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1.\" $OpenBSD: OPENSSL_malloc.3,v 1.13 2024/04/04 09:30:43 tb Exp $
2.\"
3.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
4.\"
5.\" Permission to use, copy, modify, and distribute this software for any
6.\" purpose with or without fee is hereby granted, provided that the above
7.\" copyright notice and this permission notice appear in all copies.
8.\"
9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16.\"
17.Dd $Mdocdate: April 4 2024 $
18.Dt OPENSSL_MALLOC 3
19.Os
20.Sh NAME
21.Nm OPENSSL_malloc ,
22.Nm OPENSSL_free ,
23.Nm OPENSSL_strdup ,
24.Nm CRYPTO_malloc ,
25.Nm CRYPTO_free ,
26.Nm CRYPTO_strdup
27.Nd legacy OpenSSL memory allocation wrappers
28.Sh SYNOPSIS
29.In openssl/crypto.h
30.Ft void *
31.Fo OPENSSL_malloc
32.Fa "size_t num"
33.Fc
34.Ft void
35.Fo OPENSSL_free
36.Fa "void *addr"
37.Fc
38.Ft char *
39.Fo OPENSSL_strdup
40.Fa "const char *str"
41.Fc
42.Ft void *
43.Fo CRYPTO_malloc
44.Fa "size_t num"
45.Fa "const char *file"
46.Fa "int line"
47.Fc
48.Ft void
49.Fo CRYPTO_free
50.Fa "void *str"
51.Fa "const char *"
52.Fa int
53.Fc
54.Ft char *
55.Fo CRYPTO_strdup
56.Fa "const char *p"
57.Fa "const char *file"
58.Fa "int line"
59.Fc
60.Sh DESCRIPTION
61Do not use any of the interfaces documented here in new code.
62They are provided purely for compatibility with legacy application code.
63.Pp
64These functions are wrappers around the corresponding
65standard
66.Xr malloc 3 ,
67.Xr free 3 ,
68and
69.Xr strdup 3
70functions.
71.Pp
72The
73.Fn OPENSSL_*
74functions are implemented as macros.
75.Sh RETURN VALUES
76These functions return the same type and value as the corresponding
77standard functions.
78.Sh SEE ALSO
79.Xr crypto 3
80.Sh HISTORY
81.Fn CRYPTO_malloc
82and
83.Fn CRYPTO_free
84first appeared in SSLeay 0.6.4 and have been available since
85.Ox 2.4 .
86.Pp
87.Fn OPENSSL_malloc
88and
89.Fn OPENSSL_free
90first appeared in OpenSSL 0.9.6 and have been available since
91.Ox 2.9 .
92.Pp
93.Fn CRYPTO_strdup
94and
95.Fn OPENSSL_strdup
96first appeared in OpenSSL 0.9.8j and have been available since
97.Ox 4.5 .
98.Sh CAVEATS
99If interoperability with other implementations is required,
100memory returned by the library as bare pointers must be freed with
101.Fn OPENSSL_free .