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X509_NAME_delete_entry.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>X509_NAME_add_entry_by_txt</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#EXAMPLES">EXAMPLES</a></li> <li><a href="#BUGS">BUGS</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>X509_NAME_add_entry_by_txt, X509_NAME_add_entry_by_OBJ, X509_NAME_add_entry_by_NID, X509_NAME_add_entry, X509_NAME_delete_entry - X509_NAME modification functions</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/x509.h> int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type, const unsigned char *bytes, int len, int loc, int set); int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type, const unsigned char *bytes, int len, int loc, int set); int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type, const unsigned char *bytes, int len, int loc, int set); int X509_NAME_add_entry(X509_NAME *name, const X509_NAME_ENTRY *ne, int loc, int set); X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ() and X509_NAME_add_entry_by_NID() add a field whose name is defined by a string <b>field</b>, an object <b>obj</b> or a NID <b>nid</b> respectively. The field value to be added is in <b>bytes</b> of length <b>len</b>. If <b>len</b> is -1 then the field length is calculated internally using strlen(bytes).</p> <p>The type of field is determined by <b>type</b> which can either be a definition of the type of <b>bytes</b> (such as <b>MBSTRING_ASC</b>) or a standard ASN1 type (such as <b>V_ASN1_IA5STRING</b>). The new entry is added to a position determined by <b>loc</b> and <b>set</b>.</p> <p>X509_NAME_add_entry() adds a copy of <b>X509_NAME_ENTRY</b> structure <b>ne</b> to <b>name</b>. The new entry is added to a position determined by <b>loc</b> and <b>set</b>. Since a copy of <b>ne</b> is added <b>ne</b> must be freed up after the call.</p> <p>X509_NAME_delete_entry() deletes an entry from <b>name</b> at position <b>loc</b>. The deleted entry is returned and must be freed up.</p> <h1 id="NOTES">NOTES</h1> <p>The use of string types such as <b>MBSTRING_ASC</b> or <b>MBSTRING_UTF8</b> is strongly recommended for the <b>type</b> parameter. This allows the internal code to correctly determine the type of the field and to apply length checks according to the relevant standards. This is done using ASN1_STRING_set_by_NID().</p> <p>If instead an ASN1 type is used no checks are performed and the supplied data in <b>bytes</b> is used directly.</p> <p>In X509_NAME_add_entry_by_txt() the <b>field</b> string represents the field name using OBJ_txt2obj(field, 0).</p> <p>The <b>loc</b> and <b>set</b> parameters determine where a new entry should be added. For almost all applications <b>loc</b> can be set to -1 and <b>set</b> to 0. This adds a new entry to the end of <b>name</b> as a single valued RelativeDistinguishedName (RDN).</p> <p><b>loc</b> actually determines the index where the new entry is inserted: if it is -1 it is appended.</p> <p><b>set</b> determines how the new type is added. If it is zero a new RDN is created.</p> <p>If <b>set</b> is -1 or 1 it is added to the previous or next RDN structure respectively. This will then be a multivalued RDN: since multivalues RDNs are very seldom used <b>set</b> is almost always set to zero.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ(), X509_NAME_add_entry_by_NID() and X509_NAME_add_entry() return 1 for success of 0 if an error occurred.</p> <p>X509_NAME_delete_entry() returns either the deleted <b>X509_NAME_ENTRY</b> structure of <b>NULL</b> if an error occurred.</p> <h1 id="EXAMPLES">EXAMPLES</h1> <p>Create an <b>X509_NAME</b> structure:</p> <p>"C=UK, O=Disorganized Organization, CN=Joe Bloggs"</p> <pre><code> 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 */</code></pre> <h1 id="BUGS">BUGS</h1> <p><b>type</b> can still be set to <b>V_ASN1_APP_CHOOSE</b> to use a different algorithm 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.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/d2i_X509_NAME.html">d2i_X509_NAME(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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