[331] | 1 | /*
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| 2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stddef.h>
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| 11 | #include <openssl/asn1.h>
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| 12 | #include <openssl/objects.h>
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| 13 | #include <openssl/err.h>
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| 14 | #include <openssl/asn1t.h>
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| 15 | #include <string.h>
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| 16 | #include "asn1_locl.h"
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| 17 |
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| 18 | static int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 19 | int embed);
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| 20 | static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 21 | int embed);
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| 22 | static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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| 23 | static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
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| 24 | static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
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| 25 | static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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| 26 |
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| 27 | ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
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| 28 | {
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| 29 | ASN1_VALUE *ret = NULL;
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| 30 | if (ASN1_item_ex_new(&ret, it) > 0)
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| 31 | return ret;
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| 32 | return NULL;
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| 33 | }
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| 34 |
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| 35 | /* Allocate an ASN1 structure */
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| 36 |
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| 37 | int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
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| 38 | {
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| 39 | return asn1_item_embed_new(pval, it, 0);
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| 40 | }
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| 41 |
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| 42 | int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
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| 43 | {
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| 44 | const ASN1_TEMPLATE *tt = NULL;
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| 45 | const ASN1_EXTERN_FUNCS *ef;
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| 46 | const ASN1_AUX *aux = it->funcs;
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| 47 | ASN1_aux_cb *asn1_cb;
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| 48 | ASN1_VALUE **pseqval;
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| 49 | int i;
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| 50 | if (aux && aux->asn1_cb)
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| 51 | asn1_cb = aux->asn1_cb;
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| 52 | else
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| 53 | asn1_cb = 0;
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| 54 |
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| 55 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 56 | OPENSSL_mem_debug_push(it->sname ? it->sname : "asn1_item_embed_new");
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| 57 | #endif
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| 58 |
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| 59 | switch (it->itype) {
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| 60 |
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| 61 | case ASN1_ITYPE_EXTERN:
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| 62 | ef = it->funcs;
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| 63 | if (ef && ef->asn1_ex_new) {
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| 64 | if (!ef->asn1_ex_new(pval, it))
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| 65 | goto memerr;
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| 66 | }
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| 67 | break;
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| 68 |
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| 69 | case ASN1_ITYPE_PRIMITIVE:
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| 70 | if (it->templates) {
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| 71 | if (!asn1_template_new(pval, it->templates))
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| 72 | goto memerr;
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| 73 | } else if (!asn1_primitive_new(pval, it, embed))
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| 74 | goto memerr;
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| 75 | break;
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| 76 |
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| 77 | case ASN1_ITYPE_MSTRING:
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| 78 | if (!asn1_primitive_new(pval, it, embed))
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| 79 | goto memerr;
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| 80 | break;
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| 81 |
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| 82 | case ASN1_ITYPE_CHOICE:
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| 83 | if (asn1_cb) {
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| 84 | i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
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| 85 | if (!i)
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| 86 | goto auxerr;
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| 87 | if (i == 2) {
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| 88 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 89 | OPENSSL_mem_debug_pop();
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| 90 | #endif
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| 91 | return 1;
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| 92 | }
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| 93 | }
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| 94 | if (embed) {
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| 95 | memset(*pval, 0, it->size);
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| 96 | } else {
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| 97 | *pval = OPENSSL_zalloc(it->size);
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| 98 | if (*pval == NULL)
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| 99 | goto memerr;
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| 100 | }
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| 101 | asn1_set_choice_selector(pval, -1, it);
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| 102 | if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
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| 103 | goto auxerr2;
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| 104 | break;
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| 105 |
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| 106 | case ASN1_ITYPE_NDEF_SEQUENCE:
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| 107 | case ASN1_ITYPE_SEQUENCE:
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| 108 | if (asn1_cb) {
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| 109 | i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
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| 110 | if (!i)
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| 111 | goto auxerr;
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| 112 | if (i == 2) {
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| 113 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 114 | OPENSSL_mem_debug_pop();
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| 115 | #endif
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| 116 | return 1;
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| 117 | }
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| 118 | }
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| 119 | if (embed) {
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| 120 | memset(*pval, 0, it->size);
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| 121 | } else {
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| 122 | *pval = OPENSSL_zalloc(it->size);
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| 123 | if (*pval == NULL)
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| 124 | goto memerr;
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| 125 | }
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| 126 | /* 0 : init. lock */
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| 127 | if (asn1_do_lock(pval, 0, it) < 0)
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| 128 | goto memerr2;
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| 129 | asn1_enc_init(pval, it);
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| 130 | for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
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| 131 | pseqval = asn1_get_field_ptr(pval, tt);
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| 132 | if (!asn1_template_new(pseqval, tt))
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| 133 | goto memerr2;
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| 134 | }
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| 135 | if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
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| 136 | goto auxerr2;
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| 137 | break;
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| 138 | }
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| 139 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 140 | OPENSSL_mem_debug_pop();
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| 141 | #endif
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| 142 | return 1;
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| 143 |
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| 144 | memerr2:
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| 145 | ASN1_item_ex_free(pval, it);
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| 146 | memerr:
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| 147 | ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ERR_R_MALLOC_FAILURE);
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| 148 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 149 | OPENSSL_mem_debug_pop();
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| 150 | #endif
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| 151 | return 0;
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| 152 |
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| 153 | auxerr2:
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| 154 | ASN1_item_ex_free(pval, it);
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| 155 | auxerr:
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| 156 | ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ASN1_R_AUX_ERROR);
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| 157 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 158 | OPENSSL_mem_debug_pop();
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| 159 | #endif
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| 160 | return 0;
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| 161 |
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| 162 | }
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| 163 |
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| 164 | static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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| 165 | {
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| 166 | const ASN1_EXTERN_FUNCS *ef;
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| 167 |
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| 168 | switch (it->itype) {
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| 169 |
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| 170 | case ASN1_ITYPE_EXTERN:
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| 171 | ef = it->funcs;
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| 172 | if (ef && ef->asn1_ex_clear)
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| 173 | ef->asn1_ex_clear(pval, it);
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| 174 | else
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| 175 | *pval = NULL;
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| 176 | break;
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| 177 |
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| 178 | case ASN1_ITYPE_PRIMITIVE:
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| 179 | if (it->templates)
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| 180 | asn1_template_clear(pval, it->templates);
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| 181 | else
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| 182 | asn1_primitive_clear(pval, it);
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| 183 | break;
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| 184 |
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| 185 | case ASN1_ITYPE_MSTRING:
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| 186 | asn1_primitive_clear(pval, it);
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| 187 | break;
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| 188 |
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| 189 | case ASN1_ITYPE_CHOICE:
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| 190 | case ASN1_ITYPE_SEQUENCE:
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| 191 | case ASN1_ITYPE_NDEF_SEQUENCE:
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| 192 | *pval = NULL;
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| 193 | break;
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| 194 | }
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| 195 | }
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| 196 |
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| 197 | static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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| 198 | {
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| 199 | const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
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| 200 | int embed = tt->flags & ASN1_TFLG_EMBED;
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| 201 | ASN1_VALUE *tval;
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| 202 | int ret;
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| 203 | if (embed) {
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| 204 | tval = (ASN1_VALUE *)pval;
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| 205 | pval = &tval;
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| 206 | }
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| 207 | if (tt->flags & ASN1_TFLG_OPTIONAL) {
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| 208 | asn1_template_clear(pval, tt);
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| 209 | return 1;
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| 210 | }
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| 211 | /* If ANY DEFINED BY nothing to do */
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| 212 |
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| 213 | if (tt->flags & ASN1_TFLG_ADB_MASK) {
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| 214 | *pval = NULL;
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| 215 | return 1;
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| 216 | }
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| 217 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 218 | OPENSSL_mem_debug_push(tt->field_name
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| 219 | ? tt->field_name : "asn1_template_new");
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| 220 | #endif
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| 221 | /* If SET OF or SEQUENCE OF, its a STACK */
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| 222 | if (tt->flags & ASN1_TFLG_SK_MASK) {
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| 223 | STACK_OF(ASN1_VALUE) *skval;
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| 224 | skval = sk_ASN1_VALUE_new_null();
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| 225 | if (!skval) {
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| 226 | ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
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| 227 | ret = 0;
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| 228 | goto done;
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| 229 | }
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| 230 | *pval = (ASN1_VALUE *)skval;
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| 231 | ret = 1;
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| 232 | goto done;
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| 233 | }
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| 234 | /* Otherwise pass it back to the item routine */
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| 235 | ret = asn1_item_embed_new(pval, it, embed);
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| 236 | done:
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| 237 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG
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| 238 | OPENSSL_mem_debug_pop();
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| 239 | #endif
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| 240 | return ret;
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| 241 | }
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| 242 |
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| 243 | static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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| 244 | {
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| 245 | /* If ADB or STACK just NULL the field */
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| 246 | if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
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| 247 | *pval = NULL;
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| 248 | else
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| 249 | asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
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| 250 | }
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| 251 |
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| 252 | /*
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| 253 | * NB: could probably combine most of the real XXX_new() behaviour and junk
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| 254 | * all the old functions.
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| 255 | */
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| 256 |
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| 257 | static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 258 | int embed)
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| 259 | {
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| 260 | ASN1_TYPE *typ;
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| 261 | ASN1_STRING *str;
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| 262 | int utype;
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| 263 |
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| 264 | if (!it)
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| 265 | return 0;
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| 266 |
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| 267 | if (it->funcs) {
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| 268 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
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| 269 | if (pf->prim_new)
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| 270 | return pf->prim_new(pval, it);
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| 271 | }
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| 272 |
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| 273 | if (it->itype == ASN1_ITYPE_MSTRING)
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| 274 | utype = -1;
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| 275 | else
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| 276 | utype = it->utype;
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| 277 | switch (utype) {
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| 278 | case V_ASN1_OBJECT:
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| 279 | *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
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| 280 | return 1;
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| 281 |
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| 282 | case V_ASN1_BOOLEAN:
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| 283 | *(ASN1_BOOLEAN *)pval = it->size;
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| 284 | return 1;
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| 285 |
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| 286 | case V_ASN1_NULL:
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| 287 | *pval = (ASN1_VALUE *)1;
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| 288 | return 1;
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| 289 |
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| 290 | case V_ASN1_ANY:
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| 291 | typ = OPENSSL_malloc(sizeof(*typ));
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| 292 | if (typ == NULL)
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| 293 | return 0;
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| 294 | typ->value.ptr = NULL;
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| 295 | typ->type = -1;
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| 296 | *pval = (ASN1_VALUE *)typ;
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| 297 | break;
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| 298 |
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| 299 | default:
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| 300 | if (embed) {
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| 301 | str = *(ASN1_STRING **)pval;
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| 302 | memset(str, 0, sizeof(*str));
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| 303 | str->type = utype;
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| 304 | str->flags = ASN1_STRING_FLAG_EMBED;
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| 305 | } else {
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| 306 | str = ASN1_STRING_type_new(utype);
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| 307 | *pval = (ASN1_VALUE *)str;
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| 308 | }
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| 309 | if (it->itype == ASN1_ITYPE_MSTRING && str)
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| 310 | str->flags |= ASN1_STRING_FLAG_MSTRING;
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| 311 | break;
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| 312 | }
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| 313 | if (*pval)
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| 314 | return 1;
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| 315 | return 0;
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| 316 | }
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| 317 |
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| 318 | static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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| 319 | {
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| 320 | int utype;
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| 321 | if (it && it->funcs) {
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| 322 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
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| 323 | if (pf->prim_clear)
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| 324 | pf->prim_clear(pval, it);
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| 325 | else
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| 326 | *pval = NULL;
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| 327 | return;
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| 328 | }
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| 329 | if (!it || (it->itype == ASN1_ITYPE_MSTRING))
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| 330 | utype = -1;
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| 331 | else
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| 332 | utype = it->utype;
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| 333 | if (utype == V_ASN1_BOOLEAN)
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| 334 | *(ASN1_BOOLEAN *)pval = it->size;
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| 335 | else
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| 336 | *pval = NULL;
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| 337 | }
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