1 /* m_opersha256 - Written by Special <john@yarbbles.com>
3 * FIPS 180-2 SHA-224/256/384/512 implementation
4 * Last update: 05/23/2005
5 * Issue date: 04/30/2005
7 * Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 /* $ModDesc: Allows for SHA-256 encrypted oper passwords */
40 #include "inspircd_config.h"
47 #include "helperfuncs.h"
51 #define SHA256_DIGEST_SIZE (256 / 8)
52 #define SHA256_BLOCK_SIZE (512 / 8)
55 typedef unsigned int uint32_t;
58 class SHA256Context : public classbase
63 unsigned char block[2 * SHA256_BLOCK_SIZE];
67 void SHA256Init(struct SHA256Context *ctx);
68 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb);
69 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len);
70 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest);
71 void SHA256(const char *src, char *dest, int len);
73 #define SHFR(x, n) (x >> n)
74 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
75 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
76 #define CH(x, y, z) ((x & y) ^ (~x & z))
77 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
79 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
80 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
81 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
82 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
84 #define UNPACK32(x, str) \
86 *((str) + 3) = (uint8_t) ((x) ); \
87 *((str) + 2) = (uint8_t) ((x) >> 8); \
88 *((str) + 1) = (uint8_t) ((x) >> 16); \
89 *((str) + 0) = (uint8_t) ((x) >> 24); \
92 #define PACK32(str, x) \
94 *(x) = ((uint32_t) *((str) + 3) ) \
95 | ((uint32_t) *((str) + 2) << 8) \
96 | ((uint32_t) *((str) + 1) << 16) \
97 | ((uint32_t) *((str) + 0) << 24); \
100 /* Macros used for loops unrolling */
102 #define SHA256_SCR(i) \
104 w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
105 + SHA256_F3(w[i - 15]) + w[i - 16]; \
108 uint32_t sha256_h0[8] =
110 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
111 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
114 uint32_t sha256_k[64] =
116 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
117 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
118 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
119 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
120 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
121 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
122 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
123 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
124 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
125 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
126 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
127 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
128 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
129 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
130 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
131 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
134 void SHA256Init(struct SHA256Context *ctx)
136 for (int i = 0; i < 8; i++)
137 ctx->h[i] = sha256_h0[i];
142 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
146 unsigned char *sub_block;
147 for (unsigned int i = 1; i <= block_nb; i++)
150 sub_block = message + ((i - 1) << 6);
152 for (j = 0; j < 16; j++)
153 PACK32(&sub_block[j << 2], &w[j]);
154 for (j = 16; j < 64; j++)
156 for (j = 0; j < 8; j++)
158 for (j = 0; j < 64; j++)
160 uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
161 uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
171 for (j = 0; j < 8; j++)
176 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len)
178 unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
179 memcpy(&ctx->block[ctx->len], message, rem_len);
180 if (ctx->len + len < SHA256_BLOCK_SIZE)
185 unsigned int new_len = len - rem_len;
186 unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
187 unsigned char *shifted_message = message + rem_len;
188 SHA256Transform(ctx, ctx->block, 1);
189 SHA256Transform(ctx, shifted_message, block_nb);
190 rem_len = new_len % SHA256_BLOCK_SIZE;
191 memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
193 ctx->tot_len += (block_nb + 1) << 6;
196 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest)
198 unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
199 unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
200 unsigned int pm_len = block_nb << 6;
201 memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
202 ctx->block[ctx->len] = 0x80;
203 UNPACK32(len_b, ctx->block + pm_len - 4);
204 SHA256Transform(ctx, ctx->block, block_nb);
205 for (int i = 0 ; i < 8; i++)
206 UNPACK32(ctx->h[i], &digest[i << 2]);
209 void SHA256(const char *src, char *dest, int len)
212 unsigned char bytehash[SHA256_DIGEST_SIZE];
213 struct SHA256Context ctx;
215 SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
216 SHA256Final(&ctx, bytehash);
218 const char *hxc = "0123456789abcdef";
219 for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
221 dest[j++] = hxc[bytehash[i] / 16];
222 dest[j++] = hxc[bytehash[i] % 16];
227 class cmd_mksha256 : public command_t
230 cmd_mksha256() : command_t("MKSHA256", 'o', 1)
232 this->source = "m_opersha256.so";
233 syntax = "<any-text>";
236 void Handle(const char** parameters, int pcnt, userrec *user)
238 char buffer[SHA256_BLOCK_SIZE + 1];
239 SHA256(parameters[0], buffer, strlen(parameters[0]));
240 WriteServ(user->fd, "NOTICE %s :SHA256 hashed password for %s is %s", user->nick, parameters[0], buffer);
244 class ModuleOperSHA256 : public Module
246 cmd_mksha256 *mksha256cmd;
249 ModuleOperSHA256(Server *Me) : Module::Module(Me)
252 mksha256cmd = new cmd_mksha256();
253 Srv->AddCommand(mksha256cmd);
256 virtual ~ModuleOperSHA256()
260 void Implements(char *List)
262 List[I_OnOperCompare] = 1;
265 virtual int OnOperCompare(const std::string &data, const std::string &input)
267 if (data.length() == SHA256_BLOCK_SIZE) // If the data is as long as a hex sha256 hash, try it as that
269 char buffer[SHA256_BLOCK_SIZE + 1];
270 SHA256(input.c_str(), buffer, strlen(input.c_str()));
271 if (!strcasecmp(data.c_str(), buffer))
279 virtual Version GetVersion()
281 return Version(1, 0, 0, 1, 0);
286 class ModuleOperSHA256Factory : public ModuleFactory
289 ModuleOperSHA256Factory()
293 ~ModuleOperSHA256Factory()
297 virtual Module *CreateModule(Server* Me)
299 return new ModuleOperSHA256(Me);
304 extern "C" void * init_module( void )
306 return new ModuleOperSHA256Factory;