Signer (sigstore-java 1.2.0 API)

All Known Implementing Classes:

EcdsaSigner, RsaSigner
```
public interface Signer
```
A signing helper that wraps common signing operations for use within this library.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.security.PublicKey`	`getPublicKey()`	Return the public key associated with this signer.
`byte[]`	`sign(byte[] artifact)`	Sign an artifact.
`byte[]`	`signDigest(byte[] artifactDigest)`	Sign an artifact digest.

- Method Detail
  - getPublicKey
```
java.security.PublicKey getPublicKey()
```
    Return the public key associated with this signer.
  - sign
```
byte[] sign(byte[] artifact)
     throws java.security.NoSuchAlgorithmException,
            java.security.InvalidKeyException,
            java.security.SignatureException
```
    Sign an artifact. Implementations will hash the artifact with sha256 before signing.
    
    Parameters:
    
    artifact - the bytes to be signed
    
    Throws:
    
    java.security.NoSuchAlgorithmException
    
    java.security.InvalidKeyException
    
    java.security.SignatureException
  - signDigest
```
byte[] signDigest(byte[] artifactDigest)
           throws java.security.NoSuchAlgorithmException,
                  java.security.InvalidKeyException,
                  java.security.SignatureException
```
    Sign an artifact digest. Implementations will not further hash the inputs.
    
    Parameters:
    
    artifactDigest - the sha256 digest of the artifact to be signed
    
    Throws:
    
    java.security.NoSuchAlgorithmException
    
    java.security.InvalidKeyException
    
    java.security.SignatureException