=head1 NAME
-des_random_key, des_set_key, des_key_sched, des_set_key_checked,
-des_set_key_unchecked, des_set_odd_parity, des_is_weak_key,
-des_ecb_encrypt, des_ecb2_encrypt, des_ecb3_encrypt, des_ncbc_encrypt,
-des_cfb_encrypt, des_ofb_encrypt, des_pcbc_encrypt, des_cfb64_encrypt,
-des_ofb64_encrypt, des_xcbc_encrypt, des_ede2_cbc_encrypt,
-des_ede2_cfb64_encrypt, des_ede2_ofb64_encrypt, des_ede3_cbc_encrypt,
-des_ede3_cbcm_encrypt, des_ede3_cfb64_encrypt, des_ede3_ofb64_encrypt,
-des_read_password, des_read_2passwords, des_read_pw_string,
-des_cbc_cksum, des_quad_cksum, des_string_to_key, des_string_to_2keys,
-des_fcrypt, des_crypt, des_enc_read, des_enc_write - DES encryption
+DES_random_key, DES_set_key, DES_key_sched, DES_set_key_checked,
+DES_set_key_unchecked, DES_set_odd_parity, DES_is_weak_key,
+DES_ecb_encrypt, DES_ecb2_encrypt, DES_ecb3_encrypt, DES_ncbc_encrypt,
+DES_cfb_encrypt, DES_ofb_encrypt, DES_pcbc_encrypt, DES_cfb64_encrypt,
+DES_ofb64_encrypt, DES_xcbc_encrypt, DES_ede2_cbc_encrypt,
+DES_ede2_cfb64_encrypt, DES_ede2_ofb64_encrypt, DES_ede3_cbc_encrypt,
+DES_ede3_cfb64_encrypt, DES_ede3_ofb64_encrypt,
+DES_cbc_cksum, DES_quad_cksum, DES_string_to_key, DES_string_to_2keys,
+DES_fcrypt, DES_crypt, DES_enc_read, DES_enc_write - DES encryption
=head1 SYNOPSIS
#include <openssl/des.h>
- void des_random_key(des_cblock *ret);
+ void DES_random_key(DES_cblock *ret);
- int des_set_key(const_des_cblock *key, des_key_schedule schedule);
- int des_key_sched(const_des_cblock *key, des_key_schedule schedule);
- int des_set_key_checked(const_des_cblock *key,
- des_key_schedule schedule);
- void des_set_key_unchecked(const_des_cblock *key,
- des_key_schedule schedule);
+ int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule);
+ int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule);
+ int DES_set_key_checked(const_DES_cblock *key,
+ DES_key_schedule *schedule);
+ void DES_set_key_unchecked(const_DES_cblock *key,
+ DES_key_schedule *schedule);
- void des_set_odd_parity(des_cblock *key);
- int des_is_weak_key(const_des_cblock *key);
+ void DES_set_odd_parity(DES_cblock *key);
+ int DES_is_weak_key(const_DES_cblock *key);
- void des_ecb_encrypt(const_des_cblock *input, des_cblock *output,
- des_key_schedule ks, int enc);
- void des_ecb2_encrypt(const_des_cblock *input, des_cblock *output,
- des_key_schedule ks1, des_key_schedule ks2, int enc);
- void des_ecb3_encrypt(const_des_cblock *input, des_cblock *output,
- des_key_schedule ks1, des_key_schedule ks2,
- des_key_schedule ks3, int enc);
+ void DES_ecb_encrypt(const_DES_cblock *input, DES_cblock *output,
+ DES_key_schedule *ks, int enc);
+ void DES_ecb2_encrypt(const_DES_cblock *input, DES_cblock *output,
+ DES_key_schedule *ks1, DES_key_schedule *ks2, int enc);
+ void DES_ecb3_encrypt(const_DES_cblock *input, DES_cblock *output,
+ DES_key_schedule *ks1, DES_key_schedule *ks2,
+ DES_key_schedule *ks3, int enc);
- void des_ncbc_encrypt(const unsigned char *input, unsigned char *output,
- long length, des_key_schedule schedule, des_cblock *ivec,
+ void DES_ncbc_encrypt(const unsigned char *input, unsigned char *output,
+ long length, DES_key_schedule *schedule, DES_cblock *ivec,
int enc);
- void des_cfb_encrypt(const unsigned char *in, unsigned char *out,
- int numbits, long length, des_key_schedule schedule,
- des_cblock *ivec, int enc);
- void des_ofb_encrypt(const unsigned char *in, unsigned char *out,
- int numbits, long length, des_key_schedule schedule,
- des_cblock *ivec);
- void des_pcbc_encrypt(const unsigned char *input, unsigned char *output,
- long length, des_key_schedule schedule, des_cblock *ivec,
+ void DES_cfb_encrypt(const unsigned char *in, unsigned char *out,
+ int numbits, long length, DES_key_schedule *schedule,
+ DES_cblock *ivec, int enc);
+ void DES_ofb_encrypt(const unsigned char *in, unsigned char *out,
+ int numbits, long length, DES_key_schedule *schedule,
+ DES_cblock *ivec);
+ void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output,
+ long length, DES_key_schedule *schedule, DES_cblock *ivec,
int enc);
- void des_cfb64_encrypt(const unsigned char *in, unsigned char *out,
- long length, des_key_schedule schedule, des_cblock *ivec,
+ void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *schedule, DES_cblock *ivec,
int *num, int enc);
- void des_ofb64_encrypt(const unsigned char *in, unsigned char *out,
- long length, des_key_schedule schedule, des_cblock *ivec,
+ void DES_ofb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *schedule, DES_cblock *ivec,
int *num);
- void des_xcbc_encrypt(const unsigned char *input, unsigned char *output,
- long length, des_key_schedule schedule, des_cblock *ivec,
- const_des_cblock *inw, const_des_cblock *outw, int enc);
-
- void des_ede2_cbc_encrypt(const unsigned char *input,
- unsigned char *output, long length, des_key_schedule ks1,
- des_key_schedule ks2, des_cblock *ivec, int enc);
- void des_ede2_cfb64_encrypt(const unsigned char *in,
- unsigned char *out, long length, des_key_schedule ks1,
- des_key_schedule ks2, des_cblock *ivec, int *num, int enc);
- void des_ede2_ofb64_encrypt(const unsigned char *in,
- unsigned char *out, long length, des_key_schedule ks1,
- des_key_schedule ks2, des_cblock *ivec, int *num);
-
- void des_ede3_cbc_encrypt(const unsigned char *input,
- unsigned char *output, long length, des_key_schedule ks1,
- des_key_schedule ks2, des_key_schedule ks3, des_cblock *ivec,
+ void DES_xcbc_encrypt(const unsigned char *input, unsigned char *output,
+ long length, DES_key_schedule *schedule, DES_cblock *ivec,
+ const_DES_cblock *inw, const_DES_cblock *outw, int enc);
+
+ void DES_ede2_cbc_encrypt(const unsigned char *input,
+ unsigned char *output, long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_cblock *ivec, int enc);
+ void DES_ede2_cfb64_encrypt(const unsigned char *in,
+ unsigned char *out, long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_cblock *ivec, int *num, int enc);
+ void DES_ede2_ofb64_encrypt(const unsigned char *in,
+ unsigned char *out, long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_cblock *ivec, int *num);
+
+ void DES_ede3_cbc_encrypt(const unsigned char *input,
+ unsigned char *output, long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_key_schedule *ks3, DES_cblock *ivec,
int enc);
- void des_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
- long length, des_key_schedule ks1, des_key_schedule ks2,
- des_key_schedule ks3, des_cblock *ivec1, des_cblock *ivec2,
- int enc);
- void des_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out,
- long length, des_key_schedule ks1, des_key_schedule ks2,
- des_key_schedule ks3, des_cblock *ivec, int *num, int enc);
- void des_ede3_ofb64_encrypt(const unsigned char *in, unsigned char *out,
- long length, des_key_schedule ks1,
- des_key_schedule ks2, des_key_schedule ks3,
- des_cblock *ivec, int *num);
-
- int des_read_password(des_cblock *key, const char *prompt, int verify);
- int des_read_2passwords(des_cblock *key1, des_cblock *key2,
- const char *prompt, int verify);
- int des_read_pw_string(char *buf, int length, const char *prompt,
- int verify);
-
- DES_LONG des_cbc_cksum(const unsigned char *input, des_cblock *output,
- long length, des_key_schedule schedule,
- const_des_cblock *ivec);
- DES_LONG des_quad_cksum(const unsigned char *input, des_cblock output[],
- long length, int out_count, des_cblock *seed);
- void des_string_to_key(const char *str, des_cblock *key);
- void des_string_to_2keys(const char *str, des_cblock *key1,
- des_cblock *key2);
-
- char *des_fcrypt(const char *buf, const char *salt, char *ret);
- char *des_crypt(const char *buf, const char *salt);
- char *crypt(const char *buf, const char *salt);
-
- int des_enc_read(int fd, void *buf, int len, des_key_schedule sched,
- des_cblock *iv);
- int des_enc_write(int fd, const void *buf, int len,
- des_key_schedule sched, des_cblock *iv);
+ void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *ks1, DES_key_schedule *ks2,
+ DES_key_schedule *ks3, DES_cblock *ivec, int *num, int enc);
+ void DES_ede3_ofb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_key_schedule *ks3,
+ DES_cblock *ivec, int *num);
+
+ DES_LONG DES_cbc_cksum(const unsigned char *input, DES_cblock *output,
+ long length, DES_key_schedule *schedule,
+ const_DES_cblock *ivec);
+ DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[],
+ long length, int out_count, DES_cblock *seed);
+ void DES_string_to_key(const char *str, DES_cblock *key);
+ void DES_string_to_2keys(const char *str, DES_cblock *key1,
+ DES_cblock *key2);
+
+ char *DES_fcrypt(const char *buf, const char *salt, char *ret);
+ char *DES_crypt(const char *buf, const char *salt);
+
+ int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
+ DES_cblock *iv);
+ int DES_enc_write(int fd, const void *buf, int len,
+ DES_key_schedule *sched, DES_cblock *iv);
=head1 DESCRIPTION
algorithm.
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
+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
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_random_key() generates a random key. The PRNG must be seeded
-prior to using this function (see L<rand(3)|rand(3)>; for backward
-compatibility the function des_random_seed() is available as well).
-If the PRNG could not generate a secure key, 0 is returned. In
-earlier versions of the library, des_random_key() did not generate
-secure keys.
+DES_random_key() generates a random key. The PRNG must be seeded
+prior to using this function (see L<rand(3)|rand(3)>). If the PRNG
+could not generate a secure key, 0 is returned.
Before a DES key can be used, it must be converted into the
-architecture dependent I<des_key_schedule> via the
-des_set_key_checked() or des_set_key_unchecked() function.
+architecture dependent I<DES_key_schedule> via the
+DES_set_key_checked() or DES_set_key_unchecked() function.
-des_set_key_checked() will check that the key passed is of odd parity
+DES_set_key_checked() will check that the key passed is of odd parity
and is not a week or semi-weak key. If the parity is wrong, then -1
is returned. If the key is a weak key, then -2 is returned. If an
error is returned, the key schedule is not generated.
-des_set_key() (called des_key_sched() in the MIT library) works like
-des_set_key_checked() if the I<des_check_key> flag is non-zero,
-otherwise like des_set_key_unchecked(). These functions are available
+DES_set_key() works like
+DES_set_key_checked() if the I<DES_check_key> flag is non-zero,
+otherwise like DES_set_key_unchecked(). These functions are available
for compatibility; it is recommended to use a function that does not
depend on a global variable.
-des_set_odd_parity() (called des_fixup_key_parity() in the MIT
-library) sets the parity of the passed I<key> to odd.
+DES_set_odd_parity() sets the parity of the passed I<key> to odd.
-des_is_weak_key() returns 1 is the passed key is a weak key, 0 if it
-is ok. The probability that a randomly generated key is weak is
-1/2^52, so it is not really worth checking for them.
+DES_is_weak_key() returns 1 if the passed key is a weak key, 0 if it
+is ok.
The following routines mostly operate on an input and output stream of
-I<des_cblock>s.
+I<DES_cblock>s.
-des_ecb_encrypt() is the basic DES encryption routine that encrypts or
-decrypts a single 8-byte I<des_cblock> in I<electronic code book>
+DES_ecb_encrypt() is the basic DES encryption routine that encrypts or
+decrypts a single 8-byte I<DES_cblock> in I<electronic code book>
(ECB) mode. It always transforms the input data, pointed to by
I<input>, into the output data, pointed to by the I<output> argument.
If the I<encrypt> argument is non-zero (DES_ENCRYPT), the I<input>
(cleartext) is encrypted in to the I<output> (ciphertext) using the
key_schedule specified by the I<schedule> argument, previously set via
-I<des_set_key>. If I<encrypt> is zero (DES_DECRYPT), the I<input> (now
+I<DES_set_key>. If I<encrypt> is zero (DES_DECRYPT), the I<input> (now
ciphertext) is decrypted into the I<output> (now cleartext). Input
-and output may overlap. des_ecb_encrypt() does not return a value.
+and output may overlap. DES_ecb_encrypt() does not return a value.
-des_ecb3_encrypt() encrypts/decrypts the I<input> block by using
+DES_ecb3_encrypt() encrypts/decrypts the I<input> block by using
three-key Triple-DES encryption in ECB mode. This involves encrypting
the input with I<ks1>, decrypting with the key schedule I<ks2>, and
then encrypting with I<ks3>. This routine greatly reduces the chances
I<ks2> and I<ks3> are the same, it is equivalent to just encryption
using ECB mode and I<ks1> as the key.
-The macro des_ecb2_encrypt() is provided to perform two-key Triple-DES
+The macro DES_ecb2_encrypt() is provided to perform two-key Triple-DES
encryption by using I<ks1> for the final encryption.
-des_ncbc_encrypt() encrypts/decrypts using the I<cipher-block-chaining>
+DES_ncbc_encrypt() encrypts/decrypts using the I<cipher-block-chaining>
(CBC) mode of DES. If the I<encrypt> argument is non-zero, the
routine cipher-block-chain encrypts the cleartext data pointed to by
the I<input> argument into the ciphertext pointed to by the I<output>
last block is copied to a temporary area and zero filled. The output
is always an integral multiple of eight bytes.
-des_xcbc_encrypt() is RSA's DESX mode of DES. It uses I<inw> and
+DES_xcbc_encrypt() is RSA's DESX mode of DES. It uses I<inw> and
I<outw> to 'whiten' the encryption. I<inw> and I<outw> are secret
(unlike the iv) and are as such, part of the key. So the key is sort
of 24 bytes. This is much better than CBC DES.
-des_ede3_cbc_encrypt() implements outer triple CBC DES encryption with
+DES_ede3_cbc_encrypt() implements outer triple CBC DES encryption with
three keys. This means that each DES operation inside the CBC mode is
-really an C<C=E(ks3,D(ks2,E(ks1,M)))>. This mode is used by SSL.
+an 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
+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() encrypt/decrypts using the propagating cipher block
chaining mode used by Kerberos v4. Its parameters are the same as
-des_ncbc_encrypt().
+DES_ncbc_encrypt().
-des_cfb_encrypt() encrypt/decrypts using cipher feedback mode. This
+DES_cfb_encrypt() encrypt/decrypts using cipher feedback mode. This
method takes an array of characters as input and outputs and 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
a complete DES ECB encryption per I<numbits>, this function is only
suggested for use when sending small numbers of characters.
-des_cfb64_encrypt()
+DES_cfb64_encrypt()
implements CFB mode of DES with 64bit 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
and num. num contains 'how far' we are though ivec. If this does
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_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
+DES_ofb_encrypt() encrypts using output feedback mode. This method
takes an array of characters as input and outputs and 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
a complete DES ECB encryption per numbits, this function is only
suggested for use when sending small numbers of characters.
-des_ofb64_encrypt() is the same as des_cfb64_encrypt() using Output
+DES_ofb64_encrypt() is the same as DES_cfb64_encrypt() using Output
Feed Back mode.
-des_ede3_ofb64_encrypt() and des_ede2_ofb64_encrypt() is the same as
-des_ofb64_encrypt(), using Triple-DES.
+DES_ede3_ofb64_encrypt() and DES_ede2_ofb64_encrypt() is the same as
+DES_ofb64_encrypt(), using Triple-DES.
The following functions are included in the DES library for
-compatibility with the MIT Kerberos library. des_read_pw_string()
-is also available under the name EVP_read_pw_string().
-
-des_read_pw_string() writes the string specified by I<prompt> to
-standard output, turns echo off and reads in input string from the
-terminal. The string is returned in I<buf>, which must have space for
-at least I<length> bytes. If I<verify> is set, the user is asked for
-the password twice and unless the two copies match, an error is
-returned. A return code of -1 indicates a system error, 1 failure due
-to use interaction, and 0 is success.
-
-des_read_password() does the same and converts the password to a DES
-key by calling des_string_to_key(); des_read_2password() operates in
-the same way as des_read_password() except that it generates two keys
-by using the des_string_to_2key() function. des_string_to_key() is
-available for backward compatibility with the MIT library. New
-applications should use a cryptographic hash function. The same
-applies for des_string_to_2key().
-
-des_cbc_cksum() produces an 8 byte checksum based on the input stream
+compatibility with the MIT Kerberos library.
+
+DES_cbc_cksum() produces an 8 byte checksum based on the input stream
(via CBC encryption). The last 4 bytes of the checksum are returned
and the complete 8 bytes are placed in I<output>. This function is
used by Kerberos v4. Other applications should use
L<EVP_DigestInit(3)|EVP_DigestInit(3)> etc. instead.
-des_quad_cksum() is a Kerberos v4 function. It returns a 4 byte
+DES_quad_cksum() is a Kerberos v4 function. It returns a 4 byte
checksum from the input bytes. The algorithm can be iterated over the
input, depending on I<out_count>, 1, 2, 3 or 4 times. If I<output> is
non-NULL, the 8 bytes generated by each pass are written into
The following are DES-based transformations:
-des_fcrypt() is a fast version of the Unix crypt(3) function. This
+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
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.
-des_crypt() is a faster replacement for the normal system crypt().
-This function calls des_fcrypt() with a static array passed as the
+DES_crypt() is a faster replacement for the normal system crypt().
+This function calls DES_fcrypt() with a static array passed as the
third parameter. This emulates the normal non-thread safe semantics
of crypt(3).
-des_enc_write() writes I<len> bytes to file descriptor I<fd> from
+DES_enc_write() writes I<len> bytes to file descriptor I<fd> from
buffer I<buf>. The data is encrypted via I<pcbc_encrypt> (default)
using I<sched> for the key and I<iv> as a starting vector. The actual
data send down I<fd> consists of 4 bytes (in network byte order)
data then follows, padded with random data out to a multiple of 8
bytes.
-des_enc_read() is used to read I<len> bytes from file descriptor
+DES_enc_read() is used to read I<len> bytes from file descriptor
I<fd> into buffer I<buf>. The data being read from I<fd> is assumed to
-have come from des_enc_write() and is decrypted using I<sched> for
+have come from DES_enc_write() and is decrypted using I<sched> for
the key schedule and I<iv> for the initial vector.
-B<Warning:> The data format used by des_enc_write() and des_enc_read()
+B<Warning:> The data format used by DES_enc_write() and DES_enc_read()
has a cryptographic weakness: When asked to write more than MAXWRITE
-bytes, des_enc_write() will split the data into several chunks that
+bytes, DES_enc_write() will split the data into several chunks that
are all encrypted using the same IV. So don't use these functions
unless you are sure you know what you do (in which case you might not
want to use them anyway). They cannot handle non-blocking sockets.
-des_enc_read() uses an internal state and thus cannot be used on
+DES_enc_read() uses an internal state and thus cannot be used on
multiple files.
-I<des_rw_mode> is used to specify the encryption mode to use with
-des_enc_read() and des_end_write(). If set to I<DES_PCBC_MODE> (the
-default), des_pcbc_encrypt is used. If set to I<DES_CBC_MODE>
-des_cbc_encrypt is used.
-
-=head1 NOTES
-
-Single-key DES is insecure due to its short key size. ECB mode is
-not suitable for most applications; see L<des_modes(7)|des_modes(7)>.
-
-The L<evp(3)|evp(3)> library provides higher-level encryption functions.
+I<DES_rw_mode> is used to specify the encryption mode to use with
+DES_enc_read() and DES_end_write(). If set to I<DES_PCBC_MODE> (the
+default), DES_pcbc_encrypt is used. If set to I<DES_CBC_MODE>
+DES_cbc_encrypt is used.
=head1 BUGS
-des_3cbc_encrypt() is flawed and must not be used in applications.
+DES_3cbc_encrypt() is flawed and must not be used in applications.
-des_cbc_encrypt() does not modify B<ivec>; use des_ncbc_encrypt()
+DES_cbc_encrypt() does not modify B<ivec>; use DES_ncbc_encrypt()
instead.
-des_cfb_encrypt() and des_ofb_encrypt() operates on input of 8 bits.
+DES_cfb_encrypt() and DES_ofb_encrypt() operates on input of 8 bits.
What this means is that if you set numbits to 12, and length to 2, the
first 12 bits will come from the 1st input byte and the low half of
the second input byte. The second 12 bits will have the low 8 bits
and because once you get into pulling bytes input bytes apart things
get ugly!
-des_read_pw_string() is the most machine/OS dependent function and
-normally generates the most problems when porting this code.
+DES_string_to_key() is available for backward compatibility with the
+MIT library. New applications should use a cryptographic hash function.
+The same applies for DES_string_to_2key().
=head1 CONFORMING TO
The B<des> library was written to be source code compatible with
the MIT Kerberos library.
-=head1 SEE ALSO
-
-crypt(3), L<des_modes(7)|des_modes(7)>, L<evp(3)|evp(3)>, L<rand(3)|rand(3)>
-
-=head1 HISTORY
-
-des_cbc_cksum(), des_cbc_encrypt(), des_ecb_encrypt(),
-des_is_weak_key(), des_key_sched(), des_pcbc_encrypt(),
-des_quad_cksum(), des_random_key(), des_read_password() and
-des_string_to_key() are available in the MIT Kerberos library;
-des_check_key_parity(), des_fixup_key_parity() and des_is_weak_key()
-are available in newer versions of that library.
-
-des_set_key_checked() and des_set_key_unchecked() were added in
-OpenSSL 0.9.5.
+=head1 NOTES
-des_generate_random_block(), des_init_random_number_generator(),
-des_new_random_key(), des_set_random_generator_seed() and
-des_set_sequence_number() and des_rand_data() are used in newer
-versions of Kerberos but are not implemented here.
+Applications should use the higher level functions
+L<EVP_EncryptInit(3)|EVP_EncryptInit(3)> etc. instead of calling these
+functions directly.
-des_random_key() generated cryptographically weak random data in
-SSLeay and in OpenSSL prior version 0.9.5, as well as in the original
-MIT library.
+Single-key DES is insecure due to its short key size. ECB mode is
+not suitable for most applications; see L<des_modes(7)|des_modes(7)>.
=head1 AUTHOR
Eric Young (eay@cryptsoft.com). Modified for the OpenSSL project
(http://www.openssl.org).
+=head1 SEE ALSO
+
+L<des_modes(7)|des_modes(7)>,
+L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>
+
=cut
projects / openssl.git / blobdiff