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