xref: /openssl/crypto/asn1/d2i_param.c (revision 38fc02a7)
1 /*
2  * Copyright 2019-2021 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/evp.h>
13 #include <openssl/asn1.h>
14 #include "internal/asn1.h"
15 #include "crypto/asn1.h"
16 #include "crypto/evp.h"
17 
d2i_KeyParams(int type,EVP_PKEY ** a,const unsigned char ** pp,long length)18 EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,
19                         long length)
20 {
21     EVP_PKEY *ret = NULL;
22 
23     if ((a == NULL) || (*a == NULL)) {
24         if ((ret = EVP_PKEY_new()) == NULL)
25             return NULL;
26     } else
27         ret = *a;
28 
29     if (type != EVP_PKEY_get_id(ret) && !EVP_PKEY_set_type(ret, type))
30         goto err;
31 
32     if (ret->ameth == NULL || ret->ameth->param_decode == NULL) {
33         ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE);
34         goto err;
35     }
36 
37     if (!ret->ameth->param_decode(ret, pp, length))
38         goto err;
39 
40     if (a != NULL)
41         (*a) = ret;
42     return ret;
43 err:
44     if (a == NULL || *a != ret)
45         EVP_PKEY_free(ret);
46     return NULL;
47 }
48 
d2i_KeyParams_bio(int type,EVP_PKEY ** a,BIO * in)49 EVP_PKEY *d2i_KeyParams_bio(int type, EVP_PKEY **a, BIO *in)
50 {
51     BUF_MEM *b = NULL;
52     const unsigned char *p;
53     void *ret = NULL;
54     int len;
55 
56     len = asn1_d2i_read_bio(in, &b);
57     if (len < 0)
58         goto err;
59 
60     p = (unsigned char *)b->data;
61     ret = d2i_KeyParams(type, a, &p, len);
62 err:
63     BUF_MEM_free(b);
64     return ret;
65 }
66