+++ /dev/null
-/*
- * pppcrypt.c - PPP/DES linkage for MS-CHAP and EAP SRP-SHA1
- *
- * Extracted from chap_ms.c by James Carlson.
- *
- * Copyright (c) 1995 Eric Rosenquist. 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 "pppcrypt.h"
-#include "ppp-crypto.h"
-
-
-/*
- * DES_set_odd_parity function 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);
-}
-
-#include <openssl/evp.h>
-
-int
-DesEncrypt(unsigned char *clear, unsigned char *key, unsigned char *cipher)
-{
- int retval = 0;
- unsigned int clen = 0;
- unsigned char des_key[8];
-
- PPP_CIPHER_CTX *ctx = PPP_CIPHER_CTX_new();
- if (ctx) {
-
- MakeKey(key, des_key);
-
- if (PPP_CipherInit(ctx, PPP_des_ecb(), des_key, NULL, 1)) {
-
- if (PPP_CipherUpdate(ctx, cipher, &clen, clear, 8)) {
-
- if (PPP_CipherFinal(ctx, cipher + clen, &clen)) {
-
- retval = 1;
- }
- }
- }
-
- PPP_CIPHER_CTX_free(ctx);
- }
-
- return (retval);
-}
-
-int
-DesDecrypt(unsigned char *cipher, unsigned char *key, unsigned char *clear)
-{
- int retval = 0;
- unsigned int clen = 0;
- unsigned char des_key[8];
-
- PPP_CIPHER_CTX *ctx = PPP_CIPHER_CTX_new();
- if (ctx) {
-
- MakeKey(key, des_key);
-
- if (PPP_CipherInit(ctx, PPP_des_ecb(), des_key, NULL, 0)) {
-
- if (PPP_CipherUpdate(ctx, clear, &clen, cipher, 8)) {
-
- if (PPP_CipherFinal(ctx, clear + clen, &clen)) {
-
- retval = 1;
- }
- }
- }
-
- PPP_CIPHER_CTX_free(ctx);
- }
-
- return (retval);
-}
-
-#ifdef UNIT_TEST_PPPCRYPT
-
-#include <string.h>
-#include <stdio.h>
-
-/**
- * The test-vectors are taken from RFC2759.
- */
-int test_encrypt()
-{
- unsigned char Challenge[8] = {
- 0xD0, 0x2E, 0x43, 0x86, 0xBC, 0xE9, 0x12, 0x26
- };
-
- unsigned char ZPasswordHash[21] = {
- 0x44, 0xEB, 0xBA, 0x8D, 0x53, 0x12, 0xB8, 0xD6,
- 0x11, 0x47, 0x44, 0x11, 0xF5, 0x69, 0x89, 0xAE
- };
-
- unsigned char expected[24] = {
- 0x82, 0x30, 0x9E, 0xCD, 0x8D, 0x70, 0x8B, 0x5E,
- 0xA0, 0x8F, 0xAA, 0x39, 0x81, 0xCD, 0x83, 0x54,
- 0x42, 0x33, 0x11, 0x4A, 0x3D, 0x85, 0xD6, 0xDF
- };
- unsigned char response[24] = {};
- unsigned int retval = 0;
-
- DesEncrypt(Challenge, ZPasswordHash + 0, response + 0);
- DesEncrypt(Challenge, ZPasswordHash + 7, response + 8);
- DesEncrypt(Challenge, ZPasswordHash + 14, response + 16);
-
- return memcmp(response, expected, sizeof(response)) == 0;
-}
-
-int test_decrypt()
-{
- unsigned char Challenge[8] = {
- 0xD0, 0x2E, 0x43, 0x86, 0xBC, 0xE9, 0x12, 0x26
- };
-
- unsigned char ZPasswordHash[21] = {
- 0x44, 0xEB, 0xBA, 0x8D, 0x53, 0x12, 0xB8, 0xD6,
- 0x11, 0x47, 0x44, 0x11, 0xF5, 0x69, 0x89, 0xAE
- };
-
- unsigned char Response[24] = {
- 0x82, 0x30, 0x9E, 0xCD, 0x8D, 0x70, 0x8B, 0x5E,
- 0xA0, 0x8F, 0xAA, 0x39, 0x81, 0xCD, 0x83, 0x54,
- 0x42, 0x33, 0x11, 0x4A, 0x3D, 0x85, 0xD6, 0xDF
- };
- unsigned char Output[8];
- unsigned int failure = 0;
-
- if (DesDecrypt(Response + 0, ZPasswordHash + 0, Output)) {
- failure += memcmp(Challenge, Output, sizeof(Challenge));
- }
-
- if (DesDecrypt(Response + 8, ZPasswordHash + 7, Output)) {
- failure += memcmp(Challenge, Output, sizeof(Challenge));
- }
-
- if (DesDecrypt(Response +16, ZPasswordHash +14, Output)) {
- failure += memcmp(Challenge, Output, sizeof(Challenge));
- }
-
- return failure == 0;
-}
-
-int main(int argc, char *argv[])
-{
- int failure = 0;
-
- if (!PPP_crypto_init()) {
- printf("Couldn't initialize crypto test\n");
- return -1;
- }
-
- if (!test_encrypt()) {
- printf("CHAP DES encryption test failed\n");
- failure++;
- }
-
- if (!test_decrypt()) {
- printf("CHAP DES decryption test failed\n");
- failure++;
- }
-
- if (!PPP_crypto_deinit()) {
- printf("Couldn't deinitialize crypto test\n");
- return -1;
- }
-
- return failure;
-}
-
-#endif
projects / ppp.git / blobdiff