.\" $OpenBSD: X509_NAME_add_entry_by_txt.3,v 1.16 2022/03/31 17:27:17 naddy Exp $ .\" OpenSSL aebb9aac Jul 19 09:27:53 2016 -0400 .\" .\" This file was written by Dr. Stephen Henson . .\" Copyright (c) 2002, 2005, 2006, 2013, 2014 The OpenSSL Project. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in .\" the documentation and/or other materials provided with the .\" distribution. .\" .\" 3. 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Redistributions of any form whatsoever must retain the following .\" acknowledgment: .\" "This product includes software developed by the OpenSSL Project .\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" .\" .\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY .\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: March 31 2022 $ .Dt X509_NAME_ADD_ENTRY_BY_TXT 3 .Os .Sh NAME .Nm X509_NAME_add_entry_by_txt , .Nm X509_NAME_add_entry_by_OBJ , .Nm X509_NAME_add_entry_by_NID , .Nm X509_NAME_add_entry , .Nm X509_NAME_delete_entry .Nd X509_NAME modification functions .Sh SYNOPSIS .In openssl/x509.h .Ft int .Fo X509_NAME_add_entry_by_txt .Fa "X509_NAME *name" .Fa "const char *field" .Fa "int type" .Fa "const unsigned char *bytes" .Fa "int len" .Fa "int loc" .Fa "int set" .Fc .Ft int .Fo X509_NAME_add_entry_by_OBJ .Fa "X509_NAME *name" .Fa "const ASN1_OBJECT *obj" .Fa "int type" .Fa "const unsigned char *bytes" .Fa "int len" .Fa "int loc" .Fa "int set" .Fc .Ft int .Fo X509_NAME_add_entry_by_NID .Fa "X509_NAME *name" .Fa "int nid" .Fa "int type" .Fa "const unsigned char *bytes" .Fa "int len" .Fa "int loc" .Fa "int set" .Fc .Ft int .Fo X509_NAME_add_entry .Fa "X509_NAME *name" .Fa "const X509_NAME_ENTRY *ne" .Fa "int loc" .Fa "int set" .Fc .Ft X509_NAME_ENTRY * .Fo X509_NAME_delete_entry .Fa "X509_NAME *name" .Fa "int loc" .Fc .Sh DESCRIPTION .Fn X509_NAME_add_entry_by_txt , .Fn X509_NAME_add_entry_by_OBJ , and .Fn X509_NAME_add_entry_by_NID add a field whose name is defined by a string .Fa field , an object .Fa obj or a NID .Fa nid , respectively. The field value to be added is in .Fa bytes of length .Fa len . If .Fa len is -1 then the field length is calculated internally using .Fn strlen bytes . .Pp The type of field is determined by .Fa type which can either be a definition of the type of .Fa bytes (such as .Dv MBSTRING_ASC ) or a standard ASN.1 type (such as .Dv V_ASN1_IA5STRING ) . The new entry is added to a position determined by .Fa loc and .Fa set . .Pp .Fn X509_NAME_add_entry adds a copy of an .Vt X509_NAME_ENTRY structure .Fa ne to .Fa name . The new entry is added to a position determined by .Fa loc and .Fa set . Since a copy of .Fa ne is added, .Fa ne must be freed up after the call. .Pp .Fn X509_NAME_delete_entry deletes an entry from .Fa name at position .Fa loc . The deleted entry is returned and must be freed up. .Pp The use of string types such as .Dv MBSTRING_ASC or .Dv MBSTRING_UTF8 is strongly recommended for the .Fa type parameter. This allows the internal code to correctly determine the type of the field and to apply length checks according to the relevant standards. .Pp If instead an ASN.1 type is used, no checks are performed and the supplied data in .Fa bytes is used directly. .Pp In .Fn X509_NAME_add_entry_by_txt the .Fa field string represents the field name using .Fn OBJ_txt2obj field 0 . .Pp The .Fa loc and .Fa set parameters determine where a new entry should be added. For almost all applications, .Fa loc can be set to -1 and .Fa set to 0. This adds a new entry to the end of .Fa name as a single valued .Vt RelativeDistinguishedName (RDN). .Pp .Fa loc actually determines the index where the new entry is inserted: if it is -1 it is appended. .Pp .Fa set determines how the new type is added. If it is zero, a new RDN is created. .Pp If .Fa set is -1 or 1, it is added to the previous or next RDN structure respectively. This will then be a multivalued RDN: since multivalue RDNs are very seldom used, .Fa set is almost always set to zero. .Sh RETURN VALUES .Fn X509_NAME_add_entry_by_txt , .Fn X509_NAME_add_entry_by_OBJ , .Fn X509_NAME_add_entry_by_NID , and .Fn X509_NAME_add_entry return 1 for success or 0 if an error occurred. .Pp .Fn X509_NAME_delete_entry returns either the deleted .Vt X509_NAME_ENTRY structure or .Dv NULL if an error occurred. .Pp In some cases of failure, the reason can be determined with .Xr ERR_get_error 3 . .Sh EXAMPLES Create an .Vt X509_NAME structure: .Bd -literal -offset indent C=UK, O=Disorganized Organization, CN=Joe Bloggs X509_NAME *nm; nm = X509_NAME_new(); if (nm == NULL) /* Some error */ if (!X509_NAME_add_entry_by_txt(nm, "C", MBSTRING_ASC, "UK", -1, -1, 0)) /* Error */ if (!X509_NAME_add_entry_by_txt(nm, "O", MBSTRING_ASC, "Disorganized Organization", -1, -1, 0)) /* Error */ if (!X509_NAME_add_entry_by_txt(nm, "CN", MBSTRING_ASC, "Joe Bloggs", -1, -1, 0)) /* Error */ .Ed .Sh SEE ALSO .Xr d2i_X509_NAME 3 , .Xr X509_NAME_ENTRY_get_object 3 , .Xr X509_NAME_get_index_by_NID 3 , .Xr X509_NAME_new 3 .Sh HISTORY .Fn X509_NAME_add_entry and .Fn X509_NAME_delete_entry first appeared in SSLeay 0.8.0 and have been available since .Ox 2.4 . .Pp .Fn X509_NAME_add_entry_by_txt , .Fn X509_NAME_add_entry_by_OBJ , and .Fn X509_NAME_add_entry_by_NID first appeared in OpenSSL 0.9.5 and have been available since .Ox 2.7 . .Sh BUGS .Fa type can still be set to .Dv V_ASN1_APP_CHOOSE to use .Xr ASN1_PRINTABLE_type 3 to determine field types. Since this form does not understand multicharacter types, performs no length checks, and can result in invalid field types, its use is strongly discouraged.