.\" $OpenBSD: ASN1_OBJECT_new.3,v 1.16 2023/09/05 15:01:39 schwarze Exp $ .\" full merge up to: OpenSSL 99d63d4 Mar 19 12:28:58 2016 -0400 .\" .\" This file is a derived work. .\" The changes are covered by the following Copyright and license: .\" .\" Copyright (c) 2017, 2021, 2023 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. 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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: September 5 2023 $ .Dt ASN1_OBJECT_NEW 3 .Os .Sh NAME .Nm ASN1_OBJECT_new , .Nm ASN1_OBJECT_create , .Nm ASN1_OBJECT_free .Nd ASN.1 object identifiers .Sh SYNOPSIS .In openssl/asn1.h .Ft ASN1_OBJECT * .Fo ASN1_OBJECT_new .Fa void .Fc .Ft ASN1_OBJECT * .Fo ASN1_OBJECT_create .Fa "int nid" .Fa "unsigned char *content" .Fa "int len" .Fa "const char *short_name" .Fa "const char *long_name" .Fc .Ft void .Fo ASN1_OBJECT_free .Fa "ASN1_OBJECT *a" .Fc .Sh DESCRIPTION .Fn ASN1_OBJECT_new allocates and initializes an empty .Vt ASN1_OBJECT object, representing an ASN.1 OBJECT IDENTIFIER. It can hold a short name, a long name, a numeric identifier (NID), and a sequence of integers identifying a node in the International Object Identifier tree as specified in ITU-T recommendation X.660. The new object is marked as dynamically allocated. .Pp The ASN.1 object identifier type is also represented by the .Dv V_ASN1_OBJECT type identifier constant. .Pp .Fn ASN1_OBJECT_create allocates a new .Vt ASN1_OBJECT with the given .Fa nid , copies the .Fa len DER .Fa content octets, the .Fa short_name , and the .Fa long_name into it, and marks the new object and all data contained in it as dynamically allocated. .Pp Application programs normally use utility functions like .Xr OBJ_nid2obj 3 rather than using .Fn ASN1_OBJECT_new or .Fn ASN1_OBJECT_create directly. .Pp .Fn ASN1_OBJECT_free has the following effects: .Pp All data contained in .Fa a that is marked as dynamically allocated is freed, and the respective fields of .Fa a become empty. Contained data not marked as dynamically allocated remains intact. .Pp If the object .Fa a itself is marked as dynamically allocated, it is freed. Otherwise, the pointer .Fa a remains valid. .Pp If .Fa a is a .Dv NULL pointer or if neither the object itself nor any of its content is marked as dynamically allocated, no action occurs. .Sh RETURN VALUES .Fn ASN1_OBJECT_new and .Fn ASN1_OBJECT_create return a pointer to the new object or .Dv NULL if memory allocation fails, .Sh ERRORS After failure of .Fn ASN1_OBJECT_new or .Fn ASN1_OBJECT_create , the following diagnostic can be retrieved with .Xr ERR_get_error 3 , .Xr ERR_GET_REASON 3 , and .Xr ERR_reason_error_string 3 : .Bl -tag -width Ds .It Dv ERR_R_MALLOC_FAILURE Qq "malloc failure" Memory allocation failed. .El .Pp After some cases of failure of .Fn ASN1_OBJECT_create , the following diagnostic can be retrieved in addition to the above: .Bl -tag -width Ds .It Dv ERR_R_ASN1_LIB Qq "ASN1 lib" Memory allocation failed. .El .Sh SEE ALSO .Xr a2d_ASN1_OBJECT 3 , .Xr ASN1_TYPE_get 3 , .Xr d2i_ASN1_OBJECT 3 , .Xr OBJ_create 3 , .Xr OBJ_nid2obj 3 .Sh STANDARDS ITU-T Recommendation X.208, also known as ISO/IEC 8824-1: Specification of Abstract Syntax Notation One (ASN.1), section 28: Notation for the object identifier type .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), section 8.19: Encoding of an object identifier value .Sh HISTORY .Fn ASN1_OBJECT_new and .Fn ASN1_OBJECT_free first appeared in SSLeay 0.5.1 and .Fn ASN1_OBJECT_create in SSLeay 0.8.0. These functions have been available since .Ox 2.4 . .Sh BUGS The function .Fn ASN1_OBJECT_new is not useful for any practical purpose because the library does not provide any function capable of adding data to an existing object. Consequently, if the application program creates an object with .Fn ASN1_OBJECT_new , that object will always remain empty. .Pp Similarly, if an .Fa nid of .Dv NID_undef is passed to .Fn ASN1_OBJECT_create , or if .Dv NULL is passed for any of its pointer arguments, the returned object will permanently remain incomplete.