Package org.bouncycastle.pqc.crypto

## Interface MessageSigner

- All Known Subinterfaces:
    `StateAwareMessageSigner`
  All Known Implementing Classes:
    `GMSSSigner`, `GMSSStateAwareSigner`, `HSSSigner`, `LMSSigner`, `QTESLASigner`, `RainbowSigner`, `SPHINCS256Signer`, `XMSSMTSigner`, `XMSSSigner`

      public interface MessageSigner

  Base interface for a PQC signing algorithm.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `byte[]` | `generateSignature​(byte[] message)` | sign the passed in message (usually the output of a hash function).
    `void` | `init​(boolean forSigning, CipherParameters param)` | initialise the signer for signature generation or signature verification.
    `boolean` | `verifySignature​(byte[] message, byte[] signature)` | verify the message message against the signature value.

- - ### Method Detail

    - #### init

          void init​(boolean forSigning,
                    CipherParameters param)

      initialise the signer for signature generation or signature verification.
      Parameters:
        `forSigning` - true if we are generating a signature, false otherwise.
        `param` - key parameters for signature generation.

    - #### generateSignature

          byte[] generateSignature​(byte[] message)

      sign the passed in message (usually the output of a hash function).
      Parameters:
        `message` - the message to be signed.
      Returns:
        the signature of the message

    - #### verifySignature

          boolean verifySignature​(byte[] message,
                                  byte[] signature)

      verify the message message against the signature value.
      Parameters:
        `message` - the message that was supposed to have been signed.
        `signature` - the signature of the message