2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
6 * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
8 * Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
10 * This file is part of InspIRCd. InspIRCd is free software: you can
11 * redistribute it and/or modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation, version 2.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /* $ModDesc: Allows for MD5 encrypted oper passwords */
32 /* The four core functions - F1 is optimized somewhat */
33 #define F1(x, y, z) (z ^ (x & (y ^ z)))
34 #define F2(x, y, z) F1(z, x, y)
35 #define F3(x, y, z) (x ^ y ^ z)
36 #define F4(x, y, z) (y ^ (x | ~z))
38 /* This is the central step in the MD5 algorithm. */
39 #define MD5STEP(f,w,x,y,z,in,s) \
40 (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
43 typedef unsigned int uint32_t;
46 typedef uint32_t word32; /* NOT unsigned long. We don't support 16 bit platforms, anyway. */
47 typedef unsigned char byte;
49 /** An MD5 context, used by m_opermd5
59 class MD5Provider : public HashProvider
61 void byteSwap(word32 *buf, unsigned words)
63 byte *p = (byte *)buf;
67 *buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
68 ((unsigned)p[1] << 8 | p[0]);
73 void MD5Init(MD5Context *ctx, unsigned int* ikey = NULL)
75 /* These are the defaults for md5 */
78 ctx->buf[0] = 0x67452301;
79 ctx->buf[1] = 0xefcdab89;
80 ctx->buf[2] = 0x98badcfe;
81 ctx->buf[3] = 0x10325476;
85 ctx->buf[0] = ikey[0];
86 ctx->buf[1] = ikey[1];
87 ctx->buf[2] = ikey[2];
88 ctx->buf[3] = ikey[3];
95 void MD5Update(MD5Context *ctx, byte const *buf, int len)
99 /* Update byte count */
102 if ((ctx->bytes[0] = t + len) < t)
103 ctx->bytes[1]++; /* Carry from low to high */
105 t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
106 if ((unsigned)t > (unsigned)len)
108 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
111 /* First chunk is an odd size */
112 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
113 byteSwap(ctx->in, 16);
114 MD5Transform(ctx->buf, ctx->in);
118 /* Process data in 64-byte chunks */
121 memcpy(ctx->in, buf, 64);
122 byteSwap(ctx->in, 16);
123 MD5Transform(ctx->buf, ctx->in);
128 /* Handle any remaining bytes of data. */
129 memcpy(ctx->in, buf, len);
132 void MD5Final(byte digest[16], MD5Context *ctx)
134 int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
135 byte *p = (byte *)ctx->in + count; /* First unused byte */
137 /* Set the first char of padding to 0x80. There is always room. */
140 /* Bytes of padding needed to make 56 bytes (-8..55) */
141 count = 56 - 1 - count;
144 { /* Padding forces an extra block */
145 memset(p, 0, count+8);
146 byteSwap(ctx->in, 16);
147 MD5Transform(ctx->buf, ctx->in);
151 memset(p, 0, count+8);
152 byteSwap(ctx->in, 14);
154 /* Append length in bits and transform */
155 ctx->in[14] = ctx->bytes[0] << 3;
156 ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
157 MD5Transform(ctx->buf, ctx->in);
159 byteSwap(ctx->buf, 4);
160 memcpy(digest, ctx->buf, 16);
161 memset(ctx, 0, sizeof(*ctx));
164 void MD5Transform(word32 buf[4], word32 const in[16])
166 register word32 a, b, c, d;
173 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
174 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
175 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
176 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
177 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
178 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
179 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
180 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
181 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
182 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
183 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
184 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
185 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
186 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
187 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
188 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
190 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
191 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
192 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
193 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
194 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
195 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
196 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
197 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
198 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
199 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
200 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
201 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
202 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
203 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
204 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
205 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
207 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
208 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
209 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
210 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
211 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
212 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
213 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
214 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
215 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
216 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
217 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
218 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
219 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
220 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
221 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
222 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
224 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
225 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
226 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
227 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
228 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
229 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
230 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
231 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
232 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
233 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
234 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
235 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
236 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
237 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
238 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
239 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
248 void MyMD5(void *dest, void *orig, int len, unsigned int* ikey)
251 MD5Init(&context, ikey);
252 MD5Update(&context, (const unsigned char*)orig, len);
253 MD5Final((unsigned char*)dest, &context);
257 void GenHash(const char* src, char* dest, const char* xtab, unsigned int* ikey, size_t srclen)
259 unsigned char bytes[16];
261 MyMD5((char*)bytes, (void*)src, srclen, ikey);
263 for (int i = 0; i < 16; i++)
265 *dest++ = xtab[bytes[i] / 16];
266 *dest++ = xtab[bytes[i] % 16];
271 std::string sum(const std::string& data)
274 MyMD5(res, (void*)data.data(), data.length(), NULL);
275 return std::string(res, 16);
278 std::string sumIV(unsigned int* IV, const char* HexMap, const std::string &sdata)
281 GenHash(sdata.data(), res, HexMap, IV, sdata.length());
285 MD5Provider(Module* parent) : HashProvider(parent, "hash/md5", 16, 64) {}
288 class ModuleMD5 : public Module
292 ModuleMD5() : md5(this)
294 ServerInstance->Modules->AddService(md5);
299 return Version("Implements MD5 hashing",VF_VENDOR);
303 MODULE_INIT(ModuleMD5)