Base class for feedback based stream ciphers with SymmetricCipher interface.
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typedef BASE::PolicyInterface | PolicyInterface |
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template<class BASE>
class CFB_CipherTemplate< BASE >
Base class for feedback based stream ciphers with SymmetricCipher interface.
- Template Parameters
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Definition at line 562 of file strciphr.h.
◆ ProcessData()
Apply keystream to data.
- Parameters
-
outString | a buffer to write the transformed data |
inString | a buffer to read the data |
length | the size of the buffers, in bytes This is the primary method to operate a stream cipher. For example:
size_t size = 30;
byte plain[size] = "Do or do not; there is no try";
byte cipher[size];
...
ChaCha20 chacha(key, keySize);
chacha.ProcessData(cipher, plain, size);
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◆ Resynchronize()
Resynchronize the cipher.
- Parameters
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iv | a byte array used to resynchronize the cipher |
length | the size of the IV array |
◆ OptimalBlockSize()
Provides number of ideal bytes to process.
- Returns
- the ideal number of bytes to process Internally, the default implementation returns GetBytesPerIteration()
- See also
- GetBytesPerIteration() and GetOptimalNextBlockSize()
Definition at line 592 of file strciphr.h.
◆ GetOptimalNextBlockSize()
Provides number of ideal bytes to process.
- Returns
- the ideal number of bytes to process Internally, the default implementation returns remaining unprocessed bytes
- See also
- GetBytesPerIteration() and OptimalBlockSize()
Definition at line 598 of file strciphr.h.
◆ OptimalDataAlignment()
Provides number of ideal data alignment.
- Returns
- the ideal data alignment, in bytes
- See also
- GetAlignment() and OptimalBlockSize()
Definition at line 603 of file strciphr.h.
◆ IsRandomAccess()
Flag indicating random access.
- Returns
- true if the cipher is seekable, false otherwise
- See also
- Seek()
Definition at line 608 of file strciphr.h.
◆ IsSelfInverting()
Determines if the cipher is self inverting.
- Returns
- true if the stream cipher is self inverting, false otherwise
Definition at line 612 of file strciphr.h.
◆ AlgorithmProvider()
Retrieve the provider of this algorithm.
- Returns
- the algorithm provider The algorithm provider can be a name like "C++", "SSE", "NEON", "AESNI", "ARMv8" and "Power8". C++ is standard C++ code. Other labels, like SSE, usually indicate a specialized implementation using instructions from a higher instruction set architecture (ISA). Future labels may include external hardware like a hardware security module (HSM). Generally speaking Wei Dai's original IA-32 ASM code falls under "SSE2". Labels like "SSSE3" and "SSE4.1" follow after Wei's code and use intrinsics instead of ASM. Algorithms which combine different instructions or ISAs provide the dominant one. For example on x86
AES/GCM
returns "AESNI" rather than "CLMUL" or "AES+SSE4.1" or "AES+CLMUL" or "AES+SSE4.1+CLMUL".
- Note
- Provider is not universally implemented yet.
Definition at line 628 of file strciphr.h.
The documentation for this class was generated from the following file: