/* * 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 1995-2020 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 #include #include "ppp-crypto-priv.h" /* * DES related functions are imported from openssl 3.0 project with the * follwoing license: * * Copyright 1995-2020 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 char DES_cblock[8]; #define DES_KEY_SZ (sizeof(DES_cblock)) static const unsigned char odd_parity[256] = { 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31, 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47, 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62, 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79, 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94, 97, 97, 98, 98, 100, 100, 103, 103, 104, 104, 107, 107, 109, 109, 110, 110, 112, 112, 115, 115, 117, 117, 118, 118, 121, 121, 122, 122, 124, 124, 127, 127, 128, 128, 131, 131, 133, 133, 134, 134, 137, 137, 138, 138, 140, 140, 143, 143, 145, 145, 146, 146, 148, 148, 151, 151, 152, 152, 155, 155, 157, 157, 158, 158, 161, 161, 162, 162, 164, 164, 167, 167, 168, 168, 171, 171, 173, 173, 174, 174, 176, 176, 179, 179, 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191, 191, 193, 193, 194, 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206, 206, 208, 208, 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223, 223, 224, 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239, 239, 241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254, 254 }; static void DES_set_odd_parity(DES_cblock *key) { unsigned int i; for (i = 0; i < DES_KEY_SZ; i++) (*key)[i] = odd_parity[(*key)[i]]; } static unsigned char Get7Bits(const unsigned char *input, int startBit) { unsigned int word; word = (unsigned)input[startBit / 8] << 8; word |= (unsigned)input[startBit / 8 + 1]; word >>= 15 - (startBit % 8 + 7); return word & 0xFE; } static void MakeKey(const unsigned char *key, unsigned char *des_key) { /* key IN 56 bit DES key missing parity bits */ /* des_key OUT 64 bit DES key with parity bits added */ des_key[0] = Get7Bits(key, 0); des_key[1] = Get7Bits(key, 7); des_key[2] = Get7Bits(key, 14); des_key[3] = Get7Bits(key, 21); des_key[4] = Get7Bits(key, 28); des_key[5] = Get7Bits(key, 35); des_key[6] = Get7Bits(key, 42); des_key[7] = Get7Bits(key, 49); DES_set_odd_parity((DES_cblock *)des_key); } #ifdef OPENSSL_HAVE_DES #include #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) { MakeKey(key, ctx->key); } 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; } } /** * Using the EVP_ interface with openssl, there is no replacement for the * DES_set_key() function, and each iteration of DesEncrypt(Clear,Key,Cipher) * per RFC2759 is another iteration of the EVP_CipherInit, EVP_CipherUpdate, * EVP_CipherFinal functions. * * As a work-around, we reset the EVP_CIPHER_CTX object, and re-initializes * the context by calling EVP_CipherInit() with the new key. */ static void des_set_key(PPP_CIPHER_CTX *ctx, const unsigned char *key) { EVP_CIPHER_CTX_reset((EVP_CIPHER_CTX*) ctx->priv); MakeKey(key, ctx->key); EVP_CipherInit((EVP_CIPHER_CTX*) ctx->priv, EVP_des_ecb(), ctx->key, ctx->iv, ctx->is_encr); } #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) { MakeKey(key, ctx->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; } } static void des_set_key(PPP_CIPHER_CTX *ctx, const unsigned char *key) { MakeKey(key, ctx->key); DES_set_key((DES_cblock*) &ctx->key, (DES_key_schedule*) ctx->priv); } #endif static PPP_CIPHER ppp_des = { .init_fn = des_init, .update_fn = des_update, .final_fn = des_final, .set_key_fn = des_set_key, .clean_fn = des_clean, }; const PPP_CIPHER *PPP_des_ecb(void) { return &ppp_des; }