OFB block cipher mode of operation. More...
#include <modes.h>
Inheritance diagram for OFB_ModePolicy:
Public Member Functions | |
| bool | CipherIsRandomAccess () const |
| Flag indicating random access. More... | |
| IV_Requirement | IVRequirement () const |
| Minimal requirement for secure IVs. More... | |
| Public Member Functions inherited from CipherModeBase | |
| std::string | AlgorithmProvider () const |
| Retrieve the provider of this algorithm. More... | |
| size_t | MinKeyLength () const |
| Returns smallest valid key length. More... | |
| size_t | MaxKeyLength () const |
| Returns largest valid key length. More... | |
| size_t | DefaultKeyLength () const |
| Returns default key length. More... | |
| size_t | GetValidKeyLength (size_t keylength) const |
| Returns a valid key length for the algorithm. More... | |
| bool | IsValidKeyLength (size_t keylength) const |
| Returns whether keylength is a valid key length. More... | |
| unsigned int | OptimalDataAlignment () const |
| Provides input and output data alignment for optimal performance. More... | |
| unsigned int | IVSize () const |
| Returns length of the IV accepted by this object. More... | |
| virtual IV_Requirement | IVRequirement () const =0 |
| Minimal requirement for secure IVs. More... | |
| void | SetCipher (BlockCipher &cipher) |
| Set external block cipher. More... | |
| void | SetCipherWithIV (BlockCipher &cipher, const byte *iv, int feedbackSize=0) |
| Set external block cipher and IV. More... | |
| Public Member Functions inherited from SimpleKeyingInterface | |
| virtual size_t | MinKeyLength () const =0 |
| Returns smallest valid key length. More... | |
| virtual size_t | MaxKeyLength () const =0 |
| Returns largest valid key length. More... | |
| virtual size_t | DefaultKeyLength () const =0 |
| Returns default key length. More... | |
| virtual size_t | GetValidKeyLength (size_t keylength) const =0 |
| Returns a valid key length for the algorithm. More... | |
| virtual bool | IsValidKeyLength (size_t keylength) const |
| Returns whether keylength is a valid key length. More... | |
| virtual void | SetKey (const byte *key, size_t length, const NameValuePairs ¶ms=g_nullNameValuePairs) |
| Sets or reset the key of this object. More... | |
| void | SetKeyWithRounds (const byte *key, size_t length, int rounds) |
| Sets or reset the key of this object. More... | |
| void | SetKeyWithIV (const byte *key, size_t length, const byte *iv, size_t ivLength) |
| Sets or reset the key of this object. More... | |
| void | SetKeyWithIV (const byte *key, size_t length, const byte *iv) |
| Sets or reset the key of this object. More... | |
| virtual IV_Requirement | IVRequirement () const =0 |
| Minimal requirement for secure IVs. More... | |
| bool | IsResynchronizable () const |
| Determines if the object can be resynchronized. More... | |
| bool | CanUseRandomIVs () const |
| Determines if the object can use random IVs. More... | |
| bool | CanUsePredictableIVs () const |
| Determines if the object can use random but possibly predictable IVs. More... | |
| bool | CanUseStructuredIVs () const |
| Determines if the object can use structured IVs. More... | |
| virtual unsigned int | IVSize () const |
| Returns length of the IV accepted by this object. More... | |
| unsigned int | DefaultIVLength () const |
| Provides the default size of an IV. More... | |
| virtual unsigned int | MinIVLength () const |
| Provides the minimum size of an IV. More... | |
| virtual unsigned int | MaxIVLength () const |
| Provides the maximum size of an IV. More... | |
| virtual void | Resynchronize (const byte *iv, int ivLength=-1) |
| Resynchronize with an IV. More... | |
| virtual void | GetNextIV (RandomNumberGenerator &rng, byte *iv) |
| Retrieves a secure IV for the next message. More... | |
| Public Member Functions inherited from StreamTransformation | |
| StreamTransformation & | Ref () |
| Provides a reference to this object. More... | |
| virtual unsigned int | MandatoryBlockSize () const |
| Provides the mandatory block size of the cipher. More... | |
| virtual unsigned int | OptimalBlockSize () const |
| Provides the input block size most efficient for this cipher. More... | |
| virtual unsigned int | GetOptimalBlockSizeUsed () const |
| Provides the number of bytes used in the current block when processing at optimal block size. More... | |
| virtual unsigned int | OptimalDataAlignment () const |
| Provides input and output data alignment for optimal performance. More... | |
| virtual void | ProcessData (byte *outString, const byte *inString, size_t length)=0 |
| Encrypt or decrypt an array of bytes. More... | |
| virtual size_t | ProcessLastBlock (byte *outString, size_t outLength, const byte *inString, size_t inLength) |
| Encrypt or decrypt the last block of data. More... | |
| virtual unsigned int | MinLastBlockSize () const |
| Provides the size of the last block. More... | |
| virtual bool | IsLastBlockSpecial () const |
| Determines if the last block receives special processing. More... | |
| void | ProcessString (byte *inoutString, size_t length) |
| Encrypt or decrypt a string of bytes. More... | |
| void | ProcessString (byte *outString, const byte *inString, size_t length) |
| Encrypt or decrypt a string of bytes. More... | |
| byte | ProcessByte (byte input) |
| Encrypt or decrypt a byte. More... | |
| virtual bool | IsRandomAccess () const =0 |
| Determines whether the cipher supports random access. More... | |
| virtual void | Seek (lword pos) |
| Seek to an absolute position. More... | |
| virtual bool | IsSelfInverting () const =0 |
| Determines whether the cipher is self-inverting. More... | |
| virtual bool | IsForwardTransformation () const =0 |
| Determines if the cipher is being operated in its forward direction. More... | |
| Public Member Functions inherited from Algorithm | |
| Algorithm (bool checkSelfTestStatus=true) | |
| Interface for all crypto algorithms. More... | |
| virtual std::string | AlgorithmName () const |
| Provides the name of this algorithm. More... | |
| virtual std::string | AlgorithmProvider () const |
| Retrieve the provider of this algorithm. More... | |
| Public Member Functions inherited from Clonable | |
| virtual Clonable * | Clone () const |
| Copies this object. More... | |
| Public Member Functions inherited from AdditiveCipherAbstractPolicy | |
| virtual unsigned int | GetAlignment () const |
| Provides data alignment requirements. More... | |
| virtual unsigned int | GetBytesPerIteration () const =0 |
| Provides number of bytes operated upon during an iteration. More... | |
| virtual unsigned int | GetOptimalBlockSize () const |
| Provides number of ideal bytes to process. More... | |
| virtual unsigned int | GetIterationsToBuffer () const =0 |
| Provides buffer size based on iterations. More... | |
| virtual void | WriteKeystream (byte *keystream, size_t iterationCount) |
| Generate the keystream. More... | |
| virtual bool | CanOperateKeystream () const |
| Flag indicating. More... | |
| virtual void | OperateKeystream (KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount) |
| Operates the keystream. More... | |
| virtual void | CipherSetKey (const NameValuePairs ¶ms, const byte *key, size_t length)=0 |
| Key the cipher. More... | |
| virtual void | CipherResynchronize (byte *keystreamBuffer, const byte *iv, size_t length) |
| Resynchronize the cipher. More... | |
| virtual bool | CipherIsRandomAccess () const =0 |
| Flag indicating random access. More... | |
| virtual void | SeekToIteration (lword iterationCount) |
| Seeks to a random position in the stream. More... | |
| virtual std::string | AlgorithmProvider () const |
| Retrieve the provider of this algorithm. More... | |
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... | |
Detailed Description
Member Function Documentation
◆ StaticAlgorithmName()
|
inlinestatic |
◆ CipherIsRandomAccess()
|
inlinevirtual |
Flag indicating random access.
- Returns
- true if the cipher is seekable, false otherwise
- See also
- SeekToIteration()
Implements AdditiveCipherAbstractPolicy.
◆ IVRequirement()
|
inlinevirtual |
Minimal requirement for secure IVs.
- Returns
- the secure IV requirement of the algorithm
Implements CipherModeBase.
The documentation for this class was generated from the following file:
