.\" $OpenBSD: d2i_X509_NAME.3,v 1.17 2021/12/11 17:25:10 jmc Exp $ .\" checked up to: .\" OpenSSL crypto/d2i_X509_NAME 4692340e Jun 7 15:49:08 2016 -0400 and .\" OpenSSL man3/X509_NAME_get0_der 99d63d46 Oct 26 13:56:48 2016 -0400 .\" .\" Copyright (c) 2016, 2018 Ingo Schwarze .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" .Dd $Mdocdate: December 11 2021 $ .Dt D2I_X509_NAME 3 .Os .Sh NAME .Nm d2i_X509_NAME , .Nm i2d_X509_NAME , .Nm X509_NAME_get0_der , .Nm X509_NAME_dup , .Nm X509_NAME_set , .Nm d2i_X509_NAME_ENTRY , .Nm i2d_X509_NAME_ENTRY , .Nm X509_NAME_ENTRY_dup .\" In the following line, "X.501" and "Name" are not typos. .\" The "Name" type is defined in X.501, not in X.509. .\" The type is called "Name" with capital "N", not "name". .Nd decode and encode X.501 Name objects .Sh SYNOPSIS .In openssl/x509.h .Ft X509_NAME * .Fo d2i_X509_NAME .Fa "X509_NAME **val_out" .Fa "unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_X509_NAME .Fa "X509_NAME *val_in" .Fa "unsigned char **der_out" .Fc .Ft int .Fo X509_NAME_get0_der .Fa "X509_NAME *val_in" .Fa "const unsigned char **der_out" .Fa "size_t *out_len" .Fc .Ft X509_NAME * .Fo X509_NAME_dup .Fa "X509_NAME *val_in" .Fc .Ft int .Fo X509_NAME_set .Fa "X509_NAME **val_out" .Fa "X509_NAME *val_in" .Fc .Ft X509_NAME_ENTRY * .Fo d2i_X509_NAME_ENTRY .Fa "X509_NAME_ENTRY **val_out" .Fa "unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_X509_NAME_ENTRY .Fa "X509_NAME_ENTRY *val_in" .Fa "unsigned char **der_out" .Fc .Ft X509_NAME_ENTRY * .Fo X509_NAME_ENTRY_dup .Fa "X509_NAME_ENTRY *val_in" .Fc .Sh DESCRIPTION These functions decode and encode X.501 .Vt Name objects using DER format. For details about the semantics, examples, caveats, and bugs, see .Xr ASN1_item_d2i 3 . .Pp .Fn d2i_X509_NAME and .Fn i2d_X509_NAME decode and encode an ASN.1 .Vt Name structure defined in RFC 5280 section 4.1.2.4. .Pp .Fn X509_NAME_get0_der is a variant of .Fn i2d_X509_NAME that does not copy the encoded output but instead returns a pointer to the internally cached DER-encoded version of the name. Also, it does not return the length of the output in bytes, but instead stores it in .Fa out_len . If the cached encoded form happens to be out of date, both functions update it before copying it or returning a pointer to it. .Pp .Fn X509_NAME_dup copies .Fa val_in by calling .Fn i2d_X509_NAME and .Fn d2i_X509_NAME . .Pp .Fn X509_NAME_set makes sure that .Pf * Fa val_out contains the same data as .Fa val_in after the call, except that it fails if .Fa val_in is .Dv NULL . If .Pf * Fa val_out is the same pointer as .Fa val_in , the function succeeds without changing anything. Otherwise, it copies .Fa val_in using .Fn X509_NAME_dup , and in case of success, it frees .Pf * Fa val_out and sets it to a pointer to the new object. When the function fails, it never changes anything. In any case, .Fa val_in remains valid and may or may not be the same pointer as .Pf * Fa val_out after the call. .Pp .Fn d2i_X509_NAME_ENTRY and .Fn i2d_X509_NAME_ENTRY decode and encode an ASN.1 .Vt RelativeDistinguishedName structure defined in RFC 5280 section 4.1.2.4. .Pp .Fn X509_NAME_ENTRY_dup copies .Fa val_in by calling .Fn i2d_X509_NAME_ENTRY and .Fn d2i_X509_NAME_ENTRY . .Sh RETURN VALUES .Fn d2i_X509_NAME and .Fn X509_NAME_dup return the new .Vt X509_NAME object or .Dv NULL if an error occurs. .Pp .Fn X509_NAME_set and .Fn X509_NAME_get0_der return 1 on success or 0 if an error occurs. .Pp .Fn d2i_X509_NAME_ENTRY and .Fn X509_NAME_ENTRY_dup return the new .Vt X509_NAME_ENTRY object or .Dv NULL if an error occurs. .Pp .Fn i2d_X509_NAME and .Fn i2d_X509_NAME_ENTRY return the number of bytes successfully encoded or a negative value if an error occurs. .Sh SEE ALSO .Xr ASN1_item_d2i 3 , .Xr X509_NAME_ENTRY_new 3 , .Xr X509_NAME_new 3 , .Xr X509_NAME_print_ex 3 .Sh STANDARDS RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile .Pp ITU-T Recommendation X.690, also known as ISO/IEC 8825-1: Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER). .Sh HISTORY .Fn X509_NAME_dup first appeared in SSLeay 0.4.4. .Fn d2i_X509_NAME , .Fn i2d_X509_NAME , .Fn d2i_X509_NAME_ENTRY , .Fn i2d_X509_NAME_ENTRY , and .Fn X509_NAME_ENTRY_dup first appeared in SSLeay 0.5.1. .Fn X509_NAME_set first appeared in SSLeay 0.8.0. These functions have been available since .Ox 2.4 . .Pp .Fn X509_NAME_get0_der first appeared in OpenSSL 1.1.0 and has been available since .Ox 6.3 .