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https://github.com/openssl/openssl.git
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96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/asn1t.h>
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#ifndef NO_OLD_ASN1
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void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, const void *x)
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{
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unsigned char *b, *p;
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const unsigned char *p2;
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int i;
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char *ret;
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if (x == NULL)
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return NULL;
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i = i2d(x, NULL);
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if (i <= 0)
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return NULL;
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b = OPENSSL_malloc(i + 10);
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if (b == NULL)
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return NULL;
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p = b;
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i = i2d(x, &p);
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p2 = b;
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ret = d2i(NULL, &p2, i);
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OPENSSL_free(b);
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return ret;
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}
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#endif
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/*
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* ASN1_ITEM version of dup: this follows the model above except we don't
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* need to allocate the buffer. At some point this could be rewritten to
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* directly dup the underlying structure instead of doing and encode and
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* decode.
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*/
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void *ASN1_item_dup(const ASN1_ITEM *it, const void *x)
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{
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ASN1_aux_cb *asn1_cb = NULL;
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unsigned char *b = NULL;
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const unsigned char *p;
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long i;
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ASN1_VALUE *ret;
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OSSL_LIB_CTX *libctx = NULL;
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const char *propq = NULL;
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if (x == NULL)
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return NULL;
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if (it->itype == ASN1_ITYPE_SEQUENCE || it->itype == ASN1_ITYPE_CHOICE
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|| it->itype == ASN1_ITYPE_NDEF_SEQUENCE) {
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const ASN1_AUX *aux = it->funcs;
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asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
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}
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if (asn1_cb != NULL) {
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if (!asn1_cb(ASN1_OP_DUP_PRE, (ASN1_VALUE **)&x, it, NULL)
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|| !asn1_cb(ASN1_OP_GET0_LIBCTX, (ASN1_VALUE **)&x, it, &libctx)
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|| !asn1_cb(ASN1_OP_GET0_PROPQ, (ASN1_VALUE **)&x, it, &propq))
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goto auxerr;
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}
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i = ASN1_item_i2d(x, &b, it);
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if (i < 0 || b == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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return NULL;
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}
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p = b;
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ret = ASN1_item_d2i_ex(NULL, &p, i, it, libctx, propq);
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OPENSSL_free(b);
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if (asn1_cb != NULL
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&& !asn1_cb(ASN1_OP_DUP_POST, &ret, it, (void *)x))
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goto auxerr;
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return ret;
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auxerr:
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ERR_raise_data(ERR_LIB_ASN1, ASN1_R_AUX_ERROR, "Type=%s", it->sname);
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return NULL;
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}
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