Added module which provides MD5 encryption for oper passwords plus /mkpasswd

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@1162 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 327 insertions, 0 deletions

diff --git a/src/modules/m_opermd5.cpp b/src/modules/m_opermd5.cpp
new file mode 100644
index 000000000..661ed3ef5
--- /dev/null
+++ b/src/modules/m_opermd5.cpp
@@ -0,0 +1,327 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
+ *                       E-mail:
+ *                <brain@chatspike.net>
+ *           	  <Craig@chatspike.net>
+ *     
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+/* $ModDesc: Allows for MD5 encrypted oper passwords */
+
+#include <stdio.h>
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+
+
+/* The four core functions - F1 is optimized somewhat */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f,w,x,y,z,in,s) \
+         (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
+
+typedef unsigned long word32;
+typedef unsigned char byte;
+
+struct MD5Context {
+	word32 buf[4];
+	word32 bytes[2];
+	word32 in[16];
+};
+
+Server *Srv;
+
+void MD5Init(struct MD5Context *context);
+void MD5Update(struct MD5Context *context, byte const *buf, int len);
+void MD5Final(byte digest[16], struct MD5Context *context);
+void MD5Transform(word32 buf[4], word32 const in[16]);
+void MyMD5(void *dest, void *orig, int len);
+void GenHash(const char* src, char* dest);
+
+void byteSwap(word32 *buf, unsigned words)
+{
+	byte *p = (byte *)buf;
+
+	do {
+		*buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
+			((unsigned)p[1] << 8 | p[0]);
+		p += 4;
+	} while (--words);
+}
+
+void MD5Init(struct MD5Context *ctx)
+{
+	ctx->buf[0] = 0x67452301;
+	ctx->buf[1] = 0xefcdab89;
+	ctx->buf[2] = 0x98badcfe;
+	ctx->buf[3] = 0x10325476;
+
+	ctx->bytes[0] = 0;
+	ctx->bytes[1] = 0;
+}
+
+void MD5Update(struct MD5Context *ctx, byte const *buf, int len)
+{
+	word32 t;
+
+	/* Update byte count */
+
+	t = ctx->bytes[0];
+	if ((ctx->bytes[0] = t + len) < t)
+		ctx->bytes[1]++;	/* Carry from low to high */
+
+	t = 64 - (t & 0x3f);	/* Space available in ctx->in (at least 1) */
+	if ((unsigned)t > (unsigned)len) {
+		memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
+		return;
+	}
+	/* First chunk is an odd size */
+	memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
+	byteSwap(ctx->in, 16);
+	MD5Transform(ctx->buf, ctx->in);
+	buf += (unsigned)t;
+	len -= (unsigned)t;
+
+	/* Process data in 64-byte chunks */
+	while (len >= 64) {
+		memcpy(ctx->in, buf, 64);
+		byteSwap(ctx->in, 16);
+		MD5Transform(ctx->buf, ctx->in);
+		buf += 64;
+		len -= 64;
+	}
+
+	/* Handle any remaining bytes of data. */
+	memcpy(ctx->in, buf, len);
+}
+
+void MD5Final(byte digest[16], struct MD5Context *ctx)
+{
+	int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
+	byte *p = (byte *)ctx->in + count;	/* First unused byte */
+
+	/* Set the first char of padding to 0x80.  There is always room. */
+	*p++ = 0x80;
+
+	/* Bytes of padding needed to make 56 bytes (-8..55) */
+	count = 56 - 1 - count;
+
+	if (count < 0) {	/* Padding forces an extra block */
+		memset(p, 0, count+8);
+		byteSwap(ctx->in, 16);
+		MD5Transform(ctx->buf, ctx->in);
+		p = (byte *)ctx->in;
+		count = 56;
+	}
+	memset(p, 0, count+8);
+	byteSwap(ctx->in, 14);
+
+	/* Append length in bits and transform */
+	ctx->in[14] = ctx->bytes[0] << 3;
+	ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
+	MD5Transform(ctx->buf, ctx->in);
+
+	byteSwap(ctx->buf, 4);
+	memcpy(digest, ctx->buf, 16);
+	memset(ctx, 0, sizeof(ctx));
+}
+
+void MD5Transform(word32 buf[4], word32 const in[16])
+{
+	register word32 a, b, c, d;
+
+	a = buf[0];
+	b = buf[1];
+	c = buf[2];
+	d = buf[3];
+
+	MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+	MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+	MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+	MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+	MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+	MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+	MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+	MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+	MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+	MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+	MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+	MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+	MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+	MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+	MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+	MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+	MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+	MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+	MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+	MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+	MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+	MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+	MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+	MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+	MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+	MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+	MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+	MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+	MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+	MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+	MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+	MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+	MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+	MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+	MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+	MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+	MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+	MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+	MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+	MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+	MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+	MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+	MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+	MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+	MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+	MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+	MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+	MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+	MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+	MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+	MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+	MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+	MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+	MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+	MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+	MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+	MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+	MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+	MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+	MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+	MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+	MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+	MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+	MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+	buf[0] += a;
+	buf[1] += b;
+	buf[2] += c;
+	buf[3] += d;
+}
+
+
+void MyMD5(void *dest, void *orig, int len)
+{
+	struct MD5Context context;
+
+	MD5Init(&context);
+	MD5Update(&context, (const unsigned char*)orig, len);
+	MD5Final((unsigned char*)dest, &context);
+}
+
+
+void GenHash(const char* src, char* dest)
+{
+	int i = 0;
+	unsigned char bytes[16];
+	char hash[1024];
+	strcpy(hash,"");
+	MyMD5((char*)bytes,(void*)src,strlen(src));
+	for (i = 0; i < 16; i++)
+	{
+		const char* xtab = "0123456789abcdef";
+		unsigned char lo = xtab[bytes[i] % 16];
+		unsigned char hi = xtab[bytes[i] / 16];
+		char hx[3];
+		hx[0] = hi;
+		hx[1] = lo;
+		hx[2] = '\0';
+		strcat(hash,hx);
+	}
+	strcpy(dest,hash);
+}
+
+void handle_mkpasswd(char **parameters, int pcnt, userrec *user)
+{
+	char buffer[MAXBUF];
+	GenHash(parameters[0],buffer);
+	WriteServ(user->fd,"NOTICE %s :MD5 hashed password for %s is %s",user->nick,parameters[0],buffer);
+}
+
+class ModuleOperMD5 : public Module
+{
+ public:
+
+	ModuleOperMD5()
+	{
+		Srv = new Server;
+		Srv->AddCommand("MKPASSWD",handle_mkpasswd,'o',1,"m_opermd5.so");
+	}
+	
+	virtual ~ModuleOperMD5()
+	{
+		delete Srv;
+	}
+
+	virtual int OnOperCompare(std::string data, std::string input)
+	{
+		char buffer[MAXBUF];
+		if (data.length() == 32)	// if its 32 chars long, try it as an md5
+		{
+			GenHash(input.c_str(),buffer);
+			if (!strcasecmp(data.c_str(),buffer))
+			{
+				return 1;
+			}
+			else return -1;
+		}
+		return 0;
+	}
+	
+	virtual Version GetVersion()
+	{
+		return Version(1,0,0,1,VF_VENDOR);
+	}
+	
+	virtual void OnUserConnect(userrec* user)
+	{
+	}
+
+};
+
+
+class ModuleOperMD5Factory : public ModuleFactory
+{
+ public:
+	ModuleOperMD5Factory()
+	{
+	}
+	
+	~ModuleOperMD5Factory()
+	{
+	}
+	
+	virtual Module * CreateModule()
+	{
+		return new ModuleOperMD5;
+	}
+	
+};
+
+
+extern "C" void * init_module( void )
+{
+	return new ModuleOperMD5Factory;
+}