1 /* $OpenBSD: dh_asn1.c,v 1.7 2015/02/10 05:12:23 jsing Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
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9 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
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16 * notice, this list of conditions and the following disclaimer in
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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/)"
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36 * "This product includes software developed by the OpenSSL Project
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51 * ====================================================================
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).
61 #include <openssl/asn1t.h>
62 #include <openssl/bn.h>
63 #include <openssl/dh.h>
64 #include <openssl/objects.h>
66 /* Override the default free and new methods */
68 dh_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
70 if (operation == ASN1_OP_NEW_PRE) {
71 *pval = (ASN1_VALUE *)DH_new();
75 } else if (operation == ASN1_OP_FREE_PRE) {
83 static const ASN1_AUX DHparams_aux = {
91 static const ASN1_TEMPLATE DHparams_seq_tt[] = {
95 .offset = offsetof(DH, p),
102 .offset = offsetof(DH, g),
107 .flags = ASN1_TFLG_OPTIONAL,
109 .offset = offsetof(DH, length),
110 .field_name = "length",
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,
127 d2i_DHparams(DH **a, const unsigned char **in, long len)
129 return (DH *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
134 i2d_DHparams(const DH *a, unsigned char **out)
136 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DHparams_it);
142 return ASN1_item_dup(ASN1_ITEM_rptr(DHparams), dh);