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/>.
25 #include "modules/hash.h"
27 /* The four core functions - F1 is optimized somewhat */
28 #define F1(x, y, z) (z ^ (x & (y ^ z)))
29 #define F2(x, y, z) F1(z, x, y)
30 #define F3(x, y, z) (x ^ y ^ z)
31 #define F4(x, y, z) (y ^ (x | ~z))
33 /* This is the central step in the MD5 algorithm. */
34 #define MD5STEP(f,w,x,y,z,in,s) \
35 (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
37 typedef uint32_t word32; /* NOT unsigned long. We don't support 16 bit platforms, anyway. */
38 typedef unsigned char byte;
40 /** An MD5 context, used by m_opermd5
50 class MD5Provider : public HashProvider
52 void byteSwap(word32 *buf, unsigned words)
54 byte *p = (byte *)buf;
58 *buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
59 ((unsigned)p[1] << 8 | p[0]);
64 void MD5Init(MD5Context *ctx)
66 /* These are the defaults for md5 */
67 ctx->buf[0] = 0x67452301;
68 ctx->buf[1] = 0xefcdab89;
69 ctx->buf[2] = 0x98badcfe;
70 ctx->buf[3] = 0x10325476;
76 void MD5Update(MD5Context *ctx, byte const *buf, int len)
80 /* Update byte count */
83 if ((ctx->bytes[0] = t + len) < t)
84 ctx->bytes[1]++; /* Carry from low to high */
86 t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
87 if ((unsigned)t > (unsigned)len)
89 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
92 /* First chunk is an odd size */
93 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
94 byteSwap(ctx->in, 16);
95 MD5Transform(ctx->buf, ctx->in);
99 /* Process data in 64-byte chunks */
102 memcpy(ctx->in, buf, 64);
103 byteSwap(ctx->in, 16);
104 MD5Transform(ctx->buf, ctx->in);
109 /* Handle any remaining bytes of data. */
110 memcpy(ctx->in, buf, len);
113 void MD5Final(byte digest[16], MD5Context *ctx)
115 int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
116 byte *p = (byte *)ctx->in + count; /* First unused byte */
118 /* Set the first char of padding to 0x80. There is always room. */
121 /* Bytes of padding needed to make 56 bytes (-8..55) */
122 count = 56 - 1 - count;
125 { /* Padding forces an extra block */
126 memset(p, 0, count+8);
127 byteSwap(ctx->in, 16);
128 MD5Transform(ctx->buf, ctx->in);
132 memset(p, 0, count+8);
133 byteSwap(ctx->in, 14);
135 /* Append length in bits and transform */
136 ctx->in[14] = ctx->bytes[0] << 3;
137 ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
138 MD5Transform(ctx->buf, ctx->in);
140 byteSwap(ctx->buf, 4);
141 memcpy(digest, ctx->buf, 16);
142 memset(ctx, 0, sizeof(*ctx));
145 void MD5Transform(word32 buf[4], word32 const in[16])
154 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
155 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
156 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
157 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
158 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
159 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
160 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
161 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
162 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
163 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
164 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
165 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
166 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
167 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
168 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
169 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
171 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
172 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
173 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
174 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
175 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
176 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
177 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
178 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
179 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
180 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
181 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
182 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
183 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
184 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
185 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
186 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
188 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
189 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
190 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
191 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
192 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
193 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
194 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
195 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
196 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
197 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
198 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
199 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
200 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
201 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
202 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
203 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
205 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
206 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
207 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
208 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
209 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
210 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
211 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
212 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
213 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
214 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
215 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
216 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
217 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
218 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
219 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
220 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
229 void MyMD5(void *dest, void *orig, int len)
233 MD5Update(&context, (const unsigned char*)orig, len);
234 MD5Final((unsigned char*)dest, &context);
238 std::string GenerateRaw(const std::string& data)
241 MyMD5(res, (void*)data.data(), data.length());
242 return std::string(res, 16);
245 MD5Provider(Module* parent) : HashProvider(parent, "md5", 16, 64) {}
248 class ModuleMD5 : public Module
252 ModuleMD5() : md5(this)
256 Version GetVersion() CXX11_OVERRIDE
258 return Version("Implements MD5 hashing",VF_VENDOR);
262 MODULE_INIT(ModuleMD5)