Viewing file:  a_dup.c (2.38 KB) -rw-r--r--
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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#ifndef NO_OLD_ASN1
void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, const void *x)
{
unsigned char *b, *p;
const unsigned char *p2;
int i;
char *ret;
if (x == NULL)
return NULL;
i = i2d(x, NULL);
if (i <= 0)
return NULL;
b = OPENSSL_malloc(i + 10);
if (b == NULL) {
ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
return NULL;
}
p = b;
i = i2d(x, &p);
p2 = b;
ret = d2i(NULL, &p2, i);
OPENSSL_free(b);
return ret;
}
#endif
/*
* ASN1_ITEM version of dup: this follows the model above except we don't
* need to allocate the buffer. At some point this could be rewritten to
* directly dup the underlying structure instead of doing and encode and
* decode.
*/
void *ASN1_item_dup(const ASN1_ITEM *it, const void *x)
{
ASN1_aux_cb *asn1_cb = NULL;
unsigned char *b = NULL;
const unsigned char *p;
long i;
ASN1_VALUE *ret;
OSSL_LIB_CTX *libctx = NULL;
const char *propq = NULL;
if (x == NULL)
return NULL;
if (it->itype == ASN1_ITYPE_SEQUENCE || it->itype == ASN1_ITYPE_CHOICE
|| it->itype == ASN1_ITYPE_NDEF_SEQUENCE) {
const ASN1_AUX *aux = it->funcs;
asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
}
if (asn1_cb != NULL) {
if (!asn1_cb(ASN1_OP_DUP_PRE, (ASN1_VALUE **)&x, it, NULL)
|| !asn1_cb(ASN1_OP_GET0_LIBCTX, (ASN1_VALUE **)&x, it, &libctx)
|| !asn1_cb(ASN1_OP_GET0_PROPQ, (ASN1_VALUE **)&x, it, &propq))
goto auxerr;
}
i = ASN1_item_i2d(x, &b, it);
if (b == NULL) {
ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
return NULL;
}
p = b;
ret = ASN1_item_d2i_ex(NULL, &p, i, it, libctx, propq);
OPENSSL_free(b);
if (asn1_cb != NULL
&& !asn1_cb(ASN1_OP_DUP_POST, &ret, it, (void *)x))
goto auxerr;
return ret;
auxerr:
ERR_raise_data(ERR_LIB_ASN1, ASN1_R_AUX_ERROR, "Type=%s", it->sname);
return NULL;
}
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