diff options
Diffstat (limited to 'pppd/ppp-des.c')
| -rw-r--r-- | pppd/ppp-des.c | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/pppd/ppp-des.c b/pppd/ppp-des.c new file mode 100644 index 0000000..695caa4 --- /dev/null +++ b/pppd/ppp-des.c @@ -0,0 +1,730 @@ +/* + * 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 "ppp-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; +} + |