re-instate local md5.[ch] due to issues with linking openssl to GPL code

Changes

@@ -1,12 +1,12 @@
-* Tue Aug 2 2005 Brendan O'Dea <bod@optus.net> 2.1.2
+* Wed Aug 10 2005 Brendan O'Dea <bod@optus.net> 2.1.2
 - Clear cluster_master on election so that slaves will accept a new master.
 - Provide more comments/defaults in etc/startup-config.default.
 - Add DAE support (PoD/CoA) from Vladislav Bjelic.
 - Clean up new warnings from gcc 4.0.
 - Replace flags used for LCP/IPCP with state machine.
-- Use openssl MD5, fix DAE vector (Alex Kiernan).
 - Include Acct-Session-Time in interim records.
-- Fix generateload (Alex Kiernan).
+- Fix DAE vector, generateload (Alex Kiernan).
+- Replace RSA MD5 with public domain version.
 
 * Tue Jun 14 2005 Brendan O'Dea <bod@optusnet.com.au> 2.1.1
 - Add missing newline to backtrace macro.

Makefile

@@ -26,7 +26,7 @@ INSTALL = install -c -D -o root -g root
 l2tpns.LIBS = -lcrypto -lm -lcli -ldl
 
 OBJS = arp.o cli.o cluster.o constants.o control.o icmp.o l2tpns.o \
-    ll.o ppp.o radius.o tbf.o util.o
+    ll.o md5.o ppp.o radius.o tbf.o util.o
 
 PROGRAMS = l2tpns nsctl
 PLUGINS = autosnoop.so autothrottle.so garden.so sessionctl.so \
@@ -114,14 +114,15 @@ cluster.o: cluster.c l2tpns.h cluster.h util.h tbf.h bgp.h
 constants.o: constants.c constants.h
 control.o: control.c l2tpns.h control.h
 icmp.o: icmp.c l2tpns.h
-l2tpns.o: l2tpns.c l2tpns.h cluster.h plugin.h ll.h constants.h control.h \
+l2tpns.o: l2tpns.c md5.h l2tpns.h cluster.h plugin.h ll.h constants.h \
-  util.h tbf.h bgp.h fake_epoll.h
+  control.h util.h tbf.h bgp.h
 ll.o: ll.c ll.h
+md5.o: md5.c md5.h
 ppp.o: ppp.c l2tpns.h constants.h plugin.h util.h tbf.h cluster.h
 radius.o: radius.c constants.h l2tpns.h plugin.h util.h cluster.h
 tbf.o: tbf.c l2tpns.h util.h tbf.h
 util.o: util.c l2tpns.h bgp.h
-bgp.o: bgp.c l2tpns.h bgp.h util.h fake_epoll.h
+bgp.o: bgp.c l2tpns.h bgp.h util.h
 autosnoop.so: autosnoop.c l2tpns.h plugin.h
 autothrottle.so: autothrottle.c l2tpns.h plugin.h
 garden.so: garden.c l2tpns.h plugin.h control.h

l2tpns.c

@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.115 2005-07-31 10:04:10 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.116 2005-08-10 07:25:24 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -38,9 +38,9 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.115 2005-07-31 10:04:10 bodea Exp
 #include <unistd.h>
 #include <sched.h>
 #include <sys/sysinfo.h>
-#include <openssl/md5.h>
 #include <libcli.h>
 
+#include "md5.h"
 #include "l2tpns.h"
 #include "cluster.h"
 #include "plugin.h"

l2tpns.spec

@@ -8,8 +8,8 @@ Source: http://optusnet.dl.sourceforge.net/sourceforge/l2tpns/l2tpns-%{version}.
 URL: http://sourceforge.net/projects/l2tpns
 BuildRoot: %{_tmppath}/%{name}-%{version}-root
 Prereq: /sbin/chkconfig
-BuildRequires: libcli >= 1.8.5, openssl-devel
+BuildRequires: libcli >= 1.8.5
-Requires: libcli >= 1.8.5, openssl
+Requires: libcli >= 1.8.5
 
 %description
 l2tpns is a layer 2 tunneling protocol network server (LNS).  It
@@ -43,5 +43,5 @@ rm -rf %{buildroot}
 %attr(644,root,root) /usr/share/man/man[58]/*
 
 %changelog
-* Tue Aug 2 2005 Brendan O'Dea <bod@optus.net> 2.1.2-1
+* Wed Aug 10 2005 Brendan O'Dea <bod@optus.net> 2.1.2-1
 - 2.1.2 release, see /usr/share/doc/l2tpns-2.1.2/Changes

md5.c

@@ -0,0 +1,274 @@
+/*
+ * This is an OpenSSL-compatible implementation of the RSA Data Security,
+ * Inc. MD5 Message-Digest Algorithm.
+ *
+ * Written by Solar Designer <solar at openwall.com> in 2001, and placed
+ * in the public domain.  There's absolutely no warranty.
+ *
+ * This differs from Colin Plumb's older public domain implementation in
+ * that no 32-bit integer data type is required, there's no compile-time
+ * endianness configuration, and the function prototypes match OpenSSL's.
+ * The primary goals are portability and ease of use.
+ *
+ * This implementation is meant to be fast, but not as fast as possible.
+ * Some known optimizations are not included to reduce source code size
+ * and avoid compile-time configuration.
+ */
+
+#ifndef HAVE_OPENSSL
+
+#include <string.h>
+
+#include "md5.h"
+
+/*
+ * The basic MD5 functions.
+ *
+ * F is optimized compared to its RFC 1321 definition just like in Colin
+ * Plumb's implementation.
+ */
+#define F(x, y, z)			((z) ^ ((x) & ((y) ^ (z))))
+#define G(x, y, z)			((y) ^ ((z) & ((x) ^ (y))))
+#define H(x, y, z)			((x) ^ (y) ^ (z))
+#define I(x, y, z)			((y) ^ ((x) | ~(z)))
+
+/*
+ * The MD5 transformation for all four rounds.
+ */
+#define STEP(f, a, b, c, d, x, t, s) \
+	(a) += f((b), (c), (d)) + (x) + (t); \
+	(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
+	(a) += (b);
+
+/*
+ * SET reads 4 input bytes in little-endian byte order and stores them
+ * in a properly aligned word in host byte order.
+ *
+ * The check for little-endian architectures which tolerate unaligned
+ * memory accesses is just an optimization.  Nothing will break if it
+ * doesn't work.
+ */
+#if defined(__i386__) || defined(__vax__)
+#define SET(n) \
+	(*(MD5_u32plus *)&ptr[(n) * 4])
+#define GET(n) \
+	SET(n)
+#else
+#define SET(n) \
+	(ctx->block[(n)] = \
+	(MD5_u32plus)ptr[(n) * 4] | \
+	((MD5_u32plus)ptr[(n) * 4 + 1] << 8) | \
+	((MD5_u32plus)ptr[(n) * 4 + 2] << 16) | \
+	((MD5_u32plus)ptr[(n) * 4 + 3] << 24))
+#define GET(n) \
+	(ctx->block[(n)])
+#endif
+
+/*
+ * This processes one or more 64-byte data blocks, but does NOT update
+ * the bit counters.  There're no alignment requirements.
+ */
+static void *body(MD5_CTX *ctx, void *data, unsigned long size)
+{
+	unsigned char *ptr;
+	MD5_u32plus a, b, c, d;
+	MD5_u32plus saved_a, saved_b, saved_c, saved_d;
+
+	ptr = data;
+
+	a = ctx->a;
+	b = ctx->b;
+	c = ctx->c;
+	d = ctx->d;
+
+	do {
+		saved_a = a;
+		saved_b = b;
+		saved_c = c;
+		saved_d = d;
+
+/* Round 1 */
+		STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
+		STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
+		STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
+		STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
+		STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
+		STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
+		STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
+		STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
+		STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
+		STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
+		STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
+		STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
+		STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
+		STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
+		STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
+		STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
+
+/* Round 2 */
+		STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
+		STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
+		STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
+		STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
+		STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
+		STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
+		STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
+		STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
+		STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
+		STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
+		STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
+		STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
+		STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
+		STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
+		STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
+		STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
+
+/* Round 3 */
+		STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
+		STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
+		STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
+		STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
+		STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
+		STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
+		STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
+		STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
+		STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
+		STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
+		STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
+		STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
+		STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
+		STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
+		STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
+		STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)
+
+/* Round 4 */
+		STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
+		STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
+		STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
+		STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
+		STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
+		STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
+		STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
+		STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
+		STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
+		STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
+		STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
+		STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
+		STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
+		STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
+		STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
+		STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
+
+		a += saved_a;
+		b += saved_b;
+		c += saved_c;
+		d += saved_d;
+
+		ptr += 64;
+	} while (size -= 64);
+
+	ctx->a = a;
+	ctx->b = b;
+	ctx->c = c;
+	ctx->d = d;
+
+	return ptr;
+}
+
+void MD5_Init(MD5_CTX *ctx)
+{
+	ctx->a = 0x67452301;
+	ctx->b = 0xefcdab89;
+	ctx->c = 0x98badcfe;
+	ctx->d = 0x10325476;
+
+	ctx->lo = 0;
+	ctx->hi = 0;
+}
+
+void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size)
+{
+	MD5_u32plus saved_lo;
+	unsigned long used, free;
+
+	saved_lo = ctx->lo;
+	if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo)
+		ctx->hi++;
+	ctx->hi += size >> 29;
+
+	used = saved_lo & 0x3f;
+
+	if (used) {
+		free = 64 - used;
+
+		if (size < free) {
+			memcpy(&ctx->buffer[used], data, size);
+			return;
+		}
+
+		memcpy(&ctx->buffer[used], data, free);
+		data = (unsigned char *)data + free;
+		size -= free;
+		body(ctx, ctx->buffer, 64);
+	}
+
+	if (size >= 64) {
+		data = body(ctx, data, size & ~(unsigned long)0x3f);
+		size &= 0x3f;
+	}
+
+	memcpy(ctx->buffer, data, size);
+}
+
+void MD5_Final(unsigned char *result, MD5_CTX *ctx)
+{
+	unsigned long used, free;
+
+	used = ctx->lo & 0x3f;
+
+	ctx->buffer[used++] = 0x80;
+
+	free = 64 - used;
+
+	if (free < 8) {
+		memset(&ctx->buffer[used], 0, free);
+		body(ctx, ctx->buffer, 64);
+		used = 0;
+		free = 64;
+	}
+
+	memset(&ctx->buffer[used], 0, free - 8);
+
+	ctx->lo <<= 3;
+	ctx->buffer[56] = ctx->lo;
+	ctx->buffer[57] = ctx->lo >> 8;
+	ctx->buffer[58] = ctx->lo >> 16;
+	ctx->buffer[59] = ctx->lo >> 24;
+	ctx->buffer[60] = ctx->hi;
+	ctx->buffer[61] = ctx->hi >> 8;
+	ctx->buffer[62] = ctx->hi >> 16;
+	ctx->buffer[63] = ctx->hi >> 24;
+
+	body(ctx, ctx->buffer, 64);
+
+	result[0] = ctx->a;
+	result[1] = ctx->a >> 8;
+	result[2] = ctx->a >> 16;
+	result[3] = ctx->a >> 24;
+	result[4] = ctx->b;
+	result[5] = ctx->b >> 8;
+	result[6] = ctx->b >> 16;
+	result[7] = ctx->b >> 24;
+	result[8] = ctx->c;
+	result[9] = ctx->c >> 8;
+	result[10] = ctx->c >> 16;
+	result[11] = ctx->c >> 24;
+	result[12] = ctx->d;
+	result[13] = ctx->d >> 8;
+	result[14] = ctx->d >> 16;
+	result[15] = ctx->d >> 24;
+
+	memset(ctx, 0, sizeof(*ctx));
+}
+
+#endif

md5.h

@@ -0,0 +1,28 @@
+/*
+ * This is an OpenSSL-compatible implementation of the RSA Data Security,
+ * Inc. MD5 Message-Digest Algorithm.
+ *
+ * Written by Solar Designer <solar at openwall.com> in 2001, and placed
+ * in the public domain.  See md5.c for more information.
+ */
+
+#ifdef HAVE_OPENSSL
+#include <openssl/md5.h>
+#elif !defined(_MD5_H)
+#define _MD5_H
+
+/* Any 32-bit or wider unsigned integer data type will do */
+typedef unsigned long MD5_u32plus;
+
+typedef struct {
+	MD5_u32plus lo, hi;
+	MD5_u32plus a, b, c, d;
+	unsigned char buffer[64];
+	MD5_u32plus block[16];
+} MD5_CTX;
+
+extern void MD5_Init(MD5_CTX *ctx);
+extern void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size);
+extern void MD5_Final(unsigned char *result, MD5_CTX *ctx);
+
+#endif

test/radius.c

@@ -19,7 +19,7 @@
 #include <fcntl.h>
 #include <sys/select.h>
 #include <signal.h>
-#include <openssl/md5.h>
+#include "../md5.h"
 
 extern char *optarg;
 extern int optind;