#include <cbcmac.h>
Inheritance diagram for CBC_MAC< T >:
Public Types | |
| enum | IV_Requirement { UNIQUE_IV = 0, RANDOM_IV, UNPREDICTABLE_RANDOM_IV, INTERNALLY_GENERATED_IV, NOT_RESYNCHRONIZABLE } |
Public Member Functions | |
| CBC_MAC (const byte *key, size_t length=SameKeyLengthAs< T >::DEFAULT_KEYLENGTH) | |
| std::string | AlgorithmName () const |
| returns name of this algorithm, not universally implemented yet | |
| size_t | MinKeyLength () const |
| virtual size_t | MinKeyLength () const =0 |
| returns smallest valid key length in bytes */ | |
| size_t | MaxKeyLength () const |
| virtual size_t | MaxKeyLength () const =0 |
| returns largest valid key length in bytes */ | |
| size_t | DefaultKeyLength () const |
| virtual size_t | DefaultKeyLength () const =0 |
| returns default (recommended) key length in bytes */ | |
| size_t | GetValidKeyLength (size_t n) const |
| virtual size_t | GetValidKeyLength (size_t n) const =0 |
| returns the smallest valid key length in bytes that is >= min(n, GetMaxKeyLength()) | |
| SimpleKeyingInterface::IV_Requirement | IVRequirement () const |
| virtual IV_Requirement | IVRequirement () const =0 |
| returns the minimal requirement for secure IVs | |
| unsigned int | IVSize () const |
| virtual unsigned int | IVSize () const |
| void | UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs ¶ms) |
| void | Update (const byte *input, size_t length) |
| process more input | |
| void | TruncatedFinal (byte *mac, size_t size) |
| truncated version of Final() | |
| unsigned int | DigestSize () const |
| size of the hash/digest/MAC returned by Final() | |
| 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, size_t ivLength) |
| calls SetKey() with an NameValuePairs object that just specifies "IV" | |
| void | SetKeyWithIV (const byte *key, size_t length, const byte *iv) |
| calls SetKey() with an NameValuePairs object that just specifies "IV" | |
| 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) | |
| unsigned int | DefaultIVLength () const |
| returns default length of IVs accepted by this object | |
| virtual unsigned int | MinIVLength () const |
| returns minimal length of IVs accepted by this object | |
| virtual unsigned int | MaxIVLength () const |
| returns maximal length of IVs accepted by this object | |
| virtual void | Resynchronize (const byte *iv, int ivLength=-1) |
| resynchronize with an IV. ivLength=-1 means use IVSize() | |
| virtual void | GetNextIV (RandomNumberGenerator &rng, byte *IV) |
| get a secure IV for the next message | |
| HashTransformation & | Ref () |
| return a reference to this object, useful for passing a temporary object to a function that takes a non-const reference | |
| virtual byte * | CreateUpdateSpace (size_t &size) |
| request space to write input into | |
| virtual void | Final (byte *digest) |
| compute hash for current message, then restart for a new message | |
| virtual void | Restart () |
| discard the current state, and restart with a new message | |
| unsigned int | TagSize () const |
| same as DigestSize() | |
| virtual unsigned int | BlockSize () const |
| block size of underlying compression function, or 0 if not block based | |
| virtual unsigned int | OptimalBlockSize () const |
| input to Update() should have length a multiple of this for optimal speed | |
| virtual unsigned int | OptimalDataAlignment () const |
| returns how input should be aligned for optimal performance | |
| virtual void | CalculateDigest (byte *digest, const byte *input, size_t length) |
| use this if your input is in one piece and you don't want to call Update() and Final() separately | |
| virtual bool | Verify (const byte *digest) |
| verify that digest is a valid digest for the current message, then reinitialize the object | |
| virtual bool | VerifyDigest (const byte *digest, const byte *input, size_t length) |
| use this if your input is in one piece and you don't want to call Update() and Verify() separately | |
| virtual void | CalculateTruncatedDigest (byte *digest, size_t digestSize, const byte *input, size_t length) |
| truncated version of CalculateDigest() | |
| virtual bool | TruncatedVerify (const byte *digest, size_t digestLength) |
| truncated version of Verify() | |
| virtual bool | VerifyTruncatedDigest (const byte *digest, size_t digestLength, const byte *input, size_t length) |
| truncated version of VerifyDigest() | |
| virtual Clonable * | Clone () const |
| this is not implemented by most classes yet | |
Static Public Member Functions | |
| static std::string | StaticAlgorithmName () |
| static std::string | StaticAlgorithmName () |
| static size_t | StaticGetValidKeyLength (size_t keylength) |
Static Public Attributes | |
| static const int | MIN_KEYLENGTH |
| static const int | MAX_KEYLENGTH |
| static const int | DEFAULT_KEYLENGTH |
| static const int | IV_REQUIREMENT |
| static const int | IV_LENGTH |
Protected Member Functions | |
| virtual void | UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs ¶ms)=0 |
| virtual BlockCipher & | AccessCipher ()=0 |
| const Algorithm & | GetAlgorithm () const |
| virtual const Algorithm & | GetAlgorithm () const =0 |
| void | ThrowIfInvalidKeyLength (size_t length) |
| void | ThrowIfResynchronizable () |
| void | ThrowIfInvalidIV (const byte *iv) |
| size_t | ThrowIfInvalidIVLength (int size) |
| const byte * | GetIVAndThrowIfInvalid (const NameValuePairs ¶ms, size_t &size) |
| void | AssertValidKeyLength (size_t length) const |
| void | ThrowIfInvalidTruncatedSize (size_t size) const |
Detailed Description
template<class T>
class CBC_MAC< T >
Compatible with FIPS 113. T should be a class derived from BlockCipherDocumentation. Secure only for fixed length messages. For variable length messages use CMAC or DMAC.
Definition at line 34 of file cbcmac.h.
Member Function Documentation
| void SimpleKeyingInterface::SetKey | ( | const byte * | key, | |
| size_t | length, | |||
| const NameValuePairs & | params = g_nullNameValuePairs | |||
| ) | [virtual, inherited] |
set or reset the key of this object
- Parameters:
-
params is used to specify Rounds, BlockSize, etc.
Definition at line 60 of file cryptlib.cpp.
Referenced by SimpleKeyingInterface::SetKeyWithIV(), and SimpleKeyingInterface::SetKeyWithRounds().
| bool SimpleKeyingInterface::IsResynchronizable | ( | ) | const [inline, inherited] |
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 386 of file cryptlib.h.
| void SimpleKeyingInterface::GetNextIV | ( | RandomNumberGenerator & | rng, | |
| byte * | IV | |||
| ) | [virtual, inherited] |
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.
Definition at line 136 of file cryptlib.cpp.
References RandomNumberGenerator::GenerateBlock().
| virtual void HashTransformation::Final | ( | byte * | digest | ) | [inline, virtual, inherited] |
compute hash for current message, then restart for a new message
- Precondition:
- size of digest == DigestSize().
Definition at line 545 of file cryptlib.h.
Referenced by PKCS5_PBKDF2_HMAC< T >::DeriveKey(), and HMAC_Base::TruncatedFinal().
| virtual bool HashTransformation::Verify | ( | const byte * | digest | ) | [inline, virtual, inherited] |
verify that digest is a valid digest for the current message, then reinitialize the object
Default implementation is to call Final() and do a bitwise comparison between its output and digest.
Definition at line 575 of file cryptlib.h.
The documentation for this class was generated from the following file:
Generated on Mon Aug 9 2010 15:56:55 for Crypto++ by
1.7.1