83 lines
3.3 KiB
Text
83 lines
3.3 KiB
Text
=head1 NAME
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X509_EXTENSION_set_object, X509_EXTENSION_set_critical,
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X509_EXTENSION_set_data, X509_EXTENSION_create_by_NID,
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X509_EXTENSION_create_by_OBJ, X509_EXTENSION_get_object,
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X509_EXTENSION_get_critical, X509_EXTENSION_get_data - extension utility
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functions.
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=head1 SYNOPSIS
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int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj);
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int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit);
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int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data);
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X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
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int nid, int crit,
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ASN1_OCTET_STRING *data);
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X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
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ASN1_OBJECT *obj, int crit,
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ASN1_OCTET_STRING *data);
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ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex);
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int X509_EXTENSION_get_critical(X509_EXTENSION *ex);
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ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ne);
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=head1 DESCRIPTION
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X509_EXTENSION_set_object() sets the extension type of B<ex> to B<obj>. The
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B<obj> pointer is duplicated internally so B<obj> should be freed up after use.
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X509_EXTENSION_set_critical() sets the criticality of B<ex> to B<crit>. If
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B<crit> is zero the extension in non-critical otherwise it is critical.
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X509_EXTENSION_set_data() sets the data in extension B<ex> to B<data>. The
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B<data> pointer is duplicated internally.
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X509_EXTENSION_create_by_NID() creates an extension of type B<nid>,
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criticality B<crit> using data B<data>. The created extension is returned and
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written to B<*ex> reusing or allocating a new extension if necessary so B<*ex>
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should either be B<NULL> or a valid B<X509_EXTENSION> structure it must
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B<not> be an uninitialised pointer.
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X509_EXTENSION_create_by_OBJ() is identical to X509_EXTENSION_create_by_NID()
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except it creates and extension using B<obj> instead of a NID.
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X509_EXTENSION_get_object() returns the extension type of B<ex> as an
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B<ASN1_OBJECT> pointer. The returned pointer is an internal value which must
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not be freed up.
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X509_EXTENSION_get_critical() returns the criticality of extension B<ex> it
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returns B<1> for critical and B<0> for non-critical.
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X509_EXTENSION_get_data() returns the data of extension B<ex>. The returned
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pointer is an internal value which must not be freed up.
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=head1 NOTES
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These functions manipulate the contents of an extension directly. Most
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applications will want to parse or encode and add an extension: they should
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use the extension encode and decode functions instead such as
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X509_add1_ext_i2d() and X509_get_ext_d2i().
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The B<data> associated with an extension is the extension encoding in an
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B<ASN1_OCTET_STRING> structure.
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=head1 RETURN VALUES
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X509_EXTENSION_set_object() X509_EXTENSION_set_critical() and
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X509_EXTENSION_set_data() return B<1> for success and B<0> for failure.
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X509_EXTENSION_create_by_NID() and X509_EXTENSION_create_by_OBJ() return
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an B<X509_EXTENSION> pointer or B<NULL> if an error occurs.
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X509_EXTENSION_get_object() returns an B<ASN1_OBJECT> pointer.
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X509_EXTENSION_get_critical() returns B<0> for non-critical and B<1> for
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critical.
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X509_EXTENSION_get_data() returns an B<ASN1_OCTET_STRING> pointer.
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=head1 SEE ALSO
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L<X509V3_get_d2i(3)>
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