.\"	$OpenBSD: OPENSSL_malloc.3,v 1.10 2022/11/06 18:31:15 tb Exp $
.\"
.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
.\"
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.Dd $Mdocdate: November 6 2022 $
.Dt OPENSSL_MALLOC 3
.Os
.Sh NAME
.Nm OPENSSL_malloc ,
.Nm OPENSSL_realloc ,
.Nm OPENSSL_free ,
.Nm OPENSSL_strdup ,
.Nm CRYPTO_malloc ,
.Nm CRYPTO_realloc ,
.Nm CRYPTO_free ,
.Nm CRYPTO_strdup
.Nd legacy OpenSSL memory allocation wrappers
.Sh SYNOPSIS
.In openssl/crypto.h
.Ft void *
.Fo OPENSSL_malloc
.Fa "size_t num"
.Fc
.Ft void *
.Fo OPENSSL_realloc
.Fa "void *addr"
.Fa "size_t num"
.Fc
.Ft void
.Fo OPENSSL_free
.Fa "void *addr"
.Fc
.Ft char *
.Fo OPENSSL_strdup
.Fa "const char *str"
.Fc
.Ft void *
.Fo CRYPTO_malloc
.Fa "size_t num"
.Fa "const char *file"
.Fa "int line"
.Fc
.Ft void *
.Fo CRYPTO_realloc
.Fa "void *p"
.Fa "size_t num"
.Fa "const char *file"
.Fa "int line"
.Fc
.Ft void
.Fo CRYPTO_free
.Fa "void *str"
.Fa "const char *"
.Fa int
.Fc
.Ft char *
.Fo CRYPTO_strdup
.Fa "const char *p"
.Fa "const char *file"
.Fa "int line"
.Fc
.Sh DESCRIPTION
Do not use any of the interfaces documented here in new code.
They are provided purely for compatibility with legacy application code.
.Pp
All 8 of these functions are wrappers around the corresponding
standard
.Xr malloc 3 ,
.Xr realloc 3 ,
.Xr free 3 ,
and
.Xr strdup 3
functions.
.Sh RETURN VALUES
These functions return the same type and value as the corresponding
standard functions.
.Sh SEE ALSO
.Xr crypto 3
.Sh HISTORY
.Fn CRYPTO_malloc ,
.Fn CRYPTO_realloc ,
and
.Fn CRYPTO_free
first appeared in SSLeay 0.6.4 and have been available since
.Ox 2.4 .
.Pp
.Fn OPENSSL_malloc ,
.Fn OPENSSL_realloc ,
and
.Fn OPENSSL_free
first appeared in OpenSSL 0.9.6 and have been available since
.Ox 2.9 .
.Pp
.Fn CRYPTO_strdup
and
.Fn OPENSSL_strdup
first appeared in OpenSSL 0.9.8j and have been available since
.Ox 4.5 .
.Sh CAVEATS
If interoperability with other implementations is required,
memory returned by the library as bare pointers must be freed with
.Fn OPENSSL_free .