1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r/* m_sha256 - Based on m_opersha256 written by Special <john@yarbbles.com>
\r * Modified and improved by Craig Edwards, December 2006.
\r *
\r *
\r * FIPS 180-2 SHA-224/256/384/512 implementation
\r * Last update: 05/23/2005
\r * Issue date: 04/30/2005
\r *
\r * Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
\r * All rights reserved.
\r *
\r * Redistribution and use in source and binary forms, with or without
\r * modification, are permitted provided that the following conditions
\r * are met:
\r * 1. Redistributions of source code must retain the above copyright
\r * notice, this list of conditions and the following disclaimer.
\r * 2. Redistributions in binary form must reproduce the above copyright
\r * notice, this list of conditions and the following disclaimer in the
\r * documentation and/or other materials provided with the distribution.
\r * 3. Neither the name of the project nor the names of its contributors
\r * may be used to endorse or promote products derived from this software
\r * without specific prior written permission.
\r *
\r * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
\r * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\r * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\r * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
\r * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
\r * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\r * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\r * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\r * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\r * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\r * SUCH DAMAGE.
\r */
\r\r/* $ModDesc: Allows for SHA-256 encrypted oper passwords */
\r/* $ModDep: m_hash.h */
\r\r#include "inspircd.h"
\r#ifdef HAS_STDINT
\r#include <stdint.h>
\r#endif
\r#include "users.h"
\r#include "channels.h"
\r#include "modules.h"
\r#include "m_hash.h"
\r\r#ifndef HAS_STDINT
\rtypedef unsigned int uint32_t;
\r#endif
\r\r/** An sha 256 context, used by m_opersha256
\r */
\rclass SHA256Context : public classbase
\r{
\r public:
\r unsigned int tot_len;
\r unsigned int len;
\r unsigned char block[2 * SHA256_BLOCK_SIZE];
\r uint32_t h[8];
\r};
\r\r#define SHFR(x, n) (x >> n)
\r#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
\r#define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
\r#define CH(x, y, z) ((x & y) ^ (~x & z))
\r#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
\r\r#define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
\r#define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
\r#define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
\r#define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
\r\r#define UNPACK32(x, str) \
\r{ \
\r *((str) + 3) = (uint8_t) ((x) ); \
\r *((str) + 2) = (uint8_t) ((x) >> 8); \
\r *((str) + 1) = (uint8_t) ((x) >> 16); \
\r *((str) + 0) = (uint8_t) ((x) >> 24); \
\r}
\r\r#define PACK32(str, x) \
\r{ \
\r *(x) = ((uint32_t) *((str) + 3) ) \
\r | ((uint32_t) *((str) + 2) << 8) \
\r | ((uint32_t) *((str) + 1) << 16) \
\r | ((uint32_t) *((str) + 0) << 24); \
\r}
\r\r/* Macros used for loops unrolling */
\r\r#define SHA256_SCR(i) \
\r{ \
\r w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
\r + SHA256_F3(w[i - 15]) + w[i - 16]; \
\r}
\r\rconst unsigned int sha256_h0[8] =
\r{
\r 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
\r 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
\r};
\r\ruint32_t sha256_k[64] =
\r{
\r 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
\r 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
\r 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
\r 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
\r 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
\r 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
\r 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
\r 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
\r 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
\r 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
\r 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
\r 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
\r 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
\r 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
\r 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
\r 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
\r};
\r\rclass ModuleSHA256 : public Module
\r{
\r void SHA256Init(SHA256Context *ctx, const unsigned int* key)
\r {
\r if (key)
\r {
\r for (int i = 0; i < 8; i++)
\r ctx->h[i] = key[i];
\r }
\r else
\r {
\r for (int i = 0; i < 8; i++)
\r ctx->h[i] = sha256_h0[i];
\r }
\r ctx->len = 0;
\r ctx->tot_len = 0;
\r }
\r\r void SHA256Transform(SHA256Context *ctx, unsigned char *message, unsigned int block_nb)
\r {
\r uint32_t w[64];
\r uint32_t wv[8];
\r unsigned char *sub_block;
\r for (unsigned int i = 1; i <= block_nb; i++)
\r {
\r int j;
\r sub_block = message + ((i - 1) << 6);
\r \r for (j = 0; j < 16; j++)
\r PACK32(&sub_block[j << 2], &w[j]);
\r for (j = 16; j < 64; j++)
\r SHA256_SCR(j);
\r for (j = 0; j < 8; j++)
\r wv[j] = ctx->h[j];
\r for (j = 0; j < 64; j++)
\r {
\r uint32_t t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
\r uint32_t t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
\r wv[7] = wv[6];
\r wv[6] = wv[5];
\r wv[5] = wv[4];
\r wv[4] = wv[3] + t1;
\r wv[3] = wv[2];
\r wv[2] = wv[1];
\r wv[1] = wv[0];
\r wv[0] = t1 + t2;
\r }
\r for (j = 0; j < 8; j++)
\r ctx->h[j] += wv[j];
\r }
\r }
\r \r void SHA256Update(SHA256Context *ctx, unsigned char *message, unsigned int len)
\r {
\r unsigned int rem_len = SHA256_BLOCK_SIZE - ctx->len;
\r memcpy(&ctx->block[ctx->len], message, rem_len);
\r if (ctx->len + len < SHA256_BLOCK_SIZE)
\r {
\r ctx->len += len;
\r return;
\r }
\r unsigned int new_len = len - rem_len;
\r unsigned int block_nb = new_len / SHA256_BLOCK_SIZE;
\r unsigned char *shifted_message = message + rem_len;
\r SHA256Transform(ctx, ctx->block, 1);
\r SHA256Transform(ctx, shifted_message, block_nb);
\r rem_len = new_len % SHA256_BLOCK_SIZE;
\r memcpy(ctx->block, &shifted_message[block_nb << 6],rem_len);
\r ctx->len = rem_len;
\r ctx->tot_len += (block_nb + 1) << 6;
\r }
\r \r void SHA256Final(SHA256Context *ctx, unsigned char *digest)
\r {
\r unsigned int block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
\r unsigned int len_b = (ctx->tot_len + ctx->len) << 3;
\r unsigned int pm_len = block_nb << 6;
\r memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
\r ctx->block[ctx->len] = 0x80;
\r UNPACK32(len_b, ctx->block + pm_len - 4);
\r SHA256Transform(ctx, ctx->block, block_nb);
\r for (int i = 0 ; i < 8; i++)
\r UNPACK32(ctx->h[i], &digest[i << 2]);
\r }
\r \r void SHA256(const char *src, char *dest, int len, const char* hxc, const unsigned int* key = NULL)
\r {
\r // Generate the hash
\r unsigned char bytehash[SHA256_DIGEST_SIZE];
\r SHA256Context ctx;
\r SHA256Init(&ctx, key);
\r SHA256Update(&ctx, (unsigned char *)src, (unsigned int)len);
\r SHA256Final(&ctx, bytehash);
\r // Convert it to hex
\r for (int i = 0, j = 0; i < SHA256_DIGEST_SIZE; i++)
\r {
\r dest[j++] = hxc[bytehash[i] / 16];
\r dest[j++] = hxc[bytehash[i] % 16];
\r dest[j] = '\0';
\r }
\r }
\r\r unsigned int* key;
\r char* chars;
\r\r public:
\r\r ModuleSHA256(InspIRCd* Me) : Module(Me), key(NULL), chars(NULL)
\r {
\r ServerInstance->PublishInterface("HashRequest", this);
\r }
\r\r virtual ~ModuleSHA256()
\r {
\r ServerInstance->UnpublishInterface("HashRequest", this);
\r }
\r\r void Implements(char *List)
\r {
\r List[I_OnRequest] = 1;
\r }
\r\r virtual char* OnRequest(Request* request)
\r {
\r HashRequest* SHA = (HashRequest*)request;
\r if (strcmp("KEY", request->GetId()) == 0)
\r {
\r this->key = (unsigned int*)SHA->GetKeyData();
\r }
\r else if (strcmp("HEX", request->GetId()) == 0)
\r {
\r this->chars = (char*)SHA->GetOutputs();
\r }
\r else if (strcmp("SUM", request->GetId()) == 0)
\r {
\r static char data[MAXBUF];
\r SHA256((const char*)SHA->GetHashData(), data, strlen(SHA->GetHashData()), chars ? chars : "0123456789abcdef", key);
\r return data;
\r }
\r else if (strcmp("NAME", request->GetId()) == 0)
\r {
\r return "sha256";
\r }
\r else if (strcmp("RESET", request->GetId()) == 0)
\r {
\r this->chars = NULL;
\r this->key = NULL;
\r }
\r return NULL;
\r }
\r\r virtual Version GetVersion()
\r {
\r return Version(1, 1, 0, 1, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
\r }
\r};
\r\rMODULE_INIT(ModuleSHA256)
\r\r