From 58964a492275ca9a59a0cd9c8155cb2491b4b909 Mon Sep 17 00:00:00 2001 From: "Ralf S. Engelschall" Date: Mon, 21 Dec 1998 10:56:39 +0000 Subject: Import of old SSLeay release: SSLeay 0.9.0b --- crypto/bn/bn_mpi.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 crypto/bn/bn_mpi.c (limited to 'crypto/bn/bn_mpi.c') diff --git a/crypto/bn/bn_mpi.c b/crypto/bn/bn_mpi.c new file mode 100644 index 0000000000..53945c1057 --- /dev/null +++ b/crypto/bn/bn_mpi.c @@ -0,0 +1,134 @@ +/* crypto/bn/bn_mpi.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 +#include "cryptlib.h" +#include "bn_lcl.h" + +int BN_bn2mpi(a,d) +BIGNUM *a; +unsigned char *d; + { + int bits; + int num=0; + int ext=0; + long l; + + bits=BN_num_bits(a); + num=(bits+7)/8; + if (bits > 0) + { + ext=((bits & 0x07) == 0); + } + if (d == NULL) + return(num+4+ext); + + l=num+ext; + d[0]=(unsigned char)(l>>24)&0xff; + d[1]=(unsigned char)(l>>16)&0xff; + d[2]=(unsigned char)(l>> 8)&0xff; + d[3]=(unsigned char)(l )&0xff; + if (ext) d[4]=0; + num=BN_bn2bin(a,&(d[4+ext])); + if (a->neg) + d[4]|=0x80; + return(num+4+ext); + } + +BIGNUM *BN_mpi2bn(d,n,a) +unsigned char *d; +int n; +BIGNUM *a; + { + long len; + int neg=0; + + if (n < 4) + { + BNerr(BN_F_BN_MPI2BN,BN_R_INVALID_LENGTH); + return(NULL); + } + len=(d[0]<<24)|(d[1]<<16)|(d[2]<<8)|d[3]; + if ((len+4) != n) + { + BNerr(BN_F_BN_MPI2BN,BN_R_ENCODING_ERROR); + return(NULL); + } + + if (a == NULL) a=BN_new(); + if (a == NULL) return(NULL); + + if (len == 0) + { + a->neg=0; + a->top=0; + return(a); + } + d+=4; + if ((*d) & 0x80) + neg=1; + if (BN_bin2bn(d,(int)len,a) == NULL) + return(NULL); + a->neg=neg; + if (neg) + { + BN_clear_bit(a,BN_num_bits(a)-1); + } + return(a); + } + -- cgit v1.2.3