288 lines
11 KiB
C
288 lines
11 KiB
C
/**
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* \file dhm.h
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*
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* \brief Diffie-Hellman-Merkle key exchange
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_DHM_H
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#define POLARSSL_DHM_H
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#include "bignum.h"
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/*
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* DHM Error codes
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*/
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#define POLARSSL_ERR_DHM_BAD_INPUT_DATA -0x3080 /**< Bad input parameters to function. */
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#define POLARSSL_ERR_DHM_READ_PARAMS_FAILED -0x3100 /**< Reading of the DHM parameters failed. */
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#define POLARSSL_ERR_DHM_MAKE_PARAMS_FAILED -0x3180 /**< Making of the DHM parameters failed. */
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#define POLARSSL_ERR_DHM_READ_PUBLIC_FAILED -0x3200 /**< Reading of the public values failed. */
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#define POLARSSL_ERR_DHM_MAKE_PUBLIC_FAILED -0x3280 /**< Making of the public value failed. */
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#define POLARSSL_ERR_DHM_CALC_SECRET_FAILED -0x3300 /**< Calculation of the DHM secret failed. */
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#define POLARSSL_ERR_DHM_INVALID_FORMAT -0x3380 /**< The ASN.1 data is not formatted correctly. */
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#define POLARSSL_ERR_DHM_MALLOC_FAILED -0x3400 /**< Allocation of memory failed. */
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#define POLARSSL_ERR_DHM_FILE_IO_ERROR -0x3480 /**< Read/write of file failed. */
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/**
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* RFC 3526 defines a number of standardized Diffie-Hellman groups
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* for IKE.
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* RFC 5114 defines a number of standardized Diffie-Hellman groups
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* that can be used.
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*
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* Some are included here for convenience.
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*
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* Included are:
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* RFC 3526 3. 2048-bit MODP Group
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* RFC 3526 4. 3072-bit MODP Group
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* RFC 5114 2.1. 1024-bit MODP Group with 160-bit Prime Order Subgroup
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* RFC 5114 2.2. 2048-bit MODP Group with 224-bit Prime Order Subgroup
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*/
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#define POLARSSL_DHM_RFC3526_MODP_2048_P \
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"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" \
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"29024E088A67CC74020BBEA63B139B22514A08798E3404DD" \
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"EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" \
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"E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" \
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"EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D" \
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"C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" \
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"83655D23DCA3AD961C62F356208552BB9ED529077096966D" \
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"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" \
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"E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9" \
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"DE2BCBF6955817183995497CEA956AE515D2261898FA0510" \
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"15728E5A8AACAA68FFFFFFFFFFFFFFFF"
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#define POLARSSL_DHM_RFC3526_MODP_2048_G "02"
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#define POLARSSL_DHM_RFC3526_MODP_3072_P \
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"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" \
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"29024E088A67CC74020BBEA63B139B22514A08798E3404DD" \
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"EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" \
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"E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" \
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"EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D" \
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"C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" \
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"83655D23DCA3AD961C62F356208552BB9ED529077096966D" \
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"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" \
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"E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9" \
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"DE2BCBF6955817183995497CEA956AE515D2261898FA0510" \
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"15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64" \
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"ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7" \
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"ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B" \
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"F12FFA06D98A0864D87602733EC86A64521F2B18177B200C" \
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"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31" \
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"43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF"
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#define POLARSSL_DHM_RFC3526_MODP_3072_G "02"
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#define POLARSSL_DHM_RFC5114_MODP_1024_P \
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"B10B8F96A080E01DDE92DE5EAE5D54EC52C99FBCFB06A3C6" \
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"9A6A9DCA52D23B616073E28675A23D189838EF1E2EE652C0" \
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"13ECB4AEA906112324975C3CD49B83BFACCBDD7D90C4BD70" \
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"98488E9C219A73724EFFD6FAE5644738FAA31A4FF55BCCC0" \
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"A151AF5F0DC8B4BD45BF37DF365C1A65E68CFDA76D4DA708" \
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"DF1FB2BC2E4A4371"
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#define POLARSSL_DHM_RFC5114_MODP_1024_G \
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"A4D1CBD5C3FD34126765A442EFB99905F8104DD258AC507F" \
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"D6406CFF14266D31266FEA1E5C41564B777E690F5504F213" \
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"160217B4B01B886A5E91547F9E2749F4D7FBD7D3B9A92EE1" \
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"909D0D2263F80A76A6A24C087A091F531DBF0A0169B6A28A" \
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"D662A4D18E73AFA32D779D5918D08BC8858F4DCEF97C2A24" \
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"855E6EEB22B3B2E5"
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#define POLARSSL_DHM_RFC5114_MODP_2048_P \
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"AD107E1E9123A9D0D660FAA79559C51FA20D64E5683B9FD1" \
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"B54B1597B61D0A75E6FA141DF95A56DBAF9A3C407BA1DF15" \
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"EB3D688A309C180E1DE6B85A1274A0A66D3F8152AD6AC212" \
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"9037C9EDEFDA4DF8D91E8FEF55B7394B7AD5B7D0B6C12207" \
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"C9F98D11ED34DBF6C6BA0B2C8BBC27BE6A00E0A0B9C49708" \
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"B3BF8A317091883681286130BC8985DB1602E714415D9330" \
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"278273C7DE31EFDC7310F7121FD5A07415987D9ADC0A486D" \
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"CDF93ACC44328387315D75E198C641A480CD86A1B9E587E8" \
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"BE60E69CC928B2B9C52172E413042E9B23F10B0E16E79763" \
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"C9B53DCF4BA80A29E3FB73C16B8E75B97EF363E2FFA31F71" \
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"CF9DE5384E71B81C0AC4DFFE0C10E64F"
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#define POLARSSL_DHM_RFC5114_MODP_2048_G \
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"AC4032EF4F2D9AE39DF30B5C8FFDAC506CDEBE7B89998CAF"\
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"74866A08CFE4FFE3A6824A4E10B9A6F0DD921F01A70C4AFA"\
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"AB739D7700C29F52C57DB17C620A8652BE5E9001A8D66AD7"\
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"C17669101999024AF4D027275AC1348BB8A762D0521BC98A"\
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"E247150422EA1ED409939D54DA7460CDB5F6C6B250717CBE"\
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"F180EB34118E98D119529A45D6F834566E3025E316A330EF"\
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"BB77A86F0C1AB15B051AE3D428C8F8ACB70A8137150B8EEB"\
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"10E183EDD19963DDD9E263E4770589EF6AA21E7F5F2FF381"\
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"B539CCE3409D13CD566AFBB48D6C019181E1BCFE94B30269"\
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"EDFE72FE9B6AA4BD7B5A0F1C71CFFF4C19C418E1F6EC0179"\
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"81BC087F2A7065B384B890D3191F2BFA"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief DHM context structure
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*/
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typedef struct
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{
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size_t len; /*!< size(P) in chars */
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mpi P; /*!< prime modulus */
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mpi G; /*!< generator */
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mpi X; /*!< secret value */
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mpi GX; /*!< self = G^X mod P */
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mpi GY; /*!< peer = G^Y mod P */
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mpi K; /*!< key = GY^X mod P */
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mpi RP; /*!< cached R^2 mod P */
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mpi Vi; /*!< blinding value */
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mpi Vf; /*!< un-blinding value */
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mpi pX; /*!< previous X */
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}
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dhm_context;
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/**
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* \brief Parse the ServerKeyExchange parameters
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*
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* \param ctx DHM context
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* \param p &(start of input buffer)
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* \param end end of buffer
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*
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* \return 0 if successful, or an POLARSSL_ERR_DHM_XXX error code
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*/
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int dhm_read_params( dhm_context *ctx,
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unsigned char **p,
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const unsigned char *end );
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/**
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* \brief Setup and write the ServerKeyExchange parameters
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*
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* \param ctx DHM context
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* \param x_size private value size in bytes
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* \param output destination buffer
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* \param olen number of chars written
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* \param f_rng RNG function
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* \param p_rng RNG parameter
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*
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* \note This function assumes that ctx->P and ctx->G
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* have already been properly set (for example
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* using mpi_read_string or mpi_read_binary).
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*
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* \return 0 if successful, or an POLARSSL_ERR_DHM_XXX error code
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*/
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int dhm_make_params( dhm_context *ctx, int x_size,
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unsigned char *output, size_t *olen,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng );
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/**
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* \brief Import the peer's public value G^Y
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*
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* \param ctx DHM context
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* \param input input buffer
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* \param ilen size of buffer
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*
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* \return 0 if successful, or an POLARSSL_ERR_DHM_XXX error code
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*/
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int dhm_read_public( dhm_context *ctx,
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const unsigned char *input, size_t ilen );
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/**
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* \brief Create own private value X and export G^X
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*
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* \param ctx DHM context
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* \param x_size private value size in bytes
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* \param output destination buffer
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* \param olen must be equal to ctx->P.len
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* \param f_rng RNG function
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* \param p_rng RNG parameter
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*
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* \return 0 if successful, or an POLARSSL_ERR_DHM_XXX error code
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*/
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int dhm_make_public( dhm_context *ctx, int x_size,
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unsigned char *output, size_t olen,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng );
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/**
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* \brief Derive and export the shared secret (G^Y)^X mod P
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*
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* \param ctx DHM context
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* \param output destination buffer
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* \param olen number of chars written
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* \param f_rng RNG function, for blinding purposes
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* \param p_rng RNG parameter
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*
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* \return 0 if successful, or an POLARSSL_ERR_DHM_XXX error code
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*
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* \note If non-NULL, f_rng is used to blind the input as
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* countermeasure against timing attacks. Blinding is
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* automatically used if and only if our secret value X is
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* re-used and costs nothing otherwise, so it is recommended
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* to always pass a non-NULL f_rng argument.
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*/
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int dhm_calc_secret( dhm_context *ctx,
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unsigned char *output, size_t *olen,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng );
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/**
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* \brief Free the components of a DHM key
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*/
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void dhm_free( dhm_context *ctx );
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#if defined(POLARSSL_ASN1_PARSE_C)
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/** \ingroup x509_module */
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/**
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* \brief Parse DHM parameters
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*
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* \param dhm DHM context to be initialized
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* \param dhmin input buffer
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* \param dhminlen size of the buffer
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*
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* \return 0 if successful, or a specific DHM or PEM error code
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*/
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int dhm_parse_dhm( dhm_context *dhm, const unsigned char *dhmin,
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size_t dhminlen );
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#if defined(POLARSSL_FS_IO)
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/** \ingroup x509_module */
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/**
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* \brief Load and parse DHM parameters
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*
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* \param dhm DHM context to be initialized
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* \param path filename to read the DHM Parameters from
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*
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* \return 0 if successful, or a specific DHM or PEM error code
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*/
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int dhm_parse_dhmfile( dhm_context *dhm, const char *path );
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#endif /* POLARSSL_FS_IO */
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#endif /* POLARSSL_ASN1_PARSE_C */
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int dhm_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* dhm.h */
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