Botan  1.10.9
Public Member Functions | List of all members
Botan::SSL3_PRF Class Reference

#include <prf_ssl3.h>

Inheritance diagram for Botan::SSL3_PRF:
Botan::KDF Botan::Algorithm

Public Member Functions

void clear ()
 
KDFclone () const
 
SecureVector< bytederive (size_t, const byte[], size_t, const byte[], size_t) const
 
SecureVector< bytederive_key (size_t key_len, const MemoryRegion< byte > &secret, const std::string &salt="") const
 
SecureVector< bytederive_key (size_t key_len, const MemoryRegion< byte > &secret, const MemoryRegion< byte > &salt) const
 
SecureVector< bytederive_key (size_t key_len, const MemoryRegion< byte > &secret, const byte salt[], size_t salt_len) const
 
SecureVector< bytederive_key (size_t key_len, const byte secret[], size_t secret_len, const std::string &salt="") const
 
SecureVector< bytederive_key (size_t key_len, const byte secret[], size_t secret_len, const byte salt[], size_t salt_len) const
 
std::string name () const
 

Detailed Description

PRF used in SSLv3

Definition at line 18 of file prf_ssl3.h.

Member Function Documentation

void Botan::KDF::clear ( )
inlinevirtualinherited

Zeroize internal state

Implements Botan::Algorithm.

Definition at line 81 of file kdf.h.

81 {}
KDF* Botan::SSL3_PRF::clone ( ) const
inlinevirtual

Implements Botan::KDF.

Definition at line 25 of file prf_ssl3.h.

25 { return new SSL3_PRF; }
SecureVector< byte > Botan::SSL3_PRF::derive ( size_t  key_len,
const byte  secret[],
size_t  secret_len,
const byte  seed[],
size_t  seed_len 
) const
virtual

Implements Botan::KDF.

Definition at line 50 of file prf_ssl3.cpp.

References Botan::OctetString::bits_of(), and Botan::MD5::output_length().

53  {
54  if(key_len > 416)
55  throw Invalid_Argument("SSL3_PRF: Requested key length is too large");
56 
57  MD5 md5;
58  SHA_160 sha1;
59 
60  OctetString output;
61 
62  int counter = 0;
63  while(key_len)
64  {
65  const size_t produce = std::min<size_t>(key_len, md5.output_length());
66 
67  output = output + next_hash(counter++, produce, md5, sha1,
68  secret, secret_len, seed, seed_len);
69 
70  key_len -= produce;
71  }
72 
73  return output.bits_of();
74  }
std::invalid_argument Invalid_Argument
Definition: exceptn.h:20
SecureVector< byte > Botan::KDF::derive_key ( size_t  key_len,
const MemoryRegion< byte > &  secret,
const std::string &  salt = "" 
) const
inherited

Derive a key

Parameters
key_lenthe desired output length in bytes
secretthe secret input
salta diversifier

Definition at line 15 of file kdf.cpp.

References Botan::MemoryRegion< T >::size().

Referenced by Botan::KDF::derive_key(), and Botan::PK_Key_Agreement::derive_key().

18  {
19  return derive_key(key_len, &secret[0], secret.size(),
20  reinterpret_cast<const byte*>(salt.data()),
21  salt.length());
22  }
unsigned char byte
Definition: types.h:22
SecureVector< byte > derive_key(size_t key_len, const MemoryRegion< byte > &secret, const std::string &salt="") const
Definition: kdf.cpp:15
size_t size() const
Definition: secmem.h:29
SecureVector< byte > Botan::KDF::derive_key ( size_t  key_len,
const MemoryRegion< byte > &  secret,
const MemoryRegion< byte > &  salt 
) const
inherited

Derive a key

Parameters
key_lenthe desired output length in bytes
secretthe secret input
salta diversifier

Definition at line 38 of file kdf.cpp.

References Botan::KDF::derive_key(), and Botan::MemoryRegion< T >::size().

41  {
42  return derive_key(key_len, &secret[0], secret.size(),
43  &salt[0], salt.size());
44  }
SecureVector< byte > derive_key(size_t key_len, const MemoryRegion< byte > &secret, const std::string &salt="") const
Definition: kdf.cpp:15
size_t size() const
Definition: secmem.h:29
SecureVector< byte > Botan::KDF::derive_key ( size_t  key_len,
const MemoryRegion< byte > &  secret,
const byte  salt[],
size_t  salt_len 
) const
inherited

Derive a key

Parameters
key_lenthe desired output length in bytes
secretthe secret input
salta diversifier
salt_lensize of salt in bytes

Definition at line 27 of file kdf.cpp.

References Botan::KDF::derive_key(), and Botan::MemoryRegion< T >::size().

30  {
31  return derive_key(key_len, &secret[0], secret.size(),
32  salt, salt_len);
33  }
SecureVector< byte > derive_key(size_t key_len, const MemoryRegion< byte > &secret, const std::string &salt="") const
Definition: kdf.cpp:15
size_t size() const
Definition: secmem.h:29
SecureVector< byte > Botan::KDF::derive_key ( size_t  key_len,
const byte  secret[],
size_t  secret_len,
const std::string &  salt = "" 
) const
inherited

Derive a key

Parameters
key_lenthe desired output length in bytes
secretthe secret input
secret_lensize of secret in bytes
salta diversifier

Definition at line 49 of file kdf.cpp.

References Botan::KDF::derive_key().

52  {
53  return derive_key(key_len, secret, secret_len,
54  reinterpret_cast<const byte*>(salt.data()),
55  salt.length());
56  }
SecureVector< byte > derive_key(size_t key_len, const MemoryRegion< byte > &secret, const std::string &salt="") const
Definition: kdf.cpp:15
SecureVector< byte > Botan::KDF::derive_key ( size_t  key_len,
const byte  secret[],
size_t  secret_len,
const byte  salt[],
size_t  salt_len 
) const
inherited

Derive a key

Parameters
key_lenthe desired output length in bytes
secretthe secret input
secret_lensize of secret in bytes
salta diversifier
salt_lensize of salt in bytes

Definition at line 61 of file kdf.cpp.

64  {
65  return derive(key_len, secret, secret_len, salt, salt_len);
66  }
std::string Botan::SSL3_PRF::name ( ) const
inlinevirtual
Returns
name of this algorithm

Implements Botan::Algorithm.

Definition at line 24 of file prf_ssl3.h.

24 { return "SSL3-PRF"; }

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