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Command: EXTENDED_KEY_USAGE_new | Section: 3 | Source: OpenBSD | File: EXTENDED_KEY_USAGE_new.3
EXTENDED_KEY_USAGE_NEW(3) FreeBSD Library Functions Manual
NAME
EXTENDED_KEY_USAGE_new, EXTENDED_KEY_USAGE_free - X.509 key usage
restrictions
SYNOPSIS
#include <openssl/x509v3.h>
EXTENDED_KEY_USAGE
EXTENDED_KEY_USAGE_new(void);
void
EXTENDED_KEY_USAGE_free(EXTENDED_KEY_USAGE *eku);
DESCRIPTION
By using the key usage extension, the extended key usage extension, or
both of them, X509 end entity certificates may indicate that the key
contained in them is only intended to be used for the specified purposes.
If both extensions are present, only uses compatible with both extensions
are intended.
EXTENDED_KEY_USAGE_new() allocates and initializes an empty
EXTENDED_KEY_USAGE object, which is a STACK_OF(ASN1_OBJECT) and
represents an ASN.1 ExtKeyUsageSyntax structure defined in RFC 5280
section 4.2.1.12. It can hold key purpose identifiers.
EXTENDED_KEY_USAGE_free() frees eku.
The key usage extension uses the ASN.1 BIT STRING data type and doesn't
require any dedicated object.
RETURN VALUES
EXTENDED_KEY_USAGE_new() returns the new EXTENDED_KEY_USAGE object or
NULL if an error occurs.
SEE ALSO
BASIC_CONSTRAINTS_new(3), d2i_EXTENDED_KEY_USAGE(3), POLICYINFO_new(3),
X509_check_purpose(3), X509_EXTENSION_new(3),
X509_get_extension_flags(3), X509_new(3)
STANDARDS
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile:
- section 4.2.1.3: Key Usage
- section 4.2.1.12: Extended Key Usage
HISTORY
EXTENDED_KEY_USAGE_new() and EXTENDED_KEY_USAGE_free() first appeared in
OpenSSL 0.9.7 and have been available since OpenBSD 3.2.
FreeBSD 14.1-RELEASE-p8 October 27, 2021 FreeBSD 14.1-RELEASE-p8