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 /* m_sha256 - Based on m_opersha256 written by Special <john@yarbbles.com>
15 * Modified and improved by Craig Edwards, December 2006.
18 * FIPS 180-2 SHA-224/256/384/512 implementation
19 * Last update: 05/23/2005
20 * Issue date: 04/30/2005
22 * Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
23 * All rights reserved.
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. Neither the name of the project nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 /* $ModDesc: Allows for SHA-256 encrypted oper passwords */
51 /* $ModDep: m_hash.h */
63 typedef unsigned int uint32_t;
66 /** An sha 256 context, used by m_opersha256
68 class SHA256Context : public classbase
73 unsigned char block[2 * SHA256_BLOCK_SIZE];
77 #define SHFR(x, n) (x >> n)
78 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
79 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
80 #define CH(x, y, z) ((x & y) ^ (~x & z))
81 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
83 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
84 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
85 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
86 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
88 #define UNPACK32(x, str) \
90 *((str) + 3) = (uint8_t) ((x) ); \
91 *((str) + 2) = (uint8_t) ((x) >> 8); \
92 *((str) + 1) = (uint8_t) ((x) >> 16); \
93 *((str) + 0) = (uint8_t) ((x) >> 24); \
96 #define PACK32(str, x) \
98 *(x) = ((uint32_t) *((str) + 3) ) \
99 | ((uint32_t) *((str) + 2) << 8) \
100 | ((uint32_t) *((str) + 1) << 16) \
101 | ((uint32_t) *((str) + 0) << 24); \
104 /* Macros used for loops unrolling */
106 #define SHA256_SCR(i) \
108 w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
109 + SHA256_F3(w[i - 15]) + w[i - 16]; \
112 const unsigned int sha256_h0[8] =
114 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
115 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
118 uint32_t sha256_k[64] =
120 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
121 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
122 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
123 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
124 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
125 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
126 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
127 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
128 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
129 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
130 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
131 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
132 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
133 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
134 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
135 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
138 class ModuleSHA256 : public Module
140 void SHA256Init(SHA256Context *ctx, const unsigned int* key)
144 for (int i = 0; i < 8; i++)
149 for (int i = 0; i < 8; i++)
150 ctx->h[i] = sha256_h0[i];
156 void SHA256Transform(SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
160 unsigned char *sub_block;
161 for (unsigned int i = 1; i <= block_nb; i++)
164 sub_block = message + ((i - 1) << 6);
166 for (j = 0; j < 16; j++)
167 PACK32(&sub_block[j << 2], &w[j]);
168 for (j = 16; j < 64; j++)
170 for (j = 0; j < 8; j++)
172 for (j = 0; j < 64; j++)
174 uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
175 uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
185 for (j = 0; j < 8; j++)
190 void SHA256Update(SHA256Context *ctx, unsigned char *message, unsigned int len)
192 unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
193 memcpy(&ctx->block[ctx->len], message, rem_len);
194 if (ctx->len + len < SHA256_BLOCK_SIZE)
199 unsigned int new_len = len - rem_len;
200 unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
201 unsigned char *shifted_message = message + rem_len;
202 SHA256Transform(ctx, ctx->block, 1);
203 SHA256Transform(ctx, shifted_message, block_nb);
204 rem_len = new_len % SHA256_BLOCK_SIZE;
205 memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
207 ctx->tot_len += (block_nb + 1) << 6;
210 void SHA256Final(SHA256Context *ctx, unsigned char *digest)
212 unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
213 unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
214 unsigned int pm_len = block_nb << 6;
215 memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
216 ctx->block[ctx->len] = 0x80;
217 UNPACK32(len_b, ctx->block + pm_len - 4);
218 SHA256Transform(ctx, ctx->block, block_nb);
219 for (int i = 0 ; i < 8; i++)
220 UNPACK32(ctx->h[i], &digest[i << 2]);
223 void SHA256(const char *src, char *dest, int len, const char* hxc, const unsigned int* key = NULL)
226 unsigned char bytehash[SHA256_DIGEST_SIZE];
228 SHA256Init(&ctx, key);
229 SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
230 SHA256Final(&ctx, bytehash);
232 for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
234 dest[j++] = hxc[bytehash[i] / 16];
235 dest[j++] = hxc[bytehash[i] % 16];
245 ModuleSHA256(InspIRCd* Me) : Module(Me), key(NULL), chars(NULL)
247 ServerInstance->PublishInterface("HashRequest", this);
250 virtual ~ModuleSHA256()
252 ServerInstance->UnpublishInterface("HashRequest", this);
255 void Implements(char *List)
257 List[I_OnRequest] = 1;
260 virtual char* OnRequest(Request* request)
262 HashRequest* SHA = (HashRequest*)request;
263 if (strcmp("KEY", request->GetId()) == 0)
265 this->key = (unsigned int*)SHA->GetKeyData();
267 else if (strcmp("HEX", request->GetId()) == 0)
269 this->chars = (char*)SHA->GetOutputs();
271 else if (strcmp("SUM", request->GetId()) == 0)
273 static char data[MAXBUF];
274 SHA256((const char*)SHA->GetHashData(), data, strlen(SHA->GetHashData()), chars ? chars : "0123456789abcdef", key);
277 else if (strcmp("NAME", request->GetId()) == 0)
281 else if (strcmp("RESET", request->GetId()) == 0)
289 virtual Version GetVersion()
291 return Version(1, 1, 0, 1, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
295 MODULE_INIT(ModuleSHA256)