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xmpp.chapril.org-ejabberd/sha_erl.c

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