hash, or null when the
algorithm has no PKCS#1 v1.5 DigestInfo definition.
pkcs1DigestInfoPrefix
fn
ubyte[] pkcs1DigestInfoPrefix(Hash hash)Returns the DER DigestInfo prefix for a PKCS#1 v1.5 signature.
The prefix encodes the hash algorithm OID (RFC 8017, section 9.2, note 1), so it is keyed on the exact hash implementation: two 32-byte digests from different algorithms (e.g. SHA-256 and SHA3-256) carry different prefixes, and algorithms without a registered DigestInfo (SHA-3, BLAKE2, MD5, ...) are rejected.
Parameters
hash | The hash implementation that produced the digest. |
Returns
The DER-encoded DigestInfo header for