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@ -0,0 +1,898 @@
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From d706c95906d996534f13632a747af5dc617f306e Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eivind=20N=C3=A6ss?= <eivnaes@yahoo.com>
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Date: Sat, 24 Apr 2021 03:00:34 -0700
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Subject: [PATCH] pppd: Expose the MPPE keys generated through an API (#267)
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The lengthy part of this fix is to refactor the handling of MPPE keys
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by moving it into mppe.c and thus reducing the clutter in chap_ms.c.
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It does so by renaming the mppe_set_keys/2 to the corresponding
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mppe_set_chapv1/mppe_set_chapv2 versions and updates callers of these
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functions.
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Having done so, it conveniently allows the name "mppe_set_keys" to be
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re-used for this new purpose which will copy the key material up to
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its size and then clear the input parameters (avoids leaving the MPPE
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keys on the stack).
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Additional functiions added to the MPPE code allow plugins et al. to
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access the MPPE keys, clear the keys, and check if they are set. All
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plugin and CCP code has been updated to use this API.
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This fixes GitHub Issue #258
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Signed-off-by: Eivind Naess <eivnaes@yahoo.com>
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---
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pppd/Makefile.linux | 2 +
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pppd/Makefile.sol2 | 2 +-
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pppd/ccp.c | 15 +--
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pppd/chap_ms.c | 167 +----------------------
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pppd/chap_ms.h | 22 +---
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pppd/eap-tls.c | 21 +--
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pppd/eap-tls.h | 5 -
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pppd/mppe.c | 248 +++++++++++++++++++++++++++++++++++
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pppd/mppe.h | 70 +++++++++-
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pppd/plugins/radius/radius.c | 14 +-
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pppd/plugins/winbind.c | 8 +-
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11 files changed, 348 insertions(+), 226 deletions(-)
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create mode 100644 pppd/mppe.c
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diff --git a/pppd/Makefile.linux b/pppd/Makefile.linux
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index f92f7c0..852945e 100644
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--- a/pppd/Makefile.linux
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+++ b/pppd/Makefile.linux
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@@ -109,6 +109,8 @@ CFLAGS += -DMSLANMAN=1
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endif
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ifdef MPPE
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CFLAGS += -DMPPE=1
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+PPPDOBJS += mppe.o
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+PPPDSRC += mppe.c
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HEADERS += mppe.h
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endif
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endif
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diff --git a/pppd/Makefile.sol2 b/pppd/Makefile.sol2
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index 809cb4b..3a8681c 100644
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--- a/pppd/Makefile.sol2
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+++ b/pppd/Makefile.sol2
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@@ -37,7 +37,7 @@ OBJS += ipv6cp.o eui64.o
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# Uncomment to enable MS-CHAP
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CFLAGS += -DUSE_CRYPT -DCHAPMS -DMSLANMAN -DHAVE_CRYPT_H
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-OBJS += chap_ms.o pppcrypt.o md4.o sha1.o
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+OBJS += chap_ms.o pppcrypt.o md4.o sha1.o mppe.o
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# Uncomment to enable MPPE (in both CHAP and EAP-TLS)
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CFLAGS += -DMPPE
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diff --git a/pppd/ccp.c b/pppd/ccp.c
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index 052c4c6..387b571 100644
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--- a/pppd/ccp.c
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+++ b/pppd/ccp.c
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@@ -38,10 +38,9 @@
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#include "ccp.h"
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#include <net/ppp-comp.h>
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-#ifdef MPPE
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-#include "chap_ms.h" /* mppe_xxxx_key, mppe_keys_set */
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+#include "chap_ms.h"
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+#include "mppe.h"
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#include "lcp.h" /* lcp_close(), lcp_fsm */
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-#endif
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/*
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@@ -574,7 +573,7 @@ ccp_resetci(fsm *f)
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}
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/* A plugin (eg radius) may not have obtained key material. */
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- if (!mppe_keys_set) {
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+ if (!mppe_keys_isset()) {
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error("MPPE required, but keys are not available. "
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"Possible plugin problem?");
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lcp_close(f->unit, "MPPE required but not available");
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@@ -705,7 +704,7 @@ static void
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p[1] = opt_buf[1] = CILEN_MPPE;
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MPPE_OPTS_TO_CI(go->mppe, &p[2]);
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MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]);
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- BCOPY(mppe_recv_key, &opt_buf[CILEN_MPPE], MPPE_MAX_KEY_LEN);
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+ mppe_get_recv_key(&opt_buf[CILEN_MPPE], MPPE_MAX_KEY_LEN);
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res = ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0);
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if (res > 0)
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p += CILEN_MPPE;
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@@ -1156,8 +1155,7 @@ ccp_reqci(fsm *f, u_char *p, int *lenp, int dont_nak)
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int mtu;
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BCOPY(p, opt_buf, CILEN_MPPE);
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- BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
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- MPPE_MAX_KEY_LEN);
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+ mppe_get_send_key(&opt_buf[CILEN_MPPE], MPPE_MAX_KEY_LEN);
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if (ccp_test(f->unit, opt_buf,
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CILEN_MPPE + MPPE_MAX_KEY_LEN, 1) <= 0) {
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/* This shouldn't happen, we've already tested it! */
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@@ -1426,8 +1424,7 @@ ccp_up(fsm *f)
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notice("%s transmit compression enabled", method_name(ho, NULL));
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#ifdef MPPE
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if (go->mppe) {
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- BZERO(mppe_recv_key, MPPE_MAX_KEY_LEN);
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- BZERO(mppe_send_key, MPPE_MAX_KEY_LEN);
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+ mppe_clear_keys();
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continue_networks(f->unit); /* Bring up IP et al */
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}
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#endif
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diff --git a/pppd/chap_ms.c b/pppd/chap_ms.c
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index df2dadd..d315ab4 100644
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--- a/pppd/chap_ms.c
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+++ b/pppd/chap_ms.c
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@@ -93,8 +93,7 @@
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#include "sha1.h"
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#include "pppcrypt.h"
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#include "magic.h"
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-
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-
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+#include "mppe.h"
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static void ascii2unicode (char[], int, u_char[]);
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static void NTPasswordHash (u_char *, int, u_char[MD4_SIGNATURE_SIZE]);
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@@ -109,21 +108,12 @@ static void GenerateAuthenticatorResponsePlain
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static void ChapMS_LANMan (u_char *, char *, int, u_char *);
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#endif
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-#ifdef MPPE
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-static void Set_Start_Key (u_char *, char *, int);
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-static void SetMasterKeys (char *, int, u_char[24], int);
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-#endif
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-
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#ifdef MSLANMAN
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bool ms_lanman = 0; /* Use LanMan password instead of NT */
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/* Has meaning only with MS-CHAP challenges */
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#endif
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#ifdef MPPE
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-u_char mppe_send_key[MPPE_MAX_KEY_LEN];
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-u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
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-int mppe_keys_set = 0; /* Have the MPPE keys been set? */
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-
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#ifdef DEBUGMPPEKEY
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/* For MPPE debug */
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/* Use "[]|}{?/><,`!2&&(" (sans quotes) for RFC 3079 MS-CHAPv2 test value */
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@@ -719,28 +709,6 @@ GenerateAuthenticatorResponsePlain
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#ifdef MPPE
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-/*
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- * Set mppe_xxxx_key from the NTPasswordHashHash.
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- * RFC 2548 (RADIUS support) requires us to export this function (ugh).
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- */
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-void
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-mppe_set_keys(u_char *rchallenge, u_char PasswordHashHash[MD4_SIGNATURE_SIZE])
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-{
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- SHA1_CTX sha1Context;
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- u_char Digest[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */
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-
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- SHA1_Init(&sha1Context);
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- SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE);
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- SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE);
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- SHA1_Update(&sha1Context, rchallenge, 8);
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- SHA1_Final(Digest, &sha1Context);
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-
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- /* Same key in both directions. */
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- BCOPY(Digest, mppe_send_key, sizeof(mppe_send_key));
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- BCOPY(Digest, mppe_recv_key, sizeof(mppe_recv_key));
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-
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- mppe_keys_set = 1;
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-}
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/*
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* Set mppe_xxxx_key from MS-CHAP credentials. (see RFC 3079)
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@@ -757,104 +725,7 @@ Set_Start_Key(u_char *rchallenge, char *secret, int secret_len)
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NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash);
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NTPasswordHash(PasswordHash, sizeof(PasswordHash), PasswordHashHash);
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- mppe_set_keys(rchallenge, PasswordHashHash);
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-}
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-
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-/*
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- * Set mppe_xxxx_key from MS-CHAPv2 credentials. (see RFC 3079)
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- *
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- * This helper function used in the Winbind module, which gets the
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- * NTHashHash from the server.
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- */
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-void
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-mppe_set_keys2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
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- u_char NTResponse[24], int IsServer)
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-{
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- SHA1_CTX sha1Context;
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- u_char MasterKey[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */
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- u_char Digest[SHA1_SIGNATURE_SIZE]; /* >= MPPE_MAX_KEY_LEN */
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-
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- u_char SHApad1[40] =
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- { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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- u_char SHApad2[40] =
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- { 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
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- 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
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- 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
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- 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2 };
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-
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- /* "This is the MPPE Master Key" */
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- u_char Magic1[27] =
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- { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74,
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- 0x68, 0x65, 0x20, 0x4d, 0x50, 0x50, 0x45, 0x20, 0x4d,
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- 0x61, 0x73, 0x74, 0x65, 0x72, 0x20, 0x4b, 0x65, 0x79 };
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- /* "On the client side, this is the send key; "
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- "on the server side, it is the receive key." */
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- u_char Magic2[84] =
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- { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
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- 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
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- 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
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- 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20, 0x6b, 0x65, 0x79,
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- 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73,
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- 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73, 0x69, 0x64, 0x65,
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- 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
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- 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
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- 0x6b, 0x65, 0x79, 0x2e };
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- /* "On the client side, this is the receive key; "
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- "on the server side, it is the send key." */
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- u_char Magic3[84] =
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- { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
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- 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
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- 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
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- 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
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- 0x6b, 0x65, 0x79, 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68,
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- 0x65, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73,
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- 0x69, 0x64, 0x65, 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73,
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- 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20,
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- 0x6b, 0x65, 0x79, 0x2e };
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- u_char *s;
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-
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- SHA1_Init(&sha1Context);
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- SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE);
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- SHA1_Update(&sha1Context, NTResponse, 24);
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- SHA1_Update(&sha1Context, Magic1, sizeof(Magic1));
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- SHA1_Final(MasterKey, &sha1Context);
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-
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- /*
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- * generate send key
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- */
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|
|
- 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));
|
|
|
|
|
-
|
|
|
|
|
- mppe_keys_set = 1;
|
|
|
|
|
+ mppe_set_chapv1(rchallenge, PasswordHashHash);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
@@ -870,7 +741,7 @@ SetMasterKeys(char *secret, int secret_len, u_char NTResponse[24], int IsServer)
|
|
|
|
|
ascii2unicode(secret, secret_len, unicodePassword);
|
|
|
|
|
NTPasswordHash(unicodePassword, secret_len * 2, PasswordHash);
|
|
|
|
|
NTPasswordHash(PasswordHash, sizeof(PasswordHash), PasswordHashHash);
|
|
|
|
|
- mppe_set_keys2(PasswordHashHash, NTResponse, IsServer);
|
|
|
|
|
+ mppe_set_chapv2(PasswordHashHash, NTResponse, IsServer);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* MPPE */
|
|
|
|
|
@@ -945,38 +816,6 @@ ChapMS2(u_char *rchallenge, u_char *PeerChallenge,
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
-#ifdef MPPE
|
|
|
|
|
-/*
|
|
|
|
|
- * Set MPPE options from plugins.
|
|
|
|
|
- */
|
|
|
|
|
-void
|
|
|
|
|
-set_mppe_enc_types(int policy, int types)
|
|
|
|
|
-{
|
|
|
|
|
- /* Early exit for unknown policies. */
|
|
|
|
|
- if (policy != MPPE_ENC_POL_ENC_ALLOWED &&
|
|
|
|
|
- policy != MPPE_ENC_POL_ENC_REQUIRED)
|
|
|
|
|
- return;
|
|
|
|
|
-
|
|
|
|
|
- /* Don't modify MPPE if it's optional and wasn't already configured. */
|
|
|
|
|
- if (policy == MPPE_ENC_POL_ENC_ALLOWED && !ccp_wantoptions[0].mppe)
|
|
|
|
|
- return;
|
|
|
|
|
-
|
|
|
|
|
- /*
|
|
|
|
|
- * Disable undesirable encryption types. Note that we don't ENABLE
|
|
|
|
|
- * any encryption types, to avoid overriding manual configuration.
|
|
|
|
|
- */
|
|
|
|
|
- switch(types) {
|
|
|
|
|
- case MPPE_ENC_TYPES_RC4_40:
|
|
|
|
|
- ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */
|
|
|
|
|
- break;
|
|
|
|
|
- case MPPE_ENC_TYPES_RC4_128:
|
|
|
|
|
- ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */
|
|
|
|
|
- break;
|
|
|
|
|
- default:
|
|
|
|
|
- break;
|
|
|
|
|
- }
|
|
|
|
|
-}
|
|
|
|
|
-#endif /* MPPE */
|
|
|
|
|
|
|
|
|
|
static struct chap_digest_type chapms_digest = {
|
|
|
|
|
CHAP_MICROSOFT, /* code */
|
|
|
|
|
diff --git a/pppd/chap_ms.h b/pppd/chap_ms.h
|
|
|
|
|
index 005eb63..4e6a621 100644
|
|
|
|
|
--- a/pppd/chap_ms.h
|
|
|
|
|
+++ b/pppd/chap_ms.h
|
|
|
|
|
@@ -38,6 +38,7 @@
|
|
|
|
|
#define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */
|
|
|
|
|
#define MS_CHAP2_RESPONSE_LEN 49 /* Response length for MS-CHAPv2 */
|
|
|
|
|
#define MS_AUTH_RESPONSE_LENGTH 40 /* MS-CHAPv2 authenticator response, */
|
|
|
|
|
+#define MS_AUTH_NTRESP_LEN 24 /* Length of NT-response field */
|
|
|
|
|
/* as ASCII */
|
|
|
|
|
|
|
|
|
|
/* E=eeeeeeeeee error codes for MS-CHAP failure messages. */
|
|
|
|
|
@@ -67,22 +68,6 @@
|
|
|
|
|
#define MS_CHAP2_NTRESP_LEN 24
|
|
|
|
|
#define MS_CHAP2_FLAGS 48
|
|
|
|
|
|
|
|
|
|
-#ifdef MPPE
|
|
|
|
|
-#include "mppe.h" /* MPPE_MAX_KEY_LEN */
|
|
|
|
|
-extern u_char mppe_send_key[MPPE_MAX_KEY_LEN];
|
|
|
|
|
-extern u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
|
|
|
|
|
-extern int mppe_keys_set;
|
|
|
|
|
-
|
|
|
|
|
-/* These values are the RADIUS attribute values--see RFC 2548. */
|
|
|
|
|
-#define MPPE_ENC_POL_ENC_ALLOWED 1
|
|
|
|
|
-#define MPPE_ENC_POL_ENC_REQUIRED 2
|
|
|
|
|
-#define MPPE_ENC_TYPES_RC4_40 2
|
|
|
|
|
-#define MPPE_ENC_TYPES_RC4_128 4
|
|
|
|
|
-
|
|
|
|
|
-/* used by plugins (using above values) */
|
|
|
|
|
-extern void set_mppe_enc_types(int, int);
|
|
|
|
|
-#endif
|
|
|
|
|
-
|
|
|
|
|
/* Are we the authenticator or authenticatee? For MS-CHAPv2 key derivation. */
|
|
|
|
|
#define MS_CHAP2_AUTHENTICATEE 0
|
|
|
|
|
#define MS_CHAP2_AUTHENTICATOR 1
|
|
|
|
|
@@ -90,11 +75,6 @@ extern void set_mppe_enc_types(int, int);
|
|
|
|
|
void ChapMS (u_char *, char *, int, u_char *);
|
|
|
|
|
void ChapMS2 (u_char *, u_char *, char *, char *, int,
|
|
|
|
|
u_char *, u_char[MS_AUTH_RESPONSE_LENGTH+1], int);
|
|
|
|
|
-#ifdef MPPE
|
|
|
|
|
-void mppe_set_keys (u_char *, u_char[MD4_SIGNATURE_SIZE]);
|
|
|
|
|
-void mppe_set_keys2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
|
|
|
|
|
- u_char NTResponse[24], int IsServer);
|
|
|
|
|
-#endif
|
|
|
|
|
|
|
|
|
|
void ChallengeHash (u_char[16], u_char *, char *, u_char[8]);
|
|
|
|
|
|
|
|
|
|
diff --git a/pppd/eap-tls.c b/pppd/eap-tls.c
|
|
|
|
|
index 5c202c7..bfcf199 100644
|
|
|
|
|
--- a/pppd/eap-tls.c
|
|
|
|
|
+++ b/pppd/eap-tls.c
|
|
|
|
|
@@ -48,6 +48,8 @@
|
|
|
|
|
#include "eap-tls.h"
|
|
|
|
|
#include "fsm.h"
|
|
|
|
|
#include "lcp.h"
|
|
|
|
|
+#include "chap_ms.h"
|
|
|
|
|
+#include "mppe.h"
|
|
|
|
|
#include "pathnames.h"
|
|
|
|
|
|
|
|
|
|
typedef struct pw_cb_data
|
|
|
|
|
@@ -74,10 +76,6 @@ int ssl_new_session_cb(SSL *s, SSL_SESSION *sess);
|
|
|
|
|
X509 *get_X509_from_file(char *filename);
|
|
|
|
|
int ssl_cmp_certs(char *filename, X509 * a);
|
|
|
|
|
|
|
|
|
|
-#ifdef MPPE
|
|
|
|
|
-
|
|
|
|
|
-#define EAPTLS_MPPE_KEY_LEN 32
|
|
|
|
|
-
|
|
|
|
|
/*
|
|
|
|
|
* OpenSSL 1.1+ introduced a generic TLS_method()
|
|
|
|
|
* For older releases we substitute the appropriate method
|
|
|
|
|
@@ -119,6 +117,8 @@ static inline int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, long tls_ver_max)
|
|
|
|
|
|
|
|
|
|
#endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
|
|
|
|
|
|
|
|
|
|
+#ifdef MPPE
|
|
|
|
|
+#define EAPTLS_MPPE_KEY_LEN 32
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Generate keys according to RFC 2716 and add to reply
|
|
|
|
|
@@ -161,24 +161,17 @@ void eaptls_gen_mppe_keys(struct eaptls_session *ets, int client)
|
|
|
|
|
*/
|
|
|
|
|
if (client)
|
|
|
|
|
{
|
|
|
|
|
- p = out;
|
|
|
|
|
- BCOPY( p, mppe_send_key, sizeof(mppe_send_key) );
|
|
|
|
|
- p += EAPTLS_MPPE_KEY_LEN;
|
|
|
|
|
- BCOPY( p, mppe_recv_key, sizeof(mppe_recv_key) );
|
|
|
|
|
+ mppe_set_keys(out, out + EAPTLS_MPPE_KEY_LEN, EAPTLS_MPPE_KEY_LEN);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
- p = out;
|
|
|
|
|
- BCOPY( p, mppe_recv_key, sizeof(mppe_recv_key) );
|
|
|
|
|
- p += EAPTLS_MPPE_KEY_LEN;
|
|
|
|
|
- BCOPY( p, mppe_send_key, sizeof(mppe_send_key) );
|
|
|
|
|
+ mppe_set_keys(out + EAPTLS_MPPE_KEY_LEN, out, EAPTLS_MPPE_KEY_LEN);
|
|
|
|
|
}
|
|
|
|
|
-
|
|
|
|
|
- mppe_keys_set = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* MPPE */
|
|
|
|
|
|
|
|
|
|
+
|
|
|
|
|
void log_ssl_errors( void )
|
|
|
|
|
{
|
|
|
|
|
unsigned long ssl_err = ERR_get_error();
|
|
|
|
|
diff --git a/pppd/eap-tls.h b/pppd/eap-tls.h
|
|
|
|
|
index c74a831..b935ec5 100644
|
|
|
|
|
--- a/pppd/eap-tls.h
|
|
|
|
|
+++ b/pppd/eap-tls.h
|
|
|
|
|
@@ -86,11 +86,6 @@ int get_eaptls_secret(int unit, char *client, char *server,
|
|
|
|
|
char *capath, char *pkfile, int am_server);
|
|
|
|
|
|
|
|
|
|
#ifdef MPPE
|
|
|
|
|
-#include "mppe.h" /* MPPE_MAX_KEY_LEN */
|
|
|
|
|
-extern u_char mppe_send_key[MPPE_MAX_KEY_LEN];
|
|
|
|
|
-extern u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
|
|
|
|
|
-extern int mppe_keys_set;
|
|
|
|
|
-
|
|
|
|
|
void eaptls_gen_mppe_keys(struct eaptls_session *ets, int client);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
diff --git a/pppd/mppe.c b/pppd/mppe.c
|
|
|
|
|
new file mode 100644
|
|
|
|
|
index 0000000..4f3d131
|
|
|
|
|
--- /dev/null
|
|
|
|
|
+++ b/pppd/mppe.c
|
|
|
|
|
@@ -0,0 +1,248 @@
|
|
|
|
|
+/* * mppe.c - MPPE key implementation
|
|
|
|
|
+ *
|
|
|
|
|
+ * Copyright (c) 2020 Eivind Naess. All rights reserved.
|
|
|
|
|
+ * Copyright (c) 2008 Paul Mackerras. 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.
|
|
|
|
|
+ *
|
|
|
|
|
+ */
|
|
|
|
|
+
|
|
|
|
|
+#include <string.h>
|
|
|
|
|
+
|
|
|
|
|
+#include "pppd.h"
|
|
|
|
|
+#include "fsm.h"
|
|
|
|
|
+#include "md4.h"
|
|
|
|
|
+#include "sha1.h"
|
|
|
|
|
+#include "ccp.h"
|
|
|
|
|
+#include "chap_ms.h"
|
|
|
|
|
+#include "mppe.h"
|
|
|
|
|
+
|
|
|
|
|
+u_char mppe_send_key[MPPE_MAX_KEY_SIZE];
|
|
|
|
|
+u_char mppe_recv_key[MPPE_MAX_KEY_SIZE];
|
|
|
|
|
+int mppe_keys_set = 0;
|
|
|
|
|
+
|
|
|
|
|
+void
|
|
|
|
|
+mppe_set_keys(u_char *send_key, u_char *recv_key, int keylen)
|
|
|
|
|
+{
|
|
|
|
|
+ int length = keylen;
|
|
|
|
|
+ if (length > MPPE_MAX_KEY_SIZE)
|
|
|
|
|
+ length = MPPE_MAX_KEY_SIZE;
|
|
|
|
|
+
|
|
|
|
|
+ if (send_key) {
|
|
|
|
|
+ BCOPY(send_key, mppe_send_key, length);
|
|
|
|
|
+ BZERO(send_key, keylen);
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ if (recv_key) {
|
|
|
|
|
+ BCOPY(recv_key, mppe_recv_key, length);
|
|
|
|
|
+ BZERO(recv_key, keylen);
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ mppe_keys_set = length;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+bool
|
|
|
|
|
+mppe_keys_isset()
|
|
|
|
|
+{
|
|
|
|
|
+ return !!mppe_keys_set;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+int
|
|
|
|
|
+mppe_get_recv_key(u_char *recv_key, int length)
|
|
|
|
|
+{
|
|
|
|
|
+ if (mppe_keys_isset()) {
|
|
|
|
|
+ if (length > mppe_keys_set)
|
|
|
|
|
+ length = mppe_keys_set;
|
|
|
|
|
+ BCOPY(mppe_recv_key, recv_key, length);
|
|
|
|
|
+ return length;
|
|
|
|
|
+ }
|
|
|
|
|
+ return 0;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+int
|
|
|
|
|
+mppe_get_send_key(u_char *send_key, int length)
|
|
|
|
|
+{
|
|
|
|
|
+ if (mppe_keys_isset()) {
|
|
|
|
|
+ if (length > mppe_keys_set)
|
|
|
|
|
+ length = mppe_keys_set;
|
|
|
|
|
+ BCOPY(mppe_send_key, send_key, length);
|
|
|
|
|
+ return length;
|
|
|
|
|
+ }
|
|
|
|
|
+ return 0;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+void
|
|
|
|
|
+mppe_clear_keys(void)
|
|
|
|
|
+{
|
|
|
|
|
+ mppe_keys_set = 0;
|
|
|
|
|
+ BZERO(mppe_send_key, sizeof(mppe_send_key));
|
|
|
|
|
+ BZERO(mppe_recv_key, sizeof(mppe_recv_key));
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set mppe_xxxx_key from the NTPasswordHashHash.
|
|
|
|
|
+ * RFC 2548 (RADIUS support) requires us to export this function (ugh).
|
|
|
|
|
+ */
|
|
|
|
|
+void
|
|
|
|
|
+mppe_set_chapv1(u_char *rchallenge, u_char PasswordHashHash[MD4_SIGNATURE_SIZE])
|
|
|
|
|
+{
|
|
|
|
|
+ SHA1_CTX sha1Context;
|
|
|
|
|
+ u_char Digest[SHA1_SIGNATURE_SIZE];
|
|
|
|
|
+
|
|
|
|
|
+ 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. */
|
|
|
|
|
+ mppe_set_keys(Digest, Digest, sizeof(Digest));
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set mppe_xxxx_key from MS-CHAPv2 credentials. (see RFC 3079)
|
|
|
|
|
+ *
|
|
|
|
|
+ * This helper function used in the Winbind module, which gets the
|
|
|
|
|
+ * NTHashHash from the server.
|
|
|
|
|
+ */
|
|
|
|
|
+void
|
|
|
|
|
+mppe_set_chapv2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
|
|
|
|
|
+ u_char NTResponse[MS_AUTH_NTRESP_LEN], int IsServer)
|
|
|
|
|
+{
|
|
|
|
|
+ SHA1_CTX sha1Context;
|
|
|
|
|
+ u_char MasterKey[SHA1_SIGNATURE_SIZE];
|
|
|
|
|
+ u_char SendKey[SHA1_SIGNATURE_SIZE];
|
|
|
|
|
+ u_char RecvKey[SHA1_SIGNATURE_SIZE];
|
|
|
|
|
+
|
|
|
|
|
+ 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;
|
|
|
|
|
+
|
|
|
|
|
+ SHA1_Init(&sha1Context);
|
|
|
|
|
+ SHA1_Update(&sha1Context, PasswordHashHash, MD4_SIGNATURE_SIZE);
|
|
|
|
|
+ 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(SendKey, &sha1Context);
|
|
|
|
|
+
|
|
|
|
|
+ /*
|
|
|
|
|
+ * 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(RecvKey, &sha1Context);
|
|
|
|
|
+
|
|
|
|
|
+ mppe_set_keys(SendKey, RecvKey, SHA1_SIGNATURE_SIZE);
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set MPPE options from plugins.
|
|
|
|
|
+ */
|
|
|
|
|
+void
|
|
|
|
|
+mppe_set_enc_types(int policy, int types)
|
|
|
|
|
+{
|
|
|
|
|
+ /* Early exit for unknown policies. */
|
|
|
|
|
+ if (policy != MPPE_ENC_POL_ENC_ALLOWED &&
|
|
|
|
|
+ policy != MPPE_ENC_POL_ENC_REQUIRED)
|
|
|
|
|
+ return;
|
|
|
|
|
+
|
|
|
|
|
+ /* Don't modify MPPE if it's optional and wasn't already configured. */
|
|
|
|
|
+ if (policy == MPPE_ENC_POL_ENC_ALLOWED && !ccp_wantoptions[0].mppe)
|
|
|
|
|
+ return;
|
|
|
|
|
+
|
|
|
|
|
+ /*
|
|
|
|
|
+ * Disable undesirable encryption types. Note that we don't ENABLE
|
|
|
|
|
+ * any encryption types, to avoid overriding manual configuration.
|
|
|
|
|
+ */
|
|
|
|
|
+ switch(types) {
|
|
|
|
|
+ case MPPE_ENC_TYPES_RC4_40:
|
|
|
|
|
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */
|
|
|
|
|
+ break;
|
|
|
|
|
+ case MPPE_ENC_TYPES_RC4_128:
|
|
|
|
|
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */
|
|
|
|
|
+ break;
|
|
|
|
|
+ default:
|
|
|
|
|
+ break;
|
|
|
|
|
+ }
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
diff --git a/pppd/mppe.h b/pppd/mppe.h
|
|
|
|
|
index 5eb3b37..98a89d3 100644
|
|
|
|
|
--- a/pppd/mppe.h
|
|
|
|
|
+++ b/pppd/mppe.h
|
|
|
|
|
@@ -32,9 +32,12 @@
|
|
|
|
|
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
|
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
|
*/
|
|
|
|
|
+#ifndef __MPPE_H__
|
|
|
|
|
+#define __MPPE_H__
|
|
|
|
|
|
|
|
|
|
#define MPPE_PAD 4 /* MPPE growth per frame */
|
|
|
|
|
-#define MPPE_MAX_KEY_LEN 16 /* largest key length (128-bit) */
|
|
|
|
|
+#define MPPE_MAX_KEY_SIZE 32 /* Largest key length */
|
|
|
|
|
+#define MPPE_MAX_KEY_LEN 16 /* Largest key size accepted by the kernel */
|
|
|
|
|
|
|
|
|
|
/* option bits for ccp_options.mppe */
|
|
|
|
|
#define MPPE_OPT_40 0x01 /* 40 bit */
|
|
|
|
|
@@ -119,3 +122,68 @@
|
|
|
|
|
if (ptr[3] & ~MPPE_ALL_BITS) \
|
|
|
|
|
opts |= MPPE_OPT_UNKNOWN; \
|
|
|
|
|
} while (/* CONSTCOND */ 0)
|
|
|
|
|
+
|
|
|
|
|
+
|
|
|
|
|
+#if MPPE
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * NOTE:
|
|
|
|
|
+ * Access to these variables directly is discuraged. Please
|
|
|
|
|
+ * change your code to use below accessor functions.
|
|
|
|
|
+ */
|
|
|
|
|
+
|
|
|
|
|
+/* The key material generated which is used for MPPE send key */
|
|
|
|
|
+extern u_char mppe_send_key[MPPE_MAX_KEY_SIZE];
|
|
|
|
|
+/* The key material generated which is used for MPPE recv key */
|
|
|
|
|
+extern u_char mppe_recv_key[MPPE_MAX_KEY_SIZE];
|
|
|
|
|
+/* Keys are set if value is non-zero */
|
|
|
|
|
+extern int mppe_keys_set;
|
|
|
|
|
+
|
|
|
|
|
+/* These values are the RADIUS attribute values--see RFC 2548. */
|
|
|
|
|
+#define MPPE_ENC_POL_ENC_ALLOWED 1
|
|
|
|
|
+#define MPPE_ENC_POL_ENC_REQUIRED 2
|
|
|
|
|
+#define MPPE_ENC_TYPES_RC4_40 2
|
|
|
|
|
+#define MPPE_ENC_TYPES_RC4_128 4
|
|
|
|
|
+
|
|
|
|
|
+/* used by plugins (using above values) */
|
|
|
|
|
+void mppe_set_enc_types (int policy, int types);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set the MPPE send and recv keys. NULL values for keys are ignored
|
|
|
|
|
+ * and input values are cleared to avoid leaving them on the stack
|
|
|
|
|
+ */
|
|
|
|
|
+void mppe_set_keys(u_char *send_key, u_char *recv_key, int keylen);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Get the MPPE recv key
|
|
|
|
|
+ */
|
|
|
|
|
+int mppe_get_recv_key(u_char *recv_key, int length);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Get the MPPE send key
|
|
|
|
|
+ */
|
|
|
|
|
+int mppe_get_send_key(u_char *send_key, int length);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Clear the MPPE keys
|
|
|
|
|
+ */
|
|
|
|
|
+void mppe_clear_keys(void);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Check if the MPPE keys are set
|
|
|
|
|
+ */
|
|
|
|
|
+bool mppe_keys_isset(void);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set mppe_xxxx_key from NT Password Hash Hash (MSCHAPv1), see RFC3079
|
|
|
|
|
+ */
|
|
|
|
|
+void mppe_set_chapv1(u_char *rchallenge, u_char PasswordHashHash[MD4_SIGNATURE_SIZE]);
|
|
|
|
|
+
|
|
|
|
|
+/*
|
|
|
|
|
+ * Set the mppe_xxxx_key from MS-CHAP-v2 credentials, see RFC3079
|
|
|
|
|
+ */
|
|
|
|
|
+void mppe_set_chapv2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
|
|
|
|
|
+ u_char NTResponse[MS_AUTH_NTRESP_LEN], int IsServer);
|
|
|
|
|
+
|
|
|
|
|
+#endif // #ifdef MPPE
|
|
|
|
|
+#endif // #ifdef __MPPE_H__
|
|
|
|
|
diff --git a/pppd/plugins/radius/radius.c b/pppd/plugins/radius/radius.c
|
|
|
|
|
index c579831..cf4c0f2 100644
|
|
|
|
|
--- a/pppd/plugins/radius/radius.c
|
|
|
|
|
+++ b/pppd/plugins/radius/radius.c
|
|
|
|
|
@@ -31,6 +31,7 @@ static char const RCSID[] =
|
|
|
|
|
#ifdef CHAPMS
|
|
|
|
|
#include "chap_ms.h"
|
|
|
|
|
#ifdef MPPE
|
|
|
|
|
+#include "mppe.h"
|
|
|
|
|
#include "md5.h"
|
|
|
|
|
#endif
|
|
|
|
|
#endif
|
|
|
|
|
@@ -743,11 +744,12 @@ radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
|
|
|
|
|
* Note that if the policy value was '0' we don't set the key!
|
|
|
|
|
*/
|
|
|
|
|
if (mppe_enc_policy && mppe_enc_keys) {
|
|
|
|
|
- mppe_keys_set = 1;
|
|
|
|
|
/* Set/modify allowed encryption types. */
|
|
|
|
|
if (mppe_enc_types)
|
|
|
|
|
- set_mppe_enc_types(mppe_enc_policy, mppe_enc_types);
|
|
|
|
|
+ mppe_set_enc_types(mppe_enc_policy, mppe_enc_types);
|
|
|
|
|
+ return 0;
|
|
|
|
|
}
|
|
|
|
|
+ mppe_clear_keys();
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return 0;
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@@ -803,7 +805,7 @@ radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
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* the NAS (us) doesn't need; we only need the start key. So we have
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* to generate the start key, sigh. NB: We do not support the LM-Key.
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*/
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- mppe_set_keys(challenge, &plain[8]);
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+ mppe_set_chapv1(challenge, &plain[8]);
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return 0;
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}
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@@ -855,7 +857,7 @@ radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info)
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for (i = 0; i < 16; i++)
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plain[i] ^= buf[i];
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- if (plain[0] != sizeof(mppe_send_key) /* 16 */) {
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+ if (plain[0] != 16) {
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|
error("RADIUS: Incorrect key length (%d) for MS-MPPE-%s-Key attribute",
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|
|
|
(int) plain[0], type);
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|
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|
return -1;
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|
@@ -869,9 +871,9 @@ radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info)
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|
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|
plain[16] ^= buf[0]; /* only need the first byte */
|
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|
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|
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|
|
if (vp->attribute == PW_MS_MPPE_SEND_KEY)
|
|
|
|
|
- memcpy(mppe_send_key, plain + 1, 16);
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|
|
+ mppe_set_keys(plain + 1, NULL, 16);
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|
else
|
|
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|
|
- memcpy(mppe_recv_key, plain + 1, 16);
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|
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|
|
+ mppe_set_keys(NULL, plain + 1, 16);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
diff --git a/pppd/plugins/winbind.c b/pppd/plugins/winbind.c
|
|
|
|
|
index 0c395c3..67c72f6 100644
|
|
|
|
|
--- a/pppd/plugins/winbind.c
|
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|
|
+++ b/pppd/plugins/winbind.c
|
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|
|
|
@@ -37,11 +37,9 @@
|
|
|
|
|
#include "pppd.h"
|
|
|
|
|
#include "chap-new.h"
|
|
|
|
|
#include "chap_ms.h"
|
|
|
|
|
-#ifdef MPPE
|
|
|
|
|
-#include "md5.h"
|
|
|
|
|
-#endif
|
|
|
|
|
#include "fsm.h"
|
|
|
|
|
#include "ipcp.h"
|
|
|
|
|
+#include "mppe.h"
|
|
|
|
|
#include <syslog.h>
|
|
|
|
|
#include <sys/types.h>
|
|
|
|
|
#include <sys/stat.h>
|
|
|
|
|
@@ -583,7 +581,7 @@ winbind_chap_verify(char *user, char *ourname, int id,
|
|
|
|
|
nt_response, nt_response_size,
|
|
|
|
|
session_key,
|
|
|
|
|
&error_string) == AUTHENTICATED) {
|
|
|
|
|
- mppe_set_keys(challenge, session_key);
|
|
|
|
|
+ mppe_set_chapv1(challenge, session_key);
|
|
|
|
|
slprintf(message, message_space, "Access granted");
|
|
|
|
|
return AUTHENTICATED;
|
|
|
|
|
|
|
|
|
|
@@ -628,7 +626,7 @@ winbind_chap_verify(char *user, char *ourname, int id,
|
|
|
|
|
&response[MS_CHAP2_NTRESP],
|
|
|
|
|
&response[MS_CHAP2_PEER_CHALLENGE],
|
|
|
|
|
challenge, user, saresponse);
|
|
|
|
|
- mppe_set_keys2(session_key, &response[MS_CHAP2_NTRESP],
|
|
|
|
|
+ mppe_set_chapv2(session_key, &response[MS_CHAP2_NTRESP],
|
|
|
|
|
MS_CHAP2_AUTHENTICATOR);
|
|
|
|
|
if (response[MS_CHAP2_FLAGS]) {
|
|
|
|
|
slprintf(message, message_space, "S=%s", saresponse);
|
|
|
|
|
--
|
|
|
|
|
2.34.1
|
|
|
|
|
|
David Abdurachmanov
Fedora Release Engineering
Jaroslav Škarvada
Marcin Zajączkowski
Sahana Prasad