1/*
2 * Copyright 2020-2021 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 <string.h>
11#include <openssl/err.h>
12#include "crypto/ecx.h"
13
14ECX_KEY *ossl_ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, int haspubkey,
15                          const char *propq)
16{
17    ECX_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
18
19    if (ret == NULL)
20        return NULL;
21
22    ret->libctx = libctx;
23    ret->haspubkey = haspubkey;
24    switch (type) {
25    case ECX_KEY_TYPE_X25519:
26        ret->keylen = X25519_KEYLEN;
27        break;
28    case ECX_KEY_TYPE_X448:
29        ret->keylen = X448_KEYLEN;
30        break;
31    case ECX_KEY_TYPE_ED25519:
32        ret->keylen = ED25519_KEYLEN;
33        break;
34    case ECX_KEY_TYPE_ED448:
35        ret->keylen = ED448_KEYLEN;
36        break;
37    }
38    ret->type = type;
39    ret->references = 1;
40
41    if (propq != NULL) {
42        ret->propq = OPENSSL_strdup(propq);
43        if (ret->propq == NULL)
44            goto err;
45    }
46
47    ret->lock = CRYPTO_THREAD_lock_new();
48    if (ret->lock == NULL)
49        goto err;
50    return ret;
51err:
52    ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
53    OPENSSL_free(ret);
54    return NULL;
55}
56
57void ossl_ecx_key_free(ECX_KEY *key)
58{
59    int i;
60
61    if (key == NULL)
62        return;
63
64    CRYPTO_DOWN_REF(&key->references, &i, key->lock);
65    REF_PRINT_COUNT("ECX_KEY", key);
66    if (i > 0)
67        return;
68    REF_ASSERT_ISNT(i < 0);
69
70    OPENSSL_free(key->propq);
71    OPENSSL_secure_clear_free(key->privkey, key->keylen);
72    CRYPTO_THREAD_lock_free(key->lock);
73    OPENSSL_free(key);
74}
75
76void ossl_ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx)
77{
78    key->libctx = libctx;
79}
80
81int ossl_ecx_key_up_ref(ECX_KEY *key)
82{
83    int i;
84
85    if (CRYPTO_UP_REF(&key->references, &i, key->lock) <= 0)
86        return 0;
87
88    REF_PRINT_COUNT("ECX_KEY", key);
89    REF_ASSERT_ISNT(i < 2);
90    return ((i > 1) ? 1 : 0);
91}
92
93unsigned char *ossl_ecx_key_allocate_privkey(ECX_KEY *key)
94{
95    key->privkey = OPENSSL_secure_zalloc(key->keylen);
96
97    return key->privkey;
98}
99