Botan  1.10.9
Public Types | Public Member Functions | List of all members
Botan::MISTY1 Class Reference

#include <misty1.h>

Inheritance diagram for Botan::MISTY1:
Botan::Block_Cipher_Fixed_Params< 8, 16 > Botan::BlockCipher Botan::SymmetricAlgorithm Botan::Algorithm

Public Types

enum  
 

Public Member Functions

size_t block_size () const
 
void clear ()
 
BlockCipherclone () const
 
void decrypt (const byte in[], byte out[]) const
 
void decrypt (byte block[]) const
 
void decrypt_n (const byte in[], byte out[], size_t blocks) const
 
void encrypt (const byte in[], byte out[]) const
 
void encrypt (byte block[]) const
 
void encrypt_n (const byte in[], byte out[], size_t blocks) const
 
Key_Length_Specification key_spec () const
 
size_t maximum_keylength () const
 
size_t minimum_keylength () const
 
 MISTY1 (size_t rounds=8)
 
std::string name () const
 
size_t parallel_bytes () const
 
virtual size_t parallelism () const
 
void set_key (const SymmetricKey &key)
 
void set_key (const byte key[], size_t length)
 
bool valid_keylength (size_t length) const
 

Detailed Description

MISTY1

Definition at line 18 of file misty1.h.

Member Enumeration Documentation

anonymous enum
inherited

Constructor & Destructor Documentation

Botan::MISTY1::MISTY1 ( size_t  rounds = 8)
Parameters
roundsthe number of rounds. Must be 8 with the current implementation

Definition at line 254 of file misty1.cpp.

References Botan::to_string().

254  : EK(100), DK(100)
255  {
256  if(rounds != 8)
257  throw Invalid_Argument("MISTY1: Invalid number of rounds: "
258  + to_string(rounds));
259  }
std::invalid_argument Invalid_Argument
Definition: exceptn.h:20
std::string to_string(u64bit n, size_t min_len)
Definition: parsing.cpp:42

Member Function Documentation

size_t Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 >::block_size ( ) const
inlinevirtualinherited
Returns
block size of this algorithm

Implements Botan::BlockCipher.

Definition at line 108 of file block_cipher.h.

108 { return BS; }
void Botan::MISTY1::clear ( )
inlinevirtual

Zeroize internal state

Implements Botan::Algorithm.

Definition at line 24 of file misty1.h.

References Botan::zeroise().

24 { zeroise(EK); zeroise(DK); }
void zeroise(MemoryRegion< T > &vec)
Definition: secmem.h:415
BlockCipher* Botan::MISTY1::clone ( ) const
inlinevirtual

Get a new object representing the same algorithm as *this

Implements Botan::BlockCipher.

Definition at line 26 of file misty1.h.

26 { return new MISTY1; }
MISTY1(size_t rounds=8)
Definition: misty1.cpp:254
void Botan::BlockCipher::decrypt ( const byte  in[],
byte  out[] 
) const
inlineinherited

Decrypt a block.

Parameters
inThe ciphertext block to be decypted as a byte array. Must be of length block_size().
outThe byte array designated to hold the decrypted block. Must be of length block_size().

Definition at line 57 of file block_cipher.h.

Referenced by Botan::DESX::decrypt_n().

58  { decrypt_n(in, out, 1); }
virtual void decrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::BlockCipher::decrypt ( byte  block[]) const
inlineinherited

Decrypt a block.

Parameters
blockthe ciphertext block to be decrypted Must be of length block_size(). Will hold the result when the function has finished.

Definition at line 74 of file block_cipher.h.

74 { decrypt_n(block, block, 1); }
virtual void decrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::MISTY1::decrypt_n ( const byte  in[],
byte  out[],
size_t  blocks 
) const
virtual

Decrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)
blocksthe number of blocks to process

Implements Botan::BlockCipher.

Definition at line 155 of file misty1.cpp.

References Botan::Block_Cipher_Fixed_Params< 8, 16 >::BLOCK_SIZE, Botan::load_be< u16bit >(), and Botan::store_be().

156  {
157  for(size_t i = 0; i != blocks; ++i)
158  {
159  u16bit B0 = load_be<u16bit>(in, 2);
160  u16bit B1 = load_be<u16bit>(in, 3);
161  u16bit B2 = load_be<u16bit>(in, 0);
162  u16bit B3 = load_be<u16bit>(in, 1);
163 
164  for(size_t j = 0; j != 12; j += 3)
165  {
166  const u16bit* RK = &DK[8 * j];
167 
168  B2 ^= B3 | RK[0];
169  B3 ^= B2 & RK[1];
170  B0 ^= B1 | RK[2];
171  B1 ^= B0 & RK[3];
172 
173  u32bit T0, T1;
174 
175  T0 = FI(B2 ^ RK[ 4], RK[ 5], RK[ 6]) ^ B3;
176  T1 = FI(B3 ^ RK[ 7], RK[ 8], RK[ 9]) ^ T0;
177  T0 = FI(T0 ^ RK[10], RK[11], RK[12]) ^ T1;
178 
179  B0 ^= T1 ^ RK[13];
180  B1 ^= T0;
181 
182  T0 = FI(B0 ^ RK[14], RK[15], RK[16]) ^ B1;
183  T1 = FI(B1 ^ RK[17], RK[18], RK[19]) ^ T0;
184  T0 = FI(T0 ^ RK[20], RK[21], RK[22]) ^ T1;
185 
186  B2 ^= T1 ^ RK[23];
187  B3 ^= T0;
188  }
189 
190  B2 ^= B3 | DK[96];
191  B3 ^= B2 & DK[97];
192  B0 ^= B1 | DK[98];
193  B1 ^= B0 & DK[99];
194 
195  store_be(out, B0, B1, B2, B3);
196 
197  in += BLOCK_SIZE;
198  out += BLOCK_SIZE;
199  }
200  }
u16bit load_be< u16bit >(const byte in[], size_t off)
Definition: loadstor.h:132
unsigned short u16bit
Definition: types.h:27
void store_be(u16bit in, byte out[2])
Definition: loadstor.h:412
unsigned int u32bit
Definition: types.h:32
void Botan::BlockCipher::encrypt ( const byte  in[],
byte  out[] 
) const
inlineinherited

Encrypt a block.

Parameters
inThe plaintext block to be encrypted as a byte array. Must be of length block_size().
outThe byte array designated to hold the encrypted block. Must be of length block_size().

Definition at line 47 of file block_cipher.h.

Referenced by Botan::aont_package(), Botan::aont_unpackage(), Botan::OFB::cipher(), Botan::DESX::encrypt_n(), Botan::CFB_Encryption::set_iv(), Botan::OFB::set_iv(), Botan::XTS_Encryption::set_iv(), Botan::CFB_Decryption::set_iv(), and Botan::XTS_Decryption::set_iv().

48  { encrypt_n(in, out, 1); }
virtual void encrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::BlockCipher::encrypt ( byte  block[]) const
inlineinherited

Encrypt a block.

Parameters
blockthe plaintext block to be encrypted Must be of length block_size(). Will hold the result when the function has finished.

Definition at line 66 of file block_cipher.h.

66 { encrypt_n(block, block, 1); }
virtual void encrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::MISTY1::encrypt_n ( const byte  in[],
byte  out[],
size_t  blocks 
) const
virtual

Encrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)
blocksthe number of blocks to process

Implements Botan::BlockCipher.

Definition at line 105 of file misty1.cpp.

References Botan::Block_Cipher_Fixed_Params< 8, 16 >::BLOCK_SIZE, Botan::load_be< u16bit >(), and Botan::store_be().

106  {
107  for(size_t i = 0; i != blocks; ++i)
108  {
109  u16bit B0 = load_be<u16bit>(in, 0);
110  u16bit B1 = load_be<u16bit>(in, 1);
111  u16bit B2 = load_be<u16bit>(in, 2);
112  u16bit B3 = load_be<u16bit>(in, 3);
113 
114  for(size_t j = 0; j != 12; j += 3)
115  {
116  const u16bit* RK = &EK[8 * j];
117 
118  B1 ^= B0 & RK[0];
119  B0 ^= B1 | RK[1];
120  B3 ^= B2 & RK[2];
121  B2 ^= B3 | RK[3];
122 
123  u32bit T0, T1;
124 
125  T0 = FI(B0 ^ RK[ 4], RK[ 5], RK[ 6]) ^ B1;
126  T1 = FI(B1 ^ RK[ 7], RK[ 8], RK[ 9]) ^ T0;
127  T0 = FI(T0 ^ RK[10], RK[11], RK[12]) ^ T1;
128 
129  B2 ^= T1 ^ RK[13];
130  B3 ^= T0;
131 
132  T0 = FI(B2 ^ RK[14], RK[15], RK[16]) ^ B3;
133  T1 = FI(B3 ^ RK[17], RK[18], RK[19]) ^ T0;
134  T0 = FI(T0 ^ RK[20], RK[21], RK[22]) ^ T1;
135 
136  B0 ^= T1 ^ RK[23];
137  B1 ^= T0;
138  }
139 
140  B1 ^= B0 & EK[96];
141  B0 ^= B1 | EK[97];
142  B3 ^= B2 & EK[98];
143  B2 ^= B3 | EK[99];
144 
145  store_be(out, B2, B3, B0, B1);
146 
147  in += BLOCK_SIZE;
148  out += BLOCK_SIZE;
149  }
150  }
u16bit load_be< u16bit >(const byte in[], size_t off)
Definition: loadstor.h:132
unsigned short u16bit
Definition: types.h:27
void store_be(u16bit in, byte out[2])
Definition: loadstor.h:412
unsigned int u32bit
Definition: types.h:32
Key_Length_Specification Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 >::key_spec ( ) const
inlinevirtualinherited
Returns
object describing limits on key size

Implements Botan::SymmetricAlgorithm.

Definition at line 110 of file block_cipher.h.

111  {
112  return Key_Length_Specification(KMIN, KMAX, KMOD);
113  }
size_t Botan::SymmetricAlgorithm::maximum_keylength ( ) const
inlineinherited
Returns
minimum allowed key length

Definition at line 33 of file sym_algo.h.

34  {
35  return key_spec().maximum_keylength();
36  }
size_t maximum_keylength() const
Definition: key_spec.h:69
virtual Key_Length_Specification key_spec() const =0
size_t Botan::SymmetricAlgorithm::minimum_keylength ( ) const
inlineinherited
Returns
maxmium allowed key length

Definition at line 41 of file sym_algo.h.

42  {
43  return key_spec().minimum_keylength();
44  }
size_t minimum_keylength() const
Definition: key_spec.h:61
virtual Key_Length_Specification key_spec() const =0
std::string Botan::MISTY1::name ( ) const
inlinevirtual
Returns
name of this algorithm

Implements Botan::Algorithm.

Definition at line 25 of file misty1.h.

25 { return "MISTY1"; }
size_t Botan::BlockCipher::parallel_bytes ( ) const
inlineinherited
Returns
prefererred parallelism of this cipher in bytes

Definition at line 35 of file block_cipher.h.

References block_size.

36  {
37  return parallelism() * block_size() * BOTAN_BLOCK_CIPHER_PAR_MULT;
38  }
virtual size_t parallelism() const
Definition: block_cipher.h:30
virtual size_t block_size() const =0
virtual size_t Botan::BlockCipher::parallelism ( ) const
inlinevirtualinherited
Returns
native parallelism of this cipher in blocks

Reimplemented in Botan::AES_256_NI, Botan::AES_192_NI, Botan::AES_128_NI, Botan::IDEA_SSE2, Botan::Noekeon_SIMD, Botan::Serpent_SIMD, and Botan::XTEA_SIMD.

Definition at line 30 of file block_cipher.h.

30 { return 1; }
void Botan::SymmetricAlgorithm::set_key ( const SymmetricKey key)
inlineinherited
void Botan::SymmetricAlgorithm::set_key ( const byte  key[],
size_t  length 
)
inlineinherited

Set the symmetric key of this object.

Parameters
keythe to be set as a byte array.
lengthin bytes of key param

Definition at line 68 of file sym_algo.h.

69  {
70  if(!valid_keylength(length))
71  throw Invalid_Key_Length(name(), length);
72  key_schedule(key, length);
73  }
bool valid_keylength(size_t length) const
Definition: sym_algo.h:51
virtual std::string name() const =0
bool Botan::SymmetricAlgorithm::valid_keylength ( size_t  length) const
inlineinherited

Check whether a given key length is valid for this algorithm.

Parameters
lengththe key length to be checked.
Returns
true if the key length is valid.

Definition at line 51 of file sym_algo.h.

Referenced by Botan::aont_package(), Botan::aont_unpackage(), Botan::HMAC_RNG::HMAC_RNG(), Botan::Lion::Lion(), Botan::Randpool::Randpool(), and Botan::EAX_Base::valid_keylength().

52  {
53  return key_spec().valid_keylength(length);
54  }
bool valid_keylength(size_t length) const
Definition: key_spec.h:51
virtual Key_Length_Specification key_spec() const =0

The documentation for this class was generated from the following files: