| 1 |  |  | /* $OpenBSD: dh_asn1.c,v 1.8 2015/02/14 15:06:55 jsing Exp $ */ | 
    
    | 2 |  |  | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | 
    
    | 3 |  |  |  * project 2000. | 
    
    | 4 |  |  |  */ | 
    
    | 5 |  |  | /* ==================================================================== | 
    
    | 6 |  |  |  * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved. | 
    
    | 7 |  |  |  * | 
    
    | 8 |  |  |  * Redistribution and use in source and binary forms, with or without | 
    
    | 9 |  |  |  * modification, are permitted provided that the following conditions | 
    
    | 10 |  |  |  * are met: | 
    
    | 11 |  |  |  * | 
    
    | 12 |  |  |  * 1. Redistributions of source code must retain the above copyright | 
    
    | 13 |  |  |  *    notice, this list of conditions and the following disclaimer. | 
    
    | 14 |  |  |  * | 
    
    | 15 |  |  |  * 2. Redistributions in binary form must reproduce the above copyright | 
    
    | 16 |  |  |  *    notice, this list of conditions and the following disclaimer in | 
    
    | 17 |  |  |  *    the documentation and/or other materials provided with the | 
    
    | 18 |  |  |  *    distribution. | 
    
    | 19 |  |  |  * | 
    
    | 20 |  |  |  * 3. All advertising materials mentioning features or use of this | 
    
    | 21 |  |  |  *    software must display the following acknowledgment: | 
    
    | 22 |  |  |  *    "This product includes software developed by the OpenSSL Project | 
    
    | 23 |  |  |  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | 
    
    | 24 |  |  |  * | 
    
    | 25 |  |  |  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | 
    
    | 26 |  |  |  *    endorse or promote products derived from this software without | 
    
    | 27 |  |  |  *    prior written permission. For written permission, please contact | 
    
    | 28 |  |  |  *    licensing@OpenSSL.org. | 
    
    | 29 |  |  |  * | 
    
    | 30 |  |  |  * 5. Products derived from this software may not be called "OpenSSL" | 
    
    | 31 |  |  |  *    nor may "OpenSSL" appear in their names without prior written | 
    
    | 32 |  |  |  *    permission of the OpenSSL Project. | 
    
    | 33 |  |  |  * | 
    
    | 34 |  |  |  * 6. Redistributions of any form whatsoever must retain the following | 
    
    | 35 |  |  |  *    acknowledgment: | 
    
    | 36 |  |  |  *    "This product includes software developed by the OpenSSL Project | 
    
    | 37 |  |  |  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | 
    
    | 38 |  |  |  * | 
    
    | 39 |  |  |  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | 
    
    | 40 |  |  |  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 
    
    | 41 |  |  |  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 
    
    | 42 |  |  |  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR | 
    
    | 43 |  |  |  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 
    
    | 44 |  |  |  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | 
    
    | 45 |  |  |  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 
    
    | 46 |  |  |  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | 
    
    | 47 |  |  |  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | 
    
    | 48 |  |  |  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 
    
    | 49 |  |  |  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | 
    
    | 50 |  |  |  * OF THE POSSIBILITY OF SUCH DAMAGE. | 
    
    | 51 |  |  |  * ==================================================================== | 
    
    | 52 |  |  |  * | 
    
    | 53 |  |  |  * This product includes cryptographic software written by Eric Young | 
    
    | 54 |  |  |  * (eay@cryptsoft.com).  This product includes software written by Tim | 
    
    | 55 |  |  |  * Hudson (tjh@cryptsoft.com). | 
    
    | 56 |  |  |  * | 
    
    | 57 |  |  |  */ | 
    
    | 58 |  |  |  | 
    
    | 59 |  |  | #include <stdio.h> | 
    
    | 60 |  |  |  | 
    
    | 61 |  |  | #include <openssl/asn1t.h> | 
    
    | 62 |  |  | #include <openssl/bn.h> | 
    
    | 63 |  |  | #include <openssl/dh.h> | 
    
    | 64 |  |  | #include <openssl/objects.h> | 
    
    | 65 |  |  |  | 
    
    | 66 |  |  | /* Override the default free and new methods */ | 
    
    | 67 |  |  | static int | 
    
    | 68 |  |  | dh_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) | 
    
    | 69 |  |  | { | 
    
    | 70 |  |  | 	if (operation == ASN1_OP_NEW_PRE) { | 
    
    | 71 |  |  | 		*pval = (ASN1_VALUE *)DH_new(); | 
    
    | 72 |  |  | 		if (*pval) | 
    
    | 73 |  |  | 			return 2; | 
    
    | 74 |  |  | 		return 0; | 
    
    | 75 |  |  | 	} else if (operation == ASN1_OP_FREE_PRE) { | 
    
    | 76 |  |  | 		DH_free((DH *)*pval); | 
    
    | 77 |  |  | 		*pval = NULL; | 
    
    | 78 |  |  | 		return 2; | 
    
    | 79 |  |  | 	} | 
    
    | 80 |  |  | 	return 1; | 
    
    | 81 |  |  | } | 
    
    | 82 |  |  |  | 
    
    | 83 |  |  | static const ASN1_AUX DHparams_aux = { | 
    
    | 84 |  |  | 	.app_data = NULL, | 
    
    | 85 |  |  | 	.flags = 0, | 
    
    | 86 |  |  | 	.ref_offset = 0, | 
    
    | 87 |  |  | 	.ref_lock = 0, | 
    
    | 88 |  |  | 	.asn1_cb = dh_cb, | 
    
    | 89 |  |  | 	.enc_offset = 0, | 
    
    | 90 |  |  | }; | 
    
    | 91 |  |  | static const ASN1_TEMPLATE DHparams_seq_tt[] = { | 
    
    | 92 |  |  | 	{ | 
    
    | 93 |  |  | 		.flags = 0, | 
    
    | 94 |  |  | 		.tag = 0, | 
    
    | 95 |  |  | 		.offset = offsetof(DH, p), | 
    
    | 96 |  |  | 		.field_name = "p", | 
    
    | 97 |  |  | 		.item = &BIGNUM_it, | 
    
    | 98 |  |  | 	}, | 
    
    | 99 |  |  | 	{ | 
    
    | 100 |  |  | 		.flags = 0, | 
    
    | 101 |  |  | 		.tag = 0, | 
    
    | 102 |  |  | 		.offset = offsetof(DH, g), | 
    
    | 103 |  |  | 		.field_name = "g", | 
    
    | 104 |  |  | 		.item = &BIGNUM_it, | 
    
    | 105 |  |  | 	}, | 
    
    | 106 |  |  | 	{ | 
    
    | 107 |  |  | 		.flags = ASN1_TFLG_OPTIONAL, | 
    
    | 108 |  |  | 		.tag = 0, | 
    
    | 109 |  |  | 		.offset = offsetof(DH, length), | 
    
    | 110 |  |  | 		.field_name = "length", | 
    
    | 111 |  |  | 		.item = &ZLONG_it, | 
    
    | 112 |  |  | 	}, | 
    
    | 113 |  |  | }; | 
    
    | 114 |  |  |  | 
    
    | 115 |  |  | const ASN1_ITEM DHparams_it = { | 
    
    | 116 |  |  | 	.itype = ASN1_ITYPE_SEQUENCE, | 
    
    | 117 |  |  | 	.utype = V_ASN1_SEQUENCE, | 
    
    | 118 |  |  | 	.templates = DHparams_seq_tt, | 
    
    | 119 |  |  | 	.tcount = sizeof(DHparams_seq_tt) / sizeof(ASN1_TEMPLATE), | 
    
    | 120 |  |  | 	.funcs = &DHparams_aux, | 
    
    | 121 |  |  | 	.size = sizeof(DH), | 
    
    | 122 |  |  | 	.sname = "DH", | 
    
    | 123 |  |  | }; | 
    
    | 124 |  |  |  | 
    
    | 125 |  |  |  | 
    
    | 126 |  |  | DH * | 
    
    | 127 |  |  | d2i_DHparams(DH **a, const unsigned char **in, long len) | 
    
    | 128 |  |  | { | 
    
    | 129 |  |  | 	return (DH *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, | 
    
    | 130 |  |  | 	    &DHparams_it); | 
    
    | 131 |  |  | } | 
    
    | 132 |  |  |  | 
    
    | 133 |  |  | int | 
    
    | 134 |  |  | i2d_DHparams(const DH *a, unsigned char **out) | 
    
    | 135 |  |  | { | 
    
    | 136 |  |  | 	return ASN1_item_i2d((ASN1_VALUE *)a, out, &DHparams_it); | 
    
    | 137 |  |  | } | 
    
    | 138 |  |  |  | 
    
    | 139 |  |  | DH * | 
    
    | 140 |  |  | DHparams_dup(DH *dh) | 
    
    | 141 |  |  | { | 
    
    | 142 |  |  | 	return ASN1_item_dup(ASN1_ITEM_rptr(DHparams), dh); | 
    
    | 143 |  |  | } |