1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
17 /* $ModDesc: Allows for MD5 encrypted oper passwords */
18 /* $ModDep: m_hash.h */
22 #include "inspircd_config.h"
33 /* The four core functions - F1 is optimized somewhat */
34 #define F1(x, y, z) (z ^ (x & (y ^ z)))
35 #define F2(x, y, z) F1(z, x, y)
36 #define F3(x, y, z) (x ^ y ^ z)
37 #define F4(x, y, z) (y ^ (x | ~z))
39 /* This is the central step in the MD5 algorithm. */
40 #define MD5STEP(f,w,x,y,z,in,s) \
41 (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
44 typedef unsigned int uint32_t;
47 typedef uint32_t word32; /* NOT unsigned long. We don't support 16 bit platforms, anyway. */
48 typedef unsigned char byte;
50 /** An MD5 context, used by m_opermd5
52 class MD5Context : public classbase
60 class ModuleMD5 : public Module
62 void byteSwap(word32 *buf, unsigned words)
64 byte *p = (byte *)buf;
68 *buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
69 ((unsigned)p[1] << 8 | p[0]);
74 /* XXX - maybe if we had an md5/encryption moduletype? *shrug* */
75 void MD5Init(struct MD5Context *ctx, unsigned int* key = NULL)
77 /* These are the defaults for md5 */
80 ctx->buf[0] = 0x67452301;
81 ctx->buf[1] = 0xefcdab89;
82 ctx->buf[2] = 0x98badcfe;
83 ctx->buf[3] = 0x10325476;
97 void MD5Update(struct MD5Context *ctx, byte const *buf, int len)
101 /* Update byte count */
104 if ((ctx->bytes[0] = t + len) < t)
105 ctx->bytes[1]++; /* Carry from low to high */
107 t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
108 if ((unsigned)t > (unsigned)len)
110 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
113 /* First chunk is an odd size */
114 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
115 byteSwap(ctx->in, 16);
116 MD5Transform(ctx->buf, ctx->in);
120 /* Process data in 64-byte chunks */
123 memcpy(ctx->in, buf, 64);
124 byteSwap(ctx->in, 16);
125 MD5Transform(ctx->buf, ctx->in);
130 /* Handle any remaining bytes of data. */
131 memcpy(ctx->in, buf, len);
134 void MD5Final(byte digest[16], struct MD5Context *ctx)
136 int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
137 byte *p = (byte *)ctx->in + count; /* First unused byte */
139 /* Set the first char of padding to 0x80. There is always room. */
142 /* Bytes of padding needed to make 56 bytes (-8..55) */
143 count = 56 - 1 - count;
146 { /* Padding forces an extra block */
147 memset(p, 0, count+8);
148 byteSwap(ctx->in, 16);
149 MD5Transform(ctx->buf, ctx->in);
153 memset(p, 0, count+8);
154 byteSwap(ctx->in, 14);
156 /* Append length in bits and transform */
157 ctx->in[14] = ctx->bytes[0] << 3;
158 ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
159 MD5Transform(ctx->buf, ctx->in);
161 byteSwap(ctx->buf, 4);
162 memcpy(digest, ctx->buf, 16);
163 memset(ctx, 0, sizeof(ctx));
166 void MD5Transform(word32 buf[4], word32 const in[16])
168 register word32 a, b, c, d;
175 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
176 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
177 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
178 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
179 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
180 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
181 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
182 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
183 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
184 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
185 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
186 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
187 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
188 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
189 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
190 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
192 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
193 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
194 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
195 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
196 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
197 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
198 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
199 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
200 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
201 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
202 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
203 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
204 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
205 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
206 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
207 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
209 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
210 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
211 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
212 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
213 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
214 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
215 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
216 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
217 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
218 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
219 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
220 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
221 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
222 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
223 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
224 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
226 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
227 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
228 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
229 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
230 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
231 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
232 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
233 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
234 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
235 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
236 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
237 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
238 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
239 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
240 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
241 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
250 void MyMD5(void *dest, void *orig, int len, unsigned int* key)
253 MD5Init(&context, key);
254 MD5Update(&context, (const unsigned char*)orig, len);
255 MD5Final((unsigned char*)dest, &context);
259 void GenHash(const char* src, char* dest, const char* xtab, unsigned int* key)
261 unsigned char bytes[16];
263 MyMD5((char*)bytes, (void*)src, strlen(src), key);
265 for (int i = 0; i < 16; i++)
267 *dest++ = xtab[bytes[i] / 16];
268 *dest++ = xtab[bytes[i] % 16];
278 ModuleMD5(InspIRCd* Me)
279 : Module::Module(Me), key(NULL), chars(NULL)
281 ServerInstance->PublishInterface("HashRequest", this);
286 ServerInstance->UnpublishInterface("HashRequest", this);
289 void Implements(char* List)
291 List[I_OnRequest] = 1;
294 virtual char* OnRequest(Request* request)
296 HashRequest* MD5 = (HashRequest*)request;
298 if (strcmp("KEY", request->GetId()) == 0)
300 this->key = (unsigned int*)MD5->GetKeyData();
302 else if (strcmp("HEX", request->GetId()) == 0)
304 this->chars = (char*)MD5->GetOutputs();
306 else if (strcmp("SUM", request->GetId()) == 0)
308 static char data[MAXBUF];
309 GenHash((const char*)MD5->GetHashData(), data, chars ? chars : "0123456789abcdef", key);
312 else if (strcmp("NAME", request->GetId()) == 0)
316 else if (strcmp("RESET", request->GetId()) == 0)
324 virtual Version GetVersion()
326 return Version(1,1,0,1,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
331 class ModuleMD5Factory : public ModuleFactory
342 virtual Module * CreateModule(InspIRCd* Me)
344 return new ModuleMD5(Me);
350 extern "C" void * init_module( void )
352 return new ModuleMD5Factory;