1 /*
2 * Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1t.h>
13
14 #ifndef NO_OLD_ASN1
15
ASN1_dup(i2d_of_void * i2d,d2i_of_void * d2i,const void * x)16 void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, const void *x)
17 {
18 unsigned char *b, *p;
19 const unsigned char *p2;
20 int i;
21 char *ret;
22
23 if (x == NULL)
24 return NULL;
25
26 i = i2d(x, NULL);
27 if (i <= 0)
28 return NULL;
29
30 b = OPENSSL_malloc(i + 10);
31 if (b == NULL)
32 return NULL;
33 p = b;
34 i = i2d(x, &p);
35 p2 = b;
36 ret = d2i(NULL, &p2, i);
37 OPENSSL_free(b);
38 return ret;
39 }
40
41 #endif
42
43 /*
44 * ASN1_ITEM version of dup: this follows the model above except we don't
45 * need to allocate the buffer. At some point this could be rewritten to
46 * directly dup the underlying structure instead of doing and encode and
47 * decode.
48 */
49
ASN1_item_dup(const ASN1_ITEM * it,const void * x)50 void *ASN1_item_dup(const ASN1_ITEM *it, const void *x)
51 {
52 ASN1_aux_cb *asn1_cb = NULL;
53 unsigned char *b = NULL;
54 const unsigned char *p;
55 long i;
56 ASN1_VALUE *ret;
57 OSSL_LIB_CTX *libctx = NULL;
58 const char *propq = NULL;
59
60 if (x == NULL)
61 return NULL;
62
63 if (it->itype == ASN1_ITYPE_SEQUENCE || it->itype == ASN1_ITYPE_CHOICE
64 || it->itype == ASN1_ITYPE_NDEF_SEQUENCE) {
65 const ASN1_AUX *aux = it->funcs;
66
67 asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
68 }
69
70 if (asn1_cb != NULL) {
71 if (!asn1_cb(ASN1_OP_DUP_PRE, (ASN1_VALUE **)&x, it, NULL)
72 || !asn1_cb(ASN1_OP_GET0_LIBCTX, (ASN1_VALUE **)&x, it, &libctx)
73 || !asn1_cb(ASN1_OP_GET0_PROPQ, (ASN1_VALUE **)&x, it, &propq))
74 goto auxerr;
75 }
76
77 i = ASN1_item_i2d(x, &b, it);
78 if (i < 0 || b == NULL) {
79 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
80 return NULL;
81 }
82 p = b;
83 ret = ASN1_item_d2i_ex(NULL, &p, i, it, libctx, propq);
84 OPENSSL_free(b);
85
86 if (asn1_cb != NULL
87 && !asn1_cb(ASN1_OP_DUP_POST, &ret, it, (void *)x))
88 goto auxerr;
89
90 return ret;
91
92 auxerr:
93 ERR_raise_data(ERR_LIB_ASN1, ASN1_R_AUX_ERROR, "Type=%s", it->sname);
94 return NULL;
95 }
96
