Gets or sets the hash algorithm of the message imprint: SHA-256 (the default), SHA-384 or SHA-512, or a SHA-3 algorithm where signing supports it. The authority must accept it.
public HashAlgorithmName DigestAlgorithm { get; set; }
RFC 3161 §2.4.1, messageImprint; ISO 32000-2 §12.8.3.1, Table 260.