THPDFSignatureAlgorithm Type

Names the public-key signature algorithm with which a signature provider signs or verifies

Declaration

THPDFSignatureAlgorithm= (
  hsaUnknown,
  hsaRSAPKCS1v15,
  hsaRSAPSS,
  hsaECDSA,
  hsaEd25519,
  hsaEd448,
  hsaMLDSA44,
  hsaMLDSA65,
  hsaMLDSA87
  );

Unit

HPDFSignatureProvider

Values

Value	Purpose
`hsaUnknown`	No algorithm selected or recognised; the display-name mapping gives back an empty string
`hsaRSAPKCS1v15`	RSASSA-PKCS1-v1_5 over a digest supplied by the caller; reported as `RSA PKCS#1 v1.5`
`hsaRSAPSS`	RSASSA-PSS with explicit parameters over a digest supplied by the caller; reported as `RSA-PSS`
`hsaECDSA`	ECDSA over the provider's named curve, signing a digest supplied by the caller; reported as `ECDSA`
`hsaEd25519`	Ed25519 PureEdDSA, signing the message itself rather than a digest; reported as `Ed25519`
`hsaEd448`	Ed448 PureEdDSA, signing the message itself rather than a digest; reported as `Ed448`
`hsaMLDSA44`	ML-DSA-44 post-quantum signatures; carries the display name `ML-DSA-44`
`hsaMLDSA65`	ML-DSA-65 post-quantum signatures; carries the display name `ML-DSA-65`
`hsaMLDSA87`	ML-DSA-87 post-quantum signatures; carries the display name `ML-DSA-87`

Usage notes

HPDFSignatureAlgorithmName maps each value to its display name, which doubles as the algorithm name reported on signature info records
Digest-based algorithms (hsaRSAPKCS1v15, hsaRSAPSS, hsaECDSA) and PureEdDSA algorithms call for different THPDFSignatureInputKind values on the request
Certificate key inspection, such as signature size estimation, supports the RSA and ECDSA values and answers spsUnsupported for the rest

THPDFSignatureAlgorithm Type

Declaration

Unit

Values

Usage notes

Related APIs