github.com/Consensys/quorum@v21.1.0+incompatible/plugin/local_verifier.go (about)

     1  package plugin
     2  
     3  import (
     4  	"fmt"
     5  	"io/ioutil"
     6  	"os"
     7  	"path"
     8  )
     9  
    10  const DefaultPublicKeyFile = "Central.pgp.pk"
    11  
    12  // Local Implementation of plugin.Verifier
    13  type LocalVerifier struct {
    14  	PublicKeyPath    string // where to obtain PGP public key
    15  	SignatureBaseDir string // where to obtain plugin signature file
    16  }
    17  
    18  // Build a new LocalVerifier
    19  func NewLocalVerifier(publicKeyPath string, pluginSignatureBaseDir string) (*LocalVerifier, error) {
    20  	if _, err := os.Stat(publicKeyPath); os.IsNotExist(err) {
    21  		return nil, err
    22  	}
    23  	stat, err := os.Stat(pluginSignatureBaseDir)
    24  	if os.IsNotExist(err) {
    25  		return nil, err
    26  	}
    27  	if !stat.Mode().IsDir() {
    28  		return nil, fmt.Errorf("pluginSignatureBaseDir is not a directory")
    29  	}
    30  	verifier := &LocalVerifier{
    31  		PublicKeyPath:    publicKeyPath,
    32  		SignatureBaseDir: pluginSignatureBaseDir,
    33  	}
    34  	return verifier, nil
    35  }
    36  
    37  // Verify a plugin giving its name from Central
    38  func (v *LocalVerifier) VerifySignature(definition *PluginDefinition, checksum string) error {
    39  	pluginSigPath := path.Join(v.SignatureBaseDir, definition.SignatureFileName())
    40  	if _, err := os.Stat(pluginSigPath); os.IsNotExist(err) {
    41  		return err
    42  	}
    43  	pubkey, err := ioutil.ReadFile(v.PublicKeyPath)
    44  	if err != nil {
    45  		return err
    46  	}
    47  	sig, err := ioutil.ReadFile(pluginSigPath)
    48  	if err != nil {
    49  		return err
    50  	}
    51  	return verify(sig, pubkey, checksum)
    52  }