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1.\" $OpenBSD: SSL_library_init.3,v 1.8 2025/06/08 22:52:00 schwarze Exp $
2.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
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51.Dd $Mdocdate: June 8 2025 $
52.Dt SSL_LIBRARY_INIT 3
53.Os
54.Sh NAME
55.Nm SSL_library_init ,
56.Nm OpenSSL_add_ssl_algorithms ,
57.Nm SSLeay_add_ssl_algorithms
58.Nd initialize SSL library by registering algorithms
59.Sh SYNOPSIS
60.Lb libssl libcrypto
61.In openssl/ssl.h
62.Ft int
63.Fn SSL_library_init void
64.Ft int
65.Fn OpenSSL_add_ssl_algorithms void
66.Ft int
67.Fn SSLeay_add_ssl_algorithms void
68.Sh DESCRIPTION
69These functions are deprecated.
70It is never useful for any application program to call any of them explicitly.
71The library automatically calls them internally whenever needed.
72.Pp
73.Fn SSL_library_init
74registers the available ciphers and digests
75which are used directly or indirectly by TLS.
76.Pp
77.Fn OpenSSL_add_ssl_algorithms
78and
79.Fn SSLeay_add_ssl_algorithms
80are synonyms for
81.Fn SSL_library_init
82and are implemented as macros.
83.Sh RETURN VALUES
84.Fn SSL_library_init
85always returns 1.
86.Sh SEE ALSO
87.Xr ssl 3
88.Sh HISTORY
89.Fn SSLeay_add_ssl_algorithms
90first appeared in SSLeay 0.8.0 and has been available since
91.Ox 2.4 .
92.Pp
93.Fn SSL_library_init
94first appeared in OpenSSL 0.9.2b and has been available since
95.Ox 2.6 .
96.Pp
97.Fn OpenSSL_add_ssl_algorithms
98first appeared in OpenSSL 0.9.5 and has been available since
99.Ox 2.7 .