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Revision a520723f29aac6598ff0d69e34f5e9b88213e511 authored by Matt Caswell on 14 October 2016, 12:07:00 UTC, committed by Matt Caswell on 28 October 2016, 08:43:41 UTC
Ensure we have length checks for all extensions
The previous commit inspired a review of all the length checks for the
extension adding code. This adds more robust checks and adds checks where
some were missing previously. The real solution for this is to use WPACKET
which is currently in master - but that cannot be applied to release
branches.

Reviewed-by: Rich Salz <rsalz@openssl.org>
1 parent 83a1d4b
Raw File
CMS_add0_cert.pod
=pod

=head1 NAME

CMS_add0_cert, CMS_add1_cert, CMS_get1_certs, CMS_add0_crl, CMS_add1_crl, CMS_get1_crls, - CMS certificate and CRL utility functions

=head1 SYNOPSIS

 #include <openssl/cms.h>

 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert);
 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert);
 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms);

 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl);
 int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl);
 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms);


=head1 DESCRIPTION

CMS_add0_cert() and CMS_add1_cert() add certificate B<cert> to B<cms>.
must be of type signed data or enveloped data. 

CMS_get1_certs() returns all certificates in B<cms>.

CMS_add0_crl() and CMS_add1_crl() add CRL B<crl> to B<cms>. CMS_get1_crls()
returns any CRLs in B<cms>.

=head1 NOTES

The CMS_ContentInfo structure B<cms> must be of type signed data or enveloped
data or an error will be returned.

For signed data certificates and CRLs are added to the B<certificates> and
B<crls> fields of SignedData structure. For enveloped data they are added to
B<OriginatorInfo>.

As the B<0> implies CMS_add0_cert() adds B<cert> internally to B<cms> and it
must not be freed up after the call as opposed to CMS_add1_cert() where B<cert>
must be freed up.

The same certificate or CRL must not be added to the same cms structure more
than once.

=head1 RETURN VALUES

CMS_add0_cert(), CMS_add1_cert() and CMS_add0_crl() and CMS_add1_crl() return
1 for success and 0 for failure. 

CMS_get1_certs() and CMS_get1_crls() return the STACK of certificates or CRLs
or NULL if there are none or an error occurs. The only error which will occur
in practice is if the B<cms> type is invalid.

=head1 SEE ALSO

L<ERR_get_error(3)|ERR_get_error(3)>,
L<CMS_sign(3)|CMS_sign(3)>,
L<CMS_encrypt(3)|CMS_encrypt(3)>

=head1 HISTORY

CMS_add0_cert(), CMS_add1_cert(), CMS_get1_certs(), CMS_add0_crl()
and CMS_get1_crls() were all first added to OpenSSL 0.9.8

=cut
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