=pod
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=head1 NAME
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CMS_add0_cert, CMS_add1_cert, CMS_get1_certs, CMS_add0_crl, CMS_get1_crls, - CMS certificate and CRL utility functions
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=head1 SYNOPSIS
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#include <openssl/cms.h>
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int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert);
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int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert);
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STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms);
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int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl);
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int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl);
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STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms);
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=head1 DESCRIPTION
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CMS_add0_cert() and CMS_add1_cert() add certificate B<cert> to B<cms>.
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must be of type signed data or enveloped data.
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CMS_get1_certs() returns all certificates in B<cms>.
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CMS_add0_crl() and CMS_add1_crl() add CRL B<crl> to B<cms>. CMS_get1_crls()
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returns any CRLs in B<cms>.
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=head1 NOTES
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The CMS_ContentInfo structure B<cms> must be of type signed data or enveloped
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data or an error will be returned.
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For signed data certificates and CRLs are added to the B<certificates> and
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B<crls> fields of SignedData structure. For enveloped data they are added to
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B<OriginatorInfo>.
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As the B<0> implies CMS_add0_cert() adds B<cert> internally to B<cms> and it
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must not be freed up after the call as opposed to CMS_add1_cert() where B<cert>
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must be freed up.
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The same certificate or CRL must not be added to the same cms structure more
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than once.
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=head1 RETURN VALUES
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CMS_add0_cert(), CMS_add1_cert() and CMS_add0_crl() and CMS_add1_crl() return
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1 for success and 0 for failure.
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CMS_get1_certs() and CMS_get1_crls() return the STACK of certificates or CRLs
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or NULL if there are none or an error occurs. The only error which will occur
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in practice is if the B<cms> type is invalid.
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=head1 SEE ALSO
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L<ERR_get_error(3)|ERR_get_error(3)>,
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L<CMS_sign(3)|CMS_sign(3)>,
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L<CMS_encrypt(3)|CMS_encrypt(3)>
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=head1 HISTORY
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CMS_add0_cert(), CMS_add1_cert(), CMS_get1_certs(), CMS_add0_crl()
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and CMS_get1_crls() were all first added to OpenSSL 0.9.8
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=cut
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