1 /*
2 * Copyright 2020-2022 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 <openssl/core.h>
11 #include <openssl/buffer.h>
12 #include "internal/asn1.h"
13 #include "prov/bio.h"
14 #include "endecoder_local.h"
15
16 OSSL_FUNC_keymgmt_new_fn *
ossl_prov_get_keymgmt_new(const OSSL_DISPATCH * fns)17 ossl_prov_get_keymgmt_new(const OSSL_DISPATCH *fns)
18 {
19 /* Pilfer the keymgmt dispatch table */
20 for (; fns->function_id != 0; fns++)
21 if (fns->function_id == OSSL_FUNC_KEYMGMT_NEW)
22 return OSSL_FUNC_keymgmt_new(fns);
23
24 return NULL;
25 }
26
27 OSSL_FUNC_keymgmt_free_fn *
ossl_prov_get_keymgmt_free(const OSSL_DISPATCH * fns)28 ossl_prov_get_keymgmt_free(const OSSL_DISPATCH *fns)
29 {
30 /* Pilfer the keymgmt dispatch table */
31 for (; fns->function_id != 0; fns++)
32 if (fns->function_id == OSSL_FUNC_KEYMGMT_FREE)
33 return OSSL_FUNC_keymgmt_free(fns);
34
35 return NULL;
36 }
37
38 OSSL_FUNC_keymgmt_import_fn *
ossl_prov_get_keymgmt_import(const OSSL_DISPATCH * fns)39 ossl_prov_get_keymgmt_import(const OSSL_DISPATCH *fns)
40 {
41 /* Pilfer the keymgmt dispatch table */
42 for (; fns->function_id != 0; fns++)
43 if (fns->function_id == OSSL_FUNC_KEYMGMT_IMPORT)
44 return OSSL_FUNC_keymgmt_import(fns);
45
46 return NULL;
47 }
48
49 OSSL_FUNC_keymgmt_export_fn *
ossl_prov_get_keymgmt_export(const OSSL_DISPATCH * fns)50 ossl_prov_get_keymgmt_export(const OSSL_DISPATCH *fns)
51 {
52 /* Pilfer the keymgmt dispatch table */
53 for (; fns->function_id != 0; fns++)
54 if (fns->function_id == OSSL_FUNC_KEYMGMT_EXPORT)
55 return OSSL_FUNC_keymgmt_export(fns);
56
57 return NULL;
58 }
59
ossl_prov_import_key(const OSSL_DISPATCH * fns,void * provctx,int selection,const OSSL_PARAM params[])60 void *ossl_prov_import_key(const OSSL_DISPATCH *fns, void *provctx,
61 int selection, const OSSL_PARAM params[])
62 {
63 OSSL_FUNC_keymgmt_new_fn *kmgmt_new = ossl_prov_get_keymgmt_new(fns);
64 OSSL_FUNC_keymgmt_free_fn *kmgmt_free = ossl_prov_get_keymgmt_free(fns);
65 OSSL_FUNC_keymgmt_import_fn *kmgmt_import = ossl_prov_get_keymgmt_import(fns);
66 void *key = NULL;
67
68 if (kmgmt_new != NULL && kmgmt_import != NULL && kmgmt_free != NULL) {
69 if ((key = kmgmt_new(provctx)) == NULL
70 || !kmgmt_import(key, selection, params)) {
71 kmgmt_free(key);
72 key = NULL;
73 }
74 }
75 return key;
76 }
77
ossl_prov_free_key(const OSSL_DISPATCH * fns,void * key)78 void ossl_prov_free_key(const OSSL_DISPATCH *fns, void *key)
79 {
80 OSSL_FUNC_keymgmt_free_fn *kmgmt_free = ossl_prov_get_keymgmt_free(fns);
81
82 if (kmgmt_free != NULL)
83 kmgmt_free(key);
84 }
85
ossl_read_der(PROV_CTX * provctx,OSSL_CORE_BIO * cin,unsigned char ** data,long * len)86 int ossl_read_der(PROV_CTX *provctx, OSSL_CORE_BIO *cin, unsigned char **data,
87 long *len)
88 {
89 BUF_MEM *mem = NULL;
90 BIO *in = ossl_bio_new_from_core_bio(provctx, cin);
91 int ok;
92
93 if (in == NULL)
94 return 0;
95 ok = (asn1_d2i_read_bio(in, &mem) >= 0);
96 if (ok) {
97 *data = (unsigned char *)mem->data;
98 *len = (long)mem->length;
99 OPENSSL_free(mem);
100 }
101 BIO_free(in);
102 return ok;
103 }
104