BlockSignatureVerifier (XWiki Platform - Rendering - Signature 15.2 API)

```
@Role
public interface BlockSignatureVerifier
```
Verify signature of a Block.

Since:

6.1M2

Version:

$Id: d7afeda9e4636298bd07d7f57684e7e0239fb293 $

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isSupported(org.xwiki.rendering.block.Block block)`	Check if the given block can be supported by this signer.
`org.xwiki.crypto.signer.param.CMSSignedDataVerified`	`verify(byte[] signature, org.xwiki.rendering.block.Block block, org.xwiki.crypto.pkix.CertificateProvider certificateProvider)`	Verify a signature.

- Method Detail
  - verify
```
org.xwiki.crypto.signer.param.CMSSignedDataVerified verify(byte[] signature,
                                                           org.xwiki.rendering.block.Block block,
                                                           org.xwiki.crypto.pkix.CertificateProvider certificateProvider)
                                                    throws GeneralSecurityException,
                                                           IOException
```
    Verify a signature. The signature of the certificate is verified as well, but not the certificate chain.
    
    Parameters:
    
    signature - a signature produced by this signer.
    
    block - a rendering block to sign.
    
    certificateProvider - provider of certificates.
    
    Returns:
    
    the certified public key that have signed the given block or null if the signature is invalid.
    
    Throws:
    
    GeneralSecurityException - on signature verification operation error.
    
    IOException - on encoding/decoding operation error.
  - isSupported
```
boolean isSupported(org.xwiki.rendering.block.Block block)
```
    Check if the given block can be supported by this signer.
    
    Parameters:
    
    block - the block to check.
    
    Returns:
    
    true if this block can be signed/verified by this signer.