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Command: a2d_ASN1_OBJECT | Section: 3 | Source: OpenBSD | File: a2d_ASN1_OBJECT.3
A2D_ASN1_OBJECT(3) FreeBSD Library Functions Manual A2D_ASN1_OBJECT(3)
NAME
a2d_ASN1_OBJECT - DER content octets of an ASN.1 object identifier
SYNOPSIS
#include <openssl/asn1.h>
int
a2d_ASN1_OBJECT(unsigned char *der_out, int olen, const char *val_in,
int ilen);
DESCRIPTION
a2d_ASN1_OBJECT() accepts an ASCII string val_in of ilen bytes and
interprets it as the numerical form of an ASN.1 object identifier. It
writes the content octets of the DER encoding of the object identifier to
the buffer der_out which is olen bytes long. The identifier and length
octets of the DER encoding are not written.
If ilen is -1, the strlen(3) of val_in is used instead.
If der_out is a NULL pointer, writing the content octets is skipped and
only the return value is calculated.
RETURN VALUES
a2d_ASN1_OBJECT() returns the number of content octets that were or would
be written or 0 if ilen is 0, if val_in is not a valid representation of
an object identifier, if memory allocation fails, or if the number of
content octets would be larger than olen.
SEE ALSO
ASN1_OBJECT_new(3), i2d_ASN1_OBJECT(3), OBJ_create(3)
STANDARDS
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
HISTORY
a2d_ASN1_OBJECT() first appeared in SSLeay 0.8.0 and has been available
since OpenBSD 2.4.
FreeBSD 14.1-RELEASE-p8 August 9, 2023 FreeBSD 14.1-RELEASE-p8