1 // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <openssl/asn1.h>
16
17 #include <limits.h>
18
19 #include <openssl/bio.h>
20 #include <openssl/err.h>
21 #include <openssl/mem.h>
22
23
ASN1_item_d2i_bio(const ASN1_ITEM * it,BIO * in,void * x)24 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x) {
25 uint8_t *data;
26 size_t len;
27 // Historically, this function did not impose a limit in OpenSSL and is used
28 // to read CRLs, so we leave this without an external bound.
29 if (!BIO_read_asn1(in, &data, &len, INT_MAX)) {
30 return NULL;
31 }
32 const uint8_t *ptr = data;
33 void *ret = ASN1_item_d2i(reinterpret_cast<ASN1_VALUE **>(x), &ptr, len, it);
34 OPENSSL_free(data);
35 return ret;
36 }
37
ASN1_item_d2i_fp(const ASN1_ITEM * it,FILE * in,void * x)38 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x) {
39 BIO *b = BIO_new_fp(in, BIO_NOCLOSE);
40 if (b == NULL) {
41 OPENSSL_PUT_ERROR(ASN1, ERR_R_BUF_LIB);
42 return NULL;
43 }
44 void *ret = ASN1_item_d2i_bio(it, b, x);
45 BIO_free(b);
46 return ret;
47 }
48