mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-16 20:40:11 +01:00
306 lines
8.4 KiB
C
306 lines
8.4 KiB
C
/*
|
|
* desblapi.c
|
|
*
|
|
* core source file for DES-150 library
|
|
* Implement DES Modes of Operation and Triple-DES.
|
|
* Adapt DES-150 to blapi API.
|
|
*
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* 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 the DES-150 library.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Nelson B. Bolyard, nelsonb@iname.com.
|
|
* Portions created by the Initial Developer are Copyright (C) 1990
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifdef FREEBL_NO_DEPEND
|
|
#include "stubs.h"
|
|
#endif
|
|
|
|
#include "des.h"
|
|
#include <stddef.h>
|
|
#include "secerr.h"
|
|
|
|
#if defined(_X86_)
|
|
/* Intel X86 CPUs do unaligned loads and stores without complaint. */
|
|
#define COPY8B(to, from, ptr) \
|
|
HALFPTR(to)[0] = HALFPTR(from)[0]; \
|
|
HALFPTR(to)[1] = HALFPTR(from)[1];
|
|
#elif defined(USE_MEMCPY)
|
|
#define COPY8B(to, from, ptr) memcpy(to, from, 8)
|
|
#else
|
|
#define COPY8B(to, from, ptr) \
|
|
if (((ptrdiff_t)(ptr) & 0x3) == 0) { \
|
|
HALFPTR(to)[0] = HALFPTR(from)[0]; \
|
|
HALFPTR(to)[1] = HALFPTR(from)[1]; \
|
|
} else if (((ptrdiff_t)(ptr) & 0x1) == 0) { \
|
|
SHORTPTR(to)[0] = SHORTPTR(from)[0]; \
|
|
SHORTPTR(to)[1] = SHORTPTR(from)[1]; \
|
|
SHORTPTR(to)[2] = SHORTPTR(from)[2]; \
|
|
SHORTPTR(to)[3] = SHORTPTR(from)[3]; \
|
|
} else { \
|
|
BYTEPTR(to)[0] = BYTEPTR(from)[0]; \
|
|
BYTEPTR(to)[1] = BYTEPTR(from)[1]; \
|
|
BYTEPTR(to)[2] = BYTEPTR(from)[2]; \
|
|
BYTEPTR(to)[3] = BYTEPTR(from)[3]; \
|
|
BYTEPTR(to)[4] = BYTEPTR(from)[4]; \
|
|
BYTEPTR(to)[5] = BYTEPTR(from)[5]; \
|
|
BYTEPTR(to)[6] = BYTEPTR(from)[6]; \
|
|
BYTEPTR(to)[7] = BYTEPTR(from)[7]; \
|
|
}
|
|
#endif
|
|
#define COPY8BTOHALF(to, from) COPY8B(to, from, from)
|
|
#define COPY8BFROMHALF(to, from) COPY8B(to, from, to)
|
|
|
|
static void
|
|
DES_ECB(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
while (len) {
|
|
DES_Do1Block(cx->ks0, in, out);
|
|
len -= 8;
|
|
in += 8;
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
static void
|
|
DES_EDE3_ECB(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
while (len) {
|
|
DES_Do1Block(cx->ks0, in, out);
|
|
len -= 8;
|
|
in += 8;
|
|
DES_Do1Block(cx->ks1, out, out);
|
|
DES_Do1Block(cx->ks2, out, out);
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
static void
|
|
DES_CBCEn(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
const BYTE * bufend = in + len;
|
|
HALF vec[2];
|
|
|
|
while (in != bufend) {
|
|
COPY8BTOHALF(vec, in);
|
|
in += 8;
|
|
vec[0] ^= cx->iv[0];
|
|
vec[1] ^= cx->iv[1];
|
|
DES_Do1Block( cx->ks0, (BYTE *)vec, (BYTE *)cx->iv);
|
|
COPY8BFROMHALF(out, cx->iv);
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
static void
|
|
DES_CBCDe(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
const BYTE * bufend;
|
|
HALF oldciphertext[2];
|
|
HALF plaintext [2];
|
|
|
|
for (bufend = in + len; in != bufend; ) {
|
|
oldciphertext[0] = cx->iv[0];
|
|
oldciphertext[1] = cx->iv[1];
|
|
COPY8BTOHALF(cx->iv, in);
|
|
in += 8;
|
|
DES_Do1Block(cx->ks0, (BYTE *)cx->iv, (BYTE *)plaintext);
|
|
plaintext[0] ^= oldciphertext[0];
|
|
plaintext[1] ^= oldciphertext[1];
|
|
COPY8BFROMHALF(out, plaintext);
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
static void
|
|
DES_EDE3CBCEn(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
const BYTE * bufend = in + len;
|
|
HALF vec[2];
|
|
|
|
while (in != bufend) {
|
|
COPY8BTOHALF(vec, in);
|
|
in += 8;
|
|
vec[0] ^= cx->iv[0];
|
|
vec[1] ^= cx->iv[1];
|
|
DES_Do1Block( cx->ks0, (BYTE *)vec, (BYTE *)cx->iv);
|
|
DES_Do1Block( cx->ks1, (BYTE *)cx->iv, (BYTE *)cx->iv);
|
|
DES_Do1Block( cx->ks2, (BYTE *)cx->iv, (BYTE *)cx->iv);
|
|
COPY8BFROMHALF(out, cx->iv);
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
static void
|
|
DES_EDE3CBCDe(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
|
|
{
|
|
const BYTE * bufend;
|
|
HALF oldciphertext[2];
|
|
HALF plaintext [2];
|
|
|
|
for (bufend = in + len; in != bufend; ) {
|
|
oldciphertext[0] = cx->iv[0];
|
|
oldciphertext[1] = cx->iv[1];
|
|
COPY8BTOHALF(cx->iv, in);
|
|
in += 8;
|
|
DES_Do1Block(cx->ks0, (BYTE *)cx->iv, (BYTE *)plaintext);
|
|
DES_Do1Block(cx->ks1, (BYTE *)plaintext, (BYTE *)plaintext);
|
|
DES_Do1Block(cx->ks2, (BYTE *)plaintext, (BYTE *)plaintext);
|
|
plaintext[0] ^= oldciphertext[0];
|
|
plaintext[1] ^= oldciphertext[1];
|
|
COPY8BFROMHALF(out, plaintext);
|
|
out += 8;
|
|
}
|
|
}
|
|
|
|
DESContext *
|
|
DES_AllocateContext(void)
|
|
{
|
|
return PORT_ZNew(DESContext);
|
|
}
|
|
|
|
SECStatus
|
|
DES_InitContext(DESContext *cx, const unsigned char *key, unsigned int keylen,
|
|
const unsigned char *iv, int mode, unsigned int encrypt,
|
|
unsigned int unused)
|
|
{
|
|
DESDirection opposite;
|
|
if (!cx) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
cx->direction = encrypt ? DES_ENCRYPT : DES_DECRYPT;
|
|
opposite = encrypt ? DES_DECRYPT : DES_ENCRYPT;
|
|
switch (mode) {
|
|
case NSS_DES: /* DES ECB */
|
|
DES_MakeSchedule( cx->ks0, key, cx->direction);
|
|
cx->worker = &DES_ECB;
|
|
break;
|
|
|
|
case NSS_DES_EDE3: /* DES EDE ECB */
|
|
cx->worker = &DES_EDE3_ECB;
|
|
if (encrypt) {
|
|
DES_MakeSchedule(cx->ks0, key, cx->direction);
|
|
DES_MakeSchedule(cx->ks1, key + 8, opposite);
|
|
DES_MakeSchedule(cx->ks2, key + 16, cx->direction);
|
|
} else {
|
|
DES_MakeSchedule(cx->ks2, key, cx->direction);
|
|
DES_MakeSchedule(cx->ks1, key + 8, opposite);
|
|
DES_MakeSchedule(cx->ks0, key + 16, cx->direction);
|
|
}
|
|
break;
|
|
|
|
case NSS_DES_CBC: /* DES CBC */
|
|
COPY8BTOHALF(cx->iv, iv);
|
|
cx->worker = encrypt ? &DES_CBCEn : &DES_CBCDe;
|
|
DES_MakeSchedule(cx->ks0, key, cx->direction);
|
|
break;
|
|
|
|
case NSS_DES_EDE3_CBC: /* DES EDE CBC */
|
|
COPY8BTOHALF(cx->iv, iv);
|
|
if (encrypt) {
|
|
cx->worker = &DES_EDE3CBCEn;
|
|
DES_MakeSchedule(cx->ks0, key, cx->direction);
|
|
DES_MakeSchedule(cx->ks1, key + 8, opposite);
|
|
DES_MakeSchedule(cx->ks2, key + 16, cx->direction);
|
|
} else {
|
|
cx->worker = &DES_EDE3CBCDe;
|
|
DES_MakeSchedule(cx->ks2, key, cx->direction);
|
|
DES_MakeSchedule(cx->ks1, key + 8, opposite);
|
|
DES_MakeSchedule(cx->ks0, key + 16, cx->direction);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
DESContext *
|
|
DES_CreateContext(const BYTE * key, const BYTE *iv, int mode, PRBool encrypt)
|
|
{
|
|
DESContext *cx = PORT_ZNew(DESContext);
|
|
SECStatus rv = DES_InitContext(cx, key, 0, iv, mode, encrypt, 0);
|
|
|
|
if (rv != SECSuccess) {
|
|
PORT_ZFree(cx, sizeof *cx);
|
|
cx = NULL;
|
|
}
|
|
return cx;
|
|
}
|
|
|
|
void
|
|
DES_DestroyContext(DESContext *cx, PRBool freeit)
|
|
{
|
|
if (cx) {
|
|
memset(cx, 0, sizeof *cx);
|
|
if (freeit)
|
|
PORT_Free(cx);
|
|
}
|
|
}
|
|
|
|
SECStatus
|
|
DES_Encrypt(DESContext *cx, BYTE *out, unsigned int *outLen,
|
|
unsigned int maxOutLen, const BYTE *in, unsigned int inLen)
|
|
{
|
|
|
|
if (inLen < 0 || (inLen % 8) != 0 || maxOutLen < inLen || !cx ||
|
|
cx->direction != DES_ENCRYPT) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
|
|
cx->worker(cx, out, in, inLen);
|
|
if (outLen)
|
|
*outLen = inLen;
|
|
return SECSuccess;
|
|
}
|
|
|
|
SECStatus
|
|
DES_Decrypt(DESContext *cx, BYTE *out, unsigned int *outLen,
|
|
unsigned int maxOutLen, const BYTE *in, unsigned int inLen)
|
|
{
|
|
|
|
if (inLen < 0 || (inLen % 8) != 0 || maxOutLen < inLen || !cx ||
|
|
cx->direction != DES_DECRYPT) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
|
|
cx->worker(cx, out, in, inLen);
|
|
if (outLen)
|
|
*outLen = inLen;
|
|
return SECSuccess;
|
|
}
|