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SCT_validate.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SCT_validate, SCT_LIST_validate, SCT_get_validation_status \- checks Signed Certificate Timestamps (SCTs) are valid .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSCT_validate()\fR will check that an \s-1SCT\s0 is valid and verify its signature. \&\fBSCT_LIST_validate()\fR performs the same checks on an entire stack of SCTs. The result of the validation checks can be obtained by passing the \s-1SCT\s0 to \&\fBSCT_get_validation_status()\fR. .PP A \s-1CT_POLICY_EVAL_CTX\s0 must be provided that specifies: .IP "\(bu" 2 The certificate the \s-1SCT\s0 was issued for. .Sp Failure to provide the certificate will result in the validation status being \&\s-1SCT_VALIDATION_STATUS_UNVERIFIED.\s0 .IP "\(bu" 2 The issuer of that certificate. .Sp This is only required if the \s-1SCT\s0 was issued for a pre-certificate (see \s-1RFC 6962\s0). If it is required but not provided, the validation status will be \s-1SCT_VALIDATION_STATUS_UNVERIFIED.\s0 .IP "\(bu" 2 A \s-1CTLOG_STORE\s0 that contains the \s-1CT\s0 log that issued this \s-1SCT.\s0 .Sp If the \s-1SCT\s0 was issued by a log that is not in this \s-1CTLOG_STORE,\s0 the validation status will be \s-1SCT_VALIDATION_STATUS_UNKNOWN_LOG.\s0 .PP If the \s-1SCT\s0 is of an unsupported version (only v1 is currently supported), the validation status will be \s-1SCT_VALIDATION_STATUS_UNKNOWN_VERSION.\s0 .PP If the \s-1SCT\s0's signature is incorrect, its timestamp is in the future (relative to the time in \s-1CT_POLICY_EVAL_CTX\s0), or if it is otherwise invalid, the validation status will be \s-1SCT_VALIDATION_STATUS_INVALID.\s0 .PP If all checks pass, the validation status will be \s-1SCT_VALIDATION_STATUS_VALID.\s0 .SH "NOTES" .IX Header "NOTES" A return value of 0 from \fBSCT_LIST_validate()\fR should not be interpreted as a failure. At a minimum, only one valid \s-1SCT\s0 may provide sufficient confidence that a certificate has been publicly logged. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSCT_validate()\fR returns a negative integer if an internal error occurs, 0 if the \&\s-1SCT\s0 fails validation, or 1 if the \s-1SCT\s0 passes validation. .PP \&\fBSCT_LIST_validate()\fR returns a negative integer if an internal error occurs, 0 if any of SCTs fails validation, or 1 if they all pass validation. .PP \&\fBSCT_get_validation_status()\fR returns the validation status of the \s-1SCT.\s0 If \fBSCT_validate()\fR or \fBSCT_LIST_validate()\fR have not been passed that \s-1SCT,\s0 the returned value will be \s-1SCT_VALIDATION_STATUS_NOT_SET.\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBct\fR\|(7) .SH "HISTORY" .IX Header "HISTORY" These functions were added in OpenSSL 1.1.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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