mirror of
https://github.com/processone/ejabberd.git
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272 lines
6.8 KiB
C
272 lines
6.8 KiB
C
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is SHA 180-1 Reference Implementation (Compact version)
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*
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* The Initial Developer of the Original Code is Paul Kocher of
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* Cryptography Research. Portions created by Paul Kocher are
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* Copyright (C) 1995-9 by Cryptography Research, Inc. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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*/
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#include <stdio.h>
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#include <erl_driver.h>
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#include <ei.h>
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typedef struct {
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ErlDrvPort port;
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} sha_data;
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typedef struct {
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unsigned long H[5];
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unsigned long W[80];
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int lenW;
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unsigned long sizeHi,sizeLo;
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} j_SHA_CTX;
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static void shaHashBlock(j_SHA_CTX *ctx);
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void shaInit(j_SHA_CTX *ctx) {
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int i;
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ctx->lenW = 0;
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ctx->sizeHi = ctx->sizeLo = 0;
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/* Initialize H with the magic constants (see FIPS180 for constants)
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*/
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ctx->H[0] = 0x67452301L;
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ctx->H[1] = 0xefcdab89L;
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ctx->H[2] = 0x98badcfeL;
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ctx->H[3] = 0x10325476L;
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ctx->H[4] = 0xc3d2e1f0L;
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for (i = 0; i < 80; i++)
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ctx->W[i] = 0;
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}
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void shaUpdate(j_SHA_CTX *ctx, unsigned char *dataIn, int len) {
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int i;
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/* Read the data into W and process blocks as they get full
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*/
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for (i = 0; i < len; i++) {
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ctx->W[ctx->lenW / 4] <<= 8;
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ctx->W[ctx->lenW / 4] |= (unsigned long)dataIn[i];
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if ((++ctx->lenW) % 64 == 0) {
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shaHashBlock(ctx);
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ctx->lenW = 0;
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}
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ctx->sizeLo += 8;
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ctx->sizeHi += (ctx->sizeLo < 8);
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}
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}
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void shaFinal(j_SHA_CTX *ctx, unsigned char hashout[20]) {
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unsigned char pad0x80 = 0x80;
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unsigned char pad0x00 = 0x00;
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unsigned char padlen[8];
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int i;
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/* Pad with a binary 1 (e.g. 0x80), then zeroes, then length
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*/
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padlen[0] = (unsigned char)((ctx->sizeHi >> 24) & 255);
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padlen[1] = (unsigned char)((ctx->sizeHi >> 16) & 255);
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padlen[2] = (unsigned char)((ctx->sizeHi >> 8) & 255);
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padlen[3] = (unsigned char)((ctx->sizeHi >> 0) & 255);
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padlen[4] = (unsigned char)((ctx->sizeLo >> 24) & 255);
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padlen[5] = (unsigned char)((ctx->sizeLo >> 16) & 255);
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padlen[6] = (unsigned char)((ctx->sizeLo >> 8) & 255);
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padlen[7] = (unsigned char)((ctx->sizeLo >> 0) & 255);
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shaUpdate(ctx, &pad0x80, 1);
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while (ctx->lenW != 56)
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shaUpdate(ctx, &pad0x00, 1);
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shaUpdate(ctx, padlen, 8);
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/* Output hash
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*/
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for (i = 0; i < 20; i++) {
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hashout[i] = (unsigned char)(ctx->H[i / 4] >> 24);
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ctx->H[i / 4] <<= 8;
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}
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/*
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* Re-initialize the context (also zeroizes contents)
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*/
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shaInit(ctx);
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}
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void shaBlock(unsigned char *dataIn, int len, unsigned char hashout[20]) {
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j_SHA_CTX ctx;
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shaInit(&ctx);
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shaUpdate(&ctx, dataIn, len);
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shaFinal(&ctx, hashout);
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}
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#define SHA_ROTL(X,n) ((((X) << (n)) | ((X) >> (32-(n)))) & 0xffffffffL)
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static void shaHashBlock(j_SHA_CTX *ctx) {
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int t;
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unsigned long A,B,C,D,E,TEMP;
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for (t = 16; t <= 79; t++)
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ctx->W[t] =
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SHA_ROTL(ctx->W[t-3] ^ ctx->W[t-8] ^ ctx->W[t-14] ^ ctx->W[t-16], 1);
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A = ctx->H[0];
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B = ctx->H[1];
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C = ctx->H[2];
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D = ctx->H[3];
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E = ctx->H[4];
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for (t = 0; t <= 19; t++) {
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TEMP = (SHA_ROTL(A,5) + (((C^D)&B)^D) + E + ctx->W[t] + 0x5a827999L) & 0xffffffffL;
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E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP;
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}
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for (t = 20; t <= 39; t++) {
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TEMP = (SHA_ROTL(A,5) + (B^C^D) + E + ctx->W[t] + 0x6ed9eba1L) & 0xffffffffL;
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E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP;
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}
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for (t = 40; t <= 59; t++) {
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TEMP = (SHA_ROTL(A,5) + ((B&C)|(D&(B|C))) + E + ctx->W[t] + 0x8f1bbcdcL) & 0xffffffffL;
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E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP;
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}
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for (t = 60; t <= 79; t++) {
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TEMP = (SHA_ROTL(A,5) + (B^C^D) + E + ctx->W[t] + 0xca62c1d6L) & 0xffffffffL;
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E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP;
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}
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ctx->H[0] += A;
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ctx->H[1] += B;
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ctx->H[2] += C;
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ctx->H[3] += D;
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ctx->H[4] += E;
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}
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/*----------------------------------------------------------------------------
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*
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* This code added by Thomas "temas" Muldowney for Jabber compatability
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*
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*---------------------------------------------------------------------------*/
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char *shahash(char *str)
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{
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static char final[41];
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char *pos;
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unsigned char hashval[20];
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int x;
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if(!str || strlen(str) == 0)
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return NULL;
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shaBlock((unsigned char *)str, strlen(str), hashval);
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pos = final;
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for(x=0;x<20;x++)
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{
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snprintf(pos, 3, "%02x", hashval[x]);
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pos += 2;
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}
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return (char *)final;
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}
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void shahash_r(const char* str, char hashbuf[41])
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{
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int x;
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char *pos;
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unsigned char hashval[20];
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if(!str || strlen(str) == 0)
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return;
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shaBlock((unsigned char *)str, strlen(str), hashval);
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pos = hashbuf;
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for(x=0;x<20;x++)
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{
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snprintf(pos, 3, "%02x", hashval[x]);
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pos += 2;
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}
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return;
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}
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static ErlDrvData sha_erl_start(ErlDrvPort port, char *buff)
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{
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sha_data* d = (sha_data*)driver_alloc(sizeof(sha_data));
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d->port = port;
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return (ErlDrvData)d;
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}
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static void sha_erl_stop(ErlDrvData handle)
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{
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driver_free((char*)handle);
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}
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static void sha_erl_output(ErlDrvData handle, char *buff, int bufflen)
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{
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sha_data* d = (sha_data*)handle;
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ei_x_buff buf;
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static char final[41];
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char *pos;
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unsigned char hashval[20];
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int x;
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if(bufflen == 0)
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final[0] = '\000';
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else
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{
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shaBlock(buff, bufflen, hashval);
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pos = final;
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for(x=0;x<20;x++)
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{
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snprintf(pos, 3, "%02x", hashval[x]);
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pos += 2;
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}
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}
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ei_x_new_with_version(&buf);
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ei_x_encode_string(&buf, final);
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driver_output(d->port, buf.buff, buf.index);
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ei_x_free(&buf);
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}
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ErlDrvEntry sha_driver_entry = {
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NULL, /* F_PTR init, N/A */
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sha_erl_start, /* L_PTR start, called when port is opened */
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sha_erl_stop, /* F_PTR stop, called when port is closed */
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sha_erl_output, /* F_PTR output, called when erlang has sent */
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NULL, /* F_PTR ready_input, called when input descriptor ready */
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NULL, /* F_PTR ready_output, called when output descriptor ready */
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"sha_erl", /* char *driver_name, the argument to open_port */
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NULL, /* F_PTR finish, called when unloaded */
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NULL, /* F_PTR control, port_command callback */
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NULL, /* F_PTR timeout, reserved */
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NULL /* F_PTR outputv, reserved */
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};
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DRIVER_INIT(sha_erl) /* must match name in driver_entry */
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{
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return &sha_driver_entry;
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}
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