Ed448Verify
Cryptography
Description
Verifies a PureEdDSA edwards448 signature (RFC 8032)
Syntax
Delphi
Function Ed448Verify(Const Message_, Seed: AnsiString; Out Signature: AnsiString): Boolean;Return values
| False | Seed is not 57 bytes |
|---|---|
| True | Signature holds the 114-byte R||S encoding |
Remarks
Hashing is SHAKE256(x, 114) with the SigEd448||0||0 domain prefix and empty context; r and k are reduced modulo the group order from the full 114-byte digest before use, and S = (r + k*s) mod L. Verification is available through Ed448Verify; both RFC 8032 section 7.4 known-answer vectors pass byte-for-byte.
Example
Ed448Verify(Msg, Seed, Sig);
OK:= Ed448Verify(Msg, PubKey, Sig);