*** History ***

The History file contains the items that comprise the release notes. The
items in the list below used to be in Readme.txt. Readme.txt now contans the
last several releases.

1.0 - First public release.  Withdrawn at the request of RSA DSI.
    - included Blowfish, BBS, DES, DH, Diamond, DSA, ElGamal, IDEA,
      MD5, RC4, RC5, RSA, SHA, WAKE, secret sharing, DEFLATE compression
    - had a serious bug in the RSA key generation code.

1.1 - Removed RSA, RC4, RC5
    - Disabled calls to RSAREF's non-public functions
    - Minor bugs fixed

2.0 - a completely new, faster multiprecision integer class
    - added MD5-MAC, HAVAL, 3-WAY, TEA, SAFER, LUC, Rabin, BlumGoldwasser,
      elliptic curve algorithms
    - added the Lucas strong probable primality test
    - ElGamal encryption and signature schemes modified to avoid weaknesses
    - Diamond changed to Diamond2 because of key schedule weakness
    - fixed bug in WAKE key setup
    - SHS class renamed to SHA
    - lots of miscellaneous optimizations

2.1 - added Tiger, HMAC, GOST, RIPE-MD160, LUCELG, LUCDIF, XOR-MAC,
      OAEP, PSSR, SHARK
    - added precomputation to DH, ElGamal, DSA, and elliptic curve algorithms
    - added back RC5 and a new RSA
    - optimizations in elliptic curves over GF(p)
    - changed Rabin to use OAEP and PSSR
    - changed many classes to allow copy constructors to work correctly
    - improved exception generation and handling

2.2 - added SEAL, CAST-128, Square
    - fixed bug in HAVAL (padding problem)
    - fixed bug in triple-DES (decryption order was reversed)
    - fixed bug in RC5 (couldn't handle key length not a multiple of 4)
    - changed HMAC to conform to RFC-2104 (which is not compatible
      with the original HMAC)
    - changed secret sharing and information dispersal to use GF(2^32)
      instead of GF(65521)
    - removed zero knowledge prover/verifier for graph isomorphism
    - removed several utility classes in favor of the C++ standard library

2.3 - ported to EGCS
    - fixed incomplete workaround of min/max conflict in MSVC

3.0 - placed all names into the "CryptoPP" namespace
    - added MD2, RC2, RC6, MARS, RW, DH2, MQV, ECDHC, CBC-CTS
    - added abstract base classes PK_SimpleKeyAgreementDomain and
      PK_AuthenticatedKeyAgreementDomain
    - changed DH and LUCDIF to implement the PK_SimpleKeyAgreementDomain
      interface and to perform domain parameter and key validation
    - changed interfaces of PK_Signer and PK_Verifier to sign and verify
      messages instead of message digests
    - changed OAEP to conform to PKCS#1 v2.0
    - changed benchmark code to produce HTML tables as output
    - changed PSSR to track IEEE P1363a
    - renamed ElGamalSignature to NR and changed it to track IEEE P1363
    - renamed ECKEP to ECMQVC and changed it to track IEEE P1363
    - renamed several other classes for clarity
    - removed support for calling RSAREF
    - removed option to compile old SHA (SHA-0)
    - removed option not to throw exceptions

3.1 - added ARC4, Rijndael, Twofish, Serpent, CBC-MAC, DMAC
    - added interface for querying supported key lengths of symmetric ciphers
      and MACs
    - added sample code for RSA signature and verification
    - changed CBC-CTS to be compatible with RFC 2040
    - updated SEAL to version 3.0 of the cipher specification
    - optimized multiprecision squaring and elliptic curves over GF(p)
    - fixed bug in MARS key setup
    - fixed bug with attaching objects to Deflator

3.2 - added DES-XEX3, ECDSA, DefaultEncryptorWithMAC
    - renamed DES-EDE to DES-EDE2 and TripleDES to DES-EDE3
    - optimized ARC4
    - generalized DSA to allow keys longer than 1024 bits
    - fixed bugs in GF2N and ModularArithmetic that can cause calculation errors
    - fixed crashing bug in Inflator when given invalid inputs
    - fixed endian bug in Serpent
    - fixed padding bug in Tiger

4.0 - added Skipjack, CAST-256, Panama, SHA-2 (SHA-256, SHA-384, and SHA-512),
      and XTR-DH
    - added a faster variant of Rabin's Information Dispersal Algorithm (IDA)
    - added class wrappers for these operating system features:
       * high resolution timers on Windows, Unix, and MacOS
       * Berkeley and Windows style sockets
       * Windows named pipes
       * /dev/random and /dev/urandom on Linux and FreeBSD
       * Microsoft's CryptGenRandom on Windows
    - added support for SEC 1 elliptic curve key format and compressed points
    - added support for X.509 public key format (subjectPublicKeyInfo) for
      RSA, DSA, and elliptic curve schemes
    - added support for DER and OpenPGP signature format for DSA
    - added support for ZLIB compressed data format (RFC 1950)
    - changed elliptic curve encryption to use ECIES (as defined in SEC 1)
    - changed MARS key schedule to reflect the latest specification
    - changed BufferedTransformation interface to support multiple channels
      and messages
    - changed CAST and SHA-1 implementations to use public domain source code
    - fixed bug in StringSource
    - optmized multi-precision integer code for better performance

4.1 - added more support for the recommended elliptic curve parameters in SEC 2
    - added Panama MAC, MARC4
    - added IV stealing feature to CTS mode
    - added support for PKCS #8 private key format for RSA, DSA, and elliptic
      curve schemes
    - changed Deflate, MD5, Rijndael, and Twofish to use public domain code
    - fixed a bug with flushing compressed streams
    - fixed a bug with decompressing stored blocks
    - fixed a bug with EC point decompression using non-trinomial basis
    - fixed a bug in NetworkSource::GeneralPump()
    - fixed a performance issue with EC over GF(p) decryption
    - fixed syntax to allow GCC to compile without -fpermissive
    - relaxed some restrictions in the license

4.2 - added support for longer HMAC keys
    - added MD4 (which is not secure so use for compatibility purposes only)
    - added compatibility fixes/workarounds for STLport 4.5, GCC 3.0.2,
      and MSVC 7.0
    - changed MD2 to use public domain code
    - fixed a bug with decompressing multiple messages with the same object
    - fixed a bug in CBC-MAC with MACing multiple messages with the same object
    - fixed a bug in RC5 and RC6 with zero-length keys
    - fixed a bug in Adler32 where incorrect checksum may be generated

5.0 - added ESIGN, DLIES, WAKE-OFB, PBKDF1 and PBKDF2 from PKCS #5
    - added key validation for encryption and signature public/private keys
    - renamed StreamCipher interface to SymmetricCipher, which is now implemented
      by both stream ciphers and block cipher modes including ECB and CBC
    - added keying interfaces to support resetting of keys and IVs without
      having to destroy and recreate objects
    - changed filter interface to support non-blocking input/output
    - changed SocketSource and SocketSink to use overlapped I/O on Microsoft Windows
    - grouped related classes inside structs to help templates, for example
      AESEncryption and AESDecryption are now AES::Encryption and AES::Decryption
    - where possible, typedefs have been added to improve backwards
      compatibility when the CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY macro is defined
    - changed Serpent, HAVAL and IDEA to use public domain code
    - implemented SSE2 optimizations for Integer operations
    - fixed a bug in HMAC::TruncatedFinal()
    - fixed SKIPJACK byte ordering following NIST clarification dated 5/9/02

5.01 - added known answer test for X9.17 RNG in FIPS 140 power-up self test
     - submitted to NIST/CSE, but not publicly released

5.02 - changed EDC test to MAC integrity check using HMAC/SHA1
     - improved performance of integrity check
     - added blinding to defend against RSA timing attack

5.03 - created DLL version of Crypto++ for FIPS 140-2 validation
     - fixed vulnerabilities in GetNextIV for CTR and OFB modes

5.0.4 - Removed DES, SHA-256, SHA-384, SHA-512 from DLL

5.1 - added PSS padding and changed PSSR to track IEEE P1363a draft standard
    - added blinding for RSA and Rabin to defend against timing attacks
      on decryption operations
    - changed signing and decryption APIs to support the above
    - changed WaitObjectContainer to allow waiting for more than 64
      objects at a time on Win32 platforms
    - fixed a bug in CBC and ECB modes with processing non-aligned data
    - fixed standard conformance bugs in DLIES (DHAES mode) and RW/EMSA2
      signature scheme (these fixes are not backwards compatible)
    - fixed a number of compiler warnings, minor bugs, and portability problems
    - removed Sapphire

5.2 - merged in changes for 5.01 - 5.0.4
    - added support for using encoding parameters and key derivation parameters
      with public key encryption (implemented by OAEP and DL/ECIES)
    - added Camellia, SHACAL-2, Two-Track-MAC, Whirlpool, RIPEMD-320,
      RIPEMD-128, RIPEMD-256, Base-32 coding, FIPS variant of CFB mode
    - added ThreadUserTimer for timing thread CPU usage
    - added option for password-based key derivation functions
      to iterate until a mimimum elapsed thread CPU time is reached
    - added option (on by default) for DEFLATE compression to detect
      uncompressible files and process them more quickly
    - improved compatibility and performance on 64-bit platforms,
      including Alpha, IA-64, x86-64, PPC64, Sparc64, and MIPS64
    - fixed ONE_AND_ZEROS_PADDING to use 0x80 instead 0x01 as padding.
    - fixed encoding/decoding of PKCS #8 privateKeyInfo to properly
      handle optional attributes

5.2.1 - fixed bug in the "dlltest" DLL testing program
      - fixed compiling with STLport using VC .NET
      - fixed compiling with -fPIC using GCC
      - fixed compiling with -msse2 on systems without memalign()
      - fixed inability to instantiate PanamaMAC
      - fixed problems with inline documentation

5.2.2 - added SHA-224
      - put SHA-256, SHA-384, SHA-512, RSASSA-PSS into DLL

5.2.3 - fixed issues with FIPS algorithm test vectors
      - put RSASSA-ISO into DLL

5.3 - ported to MSVC 2005 with support for x86-64
    - added defense against AES timing attacks, and more AES test vectors
    - changed StaticAlgorithmName() of Rijndael to "AES", CTR to "CTR"

5.4 - added Salsa20
    - updated Whirlpool to version 3.0
    - ported to GCC 4.1, Sun C++ 5.8, and Borland C++Builder 2006

5.5 - added VMAC and Sosemanuk (with x86-64 and SSE2 assembly)
    - improved speed of integer arithmetic, AES, SHA-512, Tiger, Salsa20,
      Whirlpool, and PANAMA cipher using assembly (x86-64, MMX, SSE2)
    - optimized Camellia and added defense against timing attacks
    - updated benchmarks code to show cycles per byte and to time key/IV setup
    - started using OpenMP for increased multi-core speed
    - enabled GCC optimization flags by default in GNUmakefile
    - added blinding and computational error checking for RW signing
    - changed RandomPool, X917RNG, GetNextIV, DSA/NR/ECDSA/ECNR to reduce
      the risk of reusing random numbers and IVs after virtual machine state
      rollback
    - changed default FIPS mode RNG from AutoSeededX917RNG<DES_EDE3> to
      AutoSeededX917RNG<AES>
    - fixed PANAMA cipher interface to accept 256-bit key and 256-bit IV
    - moved MD2, MD4, MD5, PanamaHash, ARC4, WAKE_CFB into the namespace "Weak"
    - removed HAVAL, MD5-MAC, XMAC

5.5.1 - fixed VMAC validation failure on 32-bit big-endian machines

5.5.2 - ported x64 assembly language code for AES, Salsa20, Sosemanuk, and Panama
        to MSVC 2005 (using MASM since MSVC doesn't support inline assembly on x64)
      - fixed Salsa20 initialization crash on non-SSE2 machines
      - fixed Whirlpool crash on Pentium 2 machines
      - fixed possible branch prediction analysis (BPA) vulnerability in
        MontgomeryReduce(), which may affect security of RSA, RW, LUC
      - fixed link error with MSVC 2003 when using "debug DLL" form of runtime library
      - fixed crash in SSE2_Add on P4 machines when compiled with
        MSVC 6.0 SP5 with Processor Pack
      - ported to MSVC 2008, GCC 4.2, Sun CC 5.9, Intel C++ Compiler 10.0,
        and Borland C++Builder 2007

5.6.0 - added AuthenticatedSymmetricCipher interface class and Filter wrappers
      - added CCM, GCM (with SSE2 assembly), EAX, CMAC, XSalsa20, and SEED
      - added support for variable length IVs
      - added OIDs for Brainpool elliptic curve parameters
      - improved AES and SHA-256 speed on x86 and x64
      - changed BlockTransformation interface to no longer assume data alignment
      - fixed incorrect VMAC computation on message lengths
        that are >64 mod 128 (x86 assembly version is not affected)
      - fixed compiler error in vmac.cpp on x86 with GCC -fPIC
      - fixed run-time validation error on x86-64 with GCC 4.3.2 -O2
      - fixed HashFilter bug when putMessage=true
      - fixed AES-CTR data alignment bug that causes incorrect encryption on ARM
      - removed WORD64_AVAILABLE; compiler support for 64-bit int is now required
      - ported to GCC 4.3, C++Builder 2009, Sun CC 5.10, Intel C++ Compiler 11

5.6.1 - added support for AES-NI and CLMUL instruction sets in AES and GMAC/GCM
      - removed WAKE-CFB
      - fixed several bugs in the SHA-256 x86/x64 assembly code:
         * incorrect hash on non-SSE2 x86 machines on non-aligned input
         * incorrect hash on x86 machines when input crosses 0x80000000
         * incorrect hash on x64 when compiled with GCC with optimizations enabled
      - fixed bugs in AES x86 and x64 assembly causing crashes in some MSVC build configurations
      - switched to a public domain implementation of MARS
      - ported to MSVC 2010, GCC 4.5.1, Sun Studio 12u1, C++Builder 2010, Intel C++ Compiler 11.1
      - renamed the MSVC DLL project to "cryptopp" for compatibility with MSVC 2010

5.6.2 - changed license to Boost Software License 1.0
      - added SHA-3 (Keccak)
      - updated DSA to FIPS 186-3 (see DSA2 class)
      - fixed Blowfish minimum keylength to be 4 bytes (32 bits)
      - fixed Salsa validation failure when compiling with GCC 4.6
      - fixed infinite recursion when on x64, assembly disabled, and no AESNI
      - ported to MSVC 2012, GCC 4.7, Clang 3.2, Solaris Studio 12.3, Intel C++ Compiler 13.0

5.6.3 - maintenance release, honored API/ABI/Versioning requirements
      - expanded processes to include community and its input
         * 12 unique contributors for this release
      - fixed CVE-2015-2141
      - cleared most Undefined Behavior Sanitizer (UBsan) findings
      - cleared all Address Sanitizer (Asan) findings
      - cleared all Valgrind findings
      - cleared all Coverity findings
      - cleared all Enterprise Analysis (/analyze) findings
      - cleared most GCC warnings with -Wall
      - cleared most Clang warnings with -Wall
      - cleared most MSVC warnings with /W4
      - added -fPIC 64-bit builds. Off by default for i386
      - added HKDF class from RFC 5868
      - switched to member_ptr due to C++ 11 warnings for auto_ptr
      - initialization of C++ static objects, off by default
         * GCC and init_priotirty/constructor attributes
         * MSVC and init_seg(lib)
         * CRYPTOPP_INIT_PRIORITY disabled by default, but available
      - improved OS X support
      - improved GNUmakefile support for Testing and QA
      - added self tests for additional Testing and QA
      - added cryptest.sh for systematic Testing and QA
      - added GNU Gold linker support
      - added Visual Studio 2010 solution and project files in vs2010.zip
      - added Clang integrated assembler support
      - unconditionally define CRYPTOPP_NO_UNALIGNED_DATA_ACCESS for Makefile
        target 'ubsan' and at -O3 due to GCC vectorization on x86 and x86_64
      - workaround ARMEL/GCC 5.2 bug and failed self test
      - fixed crash in MQV due to GCC 4.9+ and inlining
      - fixed hang in SHA due to GCC 4.9+ and inlining
      - fixed missing rdtables::Te under VS with ALIGNED_DATA_ACCESS
      - fixed S/390 and big endian feature detection
      - fixed S/390 and int128_t/uint128_t detection
      - fixed X32 (ILP32) feature detection
      - removed  _CRT_SECURE_NO_DEPRECATE for Microsoft platforms
      - utilized bound checking interfaces from ISO/IEC TR 24772 when available
      - improved ARM, ARM64, MIPS, MIPS64, S/390 and X32 (ILP32) support
      - introduced CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562
      - added additional Doxygen-based documentation
      - ported to MSVC 2015, Xcode 7.2, GCC 5.2, Clang 3.7, Intel C++ 16.00

5.6.4 - maintenance release, honored API/ABI/Versioning requirements
      - expanded community input and support
         * 22 unique contributors for this release
      - fixed CVE-2016-3995
      - changed SHA3 to FIPS 202 (F1600, XOF d=0x06)
      - added Keccak (F1600, XOF d=0x01)
      - added ChaCha (ChaCha8/12/20)
      - added HMQV and FHMQV
         * Hashed and Fully Hashed MQV
      - added BLAKE2 (BLAKE2s and BLAKE2b)
         * C++, SSE2, SSE4, ARM NEON and ARMv8 ASIMD
      - added CRC32-C
         * C/C++, Amd64 CRC, and ARMv8 CRC
      - improved Rabin-William signatures
         * Tweaked roots <em>e</em> and <em>f</em>
      - improved C++11 support
         * atomics, threads and fences
         * alginof, alignas
         * constexpr
         * noexcept
      - improved GCM mode
         * ARM NEON and ARMv8 ASIMD
         * ARMv8 carry-less multiply
      - improved Windows 8 and 10 support
         * Windows Phone, Universal Windows Platform, Windows Store
      - improved MIPS, ARMv7 and ARMv8 support
         * added scripts setenv-{android|embedded|ios}.sh for GNUmakefile-cross
         * aggressive use of -march=<arch> and -mfpu=<fpu> in cryptest.sh
      - improved build systems
         * Visual Studio 2010 default
         * added CMake support (lacks FindCryptopp.cmake)
         * archived VC++ 5/0/6.0 project files (vc60.zip)
         * archived VS2005 project files (vs2005.zip)
         * archived Borland project files (bds10.zip)
      - improved Testing and QA
         * expanded platforms and compilers
         * added code generation tests based on CPU features
         * added C++03, C++11, C++14, C++17 testing
         * added -O3, -O5, -Ofast and -Os testing
      - ported to MSVC 2015 SP3, Xcode 9.0, Sun Studio 12.5, GCC 7.0,
        MacPorts GCC 7.0, Clang 3.8, Intel C++ 17.00

5.6.5 - maintenance release, recompile of programs recommended
      - expanded community input and support
         * 25 unique contributors as of this release
      - fixed CVE-2016-7420 (Issue 277, document NDEBUG for production/release)
      - fixed CVE-2016-7544 (Issue 302, avoid _malloca and _freea)
      - shipped library in recommended state
         * backwards compatibility achieved with <config.compat>
      - Visual Studio project file cleanup
         * improved X86 and X64 MSBuild support
         * added ARM-based MSBuild awareness
      - improved Testing and QA
         * expanded platforms and compilers
         * expanded Coverity into OS X and Windows platforms
         * added Windows test scripts using Strawberry Perl
      - ported to MSVC 2015 SP3, Xcode 7.3, Sun Studio 12.5, GCC 7.0,
        MacPorts GCC 7.0, Clang 3.8, Intel C++ 17.00

6.0.0 - Major release, recompile of programs required
      - expanded community input and support
         * 43 unique contributors as of this release
      - fixed CVE-2016-9939 (Issue 346, transient DoS)
      - fixed CVE-2017-9434 (Issue 414, misidentified memory error)
      - converted to BASE+SIMD implementation
         * BASE provides an architecture neutral C++ implementation
         * SIMD provides architecture specific hardware acceleration
      - improved PowerPC Power4, Power7 and Power8 support
      - added ARIA, EC German DSA, Deterministic signatures (RFC 6979),
        Kalyna, NIST Hash and HMAC DRBG, Padlock RNG, Poly1305, SipHash,
        Simon, Speck, SM3, SM4, Threefish algorithms
      - added NaCl interface from the compact library
         * x25519 key exhange and ed25519 signing provided through NaCl interface
      - improved Testing and QA
      - ported to MSVC 2017, Xcode 8.1, Sun Studio 12.5, GCC 7.0,
        MacPorts GCC 7.0, Clang 4.0, Intel C++ 17.00, IBM XL C/C++ 13.1