#include <cryptlib.h>
Inheritance diagram for SimpleKeyingInterface:
Definition at line 351 of file cryptlib.h.
Public Types | |
| enum | IV_Requirement { STRUCTURED_IV = 0, RANDOM_IV, UNPREDICTABLE_RANDOM_IV, INTERNALLY_GENERATED_IV, NOT_RESYNCHRONIZABLE } |
Public Member Functions | |
| virtual size_t | MinKeyLength () const=0 |
| returns smallest valid key length in bytes */ | |
| virtual size_t | MaxKeyLength () const=0 |
| returns largest valid key length in bytes */ | |
| virtual size_t | DefaultKeyLength () const=0 |
| returns default (recommended) key length in bytes */ | |
| virtual size_t | GetValidKeyLength (size_t n) const=0 |
| returns the smallest valid key length in bytes that is >= min(n, GetMaxKeyLength()) | |
| virtual bool | IsValidKeyLength (size_t n) const |
| returns whether n is a valid key length | |
| virtual void | SetKey (const byte *key, size_t length, const NameValuePairs ¶ms=g_nullNameValuePairs) |
| set or reset the key of this object | |
| void | SetKeyWithRounds (const byte *key, size_t length, int rounds) |
| calls SetKey() with an NameValuePairs object that just specifies "Rounds" | |
| void | SetKeyWithIV (const byte *key, size_t length, const byte *iv) |
| calls SetKey() with an NameValuePairs object that just specifies "IV" | |
| virtual IV_Requirement | IVRequirement () const=0 |
| returns the minimal requirement for secure IVs | |
| bool | IsResynchronizable () const |
| returns whether this object can be resynchronized (i.e. supports initialization vectors) | |
| bool | CanUseRandomIVs () const |
| returns whether this object can use random IVs (in addition to ones returned by GetNextIV) | |
| bool | CanUsePredictableIVs () const |
| returns whether this object can use random but possibly predictable IVs (in addition to ones returned by GetNextIV) | |
| bool | CanUseStructuredIVs () const |
| returns whether this object can use structured IVs, for example a counter (in addition to ones returned by GetNextIV) | |
| virtual unsigned int | IVSize () const |
| returns size of IVs used by this object | |
| virtual void | Resynchronize (const byte *IV) |
| resynchronize with an IV | |
| virtual void | GetNextIV (byte *IV) |
| get a secure IV for the next message | |
Protected Member Functions | |
| virtual const Algorithm & | GetAlgorithm () const=0 |
| virtual void | UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs ¶ms)=0 |
| void | ThrowIfInvalidKeyLength (size_t length) |
| void | ThrowIfResynchronizable () |
| void | ThrowIfInvalidIV (const byte *iv) |
| const byte * | GetIVAndThrowIfInvalid (const NameValuePairs ¶ms) |
| void | AssertValidKeyLength (size_t length) const |
| void SimpleKeyingInterface::SetKey | ( | const byte * | key, | |
| size_t | length, | |||
| const NameValuePairs & | params = g_nullNameValuePairs | |||
| ) | [virtual] |
set or reset the key of this object
| params | is used to specify Rounds, BlockSize, etc |
Definition at line 50 of file cryptlib.cpp.
References ThrowIfInvalidKeyLength().
Referenced by CBC_MAC< T >::CBC_MAC(), DMAC< T >::DMAC(), HMAC< T >::HMAC(), PanamaMAC< B >::PanamaMAC(), SetKeyWithIV(), SetKeyWithRounds(), and XMACC< T >::XMACC().
| bool SimpleKeyingInterface::IsResynchronizable | ( | ) | const [inline] |
returns whether this object can be resynchronized (i.e. supports initialization vectors)
If this function returns true, and no IV is passed to SetKey() and CanUseStructuredIVs()==true, an IV of all 0's will be assumed.
Definition at line 384 of file cryptlib.h.
Referenced by ThrowIfInvalidIV(), ThrowIfResynchronizable(), and BlockOrientedCipherModeBase::UncheckedSetKey().
| virtual void SimpleKeyingInterface::GetNextIV | ( | byte * | IV | ) | [inline, virtual] |
get a secure IV for the next message
This method should be called after you finish encrypting one message and are ready to start the next one. After calling it, you must call SetKey() or Resynchronize() before using this object again. This method is not implemented on decryption objects.
Reimplemented in CipherModeBase, and XMACC_Base< T >.
Definition at line 400 of file cryptlib.h.
1.5.1-p1