THPDFHeadlessTimestampDigest

THPDFHeadlessTimestampDigest = (htdSHA256, htdSHA384, htdSHA512);

Selects the actual RFC3161 messageImprint digest algorithm for the ForImprint functions in HPDFHeadlessTimestamp

ValueImprint bytes requiredDigest OID
htdSHA256322.16.840.1.101.3.4.2.1
htdSHA384482.16.840.1.101.3.4.2.2
htdSHA512642.16.840.1.101.3.4.2.3

The supplied imprint is used directly rather than being hashed again; a digest-length mismatch fails before transport

See Native RFC3161 timestamps for transport and trust configuration details