mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
392 lines
12 KiB
C
392 lines
12 KiB
C
/* ***** 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 Netscape security libraries.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1994-2000
|
|
* 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 ***** */
|
|
|
|
/*
|
|
* Diffie-Hellman parameter generation, key generation, and secret derivation.
|
|
* KEA secret generation and verification.
|
|
*
|
|
* $Id: dh.c,v 1.8 2008/11/18 19:48:22 rrelyea%redhat.com Exp $
|
|
*/
|
|
#ifdef FREEBL_NO_DEPEND
|
|
#include "stubs.h"
|
|
#endif
|
|
|
|
#include "prerr.h"
|
|
#include "secerr.h"
|
|
|
|
#include "blapi.h"
|
|
#include "secitem.h"
|
|
#include "mpi.h"
|
|
#include "mpprime.h"
|
|
#include "secmpi.h"
|
|
|
|
#define DH_SECRET_KEY_LEN 20
|
|
#define KEA_DERIVED_SECRET_LEN 128
|
|
|
|
SECStatus
|
|
DH_GenParam(int primeLen, DHParams **params)
|
|
{
|
|
PRArenaPool *arena;
|
|
DHParams *dhparams;
|
|
unsigned char *pb = NULL;
|
|
unsigned char *ab = NULL;
|
|
unsigned long counter = 0;
|
|
mp_int p, q, a, h, psub1, test;
|
|
mp_err err = MP_OKAY;
|
|
SECStatus rv = SECSuccess;
|
|
if (!params || primeLen < 0) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
arena = PORT_NewArena(NSS_FREEBL_DEFAULT_CHUNKSIZE);
|
|
if (!arena) {
|
|
PORT_SetError(SEC_ERROR_NO_MEMORY);
|
|
return SECFailure;
|
|
}
|
|
dhparams = (DHParams *)PORT_ArenaZAlloc(arena, sizeof(DHParams));
|
|
if (!dhparams) {
|
|
PORT_SetError(SEC_ERROR_NO_MEMORY);
|
|
PORT_FreeArena(arena, PR_TRUE);
|
|
return SECFailure;
|
|
}
|
|
dhparams->arena = arena;
|
|
MP_DIGITS(&p) = 0;
|
|
MP_DIGITS(&q) = 0;
|
|
MP_DIGITS(&a) = 0;
|
|
MP_DIGITS(&h) = 0;
|
|
MP_DIGITS(&psub1) = 0;
|
|
MP_DIGITS(&test) = 0;
|
|
CHECK_MPI_OK( mp_init(&p) );
|
|
CHECK_MPI_OK( mp_init(&q) );
|
|
CHECK_MPI_OK( mp_init(&a) );
|
|
CHECK_MPI_OK( mp_init(&h) );
|
|
CHECK_MPI_OK( mp_init(&psub1) );
|
|
CHECK_MPI_OK( mp_init(&test) );
|
|
/* generate prime with MPI, uses Miller-Rabin to generate strong prime. */
|
|
pb = PORT_Alloc(primeLen);
|
|
CHECK_SEC_OK( RNG_GenerateGlobalRandomBytes(pb, primeLen) );
|
|
pb[0] |= 0x80; /* set high-order bit */
|
|
pb[primeLen-1] |= 0x01; /* set low-order bit */
|
|
CHECK_MPI_OK( mp_read_unsigned_octets(&p, pb, primeLen) );
|
|
CHECK_MPI_OK( mpp_make_prime(&p, primeLen * 8, PR_TRUE, &counter) );
|
|
/* construct Sophie-Germain prime q = (p-1)/2. */
|
|
CHECK_MPI_OK( mp_sub_d(&p, 1, &psub1) );
|
|
CHECK_MPI_OK( mp_div_2(&psub1, &q) );
|
|
/* construct a generator from the prime. */
|
|
ab = PORT_Alloc(primeLen);
|
|
/* generate a candidate number a in p's field */
|
|
CHECK_SEC_OK( RNG_GenerateGlobalRandomBytes(ab, primeLen) );
|
|
CHECK_MPI_OK( mp_read_unsigned_octets(&a, ab, primeLen) );
|
|
/* force a < p (note that quot(a/p) <= 1) */
|
|
if ( mp_cmp(&a, &p) > 0 )
|
|
CHECK_MPI_OK( mp_sub(&a, &p, &a) );
|
|
do {
|
|
/* check that a is in the range [2..p-1] */
|
|
if ( mp_cmp_d(&a, 2) < 0 || mp_cmp(&a, &psub1) >= 0) {
|
|
/* a is outside of the allowed range. Set a=3 and keep going. */
|
|
mp_set(&a, 3);
|
|
}
|
|
/* if a**q mod p != 1 then a is a generator */
|
|
CHECK_MPI_OK( mp_exptmod(&a, &q, &p, &test) );
|
|
if ( mp_cmp_d(&test, 1) != 0 )
|
|
break;
|
|
/* increment the candidate and try again. */
|
|
CHECK_MPI_OK( mp_add_d(&a, 1, &a) );
|
|
} while (PR_TRUE);
|
|
MPINT_TO_SECITEM(&p, &dhparams->prime, arena);
|
|
MPINT_TO_SECITEM(&a, &dhparams->base, arena);
|
|
*params = dhparams;
|
|
cleanup:
|
|
mp_clear(&p);
|
|
mp_clear(&q);
|
|
mp_clear(&a);
|
|
mp_clear(&h);
|
|
mp_clear(&psub1);
|
|
mp_clear(&test);
|
|
if (pb) PORT_ZFree(pb, primeLen);
|
|
if (ab) PORT_ZFree(ab, primeLen);
|
|
if (err) {
|
|
MP_TO_SEC_ERROR(err);
|
|
rv = SECFailure;
|
|
}
|
|
if (rv)
|
|
PORT_FreeArena(arena, PR_TRUE);
|
|
return rv;
|
|
}
|
|
|
|
SECStatus
|
|
DH_NewKey(DHParams *params, DHPrivateKey **privKey)
|
|
{
|
|
PRArenaPool *arena;
|
|
DHPrivateKey *key;
|
|
mp_int g, xa, p, Ya;
|
|
mp_err err = MP_OKAY;
|
|
SECStatus rv = SECSuccess;
|
|
if (!params || !privKey) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
arena = PORT_NewArena(NSS_FREEBL_DEFAULT_CHUNKSIZE);
|
|
if (!arena) {
|
|
PORT_SetError(SEC_ERROR_NO_MEMORY);
|
|
return SECFailure;
|
|
}
|
|
key = (DHPrivateKey *)PORT_ArenaZAlloc(arena, sizeof(DHPrivateKey));
|
|
if (!key) {
|
|
PORT_SetError(SEC_ERROR_NO_MEMORY);
|
|
PORT_FreeArena(arena, PR_TRUE);
|
|
return SECFailure;
|
|
}
|
|
key->arena = arena;
|
|
MP_DIGITS(&g) = 0;
|
|
MP_DIGITS(&xa) = 0;
|
|
MP_DIGITS(&p) = 0;
|
|
MP_DIGITS(&Ya) = 0;
|
|
CHECK_MPI_OK( mp_init(&g) );
|
|
CHECK_MPI_OK( mp_init(&xa) );
|
|
CHECK_MPI_OK( mp_init(&p) );
|
|
CHECK_MPI_OK( mp_init(&Ya) );
|
|
/* Set private key's p */
|
|
CHECK_SEC_OK( SECITEM_CopyItem(arena, &key->prime, ¶ms->prime) );
|
|
SECITEM_TO_MPINT(key->prime, &p);
|
|
/* Set private key's g */
|
|
CHECK_SEC_OK( SECITEM_CopyItem(arena, &key->base, ¶ms->base) );
|
|
SECITEM_TO_MPINT(key->base, &g);
|
|
/* Generate private key xa */
|
|
SECITEM_AllocItem(arena, &key->privateValue, DH_SECRET_KEY_LEN);
|
|
RNG_GenerateGlobalRandomBytes(key->privateValue.data,
|
|
key->privateValue.len);
|
|
SECITEM_TO_MPINT( key->privateValue, &xa );
|
|
/* xa < p */
|
|
CHECK_MPI_OK( mp_mod(&xa, &p, &xa) );
|
|
/* Compute public key Ya = g ** xa mod p */
|
|
CHECK_MPI_OK( mp_exptmod(&g, &xa, &p, &Ya) );
|
|
MPINT_TO_SECITEM(&Ya, &key->publicValue, key->arena);
|
|
*privKey = key;
|
|
cleanup:
|
|
mp_clear(&g);
|
|
mp_clear(&xa);
|
|
mp_clear(&p);
|
|
mp_clear(&Ya);
|
|
if (err) {
|
|
MP_TO_SEC_ERROR(err);
|
|
rv = SECFailure;
|
|
}
|
|
if (rv)
|
|
PORT_FreeArena(arena, PR_TRUE);
|
|
return rv;
|
|
}
|
|
|
|
SECStatus
|
|
DH_Derive(SECItem *publicValue,
|
|
SECItem *prime,
|
|
SECItem *privateValue,
|
|
SECItem *derivedSecret,
|
|
unsigned int maxOutBytes)
|
|
{
|
|
mp_int p, Xa, Yb, ZZ;
|
|
mp_err err = MP_OKAY;
|
|
unsigned int len = 0, nb;
|
|
unsigned char *secret = NULL;
|
|
if (!publicValue || !prime || !privateValue || !derivedSecret) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
memset(derivedSecret, 0, sizeof *derivedSecret);
|
|
MP_DIGITS(&p) = 0;
|
|
MP_DIGITS(&Xa) = 0;
|
|
MP_DIGITS(&Yb) = 0;
|
|
MP_DIGITS(&ZZ) = 0;
|
|
CHECK_MPI_OK( mp_init(&p) );
|
|
CHECK_MPI_OK( mp_init(&Xa) );
|
|
CHECK_MPI_OK( mp_init(&Yb) );
|
|
CHECK_MPI_OK( mp_init(&ZZ) );
|
|
SECITEM_TO_MPINT(*publicValue, &Yb);
|
|
SECITEM_TO_MPINT(*privateValue, &Xa);
|
|
SECITEM_TO_MPINT(*prime, &p);
|
|
/* ZZ = (Yb)**Xa mod p */
|
|
CHECK_MPI_OK( mp_exptmod(&Yb, &Xa, &p, &ZZ) );
|
|
/* number of bytes in the derived secret */
|
|
len = mp_unsigned_octet_size(&ZZ);
|
|
/* allocate a buffer which can hold the entire derived secret. */
|
|
secret = PORT_Alloc(len);
|
|
/* grab the derived secret */
|
|
err = mp_to_unsigned_octets(&ZZ, secret, len);
|
|
if (err >= 0) err = MP_OKAY;
|
|
/* Take minimum of bytes requested and bytes in derived secret,
|
|
** if maxOutBytes is 0 take all of the bytes from the derived secret.
|
|
*/
|
|
if (maxOutBytes > 0)
|
|
nb = PR_MIN(len, maxOutBytes);
|
|
else
|
|
nb = len;
|
|
SECITEM_AllocItem(NULL, derivedSecret, nb);
|
|
memcpy(derivedSecret->data, secret, nb);
|
|
cleanup:
|
|
mp_clear(&p);
|
|
mp_clear(&Xa);
|
|
mp_clear(&Yb);
|
|
mp_clear(&ZZ);
|
|
if (secret) {
|
|
/* free the buffer allocated for the full secret. */
|
|
PORT_ZFree(secret, len);
|
|
}
|
|
if (err) {
|
|
MP_TO_SEC_ERROR(err);
|
|
if (derivedSecret->data)
|
|
PORT_ZFree(derivedSecret->data, derivedSecret->len);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
SECStatus
|
|
KEA_Derive(SECItem *prime,
|
|
SECItem *public1,
|
|
SECItem *public2,
|
|
SECItem *private1,
|
|
SECItem *private2,
|
|
SECItem *derivedSecret)
|
|
{
|
|
mp_int p, Y, R, r, x, t, u, w;
|
|
mp_err err;
|
|
unsigned char *secret = NULL;
|
|
unsigned int len = 0, offset;
|
|
if (!prime || !public1 || !public2 || !private1 || !private2 ||
|
|
!derivedSecret) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
memset(derivedSecret, 0, sizeof *derivedSecret);
|
|
MP_DIGITS(&p) = 0;
|
|
MP_DIGITS(&Y) = 0;
|
|
MP_DIGITS(&R) = 0;
|
|
MP_DIGITS(&r) = 0;
|
|
MP_DIGITS(&x) = 0;
|
|
MP_DIGITS(&t) = 0;
|
|
MP_DIGITS(&u) = 0;
|
|
MP_DIGITS(&w) = 0;
|
|
CHECK_MPI_OK( mp_init(&p) );
|
|
CHECK_MPI_OK( mp_init(&Y) );
|
|
CHECK_MPI_OK( mp_init(&R) );
|
|
CHECK_MPI_OK( mp_init(&r) );
|
|
CHECK_MPI_OK( mp_init(&x) );
|
|
CHECK_MPI_OK( mp_init(&t) );
|
|
CHECK_MPI_OK( mp_init(&u) );
|
|
CHECK_MPI_OK( mp_init(&w) );
|
|
SECITEM_TO_MPINT(*prime, &p);
|
|
SECITEM_TO_MPINT(*public1, &Y);
|
|
SECITEM_TO_MPINT(*public2, &R);
|
|
SECITEM_TO_MPINT(*private1, &r);
|
|
SECITEM_TO_MPINT(*private2, &x);
|
|
/* t = DH(Y, r, p) = Y ** r mod p */
|
|
CHECK_MPI_OK( mp_exptmod(&Y, &r, &p, &t) );
|
|
/* u = DH(R, x, p) = R ** x mod p */
|
|
CHECK_MPI_OK( mp_exptmod(&R, &x, &p, &u) );
|
|
/* w = (t + u) mod p */
|
|
CHECK_MPI_OK( mp_addmod(&t, &u, &p, &w) );
|
|
/* allocate a buffer for the full derived secret */
|
|
len = mp_unsigned_octet_size(&w);
|
|
secret = PORT_Alloc(len);
|
|
/* grab the secret */
|
|
err = mp_to_unsigned_octets(&w, secret, len);
|
|
if (err > 0) err = MP_OKAY;
|
|
/* allocate output buffer */
|
|
SECITEM_AllocItem(NULL, derivedSecret, KEA_DERIVED_SECRET_LEN);
|
|
memset(derivedSecret->data, 0, derivedSecret->len);
|
|
/* copy in the 128 lsb of the secret */
|
|
if (len >= KEA_DERIVED_SECRET_LEN) {
|
|
memcpy(derivedSecret->data, secret + (len - KEA_DERIVED_SECRET_LEN),
|
|
KEA_DERIVED_SECRET_LEN);
|
|
} else {
|
|
offset = KEA_DERIVED_SECRET_LEN - len;
|
|
memcpy(derivedSecret->data + offset, secret, len);
|
|
}
|
|
cleanup:
|
|
mp_clear(&p);
|
|
mp_clear(&Y);
|
|
mp_clear(&R);
|
|
mp_clear(&r);
|
|
mp_clear(&x);
|
|
mp_clear(&t);
|
|
mp_clear(&u);
|
|
mp_clear(&w);
|
|
if (secret)
|
|
PORT_ZFree(secret, len);
|
|
if (err) {
|
|
MP_TO_SEC_ERROR(err);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
PRBool
|
|
KEA_Verify(SECItem *Y, SECItem *prime, SECItem *subPrime)
|
|
{
|
|
mp_int p, q, y, r;
|
|
mp_err err;
|
|
int cmp = 1; /* default is false */
|
|
if (!Y || !prime || !subPrime) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
MP_DIGITS(&p) = 0;
|
|
MP_DIGITS(&q) = 0;
|
|
MP_DIGITS(&y) = 0;
|
|
MP_DIGITS(&r) = 0;
|
|
CHECK_MPI_OK( mp_init(&p) );
|
|
CHECK_MPI_OK( mp_init(&q) );
|
|
CHECK_MPI_OK( mp_init(&y) );
|
|
CHECK_MPI_OK( mp_init(&r) );
|
|
SECITEM_TO_MPINT(*prime, &p);
|
|
SECITEM_TO_MPINT(*subPrime, &q);
|
|
SECITEM_TO_MPINT(*Y, &y);
|
|
/* compute r = y**q mod p */
|
|
CHECK_MPI_OK( mp_exptmod(&y, &q, &p, &r) );
|
|
/* compare to 1 */
|
|
cmp = mp_cmp_d(&r, 1);
|
|
cleanup:
|
|
mp_clear(&p);
|
|
mp_clear(&q);
|
|
mp_clear(&y);
|
|
mp_clear(&r);
|
|
if (err) {
|
|
MP_TO_SEC_ERROR(err);
|
|
return PR_FALSE;
|
|
}
|
|
return (cmp == 0) ? PR_TRUE : PR_FALSE;
|
|
}
|