- stretch 4.04.00-1
- testing 4.08.06-1
- unstable 4.08.06-1
- experimental 4.09.00-1
FBB::ISymCryptStream(3bobcat) | Symmetric en- and decryption | FBB::ISymCryptStream(3bobcat) |
NAME¶
FBB::ISymCryptStream - Istream performing symmetric encryptionSYNOPSIS¶
#include <bobcat/isymcryptstream>Linking option: -lbobcat -lcrypto
DESCRIPTION¶
FBB::ISymCryptStream objects may be used to encrypt or decrypt information that is available on a separate std::istream.The class ISymCryptStream is a class template, using a FBB::CryptType template non-type parameter. Objects of the class FBB::ISymCryptStream<FBB::ENCRYPT> encrypt the information they receive, objects of the class FBB::ISymCryptStream<FBB::DECRYPT> decrypt the information they receive.
All symmetric encryption methods defined by the OpenSSL library that can be selected by name may be used in combination with EncryptBuf objects. To select a particular encryption method an identifier is passed to the constructor. E.g., "aes-128-cbc" indicating the AES (Rijndael) method, using 128 bit sized keys and blocks using `cbc’ mode (see below for an explanation).
Refer to the isymcryptstreambuf(3bobcat) man-page for a description of available encryption methods.
NAMESPACE¶
FBBAll constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.
INHERITS FROM¶
FBB::ISymCryptStreambuf (private),std::istream
CONSTRUCTOR¶
- o
- ISymCryptStream<CryptType>( std::istream &in, char
const *type, std::string const &key, std::string const
&iv, size_t bufSize = 100, size_t filterBufSize = 1000,
ENGINE *engine = 0):
This constructor initializes a std::istream providing it with an FBB::ISymCryptStreambuf stream buffer. The ISymCryptStreambuf’s constructor receives all arguments that are passed to this constructor. - - ISymCryptStream<ENCRYPT> objects perform encryption;
ISymCryptStream<DECRYPT> objects perform decryption;
- ISymCryptStream<CryptType> objects obtain the bytes to encrypt or decrypt from std::istream ∈
- The encryption method to use is specified by the type parameter. E.g., "bf-cbc" selects the Blowfish Cipher Block Chaining method;
- The symmetric key to use is specified by the key parameter;
- The initialization vector is specified by the iv parameter;
- The FBB::ISymCryptStreambuf internally used buffer will contain bufSize characters. The default value is the smallest value that is used. When a smaller bufSize value is specified, the default value is used;
- The internally used IFilterStreambuf is initialized with a buffer of size filterBufSize, using a lower bound of 100;
- The parameter ENGINE can be used to specify a hardware acceleration engine, as supported by the used encryption/decryption method. Its default argument value indicates that no hardware acceleration is available.
INHERITED MEMBERS¶
Since the class uses public derivation from std::istream, all members of this class can be used.EXAMPLE¶
#include "../isymcryptstream" #include <iostream> using namespace std; using namespace FBB; int main() { ISymCryptStream<ENCRYPT> encryptor(cin, "bf-cbc", "1234567890", "1234567890"); ISymCryptStream<DECRYPT> decryptor(encryptor, "bf-cbc", "1234567890", "1234567890"); cout << decryptor.rdbuf(); }
FILES¶
bobcat/isymcryptstream - defines the class interfaceSEE ALSO¶
bobcat(7), isymcryptstreambuf(3bobcat)BUGS¶
Sep/Oct 2013: due to a change in library handling by the linker (cf. http://fedoraproject.org/wiki/UnderstandingDSOLinkChange and https://wiki.debian.org/ToolChain/DSOLinking) libraries that are indirectly required are no longer automatically linked to your program. With BigInt this is libcrypto, which requires programs to link to both bobcat and crypto.DISTRIBUTION FILES¶
- o
- bobcat_4.04.00-x.dsc: detached signature;
- o
- bobcat_4.04.00-x.tar.gz: source archive;
- o
- bobcat_4.04.00-x_i386.changes: change log;
- o
- libbobcat1_4.04.00-x_*.deb: debian package holding the libraries;
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- libbobcat1-dev_4.04.00-x_*.deb: debian package holding the libraries, headers and manual pages;
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- http://sourceforge.net/projects/bobcat: public archive location;
BOBCAT¶
Bobcat is an acronym of `Brokken’s Own Base Classes And Templates’.COPYRIGHT¶
This is free software, distributed under the terms of the GNU General Public License (GPL).AUTHOR¶
Frank B. Brokken (f.b.brokken@rug.nl).2005-2016 | libbobcat-dev_4.04.00-x.tar.gz |