1.\" $OpenBSD: d2i_AUTHORITY_KEYID.3,v 1.2 2018/03/21 16:09:51 schwarze 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: March 21 2018 $ 18.Dt D2I_AUTHORITY_KEYID 3 19.Os 20.Sh NAME 21.Nm d2i_AUTHORITY_KEYID , 22.Nm i2d_AUTHORITY_KEYID 23.Nd decode and encode X.509 authority key identifiers 24.Sh SYNOPSIS 25.In openssl/x509v3.h 26.Ft AUTHORITY_KEYID * 27.Fo d2i_AUTHORITY_KEYID 28.Fa "AUTHORITY_KEYID **val_out" 29.Fa "const unsigned char **der_in" 30.Fa "long length" 31.Fc 32.Ft int 33.Fo i2d_AUTHORITY_KEYID 34.Fa "AUTHORITY_KEYID *val_in" 35.Fa "unsigned char **der_out" 36.Fc 37.Sh DESCRIPTION 38.Fn d2i_AUTHORITY_KEYID 39and 40.Fn i2d_AUTHORITY_KEYID 41decode and encode an ASN.1 42.Vt AuthorityKeyIdentifier 43structure defined in RFC 5280 section 4.2.1.1. 44For details about the semantics, examples, caveats, and bugs, see 45.Xr ASN1_item_d2i 3 . 46.Sh RETURN VALUES 47.Fn d2i_AUTHORITY_KEYID 48returns an 49.Vt AUTHORITY_KEYID 50object or 51.Dv NULL 52if an error occurs. 53.Pp 54.Fn i2d_AUTHORITY_KEYID 55returns the number of bytes successfully encoded or a negative value 56if an error occurs. 57.Sh SEE ALSO 58.Xr ASN1_item_d2i 3 , 59.Xr AUTHORITY_KEYID_new 3 , 60.Xr X509_EXTENSION_new 3 61.Sh STANDARDS 62RFC 5280: Internet X.509 Public Key Infrastructure Certificate and 63Certificate Revocation List (CRL) Profile: 64.Bl -dash -compact 65.It 66section 4.2.1.1: Certificate Extensions: Authority Key Identifier 67.It 68section 5.2.1: CRL Extensions: Authority Key Identifier 69.El 70.Sh HISTORY 71.Fn d2i_AUTHORITY_KEYID 72and 73.Fn i2d_AUTHORITY_KEYID 74first appeared in OpenSSL 0.9.2b and have been available since 75.Ox 2.6 . 76