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e9b7724687
I tried hard to keep the lines at 80 characters or less, but in a few cases I had to punt and just indented the subsequent lines by 4 spaces. A few well-placed typedefs for callback functions would really help, but these would be part of the API, so that's probably for later. I also took the liberty of inserting empty lines in overlong blocks to provide some visual space. Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/1956)
128 lines
4.5 KiB
Plaintext
128 lines
4.5 KiB
Plaintext
=pod
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=head1 NAME
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X509_NAME_add_entry_by_txt, X509_NAME_add_entry_by_OBJ, X509_NAME_add_entry_by_NID,
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X509_NAME_add_entry, X509_NAME_delete_entry - X509_NAME modification functions
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=head1 SYNOPSIS
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#include <openssl/x509.h>
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int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
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const unsigned char *bytes, int len, int loc, int set);
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int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
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const unsigned char *bytes, int len, int loc, int set);
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int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
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const unsigned char *bytes, int len, int loc, int set);
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int X509_NAME_add_entry(X509_NAME *name, const X509_NAME_ENTRY *ne, int loc, int set);
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X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc);
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=head1 DESCRIPTION
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X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ() and
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X509_NAME_add_entry_by_NID() add a field whose name is defined
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by a string B<field>, an object B<obj> or a NID B<nid> respectively.
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The field value to be added is in B<bytes> of length B<len>. If
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B<len> is -1 then the field length is calculated internally using
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strlen(bytes).
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The type of field is determined by B<type> which can either be a
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definition of the type of B<bytes> (such as B<MBSTRING_ASC>) or a
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standard ASN1 type (such as B<V_ASN1_IA5STRING>). The new entry is
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added to a position determined by B<loc> and B<set>.
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X509_NAME_add_entry() adds a copy of B<X509_NAME_ENTRY> structure B<ne>
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to B<name>. The new entry is added to a position determined by B<loc>
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and B<set>. Since a copy of B<ne> is added B<ne> must be freed up after
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the call.
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X509_NAME_delete_entry() deletes an entry from B<name> at position
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B<loc>. The deleted entry is returned and must be freed up.
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=head1 NOTES
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The use of string types such as B<MBSTRING_ASC> or B<MBSTRING_UTF8>
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is strongly recommended for the B<type> parameter. This allows the
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internal code to correctly determine the type of the field and to
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apply length checks according to the relevant standards. This is
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done using ASN1_STRING_set_by_NID().
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If instead an ASN1 type is used no checks are performed and the
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supplied data in B<bytes> is used directly.
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In X509_NAME_add_entry_by_txt() the B<field> string represents
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the field name using OBJ_txt2obj(field, 0).
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The B<loc> and B<set> parameters determine where a new entry should
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be added. For almost all applications B<loc> can be set to -1 and B<set>
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to 0. This adds a new entry to the end of B<name> as a single valued
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RelativeDistinguishedName (RDN).
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B<loc> actually determines the index where the new entry is inserted:
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if it is -1 it is appended.
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B<set> determines how the new type is added. If it is zero a
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new RDN is created.
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If B<set> is -1 or 1 it is added to the previous or next RDN
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structure respectively. This will then be a multivalued RDN:
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since multivalues RDNs are very seldom used B<set> is almost
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always set to zero.
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=head1 EXAMPLES
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Create an B<X509_NAME> structure:
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"C=UK, O=Disorganized Organization, CN=Joe Bloggs"
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X509_NAME *nm;
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nm = X509_NAME_new();
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if (nm == NULL)
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/* Some error */
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if (!X509_NAME_add_entry_by_txt(nm, "C", MBSTRING_ASC,
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"UK", -1, -1, 0))
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/* Error */
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if (!X509_NAME_add_entry_by_txt(nm, "O", MBSTRING_ASC,
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"Disorganized Organization", -1, -1, 0))
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/* Error */
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if (!X509_NAME_add_entry_by_txt(nm, "CN", MBSTRING_ASC,
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"Joe Bloggs", -1, -1, 0))
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/* Error */
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=head1 RETURN VALUES
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X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ(),
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X509_NAME_add_entry_by_NID() and X509_NAME_add_entry() return 1 for
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success of 0 if an error occurred.
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X509_NAME_delete_entry() returns either the deleted B<X509_NAME_ENTRY>
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structure of B<NULL> if an error occurred.
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=head1 BUGS
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B<type> can still be set to B<V_ASN1_APP_CHOOSE> to use a
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different algorithm to determine field types. Since this form does
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not understand multicharacter types, performs no length checks and
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can result in invalid field types its use is strongly discouraged.
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=head1 SEE ALSO
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L<ERR_get_error(3)>, L<d2i_X509_NAME(3)>
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=head1 COPYRIGHT
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Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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