1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
14 /* $ModDesc: Allows for MD5 encrypted oper passwords */
15 /* $ModDep: m_hash.h */
26 /* The four core functions - F1 is optimized somewhat */
27 #define F1(x, y, z) (z ^ (x & (y ^ z)))
28 #define F2(x, y, z) F1(z, x, y)
29 #define F3(x, y, z) (x ^ y ^ z)
30 #define F4(x, y, z) (y ^ (x | ~z))
32 /* This is the central step in the MD5 algorithm. */
33 #define MD5STEP(f,w,x,y,z,in,s) \
34 (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
37 typedef unsigned int uint32_t;
40 typedef uint32_t word32; /* NOT unsigned long. We don't support 16 bit platforms, anyway. */
41 typedef unsigned char byte;
43 /** An MD5 context, used by m_opermd5
45 class MD5Context : public classbase
53 class ModuleMD5 : public Module
55 void byteSwap(word32 *buf, unsigned words)
57 byte *p = (byte *)buf;
61 *buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
62 ((unsigned)p[1] << 8 | p[0]);
67 void MD5Init(MD5Context *ctx, unsigned int* key = NULL)
69 /* These are the defaults for md5 */
72 ctx->buf[0] = 0x67452301;
73 ctx->buf[1] = 0xefcdab89;
74 ctx->buf[2] = 0x98badcfe;
75 ctx->buf[3] = 0x10325476;
89 void MD5Update(MD5Context *ctx, byte const *buf, int len)
93 /* Update byte count */
96 if ((ctx->bytes[0] = t + len) < t)
97 ctx->bytes[1]++; /* Carry from low to high */
99 t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
100 if ((unsigned)t > (unsigned)len)
102 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
105 /* First chunk is an odd size */
106 memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
107 byteSwap(ctx->in, 16);
108 MD5Transform(ctx->buf, ctx->in);
112 /* Process data in 64-byte chunks */
115 memcpy(ctx->in, buf, 64);
116 byteSwap(ctx->in, 16);
117 MD5Transform(ctx->buf, ctx->in);
122 /* Handle any remaining bytes of data. */
123 memcpy(ctx->in, buf, len);
126 void MD5Final(byte digest[16], MD5Context *ctx)
128 int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
129 byte *p = (byte *)ctx->in + count; /* First unused byte */
131 /* Set the first char of padding to 0x80. There is always room. */
134 /* Bytes of padding needed to make 56 bytes (-8..55) */
135 count = 56 - 1 - count;
138 { /* Padding forces an extra block */
139 memset(p, 0, count+8);
140 byteSwap(ctx->in, 16);
141 MD5Transform(ctx->buf, ctx->in);
145 memset(p, 0, count+8);
146 byteSwap(ctx->in, 14);
148 /* Append length in bits and transform */
149 ctx->in[14] = ctx->bytes[0] << 3;
150 ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
151 MD5Transform(ctx->buf, ctx->in);
153 byteSwap(ctx->buf, 4);
154 memcpy(digest, ctx->buf, 16);
155 memset(ctx, 0, sizeof(ctx));
158 void MD5Transform(word32 buf[4], word32 const in[16])
160 register word32 a, b, c, d;
167 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
168 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
169 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
170 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
171 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
172 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
173 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
174 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
175 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
176 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
177 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
178 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
179 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
180 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
181 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
182 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
184 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
185 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
186 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
187 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
188 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
189 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
190 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
191 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
192 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
193 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
194 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
195 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
196 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
197 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
198 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
199 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
201 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
202 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
203 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
204 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
205 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
206 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
207 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
208 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
209 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
210 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
211 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
212 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
213 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
214 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
215 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
216 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
218 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
219 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
220 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
221 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
222 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
223 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
224 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
225 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
226 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
227 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
228 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
229 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
230 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
231 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
232 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
233 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
242 void MyMD5(void *dest, void *orig, int len, unsigned int* key)
245 MD5Init(&context, key);
246 MD5Update(&context, (const unsigned char*)orig, len);
247 MD5Final((unsigned char*)dest, &context);
251 void GenHash(const char* src, char* dest, const char* xtab, unsigned int* key)
253 unsigned char bytes[16];
255 MyMD5((char*)bytes, (void*)src, strlen(src), key);
257 for (int i = 0; i < 16; i++)
259 *dest++ = xtab[bytes[i] / 16];
260 *dest++ = xtab[bytes[i] % 16];
270 ModuleMD5(InspIRCd* Me)
271 : Module(Me), key(NULL), chars(NULL)
273 ServerInstance->PublishInterface("HashRequest", this);
278 ServerInstance->UnpublishInterface("HashRequest", this);
281 void Implements(char* List)
283 List[I_OnRequest] = 1;
286 virtual char* OnRequest(Request* request)
288 HashRequest* MD5 = (HashRequest*)request;
290 if (strcmp("KEY", request->GetId()) == 0)
292 this->key = (unsigned int*)MD5->GetKeyData();
294 else if (strcmp("HEX", request->GetId()) == 0)
296 this->chars = (char*)MD5->GetOutputs();
298 else if (strcmp("SUM", request->GetId()) == 0)
300 static char data[MAXBUF];
301 GenHash((const char*)MD5->GetHashData(), data, chars ? chars : "0123456789abcdef", key);
304 else if (strcmp("NAME", request->GetId()) == 0)
308 else if (strcmp("RESET", request->GetId()) == 0)
316 virtual Version GetVersion()
318 return Version(1,1,0,1,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
322 MODULE_INIT(ModuleMD5);