Crypto++ 8.9
Free C++ class library of cryptographic schemes
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OFB block cipher mode of operation. More...
#include <modes.h>
Public Member Functions | |
bool | CipherIsRandomAccess () const |
Flag indicating random access. | |
IV_Requirement | IVRequirement () const |
Minimal requirement for secure IVs. | |
Public Member Functions inherited from CipherModeBase | |
std::string | AlgorithmProvider () const |
Retrieve the provider of this algorithm. | |
size_t | MinKeyLength () const |
Returns smallest valid key length. | |
size_t | MaxKeyLength () const |
Returns largest valid key length. | |
size_t | DefaultKeyLength () const |
Returns default key length. | |
size_t | GetValidKeyLength (size_t keylength) const |
Returns a valid key length for the algorithm. | |
bool | IsValidKeyLength (size_t keylength) const |
Returns whether keylength is a valid key length. | |
unsigned int | OptimalDataAlignment () const |
Provides input and output data alignment for optimal performance. | |
unsigned int | IVSize () const |
Returns length of the IV accepted by this object. | |
void | SetCipher (BlockCipher &cipher) |
Set external block cipher. | |
void | SetCipherWithIV (BlockCipher &cipher, const byte *iv, int feedbackSize=0) |
Set external block cipher and IV. | |
Public Member Functions inherited from SimpleKeyingInterface | |
virtual void | SetKey (const byte *key, size_t length, const NameValuePairs ¶ms=g_nullNameValuePairs) |
Sets or reset the key of this object. | |
void | SetKeyWithRounds (const byte *key, size_t length, int rounds) |
Sets or reset the key of this object. | |
void | SetKeyWithIV (const byte *key, size_t length, const byte *iv, size_t ivLength) |
Sets or reset the key of this object. | |
void | SetKeyWithIV (const byte *key, size_t length, const byte *iv) |
Sets or reset the key of this object. | |
bool | IsResynchronizable () const |
Determines if the object can be resynchronized. | |
bool | CanUseRandomIVs () const |
Determines if the object can use random IVs. | |
bool | CanUsePredictableIVs () const |
Determines if the object can use random but possibly predictable IVs. | |
bool | CanUseStructuredIVs () const |
Determines if the object can use structured IVs. | |
unsigned int | DefaultIVLength () const |
Provides the default size of an IV. | |
virtual unsigned int | MinIVLength () const |
Provides the minimum size of an IV. | |
virtual unsigned int | MaxIVLength () const |
Provides the maximum size of an IV. | |
virtual void | Resynchronize (const byte *iv, int ivLength=-1) |
Resynchronize with an IV. | |
virtual void | GetNextIV (RandomNumberGenerator &rng, byte *iv) |
Retrieves a secure IV for the next message. | |
Public Member Functions inherited from StreamTransformation | |
StreamTransformation & | Ref () |
Provides a reference to this object. | |
virtual unsigned int | MandatoryBlockSize () const |
Provides the mandatory block size of the cipher. | |
virtual unsigned int | OptimalBlockSize () const |
Provides the input block size most efficient for this cipher. | |
virtual unsigned int | GetOptimalBlockSizeUsed () const |
Provides the number of bytes used in the current block when processing at optimal block size. | |
virtual void | ProcessData (byte *outString, const byte *inString, size_t length)=0 |
Encrypt or decrypt an array of bytes. | |
virtual size_t | ProcessLastBlock (byte *outString, size_t outLength, const byte *inString, size_t inLength) |
Encrypt or decrypt the last block of data. | |
virtual unsigned int | MinLastBlockSize () const |
Provides the size of the last block. | |
virtual bool | IsLastBlockSpecial () const |
Determines if the last block receives special processing. | |
void | ProcessString (byte *inoutString, size_t length) |
Encrypt or decrypt a string of bytes. | |
void | ProcessString (byte *outString, const byte *inString, size_t length) |
Encrypt or decrypt a string of bytes. | |
byte | ProcessByte (byte input) |
Encrypt or decrypt a byte. | |
virtual bool | IsRandomAccess () const =0 |
Determines whether the cipher supports random access. | |
virtual void | Seek (lword pos) |
Seek to an absolute position. | |
virtual bool | IsSelfInverting () const =0 |
Determines whether the cipher is self-inverting. | |
virtual bool | IsForwardTransformation () const =0 |
Determines if the cipher is being operated in its forward direction. | |
Public Member Functions inherited from Algorithm | |
Algorithm (bool checkSelfTestStatus=true) | |
Interface for all crypto algorithms. | |
virtual std::string | AlgorithmName () const |
Provides the name of this algorithm. | |
Public Member Functions inherited from Clonable | |
virtual Clonable * | Clone () const |
Copies this object. | |
Public Member Functions inherited from AdditiveCipherAbstractPolicy | |
virtual unsigned int | GetOptimalBlockSize () const |
Provides number of ideal bytes to process. | |
virtual bool | CanOperateKeystream () const |
Flag indicating. | |
virtual void | OperateKeystream (KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount) |
Operates the keystream. | |
virtual void | SeekToIteration (lword iterationCount) |
Seeks to a random position in the stream. | |
virtual std::string | AlgorithmProvider () const |
Retrieve the provider of this algorithm. | |
Static Public Member Functions | |
static const char * | StaticAlgorithmName () |
Additional Inherited Members | |
Public Types inherited from SimpleKeyingInterface | |
enum | IV_Requirement { UNIQUE_IV = 0 , RANDOM_IV , UNPREDICTABLE_RANDOM_IV , INTERNALLY_GENERATED_IV , NOT_RESYNCHRONIZABLE } |
Secure IVs requirements as enumerated values. More... | |
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inlinestatic |
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inlinevirtual |
Flag indicating random access.
Implements AdditiveCipherAbstractPolicy.
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inlinevirtual |
Minimal requirement for secure IVs.
Implements CipherModeBase.