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"
52 #define SHA256_DIGEST_SIZE (256 / 8)
53 #define SHA256_BLOCK_SIZE (512 / 8)
56 typedef unsigned int uint32_t;
59 class SHA256Context : public classbase
64 unsigned char block[2 * SHA256_BLOCK_SIZE];
68 void SHA256Init(struct SHA256Context *ctx);
69 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb);
70 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len);
71 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest);
72 void SHA256(const char *src, char *dest, int len);
74 #define SHFR(x, n) (x >> n)
75 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
76 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
77 #define CH(x, y, z) ((x & y) ^ (~x & z))
78 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
80 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
81 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
82 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
83 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
85 #define UNPACK32(x, str) \
87 *((str) + 3) = (uint8_t) ((x) ); \
88 *((str) + 2) = (uint8_t) ((x) >> 8); \
89 *((str) + 1) = (uint8_t) ((x) >> 16); \
90 *((str) + 0) = (uint8_t) ((x) >> 24); \
93 #define PACK32(str, x) \
95 *(x) = ((uint32_t) *((str) + 3) ) \
96 | ((uint32_t) *((str) + 2) << 8) \
97 | ((uint32_t) *((str) + 1) << 16) \
98 | ((uint32_t) *((str) + 0) << 24); \
101 /* Macros used for loops unrolling */
103 #define SHA256_SCR(i) \
105 w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
106 + SHA256_F3(w[i - 15]) + w[i - 16]; \
109 uint32_t sha256_h0[8] =
111 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
112 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
115 uint32_t sha256_k[64] =
117 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
118 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
119 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
120 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
121 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
122 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
123 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
124 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
125 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
126 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
127 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
128 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
129 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
130 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
131 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
132 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
135 void SHA256Init(struct SHA256Context *ctx)
137 for (int i = 0; i < 8; i++)
138 ctx->h[i] = sha256_h0[i];
143 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
147 unsigned char *sub_block;
148 for (unsigned int i = 1; i <= block_nb; i++)
151 sub_block = message + ((i - 1) << 6);
153 for (j = 0; j < 16; j++)
154 PACK32(&sub_block[j << 2], &w[j]);
155 for (j = 16; j < 64; j++)
157 for (j = 0; j < 8; j++)
159 for (j = 0; j < 64; j++)
161 uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
162 uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
172 for (j = 0; j < 8; j++)
177 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len)
179 unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
180 memcpy(&ctx->block[ctx->len], message, rem_len);
181 if (ctx->len + len < SHA256_BLOCK_SIZE)
186 unsigned int new_len = len - rem_len;
187 unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
188 unsigned char *shifted_message = message + rem_len;
189 SHA256Transform(ctx, ctx->block, 1);
190 SHA256Transform(ctx, shifted_message, block_nb);
191 rem_len = new_len % SHA256_BLOCK_SIZE;
192 memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
194 ctx->tot_len += (block_nb + 1) << 6;
197 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest)
199 unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
200 unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
201 unsigned int pm_len = block_nb << 6;
202 memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
203 ctx->block[ctx->len] = 0x80;
204 UNPACK32(len_b, ctx->block + pm_len - 4);
205 SHA256Transform(ctx, ctx->block, block_nb);
206 for (int i = 0 ; i < 8; i++)
207 UNPACK32(ctx->h[i], &digest[i << 2]);
210 void SHA256(const char *src, char *dest, int len)
213 unsigned char bytehash[SHA256_DIGEST_SIZE];
214 struct SHA256Context ctx;
216 SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
217 SHA256Final(&ctx, bytehash);
219 const char *hxc = "0123456789abcdef";
220 for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
222 dest[j++] = hxc[bytehash[i] / 16];
223 dest[j++] = hxc[bytehash[i] % 16];
228 class cmd_mksha256 : public command_t
231 cmd_mksha256() : command_t("MKSHA256", 'o', 1)
233 this->source = "m_opersha256.so";
234 syntax = "<any-text>";
237 void Handle(const char** parameters, int pcnt, userrec *user)
239 char buffer[SHA256_BLOCK_SIZE + 1];
240 SHA256(parameters[0], buffer, strlen(parameters[0]));
241 user->WriteServ( "NOTICE %s :SHA256 hashed password for %s is %s", user->nick, parameters[0], buffer);
245 class ModuleOperSHA256 : public Module
247 cmd_mksha256 *mksha256cmd;
250 ModuleOperSHA256(InspIRCd* Me) : Module::Module(Me)
253 mksha256cmd = new cmd_mksha256();
254 Srv->AddCommand(mksha256cmd);
257 virtual ~ModuleOperSHA256()
261 void Implements(char *List)
263 List[I_OnOperCompare] = 1;
266 virtual int OnOperCompare(const std::string &data, const std::string &input)
268 if (data.length() == SHA256_BLOCK_SIZE) // If the data is as long as a hex sha256 hash, try it as that
270 char buffer[SHA256_BLOCK_SIZE + 1];
271 SHA256(input.c_str(), buffer, strlen(input.c_str()));
272 if (!strcasecmp(data.c_str(), buffer))
280 virtual Version GetVersion()
282 return Version(1, 0, 0, 1, 0);
287 class ModuleOperSHA256Factory : public ModuleFactory
290 ModuleOperSHA256Factory()
294 ~ModuleOperSHA256Factory()
298 virtual Module *CreateModule(InspIRCd* Me)
300 return new ModuleOperSHA256(Me);
305 extern "C" void * init_module( void )
307 return new ModuleOperSHA256Factory;