Name
des_encipher
Synopsis
void des_encipher(const unsigned char *plaintext, unsigned char *ciphertext, unsigned char *key);
Return Value
None.
Description
Uses DES to encipher one 64-bit block of plaintext specified
by plaintext. Specify the 64-bit key in
key. (Recall that every eighth bit of
this key is ignored, resulting in a 56-bit key.) The 64-bit block
of ciphertext is returned in
ciphertext. It is the responsibility of
the caller to manage the storage required in
ciphertext. To encipher a large buffer
of data, call des_encipher in accordance with
a block cipher mode (see the example later in this chapter). For
efficiency, des_encipher can reuse the
subkeys computed during a previous call. To enable this, set
key to NULL in subsequent calls.
Complexity
O (1)
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