105 lines
3.1 KiB
Plaintext
105 lines
3.1 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
SCT_validate, SCT_LIST_validate, SCT_get_validation_status -
|
||
|
|
checks Signed Certificate Timestamps (SCTs) are valid
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
#include <openssl/ct.h>
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
SCT_VALIDATION_STATUS_NOT_SET,
|
||
|
|
SCT_VALIDATION_STATUS_UNKNOWN_LOG,
|
||
|
|
SCT_VALIDATION_STATUS_VALID,
|
||
|
|
SCT_VALIDATION_STATUS_INVALID,
|
||
|
|
SCT_VALIDATION_STATUS_UNVERIFIED,
|
||
|
|
SCT_VALIDATION_STATUS_UNKNOWN_VERSION
|
||
|
|
} sct_validation_status_t;
|
||
|
|
|
||
|
|
int SCT_validate(SCT *sct, const CT_POLICY_EVAL_CTX *ctx);
|
||
|
|
int SCT_LIST_validate(const STACK_OF(SCT) *scts, CT_POLICY_EVAL_CTX *ctx);
|
||
|
|
sct_validation_status_t SCT_get_validation_status(const SCT *sct);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
SCT_validate() will check that an SCT is valid and verify its signature.
|
||
|
|
SCT_LIST_validate() performs the same checks on an entire stack of SCTs.
|
||
|
|
The result of the validation checks can be obtained by passing the SCT to
|
||
|
|
SCT_get_validation_status().
|
||
|
|
|
||
|
|
A CT_POLICY_EVAL_CTX must be provided that specifies:
|
||
|
|
|
||
|
|
=over 2
|
||
|
|
|
||
|
|
=item *
|
||
|
|
|
||
|
|
The certificate the SCT was issued for.
|
||
|
|
|
||
|
|
Failure to provide the certificate will result in the validation status being
|
||
|
|
SCT_VALIDATION_STATUS_UNVERIFIED.
|
||
|
|
|
||
|
|
=item *
|
||
|
|
|
||
|
|
The issuer of that certificate.
|
||
|
|
|
||
|
|
This is only required if the SCT was issued for a pre-certificate
|
||
|
|
(see RFC 6962). If it is required but not provided, the validation status will
|
||
|
|
be SCT_VALIDATION_STATUS_UNVERIFIED.
|
||
|
|
|
||
|
|
=item *
|
||
|
|
|
||
|
|
A CTLOG_STORE that contains the CT log that issued this SCT.
|
||
|
|
|
||
|
|
If the SCT was issued by a log that is not in this CTLOG_STORE, the validation
|
||
|
|
status will be SCT_VALIDATION_STATUS_UNKNOWN_LOG.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
If the SCT is of an unsupported version (only v1 is currently supported), the
|
||
|
|
validation status will be SCT_VALIDATION_STATUS_UNKNOWN_VERSION.
|
||
|
|
|
||
|
|
If the SCT's signature is incorrect, its timestamp is in the future (relative to
|
||
|
|
the time in CT_POLICY_EVAL_CTX), or if it is otherwise invalid, the validation
|
||
|
|
status will be SCT_VALIDATION_STATUS_INVALID.
|
||
|
|
|
||
|
|
If all checks pass, the validation status will be SCT_VALIDATION_STATUS_VALID.
|
||
|
|
|
||
|
|
=head1 NOTES
|
||
|
|
|
||
|
|
A return value of 0 from SCT_LIST_validate() should not be interpreted as a
|
||
|
|
failure. At a minimum, only one valid SCT may provide sufficient confidence
|
||
|
|
that a certificate has been publicly logged.
|
||
|
|
|
||
|
|
=head1 RETURN VALUES
|
||
|
|
|
||
|
|
SCT_validate() returns a negative integer if an internal error occurs, 0 if the
|
||
|
|
SCT fails validation, or 1 if the SCT passes validation.
|
||
|
|
|
||
|
|
SCT_LIST_validate() returns a negative integer if an internal error occurs, 0
|
||
|
|
if any of SCTs fails validation, or 1 if they all pass validation.
|
||
|
|
|
||
|
|
SCT_get_validation_status() returns the validation status of the SCT.
|
||
|
|
If SCT_validate() or SCT_LIST_validate() have not been passed that SCT, the
|
||
|
|
returned value will be SCT_VALIDATION_STATUS_NOT_SET.
|
||
|
|
|
||
|
|
=head1 SEE ALSO
|
||
|
|
|
||
|
|
L<ct(7)>
|
||
|
|
|
||
|
|
=head1 HISTORY
|
||
|
|
|
||
|
|
These functions were added in OpenSSL 1.1.0.
|
||
|
|
|
||
|
|
=head1 COPYRIGHT
|
||
|
|
|
||
|
|
Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
|
||
|
|
Licensed under the OpenSSL license (the "License"). You may not use
|
||
|
|
this file except in compliance with the License. You can obtain a copy
|
||
|
|
in the file LICENSE in the source distribution or at
|
||
|
|
L<https://www.openssl.org/source/license.html>.
|
||
|
|
|
||
|
|
=cut
|