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| -rw-r--r-- | src/modules/m_opermd5.cpp | 327 |
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; +} |