1 /* crypto/des/cbc3_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 /* HAS BUGS! DON'T USE - this is only present for use in des.c */
62 void DES_3cbc_encrypt(DES_cblock *input, DES_cblock *output, long length,
63 DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock *iv1,
64 DES_cblock *iv2, int enc)
66 int off=((int)length-1)/8;
67 long l8=((length+7)/8)*8;
70 if (enc == DES_ENCRYPT)
72 DES_cbc_encrypt((unsigned char*)input,
73 (unsigned char*)output,length,&ks1,iv1,enc);
74 if (length >= sizeof(DES_cblock))
75 memcpy(niv1,output[off],sizeof(DES_cblock));
76 DES_cbc_encrypt((unsigned char*)output,
77 (unsigned char*)output,l8,&ks2,iv1,!enc);
78 DES_cbc_encrypt((unsigned char*)output,
79 (unsigned char*)output,l8,&ks1,iv2,enc);
80 if (length >= sizeof(DES_cblock))
81 memcpy(niv2,output[off],sizeof(DES_cblock));
85 if (length >= sizeof(DES_cblock))
86 memcpy(niv2,input[off],sizeof(DES_cblock));
87 DES_cbc_encrypt((unsigned char*)input,
88 (unsigned char*)output,l8,&ks1,iv2,enc);
89 DES_cbc_encrypt((unsigned char*)output,
90 (unsigned char*)output,l8,&ks2,iv1,!enc);
91 if (length >= sizeof(DES_cblock))
92 memcpy(niv1,output[off],sizeof(DES_cblock));
93 DES_cbc_encrypt((unsigned char*)output,
94 (unsigned char*)output,length,&ks1,iv1,enc);
96 memcpy(*iv1,niv1,sizeof(DES_cblock));
97 memcpy(*iv2,niv2,sizeof(DES_cblock));