ct.3ssl man page

ct — Certificate Transparency


#include <openssl/ct.h>


This library implements Certificate Transparency (CT) verification for TLS clients, as defined in RFC 6962. This verification can provide some confidence that a certificate has been publicly logged in a set of CT logs.

By default, these checks are disabled. They can be enabled using SSL_CTX_ct_enable() or SSL_ct_enable().

This library can also be used to parse and examine CT data structures, such as Signed Certificate Timestamps (SCTs), or to read a list of CT logs. There are functions for: - decoding and encoding SCTs in DER and TLS wire format. - printing SCTs. - verifying the authenticity of SCTs. - loading a CT log list from a CONF file.

See Also

d2i_SCT_LIST(3), CTLOG_STORE_new(3), CTLOG_STORE_get0_log_by_id(3), SCT_new(3), SCT_print(3), SCT_verify(3), SCT_validate(3), CT_POLICY_EVAL_CTX(3), SSL_CTX_set_ct_validation_callback(3)


This library was added in OpenSSL 1.1.0.