There are two phases to the use of DES encryption. The first is the
generation of a I<DES_key_schedule> from a key, the second is the
-actual encryption. A DES key is of type I<DES_cblock>. This type is
+actual encryption. A DES key is of type I<DES_cblock>. This type
consists of 8 bytes with odd parity. The least significant bit in
each byte is the parity bit. The key schedule is an expanded form of
the key; it is used to speed the encryption process.
DES_ede3_cbc_encrypt() implements outer triple CBC DES encryption with
three keys. This means that each DES operation inside the CBC mode is
-an C<C=E(ks3,D(ks2,E(ks1,M)))>. This mode is used by SSL.
+C<C=E(ks3,D(ks2,E(ks1,M)))>. This mode is used by SSL.
The DES_ede2_cbc_encrypt() macro implements two-key Triple-DES by
reusing I<ks1> for the final encryption. C<C=E(ks1,D(ks2,E(ks1,M)))>.
This form of Triple-DES is used by the RSAREF library.
-DES_pcbc_encrypt() encrypt/decrypts using the propagating cipher block
+DES_pcbc_encrypt() encrypts/decrypts using the propagating cipher block
chaining mode used by Kerberos v4. Its parameters are the same as
DES_ncbc_encrypt().
-DES_cfb_encrypt() encrypt/decrypts using cipher feedback mode. This
-method takes an array of characters as input and outputs and array of
+DES_cfb_encrypt() encrypts/decrypts using cipher feedback mode. This
+method takes an array of characters as input and outputs an array of
characters. It does not require any padding to 8 character groups.
Note: the I<ivec> variable is changed and the new changed value needs to
be passed to the next call to this function. Since this function runs
a complete DES ECB encryption per I<numbits>, this function is only
-suggested for use when sending small numbers of characters.
+suggested for use when sending a small number of characters.
DES_cfb64_encrypt()
-implements CFB mode of DES with 64bit feedback. Why is this
+implements CFB mode of DES with 64-bit feedback. Why is this
useful you ask? Because this routine will allow you to encrypt an
-arbitrary number of bytes, no 8 byte padding. Each call to this
+arbitrary number of bytes, without 8 byte padding. Each call to this
routine will encrypt the input bytes to output and then update ivec
and num. num contains 'how far' we are though ivec. If this does
-not make much sense, read more about cfb mode of DES :-).
+not make much sense, read more about CFB mode of DES.
DES_ede3_cfb64_encrypt() and DES_ede2_cfb64_encrypt() is the same as
DES_cfb64_encrypt() except that Triple-DES is used.
DES_ofb_encrypt() encrypts using output feedback mode. This method
-takes an array of characters as input and outputs and array of
+takes an array of characters as input and outputs an array of
characters. It does not require any padding to 8 character groups.
Note: the I<ivec> variable is changed and the new changed value needs to
be passed to the next call to this function. Since this function runs
-a complete DES ECB encryption per numbits, this function is only
-suggested for use when sending small numbers of characters.
+a complete DES ECB encryption per I<numbits>, this function is only
+suggested for use when sending a small number of characters.
DES_ofb64_encrypt() is the same as DES_cfb64_encrypt() using Output
Feed Back mode.
DES_fcrypt() is a fast version of the Unix crypt(3) function. This
version takes only a small amount of space relative to other fast
-crypt() implementations. This is different to the normal crypt in
+crypt() implementations. This is different to the normal crypt() in
that the third parameter is the buffer that the return value is
written into. It needs to be at least 14 bytes long. This function
-is thread safe, unlike the normal crypt.
+is thread safe, unlike the normal crypt().
DES_crypt() is a faster replacement for the normal system crypt().
This function calls DES_fcrypt() with a static array passed as the
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