Version 5.0 The LEDA User Manual

CryptByteString
s(uint16 idx start, uint16 idx end)
returns the substring s[idx start], . . . , s[idx end].
CryptByteString s.hash(uint16 num iterations = 1)
computes a hash of s, num iterations specifies
how often the hash function is applied.
string s.to hex string( ) computes a hexadecimal reprasentation of s, each
byte is represented by two hex-digits.
string s.to string( ) converts s into a string.
CryptByteString
CryptByteString
CryptByteString
void
const CryptByteString& x + const CryptByteString& y
returns the concatenation of x and y.
CryptByteString :: from hex string(const char ∗ hex str)
creates a CryptByteString from a string of hexdigits.
CryptByteString :: from string(const char ∗ str)
converts the string str into a CryptByteString.
CryptByteString :: wipe memory(void ∗ mem, uint32 sz)
wipes out sz bytes starting at the address given
by mem.
10.2 Key for Cryptography ( CryptKey )
1. Definition
Instances of the class CryptKey store keys for cryptographic algorithms. CryptKey is
derived from CryptByteString and hence, its instances also wipe out their memory upon
destruction. Apart from the operations of its base class CryptKey provides some static
operations which can be helpful for key generation.
#include < LEDA/coding/crypt key.h >
2. Creation
CryptKey k;
creates an empty key.
CryptKey k(uint16 size);
creates a key of the given size. All bytes in k are set to zero.