
8.3.0 - December 20, 2020
- minor release, recompile of programs required
- expanded community input and support
* 66 unique contributors as of this release
- fix use of macro CRYPTOPP_ALIGN_DATA
- fix potential out-of-bounds read in ECDSA
- fix std::bad_alloc when using ByteQueue in pipeline
- fix missing CRYPTOPP_CXX17_EXCEPTIONS with Clang
- fix potential out-of-bounds read in GCM mode
- add configure.sh when preprocessor macros fail
- fix potential out-of-bounds read in SipHash
- fix compile error on POWER9 due to vec_xl_be
- fix K233 curve on POWER8
- add Cirrus CI testing
- fix broken encryption for some 64-bit ciphers
- fix Android cpu-features.c using C++ compiler
- disable RDRAND and RDSEED for some AMD processors
- fix BLAKE2 hash calculation using Salt and Personalization
- refresh Android and iOS build scripts
- add XTS mode
- fix circular dependency between misc.h and secblock.h
- add Certificate interface
- fix recursion in AES::Encryption without AESNI
- add missing OID for ElGamal encryption
- fix missing override in KeyDerivationFunction-derived classes
- fix RDSEED assemble under MSVC
- fix elliptic curve timing leaks (CVE-2019-14318)
- add link-library variable to Makefiles
- fix SIZE_MAX definition in misc.h
- add GetWord64 and PutWord64 to BufferedTransformation
- use HKDF in AutoSeededX917RNG::Reseed
- fix Asan finding in VMAC on i686 in inline asm
- fix undeclared identifier _mm_roti_epi64 on Gentoo
- fix ECIES and GetSymmetricKeyLength
- fix possible divide by zero in PKCS5_PBKDF2_HMAC
- refine ASN.1 encoders and decoders
- disable BMI2 code paths in Integer class
- fix use of CRYPTOPP_CLANG_VERSION
- add NEON SHA1, SHA256 and SHA512 from Cryptogams
- add ARM SHA1, SHA256 and SHA512 from Cryptogams
- make config.h more autoconf friendly
- handle Clang triplet armv8l-unknown-linux-gnueabihf
- fix reference binding to misaligned address in xed25519
- clear asserts in TestDataNameValuePairs
8.2.0 - April 28, 2019
- minor release, no recompile of programs required
- expanded community input and support
* 56 unique contributors as of this release
- use PowerPC unaligned loads and stores with Power8
- add SKIPJACK test vectors
- fix SHAKE-128 and SHAKE-256 compile
- removed IS_NEON from Makefile
- fix Aarch64 build on Fedora 29
- fix missing GF2NT_233_Multiply_Reduce_CLMUL in FIPS DLL
- add missing BLAKE2 constructors
- fix missing BlockSize() in BLAKE2 classes
8.1.0 - February 22, 2019
- minor release, no recompile of programs required
- expanded community input and support
* 56 unique contributors as of this release
- fix OS X PowerPC builds with Clang
- add Microsoft ARM64 support
- fix iPhone Simulator build due to missing symbols
- add CRYPTOPP_BUGGY_SIMD_LOAD_AND_STORE
- add carryless multiplies for NIST b233 and k233 curves
- fix OpenMP build due to use of OpenMP 4 with down-level compilers
- add SignStream and VerifyStream for ed25519 and large files
- fix missing AlgorithmProvider in PanamaHash
- add SHAKE-128 and SHAKE-256
- fix AVX2 build due to _mm256_broadcastsi128_si256
- add IETF ChaCha, XChaCha, ChaChaPoly1305 and XChaChaPoly1305
8.0.0 - December 28, 2018
- major release, recompile of programs required
- expanded community input and support
* 54 unique contributors as of this release
- add x25519 key exchange and ed25519 signature scheme
- add limited Asymmetric Key Package support from RFC 5958
- add Power9 DARN random number generator support
- add CHAM, HC-128, HC-256, Hight, LEA, Rabbit, Simeck
- fix FixedSizeAllocatorWithCleanup may be unaligned on some platforms
- cutover to GNU Make-based cpu feature tests
- rename files with dashes to underscores
- fix LegacyDecryptor and LegacyDecryptorWithMAC use wrong MAC
- fix incorrect AES/CBC decryption on Windows
- avoid Singleton<T> when possible, avoid std::call_once completely
- fix SPARC alignment problems due to GetAlignmentOf<T>() on word64
- add ARM AES asm implementation from Cryptogams
- remove CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS support
June 2015 - Changing of the guard. Wei Dai turned the library over to the
community. The first community release was Crypto++ 5.6.3. Wei is
no longer involved with the daily operations of the project. Wei
still provides guidance when we have questions.
Originally written by Wei Dai, maintained by the Crypto++ Project