/* * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * chap_ms.c - Microsoft MS-CHAP compatible implementation. * * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited. * http://www.strataware.com/ * * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by Eric Rosenquist. The name of the author may not be used to * endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997 * * Implemented LANManager type password response to MS-CHAP challenges. * Now pppd provides both NT style and LANMan style blocks, and the * prefered is set by option "ms-lanman". Default is to use NT. * The hash text (StdText) was taken from Win95 RASAPI32.DLL. * * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80 */ /* * Modifications by Frank Cusack, frank@google.com, March 2002. * * Implemented MS-CHAPv2 functionality, heavily based on sample * implementation in RFC 2759. Implemented MPPE functionality, * heavily based on sample implementation in RFC 3079. * Copyright (c) 2002 Google, Inc. */ #define RCSID "$Id: chap_ms.c,v 1.4 2003/08/14 00:00:29 callie Exp $" #ifdef CHAPMS #include #include #include #include #include #include #include #ifdef HAVE_CRYPT_H #include #endif #include "pppd.h" #include "chap.h" #include "chap_ms.h" #include "md4.h" #ifdef __APPLE__ #include "openssl/sha.h" #define SHA1_CTX SHA_CTX #define SHA1_SIGNATURE_SIZE SHA_DIGEST_LENGTH #else #include "sha1.h" #endif #ifndef USE_CRYPT #include #endif static const char rcsid[] = RCSID; static void ChallengeHash __P((u_char[16], u_char *, char *, u_char[8])); static void ascii2unicode __P((char[], int, u_char[])); static void NTPasswordHash __P((char *, int, u_char[MD4_SIGNATURE_SIZE])); static void ChallengeResponse __P((u_char *, u_char *, u_char[24])); static void DesEncrypt __P((u_char *, u_char *, u_char[8])); static void MakeKey __P((u_char *, u_char *)); static u_char Get7Bits __P((u_char *, int)); static void ChapMS_NT __P((u_char *, char *, int, u_char[24])); static void ChapMS2_NT __P((char *, u_char[16], char *, char *, int, u_char[24])); static void GenerateAuthenticatorResponse __P((char*, int, u_char[24], u_char[16], u_char *, char *, u_char[41])); #ifdef MSLANMAN static void ChapMS_LANMan __P((u_char *, char *, int, MS_ChapResponse *)); #endif #ifdef USE_CRYPT static void Expand __P((u_char *, u_char *)); static void Collapse __P((u_char *, u_char *)); #endif #ifdef MPPE static void Set_Start_Key __P((u_char *, char *, int)); static void SetMasterKeys __P((char *, int, u_char[24], int)); #endif extern double drand48 __P((void)); #ifdef MSLANMAN bool ms_lanman = 0; /* Use LanMan password instead of NT */ /* Has meaning only with MS-CHAP challenges */ #endif #ifdef MPPE u_char mppe_send_key[MPPE_MAX_KEY_LEN]; u_char mppe_recv_key[MPPE_MAX_KEY_LEN]; #endif static void ChallengeResponse(u_char *challenge, u_char PasswordHash[MD4_SIGNATURE_SIZE], u_char response[24]) { char ZPasswordHash[21]; BZERO(ZPasswordHash, sizeof(ZPasswordHash)); BCOPY(PasswordHash, ZPasswordHash, MD4_SIGNATURE_SIZE); #if 0 dbglog("ChallengeResponse - ZPasswordHash %.*B", sizeof(ZPasswordHash), ZPasswordHash); #endif DesEncrypt(challenge, ZPasswordHash + 0, &response[0]); DesEncrypt(challenge, ZPasswordHash + 7, &response[8]); DesEncrypt(challenge, ZPasswordHash + 14, &response[16]); #if 0 dbglog("ChallengeResponse - response %.24B", response); #endif } #ifdef USE_CRYPT static void DesEncrypt(u_char *clear, u_char *key, u_char cipher[8]) { u_char des_key[8]; u_char crypt_key[66]; u_char des_input[66]; MakeKey(key, des_key); Expand(des_key, crypt_key); setkey(crypt_key); #if 0 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %.8B", clear)); #endif Expand(clear, des_input); encrypt(des_input, 0); Collapse(des_input, cipher); #if 0 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %.8B", cipher)); #endif } #else /* USE_CRYPT */ static void DesEncrypt(u_char *clear, u_char *key, u_char cipher[8]) { des_cblock des_key; des_key_schedule key_schedule; MakeKey(key, des_key); des_set_key(&des_key, key_schedule); #if 0 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %.8B", clear)); #endif des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1); #if 0 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %.8B", cipher)); #endif } #endif /* USE_CRYPT */ static u_char Get7Bits(u_char *input, int startBit) { register unsigned int word; word = (unsigned)input[startBit / 8] << 8; word |= (unsigned)input[startBit / 8 + 1]; word >>= 15 - (startBit % 8 + 7); return word & 0xFE; } #ifdef USE_CRYPT /* in == 8-byte string (expanded version of the 56-bit key) * out == 64-byte string where each byte is either 1 or 0 * Note that the low-order "bit" is always ignored by by setkey() */ static void Expand(u_char *in, u_char *out) { int j, c; int i; for(i = 0; i < 64; in++){ c = *in; for(j = 7; j >= 0; j--) *out++ = (c >> j) & 01; i += 8; } } /* The inverse of Expand */ static void Collapse(u_char *in, u_char *out) { int j; int i; unsigned int c; for (i = 0; i < 64; i += 8, out++) { c = 0; for (j = 7; j >= 0; j--, in++) c |= *in << j; *out = c & 0xff; } } #endif static void MakeKey(u_char *key, u_char *des_key) { 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); #ifndef USE_CRYPT des_set_odd_parity((des_cblock *)des_key); #endif #if 0 CHAPDEBUG((LOG_INFO, "MakeKey: 56-bit input : %.7B", key)); CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %.8B", des_key)); #endif } static void ChallengeHash(u_char PeerChallenge[16], u_char *rchallenge, char *username, u_char Challenge[8]) { SHA1_CTX sha1Context; u_char sha1Hash[SHA1_SIGNATURE_SIZE]; char *user; /* remove domain from "domain\username" */ if ((user = strrchr(username, '\\')) != NULL) ++user; else user = username; SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, PeerChallenge, 16); SHA1_Update(&sha1Context, rchallenge, 16); SHA1_Update(&sha1Context, user, strlen(user)); SHA1_Final(sha1Hash, &sha1Context); BCOPY(sha1Hash, Challenge, 8); } /* * Convert the ASCII version of the password to Unicode. * This implicitly supports 8-bit ISO8859/1 characters. * This gives us the little-endian representation, which * is assumed by all M$ CHAP RFCs. (Unicode byte ordering * is machine-dependent.) */ static void ascii2unicode(char ascii[], int ascii_len, u_char unicode[]) { int i; BZERO(unicode, ascii_len * 2); for (i = 0; i < ascii_len; i++) unicode[i * 2] = (u_char) ascii[i]; } static void NTPasswordHash(char *secret, int secret_len, u_char hash[MD4_SIGNATURE_SIZE]) { #ifdef __NetBSD__ /* NetBSD uses the libc md4 routines which take bytes instead of bits */ int mdlen = secret_len; #else int mdlen = secret_len * 8; #endif MD4_CTX md4Context; MD4Init(&md4Context); MD4Update(&md4Context, secret, mdlen); MD4Final(hash, &md4Context); } static void ChapMS_NT(u_char *rchallenge, char *secret, int secret_len, u_char NTResponse[24]) { u_char unicodePassword[MAX_NT_PASSWORD * 2]; u_char PasswordHash[MD4_SIGNATURE_SIZE]; /* Hash the Unicode version of the secret (== password). */ ascii2unicode(secret, secret_len, unicodePassword); NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash); ChallengeResponse(rchallenge, PasswordHash, NTResponse); } static void ChapMS2_NT(char *rchallenge, u_char PeerChallenge[16], char *username, char *secret, int secret_len, u_char NTResponse[24]) { u_char unicodePassword[MAX_NT_PASSWORD * 2]; u_char PasswordHash[MD4_SIGNATURE_SIZE]; u_char Challenge[8]; ChallengeHash(PeerChallenge, rchallenge, username, Challenge); /* Hash the Unicode version of the secret (== password). */ ascii2unicode(secret, secret_len, unicodePassword); NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash); ChallengeResponse(Challenge, PasswordHash, NTResponse); } #ifdef MSLANMAN static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */ static void ChapMS_LANMan(u_char *rchallenge, char *secret, int secret_len, u_char LMResponse[24]) { int i; u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */ u_char PasswordHash[MD4_SIGNATURE_SIZE]; /* LANMan password is case insensitive */ BZERO(UcasePassword, sizeof(UcasePassword)); for (i = 0; i < secret_len; i++) UcasePassword[i] = (u_char)toupper(secret[i]); DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 ); DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 ); ChallengeResponse(rchallenge, PasswordHash, LMResponse); } #endif static void GenerateAuthenticatorResponse(char *secret, int secret_len, u_char NTResponse[24], u_char PeerChallenge[16], u_char *rchallenge, char *username, u_char authResponse[MS_AUTH_RESPONSE_LENGTH+1]) { /* * "Magic" constants used in response generation, from RFC 2759. */ u_char Magic1[39] = /* "Magic server to client signing constant" */ { 0x4D, 0x61, 0x67, 0x69, 0x63, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x74, 0x6F, 0x20, 0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x69, 0x6E, 0x67, 0x20, 0x63, 0x6F, 0x6E, 0x73, 0x74, 0x61, 0x6E, 0x74 }; u_char Magic2[41] = /* "Pad to make it do more than one iteration" */ { 0x50, 0x61, 0x64, 0x20, 0x74, 0x6F, 0x20, 0x6D, 0x61, 0x6B, 0x65, 0x20, 0x69, 0x74, 0x20, 0x64, 0x6F, 0x20, 0x6D, 0x6F, 0x72, 0x65, 0x20, 0x74, 0x68, 0x61, 0x6E, 0x20, 0x6F, 0x6E, 0x65, 0x20, 0x69, 0x74, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6F, 0x6E }; int i; SHA1_CTX sha1Context; u_char unicodePassword[MAX_NT_PASSWORD * 2]; u_char PasswordHash[MD4_SIGNATURE_SIZE]; u_char PasswordHashHash[MD4_SIGNATURE_SIZE]; u_char Digest[SHA1_SIGNATURE_SIZE]; u_char Challenge[8]; /* Hash (x2) the Unicode version of the secret (== password). */ ascii2unicode(secret, secret_len, unicodePassword); NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash); NTPasswordHash(PasswordHash, sizeof(PasswordHash), PasswordHashHash); SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, PasswordHashHash, sizeof(PasswordHashHash)); SHA1_Update(&sha1Context, NTResponse, 24); SHA1_Update(&sha1Context, Magic1, sizeof(Magic1)); SHA1_Final(Digest, &sha1Context); ChallengeHash(PeerChallenge, rchallenge, username, Challenge); SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, Digest, sizeof(Digest)); SHA1_Update(&sha1Context, Challenge, sizeof(Challenge)); SHA1_Update(&sha1Context, Magic2, sizeof(Magic2)); SHA1_Final(Digest, &sha1Context); /* Convert to ASCII hex string. */ for (i = 0; i < MAX((MS_AUTH_RESPONSE_LENGTH / 2), sizeof(Digest)); i++) sprintf(&authResponse[i * 2], "%02X", Digest[i]); } #ifdef MPPE /* * Set mppe_xxxx_key from the NTPasswordHashHash. * RFC 2548 (RADIUS support) requires us to export this function (ugh). */ void mppe_set_keys(u_char *rchallenge, u_char PasswordHashHash[MD4_SIGNATURE_SIZE]) { SHA1_CTX sha1Context; u_char Digest[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */ SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE); SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE); SHA1_Update(&sha1Context, rchallenge, 8); SHA1_Final(Digest, &sha1Context); /* Same key in both directions. */ BCOPY(Digest, mppe_send_key, sizeof(mppe_send_key)); BCOPY(Digest, mppe_recv_key, sizeof(mppe_recv_key)); } /* * Set mppe_xxxx_key from MS-CHAP credentials. (see RFC 3079) */ static void Set_Start_Key(u_char *rchallenge, char *secret, int secret_len) { u_char unicodePassword[MAX_NT_PASSWORD * 2]; u_char PasswordHash[MD4_SIGNATURE_SIZE]; u_char PasswordHashHash[MD4_SIGNATURE_SIZE]; /* Hash (x2) the Unicode version of the secret (== password). */ ascii2unicode(secret, secret_len, unicodePassword); NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash); NTPasswordHash(PasswordHash, sizeof(PasswordHash), PasswordHashHash); mppe_set_keys(rchallenge, PasswordHashHash); } /* * Set mppe_xxxx_key from MS-CHAPv2 credentials. (see RFC 3079) */ static void SetMasterKeys(char *secret, int secret_len, u_char NTResponse[24], int IsServer) { SHA1_CTX sha1Context; u_char unicodePassword[MAX_NT_PASSWORD * 2]; u_char PasswordHash[MD4_SIGNATURE_SIZE]; u_char PasswordHashHash[MD4_SIGNATURE_SIZE]; u_char MasterKey[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */ u_char Digest[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */ u_char SHApad1[40] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; u_char SHApad2[40] = { 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2 }; /* "This is the MPPE Master Key" */ u_char Magic1[27] = { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x4d, 0x50, 0x50, 0x45, 0x20, 0x4d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x20, 0x4b, 0x65, 0x79 }; /* "On the client side, this is the send key; " "on the server side, it is the receive key." */ u_char Magic2[84] = { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20, 0x6b, 0x65, 0x79, 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20, 0x6b, 0x65, 0x79, 0x2e }; /* "On the client side, this is the receive key; " "on the server side, it is the send key." */ u_char Magic3[84] = { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20, 0x6b, 0x65, 0x79, 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20, 0x6b, 0x65, 0x79, 0x2e }; u_char *s; /* Hash (x2) the Unicode version of the secret (== password). */ ascii2unicode(secret, secret_len, unicodePassword); NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash); NTPasswordHash(PasswordHash, sizeof(PasswordHash), PasswordHashHash); SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, PasswordHashHash, sizeof(PasswordHashHash)); SHA1_Update(&sha1Context, NTResponse, 24); SHA1_Update(&sha1Context, Magic1, sizeof(Magic1)); SHA1_Final(MasterKey, &sha1Context); /* * generate send key */ if (IsServer) s = Magic3; else s = Magic2; SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, MasterKey, 16); SHA1_Update(&sha1Context, SHApad1, sizeof(SHApad1)); SHA1_Update(&sha1Context, s, 84); SHA1_Update(&sha1Context, SHApad2, sizeof(SHApad2)); SHA1_Final(Digest, &sha1Context); BCOPY(Digest, mppe_send_key, sizeof(mppe_send_key)); /* * generate recv key */ if (IsServer) s = Magic2; else s = Magic3; SHA1_Init(&sha1Context); SHA1_Update(&sha1Context, MasterKey, 16); SHA1_Update(&sha1Context, SHApad1, sizeof(SHApad1)); SHA1_Update(&sha1Context, s, 84); SHA1_Update(&sha1Context, SHApad2, sizeof(SHApad2)); SHA1_Final(Digest, &sha1Context); BCOPY(Digest, mppe_recv_key, sizeof(mppe_recv_key)); } #endif /* MPPE */ void ChapMS(chap_state *cstate, u_char *rchallenge, char *secret, int secret_len, MS_ChapResponse *response) { #if 0 CHAPDEBUG((LOG_INFO, "ChapMS: secret is '%.*s'", secret_len, secret)); #endif BZERO(response, sizeof(*response)); ChapMS_NT(rchallenge, secret, secret_len, response->NTResp); #ifdef MSLANMAN ChapMS_LANMan(rchallenge, secret, secret_len, response); /* preferred method is set by option */ response->UseNT[0] = !ms_lanman; #else response->UseNT[0] = 1; #endif cstate->resp_length = MS_CHAP_RESPONSE_LEN; #ifdef MPPE Set_Start_Key(rchallenge, secret, secret_len); #endif } /* * If PeerChallenge is NULL, one is generated and response->PeerChallenge * is filled in. Call this way when generating a response. * If PeerChallenge is supplied, it is copied into response->PeerChallenge. * Call this way when verifying a response (or debugging). * Do not call with PeerChallenge = response->PeerChallenge. * * response->PeerChallenge is then used for calculation of the * Authenticator Response. */ void ChapMS2(chap_state *cstate, u_char *rchallenge, u_char *PeerChallenge, char *user, char *secret, int secret_len, MS_Chap2Response *response, u_char authResponse[MS_AUTH_RESPONSE_LENGTH+1], int authenticator) { /* ARGSUSED */ u_char *p = response->PeerChallenge; int i; BZERO(response, sizeof(*response)); /* Generate the Peer-Challenge if requested, or copy it if supplied. */ if (!PeerChallenge) for (i = 0; i < sizeof(response->PeerChallenge); i++) *p++ = (u_char) (drand48() * 0xff); else BCOPY(PeerChallenge, response->PeerChallenge, sizeof(response->PeerChallenge)); /* Generate the NT-Response */ ChapMS2_NT(rchallenge, response->PeerChallenge, user, secret, secret_len, response->NTResp); /* Generate the Authenticator Response. */ GenerateAuthenticatorResponse(secret, secret_len, response->NTResp, response->PeerChallenge, rchallenge, user, authResponse); cstate->resp_length = MS_CHAP2_RESPONSE_LEN; #ifdef MPPE SetMasterKeys(secret, secret_len, response->NTResp, authenticator); #endif } #endif /* CHAPMS */