Implementation of the Cipher Block Chaining (CBC) mode for 128-bit block ciphers. More...
#include <CBC.h>
Public Member Functions | |
| CBC () | |
| Constructs a new CBC object for the block cipher T. | |
 Public Member Functions inherited from CBCCommon | |
| virtual | ~CBCCommon () |
| Destroys this cipher object after clearing sensitive information. | |
| size_t | keySize () const |
| Default size of the key for this cipher, in bytes. More... | |
| size_t | ivSize () const |
| Size of the initialization vector for this cipher, in bytes. More... | |
| bool | setKey (const uint8_t *key, size_t len) |
| Sets the key to use for future encryption and decryption operations. More... | |
| bool | setIV (const uint8_t *iv, size_t len) |
| Sets the initialization vector to use for future encryption and decryption operations. More... | |
| void | encrypt (uint8_t *output, const uint8_t *input, size_t len) |
| Encrypts an input buffer and writes the ciphertext to an output buffer. More... | |
| void | decrypt (uint8_t *output, const uint8_t *input, size_t len) |
| Decrypts an input buffer and writes the plaintext to an output buffer. More... | |
| void | clear () |
| Clears all security-sensitive state from this cipher. More... | |
| Public Member Functions inherited from Cipher | |
| Cipher () | |
| Constructs a new cipher object. | |
| virtual | ~Cipher () |
| Destroys this cipher object. More... | |
Additional Inherited Members | |
| Protected Member Functions inherited from CBCCommon | |
| CBCCommon () | |
| Constructs a new cipher in CBC mode. More... | |
| void | setBlockCipher (BlockCipher *cipher) |
| Sets the block cipher to use for this CBC object. More... | |
Detailed Description
template<typename T>
class CBC< T >
Implementation of the Cipher Block Chaining (CBC) mode for 128-bit block ciphers.
The template parameter T must be a concrete subclass of BlockCipher indicating the specific block cipher to use. T must have a block size of 16 bytes (128 bits).
For example, the following creates a CBC object using AES192 as the underlying cipher:
Decryption is similar:
The size of the ciphertext will always be the same as the size of the plaintext. Also, the length of the plaintext/ciphertext must be a multiple of 16. Extra bytes are ignored and not encrypted. The caller is responsible for padding the underlying data to a multiple of 16 using an appropriate padding scheme for the application.
Reference: http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation
The documentation for this class was generated from the following files:
