1.\" $OpenBSD: d2i_X509_ALGOR.3,v 1.9 2018/03/27 17:35:50 schwarze Exp $ 2.\" OpenSSL 186bb907 Apr 13 11:05:13 2015 -0700 3.\" 4.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd $Mdocdate: March 27 2018 $ 19.Dt D2I_X509_ALGOR 3 20.Os 21.Sh NAME 22.Nm d2i_X509_ALGOR , 23.Nm i2d_X509_ALGOR 24.Nd decode and encode algorithm identifiers 25.Sh SYNOPSIS 26.In openssl/x509.h 27.Ft X509_ALGOR * 28.Fo d2i_X509_ALGOR 29.Fa "X509_ALGOR **val_out" 30.Fa "unsigned char **der_in" 31.Fa "long length" 32.Fc 33.Ft int 34.Fo i2d_X509_ALGOR 35.Fa "X509_ALGOR *val_in" 36.Fa "unsigned char **der_out" 37.Fc 38.Sh DESCRIPTION 39.Fn d2i_X509_ALGOR 40and 41.Fn i2d_X509_ALGOR 42decode and encode an ASN.1 43.Vt AlgorithmIdentifier 44structure defined in RFC 5280 section 4.1.1.2. 45For details about the semantics, examples, caveats, and bugs, see 46.Xr ASN1_item_d2i 3 . 47.Sh SEE ALSO 48.Xr ASN1_item_d2i 3 , 49.Xr X509_ALGOR_new 3 50.Sh STANDARDS 51RFC 5280: Internet X.509 Public Key Infrastructure Certificate and 52Certificate Revocation List (CRL) Profile 53.Sh HISTORY 54.Fn d2i_X509_ALGOR 55and 56.Fn i2d_X509_ALGOR 57first appeared in SSLeay 0.5.1 and have been available since 58.Ox 2.4 . 59