*name, const char *field, int
type, const unsigned char *bytes,
int len, int loc,
*name, ASN1_OBJECT *obj, int
type, unsigned char *bytes, int
len, int loc, int
*name, int nid, int type,
unsigned char *bytes, int len,
int loc, int set);
*name, X509_NAME_ENTRY *ne, int
loc, int set);
*name, int loc);
add a field whose name is defined by a string field,
an object obj or a NID nid,
respectively. The field value to be added is in bytes
of length len. If len is -1 then
the field length is calculated internally using
The type of field is determined by type
which can either be a definition of the type of bytes
MBSTRING_ASC) or a standard ASN.1 type
V_ASN1_IA5STRING). The new entry is added
to a position determined by loc and
adds a copy of an X509_NAME_ENTRY structure
ne to name. The new entry is
added to a position determined by loc and
set. Since a copy of ne is
added, ne must be freed up after the call.
deletes an entry from name at position
loc. The deleted entry is returned and must be freed
The use of string types such as
MBSTRING_UTF8 is strongly recommended for the
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.
If instead an ASN.1 type is used, no checks are performed and the supplied data in bytes is used directly.
the field string represents the field name using
The loc and set parameters determine where a new entry should be added. For almost all applications, loc can be set to -1 and set to 0. This adds a new entry to the end of name as a single valued RelativeDistinguishedName (RDN).
loc actually determines the index where the new entry is inserted: if it is -1 it is appended.
set determines how the new type is added. If it is zero a new RDN is created.
If 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, set is almost always set to zero.
X509_NAME_add_entry() return 1 for success or 0 if
an error occurred.
X509_NAME_delete_entry() returns either
the deleted X509_NAME_ENTRY structure or
NULL if an error occurred.
Create an X509_NAME structure:
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 */
d2i_X509_NAME(3), ERR_get_error(3), X509_NAME_get_index_by_NID(3), X509_NAME_new(3)
type can still be set to
V_ASN1_APP_CHOOSE 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.