/*
* ppp-des.c - PPP/DES implementation for MS-CHAP and EAP SRP-SHA1
*
* Extracted from chap_ms.c by James Carlson.
* Added abstraction via PPP_Digest* callbacks by Eivind Næss
*
* Copyright (c) 1995 Eric Rosenquist. All rights reserved.
* Copyright (c) 2022 Eivind Næss. All rights reserved.
* Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name(s) of the authors of this software must not be used to
* endorse or promote products derived from this software without
* prior written permission.
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sections of this code holds different copyright information.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "crypto-priv.h"
#ifdef OPENSSL_HAVE_DES
#include <openssl/evp.h>
#if OPENSSL_VERSION_NUMBER < 0x10100000L
#define EVP_CIPHER_CTX_reset EVP_CIPHER_CTX_cleanup
#endif
static int des_init(PPP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv)
{
if (ctx) {
EVP_CIPHER_CTX *cc = EVP_CIPHER_CTX_new();
if (cc) {
if (key) {
memcpy(ctx->key, key, 8);
}
if (iv) {
memcpy(ctx->iv, iv, 8);
}
if (EVP_CipherInit(cc, EVP_des_ecb(), ctx->key, ctx->iv, ctx->is_encr)) {
if (EVP_CIPHER_CTX_set_padding(cc, 0)) {
ctx->priv = cc;
return 1;
}
}
EVP_CIPHER_CTX_free(cc);
}
}
return 0;
}
static int des_update(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl, const unsigned char *in, int inl)
{
if (ctx) {
return EVP_CipherUpdate((EVP_CIPHER_CTX*) ctx->priv, out, outl, in, inl);
}
return 0;
}
static int des_final(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
if (ctx) {
return EVP_CipherFinal((EVP_CIPHER_CTX*) ctx->priv, out, outl);
}
return 0;
}
static void des_clean(PPP_CIPHER_CTX *ctx)
{
if (ctx->priv) {
EVP_CIPHER_CTX_free((EVP_CIPHER_CTX*) ctx->priv);
ctx->priv = NULL;
}
}
#else
/*
* DES related functions are imported from openssl 3.0 project with the
* follwoing license:
*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
*
https://www.openssl.org/source/license.html
*/
typedef unsigned int DES_LONG;
typedef unsigned char DES_cblock[8];
typedef struct DES_ks {
union {
DES_cblock cblock;
/*
* make sure things are correct size on machines with 8 byte longs
*/
DES_LONG deslong[2];
} ks[16];
} DES_key_schedule;
#define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
l|=((DES_LONG)(*((c)++)))<< 8L, \
l|=((DES_LONG)(*((c)++)))<<16L, \
l|=((DES_LONG)(*((c)++)))<<24L)
# define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
*((c)++)=(unsigned char)(((l)>>24L)&0xff))
#define ITERATIONS 16
#define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n))))
# define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
(b)^=(t),\
(a)^=((t)<<(n)))
#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
(a)=(a)^(t)^(t>>(16-(n))))
# define IP(l,r) \
{ \
register DES_LONG tt; \
PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
PERM_OP(l,r,tt,16,0x0000ffffL); \
PERM_OP(r,l,tt, 2,0x33333333L); \
PERM_OP(l,r,tt, 8,0x00ff00ffL); \
PERM_OP(r,l,tt, 1,0x55555555L); \
}
# define FP(l,r) \
{ \
register DES_LONG tt; \
PERM_OP(l,r,tt, 1,0x55555555L); \
PERM_OP(r,l,tt, 8,0x00ff00ffL); \
PERM_OP(l,r,tt, 2,0x33333333L); \
PERM_OP(r,l,tt,16,0x0000ffffL); \
PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
}
#define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
#define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
u=R^s[S ]; \
t=R^s[S+1]
#define D_ENCRYPT(LL,R,S) { \
LOAD_DATA_tmp(R,S,u,t,E0,E1); \
t=ROTATE(t,4); \
LL^= \
DES_SPtrans[0][(u>> 2L)&0x3f]^ \
DES_SPtrans[2][(u>>10L)&0x3f]^ \
DES_SPtrans[4][(u>>18L)&0x3f]^ \
DES_SPtrans[6][(u>>26L)&0x3f]^ \
DES_SPtrans[1][(t>> 2L)&0x3f]^ \
DES_SPtrans[3][(t>>10L)&0x3f]^ \
DES_SPtrans[5][(t>>18L)&0x3f]^ \
DES_SPtrans[7][(t>>26L)&0x3f]; }
static const DES_LONG DES_SPtrans[8][64] = {
{
/* nibble 0 */
0x02080800L, 0x00080000L, 0x02000002L, 0x02080802L,
0x02000000L, 0x00080802L, 0x00080002L, 0x02000002L,
0x00080802L, 0x02080800L, 0x02080000L, 0x00000802L,
0x02000802L, 0x02000000L, 0x00000000L, 0x00080002L,
0x00080000L, 0x00000002L, 0x02000800L, 0x00080800L,
0x02080802L, 0x02080000L, 0x00000802L, 0x02000800L,
0x00000002L, 0x00000800L, 0x00080800L, 0x02080002L,
0x00000800L, 0x02000802L, 0x02080002L, 0x00000000L,
0x00000000L, 0x02080802L, 0x02000800L, 0x00080002L,
0x02080800L, 0x00080000L, 0x00000802L, 0x02000800L,
0x02080002L, 0x00000800L, 0x00080800L, 0x02000002L,
0x00080802L, 0x00000002L, 0x02000002L, 0x02080000L,
0x02080802L, 0x00080800L, 0x02080000L, 0x02000802L,
0x02000000L, 0x00000802L, 0x00080002L, 0x00000000L,
0x00080000L, 0x02000000L, 0x02000802L, 0x02080800L,
0x00000002L, 0x02080002L, 0x00000800L, 0x00080802L,
},
{
/* nibble 1 */
0x40108010L, 0x00000000L, 0x00108000L, 0x40100000L,
0x40000010L, 0x00008010L, 0x40008000L, 0x00108000L,
0x00008000L, 0x40100010L, 0x00000010L, 0x40008000L,
0x00100010L, 0x40108000L, 0x40100000L, 0x00000010L,
0x00100000L, 0x40008010L, 0x40100010L, 0x00008000L,
0x00108010L, 0x40000000L, 0x00000000L, 0x00100010L,
0x40008010L, 0x00108010L, 0x40108000L, 0x40000010L,
0x40000000L, 0x00100000L, 0x00008010L, 0x40108010L,
0x00100010L, 0x40108000L, 0x40008000L, 0x00108010L,
0x40108010L, 0x00100010L, 0x40000010L, 0x00000000L,
0x40000000L, 0x00008010L, 0x00100000L, 0x40100010L,
0x00008000L, 0x40000000L, 0x00108010L, 0x40008010L,
0x40108000L, 0x00008000L, 0x00000000L, 0x40000010L,
0x00000010L, 0x40108010L, 0x00108000L, 0x40100000L,
0x40100010L, 0x00100000L, 0x00008010L, 0x40008000L,
0x40008010L, 0x00000010L, 0x40100000L, 0x00108000L,
},
{
/* nibble 2 */
0x04000001L, 0x04040100L, 0x00000100L, 0x04000101L,
0x00040001L, 0x04000000L, 0x04000101L, 0x00040100L,
0x04000100L, 0x00040000L, 0x04040000L, 0x00000001L,
0x04040101L, 0x00000101L, 0x00000001L, 0x04040001L,
0x00000000L, 0x00040001L, 0x04040100L, 0x00000100L,
0x00000101L, 0x04040101L, 0x00040000L, 0x04000001L,
0x04040001L, 0x04000100L, 0x00040101L, 0x04040000L,
0x00040100L, 0x00000000L, 0x04000000L, 0x00040101L,
0x04040100L, 0x00000100L, 0x00000001L, 0x00040000L,
0x00000101L, 0x00040001L, 0x04040000L, 0x04000101L,
0x00000000L, 0x04040100L, 0x00040100L, 0x04040001L,
0x00040001L, 0x04000000L, 0x04040101L, 0x00000001L,
0x00040101L, 0x04000001L, 0x04000000L, 0x04040101L,
0x00040000L, 0x04000100L, 0x04000101L, 0x00040100L,
0x04000100L, 0x00000000L, 0x04040001L, 0x00000101L,
0x04000001L, 0x00040101L, 0x00000100L, 0x04040000L,
},
{
/* nibble 3 */
0x00401008L, 0x10001000L, 0x00000008L, 0x10401008L,
0x00000000L, 0x10400000L, 0x10001008L, 0x00400008L,
0x10401000L, 0x10000008L, 0x10000000L, 0x00001008L,
0x10000008L, 0x00401008L, 0x00400000L, 0x10000000L,
0x10400008L, 0x00401000L, 0x00001000L, 0x00000008L,
0x00401000L, 0x10001008L, 0x10400000L, 0x00001000L,
0x00001008L, 0x00000000L, 0x00400008L, 0x10401000L,
0x10001000L, 0x10400008L, 0x10401008L, 0x00400000L,
0x10400008L, 0x00001008L, 0x00400000L, 0x10000008L,
0x00401000L, 0x10001000L, 0x00000008L, 0x10400000L,
0x10001008L, 0x00000000L, 0x00001000L, 0x00400008L,
0x00000000L, 0x10400008L, 0x10401000L, 0x00001000L,
0x10000000L, 0x10401008L, 0x00401008L, 0x00400000L,
0x10401008L, 0x00000008L, 0x10001000L, 0x00401008L,
0x00400008L, 0x00401000L, 0x10400000L, 0x10001008L,
0x00001008L, 0x10000000L, 0x10000008L, 0x10401000L,
},
{
/* nibble 4 */
0x08000000L, 0x00010000L, 0x00000400L, 0x08010420L,
0x08010020L, 0x08000400L, 0x00010420L, 0x08010000L,
0x00010000L, 0x00000020L, 0x08000020L, 0x00010400L,
0x08000420L, 0x08010020L, 0x08010400L, 0x00000000L,
0x00010400L, 0x08000000L, 0x00010020L, 0x00000420L,
0x08000400L, 0x00010420L, 0x00000000L, 0x08000020L,
0x00000020L, 0x08000420L, 0x08010420L, 0x00010020L,
0x08010000L, 0x00000400L, 0x00000420L, 0x08010400L,
0x08010400L, 0x08000420L, 0x00010020L, 0x08010000L,
0x00010000L, 0x00000020L, 0x08000020L, 0x08000400L,
0x08000000L, 0x00010400L, 0x08010420L, 0x00000000L,
0x00010420L, 0x08000000L, 0x00000400L, 0x00010020L,
0x08000420L, 0x00000400L, 0x00000000L, 0x08010420L,
0x08010020L, 0x08010400L, 0x00000420L, 0x00010000L,
0x00010400L, 0x08010020L, 0x08000400L, 0x00000420L,
0x00000020L, 0x00010420L, 0x08010000L, 0x08000020L,
},
{
/* nibble 5 */
0x80000040L, 0x00200040L, 0x00000000L, 0x80202000L,
0x00200040L, 0x00002000L, 0x80002040L, 0x00200000L,
0x00002040L, 0x80202040L, 0x00202000L, 0x80000000L,
0x80002000L, 0x80000040L, 0x80200000L, 0x00202040L,
0x00200000L, 0x80002040L, 0x80200040L, 0x00000000L,
0x00002000L, 0x00000040L, 0x80202000L, 0x80200040L,
0x80202040L, 0x80200000L, 0x80000000L, 0x00002040L,
0x00000040L, 0x00202000L, 0x00202040L, 0x80002000L,
0x00002040L, 0x80000000L, 0x80002000L, 0x00202040L,
0x80202000L, 0x00200040L, 0x00000000L, 0x80002000L,
0x80000000L, 0x00002000L, 0x80200040L, 0x00200000L,
0x00200040L, 0x80202040L, 0x00202000L, 0x00000040L,
0x80202040L, 0x00202000L, 0x00200000L, 0x80002040L,
0x80000040L, 0x80200000L, 0x00202040L, 0x00000000L,
0x00002000L, 0x80000040L, 0x80002040L, 0x80202000L,
0x80200000L, 0x00002040L, 0x00000040L, 0x80200040L,
},
{
/* nibble 6 */
0x00004000L, 0x00000200L, 0x01000200L, 0x01000004L,
0x01004204L, 0x00004004L, 0x00004200L, 0x00000000L,
0x01000000L, 0x01000204L, 0x00000204L, 0x01004000L,
0x00000004L, 0x01004200L, 0x01004000L, 0x00000204L,
0x01000204L, 0x00004000L, 0x00004004L, 0x01004204L,
0x00000000L, 0x01000200L, 0x01000004L, 0x00004200L,
0x01004004L, 0x00004204L, 0x01004200L, 0x00000004L,
0x00004204L, 0x01004004L, 0x00000200L, 0x01000000L,
0x00004204L, 0x01004000L, 0x01004004L, 0x00000204L,
0x00004000L, 0x00000200L, 0x01000000L, 0x01004004L,
0x01000204L, 0x00004204L, 0x00004200L, 0x00000000L,
0x00000200L, 0x01000004L, 0x00000004L, 0x01000200L,
0x00000000L, 0x01000204L, 0x01000200L, 0x00004200L,
0x00000204L, 0x00004000L, 0x01004204L, 0x01000000L,
0x01004200L, 0x00000004L, 0x00004004L, 0x01004204L,
0x01000004L, 0x01004200L, 0x01004000L, 0x00004004L,
},
{
/* nibble 7 */
0x20800080L, 0x20820000L, 0x00020080L, 0x00000000L,
0x20020000L, 0x00800080L, 0x20800000L, 0x20820080L,
0x00000080L, 0x20000000L, 0x00820000L, 0x00020080L,
0x00820080L, 0x20020080L, 0x20000080L, 0x20800000L,
0x00020000L, 0x00820080L, 0x00800080L, 0x20020000L,
0x20820080L, 0x20000080L, 0x00000000L, 0x00820000L,
0x20000000L, 0x00800000L, 0x20020080L, 0x20800080L,
0x00800000L, 0x00020000L, 0x20820000L, 0x00000080L,
0x00800000L, 0x00020000L, 0x20000080L, 0x20820080L,
0x00020080L, 0x20000000L, 0x00000000L, 0x00820000L,
0x20800080L, 0x20020080L, 0x20020000L, 0x00800080L,
0x20820000L, 0x00000080L, 0x00800080L, 0x20020000L,
0x20820080L, 0x00800000L, 0x20800000L, 0x20000080L,
0x00820000L, 0x00020080L, 0x20020080L, 0x20800000L,
0x00000080L, 0x20820000L, 0x00820080L, 0x00000000L,
0x20000000L, 0x20800080L, 0x00020000L, 0x00820080L,
}
};
static const DES_LONG des_skb[8][64] = {
{
/* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000L, 0x00000010L, 0x20000000L, 0x20000010L,
0x00010000L, 0x00010010L, 0x20010000L, 0x20010010L,
0x00000800L, 0x00000810L, 0x20000800L, 0x20000810L,
0x00010800L, 0x00010810L, 0x20010800L, 0x20010810L,
0x00000020L, 0x00000030L, 0x20000020L, 0x20000030L,
0x00010020L, 0x00010030L, 0x20010020L, 0x20010030L,
0x00000820L, 0x00000830L, 0x20000820L, 0x20000830L,
0x00010820L, 0x00010830L, 0x20010820L, 0x20010830L,
0x00080000L, 0x00080010L, 0x20080000L, 0x20080010L,
0x00090000L, 0x00090010L, 0x20090000L, 0x20090010L,
0x00080800L, 0x00080810L, 0x20080800L, 0x20080810L,
0x00090800L, 0x00090810L, 0x20090800L, 0x20090810L,
0x00080020L, 0x00080030L, 0x20080020L, 0x20080030L,
0x00090020L, 0x00090030L, 0x20090020L, 0x20090030L,
0x00080820L, 0x00080830L, 0x20080820L, 0x20080830L,
0x00090820L, 0x00090830L, 0x20090820L, 0x20090830L,
},
{
/* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
0x00000000L, 0x02000000L, 0x00002000L, 0x02002000L,
0x00200000L, 0x02200000L, 0x00202000L, 0x02202000L,
0x00000004L, 0x02000004L, 0x00002004L, 0x02002004L,
0x00200004L, 0x02200004L, 0x00202004L, 0x02202004L,
0x00000400L, 0x02000400L, 0x00002400L, 0x02002400L,
0x00200400L, 0x02200400L, 0x00202400L, 0x02202400L,
0x00000404L, 0x02000404L, 0x00002404L, 0x02002404L,
0x00200404L, 0x02200404L, 0x00202404L, 0x02202404L,
0x10000000L, 0x12000000L, 0x10002000L, 0x12002000L,
0x10200000L, 0x12200000L, 0x10202000L, 0x12202000L,
0x10000004L, 0x12000004L, 0x10002004L, 0x12002004L,
0x10200004L, 0x12200004L, 0x10202004L, 0x12202004L,
0x10000400L, 0x12000400L, 0x10002400L, 0x12002400L,
0x10200400L, 0x12200400L, 0x10202400L, 0x12202400L,
0x10000404L, 0x12000404L, 0x10002404L, 0x12002404L,
0x10200404L, 0x12200404L, 0x10202404L, 0x12202404L,
},
{
/* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
0x00000000L, 0x00000001L, 0x00040000L, 0x00040001L,
0x01000000L, 0x01000001L, 0x01040000L, 0x01040001L,
0x00000002L, 0x00000003L, 0x00040002L, 0x00040003L,
0x01000002L, 0x01000003L, 0x01040002L, 0x01040003L,
0x00000200L, 0x00000201L, 0x00040200L, 0x00040201L,
0x01000200L, 0x01000201L, 0x01040200L, 0x01040201L,
0x00000202L, 0x00000203L, 0x00040202L, 0x00040203L,
0x01000202L, 0x01000203L, 0x01040202L, 0x01040203L,
0x08000000L, 0x08000001L, 0x08040000L, 0x08040001L,
0x09000000L, 0x09000001L, 0x09040000L, 0x09040001L,
0x08000002L, 0x08000003L, 0x08040002L, 0x08040003L,
0x09000002L, 0x09000003L, 0x09040002L, 0x09040003L,
0x08000200L, 0x08000201L, 0x08040200L, 0x08040201L,
0x09000200L, 0x09000201L, 0x09040200L, 0x09040201L,
0x08000202L, 0x08000203L, 0x08040202L, 0x08040203L,
0x09000202L, 0x09000203L, 0x09040202L, 0x09040203L,
},
{
/* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
0x00000000L, 0x00100000L, 0x00000100L, 0x00100100L,
0x00000008L, 0x00100008L, 0x00000108L, 0x00100108L,
0x00001000L, 0x00101000L, 0x00001100L, 0x00101100L,
0x00001008L, 0x00101008L, 0x00001108L, 0x00101108L,
0x04000000L, 0x04100000L, 0x04000100L, 0x04100100L,
0x04000008L, 0x04100008L, 0x04000108L, 0x04100108L,
0x04001000L, 0x04101000L, 0x04001100L, 0x04101100L,
0x04001008L, 0x04101008L, 0x04001108L, 0x04101108L,
0x00020000L, 0x00120000L, 0x00020100L, 0x00120100L,
0x00020008L, 0x00120008L, 0x00020108L, 0x00120108L,
0x00021000L, 0x00121000L, 0x00021100L, 0x00121100L,
0x00021008L, 0x00121008L, 0x00021108L, 0x00121108L,
0x04020000L, 0x04120000L, 0x04020100L, 0x04120100L,
0x04020008L, 0x04120008L, 0x04020108L, 0x04120108L,
0x04021000L, 0x04121000L, 0x04021100L, 0x04121100L,
0x04021008L, 0x04121008L, 0x04021108L, 0x04121108L,
},
{
/* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000L, 0x10000000L, 0x00010000L, 0x10010000L,
0x00000004L, 0x10000004L, 0x00010004L, 0x10010004L,
0x20000000L, 0x30000000L, 0x20010000L, 0x30010000L,
0x20000004L, 0x30000004L, 0x20010004L, 0x30010004L,
0x00100000L, 0x10100000L, 0x00110000L, 0x10110000L,
0x00100004L, 0x10100004L, 0x00110004L, 0x10110004L,
0x20100000L, 0x30100000L, 0x20110000L, 0x30110000L,
0x20100004L, 0x30100004L, 0x20110004L, 0x30110004L,
0x00001000L, 0x10001000L, 0x00011000L, 0x10011000L,
0x00001004L, 0x10001004L, 0x00011004L, 0x10011004L,
0x20001000L, 0x30001000L, 0x20011000L, 0x30011000L,
0x20001004L, 0x30001004L, 0x20011004L, 0x30011004L,
0x00101000L, 0x10101000L, 0x00111000L, 0x10111000L,
0x00101004L, 0x10101004L, 0x00111004L, 0x10111004L,
0x20101000L, 0x30101000L, 0x20111000L, 0x30111000L,
0x20101004L, 0x30101004L, 0x20111004L, 0x30111004L,
},
{
/* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
0x00000000L, 0x08000000L, 0x00000008L, 0x08000008L,
0x00000400L, 0x08000400L, 0x00000408L, 0x08000408L,
0x00020000L, 0x08020000L, 0x00020008L, 0x08020008L,
0x00020400L, 0x08020400L, 0x00020408L, 0x08020408L,
0x00000001L, 0x08000001L, 0x00000009L, 0x08000009L,
0x00000401L, 0x08000401L, 0x00000409L, 0x08000409L,
0x00020001L, 0x08020001L, 0x00020009L, 0x08020009L,
0x00020401L, 0x08020401L, 0x00020409L, 0x08020409L,
0x02000000L, 0x0A000000L, 0x02000008L, 0x0A000008L,
0x02000400L, 0x0A000400L, 0x02000408L, 0x0A000408L,
0x02020000L, 0x0A020000L, 0x02020008L, 0x0A020008L,
0x02020400L, 0x0A020400L, 0x02020408L, 0x0A020408L,
0x02000001L, 0x0A000001L, 0x02000009L, 0x0A000009L,
0x02000401L, 0x0A000401L, 0x02000409L, 0x0A000409L,
0x02020001L, 0x0A020001L, 0x02020009L, 0x0A020009L,
0x02020401L, 0x0A020401L, 0x02020409L, 0x0A020409L,
},
{
/* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
0x00000000L, 0x00000100L, 0x00080000L, 0x00080100L,
0x01000000L, 0x01000100L, 0x01080000L, 0x01080100L,
0x00000010L, 0x00000110L, 0x00080010L, 0x00080110L,
0x01000010L, 0x01000110L, 0x01080010L, 0x01080110L,
0x00200000L, 0x00200100L, 0x00280000L, 0x00280100L,
0x01200000L, 0x01200100L, 0x01280000L, 0x01280100L,
0x00200010L, 0x00200110L, 0x00280010L, 0x00280110L,
0x01200010L, 0x01200110L, 0x01280010L, 0x01280110L,
0x00000200L, 0x00000300L, 0x00080200L, 0x00080300L,
0x01000200L, 0x01000300L, 0x01080200L, 0x01080300L,
0x00000210L, 0x00000310L, 0x00080210L, 0x00080310L,
0x01000210L, 0x01000310L, 0x01080210L, 0x01080310L,
0x00200200L, 0x00200300L, 0x00280200L, 0x00280300L,
0x01200200L, 0x01200300L, 0x01280200L, 0x01280300L,
0x00200210L, 0x00200310L, 0x00280210L, 0x00280310L,
0x01200210L, 0x01200310L, 0x01280210L, 0x01280310L,
},
{
/* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
0x00000000L, 0x04000000L, 0x00040000L, 0x04040000L,
0x00000002L, 0x04000002L, 0x00040002L, 0x04040002L,
0x00002000L, 0x04002000L, 0x00042000L, 0x04042000L,
0x00002002L, 0x04002002L, 0x00042002L, 0x04042002L,
0x00000020L, 0x04000020L, 0x00040020L, 0x04040020L,
0x00000022L, 0x04000022L, 0x00040022L, 0x04040022L,
0x00002020L, 0x04002020L, 0x00042020L, 0x04042020L,
0x00002022L, 0x04002022L, 0x00042022L, 0x04042022L,
0x00000800L, 0x04000800L, 0x00040800L, 0x04040800L,
0x00000802L, 0x04000802L, 0x00040802L, 0x04040802L,
0x00002800L, 0x04002800L, 0x00042800L, 0x04042800L,
0x00002802L, 0x04002802L, 0x00042802L, 0x04042802L,
0x00000820L, 0x04000820L, 0x00040820L, 0x04040820L,
0x00000822L, 0x04000822L, 0x00040822L, 0x04040822L,
0x00002820L, 0x04002820L, 0x00042820L, 0x04042820L,
0x00002822L, 0x04002822L, 0x00042822L, 0x04042822L,
}
};
static void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
{
register DES_LONG l, r, t, u;
register DES_LONG *s;
r = data[0];
l = data[1];
IP(r, l);
/*
* Things have been modified so that the initial rotate is done outside
* the loop. This required the DES_SPtrans values in sp.h to be rotated
* 1 bit to the right. One perl script later and things have a 5% speed
* up on a sparc2. Thanks to Richard Outerbridge for pointing this out.
*/
/* clear the top bits on machines with 8byte longs */
/* shift left by 2 */
r = ROTATE(r, 29) & 0xffffffffL;
l = ROTATE(l, 29) & 0xffffffffL;
s = ks->ks->deslong;
/*
* I don't know if it is worth the effort of loop unrolling the inner
* loop
*/
if (enc) {
D_ENCRYPT(l, r, 0); /* 1 */
D_ENCRYPT(r, l, 2); /* 2 */
D_ENCRYPT(l, r, 4); /* 3 */
D_ENCRYPT(r, l, 6); /* 4 */
D_ENCRYPT(l, r, 8); /* 5 */
D_ENCRYPT(r, l, 10); /* 6 */
D_ENCRYPT(l, r, 12); /* 7 */
D_ENCRYPT(r, l, 14); /* 8 */
D_ENCRYPT(l, r, 16); /* 9 */
D_ENCRYPT(r, l, 18); /* 10 */
D_ENCRYPT(l, r, 20); /* 11 */
D_ENCRYPT(r, l, 22); /* 12 */
D_ENCRYPT(l, r, 24); /* 13 */
D_ENCRYPT(r, l, 26); /* 14 */
D_ENCRYPT(l, r, 28); /* 15 */
D_ENCRYPT(r, l, 30); /* 16 */
} else {
D_ENCRYPT(l, r, 30); /* 16 */
D_ENCRYPT(r, l, 28); /* 15 */
D_ENCRYPT(l, r, 26); /* 14 */
D_ENCRYPT(r, l, 24); /* 13 */
D_ENCRYPT(l, r, 22); /* 12 */
D_ENCRYPT(r, l, 20); /* 11 */
D_ENCRYPT(l, r, 18); /* 10 */
D_ENCRYPT(r, l, 16); /* 9 */
D_ENCRYPT(l, r, 14); /* 8 */
D_ENCRYPT(r, l, 12); /* 7 */
D_ENCRYPT(l, r, 10); /* 6 */
D_ENCRYPT(r, l, 8); /* 5 */
D_ENCRYPT(l, r, 6); /* 4 */
D_ENCRYPT(r, l, 4); /* 3 */
D_ENCRYPT(l, r, 2); /* 2 */
D_ENCRYPT(r, l, 0); /* 1 */
}
/* rotate and clear the top bits on machines with 8byte longs */
l = ROTATE(l, 3) & 0xffffffffL;
r = ROTATE(r, 3) & 0xffffffffL;
FP(r, l);
data[0] = l;
data[1] = r;
l = r = t = u = 0;
}
static void DES_ecb_encrypt(const DES_cblock *input, DES_cblock *output,
DES_key_schedule *ks, int enc)
{
register DES_LONG l;
DES_LONG ll[2];
const unsigned char *in = &(*input)[0];
unsigned char *out = &(*output)[0];
c2l(in, l);
ll[0] = l;
c2l(in, l);
ll[1] = l;
DES_encrypt1(ll, ks, enc);
l = ll[0];
l2c(l, out);
l = ll[1];
l2c(l, out);
l = ll[0] = ll[1] = 0;
}
static void DES_set_key(const DES_cblock *key, DES_key_schedule *schedule)
{
static const int shifts2[16] =
{ 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0 };
register DES_LONG c, d, t, s, t2;
register const unsigned char *in;
register DES_LONG *k;
register int i;
#ifdef OPENBSD_DEV_CRYPTO
memcpy(schedule->key, key, sizeof(schedule->key));
schedule->session = NULL;
#endif
k = &schedule->ks->deslong[0];
in = &(*key)[0];
c2l(in, c);
c2l(in, d);
/*
* do PC1 in 47 simple operations. Thanks to John Fletcher
* for the inspiration.
*/
PERM_OP(d, c, t, 4, 0x0f0f0f0fL);
HPERM_OP(c, t, -2, 0xcccc0000L);
HPERM_OP(d, t, -2, 0xcccc0000L);
PERM_OP(d, c, t, 1, 0x55555555L);
PERM_OP(c, d, t, 8, 0x00ff00ffL);
PERM_OP(d, c, t, 1, 0x55555555L);
d = (((d & 0x000000ffL) << 16L) | (d & 0x0000ff00L) |
((d & 0x00ff0000L) >> 16L) | ((c & 0xf0000000L) >> 4L));
c &= 0x0fffffffL;
for (i = 0; i < ITERATIONS; i++) {
if (shifts2[i]) {
c = ((c >> 2L) | (c << 26L));
d = ((d >> 2L) | (d << 26L));
} else {
c = ((c >> 1L) | (c << 27L));
d = ((d >> 1L) | (d << 27L));
}
c &= 0x0fffffffL;
d &= 0x0fffffffL;
/*
* could be a few less shifts but I am to lazy at this point in time
* to investigate
*/
s = des_skb[0][(c) & 0x3f] |
des_skb[1][((c >> 6L) & 0x03) | ((c >> 7L) & 0x3c)] |
des_skb[2][((c >> 13L) & 0x0f) | ((c >> 14L) & 0x30)] |
des_skb[3][((c >> 20L) & 0x01) | ((c >> 21L) & 0x06) |
((c >> 22L) & 0x38)];
t = des_skb[4][(d) & 0x3f] |
des_skb[5][((d >> 7L) & 0x03) | ((d >> 8L) & 0x3c)] |
des_skb[6][(d >> 15L) & 0x3f] |
des_skb[7][((d >> 21L) & 0x0f) | ((d >> 22L) & 0x30)];
/* table contained 0213 4657 */
t2 = ((t << 16L) | (s & 0x0000ffffL)) & 0xffffffffL;
*(k++) = ROTATE(t2, 30) & 0xffffffffL;
t2 = ((s >> 16L) | (t & 0xffff0000L));
*(k++) = ROTATE(t2, 26) & 0xffffffffL;
}
}
/* End of import of OpenSSL DES encryption functions */
static int des_init(PPP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv)
{
DES_key_schedule *ks = calloc(1, sizeof(DES_key_schedule));
if (ks) {
if (key) {
memcpy(ctx->key, key, 8);
}
if (iv) {
memcpy(ctx->iv, iv, 8);
}
if (key) {
DES_set_key((DES_cblock*) &ctx->key, ks);
}
ctx->priv = ks;
return 1;
}
return 0;
}
static int des_update(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl, const unsigned char *in, int inl)
{
int offset = 0;
inl = inl / 8;
while (offset < inl) {
DES_ecb_encrypt((DES_cblock *)in + offset, (DES_cblock *)out + offset,
(DES_key_schedule*) ctx->priv, ctx->is_encr);
offset ++;
}
*outl = offset * 8;
return 1;
}
static int des_final(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
return 1;
}
static void des_clean(PPP_CIPHER_CTX *ctx)
{
if (ctx->priv) {
free(ctx->priv);
ctx->priv = NULL;
}
}
#endif
static PPP_CIPHER ppp_des = {
.init_fn = des_init,
.update_fn = des_update,
.final_fn = des_final,
.clean_fn = des_clean,
};
const PPP_CIPHER *PPP_des_ecb(void)
{
return &ppp_des;
}
