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;
62 unsigned char block[2 * SHA256_BLOCK_SIZE];
66 void SHA256Init(struct SHA256Context *ctx);
67 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb);
68 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len);
69 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest);
70 void SHA256(const char *src, char *dest, int len);
72 #define SHFR(x, n) (x >> n)
73 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
74 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
75 #define CH(x, y, z) ((x & y) ^ (~x & z))
76 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
78 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
79 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
80 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
81 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
83 #define UNPACK32(x, str) \
85 *((str) + 3) = (uint8_t) ((x) ); \
86 *((str) + 2) = (uint8_t) ((x) >> 8); \
87 *((str) + 1) = (uint8_t) ((x) >> 16); \
88 *((str) + 0) = (uint8_t) ((x) >> 24); \
91 #define PACK32(str, x) \
93 *(x) = ((uint32_t) *((str) + 3) ) \
94 | ((uint32_t) *((str) + 2) << 8) \
95 | ((uint32_t) *((str) + 1) << 16) \
96 | ((uint32_t) *((str) + 0) << 24); \
99 /* Macros used for loops unrolling */
101 #define SHA256_SCR(i) \
103 w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
104 + SHA256_F3(w[i - 15]) + w[i - 16]; \
107 uint32_t sha256_h0[8] =
109 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
110 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
113 uint32_t sha256_k[64] =
115 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
116 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
117 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
118 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
119 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
120 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
121 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
122 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
123 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
124 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
125 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
126 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
127 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
128 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
129 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
130 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
133 void SHA256Init(struct SHA256Context *ctx)
135 for (int i = 0; i < 8; i++)
136 ctx->h[i] = sha256_h0[i];
141 void SHA256Transform(struct SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
145 unsigned char *sub_block;
146 for (unsigned int i = 1; i <= block_nb; i++)
149 sub_block = message + ((i - 1) << 6);
151 for (j = 0; j < 16; j++)
152 PACK32(&sub_block[j << 2], &w[j]);
153 for (j = 16; j < 64; j++)
155 for (j = 0; j < 8; j++)
157 for (j = 0; j < 64; j++)
159 uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
160 uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
170 for (j = 0; j < 8; j++)
175 void SHA256Update(struct SHA256Context *ctx, unsigned char *message, unsigned int len)
177 unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
178 memcpy(&ctx->block[ctx->len], message, rem_len);
179 if (ctx->len + len < SHA256_BLOCK_SIZE)
184 unsigned int new_len = len - rem_len;
185 unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
186 unsigned char *shifted_message = message + rem_len;
187 SHA256Transform(ctx, ctx->block, 1);
188 SHA256Transform(ctx, shifted_message, block_nb);
189 rem_len = new_len % SHA256_BLOCK_SIZE;
190 memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
192 ctx->tot_len += (block_nb + 1) << 6;
195 void SHA256Final(struct SHA256Context *ctx, unsigned char *digest)
197 unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
198 unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
199 unsigned int pm_len = block_nb << 6;
200 memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
201 ctx->block[ctx->len] = 0x80;
202 UNPACK32(len_b, ctx->block + pm_len - 4);
203 SHA256Transform(ctx, ctx->block, block_nb);
204 for (int i = 0 ; i < 8; i++)
205 UNPACK32(ctx->h[i], &digest[i << 2]);
208 void SHA256(const char *src, char *dest, int len)
211 unsigned char bytehash[SHA256_DIGEST_SIZE];
212 struct SHA256Context ctx;
214 SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
215 SHA256Final(&ctx, bytehash);
217 const char *hxc = "0123456789abcdef";
218 for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
220 dest[j++] = hxc[bytehash[i] / 16];
221 dest[j++] = hxc[bytehash[i] % 16];
226 class cmd_mksha256 : public command_t
229 cmd_mksha256() : command_t("MKSHA256", 'o', 1)
231 this->source = "m_opersha256.so";
234 void Handle(char **parameters, int pcnt, userrec *user)
236 char buffer[SHA256_BLOCK_SIZE + 1];
237 SHA256(parameters[0], buffer, strlen(parameters[0]));
238 WriteServ(user->fd, "NOTICE %s :SHA256 hashed password for %s is %s", user->nick, parameters[0], buffer);
242 class ModuleOperSHA256 : public Module
244 cmd_mksha256 *mksha256cmd;
247 ModuleOperSHA256(Server *Me) : Module::Module(Me)
250 mksha256cmd = new cmd_mksha256();
251 Srv->AddCommand(mksha256cmd);
254 virtual ~ModuleOperSHA256()
258 void Implements(char *List)
260 List[I_OnOperCompare] = 1;
263 virtual int OnOperCompare(const std::string &data, const std::string &input)
265 if (data.length() == SHA256_BLOCK_SIZE) // If the data is as long as a hex sha256 hash, try it as that
267 char buffer[SHA256_BLOCK_SIZE + 1];
268 SHA256(input.c_str(), buffer, strlen(input.c_str()));
269 if (!strcasecmp(data.c_str(), buffer))
277 virtual Version GetVersion()
279 return Version(1, 0, 0, 1, 0);
284 class ModuleOperSHA256Factory : public ModuleFactory
287 ModuleOperSHA256Factory()
291 ~ModuleOperSHA256Factory()
295 virtual Module *CreateModule(Server* Me)
297 return new ModuleOperSHA256(Me);
302 extern "C" void * init_module( void )
304 return new ModuleOperSHA256Factory;