/* crypto/asn1/d2i_dhp.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.] */ #ifndef NO_DH #include <stdio.h> #include "cryptlib.h" #include <openssl/bn.h> #include <openssl/dh.h> #include <openssl/objects.h> #include <openssl/asn1_mac.h> DH *d2i_DHparams(DH **a, unsigned char **pp, long length) { int i=ERR_R_NESTED_ASN1_ERROR; ASN1_INTEGER *bs=NULL; long v=0; M_ASN1_D2I_vars(a,DH *,DH_new); M_ASN1_D2I_Init(); M_ASN1_D2I_start_sequence(); M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); if ((ret->p=BN_bin2bn(bs->data,bs->length,ret->p)) == NULL) goto err_bn; M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); if ((ret->g=BN_bin2bn(bs->data,bs->length,ret->g)) == NULL) goto err_bn; if (!M_ASN1_D2I_end_sequence()) { M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); for (i=0; i<bs->length; i++) v=(v<<8)|(bs->data[i]); ret->length=(int)v; } M_ASN1_BIT_STRING_free(bs); bs = NULL; M_ASN1_D2I_Finish_2(a); err_bn: i=ERR_R_BN_LIB; err: ASN1err(ASN1_F_D2I_DHPARAMS,i); if ((ret != NULL) && ((a == NULL) || (*a != ret))) DH_free(ret); if (bs != NULL) M_ASN1_BIT_STRING_free(bs); return(NULL); } #endif