/* * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ /* crypto/bn/bn_rand.c */ /* 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.] */ #include <stdio.h> #include <time.h> #include "cryptlib.h" #include "bn_lcl.h" #include <openssl/rand.h> static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom) { unsigned char *buf=NULL; int ret=0,bit,bytes,mask; #ifndef __APPLE__ time_t tim; #endif bytes=(bits+7)/8; bit=(bits-1)%8; mask=0xff<<bit; buf=(unsigned char *)Malloc(bytes); if (buf == NULL) { BNerr(BN_F_BN_RAND,ERR_R_MALLOC_FAILURE); goto err; } /* make a random number and set the top and bottom bits */ #ifndef __APPLE__ /* we really don't need to do this, we have a good RNG */ time(&tim); RAND_add(&tim,sizeof(tim),0); #endif /* __APPLE__ */ if (pseudorand) { if (RAND_pseudo_bytes(buf, bytes) == -1) goto err; } else { if (RAND_bytes(buf, bytes) <= 0) goto err; } if (top) { if (bit == 0) { buf[0]=1; buf[1]|=0x80; } else { buf[0]|=(3<<(bit-1)); buf[0]&= ~(mask<<1); } } else { buf[0]|=(1<<bit); buf[0]&= ~(mask<<1); } if (bottom) /* set bottom bits to whatever odd is */ buf[bytes-1]|=1; if (!BN_bin2bn(buf,bytes,rnd)) goto err; ret=1; err: if (buf != NULL) { memset(buf,0,bytes); Free(buf); } return(ret); } int BN_rand(BIGNUM *rnd, int bits, int top, int bottom) { return bnrand(0, rnd, bits, top, bottom); } int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom) { return bnrand(1, rnd, bits, top, bottom); }