1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/dsa/dsa_key.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This package is an SSL implementation written 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * by Eric Young (eay@cryptsoft.com). 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The implementation was written so as to conform with Netscapes SSL. 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This library is free for commercial and non-commercial use as long as 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the following conditions are aheared to. The following conditions 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * apply to all code found in this distribution, be it the RC4, RSA, 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * included with this distribution is covered by the same copyright terms 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright remains Eric Young's, and as such any Copyright notices in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the code are not to be removed. 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If this package is used in a product, Eric Young should be given attribution 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the author of the parts of the library used. 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This can be in the form of a textual message at program startup or 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * in documentation (online or textual) provided with the package. 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the copyright 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in the 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * documentation and/or other materials provided with the distribution. 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this software 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * must display the following acknowledgement: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes cryptographic software written by 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Eric Young (eay@cryptsoft.com)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The word 'cryptographic' can be left out if the rouines from the library 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * being used are not cryptographic related :-). 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. If you include any Windows specific code (or a derivative thereof) from 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the apps directory (application code) you must include an acknowledgement: 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SUCH DAMAGE. 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The licence and distribution terms for any publically available version or 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * derivative of this code cannot be changed. i.e. this code cannot simply be 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * copied and put under another distribution licence 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * [including the GNU Public Licence.] 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <time.h> 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "cryptlib.h" 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef OPENSSL_NO_SHA 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/bn.h> 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/dsa.h> 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/rand.h> 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 67392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifdef OPENSSL_FIPS 68392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#include <openssl/fips.h> 69392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 70392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int dsa_builtin_keygen(DSA *dsa); 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint DSA_generate_key(DSA *dsa) 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 75392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifdef OPENSSL_FIPS 76392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD) 77392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) 78392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 79392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom DSAerr(DSA_F_DSA_GENERATE_KEY, DSA_R_NON_FIPS_DSA_METHOD); 80392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom return 0; 81392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 82392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(dsa->meth->dsa_keygen) 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return dsa->meth->dsa_keygen(dsa); 85392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifdef OPENSSL_FIPS 86392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (FIPS_mode()) 87392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom return FIPS_dsa_generate_key(dsa); 88392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return dsa_builtin_keygen(dsa); 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int dsa_builtin_keygen(DSA *dsa) 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int ok=0; 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_CTX *ctx=NULL; 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM *pub_key=NULL,*priv_key=NULL; 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((ctx=BN_CTX_new()) == NULL) goto err; 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dsa->priv_key == NULL) 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((priv_key=BN_new()) == NULL) goto err; 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project priv_key=dsa->priv_key; 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project do 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_rand_range(priv_key,dsa->q)) goto err; 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while (BN_is_zero(priv_key)); 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dsa->pub_key == NULL) 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((pub_key=BN_new()) == NULL) goto err; 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pub_key=dsa->pub_key; 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM local_prk; 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIGNUM *prk; 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_init(&local_prk); 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project prk = &local_prk; 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME); 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project prk = priv_key; 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!BN_mod_exp(pub_key,dsa->g,prk,dsa->p,ctx)) goto err; 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dsa->priv_key=priv_key; 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dsa->pub_key=pub_key; 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ok=1; 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((pub_key != NULL) && (dsa->pub_key == NULL)) BN_free(pub_key); 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((priv_key != NULL) && (dsa->priv_key == NULL)) BN_free(priv_key); 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ctx != NULL) BN_CTX_free(ctx); 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ok); 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 145