Interface for public-key encryptors and decryptors. More...
Inheritance diagram for PK_CryptoSystem:
Public Member Functions | |
| virtual size_t | MaxPlaintextLength (size_t ciphertextLength) const =0 |
| Provides the maximum length of plaintext for a given ciphertext length. More... | |
| virtual size_t | CiphertextLength (size_t plaintextLength) const =0 |
| Calculate the length of ciphertext given length of plaintext. More... | |
| virtual bool | ParameterSupported (const char *name) const =0 |
| Determines whether this object supports the use of a named parameter. More... | |
| virtual size_t | FixedCiphertextLength () const |
| Provides the fixed ciphertext length, if one exists. More... | |
| virtual size_t | FixedMaxPlaintextLength () const |
| Provides the maximum plaintext length given a fixed ciphertext length. More... | |
Detailed Description
Interface for public-key encryptors and decryptors.
This class provides an interface common to encryptors and decryptors for querying their plaintext and ciphertext lengths.
Definition at line 2665 of file cryptlib.h.
Member Function Documentation
◆ MaxPlaintextLength()
|
pure virtual |
Provides the maximum length of plaintext for a given ciphertext length.
- Returns
- the maximum size of the plaintext, in bytes
This function returns 0 if ciphertextLength is not valid (too long or too short).
◆ CiphertextLength()
|
pure virtual |
Calculate the length of ciphertext given length of plaintext.
- Returns
- the maximum size of the ciphertext, in bytes
This function returns 0 if plaintextLength is not valid (too long).
◆ ParameterSupported()
|
pure virtual |
Determines whether this object supports the use of a named parameter.
- Parameters
-
name the name of the parameter
- Returns
- true if the parameter name is supported, false otherwise
Some possible parameter names: EncodingParameters(), KeyDerivationParameters() and others Parameters listed in argnames.h
◆ FixedCiphertextLength()
|
inlinevirtual |
Provides the fixed ciphertext length, if one exists.
- Returns
- the fixed ciphertext length if one exists, otherwise 0
"Fixed" here means length of ciphertext does not depend on length of plaintext. In this case, it usually does depend on the key length.
Definition at line 2691 of file cryptlib.h.
◆ FixedMaxPlaintextLength()
|
inlinevirtual |
Provides the maximum plaintext length given a fixed ciphertext length.
- Returns
- maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0.
FixedMaxPlaintextLength(0 returns the maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0.
Definition at line 2698 of file cryptlib.h.
The documentation for this class was generated from the following file:
