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Remove optimisation for known DH groups.

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Since we are eliminating DHE support in TLS, this is just a waste of
bytes.

Change-Id: I3a23ece564e43f7e8874d1ec797def132ba59504
Reviewed-on: https://boringssl-review.googlesource.com/10260
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
This commit is contained in:
Adam Langley 2016-08-10 15:19:43 -07:00 committed by CQ bot account: commit-bot@chromium.org
parent 881f196075
commit 37b486aade
8 changed files with 0 additions and 171 deletions
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2
crypto/dh/check.c
View File

@ -58,8 +58,6 @@
#include <openssl/bn.h>
#include "internal.h"
int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) {
*ret = 0;

2
crypto/dh/dh.c
View File

@ -65,7 +65,6 @@
#include <openssl/mem.h>
#include <openssl/thread.h>
#include "internal.h"
#include "../internal.h"
@ -303,7 +302,6 @@ int DH_generate_key(DH *dh) {
}
} else {
/* secret exponent length */
DH_check_standard_parameters(dh);
l = dh->priv_length ? dh->priv_length : BN_num_bits(dh->p) - 1;
if (!BN_rand(priv_key, l, 0, 0)) {
goto err;

1
crypto/dh/dh_test.cc
View File

@ -67,7 +67,6 @@
#include <openssl/err.h>
#include <openssl/mem.h>
#include "internal.h"
#include "../test/scoped_types.h"
namespace bssl {

80
crypto/dh/internal.h
View File

@ -1,80 +0,0 @@
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#ifndef OPENSSL_HEADER_DH_INTERNAL_H
#define OPENSSL_HEADER_DH_INTERNAL_H
#include <openssl/base.h>
#include <openssl/bn.h>
#include <openssl/ex_data.h>
#if defined(__cplusplus)
extern "C" {
#endif
/* DH_check_standard_parameters checks if the parameters in |dh| are well
* known and safe. If so, it sets |dh->priv_length| to an appropriately smaller
* value than the default. */
void DH_check_standard_parameters(DH *dh);
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_DH_INTERNAL_H */

83
crypto/dh/params.c
View File

@ -54,7 +54,6 @@
#include <openssl/bn.h>
#include "internal.h"
#include "../bn/internal.h"
@ -166,58 +165,6 @@ static const BN_ULONG dh2048_256_q[] = {
TOBN(0xB4479976, 0x40129DA2), TOBN(0x8CF83642, 0xA709A097),
};
/* dh1024_safe_prime_1 is hard-coded in Apache httpd 2.2,
* modules/ssl/ssl_engine_dh.c. */
static const BN_ULONG dh1024_safe_prime_1[] = {
TOBN(0xE7393E0F, 0x24218EB3), TOBN(0x7DE0F4D6, 0xE2BD68B0),
TOBN(0x07DD62DB, 0x88AEAA74), TOBN(0x10EA9FCC, 0x9DDD3305),
TOBN(0xA7DBCA78, 0x74087D15), TOBN(0xDAE88600, 0x78045B07),
TOBN(0x33168A46, 0x1AAD3B72), TOBN(0xFF590137, 0x7BEDDCFD),
TOBN(0xFE324A46, 0x7A635E81), TOBN(0x5AC179BA, 0x420B2A29),
TOBN(0x13B4B4D7, 0x177E16D5), TOBN(0x849F912E, 0x639C72FB),
TOBN(0xB88174CB, 0x98BCE951), TOBN(0x0C84D239, 0xA45F520B),
TOBN(0x36D693D3, 0x4AFD0AD5), TOBN(0xD67DE440, 0xCBBBDC19),
};
/* dh1024_safe_prime_2 is hard-coded in nginx,
* src/event/ngx_event_openssl.c. */
static const BN_ULONG dh1024_safe_prime_2[] = {
TOBN(0x071DF045, 0xCFE16B9B), TOBN(0x88D0F65D, 0x146757DA),
TOBN(0x4A63AB1E, 0x58FAFD49), TOBN(0x35D8CECE, 0xEF9EA027),
TOBN(0x25ECE662, 0x70CC9A50), TOBN(0xF29BA5DF, 0x81DC2CA7),
TOBN(0x8F68B076, 0xF7D36CC8), TOBN(0x60E91A92, 0xA757E304),
TOBN(0x87A2BC04, 0x9BE67780), TOBN(0xBEECA565, 0xA5FDF1D2),
TOBN(0x5CCBBAA8, 0x922614C5), TOBN(0x6C030276, 0xE710800C),
TOBN(0x08EED4EB, 0x0FB3504C), TOBN(0xD958A3F5, 0x68B42D4B),
TOBN(0x7C43FCF5, 0x80E9CFDB), TOBN(0xBBBC2DCA, 0xD8467490),
};
/* dh1024_safe_prime_3 is offered as a parameter by several high-traffic sites,
* including mozilla.org, as of Jan 2015. */
static const BN_ULONG dh1024_safe_prime_3[] = {
TOBN(0x671746AE, 0x349E721B), TOBN(0x258A0655, 0xD75E93B2),
TOBN(0xD425E6FB, 0x25592EB6), TOBN(0x0C46AB04, 0xBF7CDD9A),
TOBN(0x0AD0BC99, 0x28968680), TOBN(0xF53907FB, 0xD0B7EB49),
TOBN(0x202EABB3, 0xEBC85C1D), TOBN(0x3129C693, 0x364D8C71),
TOBN(0x53728351, 0x2D46F195), TOBN(0xDF326DD6, 0x8C76CC85),
TOBN(0xF898B3F9, 0x9188E24E), TOBN(0x95EFB13C, 0x2855DFD2),
TOBN(0x1F5DAC48, 0x7B2241FE), TOBN(0x117B6BF7, 0x99A13D9F),
TOBN(0x0F97CDDA, 0x3A3468C7), TOBN(0xC9BBF5F7, 0x74A8297B)};
/* dh1024_safe_prime_4 is hard-coded in Apache httpd 2.0,
* modules/ssl/ssl_engine_dh.c. */
static const BN_ULONG dh1024_safe_prime_4[] = {
TOBN(0x5085E21F, 0x0DD5C86B), TOBN(0x871538DF, 0xD823C650),
TOBN(0x125136F7, 0x262E56A8), TOBN(0x974E9EF1, 0x839EB5DB),
TOBN(0xEA9BAD99, 0x1B13A63C), TOBN(0x6044CF02, 0x3D76E05E),
TOBN(0x611EBBBE, 0x1BAC9B5C), TOBN(0x3E371D79, 0x4E5327DF),
TOBN(0x000E6EDD, 0x061CBC05), TOBN(0x2F971F3C, 0x20129B48),
TOBN(0xA6EF09C4, 0x3048D5A2), TOBN(0xFA15A259, 0xCBD523A6),
TOBN(0x2A206490, 0x4A79A770), TOBN(0x91B78182, 0x51BB055E),
TOBN(0x7CF180C3, 0xBDD4798E), TOBN(0xE6969D3D, 0x495BE32C)};
static const BN_ULONG bn_two_data[] = {2};
struct standard_parameters {
BIGNUM p, q, g;
};
@ -240,15 +187,6 @@ static const struct standard_parameters dh2048_256 = {
STATIC_BIGNUM(dh2048_256_g),
};
static const BIGNUM dh1024_safe_prime[] = {
STATIC_BIGNUM(dh1024_safe_prime_1),
STATIC_BIGNUM(dh1024_safe_prime_2),
STATIC_BIGNUM(dh1024_safe_prime_3),
STATIC_BIGNUM(dh1024_safe_prime_4)
};
static const BIGNUM bn_two = STATIC_BIGNUM(bn_two_data);
static DH *get_standard_parameters(const struct standard_parameters *params,
const ENGINE *engine) {
DH *dh = DH_new();
@ -313,24 +251,3 @@ BIGNUM *BN_get_rfc3526_prime_1536(BIGNUM *ret) {
return ret;
}
void DH_check_standard_parameters(DH *dh) {
unsigned i;
if (dh->p == NULL ||
dh->g == NULL ||
BN_num_bytes(dh->p) != (1024 / 8) ||
BN_cmp(dh->g, &bn_two) != 0) {
return;
}
for (i = 0; i < sizeof(dh1024_safe_prime) / sizeof(dh1024_safe_prime[0]);
i++) {
if (BN_cmp(dh->p, &dh1024_safe_prime[i]) == 0) {
/* The well-known DH groups are known to have safe primes. In this case
* we can safely reduce the size of the private key. */
dh->priv_length = 161;
break;
}
}
}

1
ssl/handshake_client.c
View File

@ -167,7 +167,6 @@
#include <openssl/x509v3.h>
#include "internal.h"
#include "../crypto/dh/internal.h"
static int ssl3_send_client_hello(SSL *ssl);

1
ssl/handshake_server.c
View File

@ -169,7 +169,6 @@
#include "internal.h"
#include "../crypto/internal.h"
#include "../crypto/dh/internal.h"
static int ssl3_get_client_hello(SSL *ssl);

1
ssl/ssl_cert.c
View File

@ -127,7 +127,6 @@
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "../crypto/dh/internal.h"
#include "../crypto/internal.h"
#include "internal.h"