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"
52 #define SHA256_DIGEST_SIZE (256 / 8)
53 #define SHA256_BLOCK_SIZE (512 / 8)
56 typedef unsigned int uint32_t;
59 /** An sha 256 context, used by m_opersha256
61 class SHA256Context : public classbase
66 unsigned char block[2 * SHA256_BLOCK_SIZE];
70 void SHA256Init(struct SHA256Context *ctx);
71 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb);
72 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len);
73 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest);
74 void SHA256(const char *src, char *dest, int len);
76 #define SHFR(x, n) (x >> n)
77 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
78 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
79 #define CH(x, y, z) ((x & y) ^ (~x & z))
80 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
82 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
83 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
84 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
85 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
87 #define UNPACK32(x, str) \
89 *((str) + 3) = (uint8_t) ((x) ); \
90 *((str) + 2) = (uint8_t) ((x) >> 8); \
91 *((str) + 1) = (uint8_t) ((x) >> 16); \
92 *((str) + 0) = (uint8_t) ((x) >> 24); \
95 #define PACK32(str, x) \
97 *(x) = ((uint32_t) *((str) + 3) ) \
98 | ((uint32_t) *((str) + 2) << 8) \
99 | ((uint32_t) *((str) + 1) << 16) \
100 | ((uint32_t) *((str) + 0) << 24); \
103 /* Macros used for loops unrolling */
105 #define SHA256_SCR(i) \
107 w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
108 + SHA256_F3(w[i - 15]) + w[i - 16]; \
111 uint32_t sha256_h0[8] =
113 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
114 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
117 uint32_t sha256_k[64] =
119 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
120 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
121 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
122 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
123 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
124 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
125 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
126 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
127 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
128 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
129 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
130 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
131 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
132 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
133 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
134 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
137 void SHA256Init(struct SHA256Context *ctx)
139 for (int i = 0; i < 8; i++)
140 ctx->h[i] = sha256_h0[i];
145 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
149 unsigned char *sub_block;
150 for (unsigned int i = 1; i <= block_nb; i++)
153 sub_block = message + ((i - 1) << 6);
155 for (j = 0; j < 16; j++)
156 PACK32(&sub_block[j << 2], &w[j]);
157 for (j = 16; j < 64; j++)
159 for (j = 0; j < 8; j++)
161 for (j = 0; j < 64; j++)
163 uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
164 uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
174 for (j = 0; j < 8; j++)
179 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len)
181 unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
182 memcpy(&ctx->block[ctx->len], message, rem_len);
183 if (ctx->len + len < SHA256_BLOCK_SIZE)
188 unsigned int new_len = len - rem_len;
189 unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
190 unsigned char *shifted_message = message + rem_len;
191 SHA256Transform(ctx, ctx->block, 1);
192 SHA256Transform(ctx, shifted_message, block_nb);
193 rem_len = new_len % SHA256_BLOCK_SIZE;
194 memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
196 ctx->tot_len += (block_nb + 1) << 6;
199 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest)
201 unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
202 unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
203 unsigned int pm_len = block_nb << 6;
204 memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
205 ctx->block[ctx->len] = 0x80;
206 UNPACK32(len_b, ctx->block + pm_len - 4);
207 SHA256Transform(ctx, ctx->block, block_nb);
208 for (int i = 0 ; i < 8; i++)
209 UNPACK32(ctx->h[i], &digest[i << 2]);
212 void SHA256(const char *src, char *dest, int len)
215 unsigned char bytehash[SHA256_DIGEST_SIZE];
216 struct SHA256Context ctx;
218 SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
219 SHA256Final(&ctx, bytehash);
221 const char *hxc = "0123456789abcdef";
222 for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
224 dest[j++] = hxc[bytehash[i] / 16];
225 dest[j++] = hxc[bytehash[i] % 16];
232 class cmd_mksha256 : public command_t
235 cmd_mksha256 (InspIRCd* Instance) : command_t(Instance,"MKSHA256", 'o', 1)
237 this->source = "m_opersha256.so";
238 syntax = "<any-text>";
241 CmdResult Handle(const char** parameters, int pcnt, userrec *user)
243 char buffer[SHA256_BLOCK_SIZE + 1];
244 SHA256(parameters[0], buffer, strlen(parameters[0]));
245 user->WriteServ("NOTICE %s :SHA256 hashed password for %s is %s", user->nick, parameters[0], buffer);
250 class ModuleOperSHA256 : public Module
252 cmd_mksha256 *mksha256cmd;
255 ModuleOperSHA256(InspIRCd* Me) : Module::Module(Me)
258 mksha256cmd = new cmd_mksha256(ServerInstance);
259 ServerInstance->AddCommand(mksha256cmd);
262 virtual ~ModuleOperSHA256()
266 void Implements(char *List)
268 List[I_OnOperCompare] = 1;
271 virtual int OnOperCompare(const std::string &data, const std::string &input)
273 if (data.length() == SHA256_BLOCK_SIZE) // If the data is as long as a hex sha256 hash, try it as that
275 char buffer[SHA256_BLOCK_SIZE + 1];
276 SHA256(input.c_str(), buffer, strlen(input.c_str()));
277 if (!strcasecmp(data.c_str(), buffer))
285 virtual Version GetVersion()
287 return Version(1, 1, 0, 1, VF_VENDOR, API_VERSION);
292 class ModuleOperSHA256Factory : public ModuleFactory
295 ModuleOperSHA256Factory()
299 ~ModuleOperSHA256Factory()
303 virtual Module *CreateModule(InspIRCd* Me)
305 return new ModuleOperSHA256(Me);
310 extern "C" void * init_module( void )
312 return new ModuleOperSHA256Factory;