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体验新版 GitCode,发现更多精彩内容 >>
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9391ba1b
编写于
12月 11, 2015
作者:
D
Dr. Stephen Henson
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Add extension utility documentation.
Reviewed-by:
N
Kurt Roeckx
<
kurt@openssl.org
>
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doc/crypto/X509_EXTENSION_set_object.pod
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=head1 NAME
X509_EXTENSION_set_object, X509_EXTENSION_set_critical,
X509_EXTENSION_set_data, X509_EXTENSION_create_by_NID,
X509_EXTENSION_create_by_OBJ, X509_EXTENSION_get_object,
X509_EXTENSION_get_critical, X509_EXTENSION_get_data - extension utility
functions.
=head1 SYNOPSIS
int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj);
int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit);
int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data);
X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
int nid, int crit,
ASN1_OCTET_STRING *data);
X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
ASN1_OBJECT *obj, int crit,
ASN1_OCTET_STRING *data);
ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex);
int X509_EXTENSION_get_critical(X509_EXTENSION *ex);
ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ne);
=head1 DESCRIPTION
X509_EXTENSION_set_object() sets the extension type of B<ex> to B<obj>. The
B<obj> pointer is duplicated internally so B<obj> should be freed up after use.
X509_EXTENSION_set_critical() sets the criticality of B<ex> to B<crit>. If
B<crit> is zero the extension in non-critical otherwise it is critical.
X509_EXTENSION_set_data() sets the data in extension B<ex> to B<data>. The
B<data> pointer is duplicated internally.
X509_EXTENSION_create_by_NID() creates an extension of type B<nid>,
criticality B<crit> using data B<data>. The created extension is returned and
written to B<*ex> reusing or allocating a new extension if necessary so B<*ex>
should either be B<NULL> or a valid B<X509_EXTENSION> structure it must
B<not> be an uninitialised pointer.
X509_EXTENSION_create_by_OBJ() is identical to X509_EXTENSION_create_by_NID()
except it creates and extension using B<obj> instead of a NID.
X509_EXTENSION_get_object() returns the extension type of B<ex> as an
B<ASN1_OBJECT> pointer. The returned pointer is an internal value which must
not be freed up.
X509_EXTENSION_get_critical() returns the criticality of extension B<ex> it
returns B<1> for critical and B<0> for non-critical.
X509_EXTENSION_get_data() returns the data of extension B<ex>. The returned
pointer is an internal value which must not be freed up.
=head1 NOTES
These functions manipulate the contents of an extension directly. Most
applications will want to parse or encode and add an extension: they should
use the extension encode and decode functions instead such as
X509_add1_ext_i2d() and X509_get_ext_d2i().
The B<data> associated with an extension is the extension encoding in an
B<ASN1_OCTET_STRING> structure.
=head1 RETURN VALUES
X509_EXTENSION_set_object() X509_EXTENSION_set_critical() and
X509_EXTENSION_set_data() return B<1> for success and B<0> for failure.
X509_EXTENSION_create_by_NID() and X509_EXTENSION_create_by_OBJ() return
an B<X509_EXTENSION> pointer or B<NULL> if an error occurs.
X509_EXTENSION_get_object() returns an B<ASN1_OBJECT> pointer.
X509_EXTENSION_get_critical() returns B<0> for non-critical and B<1> for
critical.
X509_EXTENSION_get_data() returns an B<ASN1_OCTET_STRING> pointer.
=head1 SEE ALSO
L<X509V3_get_d2i(3)>
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