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141cc94e | 1 | /* |
da1c088f | 2 | * Copyright 2021-2023 The OpenSSL Project Authors. All Rights Reserved. |
141cc94e P |
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 "bio_local.h" | |
12 | ||
13 | /*- | |
14 | * Core BIO structure | |
15 | * This is distinct from a BIO to prevent casting between the two which could | |
16 | * lead to versioning problems. | |
17 | */ | |
18 | struct ossl_core_bio_st { | |
19 | CRYPTO_REF_COUNT ref_cnt; | |
141cc94e P |
20 | BIO *bio; |
21 | }; | |
22 | ||
23 | static OSSL_CORE_BIO *core_bio_new(void) | |
24 | { | |
25 | OSSL_CORE_BIO *cb = OPENSSL_malloc(sizeof(*cb)); | |
26 | ||
a22d1966 | 27 | if (cb == NULL || !CRYPTO_NEW_REF(&cb->ref_cnt, 1)) { |
141cc94e P |
28 | OPENSSL_free(cb); |
29 | return NULL; | |
30 | } | |
141cc94e P |
31 | return cb; |
32 | } | |
33 | ||
34 | int ossl_core_bio_up_ref(OSSL_CORE_BIO *cb) | |
35 | { | |
36 | int ref = 0; | |
37 | ||
a22d1966 | 38 | return CRYPTO_UP_REF(&cb->ref_cnt, &ref); |
141cc94e P |
39 | } |
40 | ||
41 | int ossl_core_bio_free(OSSL_CORE_BIO *cb) | |
42 | { | |
43 | int ref = 0, res = 1; | |
44 | ||
45 | if (cb != NULL) { | |
a22d1966 | 46 | CRYPTO_DOWN_REF(&cb->ref_cnt, &ref); |
141cc94e P |
47 | if (ref <= 0) { |
48 | res = BIO_free(cb->bio); | |
a22d1966 | 49 | CRYPTO_FREE_REF(&cb->ref_cnt); |
141cc94e P |
50 | OPENSSL_free(cb); |
51 | } | |
52 | } | |
53 | return res; | |
54 | } | |
55 | ||
56 | OSSL_CORE_BIO *ossl_core_bio_new_from_bio(BIO *bio) | |
57 | { | |
58 | OSSL_CORE_BIO *cb = core_bio_new(); | |
59 | ||
60 | if (cb == NULL || !BIO_up_ref(bio)) { | |
61 | ossl_core_bio_free(cb); | |
62 | return NULL; | |
63 | } | |
64 | cb->bio = bio; | |
65 | return cb; | |
66 | } | |
67 | ||
68 | static OSSL_CORE_BIO *core_bio_new_from_new_bio(BIO *bio) | |
69 | { | |
70 | OSSL_CORE_BIO *cb = NULL; | |
71 | ||
72 | if (bio == NULL) | |
73 | return NULL; | |
74 | if ((cb = core_bio_new()) == NULL) { | |
75 | BIO_free(bio); | |
76 | return NULL; | |
77 | } | |
78 | cb->bio = bio; | |
79 | return cb; | |
80 | } | |
81 | ||
82 | OSSL_CORE_BIO *ossl_core_bio_new_file(const char *filename, const char *mode) | |
83 | { | |
84 | return core_bio_new_from_new_bio(BIO_new_file(filename, mode)); | |
85 | } | |
86 | ||
87 | OSSL_CORE_BIO *ossl_core_bio_new_mem_buf(const void *buf, int len) | |
88 | { | |
89 | return core_bio_new_from_new_bio(BIO_new_mem_buf(buf, len)); | |
90 | } | |
91 | ||
92 | int ossl_core_bio_read_ex(OSSL_CORE_BIO *cb, void *data, size_t dlen, | |
93 | size_t *readbytes) | |
94 | { | |
95 | return BIO_read_ex(cb->bio, data, dlen, readbytes); | |
96 | } | |
97 | ||
98 | int ossl_core_bio_write_ex(OSSL_CORE_BIO *cb, const void *data, size_t dlen, | |
99 | size_t *written) | |
100 | { | |
101 | return BIO_write_ex(cb->bio, data, dlen, written); | |
102 | } | |
103 | ||
104 | int ossl_core_bio_gets(OSSL_CORE_BIO *cb, char *buf, int size) | |
105 | { | |
106 | return BIO_gets(cb->bio, buf, size); | |
107 | } | |
108 | ||
109 | int ossl_core_bio_puts(OSSL_CORE_BIO *cb, const char *buf) | |
110 | { | |
111 | return BIO_puts(cb->bio, buf); | |
112 | } | |
113 | ||
114 | long ossl_core_bio_ctrl(OSSL_CORE_BIO *cb, int cmd, long larg, void *parg) | |
115 | { | |
116 | return BIO_ctrl(cb->bio, cmd, larg, parg); | |
117 | } | |
118 | ||
119 | int ossl_core_bio_vprintf(OSSL_CORE_BIO *cb, const char *format, va_list args) | |
120 | { | |
121 | return BIO_vprintf(cb->bio, format, args); | |
122 | } |